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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright 2000-2003 Sun Microsystems, Inc. All rights reserved. 28 * Use is subject to license terms. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 #include "lpsched.h" 34 35 /* 36 * terminate() - STOP A CHILD PROCESS 37 * 38 * Note: If you're trying to debug lpsched, and worried about 39 * seeing lots of calls to terminate() in the debug output, 40 * don't be; it gets called once for each entry in the child 41 * process table, whether or not there's such a child. 42 */ 43 44 void 45 terminate(register EXEC *ep) 46 { 47 int retries; /* fix for sunsoft bugid 1108465 */ 48 49 if (ep->pid <= 0) 50 return; 51 52 #if defined(DEBUG) 53 if (debug & DB_EXEC) 54 execlog("KILL: pid %d%s%s\n", ep->pid, 55 ((ep->flags & EXF_KILLED)? ", second time" : ""), 56 (kill(ep->pid, 0) == -1? ", but child is GONE!" : "")); 57 #endif 58 59 if (ep->flags & EXF_KILLED) 60 return; 61 ep->flags |= EXF_KILLED; 62 63 /* 64 * Theoretically, the following "if-then" is not needed, 65 * but there's some bug in the code that occasionally 66 * prevents us from hearing from a finished child. 67 * (Kill -9 on the child would do that, of course, but 68 * the problem has occurred in other cases.) 69 */ 70 if (kill(-ep->pid, SIGTERM) == -1 && errno == ESRCH) { 71 ep->pid = -99; 72 ep->status = SIGTERM; 73 ep->Errno = 0; 74 DoneChildren++; 75 return; 76 } 77 78 /* 79 * Start fix for sunsoft bugid 1108465 80 * the original code here was extremely optimistic, and 81 * under certain circumstances, the pid's would still be 82 * left around. here we get really serious about killing 83 * the sucker. 84 * we patiently wait for the pid to die. if it doesn't 85 * do so in a reasonable amount of time, we get more forceful. 86 * note that the original "ep->pid == -99" is a crude hack; 87 * but that the convention is being followed. sigh. 88 */ 89 for (retries = 5; retries > 0; retries--) { 90 /* see if the process is still there */ 91 if ((kill(-ep->pid, 0) == -1) && (errno == ESRCH)) { 92 ep->pid = -99; 93 ep->status = SIGTERM; 94 ep->Errno = 0; 95 DoneChildren++; 96 return; 97 } else if (errno == EINTR) 98 break; 99 100 sleep(2); 101 } 102 103 /* if it's still not dead, then get more forceful */ 104 for (retries = 5; retries > 0; retries--) { 105 if ((kill(-ep->pid, SIGKILL) == -1) && (errno == ESRCH)) { 106 ep->pid = -99; 107 ep->status = SIGTERM; 108 ep->Errno = 0; 109 DoneChildren++; 110 return; 111 } 112 sleep(3); 113 } 114 /* end of sunsoft bugfix 1108465 */ 115 /* 116 * well hardkill didn't work so just flag this request as done 117 */ 118 ep->pid = -99; 119 ep->status = SIGTERM; 120 ep->Errno = 0; 121 DoneChildren++; 122 } 123