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_malloc(len + 2);
62 strcat(newdir, G_DIR_SEPARATOR_S);
68 try_tempfile(char *namebuf, int namebuflen, const char *dir, const char *pfx)
70 static const char suffix[] = "XXXXXXXXXX";
71 int namelen = strlen(dir) + strlen(pfx) + sizeof suffix;
75 if (namebuflen < namelen) {
76 /* Stick in a truncated name, so that if this error is
77 reported with the file name, you at least get
79 g_snprintf(namebuf, namebuflen, "%s%s%s", dir, pfx, suffix);
85 strcat(namebuf, suffix);
87 /* The Single UNIX Specification doesn't say that "mkstemp()"
88 creates the temporary file with mode rw-------, so we
89 won't assume that all UNIXes will do so; instead, we set
90 the umask to 0077 to take away all group and other
91 permissions, attempt to create the file, and then put
93 old_umask = umask(0077);
94 tmp_fd = mkstemp(namebuf);
99 static const char *tmpdir = NULL;
101 static const char *temp = NULL;
103 static const char *E_tmpdir;
106 #define P_tmpdir "/var/tmp"
110 create_tempfile(char *namebuf, int namebuflen, const char *pfx)
114 static gboolean initialized;
117 if ((dir = getenv("TMPDIR")) != NULL)
118 tmpdir = setup_tmpdir(dir);
120 if ((dir = getenv("TEMP")) != NULL)
121 temp = setup_tmpdir(dir);
124 E_tmpdir = setup_tmpdir(P_tmpdir);
128 if (tmpdir != NULL) {
129 fd = try_tempfile(namebuf, namebuflen, tmpdir, pfx);
136 fd = try_tempfile(namebuf, namebuflen, temp, pfx);
142 fd = try_tempfile(namebuf, namebuflen, E_tmpdir, pfx);
146 return try_tempfile(namebuf, namebuflen, G_DIR_SEPARATOR_S "tmp", pfx);