SHUTDOWN(2) System Programmer's Manual SHUTDOWN(2)
NAME
shutdown - shut down part of a full-duplex connection
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 s to be shut down. If how is SHUT_RD, further re-
ceives will be disallowed. If how is SHUT_WR, further sends will be dis-
allowed. If how is SHUT_RDWR, further sends and receives will be disal-
lowed.
RETURN VALUES
A 0 is returned if the call succeeds, -1 if it fails.
ERRORS
The call succeeds unless:
[EINVAL] how is not SHUT_RD, SHUT_WR, or SHUT_RDWR.
[EBADF] s is not a valid descriptor.
[ENOTSOCK] s is a file, not a socket.
[ENOTCONN] The specified socket is not connected.
SEE ALSO
connect(2), socket(2)
HISTORY
The shutdown() function call appeared in 4.2BSD. The how arguments used
to be simply 0, 1, and 2, but now have named values as specified by .
BSD Experimental June 4, 1993 1
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