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.\" (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.\" manual page may be incorrect or out-of-date.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 19:53:02 1993 by Rik Faith (faith@cs.unc.edu)
.\" FIXME Many more values for 'name' are supported, some of which
.\" are documented under 'info confstr'.
.\" See <bits/confname.h> for the rest.
.\" These should all be added to this page.
.\" See also the POSIX.1-2001 specification of confstr()
.\"
.\" Japanese Version Copyright (c) 1997 Hiroaki Nagoya
.\" all rights reserved.
.\" Translated by Hiroaki Nagoya <nagoya@is.titech.ac.jp>
.\" Updated 2005-09-06, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2006-07-20, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v2.36
.\"
.TH CONFSTR 3 2007-07-26 "GNU" "Linux Programmer's Manual"
.SH ̾
confstr \- ե졼˰¸ʸѿμ
.SH
.nf
.B #include <unistd.h>
.sp
.BI "size_t confstr(int " "name" ", char *" buf ", size_t " len );
.fi
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.BR getcwd ():
_POSIX_C_SOURCE\ >=\ 2 || _XOPEN_SOURCE
.SH
.BR confstr ()
ϥե졼˰¸ʸѿͤ롣
.PP
.I name
ϡ䤤碌ƤɽƥѿǤ롣
ʲѿݡȤƤ롣
.TP
.BR _CS_GNU_LIBC_VERSION " (GNU C library ; glibc 2.3.2 ʹ)"
Υƥ GNU C 饤֥ΥСʸ
(㤨 "glibc 2.3.4")
.TP
.BR _CS_GNU_LIBPTHREAD_VERSION " (GNU C library ; glibc 2.3.2 ʹ)"
C 饤֥꤬Ƥ POSIX ʸ
(㤨 "NPTL 2.3.4" "linuxthreads-0.10")
.TP
.B _CS_PATH
٤Ƥ POSIX.2 ɸ桼ƥƥĤ褦
.B PATH
͡
.PP
.I buf
NULL Ǥʤ
.I len
0 Ǥʤ
.BR confstr ()
ϼʸƤ
.I buf
˥ԡ롣ɬפʤĹ
.I len \- 1
ʸڤΤƤơNULL Х ('\\0') ǽü롣
ڤΤƤ줿ɤȽꤹˤϡ
.BR confstr ()
֤ͤ
.I len
ӤФ褤
.PP
.I len
0
.I buf
NULL ʤС
.BR confstr ()
ϰʲ줿 (: ڤΤƤΡʸĹ) ֤
.SH ֤
.I name
ͭʥե졼ѿξ硢
.BR confstr ()
ϤѿΤݻΤɬפǤäХȿ֤
(ʸüΥ̥ХȤޤ)ͤ
.I len
礭Ȥ⤢롣ξˤϡ
.I buf
˳Ǽ줿ͤڤͤ줿Ȥ̣롣
.I name
ͭʥե졼ѿ
ѿͤäƤʤ硢
.BR confstr ()
0 ֤
.I name
ͭʥե졼ѿбƤʤС
.BR confstr ()
0 ֤
.I errno
.B EINVAL
ꤹ롣
.SH 顼
.TP
.B EINVAL
.I name
ͤǤ롣
.SH
POSIX.1-2001
.SH
ʬŪʥɤϡ POSIX.2 ƥΥ桼ƥƥѥ
ΤǤ롣
.br
.nf
.in +4n
char *pathbuf;
size_t n;
n = confstr(_CS_PATH,NULL,(size_t) 0);
pathbuf = malloc(n);
if (pathbuf == NULL)
abort();
confstr(_CS_PATH, pathbuf, n);
.in
.fi
.SH Ϣ
.BR sh (1),
.BR exec (3),
.BR system (3)
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