SHUTDOWN(P) POSIX Programmer's Manual SHUTDOWN(P)NAMEshutdown - shut down socket send and receive operations
SYNOPSIS
#include <sys/socket.h>
int shutdown(int socket, int how);
DESCRIPTION
The shutdown() function shall cause all or part of a full-duplex con‐
nection on the socket associated with the file descriptor socket to be
shut down.
The shutdown() function takes the following arguments:
socket Specifies the file descriptor of the socket.
how Specifies the type of shutdown. The values are as follows:
SHUT_RD
Disables further receive operations.
SHUT_WR
Disables further send operations.
SHUT_RDWR
Disables further send and receive operations.
The shutdown() function disables subsequent send and/or receive opera‐
tions on a socket, depending on the value of the how argument.
RETURN VALUE
Upon successful completion, shutdown() shall return 0; otherwise, -1
shall be returned and errno set to indicate the error.
ERRORS
The shutdown() function shall fail if:
EBADF The socket argument is not a valid file descriptor.
EINVAL The how argument is invalid.
ENOTCONN
The socket is not connected.
ENOTSOCK
The socket argument does not refer to a socket.
The shutdown() function may fail if:
ENOBUFS
Insufficient resources were available in the system to perform
the operation.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOgetsockopt() , read() , recv() , recvfrom() , recvmsg() , select() ,
send() , sendto() , setsockopt() , socket() , write() , the Base Defi‐
nitions volume of IEEE Std 1003.1-2001, <sys/socket.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 SHUTDOWN(P)
