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.\"     $Id: getsockopt.2,v 1.1 1999/05/24 14:57:04 freitag Exp $
.\"
.\" Modified Sat Jul 24 16:19:32 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified Mon Apr 22 02:29:06 1996 by Martin Schulze (joey@infodrom.north.de)
.\" Modified Tue Aug 27 10:52:51 1996 by Andries Brouwer (aeb@cwi.nl)
.\" Modified Thu Jan 23 13:29:34 1997 by Andries Brouwer (aeb@cwi.nl)
.\" Modified Sun Mar 28 21:26:46 1999 by Andries Brouwer (aeb@cwi.nl)
.\" Modified 1999 by Andi Kleen <ak@muc.de>.
.\"     Removed most stuff because it is in socket.7 now.
.\"
.\" Japanese Version Copyright (c) 1996 Akira Yoshiyama
.\"         all rights reserved.
.\" Translated Sat Jul  6 00:43:37 JST 1996
.\"         by Akira Yoshiyama <yosshy@jedi.seg.kobe-u.ac.jp>
.\" Modified Fri Nov  7 22:45:27 JST 1997
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated Sun Oct 12 JST 2003 by Kentaro Shirakata <argrath@ub32.org>
.\"
.TH GETSOCKOPT 2 1999-05-24 "Linux" "Linux Programmer's Manual"
.SH ̾
getsockopt, setsockopt \- åȤΥץȼԤʤ
.SH 
.nf
.BR "#include <sys/types.h>" "          /* ա׻ */"
.br
.B #include <sys/socket.h>
.sp
.BI "int getsockopt(int " s ", int " level ", int " optname ,
.BI "               void *" optval ", socklen_t *" optlen );
.BI "int setsockopt(int " s ", int " level ", int " optname ,
.BI "               const void *" optval ", socklen_t " optlen );
.fi
.SH 
.BR getsockopt ()

.BR setsockopt ()
ϥåȤ˴Ϣ
.I options
롣ץʣΥץȥ(level)¸ߤ뤫⤷ʤ
Ͼ˺Ǿ̤
.B socket
ؤؤꤵ롣

åȡץݤˤϡץ(level)ȥץ
̾ꤷʤФʤʤåؤǥץ٤ˤϡ
.I level

.B SOL_SOCKET
˻ꤹ롣
¾Ƥؤǥץ٤ˤϡͿ줿ץ
ΤȤʤץȥΥץȥֹꤹ롣㤨С
ץ
.B TCP
ץȥDzᤵ٤Ȥؼˤϡ
.I level

.B TCP
ΥץȥֹꤷʤФʤʤ
.BR getprotoent (3)
򻲾Ȥ뤳ȡ

.I optval

.I optlen
ѥ᡼
.BR setsockopt ()
Υץͤ˥뤿Ѥ롣
.BR getsockopt ()
Ǥ׵ᤷץ֤ͤΥХåեꤹ롣
.BR getsockopt ()
Ǥ
.I optlen
ͤȷξѤΥѥ᡼ǡǽ
.I optval
λؤƤХåեΥͿºݤ֤ͤΥ
񤭴롣⤷ץͤͿ֤⤷ʤˤ
.I optval
 NULL Ǥɤ

.I optname
ӻꤵ줿ץϲᤵ줺ˡŬڤʥץȥ롦⥸塼
ϤƲᤵ롣󥯥롼ɡե
.I <sys/socket.h>
ˤϸҤΥåؤΥץޤޤƤ롣
¾ΥץȥؤǤ̾ϰۤʤ롣
ޥ˥奢Υ 4 Ŭڤʥȥ򻲾Ȥ뤳ȡ

ۤȤɤΥåؤΥץ
.I optval

.I int
ѥ᡼Ѥ롣
.BR setsockopt ()
ǡ(boolean)ץͭ(enable)ˤˤϥʳꤷ
̵(disable)ˤˤϥꤹ롣
.PP
Ѳǽʥåȥץ˴ؤƤϡ
.BR socket (7)
Ŭڤʥץȥ man ڡ򻲾ȤΤȡ
.SH ֤
ˤϥ֤顼ˤ \-1 ֤졢
.I errno
Ŭڤꤵ롣
.SH 顼
.TP 10
.B EBADF

.I s
ͭʥǥץǤʤ
.TP
.B EFAULT
.I optval
ǻꤵ줿ɥ쥹ץΥɥ쥹֤ͭʬǤϤʤ
.BR getsockopt ()
ξ硢
.I optlen
ץΥɥ쥹֤ͭʬǤʤˤ⤳Υ顼֤롣
.TP
.B EINVAL
.BR setsockopt ()

.I option
Ǥ롣
.TP
.B ENOPROTOOPT
ꤵ줿(level)ˤϤΥץ¸ߤʤ
.TP
.B ENOTSOCK

.I s
ϥեǤꡢåȤǤʤ
.SH 
SVr4, 4.4BSD (Υƥࡦ 4.2BSD Ǻǽ˸줿),
POSIX.1-2001.
.\" SVr4 ˤ¾ ENOMEM  ENOSR 顼ɤˤĤƤ⵭ҤƤ롣
.\" 
.\" .BR SO_SNDLOWAT ", " SO_RCVLOWAT ", " SO_SNDTIMEO ", " SO_RCVTIMEO
.\" ץ˴ؤ뵭ҤϤʤ
.SH 
POSIX.1-2001 Ǥ
.I <sys/types.h>
Υ󥯥롼ɤɬܤȤƤ餺
Linux ǤϤΥإåեɬפǤϤʤ
ŪˤϡĤμ (BSD ) ǤΥإåե뤬
ɬפǤꡢܿɬפʥץꥱǤϤΥե
󥯥롼ɤΤǤ

.BR getsockopt ()

.BR setsockopt ()

.I optlen
ϼºݤ
.I int [*]
Ǥ ( 4.x BSD  libc4  libc5 ϤʤäƤ)
POSIX Ǥ;ޤФƸߤ
.I socklen_t
ˤʤäƤꡢ
glibc Ǥ
.I socklen_t
ȤäƤ롣
.BR accept (2)
⻲ȤΤȡ
.SH Х
åȤΥץΤĤϥƥΤ㤤ؤ
٤Ǥ롣
.SH Ϣ
.BR ioctl (2),
.BR socket (2),
.BR getprotoent (3),
.BR protocols (5),
.BR socket (7),
.BR tcp (7),
.BR unix (7)