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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 <bp-checks.h>
#include "kernel-features.h"
#ifdef __NR_getresuid
extern int __syscall_getresuid (__kernel_uid_t *__unbounded ruid,
__kernel_uid_t *__unbounded euid,
__kernel_uid_t *__unbounded suid);
# ifdef __NR_getresuid32
extern int __syscall_getresuid32 (__kernel_uid32_t *__unbounded ruid,
__kernel_uid32_t *__unbounded euid,
__kernel_uid32_t *__unbounded suid);
# 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_getresuid32 */
int
getresuid (uid_t *ruid, uid_t *euid, uid_t *suid)
{
# if __ASSUME_32BITUIDS > 0
return INLINE_SYSCALL (getresuid32, 3, CHECK_1 (ruid),
CHECK_1 (euid), CHECK_1 (suid));
# else
__kernel_uid_t k_ruid, k_euid, k_suid;
int result;
# ifdef __NR_getresuid32
if (__libc_missing_32bit_uids <= 0)
{
int r;
int saved_errno = errno;
r = INLINE_SYSCALL (getresuid32, 3, CHECK_1 (ruid),
CHECK_1 (euid), CHECK_1 (suid));
if (r == 0 || errno != ENOSYS)
return r;
__set_errno (saved_errno);
__libc_missing_32bit_uids = 1;
}
# endif /* __NR_getresuid32 */
result = INLINE_SYSCALL (getresuid, 3, __ptrvalue (&k_ruid),
__ptrvalue (&k_euid), __ptrvalue (&k_suid));
if (result == 0)
{
*ruid = (uid_t) k_ruid;
*euid = (uid_t) k_euid;
*suid = (uid_t) k_suid;
}
return result;
# endif
}
#else
# include <sysdeps/generic/getresuid.c>
#endif
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