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.\" Copyright 1993 Rickard E. Faith (faith@cs.unc.edu)
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.\" Modified 1997-01-31 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified 1998, 1999 by Andi Kleen
.\" Modified 2004-06-23 by Michael Kerrisk <mtk-manpages@gmx.net>
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.\" Japanese Version Copyright (c) 1996 Yosiaki Yanagihara
.\"         all rights reserved.
.\" Translated 1996-06-25, Yosiaki Yanagihara <yosiaki@bsd2.kbnes.nec.co.jp>
.\" Modified 1997-11-06, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified 1999-08-14, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified 2000-01-13, Kentaro Shirakata <argrath@yo.rim.or.jp>
.\" Modified 2005-02-23, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH CONNECT 2 2004-06-23 "Linux 2.6.7" "Linux Programmer's Manual"
.SH ̾
connect \- åȤ³Ԥ
.SH 
.B #include <sys/types.h>
.br
.B #include <sys/socket.h>
.sp
.BI "int connect(int " sockfd ", const struct sockaddr *" serv_addr ,
.BI "socklen_t " addrlen );
.SH 
ե롦ǥץ
.I sockfd
ϥåȤ򻲾ȤƤʤФʤʤ
åȤ
.B SOCK_DGRAM
ξ硢ɥ쥹
.I serv_addr
ϥǡǥեȤΰǤꡢΥɥ쥹
ǡΤߤ롣åȤ
.B SOCK_STREAM
ޤ
.B SOCK_SEQPACKET
ξ硢ΥƥॳϤ⤦ΥåȤȤ³
Ω褦Ȼߤ롣ΥåȤ
.I serv_addr
ǻꤹ롣
.BR serv_addr
ϥåȤ̿ɥᥤΥɥ쥹Ǥ롣Υɥ쥹Ĺ
.I addrlen
ǻꤹ롣ġ̿ɥᥤȼˡǥѥ᡼
.I serv_addr
᤹롣
.PP
Ūˡ³ظ (connection-oriented) ץȥǤϰ٤
.B connect
롣
³ (connectionless) ץȥǤбѹ뤿˲٤
.B connect
ѤǤ롣
³åȤ
.B sockaddr

.I sa_family
Ф
.B AF_UNSPEC
ꤹ뤳Ȥǡ³ɥ쥹бä뤳ȤǤ롣
.SH ֤
³ޤбŤȥ֤
Ԥ \-1 ֤
.I errno
Ŭڤͤꤹ롣
.SH 顼
ʲϰŪʥåȤˤĤƤΥ顼Ǥ롣¾˥ɥᥤͭΥ顼
ȯǽ롣
.TP
.B EACCES
Unix ɥᥤ󥽥åȤϥѥ̾Ǽ̤롣
åȡեؤν񤭹ߵĤʤäѥ̾
ãޤǤΥǥ쥯ȥΤ줫Ф븡Ĥʤä
.RB ( path_resolution (2)
⻲ȤΤ)
.TP
.B EACCES, EPERM
åȤΥ֥ɥ㥹ȡե饰ͭˤʤäƤʤΤ
桼֥ɥ㥹Ȥ³ߤޤϡΥե
§ˤ³׵᤬Ԥ
.TP
.B EADDRINUSE
륢ɥ쥹˻ѤƤ롣
.TP
.B EAFNOSUPPORT
Ϥ줿ɥ쥹
.I sa_family
եɤɥ쥹եߥ꡼ǤϤʤ
.TP
.B EAGAIN
ѲǽʥΥݡȤʤ
롼ƥ󥰥å˽ʬʥȥ꤬ʤ
.B PF_INET
ξˡɤäƥݡȤ䤹˴ؤƤ
.BR ip (7) 

.B net.ipv4.ip_local_port_range
sysctl 򻲾ȤΤȡ
.TP
.B EALREADY
åȤ (non-blocking) ꤵƤꡢ
³λƤʤ
.TP
.B EBADF
եǥץǥץơ֥
ͭʥǥåǤϤʤ
.TP
.B ECONNREFUSED
⡼ȥɥ쥹³ԤäƤץबʤ
.TP
.B EFAULT
åȹ¤ΤΥɥ쥹桼Υɥ쥹ֳˤ롣
.TP
.B EINPROGRESS
åȤ (non-blocking) ꤵƤơ³򤹤
λ뤳ȤǤʤξ硢
.BR select (2)

.BR poll (2)
ȤäƤΥåȤ񤭹߲ǽˤʤΤԤĤȤǡ
³δλΤ뤳ȤǤ롣
.B select
ǽ񤭹߲ǽˤʤäˡ
.BR getsockopt (2)
Ȥä 
.B SOL_SOCKET
٥ 
.B SO_ERROR
ץɤ߽Ф
Ȥˤꡢ
.B connect 
ԤȽǤǤ롣
ξ
.B SO_ERROR
 0 Ǥꡢ
Ԥξ
.B SO_ERROR
ΥꥹȤˤ뤤줫Υ顼ɤǤꡢ
ˤ꼺Ԥθʬ롣
.TP
.B EISCONN
åȤϴ³ (connect) Ƥ롣
.TP
.B ENETUNREACH
ãǤʤͥåȥǤ롣
.TP
.B ENOTSOCK
եǥץåȤȴϢդƤʤ
.TP
.B ETIMEDOUT
³ߤƤǻڤ (timeout) ˤʤäСƤ
³ʤΤ⤷ʤ
IP åȤǤϡ syncookie СͭˤʤäƤ硢
ॢȤĹʤ礬Τդ뤳ȡ
.SH 
SVr4, 4.4BSD
.RB ( connect
ؿ BSD 4.2 Ǻǽо줷)
SVr4 ǤϡŪʥ顼ɤȤ
.BR EADDRNOTAVAIL , 
.BR EINVAL , 
.BR EAFNOSUPPORT , 
.BR EALREADY , 
.BR EINTR , 
.BR EPROTOTYPE , 
.B ENOSR
ɲäƤ롣
ޤܥޥ˥奢ˤϵܤƤʤɲäΥ顼郎¿ܤƤ롣
.SH 
.B connect
λܤΰ BSD 4.*  libc4, libc5 Ʊͤ˼ºݤˤ int Ǥ롣
POSIX Ǥ;ޤФƸߤ socklen_t ˤʤäƤꡢ
glibc Ǥ socklen_t ȤäƤ롣
.BR accept (2)
⻲ȤΤȡ
.SH Х
.B AF_UNSPEC
ɥ쥹ꤷ
.B connect
Ƥ֤Ȥˤ꥽åȤ³ä뵡ǽϤޤƤʤ
.SH Ϣ
.BR accept (2),
.BR bind (2),
.BR getsockname (2),
.BR listen (2),
.BR path_resolution (2),
.BR socket (2)