1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
|
/*
* tmpfile.c - functions to create and safely open temp files for the shell.
*/
/* Copyright (C) 2000 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Bash is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Bash. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <bashtypes.h>
#include <posixstat.h>
#include <posixtime.h>
#include <filecntl.h>
#if defined (HAVE_UNISTD_H)
# include <unistd.h>
#endif
#include <bashansi.h>
#include <stdio.h>
#include <errno.h>
#include <shell.h>
#ifndef errno
extern int errno;
#endif
#define BASEOPENFLAGS (O_CREAT | O_TRUNC | O_EXCL | O_BINARY)
#define DEFAULT_TMPDIR "." /* bogus default, should be changed */
#define DEFAULT_NAMEROOT "shtmp"
extern pid_t dollar_dollar_pid;
static char *get_sys_tmpdir __P((void));
static char *get_tmpdir __P((int));
static char *sys_tmpdir = (char *)NULL;
static int ntmpfiles;
static int tmpnamelen = -1;
static unsigned long filenum = 1L;
static char *
get_sys_tmpdir ()
{
if (sys_tmpdir)
return sys_tmpdir;
#ifdef P_tmpdir
sys_tmpdir = P_tmpdir;
if (file_iswdir (sys_tmpdir))
return sys_tmpdir;
#endif
sys_tmpdir = "/tmp";
if (file_iswdir (sys_tmpdir))
return sys_tmpdir;
sys_tmpdir = "/var/tmp";
if (file_iswdir (sys_tmpdir))
return sys_tmpdir;
sys_tmpdir = "/usr/tmp";
if (file_iswdir (sys_tmpdir))
return sys_tmpdir;
sys_tmpdir = DEFAULT_TMPDIR;
return sys_tmpdir;
}
static char *
get_tmpdir (flags)
int flags;
{
char *tdir;
tdir = (flags & MT_USETMPDIR) ? get_string_value ("TMPDIR") : (char *)NULL;
if (tdir && (file_iswdir (tdir) == 0 || strlen (tdir) > PATH_MAX))
tdir = 0;
if (tdir == 0)
tdir = get_sys_tmpdir ();
#if defined (HAVE_PATHCONF) && defined (_PC_NAME_MAX)
if (tmpnamelen == -1)
tmpnamelen = pathconf (tdir, _PC_NAME_MAX);
#else
tmpnamelen = 0;
#endif
return tdir;
}
char *
sh_mktmpname (nameroot, flags)
char *nameroot;
int flags;
{
char *filename, *tdir, *lroot;
struct stat sb;
int r, tdlen;
filename = (char *)xmalloc (PATH_MAX + 1);
tdir = get_tmpdir (flags);
tdlen = strlen (tdir);
lroot = nameroot ? nameroot : DEFAULT_NAMEROOT;
#ifdef USE_MKTEMP
sprintf (filename, "%s/%s.XXXXXX", tdir, lroot);
if (mktemp (filename) == 0)
{
free (filename);
filename = NULL;
}
#else /* !USE_MKTEMP */
while (1)
{
filenum = (filenum << 1) ^
(unsigned long) time ((time_t *)0) ^
(unsigned long) dollar_dollar_pid ^
(unsigned long) ((flags & MT_USERANDOM) ? random () : ntmpfiles++);
sprintf (filename, "%s/%s-%lu", tdir, lroot, filenum);
if (tmpnamelen > 0 && tmpnamelen < 32)
filename[tdlen + 1 + tmpnamelen] = '\0';
# ifdef HAVE_LSTAT
r = lstat (filename, &sb);
# else
r = stat (filename, &sb);
# endif
if (r < 0 && errno == ENOENT)
break;
}
#endif /* !USE_MKTEMP */
return filename;
}
int
sh_mktmpfd (nameroot, flags, namep)
char *nameroot;
int flags;
char **namep;
{
char *filename, *tdir, *lroot;
int fd, tdlen;
filename = (char *)xmalloc (PATH_MAX + 1);
tdir = get_tmpdir (flags);
tdlen = strlen (tdir);
lroot = nameroot ? nameroot : DEFAULT_NAMEROOT;
#ifdef USE_MKSTEMP
sprintf (filename, "%s/%s.XXXXXX", tdir, lroot);
fd = mkstemp (filename);
if (fd < 0 || namep == 0)
{
free (filename);
filename = NULL;
}
if (namep)
*namep = filename;
return fd;
#else /* !USE_MKSTEMP */
do
{
filenum = (filenum << 1) ^
(unsigned long) time ((time_t *)0) ^
(unsigned long) dollar_dollar_pid ^
(unsigned long) ((flags & MT_USERANDOM) ? random () : ntmpfiles++);
sprintf (filename, "%s/%s-%lu", tdir, lroot, filenum);
if (tmpnamelen > 0 && tmpnamelen < 32)
filename[tdlen + 1 + tmpnamelen] = '\0';
fd = open (filename, BASEOPENFLAGS | ((flags & MT_READWRITE) ? O_RDWR : O_WRONLY), 0600);
}
while (fd < 0 && errno == EEXIST);
if (namep)
*namep = filename;
else
free (filename);
return fd;
#endif /* !USE_MKSTEMP */
}
FILE *
sh_mktmpfp (nameroot, flags, namep)
char *nameroot;
int flags;
char **namep;
{
int fd;
FILE *fp;
fd = sh_mktmpfd (nameroot, flags, namep);
if (fd < 0)
return ((FILE *)NULL);
fp = fdopen (fd, (flags & MT_READWRITE) ? "w+" : "w");
if (fp == 0)
close (fd);
return fp;
}
|
