1 /*
2 * Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
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. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/proc.h>
33 #define _KERNEL
34 #include <sys/sem.h>
35 #include <sys/shm.h>
36 #include <sys/msg.h>
37 #undef _KERNEL
38
39 #include <err.h>
40 #include <fcntl.h>
41 #include <grp.h>
42 #include <kvm.h>
43 #include <limits.h>
44 #include <pwd.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49
50 #include "ipc.h"
51
52 char *fmt_perm(u_short);
53 void cvt_time(time_t, char *);
54 void usage(void);
55 uid_t user2uid(char *username);
56
57 void print_kmsqtotal(struct msginfo msginfo);
58 void print_kmsqheader(int option);
59 void print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr);
60 void print_kshmtotal(struct shminfo shminfo);
61 void print_kshmheader(int option);
62 void print_kshmptr(int i, int option, struct shmid_kernel *kshmptr);
63 void print_ksemtotal(struct seminfo seminfo);
64 void print_ksemheader(int option);
65 void print_ksemptr(int i, int option, struct semid_kernel *ksemaptr);
66
67 char *
fmt_perm(u_short mode)68 fmt_perm(u_short mode)
69 {
70 static char buffer[100];
71
72 buffer[0] = '-';
73 buffer[1] = '-';
74 buffer[2] = ((mode & 0400) ? 'r' : '-');
75 buffer[3] = ((mode & 0200) ? 'w' : '-');
76 buffer[4] = ((mode & 0100) ? 'a' : '-');
77 buffer[5] = ((mode & 0040) ? 'r' : '-');
78 buffer[6] = ((mode & 0020) ? 'w' : '-');
79 buffer[7] = ((mode & 0010) ? 'a' : '-');
80 buffer[8] = ((mode & 0004) ? 'r' : '-');
81 buffer[9] = ((mode & 0002) ? 'w' : '-');
82 buffer[10] = ((mode & 0001) ? 'a' : '-');
83 buffer[11] = '\0';
84 return (&buffer[0]);
85 }
86
87 void
cvt_time(time_t t,char * buf)88 cvt_time(time_t t, char *buf)
89 {
90 struct tm *tm;
91
92 if (t == 0) {
93 strcpy(buf, "no-entry");
94 } else {
95 tm = localtime(&t);
96 sprintf(buf, "%2d:%02d:%02d",
97 tm->tm_hour, tm->tm_min, tm->tm_sec);
98 }
99 }
100
101 #define BIGGEST 1
102 #define CREATOR 2
103 #define OUTSTANDING 4
104 #define PID 8
105 #define TIME 16
106
107 int
main(int argc,char * argv[])108 main(int argc, char *argv[])
109 {
110 int display = SHMINFO | MSGINFO | SEMINFO;
111 int option = 0;
112 char *core = NULL, *user = NULL, *namelist = NULL;
113 char kvmoferr[_POSIX2_LINE_MAX]; /* Error buf for kvm_openfiles. */
114 int i;
115 u_long shmidx;
116 uid_t uid = 0;
117
118 while ((i = getopt(argc, argv, "MmQqSsabC:cN:optTu:y")) != -1)
119 switch (i) {
120 case 'a':
121 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
122 break;
123 case 'b':
124 option |= BIGGEST;
125 break;
126 case 'C':
127 core = optarg;
128 break;
129 case 'c':
130 option |= CREATOR;
131 break;
132 case 'M':
133 display = SHMTOTAL;
134 break;
135 case 'm':
136 display = SHMINFO;
137 break;
138 case 'N':
139 namelist = optarg;
140 break;
141 case 'o':
142 option |= OUTSTANDING;
143 break;
144 case 'p':
145 option |= PID;
146 break;
147 case 'Q':
148 display = MSGTOTAL;
149 break;
150 case 'q':
151 display = MSGINFO;
152 break;
153 case 'S':
154 display = SEMTOTAL;
155 break;
156 case 's':
157 display = SEMINFO;
158 break;
159 case 'T':
160 display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
161 break;
162 case 't':
163 option |= TIME;
164 break;
165 case 'u':
166 user = optarg;
167 uid = user2uid(user);
168 break;
169 case 'y':
170 use_sysctl = 0;
171 break;
172 default:
173 usage();
174 }
175
176 /*
177 * If paths to the exec file or core file were specified, we
178 * aren't operating on the running kernel, so we can't use
179 * sysctl.
