mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
192 lines
4.9 KiB
Groff
192 lines
4.9 KiB
Groff
.\" Copyright (c) 2007 Bruce M. Simpson.
|
|
.\" Copyright (c) 1983, 1991, 1993
|
|
.\" 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.
|
|
.\" 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
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" @(#)shutdown.2 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd March 5, 2007
|
|
.Dt SHUTDOWN 2
|
|
.Os
|
|
.Sh NAME
|
|
.Nm shutdown
|
|
.Nd disable sends and/or receives on a socket
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In sys/types.h
|
|
.In sys/socket.h
|
|
.Ft int
|
|
.Fn shutdown "int s" "int how"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn shutdown
|
|
system call disables sends or receives on a socket.
|
|
The
|
|
.Fa how
|
|
argument specifies the type of shutdown.
|
|
Possible values are:
|
|
.Bl -tag -width ".Dv SHUT_RDWR"
|
|
.It Dv SHUT_RD
|
|
Further receives will be disallowed.
|
|
.It Dv SHUT_WR
|
|
Further sends will be disallowed.
|
|
This may cause actions specific to the protocol family of the socket
|
|
.Fa s
|
|
to happen; see
|
|
.Sx IMPLEMENTATION NOTES .
|
|
.It Dv SHUT_RDWR
|
|
Further sends and receives will be disallowed.
|
|
Implies
|
|
.Dv SHUT_WR .
|
|
.El
|
|
.Pp
|
|
If the file descriptor
|
|
.Fa s
|
|
is associated with a
|
|
.Dv SOCK_STREAM
|
|
socket, all or part of the full-duplex connection will be shut down.
|
|
.\"
|
|
.Sh IMPLEMENTATION NOTES
|
|
The following protocol specific actions apply to the use of
|
|
.Dv SHUT_WR
|
|
(and potentially also
|
|
.Dv SHUT_RDWR ) ,
|
|
based on the properties of the socket associated with the file descriptor
|
|
.Fa s .
|
|
.Bl -column ".Dv PF_INET6" ".Dv SOCK_STREAM" ".Dv IPPROTO_SCTP"
|
|
.It Sy Domain Ta Sy Type Ta Sy Protocol Ta Sy Return value and action
|
|
.It Dv PF_INET Ta Dv SOCK_DGRAM Ta Dv IPPROTO_SCTP Ta
|
|
Return \-1.
|
|
The global variable
|
|
.Va errno
|
|
will be set to
|
|
.Er EOPNOTSUPP .
|
|
.It Dv PF_INET Ta Dv SOCK_DGRAM Ta Dv IPPROTO_UDP Ta
|
|
Return 0.
|
|
ICMP messages will
|
|
.Em not
|
|
be generated.
|
|
.It Dv PF_INET Ta Dv SOCK_STREAM Ta Dv IPPROTO_SCTP Ta
|
|
Return 0.
|
|
Send queued data and tear down association.
|
|
.It Dv PF_INET Ta Dv SOCK_STREAM Ta Dv IPPROTO_TCP Ta
|
|
Return 0.
|
|
Send queued data, wait for ACK, then send FIN.
|
|
.It Dv PF_INET6 Ta Dv SOCK_DGRAM Ta Dv IPPROTO_SCTP Ta
|
|
Return \-1.
|
|
The global variable
|
|
.Va errno
|
|
will be set to
|
|
.Er EOPNOTSUPP .
|
|
.It Dv PF_INET6 Ta Dv SOCK_DGRAM Ta Dv IPPROTO_UDP Ta
|
|
Return 0.
|
|
ICMP messages will
|
|
.Em not
|
|
be generated.
|
|
.It Dv PF_INET6 Ta Dv SOCK_STREAM Ta Dv IPPROTO_SCTP Ta
|
|
Return 0.
|
|
Send queued data and tear down association.
|
|
.It Dv PF_INET6 Ta Dv SOCK_STREAM Ta Dv IPPROTO_TCP Ta
|
|
Return 0.
|
|
Send queued data, wait for ACK, then send FIN.
|
|
.El
|
|
.\"
|
|
.Sh RETURN VALUES
|
|
.Rv -std shutdown
|
|
.Sh ERRORS
|
|
The
|
|
.Fn shutdown
|
|
system call fails if:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EBADF
|
|
The
|
|
.Fa s
|
|
argument is not a valid file descriptor.
|
|
.It Bq Er EINVAL
|
|
The
|
|
.Fa how
|
|
argument is invalid.
|
|
.It Bq Er EOPNOTSUPP
|
|
The socket associated with the file descriptor
|
|
.Fa s
|
|
does not support this operation.
|
|
.It Bq Er ENOTCONN
|
|
The
|
|
.Fa s
|
|
argument specifies a
|
|
.Dv SOCK_STREAM
|
|
socket which is not connected.
|
|
.It Bq Er ENOTSOCK
|
|
The
|
|
.Fa s
|
|
argument does not refer to a socket.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr connect 2 ,
|
|
.Xr socket 2 ,
|
|
.Xr inet 4 ,
|
|
.Xr inet6 4
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn shutdown
|
|
system call is expected to comply with
|
|
.St -p1003.1g-2000 ,
|
|
when finalized.
|
|
.Sh HISTORY
|
|
The
|
|
.Fn shutdown
|
|
system call appeared in
|
|
.Bx 4.2 .
|
|
The
|
|
.Dv SHUT_RD , SHUT_WR ,
|
|
and
|
|
.Dv SHUT_RDWR
|
|
constants appeared in
|
|
.St -p1003.1g-2000 .
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
This manual page was updated by
|
|
.An Bruce M. Simpson Aq Mt bms@FreeBSD.org
|
|
to reflect how
|
|
.Fn shutdown
|
|
behaves with
|
|
.Dv PF_INET
|
|
and
|
|
.Dv PF_INET6
|
|
sockets.
|
|
.Sh BUGS
|
|
The ICMP
|
|
.Dq Li "port unreachable"
|
|
message should be generated in response to
|
|
datagrams received on a local port to which
|
|
.Fa s
|
|
is bound
|
|
after
|
|
.Fn shutdown
|
|
is called.
|