.\" Copyright (c) 1980, 1991 Regents of the University of California.
.\" All rights reserved.
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\"    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
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\"
.\"     @(#)lseek.2	6.5 (Berkeley) 3/10/91
.\"
.\" Modified Fri Jul 23 22:17:00 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified 10 June 1995 by Andries Brouwer <aeb@cwi.nl>
.\" Modified Thu Oct 31 15:18:33 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified Sat Jan 17 13:00:32 MET 1998 by Michael Haardt
.\"   <michael@cantor.informatik.rwth-aachen.de>
.\" Modified Mon Sep 24 16:18:02 CEST 2001 by Michael Haardt <michael@moria.de>
.\"
.\" Japanese Version Copyright (c) 1997-1998 HANATAKA Shinya
.\"         all rights reserved.
.\" Translated 1997-02-23, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified 1998-05-11, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated 2001-12-14, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2003-09-08, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2005-02-24, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2006-03-05, Akihiro MOTOKI, catch up to LDP v2.25
.\"
.\"WORD:	end-of-file		եνü(end-of-file)
.\"
.TH LSEEK 2 2001-09-24 "Linux" "Linux Programmer's Manual"
.SH ̾
lseek \- եɤ߽񤭥եåȤΰ֤Ѥ
.SH 
.B #include <sys/types.h>
.br
.B #include <unistd.h>
.sp
.BI "off_t lseek(int " fd ", off_t " offset ", int " whence );
.SH 
.BR lseek ()
ؿϡեǥץ (descriptor)
.I fd
б륪ץ󤵤줿եΥեåȤ
.IR  whence
˴Ť
.I offset
ΰ֤ذʲΤ褦ѹ:
.TP
.B SEEK_SET
եåȤ
.I offset
ХȤꤵ롣
.TP
.B SEEK_CUR
եåȤϸ֤߰
.I offset
ХȤ­֤ˤʤ롣
.TP
.B SEEK_END
եåȤϥեΥ
.I offset
ХȤ­֤ˤʤ롣
.PP
.BR lseek ()
ؿϡեåȤե֤ۤǤ
(âˤեΥѤʤ)
⤷ǡΥեåȰְʹߤ˽񤭹ޤ줿硢
֤ζʬ (" (hole)") ɤ߽Фȡ
ºݤˤ˥ǡ񤭹ޤޤǤ
NULL Х ('\\0') ֤롣
.SH ֤
硢
.BR lseek ()
Ϸ̤Υե֤եƬΥХȿ֤
顼ξ硢ͤȤ \fI(off_t)\ \-1\fP ֤
.I errno
˥顼ؼ롣
.SH 顼
.TP
.B EBADF
.I fd
ץ󤵤줿եǥץǤʤ
.TP
.B EINVAL
.I whence

.BR SEEK_SET ,
.BR SEEK_CUR ,
.B SEEK_END
ΤɤǤʤ
ޤϡseek η̡ե롦եåȤˤʤäƤޤ
seek ǽʥǥХۤƤޤ
.\" ƥˤäƤϥ饯ǥХ⡼ȥե륷ƥФ
.\" ΥեåȤ뤫⤷ʤ
.B EOVERFLOW
.\" ξ HP-UX 11  EINVAL ֤ (POSIX.1  EOVERFLOW ֤)
̤Υե롦եåȤ
.I off_t
ɽ뤳ȤǤʤ
.TP
.B ESPIPE
.I fd
ѥסåȡFIFO 򻲾ȤƤ롣
.SH 
SVr4, 4.3BSD, POSIX.1-2001.
.SH 
ʸϤǻѤ
.I whence
ϱѸȤʤ
ŪͳˤꤽΤޤ޻ȤƤ롣

ĤΥǥХǤ seek Ǥʤ
POSIX ϤɤΥǥХ
.BR lseek ()
б٤ϵꤷƤʤ

Linux Ǥϡ tty ǥХ
.BR lseek ()
Ѥ
\fBESPIPE\fP ֤
.\" ¾ΥƥǤϽ񤭹ޤ줿ʸο֤
.\" SEEK_SET Ѥƥ󥿤ꤹ롣 (񤭹ޤ줿ʸΡ)

ŤɤѴ \fIwhence\fP ͤʲΥޥ֤뤳:
.TS
c c
l l.
old 	new
0	SEEK_SET
1	SEEK_CUR
2	SEEK_END
L_SET	SEEK_SET
L_INCR	SEEK_CUR
L_XTND	SEEK_END
.TE
.PP
֤ͤηϡSVr1-3 Ǥ \fIoff_t\fP ǤϤʤ \fIlong\fP Ǥꡢ
BSD Ǥ \fIint\fP Ǥ롣
.PP
.BR dup (2)

.BR fork (2)
Ǻ줿եǥץϡߤΥե֥ݥ
(current file position pointer) ͭƤΤǡ
Τ褦ʥեǰưԤȶ֤ǽ롣
.SH Ϣ
.BR dup (2),
.BR fork (2),
.BR open (2),
.BR fseek (3),
.BR lseek64 (3),
.BR posix_fallocate (3)