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<li class="navelem"><a class="el" href="dir_281f53b0585bbce1fd83a908d8484c02.html">fuse-3.9.0</a></li><li class="navelem"><a class="el" href="dir_c92f4a883baf019407b6fa7e65438cf0.html">util</a></li> </ul>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> FUSE: Filesystem in Userspace</span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu></span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"></span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> This program can be distributed under the terms of the GNU GPL.</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> See the file COPYING.</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">*/</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">/* This program does the mounting and unmounting of FUSE filesystems */</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define _GNU_SOURCE </span><span class="comment">/* for clone */</span><span class="preprocessor"></span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "config.h"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "mount_util.h"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> </div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include <stdio.h></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include <stdlib.h></span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <string.h></span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#include <ctype.h></span></div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#include <unistd.h></span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="preprocessor">#include <getopt.h></span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#include <errno.h></span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#include <fcntl.h></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#include <pwd.h></span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include <paths.h></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <mntent.h></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <sys/wait.h></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <sys/stat.h></span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include <sys/mount.h></span></div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <sys/fsuid.h></span></div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <sys/socket.h></span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <sys/utsname.h></span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include <sched.h></span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include <stdbool.h></span></div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <sys/vfs.h></span></div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#define FUSE_COMMFD_ENV "_FUSE_COMMFD"</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#define FUSE_DEV "/dev/fuse"</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#ifndef MS_DIRSYNC</span></div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#define MS_DIRSYNC 128</span></div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#ifndef MS_REC</span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#define MS_REC 16384</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#ifndef MS_PRIVATE</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor">#define MS_PRIVATE (1<<18)</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#ifndef UMOUNT_DETACH</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#define UMOUNT_DETACH 0x00000002 </span><span class="comment">/* Just detach from the tree */</span><span class="preprocessor"></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">#ifndef UMOUNT_NOFOLLOW</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor">#define UMOUNT_NOFOLLOW 0x00000008 </span><span class="comment">/* Don't follow symlink on umount */</span><span class="preprocessor"></span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor">#ifndef UMOUNT_UNUSED</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor">#define UMOUNT_UNUSED 0x80000000 </span><span class="comment">/* Flag guaranteed to be unused */</span><span class="preprocessor"></span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *progname;</div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="keyword">static</span> <span class="keywordtype">int</span> user_allow_other = 0;</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword">static</span> <span class="keywordtype">int</span> mount_max = 1000;</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> </div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="keyword">static</span> <span class="keywordtype">int</span> auto_unmount = 0;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *get_user_name(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> {</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keyword">struct </span>passwd *pw = getpwuid(getuid());</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> (pw != NULL && pw->pw_name != NULL)</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">return</span> pw->pw_name;</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  fprintf(stderr, <span class="stringliteral">"%s: could not determine username\n"</span>, progname);</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> NULL;</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  }</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">static</span> uid_t oldfsuid;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword">static</span> gid_t oldfsgid;</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="keyword">static</span> <span class="keywordtype">void</span> drop_privs(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> {</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">if</span> (getuid() != 0) {</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  oldfsuid = setfsuid(getuid());</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  oldfsgid = setfsgid(getgid());</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> }</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="keyword">static</span> <span class="keywordtype">void</span> restore_privs(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> {</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">if</span> (getuid() != 0) {</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  setfsuid(oldfsuid);</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  setfsgid(oldfsgid);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> }</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor">#ifndef IGNORE_MTAB</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">/*</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> * Make sure that /etc/mtab is checked and updated atomically</span></div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> */</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">static</span> <span class="keywordtype">int</span> lock_umount(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *mtab_lock = _PATH_MOUNTED <span class="stringliteral">".fuselock"</span>;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">int</span> mtablock;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keyword">struct </span>stat mtab_stat;</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> </div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="comment">/* /etc/mtab could be a symlink to /proc/mounts */</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">if</span> (lstat(_PATH_MOUNTED, &mtab_stat) == 0 && S_ISLNK(mtab_stat.st_mode))</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  mtablock = open(mtab_lock, O_RDWR | O_CREAT, 0600);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">if</span> (mtablock == -1) {</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  fprintf(stderr, <span class="stringliteral">"%s: unable to open fuse lock file: %s\n"</span>,</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  progname, strerror(errno));</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  }</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  res = lockf(mtablock, F_LOCK, 0);</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  <span class="keywordflow">if</span> (res < 0) {</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  fprintf(stderr, <span class="stringliteral">"%s: error getting lock: %s\n"</span>, progname,</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  strerror(errno));</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  close(mtablock);</div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  }</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> </div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span> mtablock;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> }</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="keyword">static</span> <span class="keywordtype">void</span> unlock_umount(<span class="keywordtype">int</span> mtablock)</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordflow">if</span> (mtablock >= 0) {</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  res = lockf(mtablock, F_ULOCK, 0);</div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordflow">if</span> (res < 0) {</div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  fprintf(stderr, <span class="stringliteral">"%s: error releasing lock: %s\n"</span>,</div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  progname, strerror(errno));</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  }</div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  close(mtablock);</div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> }</div><div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="keyword">static</span> <span class="keywordtype">int</span> add_mount(<span class="keyword">const</span> <span class="keywordtype">char</span> *source, <span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keyword">const</span> <span class="keywordtype">char</span> *type,</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *opts)</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> {</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> fuse_mnt_add_mount(progname, source, mnt, type, opts);</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span> }</div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="keyword">static</span> <span class="keywordtype">int</span> may_unmount(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keywordtype">int</span> quiet)</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> {</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keyword">struct </span>mntent *entp;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  FILE *fp;</div><div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *user = NULL;</div><div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordtype">char</span> uidstr[32];</div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <span class="keywordtype">unsigned</span> uidlen = 0;</div><div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keywordtype">int</span> found;</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *mtab = _PATH_MOUNTED;</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  user = get_user_name();</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">if</span> (user == NULL)</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  fp = setmntent(mtab, <span class="stringliteral">"r"</span>);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordflow">if</span> (fp == NULL) {</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>, progname, mtab,</div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  strerror(errno));</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  }</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  uidlen = sprintf(uidstr, <span class="stringliteral">"%u"</span>, getuid());</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span> </div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  found = 0;</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordflow">while</span> ((entp = getmntent(fp)) != NULL) {</div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (!found && strcmp(entp->mnt_dir, mnt) == 0 &&</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  (strcmp(entp->mnt_type, <span class="stringliteral">"fuse"</span>) == 0 ||</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  strcmp(entp->mnt_type, <span class="stringliteral">"fuseblk"</span>) == 0 ||</div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  strncmp(entp->mnt_type, <span class="stringliteral">"fuse."</span>, 5) == 0 ||</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  strncmp(entp->mnt_type, <span class="stringliteral">"fuseblk."</span>, 8) == 0)) {</div><div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordtype">char</span> *p = strstr(entp->mnt_opts, <span class="stringliteral">"user="</span>);</div><div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">if</span> (p &&</div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  (p == entp->mnt_opts || *(p-1) == <span class="charliteral">','</span>) &&</div><div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  strcmp(p + 5, user) == 0) {</div><div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  found = 1;</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="comment">/* /etc/mtab is a link pointing to</span></div><div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> /proc/mounts: */</span></div><div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((p =</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  strstr(entp->mnt_opts, <span class="stringliteral">"user_id="</span>)) &&</div><div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  (p == entp->mnt_opts ||</div><div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  *(p-1) == <span class="charliteral">','</span>) &&</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  strncmp(p + 8, uidstr, uidlen) == 0 &&</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  (*(p+8+uidlen) == <span class="charliteral">','</span> ||</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  *(p+8+uidlen) == <span class="charliteral">'\0'</span>)) {</div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  found = 1;</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  }</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  }</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  endmntent(fp);</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</span> </div><div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">if</span> (!found) {</div><div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span> (!quiet)</div><div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  fprintf(stderr,</div><div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="stringliteral">"%s: entry for %s not found in %s\n"</span>,</div><div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  progname, mnt, mtab);</div><div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div><div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span> }</div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment">/*</span></div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"> * Check whether the file specified in "fusermount3 -u" is really a</span></div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment"> * mountpoint and not a symlink. This is necessary otherwise the user</span></div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"> * could move the mountpoint away and replace it with a symlink</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment"> * pointing to an arbitrary mount, thereby tricking fusermount3 into</span></div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> * unmounting that (umount(2) will follow symlinks).</span></div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> *</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> * This is the child process running in a separate mount namespace, so</span></div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment"> * we don't mess with the global namespace and if the process is</span></div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"> * killed for any reason, mounts are automatically cleaned up.</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> *</span></div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"> * First make sure nothing is propagated back into the parent</span></div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * namespace by marking all mounts "private".</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> *</span></div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> * Then bind mount parent onto a stable base where the user can't move</span></div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * it around.</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> *</span></div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * Finally check /proc/mounts for an entry matching the requested</span></div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * mountpoint. If it's found then we are OK, and the user can't move</span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * it around within the parent directory as rename() will return</span></div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * EBUSY. Be careful to ignore any mounts that existed before the</span></div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * bind.