mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 17:50:20 +00:00
86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
/* Copyright (C) 1998, 2000, 2002, 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 <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 <sysdeps/generic/setresuid.c>
|
|
|
|
#endif
|