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75 lines
1.9 KiB
C
75 lines
1.9 KiB
C
/* Copyright (C) 1998,2000,2003,2004,2006 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, see
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<http://www.gnu.org/licenses/>. */
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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_setregid32
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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_setregid32 */
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int
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__setregid (gid_t rgid, gid_t egid)
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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 (setregid32, 2, rgid, egid);
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#else
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# ifdef __NR_setregid32
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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 (setregid32, 2, rgid, egid);
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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_setregid32 */
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if (((rgid + 1) > (gid_t) ((__kernel_gid_t) -1U))
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|| ((egid + 1) > (gid_t) ((__kernel_gid_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 (setregid, 2, rgid, egid);
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# ifdef __NR_setregid32
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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 __setregid
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weak_alias (__setregid, setregid)
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#endif
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