</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> */</span></div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="keyword">static</span> <span class="keywordtype">int</span> check_is_mount_child(<span class="keywordtype">void</span> *p)</div><div class="line"><a name="l00237"></a><span class="lineno"> 237</span> {</div><div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> **a = p;</div><div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *last = a[0];</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *mnt = a[1];</div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *type = a[2];</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *procmounts = <span class="stringliteral">"/proc/mounts"</span>;</div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <span class="keywordtype">int</span> found;</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  FILE *fp;</div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keyword">struct </span>mntent *entp;</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordtype">int</span> count;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  res = mount(<span class="stringliteral">""</span>, <span class="stringliteral">"/"</span>, <span class="stringliteral">""</span>, MS_PRIVATE | MS_REC, NULL);</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to mark mounts private: %s\n"</span>,</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  progname, strerror(errno));</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div><div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  fp = setmntent(procmounts, <span class="stringliteral">"r"</span>);</div><div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span> (fp == NULL) {</div><div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>, progname,</div><div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  procmounts, strerror(errno));</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  count = 0;</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">while</span> (getmntent(fp) != NULL)</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  count++;</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  endmntent(fp);</div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span> </div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  fp = setmntent(procmounts, <span class="stringliteral">"r"</span>);</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">if</span> (fp == NULL) {</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>, progname,</div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  procmounts, strerror(errno));</div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  res = mount(<span class="stringliteral">"."</span>, <span class="stringliteral">"/"</span>, <span class="stringliteral">""</span>, MS_BIND | MS_REC, NULL);</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to bind parent to /: %s\n"</span>,</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  progname, strerror(errno));</div><div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  }</div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span> </div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  found = 0;</div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  <span class="keywordflow">while</span> ((entp = getmntent(fp)) != NULL) {</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (count > 0) {</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  count--;</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  }</div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">if</span> (entp->mnt_dir[0] == <span class="charliteral">'/'</span> &&</div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  strcmp(entp->mnt_dir + 1, last) == 0 &&</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  (!type || strcmp(entp->mnt_type, type) == 0)) {</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  found = 1;</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  }</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  endmntent(fp);</div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span> </div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">if</span> (!found) {</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  fprintf(stderr, <span class="stringliteral">"%s: %s not mounted\n"</span>, progname, mnt);</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  }</div><div class="line"><a name="l00301"></a><span class="lineno"> 301</span> </div><div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00303"></a><span class="lineno"> 303</span> }</div><div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div><div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="keyword">static</span> pid_t clone_newns(<span class="keywordtype">void</span> *a)</div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span> {</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="keywordtype">char</span> buf[131072];</div><div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordtype">char</span> *stack = buf + (<span class="keyword">sizeof</span>(buf) / 2 - ((<span class="keywordtype">size_t</span>) buf & 15));</div><div class="line"><a name="l00309"></a><span class="lineno"> 309</span> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor">#ifdef __ia64__</span></div><div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">extern</span> <span class="keywordtype">int</span> __clone2(<span class="keywordtype">int</span> (*fn)(<span class="keywordtype">void</span> *),</div><div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordtype">void</span> *child_stack_base, <span class="keywordtype">size_t</span> stack_size,</div><div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordtype">int</span> flags, <span class="keywordtype">void</span> *arg, pid_t *ptid,</div><div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordtype">void</span> *tls, pid_t *ctid);</div><div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div><div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">return</span> __clone2(check_is_mount_child, stack, <span class="keyword">sizeof</span>(buf) / 2,</div><div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  CLONE_NEWNS, a, NULL, NULL, NULL);</div><div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordflow">return</span> clone(check_is_mount_child, stack, CLONE_NEWNS, a);</div><div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00321"></a><span class="lineno"> 321</span> }</div><div class="line"><a name="l00322"></a><span class="lineno"> 322</span> </div><div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="keyword">static</span> <span class="keywordtype">int</span> check_is_mount(<span class="keyword">const</span> <span class="keywordtype">char</span> *last, <span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keyword">const</span> <span class="keywordtype">char</span> *type)</div><div class="line"><a name="l00324"></a><span class="lineno"> 324</span> {</div><div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  pid_t pid, p;</div><div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  <span class="keywordtype">int</span> status;</div><div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *a[3] = { last, mnt, type };</div><div class="line"><a name="l00328"></a><span class="lineno"> 328</span> </div><div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  pid = clone_newns((<span class="keywordtype">void</span> *) a);</div><div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">if</span> (pid == (pid_t) -1) {</div><div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to clone namespace: %s\n"</span>,</div><div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  progname, strerror(errno));</div><div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div><div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  p = waitpid(pid, &status, __WCLONE);</div><div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">if</span> (p == (pid_t) -1) {</div><div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  fprintf(stderr, <span class="stringliteral">"%s: waitpid failed: %s\n"</span>,</div><div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  progname, strerror(errno));</div><div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  }</div><div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">if</span> (!WIFEXITED(status)) {</div><div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  fprintf(stderr, <span class="stringliteral">"%s: child terminated abnormally (status %i)\n"</span>,</div><div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  progname, status);</div><div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  }</div><div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keywordflow">if</span> (WEXITSTATUS(status) != 0)</div><div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00348"></a><span class="lineno"> 348</span> </div><div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00350"></a><span class="lineno"> 350</span> }</div><div class="line"><a name="l00351"></a><span class="lineno"> 351</span> </div><div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="keyword">static</span> <span class="keywordtype">int</span> chdir_to_parent(<span class="keywordtype">char</span> *copy, <span class="keyword">const</span> <span class="keywordtype">char</span> **lastp)</div><div class="line"><a name="l00353"></a><span class="lineno"> 353</span> {</div><div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <span class="keywordtype">char</span> *tmp;</div><div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *parent;</div><div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keywordtype">char</span> buf[65536];</div><div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div><div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  tmp = strrchr(copy, <span class="charliteral">'/'</span>);</div><div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">if</span> (tmp == NULL || tmp[1] == <span class="charliteral">'\0'</span>) {</div><div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  fprintf(stderr, <span class="stringliteral">"%s: internal error: invalid abs path: <%s>\n"</span>,</div><div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  progname, copy);</div><div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  }</div><div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keywordflow">if</span> (tmp != copy) {</div><div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  *tmp = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  parent = copy;</div><div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  *lastp = tmp + 1;</div><div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (tmp[1] != <span class="charliteral">'\0'</span>) {</div><div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  *lastp = tmp + 1;</div><div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  parent = <span class="stringliteral">"/"</span>;</div><div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  *lastp = <span class="stringliteral">"."</span>;</div><div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  parent = <span class="stringliteral">"/"</span>;</div><div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  }</div><div class="line"><a name="l00376"></a><span class="lineno"> 376</span> </div><div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  res = chdir(parent);</div><div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to chdir to %s: %s\n"</span>,</div><div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  progname, parent, strerror(errno));</div><div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  }</div><div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div><div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">if</span> (getcwd(buf, <span class="keyword">sizeof</span>(buf)) == NULL) {</div><div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to obtain current directory: %s\n"</span>,</div><div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  progname, strerror(errno));</div><div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  }</div><div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keywordflow">if</span> (strcmp(buf, parent) != 0) {</div><div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  fprintf(stderr, <span class="stringliteral">"%s: mountpoint moved (%s -> %s)\n"</span>, progname,</div><div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  parent, buf);</div><div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00393"></a><span class="lineno"> 393</span> </div><div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  }</div><div class="line"><a name="l00395"></a><span class="lineno"> 395</span> </div><div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00397"></a><span class="lineno"> 397</span> }</div><div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div><div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="preprocessor">#ifndef IGNORE_MTAB</span></div><div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment">/* Check whether the kernel supports UMOUNT_NOFOLLOW flag */</span></div><div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="keyword">static</span> <span class="keywordtype">int</span> umount_nofollow_support(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00402"></a><span class="lineno"> 402</span> {</div><div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordtype">int</span> res = umount2(<span class="stringliteral">""</span>, UMOUNT_UNUSED);</div><div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  <span class="keywordflow">if</span> (res != -1 || errno != EINVAL)</div><div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00406"></a><span class="lineno"> 406</span> </div><div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  res = umount2(<span class="stringliteral">""</span>, UMOUNT_NOFOLLOW);</div><div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  <span class="keywordflow">if</span> (res != -1 || errno != ENOENT)</div><div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00410"></a><span class="lineno"> 410</span> </div><div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00412"></a><span class="lineno"> 412</span> }</div><div class="line"><a name="l00413"></a><span class="lineno"> 413</span> </div><div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="keyword">static</span> <span class="keywordtype">int</span> unmount_fuse_locked(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keywordtype">int</span> quiet, <span class="keywordtype">int</span> lazy)</div><div class="line"><a name="l00415"></a><span class="lineno"> 415</span> {</div><div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordtype">char</span> *copy;</div><div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *last;</div><div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordtype">int</span> umount_flags = lazy ? UMOUNT_DETACH : 0;</div><div class="line"><a name="l00420"></a><span class="lineno"> 420</span> </div><div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keywordflow">if</span> (getuid() != 0) {</div><div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  res = may_unmount(mnt, quiet);</div><div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  }</div><div class="line"><a name="l00426"></a><span class="lineno"> 426</span> </div><div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  copy = strdup(mnt);</div><div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">if</span> (copy == NULL) {</div><div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, progname);</div><div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  }</div><div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div><div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  drop_privs();</div><div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  res = chdir_to_parent(copy, &last);</div><div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  restore_privs();</div><div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="keywordflow">goto</span> out;</div><div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div><div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordflow">if</span> (umount_nofollow_support()) {</div><div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  umount_flags |= UMOUNT_NOFOLLOW;</div><div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  res = check_is_mount(last, mnt, NULL);</div><div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">goto</span> out;</div><div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  }</div><div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div><div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  res = umount2(last, umount_flags);</div><div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <span class="keywordflow">if</span> (res == -1 && !quiet) {</div><div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to unmount %s: %s\n"</span>,</div><div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  progname, mnt, strerror(errno));</div><div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  }</div><div class="line"><a name="l00452"></a><span class="lineno"> 452</span> </div><div class="line"><a name="l00453"></a><span class="lineno"> 453</span> out:</div><div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  free(copy);</div><div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00457"></a><span class="lineno"> 457</span> </div><div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  res = chdir(<span class="stringliteral">"/"</span>);</div><div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to chdir to '/'\n"</span>, progname);</div><div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  }</div><div class="line"><a name="l00463"></a><span class="lineno"> 463</span> </div><div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  <span class="keywordflow">return</span> fuse_mnt_remove_mount(progname, mnt);</div><div class="line"><a name="l00465"></a><span class="lineno"> 465</span> }</div><div class="line"><a name="l00466"></a><span class="lineno"> 466</span> </div><div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="keyword">static</span> <span class="keywordtype">int</span> unmount_fuse(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keywordtype">int</span> quiet, <span class="keywordtype">int</span> lazy)</div><div class="line"><a name="l00468"></a><span class="lineno"> 468</span> {</div><div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  <span class="keywordtype">int</span> mtablock = lock_umount();</div><div class="line"><a name="l00471"></a><span class="lineno"> 471</span> </div><div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  res = unmount_fuse_locked(mnt, quiet, lazy);</div><div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  unlock_umount(mtablock);</div><div class="line"><a name="l00474"></a><span class="lineno"> 474</span> </div><div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  <span class="keywordflow">return</span> res;</div><div class="line"><a name="l00476"></a><span class="lineno"> 476</span> }</div><div class="line"><a name="l00477"></a><span class="lineno"> 477</span> </div><div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="keyword">static</span> <span class="keywordtype">int</span> count_fuse_fs(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00479"></a><span class="lineno"> 479</span> {</div><div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <span class="keyword">struct </span>mntent *entp;</div><div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  <span class="keywordtype">int</span> count = 0;</div><div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *mtab = _PATH_MOUNTED;</div><div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  FILE *fp = setmntent(mtab, <span class="stringliteral">"r"</span>);</div><div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keywordflow">if</span> (fp == NULL) {</div><div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>, progname, mtab,</div><div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  strerror(errno));</div><div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  }</div><div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">while</span> ((entp = getmntent(fp)) != NULL) {</div><div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keywordflow">if</span> (strcmp(entp->mnt_type, <span class="stringliteral">"fuse"</span>) == 0 ||</div><div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  strncmp(entp->mnt_type, <span class="stringliteral">"fuse."