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.\" This man page is Copyright (C) 1998 Pawel Krawczyk.
.\" Permission is granted to distribute possibly modified copies
.\" of this page provided the header is included verbatim,
.\" and in case of nontrivial modification author and date
.\" of the modification is added to the header.
.\" $Id: sendfile.2,v 1.7 2001/03/10 18:52:33 argrath Exp $
.\" 2000-11-19 bert hubert <ahu@ds9a.nl>: in_fd cannot be socket
.\"
.\" Japanese Version Copyright (c) 1999 HANATAKA Shinya
.\" all rights reserved.
.\" Translated Sat Jun 26 00:00:15 JST 1999
.\" by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Fri Feb 16 JST 2001 by Kentaro Shirakata <argrath@ub32.org>
.\"
.\"WORD: descriptor ǥץ
.\"WORD: socket å
.\"WORD: lock å
.\"
.TH SENDFILE 2 "1 Dec 1998" "Linux Man Page" "Linux Programmer's Manual"
.SH ̾
sendfile \- ե롦ǥץ֤ǥǡž
.SH
.B #include <sys/sendfile.h>
.sp
.BI "ssize_t sendfile(int" " out_fd" ", int" " in_fd" ", off_t *" offset ", size_t" " count" );
.SH
ΥƥॳϤե롦ǥץ̤
ե롦ǥץإǡԡ롣
ޤξΥե롦ǥץåȤǤʤ
(âʲȤΤ)
.I in_fd
ɤ߹ߤΤ˥ץ줿ե롦ǥץ
ʤФʤ餺
.I out_fd
ϽߤΤ˥ץ줿ǥץǤʤФʤʤ
.I offset
.BR sendfile ()
ϥեΤɤǡɤϤ뤫ؤΥݥǤ롣
.BR sendfile ()
λѿ˺Ǹɤ߹ޤ줿ХȤ
ΥХȤΥեåȤޤ롣
.I count
ϥե롦ǥץ֤ԡХȿǤ롣
ΥԡϥͥǹԤΤǡ
.BR sendfile ()
ϥ桼֤Ȥδ֤ǥǡž뤿˻֤Ȥɬפʤ
.SH
sendfile
.IR in_fd
θߤΥե롦ݥѹʤ
.IR out_fd
Υե롦ݥѹ롣
⤷ TCP åȤ˥ե뤿 sendfile Ȥȷײ褷Ƥꡢ
եƤ˥إåǡդäɬפ
ѥåȤοǾˤƸΨ夲뤿
.BR tcp (7)
˵ҤƤ
.B TCP_CORK
ץȤȤ褤
ΤȤǡɤ߽ФǥץϥåȤȷӤĤƤƤϤʤ餺
mmap()եȷӤĤƤʤФʤʤ
.SH ֤
ž
.I out_fd
˽ޤ줿Хȿ֤롣顼ξ \-1 ֤졢
.I errno
Ŭڤͤꤵ롣
.SH 顼
.TP
.B EBADF
ϥե뤬ɤ߹ߤΤ˥ץƤʤ
ϥե뤬ߤΤ˥ץƤʤ
.TP
.B EINVAL
ǥץͭǤʤå(lock)Ƥ롣
.TP
.B ENOMEM
.I in_fd
ɤ߹िνʬʥ꤬ʤ
.TP
.B EIO
.I in_fd
ɤ߹Ǥ뤦ͽʤ顼
.SH С
.B sendfile
Linux 2.2 οǽǤ롣
롼ɥե <sys/sendfile.h> glibc2.1 ¸ߤƤ롣
¾ Unix ǤϤФаۤʤäץȥפ
.B sendfile
Ƥ롣ܿθץǤϻѤƤϤʤʤ
.SH Ϣ
.BR socket (2),
.BR open (2)
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