/**
 * File: separate.c
 * ----------------
 * Here's is a program that's written in a style more conistent with
 * how fork is normally used.
 */

#include <unistd.h>
#include <stdio.h>
#include <sys/wait.h>
#include "exit-utils.h"

static const int kForkFailed = 1;
static const int kWaitFailed = 2;

int main(int argc, char *argv[]) {
    pid_t pid = fork();
    exitIf(pid == -1, kForkFailed, stderr, "Fork function failed.\n");
    if (pid == 0) {
        printf("I'm the child, and the parent will wait up for me.\n");
        return 110; // contrived exit status (not a bad number, though)
    } else {
        int status;
        int result = waitpid(pid, &status, 0);
        exitIf(result != pid, kWaitFailed,
                   stderr, "Parent's wait for child process with pid %d failed.\n", pid);
        if (WIFEXITED(status)) {
            printf("Child exited with status %d.\n", WEXITSTATUS(status));
        } else {
            printf("Child terminated abnormally.\n");
        }
        return 0;
    }
}