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.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" (c) 1993 by Thomas Koenig (ig25@rz.uni-karlsruhe.de)
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\" License.
.\"
.\" Modified Sat Jul 24 13:30:06 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified Sun Aug 21 17:42:42 1994 by Rik Faith <faith@cs.unc.edu>
.\"          (Thanks to Koen Holtman <koen@win.tue.nl>)
.\" Modified Wed May 17 15:54:12 1995 by Rik Faith <faith@cs.unc.edu>
.\"           To remove *'s from status in macros (Thanks to Michael Shields).
.\" Modified as suggested by Nick Duffek <nsd@bbc.com>, aeb, 960426
.\" Modified Mon Jun 23 14:09:52 1997 by aeb - add EINTR.
.\" Modified Thu Nov 26 02:12:45 1998 by aeb - add SIGCHLD stuff.
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\"         all rights reserved.
.\" Translated Tue Mar  4 00:14:47 JST 1997
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified Sun Sep 28 20:37:28 JST 1997
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified Tue Dec  1 00:13:44 JST 1998
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\"
.\"WORD:	process			ץ
.\"WORD:	signal			ʥ
.\"WORD:	signal handling		ʥ
.\"WORD:	suspend			(suspend)
.\"WORD:	zombie			(zombie)
.\"WORD:	child process		ҥץ
.\"WORD:	process group		ץ롼
.\"WORD:	process group ID	ץ롼ID
.\"WORD:	stop			(stop)
.\"WORD:	macro			ޥ
.\"WORD:	effective user ID	¸桼ID
.\"WORD:	block			ػ(block)
.\"
.TH WAIT 2  "23 June 1997" "Linux" "Linux Programmer's Manual"
.SH ̾
wait, waitpid \- ץ(process)νλԤ
.SH 
.B #include <sys/types.h>
.br
.B #include <sys/wait.h>
.sp
.BI "pid_t wait(int *" "status" ")"
.br
.BI "pid_t waitpid(pid_t " pid ", int *" status ", int " options );
.SH 
.B wait
ؿϻҶλ(exit)롢뤤ϸߤΥץʥ
Ȥäƽλ뤫ʥؿ(signal handling function)ƤӽФ
ޤǸߤΥץμ¹Ԥ(suspend)롣⤷ƤӽФ
˴˻ҥץλƤ("(zombie)"ץȸƤФ) 
ˤϤδؿϤ˽λ롣ҥץˤäƻѤƤ
ƥλ񸻤Ʋ롣

.B waitpid
ؿϰ
.I pid
ǻꤵ줿Ҷλ롢뤤ϸߤΥץʥ
Ȥäƽλ뤫ʥؿƤӽФޤǸߤΥץ
¹Ԥߤ롣⤷ƤӽФ줿˴
.I pid
ǻꤵ줿ҥץλƤ(ӡץȸƤФ)
ˤϤδؿϤ˽λ롣ҥץˤäƻѤƤ
λ񸻤Ʋ롣

.I pid
ͤϰʲΤɤ줫:
.IP "< \-1"
 ץ롼(process group)ID ͤ
.IR pid 
ҥץɤ줫λޤǤԤĤȤ̣롣
.IP \-1
ϻҥץΤɤ줫λޤԤĤȤ̣; 
.BR wait
θƤӽФǤ롣
.IP 0
ϥץ롼ID ƤӽФץʻҥץԤ
Ȥ̣롣
.IP "> 0"
ϥץID  
.IR pid
ҥץԤĤȤ̣롣
.PP
.I options
ͤϰʲƤΥİʾΥӥåORǤ:
.TP
.B WNOHANG
Ϥ⤷ԤĤ٤ҥץ¸ߤʤˤϤ֤뤳Ȥ̣롣
.TP
.B WUNTRACED
ϻҶ(stop)Ƥˤ֤뤳Ȥ̣롣
(status)𤵤ʤ
.PP
.I status
 
.BR NULL 
ǤʤʤС
.B wait
ޤ
.B waitpid

.IR status
ǻꤵ줿˾(status)Ǽ롣

ξ֤ϰʲΥޥ(macro)ȤäɾǤ(Υޥϰ
 \(em ֥ХåեؤΥݥ󥿡Ǥʤ \(em ֥Хåե
(\fBint\fR) ):
.TP
.BI WIFEXITED( status )
Ϥ⤷Ҷ̾˽λˤϥʳǤ롣
.TP
.BI WEXITSTATUS( status )
Ͻλҥץ
.B exit
ƤӽФΰ main ؿǼ¹Ԥ줿
.B return
ʸΰꤵ롣Υޥ
.B WIFEXITED
ǤʤɾǤ롣
.TP
.BI WIFSIGNALED( status )
ϻҥץ(catch)Ƥʤʥˤäƽλ˿(true)
֤
.TP
.BI WTERMSIG( status )
ϻҥץλʥֹ֤Υޥ
.B WIFSIGNALED
ʳξΤɾǤ롣
.TP
.BI WIFSTOPPED( status )
Ϥ⤷֤äƤͳȤʤäҥץ(stop)Ƥ
˿֤
.BR WUNTRACED 
ѤˤΤߤꤨ롣
.TP
.BI WSTOPSIG( status )
ϻҶߤʥֹ֤Υޥ
.B WIFSTOPPED
ʳξΤɾǤ롣
.SH ֤
λҶΥץ ID ֤롢顼ξ \-1 
.B WNOHANG
ѤƤŬڤʻҶ¸ߤʤˤ 0 ֤롣
(ξˤ
.I errno
Ŭڤꤵ롣)
.SH 顼
.TP
.B ECHILD
.I pid
ǻꤷץ¸ߤʤƤӽФץλҥץǤʤ
(SIGCHLD  SIG_IGN ꤷˤϼʬλҶǤ⤳ʤ롣)
.TP
.B EINVAL
.I options
Ǥ롣
.TP
.B ERESTARTSYS
.B WNOHANG
ꤵƤʤƶػ(block)Ƥʤʥ
.B SIGCHLD
Υ顼ϥƥࡦ뤫֤롣
饤֥꡼󥿡ե
.BR ERESTARTSYS 
֤ȤƤʤ
.BR EINTR 
֤롣
.SH 
Single Unix Specification ˤ(Linux ˤ¸ߤʤ) SA_NOCLDWAIT ե饰
ˤĤƤεҤ롣Υե饰ꤵƤ뤫SIGCHLD ưȤ
SIG_IGN ꤵ줿(Ǥ POSIX ǤϵƤʤ)ˤ
λҥץϥ(zombie)ˤʤ뤳Ȥʤ
.I wait()

.I waitpid()
ƤӽФȻҥץλޤ(block)롣
.I errno
 ECHILD ꤵƼԤ롣
.SH 
SVr4, POSIX.1
.SH Ϣ
.BR signal (2),
.BR wait4 (2),
.BR signal (7)