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/* Copyright (C) 1998, 2000 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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 <linux/posix_types.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include "kernel-features.h"
#ifdef __NR_setresuid
extern int __syscall_setresuid (__kernel_uid_t rgid, __kernel_uid_t egid,
__kernel_uid_t sgid);
# ifdef __NR_setresuid32
extern int __syscall_setresuid32 (__kernel_uid32_t rgid, __kernel_uid32_t egid,
__kernel_uid32_t sgid);
# 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)
{
# if __ASSUME_32BITUIDS > 0
return INLINE_SYSCALL (setresuid32, 3, ruid, euid, suid);
# else
# ifdef __NR_setresuid32
if (!__libc_missing_32bit_uids)
{
int result;
int saved_errno = errno;
result = INLINE_SYSCALL (setresuid32, 3, ruid, euid, suid);
if (result == 0 || errno != ENOSYS)
return result;
__set_errno (saved_errno);
__libc_missing_32bit_uids = 1;
}
# endif /* __NR_setresuid32 */
if ((ruid != (uid_t) -1 && ruid != (uid_t) (__kernel_uid_t) ruid)
|| (euid != (uid_t) -1 && euid != (uid_t) (__kernel_uid_t) euid)
|| (suid != (uid_t) -1 && suid != (uid_t) (__kernel_uid_t) suid))
{
__set_errno (EINVAL);
return -1;
}
return INLINE_SYSCALL (setresuid, 3, ruid, euid, suid);
# endif
}
weak_alias (__setresuid, setresuid)
#endif
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