This source file includes following definitions.
- direxists
- path_search
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20 #include <config.h>
21
22
23 #include "tmpdir.h"
24
25 #include <stdbool.h>
26 #include <stdlib.h>
27 #include <string.h>
28
29 #include <errno.h>
30 #ifndef __set_errno
31 # define __set_errno(Val) errno = (Val)
32 #endif
33
34 #include <stdio.h>
35 #ifndef P_tmpdir
36 # ifdef _P_tmpdir
37 # define P_tmpdir _P_tmpdir
38 # else
39 # define P_tmpdir "/tmp"
40 # endif
41 #endif
42
43 #include <sys/stat.h>
44
45 #if defined _WIN32 && ! defined __CYGWIN__
46 # define WIN32_LEAN_AND_MEAN
47 # include <windows.h>
48 #endif
49
50 #include "pathmax.h"
51
52 #if defined _WIN32 && ! defined __CYGWIN__
53
54 # undef GetTempPath
55 # define GetTempPath GetTempPathA
56 #endif
57
58 #if _LIBC
59 # define struct_stat64 struct stat64
60 #else
61 # define struct_stat64 struct stat
62 # define __libc_secure_getenv secure_getenv
63 # define __xstat64(version, path, buf) stat (path, buf)
64 #endif
65
66
67
68
69 #if defined _WIN32 || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
70
71 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
72 #else
73
74 # define ISSLASH(C) ((C) == '/')
75 #endif
76
77
78
79 static bool
80 direxists (const char *dir)
81 {
82 struct_stat64 buf;
83 return __xstat64 (_STAT_VER, dir, &buf) == 0 && S_ISDIR (buf.st_mode);
84 }
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90
91
92 int
93 path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
94 bool try_tmpdir)
95 {
96 const char *d;
97 size_t dlen, plen;
98 bool add_slash;
99
100 if (!pfx || !pfx[0])
101 {
102 pfx = "file";
103 plen = 4;
104 }
105 else
106 {
107 plen = strlen (pfx);
108 if (plen > 5)
109 plen = 5;
110 }
111
112 if (try_tmpdir)
113 {
114 d = __libc_secure_getenv ("TMPDIR");
115 if (d != NULL && direxists (d))
116 dir = d;
117 else if (dir != NULL && direxists (dir))
118 ;
119 else
120 dir = NULL;
121 }
122 if (dir == NULL)
123 {
124 #if defined _WIN32 && ! defined __CYGWIN__
125 char dirbuf[PATH_MAX];
126 DWORD retval;
127
128
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131
132 retval = GetTempPath (PATH_MAX, dirbuf);
133 if (retval > 0 && retval < PATH_MAX && direxists (dirbuf))
134 dir = dirbuf;
135 else
136 #endif
137 if (direxists (P_tmpdir))
138 dir = P_tmpdir;
139 else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
140 dir = "/tmp";
141 else
142 {
143 __set_errno (ENOENT);
144 return -1;
145 }
146 }
147
148 dlen = strlen (dir);
149 #ifdef __VMS
150 add_slash = 0;
151 #else
152 add_slash = dlen != 0 && !ISSLASH (dir[dlen - 1]);
153 #endif
154
155
156 if (tmpl_len < dlen + add_slash + plen + 6 + 1)
157 {
158 __set_errno (EINVAL);
159 return -1;
160 }
161
162 memcpy (tmpl, dir, dlen);
163 sprintf (tmpl + dlen, &"/%.*sXXXXXX"[!add_slash], (int) plen, pfx);
164 return 0;
165 }