SHUTDOWN(2)

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).

SEE ALSO
connect(2), socket(2)