shutdown man page

Prolog

This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

shutdown — 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 connection 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 operations 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.

See Also

getsockopt(), pselect(), read(), recv(), recvfrom(), recvmsg(), send(), sendto(), setsockopt(), socket(), write()

The Base Definitions volume of POSIX.1‐2008, <sys_socket.h>

Info

2013 IEEE/The Open Group POSIX Programmer's Manual