.\" Copyright 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"     @(#)popen.3	6.4 (Berkeley) 4/30/91
.\"
.\" Converted for Linux, Mon Nov 29 14:45:38 1993, faith@cs.unc.edu
.\" Modified Sat May 18 20:37:44 1996 by Martin Schulze (joey@linux.de)
.\" Modified 7 May 1998 by Joseph S. Myers (jsm28@cam.ac.uk)
.\"
.\" Japanese Version Copyright (c) 1997 Takashi Yoshino
.\"       all rights reserved.
.\" Translated 1997-01-21, Takashi Yoshino <tyoshino@eng.toyo.ac.jp>
.\" Modified 2007-05-03, Akihiro MOTOKI
.\"
.TH POPEN 3  1998-05-07 "GNU" "Linux Programmer's Manual"
.SH ̾
popen, pclose \- ץ I/O
.SH 
.B #include <stdio.h>
.sp
.BI "FILE *popen(const char *" command ", const char *" type );
.sp
.BI "int pclose(FILE *" stream );
.SH 
.BR popen ()
ؿϡץ򥪡ץ󤹤롣Ūˤϡ
ѥפեԤư롣
ʬ褦ˡѥפϰʤΤǡ
.I type
ˤɤ߹ߤ񤭹ߤΤɤ餫Ǥ
(ξϻǤʤ)
륹ȥ꡼ϡλбơɤ߼Ѥޤ
񤭹ѤΤ줫Ȥʤ롣
.PP
.I command
ϡΥޥɥ饤ޤ
NULL ü줿ʸؤΥݥ󥿤Ǥ롣
Υޥɤ
.B \-c
ե饰Ѥ
.I /bin/sh
Ϥ롣
ޥɤβ (⤷ɬפʤ) ˤäƹԤ롣
.I type
ϡNULL ü餿ʸؤΥݥ󥿤ǡ
ɤ߹ߤξˤ "r"񤭹ߤξˤ "w" ꤹ롣
ʳϻǤʤ
.PP
.BR popen ()
֤ͤϡ̾ɸ I/O ȥ꡼ƱǤ뤬
.BR fclose (3)
ǤϤʤ
.BR pclose ()
ĤʤƤϤʤʤȤۤʤ롣
Υȥ꡼ؽ񤭹̤ϥޥɤɸϤ˽񤭹ޤ롣
ơޥɤɸϤϡ
ޥɤΤΤ֤äƤޤʤ¤ꡢ
.BR popen ()
ƤץɸϤƱȤˤʤ롣
դˡ"popened"
.RB ( popen ()
ˤäƳ줿) ȥ꡼फɤ߹ߤϡ
ΥޥɤɸϤɤ߹ळȤˤʤ롣
ơΥޥɤɸϤ
.BR popen ()
ƤץɸϤƱǤ롣
.PP
ǥեȤǤϡ
.BR popen ()
νϥȥ꡼ϴ˥Хåե󥰤뤳Ȥդ褦
.PP
.BR pclose ()
ؿϡ(ѥפ) ϢŤ줿ץλΤԤ
.BR wait4 (2)
ˤä֤줿ޥɤνλ֤֤
.SH ֤
.BR popen ()
ؿϡ
.BR fork (2)
ޤ
.BR pipe (2)
ƤӽФԤ䡢
ƤǤʤä硢 NULL ֤
.PP
.BR pclose ()
ؿϡ
.BR wait4 (2)
顼֤ꡢ¾Υ顼Ĥä硢
\-1 ֤
.SH 顼
.BR popen ()
ؿϡꥢ˼ԤƤ
.I errno
򥻥åȤʤ
.BR popen ()
ǸƤӽФ
.BR fork (2)

.BR pipe (2)
Ԥˤϡ
.I errno
Ŭڤ˥åȤ롣

.I type
̵Ǥꡢξ֤Τ줿ˤϡ
.I errno

.B EINVAL
˥åȤ롣
.PP
.BR pclose ()
ҥץξ֤Ǥʤä硢
.I errno

.B ECHILD
˥åȤ롣
.SH 
POSIX.1-2001.
.SH Х
ɤ߹ߤΤ˳줿ޥɤɸϤ
.BR popen (),
ƤץȰˡɤ߼֤ͭ롣
ΤᡢȤΥץХåե󥰤줿ɤ߼λ顢
Υޥɤϰ֤ͽۤ줿Τˤ
ʤäƤʤ⤷ʤ
Ʊͤˡ񤭹ߤΤ˳줿ޥɤνϤϡ
ȤΥץνϤȺ礦Ȥˤʤ뤫⤷ʤ
Ԥ
.BR popen ()

.BR fflush (3)
ƤӽФȤˤäƲǽǤ롣
.PP
μ¹ԤμԤϡ
뤬ޥɤμ¹Ԥ˼ԤȤ䡢
ޥɤ˽λƤޤäȤȡ̤Ĥʤ
ͣΥҥȤϽλ֤ 127 ˤʤ뤳ȤǤ롣
.\" .SH 
.\" .BR popen ()
.\" ؿ
.\" .BR pclose ()
.\" ؿ AT&T UNIX  Version 7 Ƴ줿
.SH Ϣ
.BR sh (1),
.BR fork (2),
.BR pipe (2),
.BR wait4 (2),
.BR fclose (3),
.BR fflush (3),
.BR fopen (3),
.BR stdio (3),
.BR system (3)