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.\" Copyright 1993 Giorgio Ciucci (giorgio@crcc.it)
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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 Tue Oct 22 08:11:14 EDT 1996 by Eric S. Raymond <esr@thyrsus.com>
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Sun Feb 23 16:49:10 JST 1997
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\"
.\"WORD: message å
.\"WORD: queue 塼
.\"WORD: member С
.\"WORD: structure ¤
.\"WORD: effective user-ID ¸桼ID
.\"WORD: creator
.\"WORD: owner ͭ
.\"
.TH MSGCTL 2 "November 1, 1993" "Linux 0.99.13" "Linux Programmer's Manual"
.SH ̾
msgctl \- å
.SH
.nf
.B
# include <sys/types.h>
.B
# include <sys/ipc.h>
.B
# include <sys/msg.h>
.fi
.sp
.BI "int msgctl ( int " msqid ",
.BI "int " cmd ,
.BI "struct msqid_ds *" buf " )"
.SH
δؿ
.IR msqid
ǻꤵ줿å塼(message queue)Ф
.I cmd
ǻꤵ줿Ԥʤ
.I cmd
˻Ȥͤ:
.TP 12
.B IPC_STAT
å塼ǡ¤Τ
.IR buf
ǻꤵ줿¤Τ˥ǡԡ롣
桼ϥå塼Фɤ߹ߵĤäƤʤ
ʤʤ
.TP
.B IPC_SET
.I buf
ǻꤵ줿
.B msqid_ds
¤ΤΥСͤå塼ǡ¤Τ˽ߡ
.B msg_ctime
С롣
.I buf
ǻꤵ줿
.B "msqid_ds ¤"
Υ桼ͿСΤʲΤΤθ:
.nf
.sp
.ft B
msg_perm.uid
msg_perm.gid
msg_perm.mode \fR/* 9 ӥåȤΤ */\fP
msg_qbytes
.fi
.ft R
.sp
ƤӽФƥץμ¸(effective)桼 ID ϥѡ桼
å塼κ(creator)ͭ(owner)Τ줫Ǥʤ
Фʤʤѡ桼Τߤ
.B msg_qbytes
ƥࡦѥ
.BR MSGMNB
Ķꤹ뤳ȤǤ롣
.TP
.B IPC_RMID
å塼ȤΥǡ¤Τ˺롣Ƥ
ɤ߹ߤߤԤäƤץ
(顼Ȥʤ
.B errno
.BR EIDRM
ꤵơ)
Ƴ(awake)롣
ƤӽФץμ¸桼 ID ϥѡ桼
å塼κ(creator)ͭ(owner)Τ줫Ǥʤ
Фʤʤ
.SH ֤
.BR 0
֤롣Ǥʤ
.B \-1
֤졢
.B errno
Υ顼褦ꤵ롣
.SH 顼
Ԥ֤줿
.B errno
˰ʲͤΤɤ줫Ĥꤵ:
.TP 11
.B EACCES
.I cmd
.B IPC_STAT
ƤӽФץå塼
.IR msqid
Фɤ߹ߵĤäƤʤ
.TP
.B EFAULT
.I cmd
.B IPC_SET
.B IPC_STAT
ǡ
.I buf
ǻؤƤ륢ɥ쥹ǽǤʤ
.TP
.B EIDRM
å塼줿
.TP
.B EINVAL
.I cmd
ޤ
.IR msqid
ͤꤵ줿
.TP
.B EPERM
.I cmd
.B IPC_SET
.B IPC_RMID
ǡƤӽФץμ¸桼 ID Υޥɤ¹Ԥ
ʤϥѡ桼ʳΥץ
.B msg_qbytes
ƥࡦѥ
.BR MSGMNB
ǻꤵ줿ͤĶä褦ȤˤȯȤդ뤳ȡ
.SH
.BR IPC_INFO ,
.BR MSG_STAT ,
.B MSG_INFO
楳
.BR ipcs (8)
ץǻγƾ뤿˻ѤƤ롣
Ūˤ proc ե롦ƥࡦեȤ褦
뤫⤷ʤ
.SH
SVr4, SVID. SVID ˤ EIDRM 顼ˤĤƤεҤϤʤ
.SH Ϣ
.BR ipc (5),
.BR msgget (2),
.BR msgsnd (2),
.BR msgrcv (2)
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