'\" te
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.TH SHUTDOWN 3XNET "Jun 10, 2002"
.SH NAME
shutdown \- shut down socket send and receive operations
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR ... ] \fIfile\fR ... \fB-lxnet\fR [ \fIlibrary\fR ... ]
#include <sys/socket.h>

\fBint\fR \fBshutdown\fR(\fBint\fR \fIsocket\fR, \fBint\fR \fIhow\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBshutdown()\fR function disables subsequent \fBsend()\fR and
\fBreceive()\fR operations on a socket, depending on the value of the \fIhow\fR
argument.
.SH PARAMETERS
.sp
.ne 2
.na
\fB\fIhow\fR\fR
.ad
.RS 10n
Specifies the type of shutdown.  The values are as follows:
.sp
.ne 2
.na
\fB\fBSHUT_RD\fR\fR
.ad
.RS 13n
Disables further receive operations.
.RE

.sp
.ne 2
.na
\fB\fBSHUT_WR\fR\fR
.ad
.RS 13n
Disables further send operations.
.RE

.sp
.ne 2
.na
\fB\fBSHUT_RDWR\fR\fR
.ad
.RS 13n
Disables further send and receive operations.
.RE

.RE

.sp
.ne 2
.na
\fB\fIsocket\fR\fR
.ad
.RS 10n
Specifies the file descriptor of the socket.
.RE

.SH RETURN VALUES
.sp
.LP
Upon successful completion, \fBshutdown()\fR returns 0.  Otherwise, \(mi1 is
returned and \fBerrno\fR is set to indicate the error.
.SH ERRORS
.sp
.LP
The \fBshutdown()\fR function will fail if:
.sp
.ne 2
.na
\fB\fBEBADF\fR\fR
.ad
.RS 12n
The \fIsocket\fR argument is not a valid file descriptor.
.RE

.sp
.ne 2
.na
\fB\fBEINVAL\fR\fR
.ad
.RS 12n
The \fIhow\fR argument is invalid.
.RE

.sp
.ne 2
.na
\fB\fBENOTCONN\fR\fR
.ad
.RS 12n
The socket is not connected.
.RE

.sp
.ne 2
.na
\fB\fBENOTSOCK\fR\fR
.ad
.RS 12n
The \fIsocket\fR argument does not refer to a socket.
.RE

.sp
.LP
The \fBshutdown()\fR function may fail if:
.sp
.ne 2
.na
\fB\fBENOBUFS\fR\fR
.ad
.RS 11n
Insufficient resources were available in the system to perform the operation.
.RE

.sp
.ne 2
.na
\fB\fBENOSR\fR\fR
.ad
.RS 11n
There were insufficient STREAMS resources available for the operation to
complete.
.RE

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Standard
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBgetsockopt\fR(3XNET), \fBrecv\fR(3XNET), \fBrecvfrom\fR(3XNET),
\fBrecvmsg\fR(3XNET), \fBselect\fR(3C), \fBsend\fR(3XNET), \fBsendto\fR(3XNET),
\fBsetsockopt\fR(3XNET), \fBsocket\fR(3XNET), \fBattributes\fR(5),
\fBstandards\fR(5)