</span>, 5) == 0)</div><div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  count ++;</div><div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  }</div><div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  endmntent(fp);</div><div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="keywordflow">return</span> count;</div><div class="line"><a name="l00496"></a><span class="lineno"> 496</span> }</div><div class="line"><a name="l00497"></a><span class="lineno"> 497</span> </div><div class="line"><a name="l00498"></a><span class="lineno"> 498</span> </div><div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="preprocessor">#else </span><span class="comment">/* IGNORE_MTAB */</span><span class="preprocessor"></span></div><div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="keyword">static</span> <span class="keywordtype">int</span> count_fuse_fs(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00501"></a><span class="lineno"> 501</span> {</div><div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00503"></a><span class="lineno"> 503</span> }</div><div class="line"><a name="l00504"></a><span class="lineno"> 504</span> </div><div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="keyword">static</span> <span class="keywordtype">int</span> add_mount(<span class="keyword">const</span> <span class="keywordtype">char</span> *source, <span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keyword">const</span> <span class="keywordtype">char</span> *type,</div><div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *opts)</div><div class="line"><a name="l00507"></a><span class="lineno"> 507</span> {</div><div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  (void) source;</div><div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  (void) mnt;</div><div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  (void) type;</div><div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  (void) opts;</div><div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00513"></a><span class="lineno"> 513</span> }</div><div class="line"><a name="l00514"></a><span class="lineno"> 514</span> </div><div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="keyword">static</span> <span class="keywordtype">int</span> unmount_fuse(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keywordtype">int</span> quiet, <span class="keywordtype">int</span> lazy)</div><div class="line"><a name="l00516"></a><span class="lineno"> 516</span> {</div><div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  (void) quiet;</div><div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <span class="keywordflow">return</span> fuse_mnt_umount(progname, mnt, mnt, lazy);</div><div class="line"><a name="l00519"></a><span class="lineno"> 519</span> }</div><div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="preprocessor">#endif </span><span class="comment">/* IGNORE_MTAB */</span><span class="preprocessor"></span></div><div class="line"><a name="l00521"></a><span class="lineno"> 521</span> </div><div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="keyword">static</span> <span class="keywordtype">void</span> strip_line(<span class="keywordtype">char</span> *line)</div><div class="line"><a name="l00523"></a><span class="lineno"> 523</span> {</div><div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordtype">char</span> *s = strchr(line, <span class="charliteral">'#'</span>);</div><div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="keywordflow">if</span> (s != NULL)</div><div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  s[0] = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">for</span> (s = line + strlen(line) - 1;</div><div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  s >= line && isspace((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>) *s); s--);</div><div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  s[1] = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="keywordflow">for</span> (s = line; isspace((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>) *s); s++);</div><div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keywordflow">if</span> (s != line)</div><div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  memmove(line, s, strlen(s)+1);</div><div class="line"><a name="l00533"></a><span class="lineno"> 533</span> }</div><div class="line"><a name="l00534"></a><span class="lineno"> 534</span> </div><div class="line"><a name="l00535"></a><span class="lineno"> 535</span> <span class="keyword">static</span> <span class="keywordtype">void</span> parse_line(<span class="keywordtype">char</span> *line, <span class="keywordtype">int</span> linenum)</div><div class="line"><a name="l00536"></a><span class="lineno"> 536</span> {</div><div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordtype">int</span> tmp;</div><div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordflow">if</span> (strcmp(line, <span class="stringliteral">"user_allow_other"</span>) == 0)</div><div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  user_allow_other = 1;</div><div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (sscanf(line, <span class="stringliteral">"mount_max = %i"</span>, &tmp) == 1)</div><div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  mount_max = tmp;</div><div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span>(line[0])</div><div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  fprintf(stderr,</div><div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="stringliteral">"%s: unknown parameter in %s at line %i: '%s'\n"</span>,</div><div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  progname, FUSE_CONF, linenum, line);</div><div class="line"><a name="l00546"></a><span class="lineno"> 546</span> }</div><div class="line"><a name="l00547"></a><span class="lineno"> 547</span> </div><div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="keyword">static</span> <span class="keywordtype">void</span> read_conf(<span class="keywordtype">void</span>)</div><div class="line"><a name="l00549"></a><span class="lineno"> 549</span> {</div><div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  FILE *fp = fopen(FUSE_CONF, <span class="stringliteral">"r"</span>);</div><div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <span class="keywordflow">if</span> (fp != NULL) {</div><div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="keywordtype">int</span> linenum = 1;</div><div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  <span class="keywordtype">char</span> line[256];</div><div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  <span class="keywordtype">int</span> isnewline = 1;</div><div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  <span class="keywordflow">while</span> (fgets(line, <span class="keyword">sizeof</span>(line), fp) != NULL) {</div><div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <span class="keywordflow">if</span> (isnewline) {</div><div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="keywordflow">if</span> (line[strlen(line)-1] == <span class="charliteral">'\n'</span>) {</div><div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  strip_line(line);</div><div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  parse_line(line, linenum);</div><div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  isnewline = 0;</div><div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  }</div><div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span>(line[strlen(line)-1] == <span class="charliteral">'\n'</span>) {</div><div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  fprintf(stderr, <span class="stringliteral">"%s: reading %s: line %i too long\n"</span>, progname, FUSE_CONF, linenum);</div><div class="line"><a name="l00565"></a><span class="lineno"> 565</span> </div><div class="line"><a name="l00566"></a><span class="lineno"> 566</span>  isnewline = 1;</div><div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  }</div><div class="line"><a name="l00568"></a><span class="lineno"> 568</span>  <span class="keywordflow">if</span> (isnewline)</div><div class="line"><a name="l00569"></a><span class="lineno"> 569</span>  linenum ++;</div><div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  }</div><div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <span class="keywordflow">if</span> (!isnewline) {</div><div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  fprintf(stderr, <span class="stringliteral">"%s: reading %s: missing newline at end of file\n"</span>, progname, FUSE_CONF);</div><div class="line"><a name="l00573"></a><span class="lineno"> 573</span> </div><div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  }</div><div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordflow">if</span> (ferror(fp)) {</div><div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  fprintf(stderr, <span class="stringliteral">"%s: reading %s: read failed\n"</span>, progname, FUSE_CONF);</div><div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  exit(1);</div><div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  }</div><div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  fclose(fp);</div><div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (errno != ENOENT) {</div><div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  <span class="keywordtype">bool</span> fatal = (errno != EACCES && errno != ELOOP &&</div><div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  errno != ENAMETOOLONG && errno != ENOTDIR &&</div><div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  errno != EOVERFLOW);</div><div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>,</div><div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  progname, FUSE_CONF, strerror(errno));</div><div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  <span class="keywordflow">if</span> (fatal)</div><div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  exit(1);</div><div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  }</div><div class="line"><a name="l00589"></a><span class="lineno"> 589</span> }</div><div class="line"><a name="l00590"></a><span class="lineno"> 590</span> </div><div class="line"><a name="l00591"></a><span class="lineno"> 591</span> <span class="keyword">static</span> <span class="keywordtype">int</span> begins_with(<span class="keyword">const</span> <span class="keywordtype">char</span> *s, <span class="keyword">const</span> <span class="keywordtype">char</span> *beg)</div><div class="line"><a name="l00592"></a><span class="lineno"> 592</span> {</div><div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="keywordflow">if</span> (strncmp(s, beg, strlen(beg)) == 0)</div><div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00597"></a><span class="lineno"> 597</span> }</div><div class="line"><a name="l00598"></a><span class="lineno"> 598</span> </div><div class="line"><a name="l00599"></a><span class="lineno"> 599</span> <span class="keyword">struct </span>mount_flags {</div><div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *opt;</div><div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> flag;</div><div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="keywordtype">int</span> on;</div><div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keywordtype">int</span> safe;</div><div class="line"><a name="l00604"></a><span class="lineno"> 604</span> };</div><div class="line"><a name="l00605"></a><span class="lineno"> 605</span> </div><div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="keyword">static</span> <span class="keyword">struct </span>mount_flags mount_flags[] = {</div><div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  {<span class="stringliteral">"rw"</span>, MS_RDONLY, 0, 1},</div><div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  {<span class="stringliteral">"ro"</span>, MS_RDONLY, 1, 1},</div><div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  {<span class="stringliteral">"suid"</span>, MS_NOSUID, 0, 0},</div><div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  {<span class="stringliteral">"nosuid"</span>, MS_NOSUID, 1, 1},</div><div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  {<span class="stringliteral">"dev"</span>, MS_NODEV, 0, 0},</div><div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  {<span class="stringliteral">"nodev"</span>, MS_NODEV, 1, 1},</div><div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  {<span class="stringliteral">"exec"</span>, MS_NOEXEC, 0, 1},</div><div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  {<span class="stringliteral">"noexec"</span>, MS_NOEXEC, 1, 1},</div><div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  {<span class="stringliteral">"async"</span>, MS_SYNCHRONOUS, 0, 1},</div><div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  {<span class="stringliteral">"sync"</span>, MS_SYNCHRONOUS, 1, 1},</div><div class="line"><a name="l00617"></a><span class="lineno"> 617</span>  {<span class="stringliteral">"atime"</span>, MS_NOATIME, 0, 1},</div><div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  {<span class="stringliteral">"noatime"</span>, MS_NOATIME, 1, 1},</div><div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  {<span class="stringliteral">"dirsync"</span>, MS_DIRSYNC, 1, 1},</div><div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  {NULL, 0, 0, 0}</div><div class="line"><a name="l00621"></a><span class="lineno"> 621</span> };</div><div class="line"><a name="l00622"></a><span class="lineno"> 622</span> </div><div class="line"><a name="l00623"></a><span class="lineno"> 623</span> <span class="keyword">static</span> <span class="keywordtype">int</span> find_mount_flag(<span class="keyword">const</span> <span class="keywordtype">char</span> *s, <span class="keywordtype">unsigned</span> len, <span class="keywordtype">int</span> *on, <span class="keywordtype">int</span> *flag)</div><div class="line"><a name="l00624"></a><span class="lineno"> 624</span> {</div><div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00626"></a><span class="lineno"> 626</span> </div><div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="keywordflow">for</span> (i = 0; mount_flags[i].opt != NULL; i++) {</div><div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *opt = mount_flags[i].opt;</div><div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <span class="keywordflow">if</span> (strlen(opt) == len && strncmp(opt, s, len) == 0) {</div><div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  *on = mount_flags[i].on;</div><div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  *flag = mount_flags[i].flag;</div><div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <span class="keywordflow">if</span> (!mount_flags[i].safe && getuid() != 0) {</div><div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  *flag = 0;</div><div class="line"><a name="l00634"></a><span class="lineno"> 634</span>  fprintf(stderr,</div><div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="stringliteral">"%s: unsafe option %s ignored\n"</span>,</div><div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  progname, opt);</div><div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  }</div><div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  }</div><div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  }</div><div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00642"></a><span class="lineno"> 642</span> }</div><div class="line"><a name="l00643"></a><span class="lineno"> 643</span> </div><div class="line"><a name="l00644"></a><span class="lineno"> 644</span> <span class="keyword">static</span> <span class="keywordtype">int</span> add_option(<span class="keywordtype">char</span> **optsp, <span class="keyword">const</span> <span class="keywordtype">char</span> *opt, <span class="keywordtype">unsigned</span> expand)</div><div class="line"><a name="l00645"></a><span class="lineno"> 645</span> {</div><div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keywordtype">char</span> *newopts;</div><div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="keywordflow">if</span> (*optsp == NULL)</div><div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  newopts = strdup(opt);</div><div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordtype">unsigned</span> oldsize = strlen(*optsp);</div><div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <span class="keywordtype">unsigned</span> newsize = oldsize + 1 + strlen(opt) + expand + 1;</div><div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  newopts = (<span class="keywordtype">char</span> *) realloc(*optsp, newsize);</div><div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <span class="keywordflow">if</span> (newopts)</div><div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  sprintf(newopts + oldsize, <span class="stringliteral">",%s"</span>, opt);</div><div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  }</div><div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <span class="keywordflow">if</span> (newopts == NULL) {</div><div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, progname);</div><div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  }</div><div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  *optsp = newopts;</div><div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00662"></a><span class="lineno"> 662</span> }</div><div class="line"><a name="l00663"></a><span class="lineno"> 663</span> </div><div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_mnt_opts(<span class="keywordtype">int</span> flags, <span class="keywordtype">char</span> *opts, <span class="keywordtype">char</span> **mnt_optsp)</div><div class="line"><a name="l00665"></a><span class="lineno"> 665</span> {</div><div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="keywordtype">int</span> l;</div><div class="line"><a name="l00668"></a><span class="lineno"> 668</span> </div><div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">if</span> (!