SHUTDOWN(2) BSD System Calls Manual SHUTDOWN(2)NAME
shutdown — shut down part of a full-duplex connection
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <sys/types.h>
#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 the file descriptor s to be shut down. The how
argument specifies the type of shutdown. Possible values are:
SHUT_RD further receives will be disallowed.
SHUT_WR further sends will be disallowed.
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 shutdown() call fails if:
[EBADF] The s argument is not a valid file descriptor.
[EINVAL] The how argument is invalid.
[ENOTCONN] The socket is not connected.
[ENOTSOCK] The s argument does not refer to a socket.
SEE ALSOconnect(2), socket(2)STANDARDS
The shutdown() function is expected to comply with IEEE Std 1003.1g-2000
(“POSIX.1”), when finalized.
HISTORY
The shutdown() function call appeared in 4.2BSD. The SHUT_RD, SHUT_WR,
and SHUT_RDWR constants appeared in IEEE Std 1003.1g-2000 (“POSIX.1”).
BSD February 27, 2001 BSD
