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#ifndef lint
static char SccsId[] = "%W% %G%";
#endif
/* Module: rtio.c (Real Time Input Output)
* Purpose: Read commands from a Berkeley Socket
* Subroutine: open_rtsock_connection() returns: void
* Subroutine: open_rtfifo_connection() returns: void
* Subroutine: sock_output() returns: int
* Copyright: 1989 Smithsonian Astrophysical Observatory
* You may do anything you like with this file except remove
* this copyright. The Smithsonian Astrophysical Observatory
* makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without
* express or implied warranty.
* Modified: {0] Initial version John Roll : May 90
* {n} <who> -- <does what> -- <when>
*/
#include <stdio.h> /* stderr, FILE, NULL, etc. */
#ifndef VMS
#ifdef SYSV
#include <string.h>
#else
#include <strings.h> /* strlen, etc. for unenlightened BSD's */
#endif
#else
#include <string.h>
#endif
#include <X11/Xlib.h> /* X window stuff */
#include "hfiles/control.h" /* define struct connectRec */
#include "hfiles/rtcmd.h" /* command protocol and ID's */
extern struct controlRec control;
/*
* Subroutine: open_rtsock_connection
* Purpose: open the connection for Sockets
*/
void open_rtsock_connection ()
{
int open_connection();
void read_rtio_packet();
control.aux_in.func = read_rtio_packet;
control.aux_in.type = IOP_socket;
if( open_connection(&control.aux_in) != -1 ) {
if( control.verbose )
(void)printf("Open to accept real time Socket io\n");
}
}
/*
* Subroutine: open_rtfifo_connection
* Purpose: open the connection for FiFo
*/
void open_rtfifo_connection ()
{
int open_connection();
void read_rtio_packet();
control.aux_in.func = read_rtio_packet;
control.aux_in.type = IOP_pipe;
if( open_connection(&control.aux_in) != -1 ) {
if( control.verbose )
(void)printf("Open to accept feal time FiFo io\n");
}
}
/*
* Subroutine: read_rtio_packet
* Purpose: read and decode a socket protical packet
* Called by:
* Returns: void
*/
void read_rtio_packet ( port )
struct connectRec *port;
{
int bytes;
cmdrec cmd;
bytes = read_connection(port, (char *)&cmd, sizeof(cmdrec));
if ( bytes != sizeof(cmdrec) )
if ( bytes == 0 )
close_connection(port);
else
flush_connection(port);
si_command(&cmd);
}
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