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