1 /* Copyright (C) 1999, 2001-2002, 2006 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Extracted from sysdeps/posix/tempname.c. */
30 # define __set_errno(Val) errno = (Val)
35 # define P_tmpdir "/tmp"
41 # define struct_stat64 struct stat64
43 # define struct_stat64 struct stat
44 # define __xstat64(version, path, buf) stat (path, buf)
47 #if ! (HAVE___SECURE_GETENV || _LIBC)
48 # define __secure_getenv getenv
52 ISSLASH(C) tests whether C is a directory separator character.
54 #if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
55 /* Win32, Cygwin, OS/2, DOS */
56 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
59 # define ISSLASH(C) ((C) == '/')
63 /* Return nonzero if DIR is an existent directory. */
65 direxists (const char *dir)
68 return __xstat64 (_STAT_VER, dir, &buf) == 0 && S_ISDIR (buf.st_mode);
71 /* Path search algorithm, for tmpnam, tmpfile, etc. If DIR is
72 non-null and exists, uses it; otherwise uses the first of $TMPDIR,
73 P_tmpdir, /tmp that exists. Copies into TMPL a template suitable
74 for use with mk[s]temp. Will fail (-1) if DIR is non-null and
75 doesn't exist, none of the searched dirs exists, or there's not
76 enough space in TMPL. */
78 path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
98 d = __secure_getenv ("TMPDIR");
99 if (d != NULL && direxists (d))
101 else if (dir != NULL && direxists (dir))
108 if (direxists (P_tmpdir))
110 else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
114 __set_errno (ENOENT);
120 while (dlen >= 1 && ISSLASH (dir[dlen - 1]))
121 dlen--; /* remove trailing slashes */
123 /* check we have room for "${dir}/${pfx}XXXXXX\0" */
124 if (tmpl_len < dlen + 1 + plen + 6 + 1)
126 __set_errno (EINVAL);
130 sprintf (tmpl, "%.*s/%.*sXXXXXX", (int) dlen, dir, (int) plen, pfx);