NAME

shutdown — shut down part of a full-duplex connection

SYNOPSIS

#include <sys/socket.h>

int
shutdown(int socket, int how);

DESCRIPTION

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

RETURN VALUES

The shutdown() function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

ERRORS

The call succeeds unless:

[EBADF]

Socket is not a valid descriptor.

[EINVAL]

The how argument is invalid.

[ENOTCONN]

The specified socket is not connected.

[ENOTSOCK]

Socket is a file, not a socket.

SEE ALSO

connect(2), connectx(2), disconnectx(2), socket(2)

HISTORY

The shutdown() function call appeared in 4.2BSD.