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76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
/* Copyright (C) 1998, 2000, 2003, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <unistd.h>
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#include <setxid.h>
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#include <linux/posix_types.h>
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#include "kernel-features.h"
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#ifdef __NR_setreuid32
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# if __ASSUME_32BITUIDS == 0
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/* This variable is shared with all files that need to check for 32bit
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uids. */
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extern int __libc_missing_32bit_uids;
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# endif
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#endif /* __NR_setreuid32 */
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int
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__setreuid (uid_t ruid, uid_t euid)
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{
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int result;
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#if __ASSUME_32BITUIDS > 0
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result = INLINE_SETXID_SYSCALL (setreuid32, 2, ruid, euid);
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#else
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# ifdef __NR_setreuid32
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if (__libc_missing_32bit_uids <= 0)
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{
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int saved_errno = errno;
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result = INLINE_SETXID_SYSCALL (setreuid32, 2, ruid, euid);
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if (result == 0)
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goto out;
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if (errno != ENOSYS)
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return result;
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__set_errno (saved_errno);
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__libc_missing_32bit_uids = 1;
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}
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# endif /* __NR_setreuid32 */
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if (((ruid + 1) > (uid_t) ((__kernel_uid_t) -1U))
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|| ((euid + 1) > (uid_t) ((__kernel_uid_t) -1U)))
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{
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__set_errno (EINVAL);
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return -1;
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}
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result = INLINE_SETXID_SYSCALL (setreuid, 2, ruid, euid);
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# ifdef __NR_setreuid32
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out:
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# endif
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#endif
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return result;
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}
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#ifndef __setreuid
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weak_alias (__setreuid, setreuid)
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#endif
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