SHUTDOWN(2)                   System Calls Manual                  SHUTDOWN(2)

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.

BSD 4.2                         March 18, 2015                         BSD 4.2