1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1994 SigmaSoft, Th. Lockert <[email protected]>
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. The name of the author may not be used to endorse or promote products
16 * derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
19 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
27 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 #include <sys/param.h>
32 #include <sys/proc.h>
33 #define _WANT_SYSVMSG_INTERNALS
34 #include <sys/msg.h>
35 #define _WANT_SYSVSEM_INTERNALS
36 #include <sys/sem.h>
37 #define _WANT_SYSVSHM_INTERNALS
38 #include <sys/shm.h>
39
40 #include <err.h>
41 #include <fcntl.h>
42 #include <grp.h>
43 #include <kvm.h>
44 #include <limits.h>
45 #include <pwd.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50
51 #include "ipc.h"
52
53 char *fmt_perm(u_short);
54 void cvt_time(time_t, char *);
55 void usage(void);
56 uid_t user2uid(char *username);
57
58 void print_kmsqtotal(struct msginfo msginfo);
59 void print_kmsqheader(int option);
60 void print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr);
61 void print_kshmtotal(struct shminfo shminfo);
62 void print_kshmheader(int option);
63 void print_kshmptr(int i, int option, struct shmid_kernel *kshmptr);
64 void print_ksemtotal(struct seminfo seminfo);
65 void print_ksemheader(int option);
66 void print_ksemptr(int i, int option, struct semid_kernel *ksemaptr);
67
68 char *
fmt_perm(u_short mode)69 fmt_perm(u_short mode)
70 {
71 static char buffer[100];
72
73 buffer[0] = '-';
74 buffer[1] = '-';
75 buffer[2] = ((mode & 0400) ? 'r' : '-');
76 buffer[3] = ((mode & 0200) ? 'w' : '-');
77 buffer[4] = ((mode & 0100) ? 'a' : '-');
78 buffer[5] = ((mode & 0040) ? 'r' : '-');
79 buffer[6] = ((mode & 0020) ? 'w' : '-');
80 buffer[7] = ((mode & 0010) ? 'a' : '-');
81 buffer[8] = ((mode & 0004) ? 'r' : '-');
82 buffer[9] = ((mode & 0002) ? 'w' : '-');
83 buffer[10] = ((mode & 0001) ? 'a' : '-');
84 buffer[11] = '\0';
85 return (&buffer[0]);
86 }
87
88 void
cvt_time(time_t t,char * buf)89 cvt_time(time_t t, char *buf)
90 {
91 struct tm *tm;
92
93 if (t == 0) {
94 strcpy(buf, "no-entry");
95 } else {
96 tm = localtime(&t);
97 sprintf(buf, "%2d:%02d:%02d",
98 tm->tm_hour, tm->tm_min, tm->tm_sec);
99 }
100 }
101
102 #define BIGGEST 1
103 #define CREATOR 2
104 #define OUTSTANDING 4
105 #define PID 8
106 #define TIME 16
107
108 int
main(int argc,char * argv[])109 main(int argc, char *argv[])
110 {
111 int display = SHMINFO | MSGINFO | SEMINFO;
112 int option = 0;
113 char *core = NULL, *user = NULL, *namelist = NULL;
114 char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */
115 int i;
116 u_long shmidx;
117 uid_t uid = 0;
118
119 while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTu:y")) != -1)
120 switch (i) {
121 case 'a':
122 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
123 break;
124 case 'b':
125 option |= BIGGEST;
126 break;
127 case 'C':
128 core = optarg;
129 break;
130 case 'c':
131 option |= CREATOR;
132 break;
133 case 'M':
134 display = SHMTOTAL;
135 break;
136 case 'm':
137 display = SHMINFO;
138 break;
139 case 'N':
140 namelist = optarg;
141 break;
142 case 'o':
143 option |= OUTSTANDING;
144 break;
145 case 'p':
146 option |= PID;
147 break;
148 case 'Q':
149 display = MSGTOTAL;
150 break;
151 case 'q':
152 display = MSGINFO;
153 break;
154 case 'S':
155 display = SEMTOTAL;
156 break;
157 case 's':
158 display = SEMINFO;
159 break;
160 case 'T':
161 display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
162 break;
163 case 't':
164 option |= TIME;
165 break;
166 case 'u':
167 user = optarg;
168 uid = user2uid(user);
169 break;
170 case 'y':
171 use_sysctl = 0;
172 break;
173 default:
174 usage();
175 }
176
177 /*
178 * If paths to the exec file or core file were specified, we
179 * aren't operating on the running kernel, so we can't use
180 * sysctl.
