terminate.c revision 0a44ef6d9afbfe052a7e975f55ea0d2954b62a82
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#pragma ident "%Z%%M% %I% %E% SMI"
#include "lpsched.h"
/*
* terminate() - STOP A CHILD PROCESS
*
* Note: If you're trying to debug lpsched, and worried about
* seeing lots of calls to terminate() in the debug output,
* don't be; it gets called once for each entry in the child
* process table, whether or not there's such a child.
*/
void
terminate(register EXEC *ep)
{
int retries; /* fix for sunsoft bugid 1108465 */
if (ep->pid <= 0)
return;
if (ep->flags & EXF_KILLED)
return;
ep->flags |= EXF_KILLED;
/*
* Theoretically, the following "if-then" is not needed,
* but there's some bug in the code that occasionally
* prevents us from hearing from a finished child.
* (Kill -9 on the child would do that, of course, but
* the problem has occurred in other cases.)
*/
if (kill(-ep->pid, SIGTERM) == -1 && errno == ESRCH) {
ep->pid = -99;
ep->status = SIGTERM;
ep->Errno = 0;
DoneChildren++;
return;
}
/*
* Start fix for sunsoft bugid 1108465
* the original code here was extremely optimistic, and
* under certain circumstances, the pid's would still be
* left around. here we get really serious about killing
* the sucker.
* we patiently wait for the pid to die. if it doesn't
* do so in a reasonable amount of time, we get more forceful.
* note that the original "ep->pid == -99" is a crude hack;
* but that the convention is being followed. sigh.
*/
for (retries = 5; retries > 0; retries--) {
/* see if the process is still there */
if ((kill(-ep->pid, 0) == -1) && (errno == ESRCH)) {
ep->pid = -99;
ep->status = SIGTERM;
ep->Errno = 0;
DoneChildren++;
return;
} else if (errno == EINTR)
break;
sleep(2);
}
/* if it's still not dead, then get more forceful */
for (retries = 5; retries > 0; retries--) {
if ((kill(-ep->pid, SIGKILL) == -1) && (errno == ESRCH)) {
ep->pid = -99;
ep->status = SIGTERM;
ep->Errno = 0;
DoneChildren++;
return;
}
sleep(3);
}
/* end of sunsoft bugfix 1108465 */
/*
* well hardkill didn't work so just flag this request as done
*/
ep->pid = -99;
ep->status = SIGTERM;
ep->Errno = 0;
DoneChildren++;
}