.\" 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
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.\"
.\"     @(#)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 Tue Jan 21 21:27:04 JST 1997
.\"       by Takashi Yoshino <tyoshino@eng.toyo.ac.jp>
.\"
.TH POPEN 3  1998-05-07 "BSD MANPAGE" "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 
.B popen()
ؿϡץ򥪡ץ󤹤롣
ѥפեԤ뵯ư롣
塢ѥפĤΤǡ
.I type
ˤɤ߹ߤ񤭹ߤΤɤ餫Ǥ
(ξϻǤʤ)
륹ȥ꡼ϡλбơɤ߼Τ߲Ĥޤ
񤭹ߤΤ߲ĤΤ줫Ȥʤ롣
.PP
.I command
ϥΥޥɥ饤ޤ
null ǽλƤʸؤΥݥ󥿤Ǥ롣
Υޥɤ
.B \-c
ե饰Ѥ
.I /bin/sh
롣
ޥɤβ (⤷ɬפʤ) ΥˤäƹԤ롣
.I mode
ϡ̥ʸǽüʸؤΥݥ󥿤ǡ
ɤ߹ߤξˤ `r'񤭹ߤξˤ `w' ꤹ롣
ʳϻǤʤ
.PP
.B popen()
֤ͤϡ
.BR fclose()
ǤϤʤ
.B pclose()
ĤʤƤϤʤʤȤС
̾ɸ I/O ȥ꡼ƱǤ롣
Υȥ꡼ؽ񤭹̤ϥޥɤɸϤ˽񤭹ޤ롣
ơޥɤɸϤϡ
ޥɤΤΤ֤äƤޤʤ¤ꡢ
.BR popen()
ƤץɸϤƱȤˤʤ롣
դˡ``popened'' (popen()ˤäƳ줿) ȥ꡼फɤ߹ߤϡ
ΥޥɤɸϤɤ߹ळȤˤʤ롣
ơΥޥɤɸϤ
.BR popen
ƤץɸϤƱǤ롣
.PP
ǥեȤǤϡ
.B popen
νϥȥ꡼ϴ˥Хåե󥰤뤳Ȥդ褦
.PP
.B pclose
ؿϡ(ѥפ) ϢŤ줿ץλΤԤ
.BR wait4
ˤä֤줿ޥɤνλ֤֤
.SH ֤
.B popen
ؿϡ
⤷
.BR fork (2)
ޤ
.BR pipe (2)
ƤӽФԤ䡢
դǤʤäˤ
.B NULL
֤
.B wait4
顼֤ꡢ¾Υ顼Ĥäˤϡ
.B pclose
ؿ \-1 ֤
.SH 顼
.B popen
ؿϡꥢ˼ԤƤ
.I errno
򥻥åȤʤ
popen()βˤ
.BR fork() "  " pipe()Ԥˤϡ
.I errno
Ŭڤ˥åȤ롣

.I mode
̵Ǥꡢξ֤Τ줿ˤϡ
.I errno

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

.BR ECHILD
˥åȤ롣
.SH 
POSIX.2
.SH Х
ɤ߹ߤΤ˳줿ޥɤɸϤ
.BR popen() ,
ƤץȰˡɤ߼֤ͭ롣
ΤᡢȤΥץХåե󥰤줿ɤ߼λ顢
Υޥɤϰ֤ͽۤ줿Τˤ
ʤäƤʤ⤷ʤ
Ʊͤˡ񤭹ߤΤ˳줿ޥɤνϤ
ȤΥץνϤȺ礦Ȥˤʤ뤫⤷ʤ
Ԥ
.BR popen

.BR fflush (3)
Ƥ֤Ȥˤä򤱤뤳ȤǽǤ롣
.PP
μ¹ԤμԤ
뤬ޥɤμ¹Ԥ˼ԤȤ
ޥɤζ۵޽λȶ̤Ĥʤ
ͣΥҥȤ
127 νλ֤Ǥ롣
.SH 
.B popen()
ؿ
.B pclose()
ؿ AT&T UNIX  Version 7 Ƴ줿
.SH Ϣ
.BR fork (2),
.BR sh (1),
.BR pipe (2),
.BR wait4 (2),
.BR fflush (3),
.BR fclose (3),
.BR fopen (3),
.BR stdio (3),
.BR system (3)