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
|
#ifndef __WINE_WINE_SERVER_TMPDIR_H
#define __WINE_WINE_SERVER_TMPDIR_H
#include <dirent.h>
/***********************************************************************
* server_tmpdir
*/
static inline char* server_tmpdir( const char* cfg_dir )
{
char *tmp_dir = NULL;
char *run_dir = NULL;
const char *tmp_prefix = "/tmp";
const char *run_prefix = "/run/user";
/* use $run_prefix/$uid as wineserver's tmpdir if possible */
if (asprintf( &run_dir, "%s/%u", run_prefix, getuid() ) < 0)
{
fatal_error("error building run_dir\n");
}
if (opendir( run_dir ))
{
if (asprintf( &tmp_dir, "%s/wine", run_dir ) < 0)
{
fatal_error("error building temporary directory in /run/user\n");
}
}
free( run_dir );
/* otherwise, use a randomly named directory under TMPDIR */
if (!tmp_dir)
{
FILE *stream;
char *root_dir = NULL;
char *wineserver_file = NULL;
mode_t mode = S_IRUSR;
/* determine the temporary directory */
root_dir = secure_getenv("TMPDIR");
if (!root_dir)
{
if (asprintf( &root_dir, "%s", tmp_prefix ) < 0)
{
fatal_error("error building root_dir\n");
}
}
/* remove existing wineserver tmpdir file if permissions are wrong */
if (asprintf( &wineserver_file, "%s/wineserver", cfg_dir ) < 0)
{
fatal_error("error building wineserver_file\n");
}
if (access( wineserver_file, F_OK ) != -1)
{
struct stat statbuf;
mode_t mode_mask = S_IRWXU | S_IRWXG | S_IRWXO;
if (stat( wineserver_file, &statbuf ) != 0)
{
fatal_error("error reading wineserver tmpdir file permissions\n");
}
if ((statbuf.st_mode & mode_mask) != mode)
{
if (remove( wineserver_file ) != 0)
{
fatal_error("error removing wineserver tmpdir file\n");
}
}
}
/* create or read the name of the directory */
stream = fopen( wineserver_file, "r" );
if (!stream)
{
int fd;
char *tmp_wine = NULL;
/* create a new randomized name for the directory */
if (asprintf( &tmp_wine, "%s/wine-XXXXXX", root_dir ) < 0)
{
fatal_error("error building tmp_wine/n");
}
tmp_dir = mkdtemp( tmp_wine );
if (!tmp_dir)
{
fatal_error("unable to create wineserver tmpdir\n");
}
if (tmp_dir != tmp_wine)
{
fatal_error("this condition is not handled\n");
}
/* save location of the chosen temporary directory */
fd = creat( wineserver_file, mode );
if (fd < 0)
{
fatal_error("error opening file descriptor for wineserver tmpdir file\n");
}
stream = fdopen( fd, "w" );
if (!stream)
{
fatal_error("error opening wineserver tmpdir file\n");
}
if (fputs( tmp_dir + strlen(root_dir) + 1, stream ) < 0)
{
fatal_error("error writing to wineserver tmpdir file\n");
}
if (fclose( stream ) != 0)
{
fatal_error("error closing wineserver tmpdir file\n");
}
}
else
{
char *tmp_wineserver = NULL;
size_t length = 0;
ssize_t nread;
/* try to read a previously generated wineserver tmpdir */
nread = getline( &tmp_wineserver, &length, stream );
if (fclose( stream ) != 0)
{
fatal_error("error closing wineserver tmpdir file\n");
}
/* if something went wrong, remove the broken file */
if (nread < 0)
{
remove( wineserver_file );
fatal_error("fixed a temporary directory error, please try running the same command again\n");
}
/* build the full path to the temporary directory */
if (asprintf( &tmp_dir, "%s/%s", root_dir, tmp_wineserver ) < 0)
{
fatal_error("error building temporary directory in /tmp\n");
}
free( tmp_wineserver );
}
free( root_dir );
free( wineserver_file );
}
return tmp_dir;
}
#endif
|
