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.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" References consulted:
.\" Linux libc source code
.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\" 386BSD man pages
.\" Modified Sat Jul 24 18:20:58 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Fri Feb 14 21:47:50 1997 by Andries Brouwer (aeb@cwi.nl)
.\" Modified 9 Jun 2004, Michael Kerrisk <mtk.manpages@gmail.com>
.\" Changed unsetenv() prototype; added EINVAL error
.\" Noted non-standard behavior of setenv() if name contains '='
.\" 2005-08-12, mtk, glibc 2.3.4 fixed the "name contains '='" bug
.\"
.\" Japanese Version Copyright (c) 1997 HIROFUMI Nishizuka
.\" all rights reserved.
.\" Translated 1997-12-19, HIROFUMI Nishizuka <nishi@rpts.cl.nec.co.jp>
.\" Updated & Modified 2005-02-17, Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated & Modified 2005-10-02, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH SETENV 3 2007-07-26 "GNU" "Linux Programmer's Manual"
.SH ̾
setenv \- Ķѿѹޤɲä
.SH
.nf
.B #include <stdlib.h>
.sp
.BI "int setenv(const char *" name ", const char *" value ", int " overwrite );
.sp
.BI "int unsetenv(const char *" name );
.fi
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.ad l
.BR setenv (),
.BR unsetenv ():
_BSD_SOURCE || _POSIX_C_SOURCE\ >=\ 200112L || _XOPEN_SOURCE\ >=\ 600
.ad b
.SH
.BR setenv ()
ؿϡ\fIname\fP ¸ߤʤ
Ķѿ \fIname\fP \fIvalue\fP ꤷĶɲä롣
\fIname\fP Ķ¸ߤ硢\fIoverwrite\fP 0 ʳʤ
ͤ \fIvalue\fP ѹ\fIoverwrite\fP 0 ʤ
\fIname\fP ͤѹʤ
.PP
.BR unsetenv ()
ؿϡѿ \fIname\fP Ķ롣
.SH ֤
.BR setenv ()
ؿϡ 0 ֤
Ķ˽ʬʶ̵ \-1 ֤
.BR unsetenv ()
ؿϡ 0 ֤
顼ξ \-1 ֤
.I errno
ꤷƥ顼θ
.SH 顼
.TP
.B EINVAL
.I name
'=' ʸޤޤƤ롣
.SH
4.3BSD, POSIX.1-2001.
.SH
glibc 2.2.2 Ǥϡ
.BR unsetenv ()
֤ͤ \fIvoid\fP ΥץȥפǤä
äȺǶ glibc ǤϡֽץǼƤ褦
POSIX.1-2001 ߴΥץȥפǤ롣
.SH Х
POSIX.1-2001 Ǥ
.RI name
'=' ʸޤޤ硢
.BR setenv ()
ϥ顼
.B EINVAL
ǼԤ٤ǤפȽҤ٤Ƥ롣
2.3.4 ΥС glibc Ǥϡ
.I name
'=' ʸޤޤΤƤ롣
.SH Ϣ
.BR clearenv (3),
.BR getenv (3),
.BR putenv (3),
.BR environ (7)
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