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.\" Copyright (c) 1983, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\" must display the following acknowledgement:
.\" This product includes software developed by the University of
.\" California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\" may be used to endorse or promote products derived from this software
.\" without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" @(#)setregid.2 6.4 (Berkeley) 3/10/91
.\"
.\" Modified Sat Jul 24 09:08:49 1993 by Rik Faith <faith@cs.unc.edu>
.\" Portions extracted from linux/kernel/sys.c:
.\" Copyright (C) 1991, 1992 Linus Torvalds
.\" May be distributed under the GNU General Public License
.\" Changes: Fri Jul 29 10:56:01 BST 1994 by Wilf. <G.Wilford@ee.surrey.ac.uk>
.\" Tue Aug 2 14:56:48 BST 1994 by Wilf due to change in kernel.
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Fri Dec 12 00:18:45 JST 1997
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\"
.\"WORD: effective user ID ¸桼ID
.\"WORD: real user ID ¥桼ID
.\"WORD: saved user ID ¸桼ID
.\"WORD: super-user ѡ桼
.\"
.TH SETREUID 2 "2nd August 1994" "Linux 1.1.38" "Linux Programmer's Manual"
.SH ̾
setreuid, seteuid \- (real) ¸(effective)桼ID ꤹ
.SH
.B #include <unistd.h>
.sp
.BI "int setreuid(uid_t " ruid ", uid_t " euid );
.br
.BI "int seteuid(uid_t " euid );
.SH
.B setreuid
ϸߤΥץμ(real)桼IDȼ¸(effective)桼ID ꤹ롣
ø桼¥桼ID¸桼IDѲǤ롣
Linux 1.1.37 ϡ
.B setreuid
.B seteuid
Ѥ¸(saved)桼ID ѥϲƤ롣
1.1.37 顢¸桼ID ¸桼ID ꤹ뤳Ȥ
ǽˤʤä
ѡ桼Τߤ¾ѹǤ롣
¥桼ID ¸桼ID \-1 Ϳϡ
ƥϤ ID ѹʤ
ߤǤϡ
.BI seteuid( euid )
ϵǽŪ
.BI setreuid( -1 , " euid" )
Ǥ롣
⤷¥桼ID ѹ줿ꡢ¸桼ID μ¥桼ID
ۤäͤꤵ줿硢¸桼ID ˤϿ¸桼ID ͤ
ꤵ롣
.SH ֤
ϥ֤롣顼ξ \-1 ֤졢
.I errno
Ŭڤꤵ롣
.SH 顼
.TP
.B EPERM
ߤΥץѡ桼Ǥʤѹ
(i) ¸桼ID ȼ¥桼ID 촹롣
(ii) ͤ¾ꤹ롣
(iii) ¸桼ID ¸桼ID ͤꤹ롣
ΤǤʤ
.SH
BSD 4.3. (
.B setreuid
ؿ BSD 4.2 Ǹ줿)
.SH Ϣ
.BR getuid (2),
.BR setuid (2)
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