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/* tempfile.c: handle temporary directory creation (formerly also temporary
* files but this is no longer used).
*
* Copyright (C) 2001, 2003, 2007, 2009, 2011 Colin Watson.
*
* This file is part of man-db.
*
* man-db is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* man-db is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with man-db; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif /* HAVE_CONFIG_H */
#include <assert.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "attribute.h"
#include "xvasprintf.h"
#include "manconfig.h"
#include "tempfile.h"
static bool ATTRIBUTE_PURE running_setid (void)
{
#ifdef HAVE_GETUID
return getuid () != geteuid () || getgid () != getegid ();
#else /* !HAVE_GETUID */
return false;
#endif /* HAVE_GETUID */
}
static const char *path_search (void)
{
const char *dir = NULL;
if (running_setid ()) {
dir = getenv ("TMPDIR");
if (!dir || !CAN_ACCESS (dir, W_OK))
dir = NULL;
if (!dir) {
dir = getenv ("TMP");
if (!dir || !CAN_ACCESS (dir, W_OK))
dir = NULL;
}
}
#ifdef P_tmpdir
if (!dir) {
dir = P_tmpdir;
if (!dir || !CAN_ACCESS (dir, W_OK))
dir = NULL;
}
#endif
if (!dir) {
dir = "/tmp";
if (!CAN_ACCESS (dir, W_OK))
dir = NULL;
}
return dir;
}
/* Get a sane temporary directory, looking in $TMPDIR, P_tmpdir, and finally
* /tmp.
*/
char *create_tempdir (const char *template)
{
const char *dir = path_search ();
char *created_dirname;
if (!dir)
return NULL;
created_dirname = xasprintf ("%s/%sXXXXXX", dir, template);
assert (created_dirname);
if (!mkdtemp (created_dirname))
return NULL;
return created_dirname;
}
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