180 */
181 if (namelist != NULL || core != NULL)
182 use_sysctl = 0;
183
184 if (!use_sysctl) {
185 kd = kvm_openfiles(namelist, core, NULL, O_RDONLY, kvmoferr);
186 if (kd == NULL)
187 errx(1, "kvm_openfiles: %s", kvmoferr);
188 switch (kvm_nlist(kd, symbols)) {
189 case 0:
190 break;
191 case -1:
192 errx(1, "unable to read kernel symbol table");
193 default:
194 break;
195 }
196 }
197
198 kget(X_MSGINFO, &msginfo, sizeof(msginfo));
199 if ((display & (MSGINFO | MSGTOTAL))) {
200 if (display & MSGTOTAL)
201 print_kmsqtotal(msginfo);
202
203 if (display & MSGINFO) {
204 struct msqid_kernel *kxmsqids;
205 size_t kxmsqids_len;
206
207 kxmsqids_len =
208 sizeof(struct msqid_kernel) * msginfo.msgmni;
209 kxmsqids = malloc(kxmsqids_len);
210 kget(X_MSQIDS, kxmsqids, kxmsqids_len);
211
212 print_kmsqheader(option);
213
214 for (i = 0; i < msginfo.msgmni; i += 1) {
215 if (kxmsqids[i].u.msg_qbytes != 0) {
216 if (user &&
217 uid != kxmsqids[i].u.msg_perm.uid)
218 continue;
219
220 print_kmsqptr(i, option, &kxmsqids[i]);
221 }
222
223 }
224
225 printf("\n");
226 }
227 } else
228 if (display & (MSGINFO | MSGTOTAL)) {
229 fprintf(stderr,
230 "SVID messages facility "
231 "not configured in the system\n");
232 }
233
234 kget(X_SHMINFO, &shminfo, sizeof(shminfo));
235 if ((display & (SHMINFO | SHMTOTAL))) {
236
237 if (display & SHMTOTAL)
238 print_kshmtotal(shminfo);
239
240 if (display & SHMINFO) {
241 struct shmid_kernel *kxshmids;
242 size_t kxshmids_len;
243
244 kxshmids_len =
245 sizeof(struct shmid_kernel) * shminfo.shmmni;
246 kxshmids = malloc(kxshmids_len);
247 kget(X_SHMSEGS, kxshmids, kxshmids_len);
248
249 print_kshmheader(option);
250
251 for (shmidx = 0; shmidx < shminfo.shmmni; shmidx += 1) {
252 if (kxshmids[shmidx].u.shm_perm.mode & 0x0800) {
253 if (user &&
254 uid != kxshmids[shmidx].u.shm_perm.uid)
255 continue;
256
257 print_kshmptr(shmidx, option, &kxshmids[shmidx]);
258 }
259 }
260 printf("\n");
261 }
262 } else
263 if (display & (SHMINFO | SHMTOTAL)) {
264 fprintf(stderr,
265 "SVID shared memory facility "
266 "not configured in the system\n");
267 }
268
269 kget(X_SEMINFO, &seminfo, sizeof(seminfo));
270 if ((display & (SEMINFO | SEMTOTAL))) {
271 struct semid_kernel *kxsema;
272 size_t kxsema_len;
273
274 if (display & SEMTOTAL)
275 print_ksemtotal(seminfo);
276
277 if (display & SEMINFO) {
278 kxsema_len =
279 sizeof(struct semid_kernel) * seminfo.semmni;
280 kxsema = malloc(kxsema_len);
281 kget(X_SEMA, kxsema, kxsema_len);
282
283 print_ksemheader(option);
284
285 for (i = 0; i < seminfo.semmni; i += 1) {
286 if ((kxsema[i].u.sem_perm.mode & SEM_ALLOC)
287 != 0) {
288 if (user &&
289 uid != kxsema[i].u.sem_perm.uid)
290 continue;
291
292 print_ksemptr(i, option, &kxsema[i]);
293
294 }
295 }
296
297 printf("\n");
298 }
299 } else
300 if (display & (SEMINFO | SEMTOTAL)) {
301 fprintf(stderr,
302 "SVID semaphores facility "
303 "not configured in the system\n");
304 }
305
306 if (!use_sysctl)
307 kvm_close(kd);
308
309 exit(0);
310 }
311
312 void
print_kmsqtotal(struct msginfo local_msginfo)313 print_kmsqtotal(struct msginfo local_msginfo)
