1 /* $OpenBSD: ipcrm.c,v 1.13 2023/03/08 04:43:11 guenther Exp $*/ 2 3 /* 4 * Copyright (c) 1994 Adam Glass 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Adam Glass. 18 * 4. The name of the Author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL Adam Glass BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 */ 34 35 #include <sys/types.h> 36 #include <sys/ipc.h> 37 #include <sys/msg.h> 38 #include <sys/sem.h> 39 #include <sys/shm.h> 40 #include <stdio.h> 41 #include <unistd.h> 42 #include <limits.h> 43 #include <stdlib.h> 44 #include <ctype.h> 45 #include <err.h> 46 #include <signal.h> 47 48 #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem")) 49 #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \ 50 (x == 'M' ? "shared memory segment" : "semaphore")) 51 52 int signaled; 53 54 void usage(void); 55 int msgrm(key_t, int); 56 int shmrm(key_t, int); 57 int semrm(key_t, int); 58 void not_configured(int); 59 60 void 61 usage(void) 62 { 63 extern char *__progname; 64 fprintf(stderr, "usage: %s [-M shmkey] [-m shmid] [-Q msgkey]\n" 65 " [-q msqid] [-S semkey] [-s semid] ...\n", 66 __progname); 67 exit(1); 68 } 69 70 int 71 msgrm(key_t key, int id) 72 { 73 if (key) { 74 id = msgget(key, 0); 75 if (id == -1) 76 return (-1); 77 } 78 return (msgctl(id, IPC_RMID, NULL)); 79 } 80 81 int 82 shmrm(key_t key, int id) 83 { 84 if (key) { 85 id = shmget(key, 0, 0); 86 if (id == -1) 87 return (-1); 88 } 89 return (shmctl(id, IPC_RMID, NULL)); 90 } 91 92 int 93 semrm(key_t key, int id) 94 { 95 union semun arg; 96 97 if (key) { 98 id = semget(key, 0, 0); 99 if (id == -1) 100 return (-1); 101 } 102 return (semctl(id, 0, IPC_RMID, arg)); 103 } 104 105 void 106 not_configured(int signo) 107 { 108 signaled++; 109 } 110 111 int 112 main(int argc, char *argv[]) 113 { 114 int c, result, errflg, target_id; 115 const char *errstr; 116 key_t target_key; 117 118 errflg = 0; 119 signal(SIGSYS, not_configured); 120 while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) { 121 signaled = 0; 122 switch (c) { 123 case 'q': 124 case 'm': 125 case 's': 126 target_id = strtonum(optarg, 0, INT_MAX, &errstr); 127 if (errstr) 128 errx(1, "-%c %s: %s\n", c, optarg, errstr); 129 if (c == 'q') 130 result = msgrm(0, target_id); 131 else if (c == 'm') 132 result = shmrm(0, target_id); 133 else 134 result = semrm(0, target_id); 135 if (result < 0) { 136 errflg++; 137 if (!signaled) 138 warn("%sid(%d)", 139 IPC_TO_STR(toupper(c)), target_id); 140 else 141 warnx("%ss are not configured in the running kernel", 142 IPC_TO_STRING(toupper(c))); 143 } 144 break; 145 case 'Q': 146 case 'M': 147 case 'S': 148 target_key = atol(optarg); 149 if (target_key == IPC_PRIVATE) { 150 warnx("can't remove private %ss", IPC_TO_STRING(c)); 151 continue; 152 } 153 if (c == 'Q') 154 result = msgrm(target_key, 0); 155 else if (c == 'M') 156 result = shmrm(target_key, 0); 157 else 158 result = semrm(target_key, 0); 159 if (result < 0) { 160 errflg++; 161 if (!signaled) 162 warn("%skey(%ld)", IPC_TO_STR(c), 163 target_key); 164 else 165 warnx("%ss are not configured in the running kernel", 166 IPC_TO_STRING(c)); 167 } 168 break; 169 case ':': 170 warnx("option -%c requires an argument", optopt); 171 usage(); 172 default: 173 warnx("unrecognized option: -%c", optopt); 174 usage(); 175 } 176 } 177 178 if (optind != argc) { 179 warnx("unknown argument: %s", argv[optind]); 180 usage(); 181 } 182 exit(errflg); 183 } 184