NetBSD-5.0.2/usr.bin/window/wwchild.c

/*	$NetBSD: wwchild.c,v 1.8 2006/12/18 20:04:55 christos Exp $	*/

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)wwchild.c	8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: wwchild.c,v 1.8 2006/12/18 20:04:55 christos Exp $");
#endif
#endif /* not lint */

#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include "ww.h"

void
wwchild(int dummy __unused)
{
	int olderrno;
	struct ww **wp;
	int status;
	int pid;
	char collected = 0;

	olderrno = errno;
	while ((pid =
	    wait3(&status, WNOHANG|WUNTRACED, (struct rusage *)0)) > 0) {
		for (wp = wwindex; wp < &wwindex[NWW]; wp++) {
			if (*wp && (*wp)->ww_state == WWS_HASPROC
			    && (*wp)->ww_pid == pid) {
				(*wp)->ww_state = WWS_DEAD;
				collected = 1;
				break;
			}
		}
	}
	errno = olderrno;
	/* jump out of wwiomux when somebody dies */
	if (collected)
		wwsetintr();
}