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

extern char **environ;

int main(void) {

    pid_t pid;
    
    char *args[] = {"/usr/bin/ls", "-l", NULL};
    

    // Similar to doing a fork then an execve
    // spawn "/bin/ls" as a separate process
    if (posix_spawn(&pid, args[0], NULL, NULL, args, environ) != 0) {
        perror("spawn");
        exit(1);
    }

    int status;
    // wait for spawned processes to finish
    if (wait(&status) == -1) {
        perror("waitpid");
        exit(1);
    }

    if(WIFEXITED(status)){
          printf("/bin/ls exited normally with status %d\n",WEXITSTATUS(status));
    }
    return 0;
}