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>SHUTDOWN(2) System Calls 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
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 dis-
allowed.
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
X/Open Portability Guide Issue 4 (``XPG4'').
BSD June 4, 1993 BSD
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