#include <stdlib.h>
#include <stdio.h>
#include <string.h>

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

extern char **environ;

int main()
{
    pid_t pid;
    char *argv[] = {"sh", "-c", "echo hi", NULL};
    posix_spawnattr_t attr;
    int status;
    short flags = POSIX_SPAWN_RESETIDS;

    if ((status = posix_spawnattr_init(&attr)) != 0) {
        printf("posix_spawnattr_init: %s\n", strerror(status));
	return status;
    }
    if ((status = posix_spawnattr_setflags(&attr, flags)) != 0) {
        printf("posix_spawnattr_setflags: %s\n", strerror(status));
	return status;
    }

    status = posix_spawn(&pid, "/bin/sh", NULL, &attr, argv, environ);
    if (status == 0) {
        printf("Child pid: %i\n", pid);
        do {
          if (waitpid(pid, &status, 0) != -1) {
            printf("Child status %d\n", WEXITSTATUS(status));
          } else {
            perror("waitpid");
            return 1;
          }
        } while (!WIFEXITED(status) && !WIFSIGNALED(status));
    } else {
        printf("posix_spawn: %s\n", strerror(status));
    }
    return status;
}