117 lines
3.5 KiB
C
117 lines
3.5 KiB
C
/*-
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* Copyright (c) 1992, 1993, 1995 Eugene W. Stark
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Eugene W. Stark.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY EUGENE W. STARK (THE AUTHOR) ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$FreeBSD$";
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#endif /* not lint */
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/param.h>
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#include <sys/stat.h>
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#include "xtend.h"
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#include "xten.h"
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#include "paths.h"
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void printstatus __P((FILE *, STATUS *));
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/*
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* Initialize the status table from the status files
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*/
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void
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initstatus()
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{
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if(lseek(status, 0, SEEK_SET) != 0) {
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fprintf(Log, "%s: Seek error on status file\n", thedate());
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return;
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}
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if(read(status, Status, 16*16*sizeof(STATUS)) != 16*16*sizeof(STATUS)) {
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fprintf(Log, "%s: Read error on status file\n", thedate());
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return;
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}
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}
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/*
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* Checkpoint status of any devices whose status has changed
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* and notify anyone monitoring those devices.
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*/
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void
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checkpoint_status()
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{
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int h, i, k, offset;
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offset = 0;
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for(h = 0; h < 16; h++) {
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for(i = 0; i < 16; i++) {
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if(Status[h][i].changed) {
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if(lseek(status, offset, SEEK_SET) != offset) {
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fprintf(Log, "%s: Seek error on status file\n", thedate());
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} else {
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if(write(status, &Status[h][i], sizeof(STATUS)) != sizeof(STATUS)) {
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fprintf(Log, "%s: Write error on status file\n", thedate());
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}
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}
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Status[h][i].changed = 0;
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for(k = 0; k < MAXMON; k++) {
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if(Monitor[k].inuse
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&& Monitor[k].house == h && Monitor[k].unit == i) {
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/*
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* Arrange to catch SIGPIPE in case client has gone away.
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*/
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extern int client;
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extern void clientgone();
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void (*prev)();
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client = k;
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prev = signal(SIGPIPE, clientgone);
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printstatus(Monitor[k].user, &Status[h][i]);
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fflush(Monitor[k].user);
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signal(SIGPIPE, prev);
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}
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}
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}
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offset += sizeof(STATUS);
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}
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}
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}
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int client;
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void clientgone()
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{
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fprintf(Log, "%s: Deleting monitor table entry %d, client gone\n", thedate(), client);
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fclose(Monitor[client].user);
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Monitor[client].inuse = 0;
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}
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