redhat man page for shutdown

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

NAME
       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 connection on the socket associated with s to be shut down.  If how is SHUT_RD, fur-
       ther receptions will be disallowed.  If how is SHUT_WR, further transmissions will be disallowed.  If how is SHUT_RDWR, further	receptions
       and transmissions 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.

NOTES
       The constants SHUT_RD, SHUT_WR, SHUT_RDWR have the value 0, 1, 2, respectively, and are defined in <sys/socket.h> since glibc-2.1.91.

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

SEE ALSO
       connect(2), socket(2)

BSD Man Page							    1993-07-24							       SHUTDOWN(2)