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.\" Copyright (C) 1999 Joseph Samuel Myers.
.\"
.\" 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.\" manual page may be incorrect or out-of-date.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.
.\"
.\" Japanese Version Copyright (c) 1999 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Fri Jun 25 23:32:20 JST 1999
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\"
.\"WORD: descriptor ǥץ
.\"WORD: offset եå
.\"WORD: seek
.\"
.TH PREAD 2 1999-01-21 "Linux" "Linux Programmer's Manual"
.SH ̾
pread, pwrite \- ե롦ǥץꤷեåȤɤ߽
.SH
.B #define _XOPEN_SOURCE 500
.sp
.B #include <unistd.h>
.sp
.BI "ssize_t pread(int " fd ", void *" buf ", size_t " count ", off_t " offset );
.sp
.BI "ssize_t pwrite(int " fd ", const void *" buf ", size_t " count ", off_t " offset );
.SH
.BR pread ()
ϥե롦ǥץ
.I fd
(եƬ)եå
.I offset
.I count
ХȤХåե
.I buf
ɤ߹ࡣե롦եåȤѲʤ
.PP
.BR pwrite ()
ϥХåե
.I buf
.I count
ХȤե롦ǥץ
.I fd
Υեå
.I offset
˽ࡣե롦եåȤѲʤ
.PP
.I fd
ǻȤեϥ(seek)ǽǤʤФʤʤ
.SH ֤
硢ɤ߽ԤäХȿ֤롣(ϡ
.BR pwrite ()
ξˤϲʤäȤ̣롣
.BR pread ()
ξˤϥե
κǸãȤ̣) 顼ξ \-1 ֤졢
.I errno
Υ顼褦ꤵ롣
.SH 顼
.BR pread ()
Ǥϡ
.BR read (2)
.BR lseek (2)
ǻꤵ줿ƤΥ顼ȯ
.I errno
ꤹǽ롣
.BR pwrite ()
Ǥϡ
.BR write (2)
.BR lseek (2)
ǻꤵ줿ƤΥ顼ȯ
.I errno
ꤹǽ롣
.SH С
ƥࡦ
.BR pread ()
.BR pwrite ()
Linux ˥С 2.1.60
Dzä줿i386 ΥƥॳΥȥ 2.1.69 Dzä줿
libc ˤ륵ݡȤ(ƥॳʤŤͥǤ
ߥ졼ޤ) glibc 2.1 Dzä줿
.SH
POSIX.1-2001.
.SH Ϣ
.BR lseek (2),
.BR read (2),
.BR write (2),
.BR feature_test_macros (7)
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