(flags & MS_RDONLY) && add_option(mnt_optsp, <span class="stringliteral">"rw"</span>, 0) == -1)</div><div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00671"></a><span class="lineno"> 671</span> </div><div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  <span class="keywordflow">for</span> (i = 0; mount_flags[i].opt != NULL; i++) {</div><div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">if</span> (mount_flags[i].on && (flags & mount_flags[i].flag) &&</div><div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  add_option(mnt_optsp, mount_flags[i].opt, 0) == -1)</div><div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  }</div><div class="line"><a name="l00677"></a><span class="lineno"> 677</span> </div><div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  <span class="keywordflow">if</span> (add_option(mnt_optsp, opts, 0) == -1)</div><div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="comment">/* remove comma from end of opts*/</span></div><div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  l = strlen(*mnt_optsp);</div><div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  <span class="keywordflow">if</span> ((*mnt_optsp)[l-1] == <span class="charliteral">','</span>)</div><div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  (*mnt_optsp)[l-1] = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  <span class="keywordflow">if</span> (getuid() != 0) {</div><div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *user = get_user_name();</div><div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  <span class="keywordflow">if</span> (user == NULL)</div><div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00688"></a><span class="lineno"> 688</span> </div><div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="keywordflow">if</span> (add_option(mnt_optsp, <span class="stringliteral">"user="</span>, strlen(user)) == -1)</div><div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  strcat(*mnt_optsp, user);</div><div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  }</div><div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00694"></a><span class="lineno"> 694</span> }</div><div class="line"><a name="l00695"></a><span class="lineno"> 695</span> </div><div class="line"><a name="l00696"></a><span class="lineno"> 696</span> <span class="keyword">static</span> <span class="keywordtype">int</span> opt_eq(<span class="keyword">const</span> <span class="keywordtype">char</span> *s, <span class="keywordtype">unsigned</span> len, <span class="keyword">const</span> <span class="keywordtype">char</span> *opt)</div><div class="line"><a name="l00697"></a><span class="lineno"> 697</span> {</div><div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="keywordflow">if</span>(strlen(opt) == len && strncmp(s, opt, len) == 0)</div><div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00702"></a><span class="lineno"> 702</span> }</div><div class="line"><a name="l00703"></a><span class="lineno"> 703</span> </div><div class="line"><a name="l00704"></a><span class="lineno"> 704</span> <span class="keyword">static</span> <span class="keywordtype">int</span> get_string_opt(<span class="keyword">const</span> <span class="keywordtype">char</span> *s, <span class="keywordtype">unsigned</span> len, <span class="keyword">const</span> <span class="keywordtype">char</span> *opt,</div><div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keywordtype">char</span> **val)</div><div class="line"><a name="l00706"></a><span class="lineno"> 706</span> {</div><div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  <span class="keywordtype">int</span> i;</div><div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <span class="keywordtype">unsigned</span> opt_len = strlen(opt);</div><div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  <span class="keywordtype">char</span> *d;</div><div class="line"><a name="l00710"></a><span class="lineno"> 710</span> </div><div class="line"><a name="l00711"></a><span class="lineno"> 711</span>  <span class="keywordflow">if</span> (*val)</div><div class="line"><a name="l00712"></a><span class="lineno"> 712</span>  free(*val);</div><div class="line"><a name="l00713"></a><span class="lineno"> 713</span>  *val = (<span class="keywordtype">char</span> *) malloc(len - opt_len + 1);</div><div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  <span class="keywordflow">if</span> (!*val) {</div><div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, progname);</div><div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00717"></a><span class="lineno"> 717</span>  }</div><div class="line"><a name="l00718"></a><span class="lineno"> 718</span> </div><div class="line"><a name="l00719"></a><span class="lineno"> 719</span>  d = *val;</div><div class="line"><a name="l00720"></a><span class="lineno"> 720</span>  s += opt_len;</div><div class="line"><a name="l00721"></a><span class="lineno"> 721</span>  len -= opt_len;</div><div class="line"><a name="l00722"></a><span class="lineno"> 722</span>  <span class="keywordflow">for</span> (i = 0; i < len; i++) {</div><div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="keywordflow">if</span> (s[i] == <span class="charliteral">'\\'</span> && i + 1 < len)</div><div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  i++;</div><div class="line"><a name="l00725"></a><span class="lineno"> 725</span>  *d++ = s[i];</div><div class="line"><a name="l00726"></a><span class="lineno"> 726</span>  }</div><div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  *d = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="keywordflow">return</span> 1;</div><div class="line"><a name="l00729"></a><span class="lineno"> 729</span> }</div><div class="line"><a name="l00730"></a><span class="lineno"> 730</span> </div><div class="line"><a name="l00731"></a><span class="lineno"> 731</span> <span class="comment">/* The kernel silently truncates the "data" argument to PAGE_SIZE-1 characters.</span></div><div class="line"><a name="l00732"></a><span class="lineno"> 732</span> <span class="comment"> * This can be dangerous if it e.g. truncates the option "group_id=1000" to</span></div><div class="line"><a name="l00733"></a><span class="lineno"> 733</span> <span class="comment"> * "group_id=1".</span></div><div class="line"><a name="l00734"></a><span class="lineno"> 734</span> <span class="comment"> * This wrapper detects this case and bails out with an error.</span></div><div class="line"><a name="l00735"></a><span class="lineno"> 735</span> <span class="comment"> */</span></div><div class="line"><a name="l00736"></a><span class="lineno"> 736</span> <span class="keyword">static</span> <span class="keywordtype">int</span> mount_notrunc(<span class="keyword">const</span> <span class="keywordtype">char</span> *source, <span class="keyword">const</span> <span class="keywordtype">char</span> *target,</div><div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *filesystemtype, <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> mountflags,</div><div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *data) {</div><div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  <span class="keywordflow">if</span> (strlen(data) > sysconf(_SC_PAGESIZE) - 1) {</div><div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  fprintf(stderr, <span class="stringliteral">"%s: mount options too long\n"</span>, progname);</div><div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  errno = EINVAL;</div><div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  }</div><div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  <span class="keywordflow">return</span> mount(source, target, filesystemtype, mountflags, data);</div><div class="line"><a name="l00745"></a><span class="lineno"> 745</span> }</div><div class="line"><a name="l00746"></a><span class="lineno"> 746</span> </div><div class="line"><a name="l00747"></a><span class="lineno"> 747</span> </div><div class="line"><a name="l00748"></a><span class="lineno"> 748</span> <span class="keyword">static</span> <span class="keywordtype">int</span> do_mount(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keyword">const</span> <span class="keywordtype">char</span> **typep, mode_t rootmode,</div><div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">char</span> *opts, <span class="keyword">const</span> <span class="keywordtype">char</span> *dev, <span class="keywordtype">char</span> **sourcep,</div><div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keywordtype">char</span> **mnt_optsp)</div><div class="line"><a name="l00751"></a><span class="lineno"> 751</span> {</div><div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00753"></a><span class="lineno"> 753</span>  <span class="keywordtype">int</span> flags = MS_NOSUID | MS_NODEV;</div><div class="line"><a name="l00754"></a><span class="lineno"> 754</span>  <span class="keywordtype">char</span> *optbuf;</div><div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <span class="keywordtype">char</span> *mnt_opts = NULL;</div><div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *s;</div><div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <span class="keywordtype">char</span> *d;</div><div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  <span class="keywordtype">char</span> *fsname = NULL;</div><div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <span class="keywordtype">char</span> *subtype = NULL;</div><div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keywordtype">char</span> *source = NULL;</div><div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <span class="keywordtype">char</span> *type = NULL;</div><div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <span class="keywordtype">int</span> blkdev = 0;</div><div class="line"><a name="l00763"></a><span class="lineno"> 763</span> </div><div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  optbuf = (<span class="keywordtype">char</span> *) malloc(strlen(opts) + 128);</div><div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <span class="keywordflow">if</span> (!optbuf) {</div><div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, progname);</div><div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00768"></a><span class="lineno"> 768</span>  }</div><div class="line"><a name="l00769"></a><span class="lineno"> 769</span> </div><div class="line"><a name="l00770"></a><span class="lineno"> 770</span>  <span class="keywordflow">for</span> (s = opts, d = optbuf; *s;) {</div><div class="line"><a name="l00771"></a><span class="lineno"> 771</span>  <span class="keywordtype">unsigned</span> len;</div><div class="line"><a name="l00772"></a><span class="lineno"> 772</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *fsname_str = <span class="stringliteral">"fsname="</span>;</div><div class="line"><a name="l00773"></a><span class="lineno"> 773</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *subtype_str = <span class="stringliteral">"subtype="</span>;</div><div class="line"><a name="l00774"></a><span class="lineno"> 774</span>  <span class="keywordtype">bool</span> escape_ok = begins_with(s, fsname_str) ||</div><div class="line"><a name="l00775"></a><span class="lineno"> 775</span>  begins_with(s, subtype_str);</div><div class="line"><a name="l00776"></a><span class="lineno"> 776</span>  <span class="keywordflow">for</span> (len = 0; s[len]; len++) {</div><div class="line"><a name="l00777"></a><span class="lineno"> 777</span>  <span class="keywordflow">if</span> (escape_ok && s[len] == <span class="charliteral">'\\'</span> && s[len + 1])</div><div class="line"><a name="l00778"></a><span class="lineno"> 778</span>  len++;</div><div class="line"><a name="l00779"></a><span class="lineno"> 779</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (s[len] == <span class="charliteral">','</span>)</div><div class="line"><a name="l00780"></a><span class="lineno"> 780</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l00781"></a><span class="lineno"> 781</span>  }</div><div class="line"><a name="l00782"></a><span class="lineno"> 782</span>  <span class="keywordflow">if</span> (begins_with(s, fsname_str)) {</div><div class="line"><a name="l00783"></a><span class="lineno"> 783</span>  <span class="keywordflow">if</span> (!get_string_opt(s, len, fsname_str, &fsname))</div><div class="line"><a name="l00784"></a><span class="lineno"> 784</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00785"></a><span class="lineno"> 785</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (begins_with(s, subtype_str)) {</div><div class="line"><a name="l00786"></a><span class="lineno"> 786</span>  <span class="keywordflow">if</span> (!get_string_opt(s, len, subtype_str, &subtype))</div><div class="line"><a name="l00787"></a><span class="lineno"> 787</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00788"></a><span class="lineno"> 788</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (opt_eq(s, len, <span class="stringliteral">"blkdev"</span>)) {</div><div class="line"><a name="l00789"></a><span class="lineno"> 789</span>  <span class="keywordflow">if</span> (getuid() != 0) {</div><div class="line"><a name="l00790"></a><span class="lineno"> 790</span>  fprintf(stderr,</div><div class="line"><a name="l00791"></a><span class="lineno"> 791</span>  <span class="stringliteral">"%s: option blkdev is privileged\n"</span>,</div><div class="line"><a name="l00792"></a><span class="lineno"> 792</span>  progname);</div><div class="line"><a name="l00793"></a><span class="lineno"> 793</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00794"></a><span class="lineno"> 794</span>  }</div><div class="line"><a name="l00795"></a><span class="lineno"> 795</span>  blkdev = 1;</div><div class="line"><a name="l00796"></a><span class="lineno"> 796</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (opt_eq(s, len, <span class="stringliteral">"auto_unmount"</span>)) {</div><div class="line"><a name="l00797"></a><span class="lineno"> 797</span>  auto_unmount = 1;</div><div class="line"><a name="l00798"></a><span class="lineno"> 798</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!begins_with(s, <span class="stringliteral">"fd="</span>) &&</div><div class="line"><a name="l00799"></a><span class="lineno"> 799</span>  !begins_with(s, <span class="stringliteral">"rootmode="</span>) &&</div><div class="line"><a name="l00800"></a><span class="lineno"> 800</span>  !begins_with(s, <span class="stringliteral">"user_id="</span>) &&</div><div class="line"><a name="l00801"></a><span class="lineno"> 801</span>  !begins_with(s, <span class="stringliteral">"group_id="</span>)) {</div><div class="line"><a name="l00802"></a><span class="lineno"> 802</span>  <span class="keywordtype">int</span> on;</div><div class="line"><a name="l00803"></a><span class="lineno"> 803</span>  <span class="keywordtype">int</span> flag;</div><div class="line"><a name="l00804"></a><span class="lineno"> 804</span>  <span class="keywordtype">int</span> skip_option = 0;</div><div class="line"><a name="l00805"></a><span class="lineno"> 805</span>  <span class="keywordflow">if</span> (opt_eq(s, len, <span class="stringliteral">"large_read"</span>)) {</div><div class="line"><a name="l00806"></a><span class="lineno"> 806</span>  <span class="keyword">struct </span>utsname utsname;</div><div class="line"><a name="l00807"></a><span class="lineno"> 807</span>  <span class="keywordtype">unsigned</span> kmaj, kmin;</div><div class="line"><a name="l00808"></a><span class="lineno"> 808</span>  res = uname(&utsname);</div><div class="line"><a name="l00809"></a><span class="lineno"> 809</span>  <span class="keywordflow">if</span> (res == 0 &&</div><div class="line"><a name="l00810"></a><span class="lineno"> 810</span>  sscanf(utsname.release, <span class="stringliteral">"%u.%u"</span>,</div><div class="line"><a name="l00811"></a><span class="lineno"> 811</span>  &kmaj, &kmin) == 2 &&</div><div class="line"><a name="l00812"></a><span class="lineno"> 812</span>  (kmaj > 2 || (kmaj == 2 && kmin > 4))) {</div><div class="line"><a name="l00813"></a><span class="lineno"> 813</span>  fprintf(stderr, <span class="stringliteral">"%s: note: 'large_read' mount option is deprecated for %i.%i kernels\n"</span>, progname, kmaj, kmin);</div><div class="line"><a name="l00814"></a><span class="lineno"> 814</span>  skip_option = 1;</div><div class="line"><a name="l00815"></a><span class="lineno"> 815</span>  }</div><div class="line"><a name="l00816"></a><span class="lineno"> 816</span>  }</div><div class="line"><a name="l00817"></a><span class="lineno"> 817</span>  <span class="keywordflow">if</span> (getuid() != 0 && !user_allow_other &&</div><div class="line"><a name="l00818"></a><span class="lineno"> 818</span>  (opt_eq(s, len, <span class="stringliteral">"allow_other"</span>) ||</div><div class="line"><a name="l00819"></a><span class="lineno"> 819</span>  opt_eq(s, len, <span class="stringliteral">"allow_root"</span>))) {</div><div class="line"><a name="l00820"></a><span class="lineno"> 820</span>  fprintf(stderr, <span class="stringliteral">"%s: option %.