2 * Routines to create temporary files
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@ethereal.com>
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"
42 #if GLIB_MAJOR_VERSION > 2 || (GLIB_MAJOR_VERSION == 2 && GLIB_MINOR_VERSION >= 6)
43 #include <glib/gstdio.h> /* available since GLib 2.6 only! */
45 /* GLib2.6 or above, using new wrapper functions */
46 #define eth_mkstemp g_mkstemp
48 #define eth_mkstemp mkstemp
52 * This has to come after the include of <pcap.h>, as the include of
53 * <pcap.h> might cause <winsock2.h> to be included, and if we've
54 * already included <winsock.h> as a result of including <windows.h>,
55 * we get a bunch of redefinitions.
64 setup_tmpdir(const char *dir)
66 size_t len = strlen(dir);
69 /* Append path separator if necessary */
70 if (len != 0 && dir[len - 1] == G_DIR_SEPARATOR) {
74 newdir = g_malloc(len + 2);
76 strcat(newdir, G_DIR_SEPARATOR_S);
82 try_tempfile(char *namebuf, int namebuflen, const char *dir, const char *pfx)
84 static const char suffix[] = "XXXXXXXXXX";
85 int namelen = strlen(dir) + strlen(pfx) + sizeof suffix;
89 if (namebuflen < namelen) {
90 /* Stick in a truncated name, so that if this error is
91 reported with the file name, you at least get
93 g_snprintf(namebuf, namebuflen, "%s%s%s", dir, pfx, suffix);
99 strcat(namebuf, suffix);
101 /* The Single UNIX Specification doesn't say that "mkstemp()"
102 creates the temporary file with mode rw-------, so we
103 won't assume that all UNIXes will do so; instead, we set
104 the umask to 0077 to take away all group and other
105 permissions, attempt to create the file, and then put
107 old_umask = umask(0077);
108 tmp_fd = eth_mkstemp(namebuf);
113 static const char *tmpdir = NULL;
115 static const char *temp = NULL;
117 static const char *E_tmpdir;
120 #define P_tmpdir "/var/tmp"
124 create_tempfile(char *namebuf, int namebuflen, const char *pfx)
128 static gboolean initialized;
131 if ((dir = getenv("TMPDIR")) != NULL)
132 tmpdir = setup_tmpdir(dir);
134 if ((dir = getenv("TEMP")) != NULL)
135 temp = setup_tmpdir(dir);
138 E_tmpdir = setup_tmpdir(P_tmpdir);
142 if (tmpdir != NULL) {
143 fd = try_tempfile(namebuf, namebuflen, tmpdir, pfx);
150 fd = try_tempfile(namebuf, namebuflen, temp, pfx);
156 fd = try_tempfile(namebuf, namebuflen, E_tmpdir, pfx);
160 return try_tempfile(namebuf, namebuflen, G_DIR_SEPARATOR_S "tmp", pfx);