121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/*****************************************************************************
|
|
*
|
|
* $Id$
|
|
* Purpose ...............: MBSE BBS Shadow Password Suite
|
|
* Original Source .......: Shadow Password Suite
|
|
* Original Copyright ....: Julianne Frances Haugh and others.
|
|
*
|
|
*****************************************************************************
|
|
* Copyright (C) 1997-2001
|
|
*
|
|
* Michiel Broek FIDO: 2:280/2802
|
|
* Beekmansbos 10
|
|
* 1971 BV IJmuiden
|
|
* the Netherlands
|
|
*
|
|
* This file is part of MBSE BBS.
|
|
*
|
|
* This BBS 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, or (at your option) any
|
|
* later version.
|
|
*
|
|
* MBSE BBS 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 MBSE BBS; see the file COPYING. If not, write to the Free
|
|
* Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Separated from setup.c. --marekm
|
|
*/
|
|
|
|
#include "../config.h"
|
|
#include <stdio.h>
|
|
#include <syslog.h>
|
|
#include "mblogin.h"
|
|
#include <pwd.h>
|
|
#include <grp.h>
|
|
#include "getdef.h"
|
|
#include "setugid.h"
|
|
|
|
|
|
/*
|
|
* setup_uid_gid() split in two functions for PAM support -
|
|
* pam_setcred() needs to be called after initgroups(), but
|
|
* before setuid().
|
|
*/
|
|
|
|
int setup_groups(const struct passwd *info)
|
|
{
|
|
/*
|
|
* Set the real group ID to the primary group ID in the password
|
|
* file.
|
|
*/
|
|
if (setgid (info->pw_gid) == -1) {
|
|
perror("setgid");
|
|
syslog(LOG_ERR, "bad group ID `%d' for user `%s': %m\n", info->pw_gid, info->pw_name);
|
|
closelog();
|
|
return -1;
|
|
}
|
|
#ifdef HAVE_INITGROUPS
|
|
/*
|
|
* For systems which support multiple concurrent groups, go get
|
|
* the group set from the /etc/group file.
|
|
*/
|
|
if (initgroups(info->pw_name, info->pw_gid) == -1) {
|
|
perror("initgroups");
|
|
syslog(LOG_ERR, "initgroups failed for user `%s': %m\n", info->pw_name);
|
|
closelog();
|
|
return -1;
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
int change_uid(const struct passwd *info)
|
|
{
|
|
/*
|
|
* Set the real UID to the UID value in the password file.
|
|
*/
|
|
#ifndef BSD
|
|
if (setuid(info->pw_uid))
|
|
#else
|
|
if (setreuid(info->pw_uid, info->pw_uid))
|
|
#endif
|
|
{
|
|
perror("setuid");
|
|
syslog(LOG_ERR, "bad user ID `%d' for user `%s': %m\n", (int) info->pw_uid, info->pw_name);
|
|
closelog();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
* setup_uid_gid() performs the following steps -
|
|
*
|
|
* set the group ID to the value from the password file entry
|
|
* set the supplementary group IDs
|
|
*
|
|
* Returns 0 on success, or -1 on failure.
|
|
*/
|
|
int setup_uid_gid(const struct passwd *info, int is_console)
|
|
{
|
|
if (setup_groups(info) < 0)
|
|
return -1;
|
|
|
|
if (change_uid(info) < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|