*s only allowed if 'user_allow_other' is set in %s\n"</span>, progname, len, s, FUSE_CONF);</div><div class="line"><a name="l00821"></a><span class="lineno"> 821</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00822"></a><span class="lineno"> 822</span>  }</div><div class="line"><a name="l00823"></a><span class="lineno"> 823</span>  <span class="keywordflow">if</span> (!skip_option) {</div><div class="line"><a name="l00824"></a><span class="lineno"> 824</span>  <span class="keywordflow">if</span> (find_mount_flag(s, len, &on, &flag)) {</div><div class="line"><a name="l00825"></a><span class="lineno"> 825</span>  <span class="keywordflow">if</span> (on)</div><div class="line"><a name="l00826"></a><span class="lineno"> 826</span>  flags |= flag;</div><div class="line"><a name="l00827"></a><span class="lineno"> 827</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00828"></a><span class="lineno"> 828</span>  flags &= ~flag;</div><div class="line"><a name="l00829"></a><span class="lineno"> 829</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (opt_eq(s, len, <span class="stringliteral">"default_permissions"</span>) ||</div><div class="line"><a name="l00830"></a><span class="lineno"> 830</span>  opt_eq(s, len, <span class="stringliteral">"allow_other"</span>) ||</div><div class="line"><a name="l00831"></a><span class="lineno"> 831</span>  begins_with(s, <span class="stringliteral">"max_read="</span>) ||</div><div class="line"><a name="l00832"></a><span class="lineno"> 832</span>  begins_with(s, <span class="stringliteral">"blksize="</span>)) {</div><div class="line"><a name="l00833"></a><span class="lineno"> 833</span>  memcpy(d, s, len);</div><div class="line"><a name="l00834"></a><span class="lineno"> 834</span>  d += len;</div><div class="line"><a name="l00835"></a><span class="lineno"> 835</span>  *d++ = <span class="charliteral">','</span>;</div><div class="line"><a name="l00836"></a><span class="lineno"> 836</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00837"></a><span class="lineno"> 837</span>  fprintf(stderr, <span class="stringliteral">"%s: unknown option '%.*s'\n"</span>, progname, len, s);</div><div class="line"><a name="l00838"></a><span class="lineno"> 838</span>  exit(1);</div><div class="line"><a name="l00839"></a><span class="lineno"> 839</span>  }</div><div class="line"><a name="l00840"></a><span class="lineno"> 840</span>  }</div><div class="line"><a name="l00841"></a><span class="lineno"> 841</span>  }</div><div class="line"><a name="l00842"></a><span class="lineno"> 842</span>  s += len;</div><div class="line"><a name="l00843"></a><span class="lineno"> 843</span>  <span class="keywordflow">if</span> (*s)</div><div class="line"><a name="l00844"></a><span class="lineno"> 844</span>  s++;</div><div class="line"><a name="l00845"></a><span class="lineno"> 845</span>  }</div><div class="line"><a name="l00846"></a><span class="lineno"> 846</span>  *d = <span class="charliteral">'\0'</span>;</div><div class="line"><a name="l00847"></a><span class="lineno"> 847</span>  res = get_mnt_opts(flags, optbuf, &mnt_opts);</div><div class="line"><a name="l00848"></a><span class="lineno"> 848</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l00849"></a><span class="lineno"> 849</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00850"></a><span class="lineno"> 850</span> </div><div class="line"><a name="l00851"></a><span class="lineno"> 851</span>  sprintf(d, <span class="stringliteral">"fd=%i,rootmode=%o,user_id=%u,group_id=%u"</span>,</div><div class="line"><a name="l00852"></a><span class="lineno"> 852</span>  fd, rootmode, getuid(), getgid());</div><div class="line"><a name="l00853"></a><span class="lineno"> 853</span> </div><div class="line"><a name="l00854"></a><span class="lineno"> 854</span>  source = malloc((fsname ? strlen(fsname) : 0) +</div><div class="line"><a name="l00855"></a><span class="lineno"> 855</span>  (subtype ? strlen(subtype) : 0) + strlen(dev) + 32);</div><div class="line"><a name="l00856"></a><span class="lineno"> 856</span> </div><div class="line"><a name="l00857"></a><span class="lineno"> 857</span>  type = malloc((subtype ? strlen(subtype) : 0) + 32);</div><div class="line"><a name="l00858"></a><span class="lineno"> 858</span>  <span class="keywordflow">if</span> (!type || !source) {</div><div class="line"><a name="l00859"></a><span class="lineno"> 859</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, progname);</div><div class="line"><a name="l00860"></a><span class="lineno"> 860</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00861"></a><span class="lineno"> 861</span>  }</div><div class="line"><a name="l00862"></a><span class="lineno"> 862</span> </div><div class="line"><a name="l00863"></a><span class="lineno"> 863</span>  <span class="keywordflow">if</span> (subtype)</div><div class="line"><a name="l00864"></a><span class="lineno"> 864</span>  sprintf(type, <span class="stringliteral">"%s.%s"</span>, blkdev ? <span class="stringliteral">"fuseblk"</span> : <span class="stringliteral">"fuse"</span>, subtype);</div><div class="line"><a name="l00865"></a><span class="lineno"> 865</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00866"></a><span class="lineno"> 866</span>  strcpy(type, blkdev ? <span class="stringliteral">"fuseblk"</span> : <span class="stringliteral">"fuse"</span>);</div><div class="line"><a name="l00867"></a><span class="lineno"> 867</span> </div><div class="line"><a name="l00868"></a><span class="lineno"> 868</span>  <span class="keywordflow">if</span> (fsname)</div><div class="line"><a name="l00869"></a><span class="lineno"> 869</span>  strcpy(source, fsname);</div><div class="line"><a name="l00870"></a><span class="lineno"> 870</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00871"></a><span class="lineno"> 871</span>  strcpy(source, subtype ? subtype : dev);</div><div class="line"><a name="l00872"></a><span class="lineno"> 872</span> </div><div class="line"><a name="l00873"></a><span class="lineno"> 873</span>  res = mount_notrunc(source, mnt, type, flags, optbuf);</div><div class="line"><a name="l00874"></a><span class="lineno"> 874</span>  <span class="keywordflow">if</span> (res == -1 && errno == ENODEV && subtype) {</div><div class="line"><a name="l00875"></a><span class="lineno"> 875</span>  <span class="comment">/* Probably missing subtype support */</span></div><div class="line"><a name="l00876"></a><span class="lineno"> 876</span>  strcpy(type, blkdev ? <span class="stringliteral">"fuseblk"</span> : <span class="stringliteral">"fuse"</span>);</div><div class="line"><a name="l00877"></a><span class="lineno"> 877</span>  <span class="keywordflow">if</span> (fsname) {</div><div class="line"><a name="l00878"></a><span class="lineno"> 878</span>  <span class="keywordflow">if</span> (!blkdev)</div><div class="line"><a name="l00879"></a><span class="lineno"> 879</span>  sprintf(source, <span class="stringliteral">"%s#%s"</span>, subtype, fsname);</div><div class="line"><a name="l00880"></a><span class="lineno"> 880</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00881"></a><span class="lineno"> 881</span>  strcpy(source, type);</div><div class="line"><a name="l00882"></a><span class="lineno"> 882</span>  }</div><div class="line"><a name="l00883"></a><span class="lineno"> 883</span> </div><div class="line"><a name="l00884"></a><span class="lineno"> 884</span>  res = mount_notrunc(source, mnt, type, flags, optbuf);</div><div class="line"><a name="l00885"></a><span class="lineno"> 885</span>  }</div><div class="line"><a name="l00886"></a><span class="lineno"> 886</span>  <span class="keywordflow">if</span> (res == -1 && errno == EINVAL) {</div><div class="line"><a name="l00887"></a><span class="lineno"> 887</span>  <span class="comment">/* It could be an old version not supporting group_id */</span></div><div class="line"><a name="l00888"></a><span class="lineno"> 888</span>  sprintf(d, <span class="stringliteral">"fd=%i,rootmode=%o,user_id=%u"</span>,</div><div class="line"><a name="l00889"></a><span class="lineno"> 889</span>  fd, rootmode, getuid());</div><div class="line"><a name="l00890"></a><span class="lineno"> 890</span>  res = mount_notrunc(source, mnt, type, flags, optbuf);</div><div class="line"><a name="l00891"></a><span class="lineno"> 891</span>  }</div><div class="line"><a name="l00892"></a><span class="lineno"> 892</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00893"></a><span class="lineno"> 893</span>  <span class="keywordtype">int</span> errno_save = errno;</div><div class="line"><a name="l00894"></a><span class="lineno"> 894</span>  <span class="keywordflow">if</span> (blkdev && errno == ENODEV && !fuse_mnt_check_fuseblk())</div><div class="line"><a name="l00895"></a><span class="lineno"> 895</span>  fprintf(stderr, <span class="stringliteral">"%s: 'fuseblk' support missing\n"</span>,</div><div class="line"><a name="l00896"></a><span class="lineno"> 896</span>  progname);</div><div class="line"><a name="l00897"></a><span class="lineno"> 897</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00898"></a><span class="lineno"> 898</span>  fprintf(stderr, <span class="stringliteral">"%s: mount failed: %s\n"</span>, progname,</div><div class="line"><a name="l00899"></a><span class="lineno"> 899</span>  strerror(errno_save));</div><div class="line"><a name="l00900"></a><span class="lineno"> 900</span>  <span class="keywordflow">goto</span> err;</div><div class="line"><a name="l00901"></a><span class="lineno"> 901</span>  }</div><div class="line"><a name="l00902"></a><span class="lineno"> 902</span>  *sourcep = source;</div><div class="line"><a name="l00903"></a><span class="lineno"> 903</span>  *typep = type;</div><div class="line"><a name="l00904"></a><span class="lineno"> 904</span>  *mnt_optsp = mnt_opts;</div><div class="line"><a name="l00905"></a><span class="lineno"> 905</span>  free(fsname);</div><div class="line"><a name="l00906"></a><span class="lineno"> 906</span>  free(optbuf);</div><div class="line"><a name="l00907"></a><span class="lineno"> 907</span> </div><div class="line"><a name="l00908"></a><span class="lineno"> 908</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00909"></a><span class="lineno"> 909</span> </div><div class="line"><a name="l00910"></a><span class="lineno"> 910</span> err:</div><div class="line"><a name="l00911"></a><span class="lineno"> 911</span>  free(fsname);</div><div class="line"><a name="l00912"></a><span class="lineno"> 912</span>  free(subtype);</div><div class="line"><a name="l00913"></a><span class="lineno"> 913</span>  free(source);</div><div class="line"><a name="l00914"></a><span class="lineno"> 914</span>  free(type);</div><div class="line"><a name="l00915"></a><span class="lineno"> 915</span>  free(mnt_opts);</div><div class="line"><a name="l00916"></a><span class="lineno"> 916</span>  free(optbuf);</div><div class="line"><a name="l00917"></a><span class="lineno"> 917</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00918"></a><span class="lineno"> 918</span> }</div><div class="line"><a name="l00919"></a><span class="lineno"> 919</span> </div><div class="line"><a name="l00920"></a><span class="lineno"> 920</span> <span class="keyword">static</span> <span class="keywordtype">int</span> check_perm(<span class="keyword">const</span> <span class="keywordtype">char</span> **mntp, <span class="keyword">struct</span> stat *stbuf, <span class="keywordtype">int</span> *mountpoint_fd)</div><div class="line"><a name="l00921"></a><span class="lineno"> 921</span> {</div><div class="line"><a name="l00922"></a><span class="lineno"> 922</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l00923"></a><span class="lineno"> 923</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *mnt = *mntp;</div><div class="line"><a name="l00924"></a><span class="lineno"> 924</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *origmnt = mnt;</div><div class="line"><a name="l00925"></a><span class="lineno"> 925</span>  <span class="keyword">struct </span>statfs fs_buf;</div><div class="line"><a name="l00926"></a><span class="lineno"> 926</span>  <span class="keywordtype">size_t</span> i;</div><div class="line"><a name="l00927"></a><span class="lineno"> 927</span> </div><div class="line"><a name="l00928"></a><span class="lineno"> 928</span>  res = lstat(mnt, stbuf);</div><div class="line"><a name="l00929"></a><span class="lineno"> 929</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00930"></a><span class="lineno"> 930</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to access mountpoint %s: %s\n"</span>,</div><div class="line"><a name="l00931"></a><span class="lineno"> 931</span>  progname, mnt, strerror(errno));</div><div class="line"><a name="l00932"></a><span class="lineno"> 932</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00933"></a><span class="lineno"> 933</span>  }</div><div class="line"><a name="l00934"></a><span class="lineno"> 934</span> </div><div class="line"><a name="l00935"></a><span class="lineno"> 935</span>  <span class="comment">/* No permission checking is done for root */</span></div><div class="line"><a name="l00936"></a><span class="lineno"> 936</span>  <span class="keywordflow">if</span> (getuid() == 0)</div><div class="line"><a name="l00937"></a><span class="lineno"> 937</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l00938"></a><span class="lineno"> 938</span> </div><div class="line"><a name="l00939"></a><span class="lineno"> 939</span>  <span class="keywordflow">if</span> (S_ISDIR(stbuf->st_mode)) {</div><div class="line"><a name="l00940"></a><span class="lineno"> 940</span>  res = chdir(mnt);</div><div class="line"><a name="l00941"></a><span class="lineno"> 941</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00942"></a><span class="lineno"> 942</span>  fprintf(stderr,</div><div class="line"><a name="l00943"></a><span class="lineno"> 943</span>  <span class="stringliteral">"%s: failed to chdir to mountpoint: %s\n"</span>,</div><div class="line"><a name="l00944"></a><span class="lineno"> 944</span>  progname, strerror(errno));</div><div class="line"><a name="l00945"></a><span class="lineno"> 945</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00946"></a><span class="lineno"> 946</span>  }</div><div class="line"><a name="l00947"></a><span class="lineno"> 947</span>  mnt = *mntp = <span class="stringliteral">"."</span>;</div><div class="line"><a name="l00948"></a><span class="lineno"> 948</span>  res = lstat(mnt, stbuf);</div><div class="line"><a name="l00949"></a><span class="lineno"> 949</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00950"></a><span class="lineno"> 950</span>  fprintf(stderr,</div><div class="line"><a name="l00951"></a><span class="lineno"> 951</span>  <span class="stringliteral">"%s: failed to access mountpoint %s: %s\n"</span>,</div><div class="line"><a name="l00952"></a><span class="lineno"> 952</span>  progname, origmnt, strerror(errno));</div><div class="line"><a name="l00953"></a><span class="lineno"> 953</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00954"></a><span class="lineno"> 954</span>  }</div><div class="line"><a name="l00955"></a><span class="lineno"> 955</span> </div><div class="line"><a name="l00956"></a><span class="lineno"> 956</span>  <span class="keywordflow">if</span> ((stbuf->st_mode & S_ISVTX) && stbuf->st_uid != getuid()) {</div><div class="line"><a name="l00957"></a><span class="lineno"> 957</span>  fprintf(stderr, <span class="stringliteral">"%s: mountpoint %s not owned by user\n"</span>,</div><div class="line"><a name="l00958"></a><span class="lineno"> 958</span>  progname, origmnt);</div><div class="line"><a name="l00959"></a><span class="lineno"> 959</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00960"></a><span class="lineno"> 960</span>  }</div><div class="line"><a name="l00961"></a><span class="lineno"> 961</span> </div><div class="line"><a name="l00962"></a><span class="lineno"> 962</span>  res = access(mnt, W_OK);</div><div class="line"><a name="l00963"></a><span class="lineno"> 963</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00964"></a><span class="lineno"> 964</span>  fprintf(stderr, <span class="stringliteral">"%s: user has no write access to mountpoint %s\n"</span>,</div><div class="line"><a name="l00965"></a><span class="lineno"> 965</span>  progname, origmnt);</div><div class="line"><a name="l00966"></a><span class="lineno"> 966</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00967"></a><span class="lineno"> 967</span>  }</div><div class="line"><a name="l00968"></a><span class="lineno"> 968</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (S_ISREG(stbuf->st_mode)) {</div><div class="line"><a name="l00969"></a><span class="lineno"> 969</span>  <span class="keyword">static</span> <span class="keywordtype">char</span> procfile[256];</div><div class="line"><a name="l00970"></a><span class="lineno"> 970</span>  *mountpoint_fd = open(mnt, O_WRONLY);</div><div class="line"><a name="l00971"></a><span class="lineno"> 971</span>  <span class="keywordflow">if</span> (*mountpoint_fd == -1) {</div><div class="line"><a name="l00972"></a><span class="lineno"> 972</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>,</div><div class="line"><a name="l00973"></a><span class="lineno"> 973</span>  progname, mnt, strerror(errno));</div><div class="line"><a name="l00974"></a><span class="lineno"> 974</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00975"></a><span class="lineno"> 975</span>  }</div><div class="line"><a name="l00976"></a><span class="lineno"> 976</span>  res = fstat(*mountpoint_fd, stbuf);</div><div class="line"><a name="l00977"></a><span class="lineno"> 977</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l00978"></a><span class="lineno"> 978</span>  fprintf(stderr,</div><div class="line"><a name="l00979"></a><span class="lineno"> 979</span>  <span class="stringliteral">"%s: failed to access mountpoint %s: %s\n"</span>,</div><div class="line"><a name="l00980"></a><span class="lineno"> 980</span>  progname, mnt, strerror(errno));</div><div class="line"><a name="l00981"></a><span class="lineno"> 981</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00982"></a><span class="lineno"> 982</span>  }</div><div class="line"><a name="l00983"></a><span class="lineno"> 983</span>  <span class="keywordflow">if</span> (!S_ISREG(stbuf->st_mode)) {</div><div class="line"><a name="l00984"></a><span class="lineno"> 984</span>  fprintf(stderr,</div><div class="line"><a name="l00985"></a><span class="lineno"> 985</span>  <span class="stringliteral">"%s: mountpoint %s is no longer a regular file\n"</span>,</div><div class="line"><a name="l00986"></a><span class="lineno"> 986</span>  progname, mnt);</div><div class="line"><a name="l00987"></a><span class="lineno"> 987</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00988"></a><span class="lineno"> 988</span>  }</div><div class="line"><a name="l00989"></a><span class="lineno"> 989</span> </div><div class="line"><a name="l00990"></a><span class="lineno"> 990</span>  sprintf(procfile, <span class="stringliteral">"/proc/self/fd/%i"</span>, *mountpoint_fd);</div><div class="line"><a name="l00991"></a><span class="lineno"> 991</span>  *mntp = procfile;</div><div class="line"><a name="l00992"></a><span class="lineno"> 992</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l00993"></a><span class="lineno"> 993</span>  fprintf(stderr,</div><div class="line"><a name="l00994"></a><span class="lineno"> 994</span>  <span class="stringliteral">"%s: mountpoint %s is not a directory or a regular file\n"</span>,</div><div class="line"><a name="l00995"></a><span class="lineno"> 995</span>  progname, mnt);</div><div class="line"><a name="l00996"></a><span class="lineno"> 996</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l00997"></a><span class="lineno"> 997</span>  }</div><div class="line"><a name="l00998"></a><span class="lineno"> 998</span> </div><div class="line"><a name="l00999"></a><span class="lineno"> 999</span>  <span class="comment">/* Do not permit mounting over anything in procfs - it has a couple</span></div><div class="line"><a name="l01000"></a><span class="lineno"> 1000</span> <span class="comment"> * places to which we have "write access" without being supposed to be</span></div><div class="line"><a name="l01001"></a><span class="lineno"> 1001</span> <span class="comment"> * able to just put anything we want there.