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