usr/src/ucb/window/wwchild.c

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#ifndef lint
static char sccsid[] = "@(#)wwchild.c   3.9 (Berkeley) 6/29/88";
#endif /* not lint */

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

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

        olderrno = errno;
        while ((pid = wait3(&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();
}