.\" Copyright (c) 1990, 1991 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek and the American National Standards Committee X3,
.\" on Information Processing Systems.
.\"
.\" 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.
.\"
.\"     @(#)fseek.3	6.11 (Berkeley) 6/29/91
.\"
.\" Converted for Linux, Mon Nov 29 15:22:01 1993, faith@cs.unc.edu
.\"
.\"
.\" Japanese Version Copyright (c) 1998 NAKANO Takeo all rights reserved.
.\" Translated Mon Apr 27 1998 by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\"
.\" WORD: 	file position indicator	եɽ
.\" WORD:	error indicator		顼ɽ
.\"
.TH FSEEK 3  1993-11-29 "GNU" "Linux Programmer's Manual"
.SH ̾
fgetpos, fseek, fsetpos, ftell, rewind \- ȥ꡼ΰ֤ѹ
.SH 
.B #include <stdio.h>
.sp
.BI "int fseek(FILE *" stream ", long " offset ", int " whence );

.BI "long ftell(FILE *" stream );

.BI "void rewind(FILE *" stream );

.BI "int fgetpos(FILE *" stream ", fpos_t *" pos );
.br
.BI "int fsetpos(FILE *" stream ", fpos_t *" pos );
.SH 
.BR fseek ()
ؿ
.I stream
ˤäƻꤵ줿ȥ꡼ˤơեɽ
(file position indicator) 򥻥åȤ롣ʰ (Хñ)

.I whence
ǻꤵ줿֤
.I offset
ХȤä뤳ȤˤäͿ롣
.I whence

.BR SEEK_SET ,
.BR SEEK_CUR ,
.B SEEK_END
Τɤ줫ˤʤäƤϡ줾եƬߤΰɽҡ
եΥեåȤ롣
.BR fseek ()
ؿθƤӽФȡȥ꡼ end-of-file ɽҤ
ꥢ졢ޤǤ
.BR ungetc (3)
ؿᤷǡϤʤäȤˤʤ롣
.PP
.BR ftell ()
ؿ
.I stream
ˤäƻꤵ줿ȥ꡼ˤ롢եɽ
θǤͤͿ롣
.PP
.BR rewind ()
ؿ
.I stream
ˤäƻꤵ줿ȥ꡼ˤơեɽ
եƬ˥åȤ롣δؿϰʲǤ롣
.PP
.RS
(void) fseek(stream, 0L, SEEK_SET)
.RE
.PP

.BR rewind ()
Ǥϥȥ꡼Ф륨顼ɽ (error indicator) Ʊ
ꥢ (
.BR clearerr (3)
򸫤)
.PP
.BR fgetpos ()
ؿ
.BR fsetpos ()
ؿϡ줾
.BR ftell ()

.BR fseek ()

.I whence

.B SEEK_SET
ꤷƱͤεǽ򡢰ۤʤ륤󥿡ե󶡤롣
.BR fgetpos ()
ϥե륪եåȤθߤͤ
.I pos
Ȥ륪֥Ȥ¸
.BR fsetpos ()
ϥե륪եåȤ
.I pos
ꤹ롣
Unix ʳΥƥˤƤϡ
.I fpos_t
¤Τʤɤʣʥ֥ȤˤʤäƤơΥ롼󤬥ƥ
ȥȥ꡼ǥե֤ѹˡΤܿΤͣΤ
ˤʤäƤ⤢롣
.SH ֤
.BR rewind ()
֤ͤʤ
.BR fgetpos (),
.BR fseek (),
.BR fsetpos ()
 0 ֤
.BR ftell ()
ϸߤΥեåȤ֤Ԥ֤ͤ \-1 Ȥʤꡢ
.I errno
˥顼򼨤ͤåȤ롣
.SH 顼
.TP
.B EBADF
ꤷ
.I stream
Ǥʤ
.TP
.B EINVAL
.BR fseek ()
ؿФͿ
.I whence

.BR SEEK_SET ,
.BR SEEK_END ,
.B SEEK_CUR
ʳͤǤä
.PP
.BR fgetpos (),
.BR fseek (),
.BR fsetpos (),
.BR ftell ()
ϡ줾
.BR fflush (3),
.BR fstat (2),
.BR lseek (2),
.BR malloc (3)
ʤɤΥ롼ƤӽФݤ˼Ԥǽ롣ξ
줾б
.I errno
ꤵ롣
.SH 
C89, C99.
.SH Ϣ
.BR lseek (2),
.BR fseeko (3)