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 2, or (at your option)
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, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Extracted from sysdeps/posix/tempname.c. */
31 # define __set_errno(Val) errno = (Val)
36 # define P_tmpdir "/tmp"
40 #if !defined S_ISDIR && defined S_IFDIR
41 # define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
43 #if !S_IRUSR && S_IREAD
44 # define S_IRUSR S_IREAD
47 # define S_IRUSR 00400
49 #if !S_IWUSR && S_IWRITE
50 # define S_IWUSR S_IWRITE
53 # define S_IWUSR 00200
55 #if !S_IXUSR && S_IEXEC
56 # define S_IXUSR S_IEXEC
59 # define S_IXUSR 00100
63 # define struct_stat64 struct stat64
65 # define struct_stat64 struct stat
66 # define __xstat64(version, path, buf) stat (path, buf)
69 #if ! (HAVE___SECURE_GETENV || _LIBC)
70 # define __secure_getenv getenv
74 ISSLASH(C) tests whether C is a directory separator character.
76 #if defined _WIN32 || defined __WIN32__ || defined __CYGWIN__ || defined __EMX__ || defined __DJGPP__
77 /* Win32, Cygwin, OS/2, DOS */
78 # define ISSLASH(C) ((C) == '/' || (C) == '\\')
81 # define ISSLASH(C) ((C) == '/')
85 /* Return nonzero if DIR is an existent directory. */
87 direxists (const char *dir)
90 return __xstat64 (_STAT_VER, dir, &buf) == 0 && S_ISDIR (buf.st_mode);
93 /* Path search algorithm, for tmpnam, tmpfile, etc. If DIR is
94 non-null and exists, uses it; otherwise uses the first of $TMPDIR,
95 P_tmpdir, /tmp that exists. Copies into TMPL a template suitable
96 for use with mk[s]temp. Will fail (-1) if DIR is non-null and
97 doesn't exist, none of the searched dirs exists, or there's not
98 enough space in TMPL. */
100 path_search (char *tmpl, size_t tmpl_len, const char *dir, const char *pfx,
120 d = __secure_getenv ("TMPDIR");
121 if (d != NULL && direxists (d))
123 else if (dir != NULL && direxists (dir))
130 if (direxists (P_tmpdir))
132 else if (strcmp (P_tmpdir, "/tmp") != 0 && direxists ("/tmp"))
136 __set_errno (ENOENT);
142 while (dlen >= 1 && ISSLASH (dir[dlen - 1]))
143 dlen--; /* remove trailing slashes */
145 /* check we have room for "${dir}/${pfx}XXXXXX\0" */
146 if (tmpl_len < dlen + 1 + plen + 6 + 1)
148 __set_errno (EINVAL);
152 sprintf (tmpl, "%.*s/%.*sXXXXXX", (int) dlen, dir, (int) plen, pfx);