2004-09-20 02:16:11 +02:00
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/* Copyright (C) 1998, 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
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1998-07-31 20:02:14 +02:00
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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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2001-07-06 06:58:11 +02:00
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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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1998-07-31 20:02:14 +02:00
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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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2001-07-06 06:58:11 +02:00
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Lesser General Public License for more details.
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1998-07-31 20:02:14 +02:00
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2001-07-06 06:58:11 +02:00
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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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1998-07-31 20:02:14 +02:00
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#include <errno.h>
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <unistd.h>
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2003-06-09 00:37:53 +02:00
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#include <sysdep.h>
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1999-05-27 01:37:38 +02:00
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#include "kernel-features.h"
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2004-09-20 02:16:11 +02:00
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#include <pthread-functions.h>
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1999-05-27 01:37:38 +02:00
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#if defined __NR_setresuid || __ASSUME_SETRESUID_SYSCALL > 0
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1998-07-31 20:02:14 +02:00
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1998-08-21 19:22:56 +02:00
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extern int __setresuid (uid_t ruid, uid_t euid, uid_t suid);
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1998-07-31 20:02:14 +02:00
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int
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seteuid (uid_t uid)
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{
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int result;
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if (uid == (uid_t) ~0)
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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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2003-06-10 04:32:35 +02:00
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# if __ASSUME_32BITUIDS > 0 && defined __NR_setresuid32
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2004-09-20 02:16:11 +02:00
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result = INLINE_SYSCALL (setresuid32, 3, -1, uid, -1);
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2003-06-09 00:37:53 +02:00
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# else
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1998-07-31 20:02:14 +02:00
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/* First try the syscall. */
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2004-09-20 02:16:11 +02:00
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result = INLINE_SYSCALL (setresuid, 3, -1, uid, -1);
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# if __ASSUME_SETRESUID_SYSCALL == 0
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1998-07-31 20:02:14 +02:00
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if (result == -1 && errno == ENOSYS)
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/* No system call available. Use emulation. This may not work
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since `setreuid' also sets the saved user ID when UID is not
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equal to the real user ID, making it impossible to switch back. */
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result = __setreuid (-1, uid);
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2004-09-20 02:16:11 +02:00
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# endif
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1999-05-27 01:37:38 +02:00
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# endif
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1998-07-31 20:02:14 +02:00
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2004-09-20 02:16:11 +02:00
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#if defined HAVE_PTR__NPTL_SETXID && !defined SINGLE_THREAD
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if (result == 0 && __libc_pthread_functions.ptr__nptl_setxid != NULL)
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{
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struct xid_command cmd;
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# ifdef __NR_setresuid32
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cmd.syscall_no = __NR_setresuid32;
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# else
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cmd.syscall_no = __NR_setresuid;
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2003-06-09 00:37:53 +02:00
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# endif
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2004-09-20 02:16:11 +02:00
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cmd.id[0] = -1;
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cmd.id[1] = uid;
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cmd.id[2] = -1;
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__libc_pthread_functions.ptr__nptl_setxid (&cmd);
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}
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#endif
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return result;
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1998-07-31 20:02:14 +02:00
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}
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2004-09-20 02:16:11 +02:00
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#ifndef seteuid
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2002-08-13 02:22:49 +02:00
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libc_hidden_def (seteuid)
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2004-09-20 02:16:11 +02:00
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#endif
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1998-07-31 20:02:14 +02:00
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#else
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# include <sysdeps/unix/bsd/seteuid.c>
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#endif
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