.\" 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.
.\"
.\"     @(#)truncate.2	6.9 (Berkeley) 3/10/91
.\"
.\" Modified Sat Jul 24 12:46:33 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Tue Oct 22 22:36:33 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified Mon Dec 21 13:37:05 1998 by Andries Brouwer (aeb@cwi.nl)
.\"
.\" Japanese Version Copyright (c) 1997 SUTO, Mitsuaki
.\"         all rights reserved.
.\" Translated Thu Jun 26 21:14:31 JST 1997
.\"         by SUTO, Mitsuaki <suto@av.crl.sony.co.jp>
.\" Modified Sun Mar 12 16:46:31 JST 2000
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Jan  9 JST 2001 by Kentaro Shirakata <argrath@ub32.org>
.\"
.TH TRUNCATE 2 1998-12-21 "" "Linux Programmer's Manual"
.SH ̾
truncate, ftruncate \- ꤷĹ˥եڤͤ
.SH 
.B #include <unistd.h>
.sp
.BI "int truncate(const char *" path ", off_t " length );
.br
.BI "int ftruncate(int " fd ", off_t " length );
.SH 
.B truncate

.I path
ǻꤵե
.B ftruncate

.I fd
Ǽե
.I length
ХȤĹˤʤ褦˱Ĺ롢⤷ڤͤ롣⤷ڤͤ
Υե뤬
.I length
ĹСlength ХȤۤʬΥǡϼ롣
⤷ڤͤΥե뤬
.I length
ûäϡեѹ줺Τޤޤˤʤ뤫
ꤵ줿Ĺޤǿĥ뤫̤(unspecified)Ǥ롣
(â XSI ΥƥǤϿĥ롣)
ĥ줿ʬɤϥ֤롣
.BR ftruncate 
ǤϥեϽ񤭹Ѥ˥ץ󤵤Ƥɬפ롣

.SH ֤
 0 ֤롣Ԥ \-1 ֤ꡢ
.I errno
顼Ƥ˽äꤵ롣
.SH 顼
.B truncate 
ǤϰʲΥ顼ɤƤ롣
.TP
.B ENOTDIR
path ιܤ˥ǥ쥯ȥǤϤʤΤäƤ롣
.TP
.B ENAMETOOLONG
ѥ̾Υǥ쥯ȥ̾ 255 ʸۤƤ롢⤷ϥѥ̾Τ 
1023 ʸۤƤ롣
.TP
.B ENOENT
ꤵ줿̾Υե뤬¸ߤʤ
.TP
.B EACCES
ѥǻꤵƤǥ쥯ȥ search ĤΤʤΤ롣
(:x ӥåȤΩäƤʤ)
.TP
.B EACCES
ꤵ줿եФ񤭹ߵĤäƤʤ
.TP
.B ELOOP
ѥ᤹̾ݤ˥ܥå󥯤¿
.TP
.B EISDIR
ꤵ줿եϥǥ쥯ȥǤ롣
.TP
.B EROFS
ꤵ줿եɤ߽ФѤΥե륷ƥˤ롣
.TP
.B ETXTBSY
ꤵ줿եϼ¹ԤƤեǤ롣
.TP
.B EIO
inode ι I/O 顼ȯ
.TP
.B EFAULT
.I path
ץ˳ƤƤ륢ɥ쥹֤γؤƤ롣
.PP
.B ftruncate 
ǤϰʲΥ顼ɤƤ롣
.TP
.B EBADF
.I fd
̵ʥǥץ(descripter)Ǥ롣
.TP
.B EINVAL
.I fd
ǻؤƤΤϥեǤϤʤåȤǤ롣
.TP
.B EINVAL
.I fd
ǻؤƤե뤬񤭹Ѥ˥ץ󤵤Ƥʤ
.SH 
4.4BSD, SVr4 (δؿ BSD 4.2 ˻ϤƻȤ줿)
SVr4 ˤ¾Υ顼ɤȤơ
.B truncate
ˤ EINTR, EMFILE, EMULTIHP, ENAMETOOLONG, ENFILE, ENOLINK, ENOTDIR 

.B ftruncate
ˤ EAGAIN  EINTR 줾쵭ҤƤ롣
POSIX ˤ 
.I ftruncate
¸ߤ뤬
.I truncate
¸ߤʤ
.PP
POSIX ʤǤϥե뤬
.IR length
ХȤûäưˤĤƵꤷƤʤ
.SH Х
δؿϡե뤫ڤΤƤХȿǤ褦
̲٤Ǥ롣
.SH Ϣ
.BR open (2)