/* ISC license. */

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

pid_t child_spawn0 (char const *prog, char const *const *argv, char const *const *envp)
{
  pid_t pid ;
  posix_spawnattr_t attr ;
  int e ;
  e = posix_spawnattr_init(&attr) ;
  if (e) goto err ;
  e = posix_spawnp(&pid, prog, 0, &attr, (char *const *)argv, (char *const *)envp) ;
  posix_spawnattr_destroy(&attr) ;
  if (e) goto err ;
  return pid ;

 err:
  errno = e ;
  return 0 ;
}

int main (int argc, char const *const *argv, char const *const *envp)
{
  if (argc < 2) return 1 ;
  printf ("%d\n", child_spawn0(argv[1], &argv[1], envp)) ;
  return 0 ;
}