1 /* ========================================================================

2 * Copyright 1988-2006 University of Washington

3 *

4 * Licensed under the Apache License, Version 2.0 (the "License");

5 * you may not use this file except in compliance with the License.

6 * You may obtain a copy of the License at

7 *

8 * http://www.apache.org/licenses/LICENSE-2.0

9 *

10 *

11 * ========================================================================

12 */

13

14 /*

15 * Program: UNIX Grim PID Reaper -- wait() version

16 *

17 * Author: Mark Crispin

18 * Networks and Distributed Computing

19 * Computing & Communications

20 * University of Washington

21 * Administration Building, AG-44

22 * Seattle, WA 98195

23 * Internet: MRC@CAC.Washington.EDU

24 *

25 * Date: 30 November 1993

26 * Last Edited: 30 August 2006

27 */

28 

29 /* Grim PID reaper

30 * Accepts: process ID

31 * kill request flag

32 * status return value

33 */

34

35 void grim_pid_reap_status (int pid,int killreq,void *status)

36 {

37 int r;

38 if (killreq) {

39 kill (pid,SIGHUP); /* kill if not already dead */

40 alarm (10); /* in case we get hosed */

41 while (((r = wait (NIL)) != pid) &&

42 ((r > 0) || ((errno != ECHILD) && (errno != EINTR))));

43 alarm (0); /* cancel the alarm */

44 }

45 else while (((r = wait (status)) != pid) && ((r > 0) || (errno != ECHILD)));

46 }