2 * This file is part of DisOrder
3 * Copyright (C) 2005 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
24 #include <sys/types.h>
32 #include "configuration.h"
34 void become_mortal(void) {
38 if(!(pw = getpwnam(config->user)))
39 fatal(0, "cannot find user %s", config->user);
40 if(pw->pw_uid != getuid()) {
41 if(initgroups(config->user, pw->pw_gid))
42 fatal(errno, "error calling initgroups");
43 if(setgid(pw->pw_gid) < 0) fatal(errno, "error calling setgid");
44 if(setuid(pw->pw_uid) < 0) fatal(errno, "error calling setgid");
45 info("changed to user %s (uid %lu)", config->user, (unsigned long)getuid());
48 if(getuid() != pw->pw_uid) fatal(0, "wrong real uid");
49 if(geteuid() != pw->pw_uid) fatal(0, "wrong effective uid");
50 if(getgid() != pw->pw_gid) fatal(0, "wrong real gid");
51 if(getegid() != pw->pw_gid) fatal(0, "wrong effective gid");
52 if(setuid(0) != -1) fatal(0, "setuid(0) unexpectedly succeeded");
53 if(seteuid(0) != -1) fatal(0, "seteuid(0) unexpectedly succeeded");