usr/share/man/cat2/shutdown.0

SHUTDOWN(2)                 BSD Programmer's Manual                SHUTDOWN(2)

N\bNA\bAM\bME\bE
     s\bsh\bhu\but\btd\bdo\bow\bwn\bn - shut down part of a full-duplex connection

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
     #\b#i\bin\bnc\bcl\blu\bud\bde\be <\b<s\bsy\bys\bs/\b/s\bso\boc\bck\bke\bet\bt.\b.h\bh>\b>

     _\bi_\bn_\bt
     s\bsh\bhu\but\btd\bdo\bow\bwn\bn(_\bi_\bn_\bt _\bs, _\bi_\bn_\bt _\bh_\bo_\bw);

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     The s\bsh\bhu\but\btd\bdo\bow\bwn\bn() call causes all or part of a full-duplex connection on the
     socket associated with _\bs to be shut down.  If _\bh_\bo_\bw is 0, further receives
     will be disallowed.  If _\bh_\bo_\bw is 1, further sends will be disallowed.  If
     _\bh_\bo_\bw is 2, further sends and receives will be disallowed.

D\bDI\bIA\bAG\bGN\bNO\bOS\bST\bTI\bIC\bCS\bS
     A 0 is returned if the call succeeds, -1 if it fails.

E\bER\bRR\bRO\bOR\bRS\bS
     The call succeeds unless:

     [EBADF]     _\bS is not a valid descriptor.

     [ENOTSOCK]  _\bS is a file, not a socket.

     [ENOTCONN]  The specified socket is not connected.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     connect(2),  socket(2)

H\bHI\bIS\bST\bTO\bOR\bRY\bY
     The s\bsh\bhu\but\btd\bdo\bow\bwn\bn function call appeared in 4.2BSD.

4.2 Berkeley Distribution        June 4, 1993                                1