290 lines
8.5 KiB
Groff
290 lines
8.5 KiB
Groff
.\" Copyright (c) 1983, 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)recv.2 8.3 (Berkeley) 2/21/94
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.\" %FreeBSD: src/lib/libc/sys/recv.2,v 1.16 2001/10/01 16:09:02 ru Exp %
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.\"
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.\" $FreeBSD$
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.Dd February 21, 1994
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.Dt RECV 2
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.Os
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.Sh ̾¾Î
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.Nm recv ,
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.Nm recvfrom ,
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.Nm recvmsg
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.Nd ¥½¥±¥Ã¥È¤«¤é¥á¥Ã¥»¡¼¥¸¤ò¼õ¿®¤¹¤ë
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.Sh ¥é¥¤¥Ö¥é¥ê
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.Lb libc
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.Sh ½ñ¼°
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.In sys/types.h
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.In sys/socket.h
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.Ft ssize_t
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.Fn recv "int s" "void *buf" "size_t len" "int flags"
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.Ft ssize_t
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.Fn recvfrom "int s" "void *buf" "size_t len" "int flags" "struct sockaddr *from" "socklen_t *fromlen"
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.Ft ssize_t
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.Fn recvmsg "int s" "struct msghdr *msg" "int flags"
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.Sh ²òÀâ
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.Fn recvfrom
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¤È
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.Fn recvmsg
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.Fn recv
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.Pp
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recv ¸Æ¤Ó½Ð¤·¤Ø¤Î
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.Em ( or )
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¤«¤éÀ®¤ê¤Þ¤¹:
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.Bl -column MSG_WAITALL -offset indent
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.It Dv MSG_OOB Ta ¥×¥í¥»¥¹ÂÓ°è³°¥Ç¡¼¥¿
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.It Dv MSG_PEEK Ta Ãå¿®¥á¥Ã¥»¡¼¥¸¤ÎÇÁ¤¸« (peek)
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.El
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.Pp
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.Fn recvmsg
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.Ao Pa sys/socket.h Ac
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.Pp
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.Bd -literal
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struct msghdr {
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caddr_t msg_name; /* ¥¢¥É¥ì¥¹(¥ª¥×¥·¥ç¥ó) */
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u_int msg_namelen; /* ¥¢¥É¥ì¥¹¤Î¥µ¥¤¥º */
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struct iovec *msg_iov; /* ¥¹¥¥ã¥Ã¥¿ / ¥®¥ã¥¶¡¼ÇÛÎó */
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u_int msg_iovlen; /* msg_iov ¤ÎÍ×ÁÇ¿ô */
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caddr_t msg_control; /* Êä½õ¥Ç¡¼¥¿¡¢¸å½Ò */
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u_int msg_controllen; /* Êä½õ¥Ç¡¼¥¿¤Î¥Ð¥Ã¥Õ¥¡Ä¹ */
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int msg_flags; /* ¼õ¿®¤µ¤ì¤¿¥á¥Ã¥»¡¼¥¸¾å¤Î¥Õ¥é¥° */
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};
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.Ed
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.Pp
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¤³¤³¤Ç
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¤È
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.Bd -literal
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struct cmsghdr {
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u_int cmsg_len; /* ¥Ç¡¼¥¿¥Ð¥¤¥È¥«¥¦¥ó¥È¡¢hdr ¤ò´Þ¤à */
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int cmsg_level; /* ¥á¥Ã¥»¡¼¥¸¤òÀ¸À®¤·¤¿¥×¥í¥È¥³¥ë */
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int cmsg_type; /* ¥×¥í¥È¥³¥ë¤Ë¸ÇͤΥ¿¥¤¥× */
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/* u_char cmsg_data[]; ¤¬¸å¤Ë³¤¯ */
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};
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.Pp
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.Dv SCM_CREDS
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.Fa cmsg_data
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.Fa cmsgcred
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.Pp
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.Bd -literal
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struct cmsgcred {
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pid_t cmcred_pid; /* Á÷¿®¥×¥í¥»¥¹¤Î PID */
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uid_t cmcred_uid; /* Á÷¿®¥×¥í¥»¥¹¤Î¼Â UID */
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uid_t cmcred_euid; /* Á÷¿®¥×¥í¥»¥¹¤Î¼Â¸ú UID */
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gid_t cmcred_gid; /* Á÷¿®¥×¥í¥»¥¹¤Î¼Â GID */
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short cmcred_ngroups; /* ¥°¥ë¡¼¥×¤Î¿ô */
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gid_t cmcred_groups[CMGROUP_MAX]; /* ¥°¥ë¡¼¥× */
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};
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.Ed
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.It Bq Er EINTR
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.It Bq Er EFAULT
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.El
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.Sh ´ØÏ¢¹àÌÜ
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.Xr fcntl 2 ,
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.Xr getsockopt 2 ,
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.Xr read 2 ,
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.Xr select 2 ,
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.Xr socket 2
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.Sh Îò»Ë
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.Fn recv
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´Ø¿ô¤Ï
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.Bx 4.2
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