#include <sys/types.h>

#include <sys/wait.h>

#include "error.h"

#include "haswaitp.h"

#ifdef HASWAITPID

int wait_pid(wstat,pid) int *wstat; int pid;

{

  int r;

  do

    r = waitpid(pid,wstat,0);

  while ((r == -1) && (errno == error_intr));

  return r;

}

#else

/* XXX untested */

/* XXX breaks down with more than two children */

static int oldpid = 0;

static int oldwstat; /* defined if(oldpid) */

int wait_pid(wstat,pid) int *wstat; int pid;

{

  int r;

  if (pid == oldpid) { *wstat = oldwstat; oldpid = 0; return pid; }

  do {

    r = wait(wstat);

    if ((r != pid) && (r != -1)) { oldwstat = *wstat; oldpid = r; continue; }

  }

  while ((r == -1) && (errno == error_intr));

  return r;

}

#endif