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.\" Copyright (c) 1983, 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.
.\"
.\" @(#)readlink.2 6.8 (Berkeley) 3/10/91
.\"
.\" Modified Sat Jul 24 00:10:21 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified Tue Jul 9 23:55:17 1996 by aeb
.\" Modified Fri Jan 24 00:26:00 1997 by aeb
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\" all rights reserved.
.\" Translated 1997-12-12, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated 2005-02-10, Yuichi SATO <ysato444@yahoo.co.jp>
.\" Updated 2006-07-19, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>, LDP v2.36
.\"
.\"WORD: symbolic link ܥå
.\"WORD: buffer Хåե
.\"WORD: NUL ̥ʸ
.\"WORD: global variable Хѿ
.\"WORD: directory ǥ쥯ȥ
.\"
.TH READLINK 2 2007-07-26 "Linux" "Linux Programmer's Manual"
.SH ̾
readlink \- ܥåͤɤ
.SH
.B #include <unistd.h>
.sp
.BI "ssize_t readlink(const char *" path ", char *" buf ", size_t " bufsiz );
.sp
.in -4n
glibc εǽޥ
.RB ( feature_test_macros (7)
):
.in
.sp
.ad l
.BR readlink ():
_BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 || _POSIX_C_SOURCE\ >=\ 200112L
.ad b
.SH
.BR readlink ()
.I path
Ϳ줿ܥåƤ
.I buf
ХåեسǼ롢
.I buf
Υ
.I bufsiz
Ǥ롣
.BR readlink ()
NULL ХȤ
.I buf
ɲäʤ
ƤǼΤ˥Хåեϡ
.RI ( bufsiz
ХȤĹ) Ƥڤͤ롣
.SH ֤
ˤϥХåե˳Ǽ줿ʸ֤
顼äˤ \-1 ֤
.I errno
˥顼ɤǼ롣
.SH 顼
.TP
.B EACCES
ѥΥǥ쥯ȥʬ˸ĤͿƤʤ
.RB ( path_resolution (7)
⻲Ȥ뤳)
.TP
.B EFAULT
.I buf
ץ˳Ƥ줿ɥ쥹֤γؤƤ롣
.TP
.B EINVAL
.I bufsiz
Ǥʤ
.TP
.B EINVAL
ꤷե뤬ܥåǤʤ
.TP
.B EIO
ե롦ƥɤ߹ I/O 顼ä
.TP
.B ELOOP
ѥ̾˥ܥå¿롣
.TP
.B ENAMETOOLONG
ѥ̾ѥ̾ΰʬĹ롣
.TP
.B ENOENT
̾Υե뤬¸ߤʤ
.TP
.B ENOMEM
ͥ˽ʬʥ꤬ʤ
.TP
.B ENOTDIR
ѥΥǥ쥯ȥʬǥ쥯ȥǤʤ
.SH
4.4BSD
.RB ( readlink ()
ؿ 4.2BSD Ǹ줿), POSIX.1-2001.
.SH
С 2.4 glibc (С 2.4 ޤ) Ǥϡ
.BR readlink ()
֤ͤη
.I int
ƤߤǤϡ֤ͤη
.I ssize_t
Ǥ (֤
.I ssize_t
POSIX.1-2001 () ɬܤȤʤä)
.SH Ϣ
.BR lstat (2),
.BR readlinkat (2),
.BR stat (2),
.BR symlink (2),
.BR path_resolution (7)
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