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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" Modified Thu Oct 31 12:04:29 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified, 27 May 2004, Michael Kerrisk <mtk.manpages@gmail.com>
.\" Added notes on capability requirements
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Sat Feb 22 20:28:08 JST 1997
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Sat Feb 10 23:05:31 JST 2001
.\" by Yuichi SATO <sato@complex.eng.hokudai.ac.jp>
.\" Updated & Modified Thu Dec 30 05:28:00 JST 2004
.\" by Yuichi SATO <ysato444@yahoo.co.jp>
.\"
.\"WORD: group 롼
.\"WORD: access
.\"WORD: process ץ
.\"WORD: super user ѡ桼
.\"WORD: supplementary group 롼
.\"
.TH GETGROUPS 2 2007-07-26 "Linux" "Linux Programmer's Manual"
.SH ̾
getgroups, setgroups \- 롼 ID ΥꥹȤ/
.SH
.B #include <sys/types.h>
.br
.B #include <unistd.h>
.sp
.BI "int getgroups(int " size ", gid_t " list []);
.sp
.B #include <grp.h>
.sp
.BI "int setgroups(size_t " size ", const gid_t *" list );
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.BR setgroups ():
_BSD_SOURCE
.SH
.TP
.BR getgroups ()
(ƤӽФץ)
.I size
ޤǤ롼 (supplementary group) ID
.I list
֤
δؿƤӽФץμ¸롼 ID
֤ꥹȤ˴ޤޤ뤫ɤϻꤵƤʤ
(Ĥޤꡢץꥱ
.BR getegid (2)
ƤӽФη̤ͤɲá٤Ǥ)
.I size
0 ʤС
.I list
ϽʤΥץ롼 ID ι֤롣
.TP
.BR setgroups ()
Υץ롼 ID ꤹ롣
Ŭڤø (Linux Ǥ
.B CAP_SETGID
ѥӥƥ (capability)) ɬפǤ롣
.SH ֤
.TP
.BR getgroups ()
ϡ롼 ID ο֤
顼ξ \-1 ֤
.I errno
Ŭڤꤵ롣
.TP
.BR setgroups ()
0 ֤롣顼ʤ \-1 ֤졢
.I errno
Ŭڤꤵ롣
.SH 顼
.TP
.B EFAULT
.I list
ʥɥ쥹Ǥ롣
.TP
.B EINVAL
.BR setgroups ()
ǡ
.I size
.B NGROUPS
(Linux 2.0.32 Ǥ 32)
礭
.BR getgroups ()
ξ
.I size
롼 ID ο꾮 0 Ǥʤ
.TP
.B EPERM
ƤӽФץˤ
.BR setgroups ()
ƤӽФνʬøʤ
.SH
SVr4, 4.3BSD.
.BR getgroups ()
ؿ POSIX.1-2001 ˽Ƥ롣
.BR setgroups ()
øɬפȤ뤿ᡢPOSIX.1-2001 ˽äƤʤ
.SH
ץϡ¸롼 ID ˲ä
.B NGROUPS_MAX
ޤǤ롼 ID ĤȤǤ롣
롼 ID ΥåȤϿƥץѾ뤬
.BR setgroups ()
ȤäѹǤ롣
롼 ID κ
.BR sysconf (3)
ȤäưʲΤ褦ˤĴ٤뤳ȤǤ:
.nf
long ngroups_max;
ngroups_max = sysconf(_SC_NGROUPS_MAX);
.fi
.BR getgroups ()
֤ͤκͤϡˡ줿Ͱʲˤʤ롣
.SH Ϣ
.BR getgid (2),
.BR setgid (2),
.BR initgroups (3),
.BR capabilities (7)
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