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
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
35
36 #include <sys/param.h>
37 #define _WANT_MSG_PROTOTYPES
38 #define _WANT_SEM_PROTOTYPES
39 #define _WANT_SHM_PROTOTYPES
40 #define _KERNEL
41 #include <sys/sem.h>
42 #include <sys/shm.h>
43 #include <sys/msg.h>
44 #undef _KERNEL
45
46 #include <ctype.h>
47 #include <err.h>
48 #include <grp.h>
49 #include <kvm.h>
50 #include <stdio.h>
51 #include <stdlib.h>
52 #include <unistd.h>
53
54 #include "ipc.h"
55
56 static int signaled;
57 static int errflg;
58 static int rmverbose = 0;
59
60 static void
usage(void)61 usage(void)
62 {
63
64 fprintf(stderr,
65 "usage: ipcrm [-W] [-v[v]]\n"
66 " [-q msqid] [-m shmid] [-s semid]\n"
67 " [-Q msgkey] [-M shmkey] [-S semkey] ...\n");
68 exit(1);
69 }
70
71 static int
msgrm(key_t key,int id)72 msgrm(key_t key, int id)
73 {
74
75 if (key == -1 || id == -1) {
76 struct msqid_kernel *kxmsqids;
77 size_t kxmsqids_len;
78 int num;
79
80 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
81 kxmsqids_len = sizeof(struct msqid_kernel) * msginfo.msgmni;
82 kxmsqids = malloc(kxmsqids_len);
83 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
84 num = msginfo.msgmni;
85 while (num-- && !signaled)
86 if (kxmsqids[num].u.msg_qbytes != 0) {
87 id = IXSEQ_TO_IPCID(num,
88 kxmsqids[num].u.msg_perm);
89 if (msgctl(id, IPC_RMID, NULL) < 0) {
90 if (rmverbose > 1)
91 warn("msqid(%d): ", id);
92 errflg++;
93 } else
94 if (rmverbose)
95 printf(
96 "Removed %s %d\n",
97 IPC_TO_STRING('Q'),
98 id);
99 }
100 return signaled ? -1 : 0; /* errors maybe handled above */
101 }
102
103 if (key) {
104 id = msgget(key, 0);
105 if (id == -1)
106 return -1;
107 }
108
109 return msgctl(id, IPC_RMID, NULL);
110 }
111
112 static int
shmrm(key_t key,int id)113 shmrm(key_t key, int id)
114 {
115
116 if (key == -1 || id == -1) {
117 struct shmid_kernel *kxshmids;
118 size_t kxshmids_len;
119 int num;
120
121 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
122 kxshmids_len = sizeof(struct shmid_kernel) * shminfo.shmmni;
123 kxshmids = malloc(kxshmids_len);
124 kget(X_SHMSEGS, kxshmids, kxshmids_len);
125 num = shminfo.shmmni;
126 while (num-- && !signaled)
127 if (kxshmids[num].u.shm_perm.mode & 0x0800) {
128 id = IXSEQ_TO_IPCID(num,
129 kxshmids[num].u.shm_perm);
130 if (shmctl(id, IPC_RMID, NULL) < 0) {
131 if (rmverbose > 1)
132 warn("shmid(%d): ", id);
133 errflg++;
134 } else
135 if (rmverbose)
136 printf(
137 "Removed %s %d\n",
138 IPC_TO_STRING('M'),
139 id);
140 }
141 return signaled ? -1 : 0; /* errors maybe handled above */
142 }
143
144 if (key) {
145 id = shmget(key, 0, 0);
146 if (id == -1)
147 return -1;
148 }
149
150 return shmctl(id, IPC_RMID, NULL);
151 }
152
153 static int
semrm(key_t key,int id)154 semrm(key_t key, int id)
155 {
156 union semun arg;
157
158 if (key == -1 || id == -1) {
159 struct semid_kernel *kxsema;
160 size_t kxsema_len;
161 int num;
162