</span></div><div class="line"><a name="l01002"></a><span class="lineno"> 1002</span> <span class="comment"> * Luckily, without allow_other, we can't get other users to actually</span></div><div class="line"><a name="l01003"></a><span class="lineno"> 1003</span> <span class="comment"> * use any fake information we try to put there anyway.</span></div><div class="line"><a name="l01004"></a><span class="lineno"> 1004</span> <span class="comment"> * Use a whitelist to be safe. */</span></div><div class="line"><a name="l01005"></a><span class="lineno"> 1005</span>  <span class="keywordflow">if</span> (statfs(*mntp, &fs_buf)) {</div><div class="line"><a name="l01006"></a><span class="lineno"> 1006</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to access mountpoint %s: %s\n"</span>,</div><div class="line"><a name="l01007"></a><span class="lineno"> 1007</span>  progname, mnt, strerror(errno));</div><div class="line"><a name="l01008"></a><span class="lineno"> 1008</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l01009"></a><span class="lineno"> 1009</span>  }</div><div class="line"><a name="l01010"></a><span class="lineno"> 1010</span> </div><div class="line"><a name="l01011"></a><span class="lineno"> 1011</span>  <span class="comment">/* Define permitted filesystems for the mount target. This was</span></div><div class="line"><a name="l01012"></a><span class="lineno"> 1012</span> <span class="comment"> * originally the same list as used by the ecryptfs mount helper</span></div><div class="line"><a name="l01013"></a><span class="lineno"> 1013</span> <span class="comment"> * (https://bazaar.launchpad.net/~ecryptfs/ecryptfs/trunk/view/head:/src/utils/mount.ecryptfs_private.c#L225)</span></div><div class="line"><a name="l01014"></a><span class="lineno"> 1014</span> <span class="comment"> * but got expanded as we found more filesystems that needed to be</span></div><div class="line"><a name="l01015"></a><span class="lineno"> 1015</span> <span class="comment"> * overlayed. */</span></div><div class="line"><a name="l01016"></a><span class="lineno"> 1016</span>  typeof(fs_buf.f_type) f_type_whitelist[] = {</div><div class="line"><a name="l01017"></a><span class="lineno"> 1017</span>  0x61756673 <span class="comment">/* AUFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01018"></a><span class="lineno"> 1018</span>  0x00000187 <span class="comment">/* AUTOFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01019"></a><span class="lineno"> 1019</span>  0xCA451A4E <span class="comment">/* BCACHEFS_STATFS_MAGIC */</span>,</div><div class="line"><a name="l01020"></a><span class="lineno"> 1020</span>  0x9123683E <span class="comment">/* BTRFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01021"></a><span class="lineno"> 1021</span>  0x00C36400 <span class="comment">/* CEPH_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01022"></a><span class="lineno"> 1022</span>  0xFF534D42 <span class="comment">/* CIFS_MAGIC_NUMBER */</span>,</div><div class="line"><a name="l01023"></a><span class="lineno"> 1023</span>  0x0000F15F <span class="comment">/* ECRYPTFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01024"></a><span class="lineno"> 1024</span>  0x0000EF53 <span class="comment">/* EXT[234]_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01025"></a><span class="lineno"> 1025</span>  0xF2F52010 <span class="comment">/* F2FS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01026"></a><span class="lineno"> 1026</span>  0x65735546 <span class="comment">/* FUSE_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01027"></a><span class="lineno"> 1027</span>  0x01161970 <span class="comment">/* GFS2_MAGIC */</span>,</div><div class="line"><a name="l01028"></a><span class="lineno"> 1028</span>  0x47504653 <span class="comment">/* GPFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01029"></a><span class="lineno"> 1029</span>  0x0000482b <span class="comment">/* HFSPLUS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01030"></a><span class="lineno"> 1030</span>  0x000072B6 <span class="comment">/* JFFS2_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01031"></a><span class="lineno"> 1031</span>  0x3153464A <span class="comment">/* JFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01032"></a><span class="lineno"> 1032</span>  0x0BD00BD0 <span class="comment">/* LL_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01033"></a><span class="lineno"> 1033</span>  0X00004D44 <span class="comment">/* MSDOS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01034"></a><span class="lineno"> 1034</span>  0x0000564C <span class="comment">/* NCP_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01035"></a><span class="lineno"> 1035</span>  0x00006969 <span class="comment">/* NFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01036"></a><span class="lineno"> 1036</span>  0x00003434 <span class="comment">/* NILFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01037"></a><span class="lineno"> 1037</span>  0x5346544E <span class="comment">/* NTFS_SB_MAGIC */</span>,</div><div class="line"><a name="l01038"></a><span class="lineno"> 1038</span>  0x5346414f <span class="comment">/* OPENAFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01039"></a><span class="lineno"> 1039</span>  0x794C7630 <span class="comment">/* OVERLAYFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01040"></a><span class="lineno"> 1040</span>  0x52654973 <span class="comment">/* REISERFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01041"></a><span class="lineno"> 1041</span>  0xFE534D42 <span class="comment">/* SMB2_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01042"></a><span class="lineno"> 1042</span>  0x73717368 <span class="comment">/* SQUASHFS_MAGIC */</span>,</div><div class="line"><a name="l01043"></a><span class="lineno"> 1043</span>  0x01021994 <span class="comment">/* TMPFS_MAGIC */</span>,</div><div class="line"><a name="l01044"></a><span class="lineno"> 1044</span>  0x24051905 <span class="comment">/* UBIFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01045"></a><span class="lineno"> 1045</span>  0x736675005346544e <span class="comment">/* UFSD */</span>,</div><div class="line"><a name="l01046"></a><span class="lineno"> 1046</span>  0x58465342 <span class="comment">/* XFS_SB_MAGIC */</span>,</div><div class="line"><a name="l01047"></a><span class="lineno"> 1047</span>  0x2FC12FC1 <span class="comment">/* ZFS_SUPER_MAGIC */</span>,</div><div class="line"><a name="l01048"></a><span class="lineno"> 1048</span>  };</div><div class="line"><a name="l01049"></a><span class="lineno"> 1049</span>  <span class="keywordflow">for</span> (i = 0; i < <span class="keyword">sizeof</span>(f_type_whitelist)/<span class="keyword">sizeof</span>(f_type_whitelist[0]); i++) {</div><div class="line"><a name="l01050"></a><span class="lineno"> 1050</span>  <span class="keywordflow">if</span> (f_type_whitelist[i] == fs_buf.f_type)</div><div class="line"><a name="l01051"></a><span class="lineno"> 1051</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l01052"></a><span class="lineno"> 1052</span>  }</div><div class="line"><a name="l01053"></a><span class="lineno"> 1053</span> </div><div class="line"><a name="l01054"></a><span class="lineno"> 1054</span>  fprintf(stderr, <span class="stringliteral">"%s: mounting over filesystem type %#010lx is forbidden\n"</span>,</div><div class="line"><a name="l01055"></a><span class="lineno"> 1055</span>  progname, (<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span>)fs_buf.f_type);</div><div class="line"><a name="l01056"></a><span class="lineno"> 1056</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l01057"></a><span class="lineno"> 1057</span> }</div><div class="line"><a name="l01058"></a><span class="lineno"> 1058</span> </div><div class="line"><a name="l01059"></a><span class="lineno"> 1059</span> <span class="keyword">static</span> <span class="keywordtype">int</span> try_open(<span class="keyword">const</span> <span class="keywordtype">char</span> *dev, <span class="keywordtype">char</span> **devp, <span class="keywordtype">int</span> silent)</div><div class="line"><a name="l01060"></a><span class="lineno"> 1060</span> {</div><div class="line"><a name="l01061"></a><span class="lineno"> 1061</span>  <span class="keywordtype">int</span> fd = open(dev, O_RDWR);</div><div class="line"><a name="l01062"></a><span class="lineno"> 1062</span>  <span class="keywordflow">if</span> (fd != -1) {</div><div class="line"><a name="l01063"></a><span class="lineno"> 1063</span>  *devp = strdup(dev);</div><div class="line"><a name="l01064"></a><span class="lineno"> 1064</span>  <span class="keywordflow">if</span> (*devp == NULL) {</div><div class="line"><a name="l01065"></a><span class="lineno"> 1065</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>,</div><div class="line"><a name="l01066"></a><span class="lineno"> 1066</span>  progname);</div><div class="line"><a name="l01067"></a><span class="lineno"> 1067</span>  close(fd);</div><div class="line"><a name="l01068"></a><span class="lineno"> 1068</span>  fd = -1;</div><div class="line"><a name="l01069"></a><span class="lineno"> 1069</span>  }</div><div class="line"><a name="l01070"></a><span class="lineno"> 1070</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (errno == ENODEV ||</div><div class="line"><a name="l01071"></a><span class="lineno"> 1071</span>  errno == ENOENT)<span class="comment">/* check for ENOENT too, for the udev case */</span></div><div class="line"><a name="l01072"></a><span class="lineno"> 1072</span>  <span class="keywordflow">return</span> -2;</div><div class="line"><a name="l01073"></a><span class="lineno"> 1073</span>  <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!silent) {</div><div class="line"><a name="l01074"></a><span class="lineno"> 1074</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to open %s: %s\n"</span>, progname, dev,</div><div class="line"><a name="l01075"></a><span class="lineno"> 1075</span>  strerror(errno));</div><div class="line"><a name="l01076"></a><span class="lineno"> 1076</span>  }</div><div class="line"><a name="l01077"></a><span class="lineno"> 1077</span>  <span class="keywordflow">return</span> fd;</div><div class="line"><a name="l01078"></a><span class="lineno"> 1078</span> }</div><div class="line"><a name="l01079"></a><span class="lineno"> 1079</span> </div><div class="line"><a name="l01080"></a><span class="lineno"> 1080</span> <span class="keyword">static</span> <span class="keywordtype">int</span> try_open_fuse_device(<span class="keywordtype">char</span> **devp)</div><div class="line"><a name="l01081"></a><span class="lineno"> 1081</span> {</div><div class="line"><a name="l01082"></a><span class="lineno"> 1082</span>  <span class="keywordtype">int</span> fd;</div><div class="line"><a name="l01083"></a><span class="lineno"> 1083</span> </div><div class="line"><a name="l01084"></a><span class="lineno"> 1084</span>  drop_privs();</div><div class="line"><a name="l01085"></a><span class="lineno"> 1085</span>  fd = try_open(FUSE_DEV, devp, 0);</div><div class="line"><a name="l01086"></a><span class="lineno"> 1086</span>  restore_privs();</div><div class="line"><a name="l01087"></a><span class="lineno"> 1087</span>  <span class="keywordflow">return</span> fd;</div><div class="line"><a name="l01088"></a><span class="lineno"> 1088</span> }</div><div class="line"><a name="l01089"></a><span class="lineno"> 1089</span> </div><div class="line"><a name="l01090"></a><span class="lineno"> 1090</span> <span class="keyword">static</span> <span class="keywordtype">int</span> open_fuse_device(<span class="keywordtype">char</span> **devp)</div><div class="line"><a name="l01091"></a><span class="lineno"> 1091</span> {</div><div class="line"><a name="l01092"></a><span class="lineno"> 1092</span>  <span class="keywordtype">int</span> fd = try_open_fuse_device(devp);</div><div class="line"><a name="l01093"></a><span class="lineno"> 1093</span>  <span class="keywordflow">if</span> (fd >= -1)</div><div class="line"><a name="l01094"></a><span class="lineno"> 1094</span>  <span class="keywordflow">return</span> fd;</div><div class="line"><a name="l01095"></a><span class="lineno"> 1095</span> </div><div class="line"><a name="l01096"></a><span class="lineno"> 1096</span>  fprintf(stderr,</div><div class="line"><a name="l01097"></a><span class="lineno"> 1097</span>  <span class="stringliteral">"%s: fuse device not found, try 'modprobe fuse' first\n"</span>,</div><div class="line"><a name="l01098"></a><span class="lineno"> 1098</span>  progname);</div><div class="line"><a name="l01099"></a><span class="lineno"> 1099</span> </div><div class="line"><a name="l01100"></a><span class="lineno"> 1100</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l01101"></a><span class="lineno"> 1101</span> }</div><div class="line"><a name="l01102"></a><span class="lineno"> 1102</span> </div><div class="line"><a name="l01103"></a><span class="lineno"> 1103</span> </div><div class="line"><a name="l01104"></a><span class="lineno"> 1104</span> <span class="keyword">static</span> <span class="keywordtype">int</span> mount_fuse(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keyword">const</span> <span class="keywordtype">char</span> *opts, <span class="keyword">const</span> <span class="keywordtype">char</span> **type)</div><div class="line"><a name="l01105"></a><span class="lineno"> 1105</span> {</div><div class="line"><a name="l01106"></a><span class="lineno"> 1106</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l01107"></a><span class="lineno"> 1107</span>  <span class="keywordtype">int</span> fd;</div><div class="line"><a name="l01108"></a><span class="lineno"> 1108</span>  <span class="keywordtype">char</span> *dev;</div><div class="line"><a name="l01109"></a><span class="lineno"> 1109</span>  <span class="keyword">struct </span>stat stbuf;</div><div class="line"><a name="l01110"></a><span class="lineno"> 1110</span>  <span class="keywordtype">char</span> *source = NULL;</div><div class="line"><a name="l01111"></a><span class="lineno"> 1111</span>  <span class="keywordtype">char</span> *mnt_opts = NULL;</div><div class="line"><a name="l01112"></a><span class="lineno"> 1112</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *real_mnt = mnt;</div><div class="line"><a name="l01113"></a><span class="lineno"> 1113</span>  <span class="keywordtype">int</span> mountpoint_fd = -1;</div><div class="line"><a name="l01114"></a><span class="lineno"> 1114</span> </div><div class="line"><a name="l01115"></a><span class="lineno"> 1115</span>  fd = open_fuse_device(&dev);</div><div class="line"><a name="l01116"></a><span class="lineno"> 1116</span>  <span class="keywordflow">if</span> (fd == -1)</div><div class="line"><a name="l01117"></a><span class="lineno"> 1117</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l01118"></a><span class="lineno"> 1118</span> </div><div class="line"><a name="l01119"></a><span class="lineno"> 1119</span>  drop_privs();</div><div class="line"><a name="l01120"></a><span class="lineno"> 1120</span>  read_conf();</div><div class="line"><a name="l01121"></a><span class="lineno"> 1121</span> </div><div class="line"><a name="l01122"></a><span class="lineno"> 1122</span>  <span class="keywordflow">if</span> (getuid() != 0 && mount_max != -1) {</div><div class="line"><a name="l01123"></a><span class="lineno"> 1123</span>  <span class="keywordtype">int</span> mount_count = count_fuse_fs();</div><div class="line"><a name="l01124"></a><span class="lineno"> 1124</span>  <span class="keywordflow">if</span> (mount_count >= mount_max) {</div><div class="line"><a name="l01125"></a><span class="lineno"> 1125</span>  fprintf(stderr, <span class="stringliteral">"%s: too many FUSE filesystems mounted; mount_max=N can be set in %s\n"</span>, progname, FUSE_CONF);</div><div class="line"><a