1 /* Copyright (C) 1999, 2001-2002, 2006, 2009-2021 Free Software Foundation,
3 This file is part of the GNU C Library.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
18 /* Extracted from sysdeps/posix/tempname.c. */
31 # define __set_errno(Val) errno = (Val)
36 # ifdef _P_tmpdir /* native Windows */
37 # define P_tmpdir _P_tmpdir
39 # define P_tmpdir "/tmp"
45 #if defined _WIN32 && ! defined __CYGWIN__
46 # define WIN32_LEAN_AND_MEAN /* avoid including junk */
52 #if defined _WIN32 && ! defined __CYGWIN__
53 /* Don't assume that UNICODE is not defined. */
55 # define GetTempPath GetTempPathA
59 # define struct_stat64 struct stat64
61 # define struct_stat64 struct stat
62 # define __libc_secure_getenv secure_getenv
63 # define __xstat64(version, path, buf) stat (path, buf)
67 ISSLASH(C) tests whether C is a directory separator character.
69 #if defined _WIN32 || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
70 /* Native Windows, Cygwin, OS/2, DOS */
71 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
74 # define ISSLASH(C) ((C) == '/')
78 /* Return nonzero if DIR is an existent directory. */
80 direxists (const char *dir)
83 return __xstat64 (_STAT_VER, dir, &buf) == 0 && S_ISDIR (buf.st_mode);
86 /* Path search algorithm, for tmpnam, tmpfile, etc. If DIR is
87 non-null and exists, uses it; otherwise uses the first of $TMPDIR,
88 P_tmpdir, /tmp that exists. Copies into TMPL a template suitable
89 for use with mk[s]temp. Will fail (-1) if DIR is non-null and
90 doesn't exist, none of the searched dirs exists, or there's not
91 enough space in TMPL. */
93 path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
114 d = __libc_secure_getenv ("TMPDIR");
115 if (d != NULL && direxists (d))
117 else if (dir != NULL && direxists (dir))
124 #if defined _WIN32 && ! defined __CYGWIN__
125 char dirbuf[PATH_MAX];
128 /* Find Windows temporary file directory.
129 We try this before P_tmpdir because Windows defines P_tmpdir to "\\"
130 and will therefore try to put all temporary files in the root
131 directory (unless $TMPDIR is set). */
132 retval = GetTempPath (PATH_MAX, dirbuf);
133 if (retval > 0 && retval < PATH_MAX && direxists (dirbuf))
137 if (direxists (P_tmpdir))
139 else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
143 __set_errno (ENOENT);
152 add_slash = dlen != 0 && !ISSLASH (dir[dlen - 1]);
155 /* check we have room for "${dir}/${pfx}XXXXXX\0" */
156 if (tmpl_len < dlen + add_slash + plen + 6 + 1)
158 __set_errno (EINVAL);
162 memcpy (tmpl, dir, dlen);
163 sprintf (tmpl + dlen, &"/%.*sXXXXXX"[!add_slash], (int) plen, pfx);