ipcrm.c revision 102944
1/* 2 * Copyright (c) 1994 Adam Glass 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Adam Glass. 16 * 4. The name of the Author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL Adam Glass BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__FBSDID("$FreeBSD: head/usr.bin/ipcrm/ipcrm.c 102944 2002-09-04 23:29:10Z dwmalone $"); 34 35#include <ctype.h> 36#include <err.h> 37#include <signal.h> 38#include <stdio.h> 39#include <stdlib.h> 40#include <unistd.h> 41#include <sys/types.h> 42#include <sys/ipc.h> 43#include <sys/msg.h> 44#include <sys/sem.h> 45#include <sys/shm.h> 46 47#define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem")) 48#define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \ 49 (x == 'M' ? "shared memory segment" : "semaphore")) 50 51int signaled; 52 53void usage(void); 54int msgrm(key_t, int); 55int shmrm(key_t, int); 56int semrm(key_t, int); 57void not_configured(int); 58 59void usage(void) 60{ 61 fprintf(stderr, "%s\n%s\n", 62 "usage: ipcrm [-q msqid] [-m shmid] [-s semid]", 63 " [-Q msgkey] [-M shmkey] [-S semkey] ..."); 64 exit(1); 65} 66 67int msgrm(key_t key, int id) 68{ 69 if (key) { 70 id = msgget(key, 0); 71 if (id == -1) 72 return -1; 73 } 74 return msgctl(id, IPC_RMID, NULL); 75} 76 77int shmrm(key_t key, int id) 78{ 79 if (key) { 80 id = shmget(key, 0, 0); 81 if (id == -1) 82 return -1; 83 } 84 return shmctl(id, IPC_RMID, NULL); 85} 86 87int semrm(key_t key, int id) 88{ 89 union semun arg; 90 91 if (key) { 92 id = semget(key, 0, 0); 93 if (id == -1) 94 return -1; 95 } 96 return semctl(id, 0, IPC_RMID, arg); 97} 98 99void not_configured(int signo __unused) 100{ 101 signaled++; 102} 103 104int main(int argc, char *argv[]) 105{ 106 int c, result, errflg, target_id; 107 key_t target_key; 108 109 errflg = 0; 110 signal(SIGSYS, not_configured); 111 while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) { 112 113 signaled = 0; 114 switch (c) { 115 case 'q': 116 case 'm': 117 case 's': 118 target_id = atoi(optarg); 119 if (c == 'q') 120 result = msgrm(0, target_id); 121 else if (c == 'm') 122 result = shmrm(0, target_id); 123 else 124 result = semrm(0, target_id); 125 if (result < 0) { 126 errflg++; 127 if (!signaled) 128 warn("%sid(%d): ", IPC_TO_STR(toupper(c)), target_id); 129 else 130 warnx("%ss are not configured in the running kernel", 131 IPC_TO_STRING(toupper(c))); 132 } 133 break; 134 case 'Q': 135 case 'M': 136 case 'S': 137 target_key = atol(optarg); 138 if (target_key == IPC_PRIVATE) { 139 warnx("can't remove private %ss", IPC_TO_STRING(c)); 140 continue; 141 } 142 if (c == 'Q') 143 result = msgrm(target_key, 0); 144 else if (c == 'M') 145 result = shmrm(target_key, 0); 146 else 147 result = semrm(target_key, 0); 148 if (result < 0) { 149 errflg++; 150 if (!signaled) 151 warn("%ss(%ld): ", IPC_TO_STR(c), target_key); 152 else 153 warnx("%ss are not configured in the running kernel", 154 IPC_TO_STRING(c)); 155 } 156 break; 157 case ':': 158 fprintf(stderr, "option -%c requires an argument\n", optopt); 159 usage(); 160 case '?': 161 fprintf(stderr, "unrecognized option: -%c\n", optopt); 162 usage(); 163 } 164 } 165 166 if (optind != argc) { 167 fprintf(stderr, "unknown argument: %s\n", argv[optind]); 168 usage(); 169 } 170 exit(errflg); 171} 172 173