#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/wait.h>


int main(int argc, char **argv) {
    for (int i = 0; i < 10; i++) {
        if (fork() == 0)
            //i'th child
            exit(i);
    }

    for (int i = 0; i < 10; i++) {
        int status;
        pid_t childexited = wait(&status);
        if (childexited == -1) {
            perror("wait");
            continue;
        }
                
        if (WIFEXITED(status)) {
            printf("child exited pid %d exit status %d\n", childexited, WEXITSTATUS(status));
        } else if (WIFSIGNALED(status)) {
            printf("child crashed/was killed pid %d, signal %d\n", childexited, WTERMSIG(status));
        } else {
            printf("something else\n");
        }
    }
}