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[unix-history] / usr / src / usr.bin / window / wwchild.c

/*
 * Copyright (c) 1983 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.
 *
 * %sccs.include.redist.c%
 */

#ifndef lint
static char sccsid[] = "@(#)wwchild.c	3.15 (Berkeley) %G%";
#endif /* not lint */

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

void
wwchild()
{
	extern errno;
	int olderrno;
	register struct ww **wp;
	union wait w;
	int pid;
	char collected = 0;

	olderrno = errno;
	while ((pid =
	    wait3((int *)&w, 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();
}