shutdown(2) - Linux man page

Name

shutdown - shut down part of a full-duplex connection

Synopsis

#include <sys/socket.h>

int shutdown(int s, int how);

Description

The shutdown() call causes all or part of a full-duplex connection on the socket associated with s to be shut down. If how is SHUT_RD, further receptions will be disallowed. If how is SHUT_WR, further transmissions will be disallowed. If how is SHUT_RDWR, further receptions and transmissions will be disallowed.

Return Value

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.

Errors

EBADF: s is not a valid descriptor.
ENOTCONN: The specified socket is not connected.
ENOTSOCK: s is a file, not a socket.

Notes

The constants SHUT_RD, SHUT_WR, SHUT_RDWR have the value 0, 1, 2, respectively, and are defined in <sys/socket.h> since glibc-2.1.91.

Conforming to

POSIX.1-2001, 4.4BSD (the shutdown() function call first appeared in 4.2BSD).

Referenced By

close(2), dccifd(8), lsof(8), recv(2), send(2), socat(1), socket(7), socketcall(2), syscalls(2)