--- /dev/null
+// $Id: jailintotempdir.c,v 1.2 2004/03/15 21:37:06 ensc Exp $ --*- c -*--
+
+// Copyright (C) 2004 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//
+// This program 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; version 2 of the License.
+//
+// This program 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 this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "jail.h"
+
+#include <stdlib.h>
+#include <grp.h>
+#include <unistd.h>
+
+bool
+jailIntoTempDir(char const **err_pos)
+{
+ gid_t const id = 1;
+ char buf[] = "/tmp/jaildir.XXXXXX";
+ char const * d = mkdtemp(buf);
+ char const * err = "mkdtemp()";
+
+ if (d==0 ||
+ (err="chdir()", chdir(d)==-1) ||
+ (err="rmdir()", rmdir(d)==-1) ||
+ (err="chroot()", chroot(".")==-1) ||
+ (err="setgroups()",setgroups(1, &id)==-1) ||
+ (err="setgid()", setgid(id)==-1) ||
+ (err="setuid()", setuid(id)==-1) ||
+ (err="getgid()", getgid()!=id) ||
+ (err="getuid()", getuid()!=id)) {
+ if (err_pos!=0) *err_pos = err;
+ return false;
+ }
+
+ return true;
+}