1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
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/cdefs.h>
36 #include <sys/param.h>
37 #define _WANT_SYSVMSG_INTERNALS
38 #include <sys/msg.h>
39 #define _WANT_SYSVSEM_INTERNALS
40 #define _WANT_SEMUN
41 #include <sys/sem.h>
42 #define _WANT_SYSVSHM_INTERNALS
43 #include <sys/shm.h>
44
45 #include <ctype.h>
46 #include <err.h>
47 #include <grp.h>
48 #include <kvm.h>
49 #include <stdio.h>
50 #include <stdlib.h>
51 #include <unistd.h>
52
53 #include "ipc.h"
54
55 static int signaled;
56 static int errflg;
57 static int rmverbose = 0;
58
59 static void
usage(void)60 usage(void)
61 {
62
63 fprintf(stderr,
64 "usage: ipcrm [-W] [-v[v]]\n"
65 " [-q msqid] [-m shmid] [-s semid]\n"
66 " [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
67 exit(1);
68 }
69
70 static int
msgrm(key_t key,int id)71 msgrm(key_t key, int id)
72 {
73
74 if (key == -1 || id == -1) {
75 struct msqid_kernel *kxmsqids;
76 size_t kxmsqids_len;
77 int num;
78
79 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
80 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
81 kxmsqids = malloc(kxmsqids_len);
82 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
83 num = msginfo.msgmni;
84 while (num-- && !signaled)
85 if (kxmsqids[num].u.msg_qbytes != 0) {
86 id = IXSEQ_TO_IPCID(num,
87 kxmsqids[num].u.msg_perm);
88 if (msgctl(id, IPC_RMID, NULL) < 0) {
89 if (rmverbose > 1)
90 warn("msqid(%d): ", id);
91 errflg++;
92 } else
93 if (rmverbose)
94 printf(
95 "Removed %s %d\n",
96 IPC_TO_STRING('Q'),
97 id);
98 }
99 return signaled ? -1 : 0; /* errors maybe handled above */
100 }
101
102 if (key) {
103 id = msgget(key, 0);
104 if (id == -1)
105 return -1;
106 }
107
108 return msgctl(id, IPC_RMID, NULL);
109 }
110
111 static int
shmrm(key_t key,int id)112 shmrm(key_t key, int id)
113 {
114
115 if (key == -1 || id == -1) {
116 struct shmid_kernel *kxshmids;
117 size_t kxshmids_len;
118 int num;
119
120 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
121 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
122 kxshmids = malloc(kxshmids_len);
123 kget(X_SHMSEGS, kxshmids, kxshmids_len);
124 num = shminfo.shmmni;
125 while (num-- && !signaled)
126 if (kxshmids[num].u.shm_perm.mode & 0x0800) {
127 id = IXSEQ_TO_IPCID(num,
128 kxshmids[num].u.shm_perm);
129 if (shmctl(id, IPC_RMID, NULL) < 0) {
130 if (rmverbose > 1)
131 warn("shmid(%d): ", id);
132 errflg++;
133 } else
134 if (rmverbose)
135 printf(
136 "Removed %s %d\n",
137 IPC_TO_STRING('M'),
138 id);
139 }
140 return signaled ? -1 : 0; /* errors maybe handled above */
141 }
142
143 if (key) {
144 id = shmget(key, 0, 0);
145 if (id == -1)
146 return -1;
147 }
148
149 return shmctl(id, IPC_RMID, NULL);
150 }
151
152 static int
semrm(key_t key,int id)153 semrm(key_t key, int id)
154 {
155 union semun arg;
156
157 if (key == -1 || id == -1) {
158 struct semid_kernel *kxsema;
159 size_t kxsema_len;
160 int num;
161
162 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
163 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
164 kxsema = malloc(kxsema_len);
165 kget(X_SEMA, kxsema, kxsema_len);
166 num = seminfo.semmni;
167 while (num-- && !signaled)
168 if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
169 id = IXSEQ_TO_IPCID(num,
170 kxsema[num].u.sem_perm);
171 if (semctl(id, 0, IPC_RMID, NULL) < 0) {
172 if (rmverbose > 1)
173 warn("semid(%d): ", id);
174 errflg++;
175 } else
176 if (rmverbose)
177 printf(
178 "Removed %s %d\n",
179 IPC_TO_STRING('S'),
180 id);
181 }
182 return signaled ? -1 : 0; /* errors maybe handled above */
183 }
184
185 if (key) {
186 id = semget(key, 0, 0);
187 if (id == -1)
188 return -1;
189 }
190
191 return semctl(id, 0, IPC_RMID, arg);
192 }
193
194 static void
not_configured(int signo __unused)195 not_configured(int signo __unused)
196 {
197
198 signaled++;
199 }
200
201 int
main(int argc,char * argv[])202 main(int argc, char *argv[])
203 {
204 int c, result, target_id;
205 key_t target_key;
206
207 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
208
209 signaled = 0;
210 switch (c) {
211 case 'v':
212 rmverbose++;
213 break;
214 case 'y':
215 use_sysctl = 0;
216 break;
217 }
218 }
219
220 optind = 1;
221 errflg = 0;
222 signal(SIGSYS, not_configured);
223 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
224
225 signaled = 0;
226 switch (c) {
227 case 'q':
228 case 'm':
229 case 's':
230 target_id = atoi(optarg);
231 if (c == 'q')
232 result = msgrm(0, target_id);
233 else if (c == 'm')
234 result = shmrm(0, target_id);
235 else
236 result = semrm(0, target_id);
237 if (result < 0) {
238 errflg++;
239 if (!signaled)
240 warn("%sid(%d): ",
241 IPC_TO_STR(toupper(c)), target_id);
242 else
243 warnx(
244 "%ss are not configured "
245 "in the running kernel",
246 IPC_TO_STRING(toupper(c)));
247 }
248 break;
249 case 'Q':
250 case 'M':
251 case 'S':
252 target_key = atol(optarg);
253 if (target_key == IPC_PRIVATE) {
254 warnx("can't remove private %ss",
255 IPC_TO_STRING(c));
256 continue;
257 }
258 if (c == 'Q')
259 result = msgrm(target_key, 0);
260 else if (c == 'M')
261 result = shmrm(target_key, 0);
262 else
263 result = semrm(target_key, 0);
264 if (result < 0) {
265 errflg++;
266 if (!signaled)
267 warn("%ss(%ld): ",
268 IPC_TO_STR(c), target_key);
269 else
270 warnx("%ss are not configured "
271 "in the running kernel",
272 IPC_TO_STRING(c));
273 }
274 break;
275 case 'v':
276 case 'y':
277 /* Handled in other getopt() loop */
278 break;
279 case 'W':
280 msgrm(-1, 0);
281 shmrm(-1, 0);
282 semrm(-1, 0);
283 break;
284 case ':':
285 fprintf(stderr,
286 "option -%c requires an argument\n", optopt);
287 usage();
288 case '?':
289 fprintf(stderr, "unrecognized option: -%c\n", optopt);
290 usage();
291 }
292 }
293
294 if (optind != argc) {
295 fprintf(stderr, "unknown argument: %s\n", argv[optind]);
296 usage();
297 }
298 exit(errflg);
299 }
300