64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
|
|
* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of version 2 of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Description: This is a setuid to root program invoked by a non-root
|
|
* process to validate the mount flag MS_NOSUID.
|
|
*
|
|
* This function exit with 0 or 1 depending upon the
|
|
* success/failure of setuid(2) system call.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
|
|
/* Save the effective and real UIDs. */
|
|
|
|
static uid_t ruid;
|
|
|
|
/* Restore the effective UID to its original value. */
|
|
|
|
int do_setuid(void)
|
|
{
|
|
int status;
|
|
|
|
status = setreuid(ruid, 0);
|
|
if (status < 0) {
|
|
return 1;
|
|
} else {
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Main program. */
|
|
|
|
int main(void)
|
|
{
|
|
int exit_status;
|
|
|
|
/* Save the real and effective user IDs. */
|
|
ruid = getuid();
|
|
exit_status = do_setuid();
|
|
|
|
exit(exit_status);
|
|
}
|