/************************************************************************
*                                                                       *    
*  Copyright Digital Equipment Corporation 1998. All rights reserved.   *
*                                                                       *    
*  Restricted Rights: Use, duplication, or disclosure by the U.S.       *    
*  Government is subject to restrictions as set forth in subparagraph   *    
*  (c) (1) (ii) of DFARS 252.227-7013, or in FAR 52.227-19, or in FAR   *    
*  52.227-14 Alt. III, as applicable.                                   *    
*                                                                       *    
*  This software is proprietary to and embodies the confidential        *    
*  technology of Digital Equipment Corporation. Possession, use, or     *    
*  copying of this software and media is authorized only pursuant to a  *    
*  valid written license from Digital or an authorized sublicensor.     *    
*                                                                       *    
************************************************************************/

/*      chap_5_check_stat.c     */

/* In this example 5 child processes are started.  The wait()   */
/* function is placed in a separate for loop so that it is      */
/* called once for each child.  If wait() were called within    */
/* the first for loop, the parent  would wait for one child to  */
/* terminate before executing the next child.  If there were    */
/* only one wait request, any child still running when the      */
/* parent exits would terminate prematurely.                    */

#include <climsgdef.h>
#include <stdio.h>
#include <stdlib.h>
#include <perror.h>
#include <processes.h>

const char *child_name = "chap_5_check_stat_child.exe" ;

main()
{
    int status,
        cstatus,
        i;

    for (i = 0; i < 5; i++) {
        if ((status = vfork()) == 0) {
            printf("Parent - Starting Child %d\n", i);
            if ((status = execl(child_name, 0)) == -1) {
                perror("Parent - Exec failed");
                exit(EXIT_FAILURE);
            }
        }
        else if (status < -1)
            printf("Parent - Child process failed\n");
    }

    printf("Parent - Waiting for children\n");

    for (i = 0; i < 5; i++) {
        if ((status = wait(&cstatus)) == -1)
            perror("Parent - Wait failed");
        else if (cstatus == CLI$_IMAGEFNF)
            printf("Parent - Child does not exist\n");
        else
            printf("Parent - Child %X final status: %d\n",
                   status, cstatus);
    }
}