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.\" Copyright (C), 1994, Graeme W. Wilford. (Wilf.)
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\"
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date. The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein. The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\"
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Fri Jul 29th 12:56:44 BST 1994 Wilf. <G.Wilford@ee.surrey.ac.uk>
.\" Modified 1997-01-31 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified 2002-03-09 by aeb
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Sat Mar 1 16:31:56 JST 1997
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Fri Feb 7 JST 2003 by Kentaro Shirakata <argrath@ub32.org>
.\"
.\"WORD: identity
.\"WORD: effective group ID ¸롼ID
.\"WORD: real group ID ¥롼ID
.\"WORD: saved set-group-ID ¸åȥ롼ID
.\"WORD: implement
.\"WORD: super-user ѡ桼
.\"
.TH SETGID 2 2002-03-09 "Linux 2.5" "Linux Programmer's Manual"
.SH ̾
setgid \- 롼(identity)ꤹ
.SH
.B #include <sys/types.h>
.br
.B #include <unistd.h>
.sp
.BI "int setgid(gid_t " gid );
.SH
.B setgid
ϸߤΥץμ¸(effective)롼ID ꤹ롣
⤷ѡ桼ˤäƸƤӽФ줿ϡ
(real)롼ID ¸(saved)롼ID ꤵ롣
Linux ˤơ
.B setgid
_POSIX_SAVED_IDS ä POSIX ǤΤ褦˼Ƥ롣
suid root Ǥʤ setgid ץˤΥ롼פø
ȤøɬפʤŻμ¸롼ID
ˡǺƤ᤹Ȥ
.SH ֤
ϥ֤롣顼ξ \-1 ֤졢
.I errno
Ŭڤꤵ롣
.SH 顼
.TP
.B EPERM
ƤӽФΥץ˸¤ʤ (CAP_SETGID ѥӥƥʤ)
.I gid
ƤӽФΥץμ¸롼ID ¸åȥ롼ID
ΤɤȤפʤ
.SH
SVr4, SVID.
.SH Ϣ
.BR getgid (2),
.BR setegid (2),
.BR setregid (2),
.BR capabilities (7)
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