name="l01126"></a><span class="lineno"> 1126</span>  <span class="keywordflow">goto</span> fail_close_fd;</div><div class="line"><a name="l01127"></a><span class="lineno"> 1127</span>  }</div><div class="line"><a name="l01128"></a><span class="lineno"> 1128</span>  }</div><div class="line"><a name="l01129"></a><span class="lineno"> 1129</span> </div><div class="line"><a name="l01130"></a><span class="lineno"> 1130</span>  res = check_perm(&real_mnt, &stbuf, &mountpoint_fd);</div><div class="line"><a name="l01131"></a><span class="lineno"> 1131</span>  restore_privs();</div><div class="line"><a name="l01132"></a><span class="lineno"> 1132</span>  <span class="keywordflow">if</span> (res != -1)</div><div class="line"><a name="l01133"></a><span class="lineno"> 1133</span>  res = do_mount(real_mnt, type, stbuf.st_mode & S_IFMT,</div><div class="line"><a name="l01134"></a><span class="lineno"> 1134</span>  fd, opts, dev, &source, &mnt_opts);</div><div class="line"><a name="l01135"></a><span class="lineno"> 1135</span> </div><div class="line"><a name="l01136"></a><span class="lineno"> 1136</span>  <span class="keywordflow">if</span> (mountpoint_fd != -1)</div><div class="line"><a name="l01137"></a><span class="lineno"> 1137</span>  close(mountpoint_fd);</div><div class="line"><a name="l01138"></a><span class="lineno"> 1138</span> </div><div class="line"><a name="l01139"></a><span class="lineno"> 1139</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l01140"></a><span class="lineno"> 1140</span>  <span class="keywordflow">goto</span> fail_close_fd;</div><div class="line"><a name="l01141"></a><span class="lineno"> 1141</span> </div><div class="line"><a name="l01142"></a><span class="lineno"> 1142</span>  res = chdir(<span class="stringliteral">"/"</span>);</div><div class="line"><a name="l01143"></a><span class="lineno"> 1143</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l01144"></a><span class="lineno"> 1144</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to chdir to '/'\n"</span>, progname);</div><div class="line"><a name="l01145"></a><span class="lineno"> 1145</span>  <span class="keywordflow">goto</span> fail_close_fd;</div><div class="line"><a name="l01146"></a><span class="lineno"> 1146</span>  }</div><div class="line"><a name="l01147"></a><span class="lineno"> 1147</span> </div><div class="line"><a name="l01148"></a><span class="lineno"> 1148</span>  <span class="keywordflow">if</span> (geteuid() == 0) {</div><div class="line"><a name="l01149"></a><span class="lineno"> 1149</span>  res = add_mount(source, mnt, *type, mnt_opts);</div><div class="line"><a name="l01150"></a><span class="lineno"> 1150</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l01151"></a><span class="lineno"> 1151</span>  <span class="comment">/* Can't clean up mount in a non-racy way */</span></div><div class="line"><a name="l01152"></a><span class="lineno"> 1152</span>  <span class="keywordflow">goto</span> fail_close_fd;</div><div class="line"><a name="l01153"></a><span class="lineno"> 1153</span>  }</div><div class="line"><a name="l01154"></a><span class="lineno"> 1154</span>  }</div><div class="line"><a name="l01155"></a><span class="lineno"> 1155</span> </div><div class="line"><a name="l01156"></a><span class="lineno"> 1156</span> out_free:</div><div class="line"><a name="l01157"></a><span class="lineno"> 1157</span>  free(source);</div><div class="line"><a name="l01158"></a><span class="lineno"> 1158</span>  free(mnt_opts);</div><div class="line"><a name="l01159"></a><span class="lineno"> 1159</span>  free(dev);</div><div class="line"><a name="l01160"></a><span class="lineno"> 1160</span> </div><div class="line"><a name="l01161"></a><span class="lineno"> 1161</span>  <span class="keywordflow">return</span> fd;</div><div class="line"><a name="l01162"></a><span class="lineno"> 1162</span> </div><div class="line"><a name="l01163"></a><span class="lineno"> 1163</span> fail_close_fd:</div><div class="line"><a name="l01164"></a><span class="lineno"> 1164</span>  close(fd);</div><div class="line"><a name="l01165"></a><span class="lineno"> 1165</span>  fd = -1;</div><div class="line"><a name="l01166"></a><span class="lineno"> 1166</span>  <span class="keywordflow">goto</span> out_free;</div><div class="line"><a name="l01167"></a><span class="lineno"> 1167</span> }</div><div class="line"><a name="l01168"></a><span class="lineno"> 1168</span> </div><div class="line"><a name="l01169"></a><span class="lineno"> 1169</span> <span class="keyword">static</span> <span class="keywordtype">int</span> send_fd(<span class="keywordtype">int</span> sock_fd, <span class="keywordtype">int</span> fd)</div><div class="line"><a name="l01170"></a><span class="lineno"> 1170</span> {</div><div class="line"><a name="l01171"></a><span class="lineno"> 1171</span>  <span class="keywordtype">int</span> retval;</div><div class="line"><a name="l01172"></a><span class="lineno"> 1172</span>  <span class="keyword">struct </span>msghdr msg;</div><div class="line"><a name="l01173"></a><span class="lineno"> 1173</span>  <span class="keyword">struct </span>cmsghdr *p_cmsg;</div><div class="line"><a name="l01174"></a><span class="lineno"> 1174</span>  <span class="keyword">struct </span>iovec vec;</div><div class="line"><a name="l01175"></a><span class="lineno"> 1175</span>  <span class="keywordtype">size_t</span> cmsgbuf[CMSG_SPACE(<span class="keyword">sizeof</span>(fd)) / <span class="keyword">sizeof</span>(size_t)];</div><div class="line"><a name="l01176"></a><span class="lineno"> 1176</span>  <span class="keywordtype">int</span> *p_fds;</div><div class="line"><a name="l01177"></a><span class="lineno"> 1177</span>  <span class="keywordtype">char</span> sendchar = 0;</div><div class="line"><a name="l01178"></a><span class="lineno"> 1178</span> </div><div class="line"><a name="l01179"></a><span class="lineno"> 1179</span>  msg.msg_control = cmsgbuf;</div><div class="line"><a name="l01180"></a><span class="lineno"> 1180</span>  msg.msg_controllen = <span class="keyword">sizeof</span>(cmsgbuf);</div><div class="line"><a name="l01181"></a><span class="lineno"> 1181</span>  p_cmsg = CMSG_FIRSTHDR(&msg);</div><div class="line"><a name="l01182"></a><span class="lineno"> 1182</span>  p_cmsg->cmsg_level = SOL_SOCKET;</div><div class="line"><a name="l01183"></a><span class="lineno"> 1183</span>  p_cmsg->cmsg_type = SCM_RIGHTS;</div><div class="line"><a name="l01184"></a><span class="lineno"> 1184</span>  p_cmsg->cmsg_len = CMSG_LEN(<span class="keyword">sizeof</span>(fd));</div><div class="line"><a name="l01185"></a><span class="lineno"> 1185</span>  p_fds = (<span class="keywordtype">int</span> *) CMSG_DATA(p_cmsg);</div><div class="line"><a name="l01186"></a><span class="lineno"> 1186</span>  *p_fds = fd;</div><div class="line"><a name="l01187"></a><span class="lineno"> 1187</span>  msg.msg_controllen = p_cmsg->cmsg_len;</div><div class="line"><a name="l01188"></a><span class="lineno"> 1188</span>  msg.msg_name = NULL;</div><div class="line"><a name="l01189"></a><span class="lineno"> 1189</span>  msg.msg_namelen = 0;</div><div class="line"><a name="l01190"></a><span class="lineno"> 1190</span>  msg.msg_iov = &vec;</div><div class="line"><a name="l01191"></a><span class="lineno"> 1191</span>  msg.msg_iovlen = 1;</div><div class="line"><a name="l01192"></a><span class="lineno"> 1192</span>  msg.msg_flags = 0;</div><div class="line"><a name="l01193"></a><span class="lineno"> 1193</span>  <span class="comment">/* "To pass file descriptors or credentials you need to send/read at</span></div><div class="line"><a name="l01194"></a><span class="lineno"> 1194</span> <span class="comment"> * least one byte" (man 7 unix) */</span></div><div class="line"><a name="l01195"></a><span class="lineno"> 1195</span>  vec.iov_base = &sendchar;</div><div class="line"><a name="l01196"></a><span class="lineno"> 1196</span>  vec.iov_len = <span class="keyword">sizeof</span>(sendchar);</div><div class="line"><a name="l01197"></a><span class="lineno"> 1197</span>  <span class="keywordflow">while</span> ((retval = sendmsg(sock_fd, &msg, 0)) == -1 && errno == EINTR);</div><div class="line"><a name="l01198"></a><span class="lineno"> 1198</span>  <span class="keywordflow">if</span> (retval != 1) {</div><div class="line"><a name="l01199"></a><span class="lineno"> 1199</span>  perror(<span class="stringliteral">"sending file descriptor"</span>);</div><div class="line"><a name="l01200"></a><span class="lineno"> 1200</span>  <span class="keywordflow">return</span> -1;</div><div class="line"><a name="l01201"></a><span class="lineno"> 1201</span>  }</div><div class="line"><a name="l01202"></a><span class="lineno"> 1202</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l01203"></a><span class="lineno"> 1203</span> }</div><div class="line"><a name="l01204"></a><span class="lineno"> 1204</span> </div><div class="line"><a name="l01205"></a><span class="lineno"> 1205</span> <span class="comment">/* The parent fuse process has died: decide whether to auto_unmount.</span></div><div class="line"><a name="l01206"></a><span class="lineno"> 1206</span> <span class="comment"> *</span></div><div class="line"><a name="l01207"></a><span class="lineno"> 1207</span> <span class="comment"> * In the normal case (umount or fusermount -u), the filesystem</span></div><div class="line"><a name="l01208"></a><span class="lineno"> 1208</span> <span class="comment"> * has already been unmounted. If we simply unmount again we can</span></div><div class="line"><a name="l01209"></a><span class="lineno"> 1209</span> <span class="comment"> * cause problems with stacked mounts (e.g. autofs).</span></div><div class="line"><a name="l01210"></a><span class="lineno"> 1210</span> <span class="comment"> *</span></div><div class="line"><a name="l01211"></a><span class="lineno"> 1211</span> <span class="comment"> * So we unmount here only in abnormal case where fuse process has</span></div><div class="line"><a name="l01212"></a><span class="lineno"> 1212</span> <span class="comment"> * died without unmount happening. To detect this, we first look in</span></div><div class="line"><a name="l01213"></a><span class="lineno"> 1213</span> <span class="comment"> * the mount table to make sure the mountpoint is still mounted and</span></div><div class="line"><a name="l01214"></a><span class="lineno"> 1214</span> <span class="comment"> * has proper type. If so, we then see if opening the mount dir is</span></div><div class="line"><a name="l01215"></a><span class="lineno"> 1215</span> <span class="comment"> * returning 'Transport endpoint is not connected'.</span></div><div class="line"><a name="l01216"></a><span class="lineno"> 1216</span> <span class="comment"> *</span></div><div class="line"><a name="l01217"></a><span class="lineno"> 1217</span> <span class="comment"> * The order of these is important, because if autofs is in use,</span></div><div class="line"><a name="l01218"></a><span class="lineno"> 1218</span> <span class="comment"> * opening the dir to check for ENOTCONN will cause a new mount</span></div><div class="line"><a name="l01219"></a><span class="lineno"> 1219</span> <span class="comment"> * in the normal case where filesystem has been unmounted cleanly.</span></div><div class="line"><a name="l01220"></a><span class="lineno"> 1220</span> <span class="comment"> */</span></div><div class="line"><a name="l01221"></a><span class="lineno"> 1221</span> <span class="keyword">static</span> <span class="keywordtype">int</span> should_auto_unmount(<span class="keyword">const</span> <span class="keywordtype">char</span> *mnt, <span class="keyword">const</span> <span class="keywordtype">char</span> *type)</div><div class="line"><a name="l01222"></a><span class="lineno"> 1222</span> {</div><div class="line"><a name="l01223"></a><span class="lineno"> 1223</span>  <span class="keywordtype">char</span> *copy;</div><div class="line"><a name="l01224"></a><span class="lineno"> 1224</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *last;</div><div class="line"><a name="l01225"></a><span class="lineno"> 1225</span>  <span class="keywordtype">int</span> result = 0;</div><div class="line"><a name="l01226"></a><span class="lineno"> 1226</span>  <span class="keywordtype">int</span> fd;</div><div class="line"><a name="l01227"></a><span class="lineno"> 1227</span> </div><div class="line"><a name="l01228"></a><span class="lineno"> 1228</span>  copy = strdup(mnt);</div><div class="line"><a name="l01229"></a><span class="lineno"> 1229</span>  <span class="keywordflow">if</span> (copy == NULL) {</div><div class="line"><a name="l01230"></a><span class="lineno"> 1230</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, progname);</div><div class="line"><a name="l01231"></a><span class="lineno"> 1231</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l01232"></a><span class="lineno"> 1232</span>  }</div><div class="line"><a name="l01233"></a><span class="lineno"> 1233</span> </div><div class="line"><a name="l01234"></a><span class="lineno"> 1234</span>  <span class="keywordflow">if</span> (chdir_to_parent(copy, &last) == -1)</div><div class="line"><a name="l01235"></a><span class="lineno"> 1235</span>  <span class="keywordflow">goto</span> out;</div><div class="line"><a name="l01236"></a><span class="lineno"> 1236</span>  <span class="keywordflow">if</span> (check_is_mount(last, mnt, type) == -1)</div><div class="line"><a name="l01237"></a><span class="lineno"> 1237</span>  <span class="keywordflow">goto</span> out;</div><div class="line"><a name="l01238"></a><span class="lineno"> 1238</span> </div><div class="line"><a name="l01239"></a><span class="lineno"> 1239</span>  fd = open(mnt, O_RDONLY);</div><div class="line"><a name="l01240"></a><span class="lineno"> 1240</span>  <span class="keywordflow">if</span> (fd != -1) {</div><div class="line"><a name="l01241"></a><span class="lineno"> 1241</span>  close(fd);</div><div class="line"><a name="l01242"></a><span class="lineno"> 1242</span>  } <span class="keywordflow">else</span> {</div><div class="line"><a name="l01243"></a><span class="lineno"> 1243</span>  result = errno == ENOTCONN;</div><div class="line"><a name="l01244"></a><span class="lineno"> 1244</span>  }</div><div class="line"><a name="l01245"></a><span class="lineno"> 1245</span> out:</div><div class="line"><a name="l01246"></a><span class="lineno"> 1246</span>  free(copy);</div><div class="line"><a name="l01247"></a><span class="lineno"> 1247</span>  <span class="keywordflow">return</span> result;</div><div class="line"><a name="l01248"></a><span class="lineno"> 1248</span> }</div><div class="line"><a name="l01249"></a><span class="lineno"> 1249</span> </div><div class="line"><a name="l01250"></a><span class="lineno"> 1250</span> <span class="keyword">static</span> <span class="keywordtype">void</span> usage(<span class="keywordtype">void</span>)</div><div class="line"><a name="l01251"></a><span class="lineno"> 1251</span> {</div><div class="line"><a name="l01252"></a><span class="lineno"> 1252</span>  printf(<span class="stringliteral">"%s: [options] mountpoint\n"</span></div><div class="line"><a name="l01253"></a><span class="lineno"> 1253</span>  <span class="stringliteral">"Options:\n"</span></div><div class="line"><a name="l01254"></a><span class="lineno"> 1254</span>  <span class="stringliteral">" -h print help\n"</span></div><div class="line"><a name="l01255"></a><span class="lineno"> 1255</span>  <span class="stringliteral">" -V print version\n"</span></div><div class="line"><a name="l01256"></a><span class="lineno"> 1256</span>  <span class="stringliteral">" -o opt[,opt...] mount options\n"</span></div><div class="line"><a name="l01257"></a><span class="lineno"> 1257</span>  <span class="stringliteral">" -u unmount\n"</span></div><div class="line"><a name="l01258"></a><span class="lineno"> 1258</span>  <span class="stringliteral">" -q quiet\n"</span></div><div class="line"><a name="l01259"></a><span class="lineno"> 1259</span>  <span class="stringliteral">" -z lazy unmount\n"</span>,</div><div class="line"><a name="l01260"></a><span class="lineno"> 1260</span>  progname);</div><div class="line"><a name="l01261"></a><span class="lineno"> 1261</span>  exit(1);</div><div class="line"><a name="l01262"></a><span class="lineno"> 1262</span> }</div><div class="line"><a name="l01263"></a><span class="lineno"> 1263</span> </div><div class="line"><a name="l01264"></a><span class="lineno"> 1264</span> <span class="keyword">static</span> <span class="keywordtype">void</span> show_version(<span class="keywordtype">void</span>)</div><div class="line"><a name="l01265"></a><span class="lineno"> 1265</span> {</div><div class="line"><a name="l01266"></a><span class="lineno"> 1266</span>  printf(<span class="stringliteral">"fusermount3 version: %s\n"</span>, PACKAGE_VERSION);</div><div class="line"><a name="l01267"></a><span class="lineno"> 1267</span>  exit(0);</div><div class="line"><a name="l01268"></a><span class="lineno"> 1268</span> }</div><div class="line"><a name="l01269"></a><span class="lineno"> 1269</span> </div><div class="line"><a name="l01270"></a><span class="lineno"> 1270</span> <span class="keywordtype">int</span> main(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> *argv[])</div><div class="line"><a name="l01271"></a><span class="lineno"> 1271</span> {</div><div class="line"><a name="l01272"></a><span class="lineno"> 1272</span>  sigset_t sigset;</div><div class="line"><a name="l01273"></a><span class="lineno"> 1273</span>  <span class="keywordtype">int</span> ch;</div><div class="line"><a name="l01274"></a><span class="lineno"> 1274</span>  <span class="keywordtype">int</span> fd;</div><div class="line"><a name="l01275"></a><span class="lineno"> 1275</span>  <span class="keywordtype">int</span> res;</div><div class="line"><a name="l01276"></a><span class="lineno"> 1276</span>  <span class="keywordtype">char</span> *origmnt;</div><div class="line"><a name="l01277"></a><span class="lineno"> 1277</span>  <span class="keywordtype">char</span> *mnt;</div><div class="line"><a name="l01278"></a><span class="lineno"> 1278</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> unmount = 0;</div><div class="line"><a name="l01279"></a><span class="lineno"> 1279</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> lazy = 0;</div><div class="line"><a name="l01280"></a><span class="lineno"> 1280</span>  <span class="keyword">static</span> <span class="keywordtype">int</span> quiet = 0;</div><div class="line"><a name="l01281"></a><span class="lineno"> 1281</span>  <span class="keywordtype">char</span> *commfd;</div><div class="line"><a name="l01282"></a><span class="lineno"> 1282</span>  <span class="keywordtype">int</span> cfd;</div><div class="line"><a name="l01283"></a><span class="lineno"> 1283</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *opts = <span class="stringliteral">""</span>;</div><div class="line"><a name="l01284"></a><span class="lineno"> 1284</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *type = NULL;</div><div class="line"><a name="l01285"></a><span class="lineno"> 1285</span> </div><div class="line"><a name="l01286"></a><span class="lineno"> 1286</span>  <span class="keyword">static</span> <span class="keyword">const</span> <span class="keyword">struct </span>option long_opts[] = {</div><div class="line"><a name="l01287"></a><span class="lineno"> 1287</span>  {<span class="stringliteral">"unmount"</span>, no_argument, NULL, <span class="charliteral">'u'</span>},</div><div class="line"><a name="l01288"></a><span class="lineno"> 1288</span>  {<span class="stringliteral">"lazy"</span>, no_argument, NULL, <span class="charliteral">'z'</span>},</div><div class="line"><a name="l01289"></a><span class="lineno"> 1289</span>  {<span class="stringliteral">"quiet"</span>, no_argument, NULL, <span class="charliteral">'q'</span>},</div><div class="line"><a name="l01290"></a><span class="lineno"> 1290</span>  {<span class="stringliteral">"help"</span>, no_argument, NULL, <span class="charliteral">'h'</span>},</div><div class="line"><a name="l01291"></a><span class="lineno"> 1291</span>  {<span class="stringliteral">"version"</span>, no_argument, NULL, <span class="charliteral">'V'</span>},</div><div class="line"><a name="l01292"></a><span class="lineno"> 1292</span>  {0, 0, 0, 0}};</div><div class="line"><a name="l01293"></a><span class="lineno"> 1293</span> </div><div class="line"><a name="l01294"></a><span class="lineno"> 1294</span>  progname = strdup(argv[0]);</div><div class="line"><a name="l01295"></a><span class="lineno"> 1295</span>  <span class="keywordflow">if</span> (progname == NULL) {</div><div class="line"><a name="l01296"></a><span class="lineno"> 1296</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to allocate memory\n"</span>, argv[0]);</div><div class="line"><a name="l01297"></a><span class="lineno"> 1297</span>  exit(1);</div><div class="line"><a name="l01298"></a><span class="lineno"> 1298</span>  }</div><div class="line"><a name="l01299"></a><span class="lineno"> 1299</span> </div><div class="line"><a name="l01300"></a><span class="lineno"> 1300</span>  <span class="keywordflow">while</span> ((ch = getopt_long(argc, argv, <span class="stringliteral">"hVo:uzq"</span>, long_opts,</div><div class="line"><a name="l01301"></a><span class="lineno"> 1301</span>  NULL)) != -1) {</div><div class="line"><a name="l01302"></a><span class="lineno"> 1302</span>  <span class="keywordflow">switch</span> (ch) {</div><div class="line"><a name="l01303"></a><span class="lineno"> 1303</span>  <span class="keywordflow">case</span> <span class="charliteral">'h'</span>:</div><div class="line"><a name="l01304"></a><span class="lineno"> 1304</span>  usage();</div><div class="line"><a name="l01305"></a><span class="lineno"> 1305</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01306"></a><span class="lineno"> 1306</span> </div><div class="line"><a name="l01307"></a><span class="lineno"> 1307</span>  <span class="keywordflow">case</span> <span class="charliteral">'V'</span>:</div><div class="line"><a name="l01308"></a><span class="lineno"> 1308</span>  show_version();</div><div class="line"><a name="l01309"></a><span class="lineno"> 1309</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01310"></a><span class="lineno"> 1310</span> </div><div class="line"><a name="l01311"></a><span class="lineno"> 1311</span>  <span class="keywordflow">case</span> <span class="charliteral">'o'</span>:</div><div class="line"><a name="l01312"></a><span class="lineno"> 1312</span>  opts = optarg;</div><div class="line"><a name="l01313"></a><span class="lineno"> 1313</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01314"></a><span class="lineno"> 1314</span> </div><div class="line"><a name="l01315"></a><span class="lineno"> 1315</span>  <span class="keywordflow">case</span> <span class="charliteral">'u'</span>:</div><div class="line"><a name="l01316"></a><span class="lineno"> 1316</span>  unmount = 1;</div><div class="line"><a name="l01317"></a><span class="lineno"> 1317</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01318"></a><span class="lineno"> 1318</span> </div><div class="line"><a name="l01319"></a><span class="lineno"> 1319</span>  <span class="keywordflow">case</span> <span class="charliteral">'z'</span>:</div><div class="line"><a name="l01320"></a><span class="lineno"> 1320</span>  lazy = 1;</div><div class="line"><a name="l01321"></a><span class="lineno"> 1321</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01322"></a><span class="lineno"> 1322</span> </div><div class="line"><a name="l01323"></a><span class="lineno"> 1323</span>  <span class="keywordflow">case</span> <span class="charliteral">'q'</span>:</div><div class="line"><a name="l01324"></a><span class="lineno"> 1324</span>  quiet = 1;</div><div class="line"><a name="l01325"></a><span class="lineno"> 1325</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01326"></a><span class="lineno"> 1326</span> </div><div class="line"><a name="l01327"></a><span class="lineno"> 1327</span>  <span class="keywordflow">default</span>:</div><div class="line"><a name="l01328"></a><span class="lineno"> 1328</span>  exit(1);</div><div class="line"><a name="l01329"></a><span class="lineno"> 1329</span>  }</div><div class="line"><a name="l01330"></a><span class="lineno"> 1330</span>  }</div><div class="line"><a name="l01331"></a><span class="lineno"> 1331</span> </div><div class="line"><a name="l01332"></a><span class="lineno"> 1332</span>  <span class="keywordflow">if</span> (lazy && !unmount) {</div><div class="line"><a name="l01333"></a><span class="lineno"> 1333</span>  fprintf(stderr, <span class="stringliteral">"%s: -z can only be used with -u\n"</span>, progname);</div><div class="line"><a name="l01334"></a><span class="lineno"> 1334</span>  exit(1);</div><div class="line"><a name="l01335"></a><span class="lineno"> 1335</span>  }</div><div class="line"><a name="l01336"></a><span class="lineno"> 1336</span> </div><div class="line"><a name="l01337"></a><span class="lineno"> 1337</span>  <span class="keywordflow">if</span> (optind >= argc) {</div><div class="line"><a name="l01338"></a><span class="lineno"> 1338</span>  fprintf(stderr, <span class="stringliteral">"%s: missing mountpoint argument\n"</span>, progname);</div><div class="line"><a name="l01339"></a><span class="lineno"> 1339</span>  exit(1);</div><div class="line"><a name="l01340"></a><span class="lineno"> 1340</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (argc > optind + 1) {</div><div class="line"><a name="l01341"></a><span class="lineno"> 1341</span>  fprintf(stderr, <span class="stringliteral">"%s: extra arguments after the mountpoint\n"</span>,</div><div class="line"><a name="l01342"></a><span class="lineno"> 1342</span>  progname);</div><div class="line"><a name="l01343"></a><span class="lineno"> 1343</span>  exit(1);</div><div class="line"><a name="l01344"></a><span class="lineno"> 1344</span>  }</div><div class="line"><a name="l01345"></a><span class="lineno"> 1345</span> </div><div class="line"><a name="l01346"></a><span class="lineno"> 1346</span>  origmnt = argv[optind];</div><div class="line"><a name="l01347"></a><span class="lineno"> 1347</span> </div><div class="line"><a name="l01348"></a><span class="lineno"> 1348</span>  drop_privs();</div><div class="line"><a name="l01349"></a><span class="lineno"> 1349</span>  mnt = fuse_mnt_resolve_path(progname, origmnt);</div><div class="line"><a name="l01350"></a><span class="lineno"> 1350</span>  <span class="keywordflow">if</span> (mnt != NULL) {</div><div class="line"><a name="l01351"></a><span class="lineno"> 1351</span>  res = chdir(<span class="stringliteral">"/"</span>);</div><div class="line"><a name="l01352"></a><span class="lineno"> 1352</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l01353"></a><span class="lineno"> 1353</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to chdir to '/'\n"</span>, progname);</div><div class="line"><a name="l01354"></a><span class="lineno"> 1354</span>  <span class="keywordflow">goto</span> err_out;</div><div class="line"><a name="l01355"></a><span class="lineno"> 1355</span>  }</div><div class="line"><a name="l01356"></a><span class="lineno"> 1356</span>  }</div><div class="line"><a name="l01357"></a><span class="lineno"> 1357</span>  restore_privs();</div><div class="line"><a name="l01358"></a><span class="lineno"> 1358</span>  <span class="keywordflow">if</span> (mnt == NULL)</div><div class="line"><a name="l01359"></a><span class="lineno"> 1359</span>  exit(1);</div><div class="line"><a name="l01360"></a><span class="lineno"> 1360</span> </div><div class="line"><a name="l01361"></a><span class="lineno"> 1361</span>  umask(033);</div><div class="line"><a name="l01362"></a><span class="lineno"> 1362</span>  <span class="keywordflow">if</span> (unmount)</div><div class="line"><a name="l01363"></a><span class="lineno"> 1363</span>  <span class="keywordflow">goto</span> do_unmount;</div><div class="line"><a name="l01364"></a><span class="lineno"> 1364</span> </div><div class="line"><a name="l01365"></a><span class="lineno"> 1365</span>  commfd = getenv(FUSE_COMMFD_ENV);</div><div class="line"><a name="l01366"></a><span class="lineno"> 1366</span>  <span class="keywordflow">if</span> (commfd == NULL) {</div><div class="line"><a name="l01367"></a><span class="lineno"> 1367</span>  fprintf(stderr, <span class="stringliteral">"%s: old style mounting not supported\n"</span>,</div><div class="line"><a name="l01368"></a><span class="lineno"> 1368</span>  progname);</div><div class="line"><a name="l01369"></a><span class="lineno"> 1369</span>  <span class="keywordflow">goto</span> err_out;</div><div class="line"><a name="l01370"></a><span class="lineno"> 1370</span>  }</div><div class="line"><a name="l01371"></a><span class="lineno"> 1371</span> </div><div class="line"><a name="l01372"></a><span class="lineno"> 1372</span>  fd = mount_fuse(mnt, opts, &type);</div><div class="line"><a name="l01373"></a><span class="lineno"> 1373</span>  <span class="keywordflow">if</span> (fd == -1)</div><div class="line"><a name="l01374"></a><span class="lineno"> 1374</span>  <span class="keywordflow">goto</span> err_out;</div><div class="line"><a name="l01375"></a><span class="lineno"> 1375</span> </div><div class="line"><a name="l01376"></a><span class="lineno"> 1376</span>  cfd = atoi(commfd);</div><div class="line"><a name="l01377"></a><span class="lineno"> 1377</span>  res = send_fd(cfd, fd);</div><div class="line"><a name="l01378"></a><span class="lineno"> 1378</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l01379"></a><span class="lineno"> 1379</span>  <span class="keywordflow">goto</span> err_out;</div><div class="line"><a name="l01380"></a><span class="lineno"> 1380</span>  close(fd);</div><div class="line"><a name="l01381"></a><span class="lineno"> 1381</span> </div><div class="line"><a name="l01382"></a><span class="lineno"> 1382</span>  <span class="keywordflow">if</span> (!auto_unmount) {</div><div class="line"><a name="l01383"></a><span class="lineno"> 1383</span>  free(mnt);</div><div class="line"><a name="l01384"></a><span class="lineno"> 1384</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l01385"></a><span class="lineno"> 1385</span>  }</div><div class="line"><a name="l01386"></a><span class="lineno"> 1386</span> </div><div class="line"><a name="l01387"></a><span class="lineno"> 1387</span>  <span class="comment">/* Become a daemon and wait for the parent to exit or die.</span></div><div class="line"><a name="l01388"></a><span class="lineno"> 1388</span> <span class="comment"> ie For the control socket to get closed.</span></div><div class="line"><a name="l01389"></a><span class="lineno"> 1389</span> <span class="comment"> btw We don't want to use daemon() function here because</span></div><div class="line"><a name="l01390"></a><span class="lineno"> 1390</span> <span class="comment"> it forks and messes with the file descriptors. */</span></div><div class="line"><a name="l01391"></a><span class="lineno"> 1391</span>  setsid();</div><div class="line"><a name="l01392"></a><span class="lineno"> 1392</span>  res = chdir(<span class="stringliteral">"/"</span>);</div><div class="line"><a name="l01393"></a><span class="lineno"> 1393</span>  <span class="keywordflow">if</span> (res == -1) {</div><div class="line"><a name="l01394"></a><span class="lineno"> 1394</span>  fprintf(stderr, <span class="stringliteral">"%s: failed to chdir to '/'\n"</span>, progname);</div><div class="line"><a name="l01395"></a><span class="lineno"> 1395</span>  <span class="keywordflow">goto</span> err_out;</div><div class="line"><a name="l01396"></a><span class="lineno"> 1396</span>  }</div><div class="line"><a name="l01397"></a><span class="lineno"> 1397</span> </div><div class="line"><a name="l01398"></a><span class="lineno"> 1398</span>  sigfillset(&sigset);</div><div class="line"><a name="l01399"></a><span class="lineno"> 1399</span>  sigprocmask(SIG_BLOCK, &sigset, NULL);</div><div class="line"><a name="l01400"></a><span class="lineno"> 1400</span> </div><div class="line"><a name="l01401"></a><span class="lineno"> 1401</span>  lazy = 1;</div><div class="line"><a name="l01402"></a><span class="lineno"> 1402</span>  quiet = 1;</div><div class="line"><a name="l01403"></a><span class="lineno"> 1403</span> </div><div class="line"><a name="l01404"></a><span class="lineno"> 1404</span>  <span class="keywordflow">while</span> (1) {</div><div class="line"><a name="l01405"></a><span class="lineno"> 1405</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[16];</div><div class="line"><a name="l01406"></a><span class="lineno"> 1406</span>  <span class="keywordtype">int</span> n = recv(cfd, buf, <span class="keyword">sizeof</span>(buf), 0);</div><div class="line"><a name="l01407"></a><span class="lineno"> 1407</span>  <span class="keywordflow">if</span> (!n)</div><div class="line"><a name="l01408"></a><span class="lineno"> 1408</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01409"></a><span class="lineno"> 1409</span> </div><div class="line"><a name="l01410"></a><span class="lineno"> 1410</span>  <span class="keywordflow">if</span> (n < 0) {</div><div class="line"><a name="l01411"></a><span class="lineno"> 1411</span>  <span class="keywordflow">if</span> (errno == EINTR)</div><div class="line"><a name="l01412"></a><span class="lineno"> 1412</span>  <span class="keywordflow">continue</span>;</div><div class="line"><a name="l01413"></a><span class="lineno"> 1413</span>  <span class="keywordflow">break</span>;</div><div class="line"><a name="l01414"></a><span class="lineno"> 1414</span>  }</div><div class="line"><a name="l01415"></a><span class="lineno"> 1415</span>  }</div><div class="line"><a name="l01416"></a><span class="lineno"> 1416</span> </div><div class="line"><a name="l01417"></a><span class="lineno"> 1417</span>  <span class="keywordflow">if</span> (!should_auto_unmount(mnt, type)) {</div><div class="line"><a name="l01418"></a><span class="lineno"> 1418</span>  <span class="keywordflow">goto</span> success_out;</div><div class="line"><a name="l01419"></a><span class="lineno"> 1419</span>  }</div><div class="line"><a name="l01420"></a><span class="lineno"> 1420</span> </div><div class="line"><a name="l01421"></a><span class="lineno"> 1421</span> do_unmount:</div><div class="line"><a name="l01422"></a><span class="lineno"> 1422</span>  <span class="keywordflow">if</span> (geteuid() == 0)</div><div class="line"><a name="l01423"></a><span class="lineno"> 1423</span>  res = unmount_fuse(mnt, quiet, lazy);</div><div class="line"><a name="l01424"></a><span class="lineno"> 1424</span>  <span class="keywordflow">else</span> {</div><div class="line"><a name="l01425"></a><span class="lineno"> 1425</span>  res = umount2(mnt, lazy ? UMOUNT_DETACH : 0);</div><div class="line"><a name="l01426"></a><span class="lineno"> 1426</span>  <span class="keywordflow">if</span> (res == -1 && !quiet)</div><div class="line"><a name="l01427"></a><span class="lineno"> 1427</span>  fprintf(stderr,</div><div class="line"><a name="l01428"></a><span class="lineno"> 1428</span>  <span class="stringliteral">"%s: failed to unmount %s: %s\n"</span>,</div><div class="line"><a name="l01429"></a><span class="lineno"> 1429</span>  progname, mnt, strerror(errno));</div><div class="line"><a name="l01430"></a><span class="lineno"> 1430</span>  }</div><div class="line"><a name="l01431"></a><span class="lineno"> 1431</span>  <span class="keywordflow">if</span> (res == -1)</div><div class="line"><a name="l01432"></a><span class="lineno"> 1432</span>  <span class="keywordflow">goto</span> err_out;</div><div class="line"><a name="l01433"></a><span class="lineno"> 1433</span> </div><div class="line"><a name="l01434"></a><span class="lineno"> 1434</span> success_out:</div><div class="line"><a name="l01435"></a><span class="lineno"> 1435</span>  free(mnt);</div><div class="line"><a name="l01436"></a><span class="lineno"> 1436</span>  <span class="keywordflow">return</span> 0;</div><div class="line"><a name="l01437"></a><span class="lineno"> 1437</span> </div><div class="line"><a name="l01438"></a><span class="lineno"> 1438</span> err_out:</div><div class="line"><a name="l01439"></a><span class="lineno"> 1439</span>  free(mnt);</div><div class="line"><a name="l01440"></a><span class="lineno"> 1440</span>  exit(1);</div><div class="line"><a name="l01441"></a><span class="lineno"> 1441</span> }</div></div><!-- fragment --></div><!-- contents -->
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