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      1     0  stevel /*
      2     0  stevel  * CDDL HEADER START
      3     0  stevel  *
      4     0  stevel  * The contents of this file are subject to the terms of the
      5  3125  jacobs  * Common Development and Distribution License (the "License").
      6  3125  jacobs  * You may not use this file except in compliance with the License.
      7     0  stevel  *
      8     0  stevel  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9     0  stevel  * or http://www.opensolaris.org/os/licensing.
     10     0  stevel  * See the License for the specific language governing permissions
     11     0  stevel  * and limitations under the License.
     12     0  stevel  *
     13     0  stevel  * When distributing Covered Code, include this CDDL HEADER in each
     14     0  stevel  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15     0  stevel  * If applicable, add the following below this CDDL HEADER, with the
     16     0  stevel  * fields enclosed by brackets "[]" replaced with your own identifying
     17     0  stevel  * information: Portions Copyright [yyyy] [name of copyright owner]
     18     0  stevel  *
     19     0  stevel  * CDDL HEADER END
     20     0  stevel  */
     21  3125  jacobs 
     22  3125  jacobs /*
     23  3125  jacobs  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
     24  3125  jacobs  * Use is subject to license terms.
     25  3125  jacobs  */
     26  3125  jacobs 
     27     0  stevel /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     28     0  stevel /*	  All Rights Reserved  	*/
     29     0  stevel 
     30     0  stevel 
     31     0  stevel #pragma ident	"%Z%%M%	%I%	%E% SMI"
     32     0  stevel 
     33     0  stevel #include "lpsched.h"
     34     0  stevel 
     35     0  stevel /*
     36     0  stevel  * terminate() - STOP A CHILD PROCESS
     37     0  stevel  *
     38     0  stevel  * Note:  If you're trying to debug lpsched, and worried about
     39     0  stevel  *        seeing lots of calls to terminate() in the debug output,
     40     0  stevel  *        don't be; it gets called once for each entry in the child
     41     0  stevel  *        process table, whether or not there's such a child.
     42     0  stevel  */
     43     0  stevel 
     44     0  stevel void
     45     0  stevel terminate(register EXEC *ep)
     46     0  stevel {
     47     0  stevel 	int retries;		/* fix for sunsoft bugid 1108465	*/
     48     0  stevel 
     49     0  stevel 	if (ep->pid <= 0)
     50     0  stevel 		return;
     51     0  stevel 
     52     0  stevel 	if (ep->flags & EXF_KILLED)
     53     0  stevel 		return;
     54     0  stevel 	ep->flags |= EXF_KILLED;
     55     0  stevel 
     56     0  stevel 	/*
     57     0  stevel 	 * Theoretically, the following "if-then" is not needed,
     58     0  stevel 	 * but there's some bug in the code that occasionally
     59     0  stevel 	 * prevents us from hearing from a finished child.
     60     0  stevel 	 * (Kill -9 on the child would do that, of course, but
     61     0  stevel 	 * the problem has occurred in other cases.)
     62     0  stevel 	 */
     63     0  stevel 	if (kill(-ep->pid, SIGTERM) == -1 && errno == ESRCH) {
     64     0  stevel 		ep->pid = -99;
     65     0  stevel 		ep->status = SIGTERM;
     66     0  stevel 		ep->Errno = 0;
     67     0  stevel 		DoneChildren++;
     68     0  stevel 		return;
     69     0  stevel 	}
     70     0  stevel 
     71     0  stevel 	/*
     72     0  stevel 	 * Start fix for sunsoft bugid 1108465
     73     0  stevel 	 * the original code here was extremely optimistic, and
     74     0  stevel 	 * under certain circumstances, the pid's would still be
     75     0  stevel 	 * left around. here we get really serious about killing
     76     0  stevel 	 * the sucker.
     77     0  stevel 	 * we patiently wait for the pid to die. if it doesn't
     78     0  stevel 	 * do so in a reasonable amount of time, we get more forceful.
     79     0  stevel 	 * note that the original "ep->pid == -99" is a crude hack;
     80     0  stevel 	 * but that the convention is being followed. sigh.
     81     0  stevel 	 */
     82     0  stevel 	for (retries = 5; retries > 0; retries--) {
     83     0  stevel 		/* see if the process is still there		*/
     84     0  stevel 		if ((kill(-ep->pid, 0) == -1) && (errno == ESRCH)) {
     85     0  stevel 			ep->pid = -99;
     86     0  stevel 			ep->status = SIGTERM;
     87     0  stevel 			ep->Errno = 0;
     88     0  stevel 			DoneChildren++;
     89     0  stevel 			return;
     90     0  stevel 		} else if (errno == EINTR)
     91     0  stevel 			break;
     92     0  stevel 
     93     0  stevel 		sleep(2);
     94     0  stevel 	}
     95     0  stevel 
     96     0  stevel 	/* if it's still not dead, then get more forceful	*/
     97     0  stevel 	for (retries = 5; retries > 0; retries--) {
     98     0  stevel 		if ((kill(-ep->pid, SIGKILL) == -1) && (errno == ESRCH)) {
     99     0  stevel 			ep->pid = -99;
    100     0  stevel 			ep->status = SIGTERM;
    101     0  stevel 			ep->Errno = 0;
    102     0  stevel 			DoneChildren++;
    103     0  stevel 			return;
    104     0  stevel 		}
    105     0  stevel 		sleep(3);
    106     0  stevel 	}
    107     0  stevel 	/* end of sunsoft bugfix 1108465	*/
    108     0  stevel 	/*
    109     0  stevel 	 * well hardkill didn't work so just flag this request as done
    110     0  stevel 	 */
    111     0  stevel 	ep->pid = -99;
    112     0  stevel 	ep->status = SIGTERM;
    113     0  stevel 	ep->Errno = 0;
    114     0  stevel 	DoneChildren++;
    115     0  stevel }
    116