waitpid.c   [plain text]

/* waitpid.c --- waiting for process termination, under OS/2
   Karl Fogel <kfogel@cyclic.com> --- November 1995  */

#include <assert.h>
#include <stdio.h>
#include <process.h>
#include <errno.h>

#include "config.h"

/* Wait for the process PID to exit.  Put the return status in *statusp.
   OPTIONS is not supported yet under OS/2.  We hope it's always zero.  */
pid_t waitpid (pid, statusp, options)
     pid_t pid;
     int *statusp;
     int options;
{
  pid_t rc;

  /* We don't know how to deal with any options yet.  */
  assert (options == 0);
  
  rc = _cwait (statusp, pid, WAIT_CHILD);
  
  if (rc == -1)
    {
      if (errno == ECHILD)
        return pid;
      else
        return -1;
    }
  else if (rc == pid)
    return pid;
  else
    return -1;
}