/* $OpenBSD: ipcrm.c,v 1.13 2023/03/08 04:43:11 guenther Exp $*/ /* * Copyright (c) 1994 Adam Glass * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Adam Glass. * 4. The name of the Author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY Adam Glass ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL Adam Glass BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include #include #include #include #include #include #include #include #include #include #include #include #define IPC_TO_STR(x) (x == 'Q' ? "msq" : (x == 'M' ? "shm" : "sem")) #define IPC_TO_STRING(x) (x == 'Q' ? "message queue" : \ (x == 'M' ? "shared memory segment" : "semaphore")) int signaled; void usage(void); int msgrm(key_t, int); int shmrm(key_t, int); int semrm(key_t, int); void not_configured(int); void usage(void) { extern char *__progname; fprintf(stderr, "usage: %s [-M shmkey] [-m shmid] [-Q msgkey]\n" " [-q msqid] [-S semkey] [-s semid] ...\n", __progname); exit(1); } int msgrm(key_t key, int id) { if (key) { id = msgget(key, 0); if (id == -1) return (-1); } return (msgctl(id, IPC_RMID, NULL)); } int shmrm(key_t key, int id) { if (key) { id = shmget(key, 0, 0); if (id == -1) return (-1); } return (shmctl(id, IPC_RMID, NULL)); } int semrm(key_t key, int id) { union semun arg; if (key) { id = semget(key, 0, 0); if (id == -1) return (-1); } return (semctl(id, 0, IPC_RMID, arg)); } void not_configured(int signo) { signaled++; } int main(int argc, char *argv[]) { int c, result, errflg, target_id; const char *errstr; key_t target_key; errflg = 0; signal(SIGSYS, not_configured); while ((c = getopt(argc, argv, ":q:m:s:Q:M:S:")) != -1) { signaled = 0; switch (c) { case 'q': case 'm': case 's': target_id = strtonum(optarg, 0, INT_MAX, &errstr); if (errstr) errx(1, "-%c %s: %s\n", c, optarg, errstr); if (c == 'q') result = msgrm(0, target_id); else if (c == 'm') result = shmrm(0, target_id); else result = semrm(0, target_id); if (result < 0) { errflg++; if (!signaled) warn("%sid(%d)", IPC_TO_STR(toupper(c)), target_id); else warnx("%ss are not configured in the running kernel", IPC_TO_STRING(toupper(c))); } break; case 'Q': case 'M': case 'S': target_key = atol(optarg); if (target_key == IPC_PRIVATE) { warnx("can't remove private %ss", IPC_TO_STRING(c)); continue; } if (c == 'Q') result = msgrm(target_key, 0); else if (c == 'M') result = shmrm(target_key, 0); else result = semrm(target_key, 0); if (result < 0) { errflg++; if (!signaled) warn("%skey(%ld)", IPC_TO_STR(c), target_key); else warnx("%ss are not configured in the running kernel", IPC_TO_STRING(c)); } break; case ':': warnx("option -%c requires an argument", optopt); usage(); default: warnx("unrecognized option: -%c", optopt); usage(); } } if (optind != argc) { warnx("unknown argument: %s", argv[optind]); usage(); } exit(errflg); }