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/* Copyright (C) 1998, 2000, 2003, 2004 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 <sys/types.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include <linux/posix_types.h>
#include "kernel-features.h"
#include <pthread-functions.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_SYSCALL (setuid32, 1, uid);
#else
# ifdef __NR_setuid32
if (__libc_missing_32bit_uids <= 0)
{
int saved_errno = errno;
result = INLINE_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_SYSCALL (setuid, 1, uid);
# ifdef __NR_setuid32
out:
# endif
#endif
#if defined HAVE_PTR__NPTL_SETXID && !defined SINGLE_THREAD
if (result == 0 && __libc_pthread_functions.ptr__nptl_setxid != NULL)
{
struct xid_command cmd;
cmd.syscall_no = __NR_setuid32;
cmd.id[0] = uid;
__libc_pthread_functions.ptr__nptl_setxid (&cmd);
}
#endif
return result;
}
#ifndef __setuid
weak_alias (__setuid, setuid)
#endif
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