163 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
164 kxsema_len = sizeof(struct semid_kernel) * seminfo.semmni;
165 kxsema = malloc(kxsema_len);
166 kget(X_SEMA, kxsema, kxsema_len);
167 num = seminfo.semmni;
168 while (num-- && !signaled)
169 if ((kxsema[num].u.sem_perm.mode & SEM_ALLOC) != 0) {
170 id = IXSEQ_TO_IPCID(num,
171 kxsema[num].u.sem_perm);
172 if (semctl(id, 0, IPC_RMID, NULL) < 0) {
173 if (rmverbose > 1)
174 warn("semid(%d): ", id);
175 errflg++;
176 } else
177 if (rmverbose)
178 printf(
179 "Removed %s %d\n",
180 IPC_TO_STRING('S'),
181 id);
182 }
183 return signaled ? -1 : 0; /* errors maybe handled above */
184 }
185
186 if (key) {
187 id = semget(key, 0, 0);
188 if (id == -1)
189 return -1;
190 }
191
192 return semctl(id, 0, IPC_RMID, arg);
193 }
194
195 static void
not_configured(int signo __unused)196 not_configured(int signo __unused)
197 {
198
199 signaled++;
200 }
201
202 int
main(int argc,char * argv[])203 main(int argc, char *argv[])
204 {
205 int c, result, target_id;
206 key_t target_key;
207
208 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
209
210 signaled = 0;
211 switch (c) {
212 case 'v':
213 rmverbose++;
214 break;
215 case 'y':
216 use_sysctl = 0;
217 break;
218 }
219 }
220
221 optind = 1;
222 errflg = 0;
223 signal(SIGSYS, not_configured);
224 while ((c = getopt(argc, argv, "q:m:s:Q:M:S:vWy")) != -1) {
225
226 signaled = 0;
227 switch (c) {
228 case 'q':
229 case 'm':
230 case 's':
231 target_id = atoi(optarg);
232 if (c == 'q')
233 result = msgrm(0, target_id);
234 else if (c == 'm')
235 result = shmrm(0, target_id);
236 else
237 result = semrm(0, target_id);
238 if (result < 0) {
239 errflg++;
240 if (!signaled)
241 warn("%sid(%d): ",
242 IPC_TO_STR(toupper(c)), target_id);
243 else
244 warnx(
245 "%ss are not configured "
246 "in the running kernel",
247 IPC_TO_STRING(toupper(c)));
248 }
249 break;
250 case 'Q':
251 case 'M':
252 case 'S':
253 target_key = atol(optarg);
254 if (target_key == IPC_PRIVATE) {
255 warnx("can't remove private %ss",
256 IPC_TO_STRING(c));
257 continue;
258 }
259 if (c == 'Q')
260 result = msgrm(target_key, 0);
261 else if (c == 'M')
262 result = shmrm(target_key, 0);
263 else
264 result = semrm(target_key, 0);
265 if (result < 0) {
266 errflg++;
267 if (!signaled)
268 warn("%ss(%ld): ",
269 IPC_TO_STR(c), target_key);
270 else
271 warnx("%ss are not configured "
272 "in the running kernel",
273 IPC_TO_STRING(c));
274 }
275 break;
276 case 'v':
277 case 'y':
278 /* Handled in other getopt() loop */
279 break;
280 case 'W':
281 msgrm(-1, 0);
282 shmrm(-1, 0);
283 semrm(-1, 0);
284 break;
285 case ':':
286 fprintf(stderr,
287 "option -%c requires an argument\n", optopt);
288 usage();
289 case '?':
290 fprintf(stderr, "unrecognized option: -%c\n", optopt);
291 usage();
292 }
293 }
294
295 if (optind != argc) {
296 fprintf(stderr, "unknown argument: %s\n", argv[optind]);
297 usage();
298 }
299 exit(errflg);
300 }
301