.\" 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
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.\"
.\"     $Id: send.2,v 1.7 2000/01/13 20:14:13 argrath Exp $
.\"
.\" Modified Sat Jul 24 01:15:33 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified Tue Oct 22 17:55:49 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified Oct 1998 by Andi Kleen
.\"
.\" Japanese Version Copyright (c) 1996 HANATAKA Shinya
.\"         all rights reserved.
.\" Translated Sun Feb 23 12:05:11 JST 1997
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Translated Sun Aug 15 23:23:45 JST 1999
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified Tue Jan 13 01:11:10 JST 2000
.\"         by Kentaro Shirakata <argrath@yo.rim.or.jp>
.\"
.\"WORD:	socket			å
.\"WORD:	message			å
.\"WORD:	protocol		ץȥ
.\"WORD:	non-blocking I/O	 I/O
.\"WORD:	block			(block)
.\"WORD:	out-of-band		Ӱ賰
.\"WORD:	descriptor		ǥץ
.\"WORD:	parameter		ѥ᡼
.\"WORD:	queue			塼
.\"WORD:	buffer			Хåե
.\"WORD:	routing			롼ƥ
.\"WORD:	congestion		
.\"
.TH SEND 2 "July 1999" "Linux Man Page" "Linux Programmer's Manual"
.SH ̾
send, sendto, sendmsg \- åȤإå
.SH 
.B #include <sys/types.h>
.br
.B #include <sys/socket.h>
.sp
.BI "int send(int " s ", const void *" msg ", size_t " len ","
.BI "int " flags );
.br
.BI "int sendto(int " s ", const void *" msg ", size_t " len ","
.BI "int " flags ", const struct sockaddr *" to ", socklen_t " tolen );
.br
 .BI "int sendmsg(int " s ", const struct msghdr *" msg ","
.BI "int " flags );
.SH 
.BR send ,
.BR sendto ,
.B sendmsg
¾Υå(socket)إåžΤ˻Ѥ롣
.B send
ϥåȤ
.I ³줿(connected)
֤ˤˤΤ߻ѤǤ롣
.B sendto

.B sendmsg
ϤĤǤѤǤ롣
.PP
ŪϤΥɥ쥹
.I to
Ȥ礭ꤹ
.I tolen
Ϳ롣åĹ
.IR len
Ϳ롣
⤷åѤץȥưŪ̲᤹ˤĹ᤮ 
.B EMSGSIZE
顼֤졢åžʤ
.PP
.BR send
ǤμԤŪˤϼʤ
ȯ줿顼 \-1 ֤ȤˤäƻŦ롣
.PP
ååȤХåե뤳ȤǤʤ硢
.B send
̾ϥåȤ(non-blocking) I/O ⡼ɤǤʤ(block)롣
ߥ⡼ɤξˤ
.B EAGAIN
֤˥ǡ뤳ȤǽɤĴ٤뤿
.BR select (2)
Ѥ뤳ȤǤ롣
.PP
.I flags
ѥ᡼ϥե饰ǡʲΤΤޤ뤳ȤǤ:
.\" XXX document MSG_PROXY
.TP
.B MSG_OOB
ե饰
.I Ӱ賰(out-of-band)
ǡ򥵥ݡȤ륽å(㤨 
.BR SOCK_STREAM 
)
.I Ӱ賰
ǡ롣̥ץȥ
.I Ӱ賰
ǡ򥵥ݡȤƤɬפ롣
.TP
.B MSG_DONTROUTE
ѥåȤФΤ˥ȥѤ
ľܥͥåȥ³ƤۥȤˤ롣
Ͽ(diagnostic)롼ƥ󥰡ץˤäƤΤ߻Ѥ롣
Ϸϩ椵ץȥեߥ꡼ˤƤ롣
ѥåȥåȤˤƤʤ
.TP
.B MSG_DONTWAIT
֥åͭˤ롣⤷֥å줿ˤ
.B EAGAIN 
֤褦ˤ롣
(Ϥޤ
.BR fcntl(2)

.B F_SETFL

.B O_NONBLOCK
ꤹ뤳ȤˤäƤͭˤǤ)
.TP
.B MSG_NOSIGNAL
ȥ꡼ظΥåȤ¦³Ǥˡ顼Ȥ
.B SIGPIPE 
ʤ褦׵᤹롣ξǤ
.B EPIPE
֤롣
.PP
.I msghdr
¤ΤƤˤĤƤ
.BR recv (2)
򻲾Ȥ뤳ȡ
.I msg_control 

.I msg_controllen 
СѤ뤳ȤǤ롣
ͥνǤХåեκĹϡåȤ
.B net.core.optmem_max 
 sysctl ¤Ƥ롣
.BR socket (7)
򻲾Ȥ뤳ȡ
.SH ֤
Υä饯ο֤顼ä
\-1 ֤롣
.SH 顼
ϥåؤȯŪʥ顼Ǥ롣ؤ
ץȥ롦⥸塼뤫֤¾Υ顼뤫⤷ʤ
줾Υޥ˥奢򻲾Ȥ뤳ȡ
.TP
.B EBADF
̵ʥǥץ(descriptor)ꤵ줿
.TP
.B ENOTSOCK

.I s
åȤǤʤ
.TP
.B EFAULT
桼֤Ȥʥɥ쥹ѥ᡼Ȥƻꤵ줿
.TP
.B EMSGSIZE
åȤåưŪž褦˵줿å
礭᤮뤿ԲǽǤ롣
.TP
.BR EAGAIN " ޤ " EWOULDBLOCK
åȤ(non-blocking)ꤵƤꡢ
׵ᤵ줿(block)
.TP
.B ENOBUFS
ͥåȥ󥿡եΤνϥ塼(queue)դǤ롣
ϰ̤˰Ū(congestion)Τ˥󥿡ե
ߤƤ뤳Ȥ̣롣
( Linux ǤȯʤǥХΥ塼Сե
ˤϥѥåȤۤäƼΤƤ)
.TP
.B EINTR
ʥ뤬ȯ
.TP
.B ENOMEM
꤬­ʤ
.TP
.B EINVAL
ʰϤ줿
.TP
.B EPIPE
³ظΥåȤǥüĤ(shutdown)Ƥ롣
ξˤ
.B MSG_NOSIGNAL 
ꤵƤʤСץƱ
.B SIGPIPE 
롣
.SH 
4.4BSD, SVr4, POSIX 1003.1g draft 
(δؿ 4.2BSD Ǻǽ˸줿)
.SH 
嵭Υץȥפ Single Unix Specification ˽äƤ롣
glibc2 ƱͤǤ롣
.I flags
 BSD 4.* Ǥ int Ǥꡢlibc4  libc5 Ǥ unsigned int Ǥ롣
.I len
 BSD 4.*  libc4 Ǥ int Ǥꡢlibc5 Ǥ `size_t' Ǥ롣
.I tolen
 BSD 4.*  libc4  libc5 Ǥ `int' Ǥ롣
.BR accept (2)
򻲾Ȥ뤳ȡ
.SH Ϣ
.BR fcntl (2),
.BR recv (2),
.BR select (2),
.BR getsockopt (2),
.BR sendfile (2),
.BR socket (2),
.BR write (2),
.BR socket (7),
.BR ip (7),
.BR tcp (7),
.BR udp (7)