#include <errno.h>
#include <spawn.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


int main()
{

        char* _args[4];
        char* _env[] = { "myenv=5", NULL };

        _args[0] = "bash";
        _args[1] = "-c";
        _args[2] = "exit $myenv";
        _args[3] = NULL;

        pid_t pid;
        int err = posix_spawnp(&pid, _args[0], NULL, NULL, _args, _env);
        printf("posix_spawnp: %d, %d\n", err, pid);

        int status;
        pid_t waitpid_res = waitpid(pid, &status, 0);
        if (waitpid_res != pid)
                printf("posix_spawnp: waitpid didn't return pid\n");

        printf("posix_spawnp: WIFEXITED(): %d, WEXITSTATUS() %d => 5\n",
                WIFEXITED(status), WEXITSTATUS(status));

        _args[0] = "/tmp/toto";
        _args[1] = NULL;

        err = posix_spawn(&pid, _args[0], NULL, NULL, _args, _env);
        printf("posix_spawn: %d, %d\n", err, pid);

        if (err == 0) {
                waitpid_res = waitpid(pid, &status, 0);
                if (waitpid_res != pid)
                        printf("posix_spawn: waitpid didn't return pid\n");
                printf("posix_spawn: WIFEXITED(): %d, WEXITSTATUS() %d => 127\n",
                        WIFEXITED(status), WEXITSTATUS(status));
        } else {
                waitpid_res = waitpid(-1, NULL, 0);
                printf("posix_spawn: waitpid %d, %d\n", waitpid_res, errno);
        }

        return 0;
}