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libuv/src/win/process.c  view on Meta::CPAN

    uv_fatal_error(GetLastError(), "RegisterWaitForSingleObject");
  }

  CloseHandle(info.hThread);

  assert(!err);

  /* Make the handle active. It will remain active until the exit callback is
   * made or the handle is closed, whichever happens first. */
  uv__handle_start(process);

  /* Cleanup, whether we succeeded or failed. */
 done:
  uv__free(application);
  uv__free(application_path);
  uv__free(arguments);
  uv__free(cwd);
  uv__free(env);
  uv__free(alloc_path);

  if (process->child_stdio_buffer != NULL) {
    /* Clean up child stdio handles. */
    uv__stdio_destroy(process->child_stdio_buffer);
    process->child_stdio_buffer = NULL;
  }

  return uv_translate_sys_error(err);
}


static int uv__kill(HANDLE process_handle, int signum) {
  if (signum < 0 || signum >= NSIG) {
    return UV_EINVAL;
  }

  switch (signum) {
    case SIGTERM:
    case SIGKILL:
    case SIGINT: {
      /* Unconditionally terminate the process. On Windows, killed processes
       * normally return 1. */
      DWORD status;
      int err;

      if (TerminateProcess(process_handle, 1))
        return 0;

      /* If the process already exited before TerminateProcess was called,.
       * TerminateProcess will fail with ERROR_ACCESS_DENIED. */
      err = GetLastError();
      if (err == ERROR_ACCESS_DENIED &&
          GetExitCodeProcess(process_handle, &status) &&
          status != STILL_ACTIVE) {
        return UV_ESRCH;
      }

      return uv_translate_sys_error(err);
    }

    case 0: {
      /* Health check: is the process still alive? */
      DWORD status;

      if (!GetExitCodeProcess(process_handle, &status))
        return uv_translate_sys_error(GetLastError());

      if (status != STILL_ACTIVE)
        return UV_ESRCH;

      return 0;
    }

    default:
      /* Unsupported signal. */
      return UV_ENOSYS;
  }
}


int uv_process_kill(uv_process_t* process, int signum) {
  int err;

  if (process->process_handle == INVALID_HANDLE_VALUE) {
    return UV_EINVAL;
  }

  err = uv__kill(process->process_handle, signum);
  if (err) {
    return err;  /* err is already translated. */
  }

  process->exit_signal = signum;

  return 0;
}


int uv_kill(int pid, int signum) {
  int err;
  HANDLE process_handle;

  if (pid == 0) {
    process_handle = GetCurrentProcess();
  } else {
    process_handle = OpenProcess(PROCESS_TERMINATE | PROCESS_QUERY_INFORMATION,
                                 FALSE,
                                 pid);
  }

  if (process_handle == NULL) {
    err = GetLastError();
    if (err == ERROR_INVALID_PARAMETER) {
      return UV_ESRCH;
    } else {
      return uv_translate_sys_error(err);
    }
  }

  err = uv__kill(process_handle, signum);
  CloseHandle(process_handle);