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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.\" manual page may be incorrect or out-of-date.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>
.\"
.\" 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>
.\"
.\"WORD: group 롼
.\"WORD: access
.\"WORD: process ץ
.\"WORD: super user ѡ桼
.\"WORD: supplementary group 롼
.\"
.TH GETGROUPS 2 "10 December 1997" "Linux 2.0.32" "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 );
.SH
.TP
.B getgroups
.I size
ޤǤ롼 (supplementary group) ID
.IR list
֤
δؿƤӽФץμ¸롼 ID
֤ꥹȤ˴ޤޤ뤫ɤϻꤵƤʤ
(Ĥޤꡢץꥱ
.BR getegid (2)
ƤӽФη̤ͤɲá٤Ǥ)
.I size
ʤС
.I list
ϽʤΥץ롼 ID ι֤롣
.TP
.B setgroups
Υץ롼 ID ꤹ롣ѡ桼Τߤ
δؿѤǤ롣
.SH ֤
.TP
.B getgroups
ϡ롼 ID ο֤
顼ξ \-1 ֤
.I errno
Ŭڤꤵ롣
.TP
.B setgroups
ϥ֤롣顼ʤ \-1 ֤졢
.I errno
Ŭڤꤵ롣
.SH 顼
.TP
.B EFAULT
.I list
ʥɥ쥹Ǥ롣
.TP
.B EPERM
.BR setgroups
ǡ桼ѡ桼Ǥʤ
.TP
.B EINVAL
.BR setgroups
ǡ
.I size
.B NGROUPS
(Linux 2.0.32 Ǥ 32)
礭
.BR getgroups
ξ
.I size
롼 ID ο꾮Ǥʤ
.SH
ץϡ¸롼 ID ˲ä NGROUPS_MAX ޤǤ
롼 ID ĤȤǤ롣
롼 ID ΥåȤϿƥץѾ뤬
.B setgroups
ȤäѹǤ롣
롼 ID κ
.BR sysconf (3)
ȤäưʲΤ褦ˤĴ٤뤳ȤǤ:
.nf
long ngroups_max;
ngroups_max = sysconf(_SC_NGROUPS_MAX);
.fi
.B getgroups
֤ͤκͤϡˡ줿Ͱʲˤʤ롣
.LP
.B setgroups
Υץȥפ
.B _BSD_SOURCE ˤΤͭˤʤ롣
(Ūˤ⤷ϰۤ _POSIX_SOURCE -ansi ե饰
ꤷƥѥ뤷ʤ _BSD_SOURCE ưŪ)
.SH
SVr4, SVID (4 ǤΤ; SVr3 ˤϤΥ¸ߤʤ),
X/OPEN, 4.3BSD
.B getgroups
ؿ POSIX.1 ˽Ƥ롣
.B setgroups
øɬפȤ뤿ᡢPOSIX.1 ˽äƤʤ
.SH Ϣ
.BR initgroups (3),
.BR getgid (2),
.BR setgid (2)
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