| /* |
| * 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., 59 |
| * Temple Place - Suite 330, Boston MA 02111-1307, 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); |
| } |