181 */
182 if (namelist != NULL || core != NULL)
183 use_sysctl = 0;
184
185 if (!use_sysctl) {
186 kd = kvm_openfiles(namelist, core, NULL, O_RDONLY, kvmoferr);
187 if (kd == NULL)
188 errx(1, "kvm_openfiles: %s", kvmoferr);
189 switch (kvm_nlist(kd, symbols)) {
190 case 0:
191 break;
192 case -1:
193 errx(1, "unable to read kernel symbol table");
194 default:
195 break;
196 }
197 }
198
199 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
200 if (display & (MSGINFO | MSGTOTAL)) {
201 if (display & MSGTOTAL)
202 print_kmsqtotal(msginfo);
203
204 if (display & MSGINFO) {
205 struct msqid_kernel *kxmsqids;
206 size_t kxmsqids_len;
207
208 kxmsqids_len =
209 sizeof(struct msqid_kernel) * msginfo.msgmni;
210 kxmsqids = malloc(kxmsqids_len);
211 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
212
213 print_kmsqheader(option);
214
215 for (i = 0; i < msginfo.msgmni; i += 1) {
216 if (kxmsqids[i].u.msg_qbytes != 0) {
217 if (user &&
218 uid != kxmsqids[i].u.msg_perm.uid)
219 continue;
220
221 print_kmsqptr(i, option, &kxmsqids[i]);
222 }
223
224 }
225
226 printf("\n");
227 }
228 }
229
230 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
231 if (display & (SHMINFO | SHMTOTAL)) {
232
233 if (display & SHMTOTAL)
234 print_kshmtotal(shminfo);
235
236 if (display & SHMINFO) {
237 struct shmid_kernel *kxshmids;
238 size_t kxshmids_len;
239
240 kxshmids_len =
241 sizeof(struct shmid_kernel) * shminfo.shmmni;
242 kxshmids = malloc(kxshmids_len);
243 kget(X_SHMSEGS, kxshmids, kxshmids_len);
244
245 print_kshmheader(option);
246
247 for (shmidx = 0; shmidx < shminfo.shmmni; shmidx += 1) {
248 if (kxshmids[shmidx].u.shm_perm.mode & 0x0800) {
249 if (user &&
250 uid != kxshmids[shmidx].u.shm_perm.uid)
251 continue;
252
253 print_kshmptr(shmidx, option, &kxshmids[shmidx]);
254 }
255 }
256 printf("\n");
257 }
258 }
259
260 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
261 if (display & (SEMINFO | SEMTOTAL)) {
262 struct semid_kernel *kxsema;
263 size_t kxsema_len;
264
265 if (display & SEMTOTAL)
266 print_ksemtotal(seminfo);
267
268 if (display & SEMINFO) {
269 kxsema_len =
270 sizeof(struct semid_kernel) * seminfo.semmni;
271 kxsema = malloc(kxsema_len);
272 kget(X_SEMA, kxsema, kxsema_len);
273
274 print_ksemheader(option);
275
276 for (i = 0; i < seminfo.semmni; i += 1) {
277 if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC)
278 != 0) {
279 if (user &&
280 uid != kxsema[i].u.sem_perm.uid)
281 continue;
282
283 print_ksemptr(i, option, &kxsema[i]);
284
285 }
286 }
287
288 printf("\n");
289 }
290 }
291
292 if (!use_sysctl)
293 kvm_close(kd);
294
295 exit(0);
296 }
297
298 void
print_kmsqtotal(struct msginfo local_msginfo)299 print_kmsqtotal(struct msginfo local_msginfo)
300 {
301
302 printf("msginfo:\n");
303 printf("\tmsgmax: %12d\t(max characters in a message)\n",
304 local_msginfo.msgmax);
305 printf("\tmsgmni: %12d\t(# of message queues)\n",
306 local_msginfo.msgmni);
307 printf("\tmsgmnb: %12d\t(max characters in a message queue)\n",
308 local_msginfo.msgmnb);
309 printf("\tmsgtql: %12d\t(max # of messages in system)\n",
310 local_msginfo.msgtql);
311 printf("\tmsgssz: %12d\t(size of a message segment)\n",
312 local_msginfo.msgssz);
313 printf("\tmsgseg: %12d\t(# of message segments in system)\n\n",
314 local_msginfo.msgseg);
315 }
316
print_kmsqheader(int option)317 void print_kmsqheader(int option)
318 {
319
320 printf("Message Queues:\n");
