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