| /* Copyright (C) 1998,2000,2002,2003,2004,2005,2006 |
| 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> |
| |
| |
| #if defined __NR_setresuid || defined __NR_setresuid32 |
| |
| # ifdef __NR_setresuid32 |
| # 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_setresuid32 */ |
| |
| int |
| __setresuid (uid_t ruid, uid_t euid, uid_t suid) |
| { |
| int result; |
| |
| # if __ASSUME_32BITUIDS > 0 || !defined __NR_setresuid |
| result = INLINE_SETXID_SYSCALL (setresuid32, 3, ruid, euid, suid); |
| # else |
| # ifdef __NR_setresuid32 |
| if (__libc_missing_32bit_uids <= 0) |
| { |
| int saved_errno = errno; |
| |
| result = INLINE_SETXID_SYSCALL (setresuid32, 3, ruid, euid, suid); |
| if (result == 0) |
| goto out; |
| if (errno != ENOSYS) |
| return result; |
| |
| __set_errno (saved_errno); |
| __libc_missing_32bit_uids = 1; |
| } |
| # endif /* __NR_setresuid32 */ |
| |
| if (((ruid + 1) > (uid_t) ((__kernel_uid_t) -1U)) |
| || ((euid + 1) > (uid_t) ((__kernel_uid_t) -1U)) |
| || ((suid + 1) > (uid_t) ((__kernel_uid_t) -1U))) |
| { |
| __set_errno (EINVAL); |
| return -1; |
| } |
| |
| result = INLINE_SETXID_SYSCALL (setresuid, 3, ruid, euid, suid); |
| # ifdef __NR_setresuid32 |
| out: |
| # endif |
| # endif |
| |
| return result; |
| } |
| libc_hidden_def (__setresuid) |
| #ifndef __setresuid |
| weak_alias (__setresuid, setresuid) |
| #endif |
| |
| #else |
| |
| #include <posix/setresuid.c> |
| |
| #endif |