321 printf("T %12s %12s %-11s %-8s %-8s",
322 "ID", "KEY", "MODE", "OWNER", "GROUP");
323 if (option & CREATOR)
324 printf(" %-8s %-8s", "CREATOR", "CGROUP");
325 if (option & OUTSTANDING)
326 printf(" %20s %20s", "CBYTES", "QNUM");
327 if (option & BIGGEST)
328 printf(" %20s", "QBYTES");
329 if (option & PID)
330 printf(" %12s %12s", "LSPID", "LRPID");
331 if (option & TIME)
332 printf(" %-8s %-8s %-8s", "STIME", "RTIME", "CTIME");
333 printf("\n");
334 }
335
336 void
print_kmsqptr(int i,int option,struct msqid_kernel * kmsqptr)337 print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr)
338 {
339 char stime_buf[100], rtime_buf[100], ctime_buf[100];
340
341 cvt_time(kmsqptr->u.msg_stime, stime_buf);
342 cvt_time(kmsqptr->u.msg_rtime, rtime_buf);
343 cvt_time(kmsqptr->u.msg_ctime, ctime_buf);
344
345 printf("q %12d %12d %s %-8s %-8s",
346 IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm),
347 (int)kmsqptr->u.msg_perm.key,
348 fmt_perm(kmsqptr->u.msg_perm.mode),
349 user_from_uid(kmsqptr->u.msg_perm.uid, 0),
350 group_from_gid(kmsqptr->u.msg_perm.gid, 0));
351
352 if (option & CREATOR)
353 printf(" %-8s %-8s",
354 user_from_uid(kmsqptr->u.msg_perm.cuid, 0),
355 group_from_gid(kmsqptr->u.msg_perm.cgid, 0));
356
357 if (option & OUTSTANDING)
358 printf(" %12lu %12lu",
359 kmsqptr->u.msg_cbytes,
360 kmsqptr->u.msg_qnum);
361
362 if (option & BIGGEST)
363 printf(" %20lu", kmsqptr->u.msg_qbytes);
364
365 if (option & PID)
366 printf(" %12d %12d",
367 kmsqptr->u.msg_lspid,
368 kmsqptr->u.msg_lrpid);
369
370 if (option & TIME)
371 printf(" %s %s %s",
372 stime_buf,
373 rtime_buf,
374 ctime_buf);
375
376 printf("\n");
377 }
378
379 void
print_kshmtotal(struct shminfo local_shminfo)380 print_kshmtotal(struct shminfo local_shminfo)
381 {
382
383 printf("shminfo:\n");
384 printf("\tshmmax: %12lu\t(max shared memory segment size)\n",
385 local_shminfo.shmmax);
386 printf("\tshmmin: %12lu\t(min shared memory segment size)\n",
387 local_shminfo.shmmin);
388 printf("\tshmmni: %12lu\t(max number of shared memory identifiers)\n",
389 local_shminfo.shmmni);
390 printf("\tshmseg: %12lu\t(max shared memory segments per process)\n",
391 local_shminfo.shmseg);
392 printf("\tshmall: %12lu\t(max amount of shared memory in pages)\n\n",
393 local_shminfo.shmall);
394 }
395
396 void
print_kshmheader(int option)397 print_kshmheader(int option)
398 {
399
400 printf("Shared Memory:\n");
401 printf("T %12s %12s %-11s %-8s %-8s",
402 "ID", "KEY", "MODE", "OWNER", "GROUP");
403 if (option & CREATOR)
404 printf(" %-8s %-8s", "CREATOR", "CGROUP");
405 if (option & OUTSTANDING)
406 printf(" %12s", "NATTCH");
407 if (option & BIGGEST)
408 printf(" %12s", "SEGSZ");
409 if (option & PID)
410 printf(" %12s %12s", "CPID", "LPID");
411 if (option & TIME)
412 printf(" %-8s %-8s %-8s", "ATIME", "DTIME", "CTIME");
413 printf("\n");
414 }
415
416 void
print_kshmptr(int i,int option,struct shmid_kernel * kshmptr)417 print_kshmptr(int i, int option, struct shmid_kernel *kshmptr)
418 {
419 char atime_buf[100], dtime_buf[100], ctime_buf[100];
420
421 cvt_time(kshmptr->u.shm_atime, atime_buf);
422 cvt_time(kshmptr->u.shm_dtime, dtime_buf);
423 cvt_time(kshmptr->u.shm_ctime, ctime_buf);
424
425 printf("m %12d %12d %s %-8s %-8s",
426 IXSEQ_TO_IPCID(i, kshmptr->u.shm_perm),
427 (int)kshmptr->u.shm_perm.key,
428 fmt_perm(kshmptr->u.shm_perm.mode),
429 user_from_uid(kshmptr->u.shm_perm.uid, 0),
