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/* 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, see
<http://www.gnu.org/licenses/>. */
#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
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