2 * Routines to create temporary files
6 * Wireshark - Network traffic analyzer
7 * By Gerald Combs <gerald@wireshark.org>
8 * Copyright 1998 Gerald Combs
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version 2
13 * of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
40 #include "file_util.h"
50 setup_tmpdir(const char *dir)
52 size_t len = strlen(dir);
55 /* Append path separator if necessary */
56 if (len != 0 && dir[len - 1] == G_DIR_SEPARATOR) {
60 newdir = g_strdup_printf("%s%s", dir, G_DIR_SEPARATOR_S);
66 try_tempfile(char *namebuf, int namebuflen, const char *dir, const char *pfx)
68 static const char suffix[] = "XXXXXXXXXX";
69 int namelen = strlen(dir) + strlen(pfx) + sizeof suffix;
73 g_snprintf(namebuf, namebuflen, "%s%s%s", dir, pfx, suffix);
74 if (namebuflen < namelen) {
75 /* Stick with the truncated name, so that if this error is
76 reported with the file name, you at least get
82 /* The Single UNIX Specification doesn't say that "mkstemp()"
83 creates the temporary file with mode rw-------, so we
84 won't assume that all UNIXes will do so; instead, we set
85 the umask to 0077 to take away all group and other
86 permissions, attempt to create the file, and then put
88 old_umask = umask(0077);
89 tmp_fd = mkstemp(namebuf);
94 static const char *tmpdir = NULL;
96 static const char *temp = NULL;
98 static const char *E_tmpdir;
101 #define P_tmpdir "/var/tmp"
105 create_tempfile(char *namebuf, int namebuflen, const char *pfx)
109 static gboolean initialized;
112 if ((dir = getenv("TMPDIR")) != NULL)
113 tmpdir = setup_tmpdir(dir);
115 if ((dir = getenv("TEMP")) != NULL)
116 temp = setup_tmpdir(dir);
119 E_tmpdir = setup_tmpdir(P_tmpdir);
123 if (tmpdir != NULL) {
124 fd = try_tempfile(namebuf, namebuflen, tmpdir, pfx);
131 fd = try_tempfile(namebuf, namebuflen, temp, pfx);
137 fd = try_tempfile(namebuf, namebuflen, E_tmpdir, pfx);
141 return try_tempfile(namebuf, namebuflen, G_DIR_SEPARATOR_S "tmp", pfx);