| /* Copyright (C) 1998,2000,2003,2004,2006 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <errno.h> |
| #include <unistd.h> |
| #include <setxid.h> |
| #include <linux/posix_types.h> |
| #include <kernel-features.h> |
| |
| |
| #ifdef __NR_setuid32 |
| # if __ASSUME_32BITUIDS == 0 |
| /* This variable is shared with all files that need to check for 32bit |
| uids. */ |
| extern int __libc_missing_32bit_uids; |
| # endif |
| #endif /* __NR_setuid32 */ |
| |
| int |
| __setuid (uid_t uid) |
| { |
| int result; |
| |
| #if __ASSUME_32BITUIDS > 0 && defined __NR_setuid32 |
| result = INLINE_SETXID_SYSCALL (setuid32, 1, uid); |
| #else |
| # ifdef __NR_setuid32 |
| if (__libc_missing_32bit_uids <= 0) |
| { |
| int saved_errno = errno; |
| |
| result = INLINE_SETXID_SYSCALL (setuid32, 1, uid); |
| if (result == 0) |
| goto out; |
| if (errno != ENOSYS) |
| return result; |
| |
| __set_errno (saved_errno); |
| __libc_missing_32bit_uids = 1; |
| } |
| # endif /* __NR_setuid32 */ |
| |
| if (uid == (uid_t) ~0 |
| || uid != (uid_t) ((__kernel_uid_t) uid)) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| result = INLINE_SETXID_SYSCALL (setuid, 1, uid); |
| # ifdef __NR_setuid32 |
| out: |
| # endif |
| #endif |
| |
| return result; |
| } |
| #ifndef __setuid |
| weak_alias (__setuid, setuid) |
| #endif |