430 group_from_gid(kshmptr->u.shm_perm.gid, 0));
431
432 if (option & CREATOR)
433 printf(" %-8s %-8s",
434 user_from_uid(kshmptr->u.shm_perm.cuid, 0),
435 group_from_gid(kshmptr->u.shm_perm.cgid, 0));
436
437 if (option & OUTSTANDING)
438 printf(" %12d",
439 kshmptr->u.shm_nattch);
440
441 if (option & BIGGEST)
442 printf(" %12zu",
443 kshmptr->u.shm_segsz);
444
445 if (option & PID)
446 printf(" %12d %12d",
447 kshmptr->u.shm_cpid,
448 kshmptr->u.shm_lpid);
449
450 if (option & TIME)
451 printf(" %s %s %s",
452 atime_buf,
453 dtime_buf,
454 ctime_buf);
455
456 printf("\n");
457 }
458
459 void
print_ksemtotal(struct seminfo local_seminfo)460 print_ksemtotal(struct seminfo local_seminfo)
461 {
462
463 printf("seminfo:\n");
464 printf("\tsemmni: %12d\t(# of semaphore identifiers)\n",
465 local_seminfo.semmni);
466 printf("\tsemmns: %12d\t(# of semaphores in system)\n",
467 local_seminfo.semmns);
468 printf("\tsemmnu: %12d\t(# of undo structures in system)\n",
469 local_seminfo.semmnu);
470 printf("\tsemmsl: %12d\t(max # of semaphores per id)\n",
471 local_seminfo.semmsl);
472 printf("\tsemopm: %12d\t(max # of operations per semop call)\n",
473 local_seminfo.semopm);
474 printf("\tsemume: %12d\t(max # of undo entries per process)\n",
475 local_seminfo.semume);
476 printf("\tsemusz: %12d\t(size in bytes of undo structure)\n",
477 local_seminfo.semusz);
478 printf("\tsemvmx: %12d\t(semaphore maximum value)\n",
479 local_seminfo.semvmx);
480 printf("\tsemaem: %12d\t(adjust on exit max value)\n\n",
481 local_seminfo.semaem);
482 }
483
484 void
print_ksemheader(int option)485 print_ksemheader(int option)
486 {
487
488 printf("Semaphores:\n");
489 printf("T %12s %12s %-11s %-8s %-8s",
490 "ID", "KEY", "MODE", "OWNER", "GROUP");
491 if (option & CREATOR)
492 printf(" %-8s %-8s", "CREATOR", "CGROUP");
493 if (option & BIGGEST)
494 printf(" %12s", "NSEMS");
495 if (option & TIME)
496 printf(" %-8s %-8s", "OTIME", "CTIME");
497 printf("\n");
498 }
499
500 void
print_ksemptr(int i,int option,struct semid_kernel * ksemaptr)501 print_ksemptr(int i, int option, struct semid_kernel *ksemaptr)
502 {
503 char ctime_buf[100], otime_buf[100];
504
505 cvt_time(ksemaptr->u.sem_otime, otime_buf);
506 cvt_time(ksemaptr->u.sem_ctime, ctime_buf);
507
508 printf("s %12d %12d %s %-8s %-8s",
509 IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm),
510 (int)ksemaptr->u.sem_perm.key,
511 fmt_perm(ksemaptr->u.sem_perm.mode),
512 user_from_uid(ksemaptr->u.sem_perm.uid, 0),
513 group_from_gid(ksemaptr->u.sem_perm.gid, 0));
514
515 if (option & CREATOR)
516 printf(" %-8s %-8s",
517 user_from_uid(ksemaptr->u.sem_perm.cuid, 0),
518 group_from_gid(ksemaptr->u.sem_perm.cgid, 0));
519
520 if (option & BIGGEST)
521 printf(" %12d",
522 ksemaptr->u.sem_nsems);
523
524 if (option & TIME)
525 printf(" %s %s",
526 otime_buf,
527 ctime_buf);
528
529 printf("\n");
530 }
531
532 uid_t
user2uid(char * username)533 user2uid(char *username)
534 {
535 struct passwd *pwd;
536 uid_t uid;
537 char *r;
538
539 uid = strtoul(username, &r, 0);
540 if (!*r && r != username)
541 return (uid);
542 if ((pwd = getpwnam(username)) == NULL)
543 errx(1, "getpwnam failed: No such user");
544 endpwent();
545 return (pwd->pw_uid);
546 }
547
548 void
usage(void)549 usage(void)
550 {
551
552 fprintf(stderr,
553 "usage: "
554 "ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n");
555 exit(1);
556 }
557