shutdown - shut down part of a full-duplex connection


SYNOPSIS

       #include <sys/socket.h>

       int shutdown(int s, int how);


DESCRIPTION

       The shutdown call causes all or part of a full-duplex con­
       nection on the socket associated with s to be  shut  down.
       If  how is 0, further receives will be disallowed.  If how
       is 1, further sends will be disallowed.  If how is 2, fur­
       ther sends and receives will be disallowed.


RETURN VALUE

       On  success,  zero is returned.  On error, -1 is returned,
       and errno is set appropriately.


ERRORS

       EBADF   s is not a valid descriptor.

       ENOTSOCK
               s is a file, not a socket.

       ENOTCONN
               The specified socket is not connected.


CONFORMING TO

       4.4BSD (the  shutdown  function  call  first  appeared  in
       4.2BSD).


BUGS

       The  numerical  how flags should be replaced by the Single
       Unix-mandated SHUT_RD, SHUT_WR, and SHUT_RDWR flags.


SEE ALSO

       connect(2), socket(2)