314 {
315
316 printf("msginfo:\n");
317 printf("\tmsgmax: %12d\t(max characters in a message)\n",
318 local_msginfo.msgmax);
319 printf("\tmsgmni: %12d\t(# of message queues)\n",
320 local_msginfo.msgmni);
321 printf("\tmsgmnb: %12d\t(max characters in a message queue)\n",
322 local_msginfo.msgmnb);
323 printf("\tmsgtql: %12d\t(max # of messages in system)\n",
324 local_msginfo.msgtql);
325 printf("\tmsgssz: %12d\t(size of a message segment)\n",
326 local_msginfo.msgssz);
327 printf("\tmsgseg: %12d\t(# of message segments in system)\n\n",
328 local_msginfo.msgseg);
329 }
330
print_kmsqheader(int option)331 void print_kmsqheader(int option)
332 {
333
334 printf("Message Queues:\n");
335 printf("T %12s %12s %-11s %-8s %-8s",
336 "ID", "KEY", "MODE", "OWNER", "GROUP");
337 if (option & CREATOR)
338 printf(" %-8s %-8s", "CREATOR", "CGROUP");
339 if (option & OUTSTANDING)
340 printf(" %20s %20s", "CBYTES", "QNUM");
341 if (option & BIGGEST)
342 printf(" %20s", "QBYTES");
343 if (option & PID)
344 printf(" %12s %12s", "LSPID", "LRPID");
345 if (option & TIME)
346 printf(" %-8s %-8s %-8s", "STIME", "RTIME", "CTIME");
347 printf("\n");
348 }
349
350 void
print_kmsqptr(int i,int option,struct msqid_kernel * kmsqptr)351 print_kmsqptr(int i, int option, struct msqid_kernel *kmsqptr)
352 {
353 char stime_buf[100], rtime_buf[100], ctime_buf[100];
354
355 cvt_time(kmsqptr->u.msg_stime, stime_buf);
356 cvt_time(kmsqptr->u.msg_rtime, rtime_buf);
357 cvt_time(kmsqptr->u.msg_ctime, ctime_buf);
358
359 printf("q %12d %12d %s %-8s %-8s",
360 IXSEQ_TO_IPCID(i, kmsqptr->u.msg_perm),
361 (int)kmsqptr->u.msg_perm.key,
362 fmt_perm(kmsqptr->u.msg_perm.mode),
363 user_from_uid(kmsqptr->u.msg_perm.uid, 0),
364 group_from_gid(kmsqptr->u.msg_perm.gid, 0));
365
366 if (option & CREATOR)
367 printf(" %-8s %-8s",
368 user_from_uid(kmsqptr->u.msg_perm.cuid, 0),
369 group_from_gid(kmsqptr->u.msg_perm.cgid, 0));
370
371 if (option & OUTSTANDING)
372 printf(" %12lu %12lu",
373 kmsqptr->u.msg_cbytes,
374 kmsqptr->u.msg_qnum);
375
376 if (option & BIGGEST)
377 printf(" %20lu", kmsqptr->u.msg_qbytes);
378
379 if (option & PID)
380 printf(" %12d %12d",
381 kmsqptr->u.msg_lspid,
382 kmsqptr->u.msg_lrpid);
383
384 if (option & TIME)
385 printf(" %s %s %s",
386 stime_buf,
387 rtime_buf,
388 ctime_buf);
389
390 printf("\n");
391 }
392
393 void
print_kshmtotal(struct shminfo local_shminfo)394 print_kshmtotal(struct shminfo local_shminfo)
395 {
396
397 printf("shminfo:\n");
398 printf("\tshmmax: %12lu\t(max shared memory segment size)\n",
399 local_shminfo.shmmax);
400 printf("\tshmmin: %12lu\t(min shared memory segment size)\n",
401 local_shminfo.shmmin);
402 printf("\tshmmni: %12lu\t(max number of shared memory identifiers)\n",
403 local_shminfo.shmmni);
404 printf("\tshmseg: %12lu\t(max shared memory segments per process)\n",
405 local_shminfo.shmseg);
406 printf("\tshmall: %12lu\t(max amount of shared memory in pages)\n\n",
407 local_shminfo.shmall);
408 }
409
410 void
print_kshmheader(int option)411 print_kshmheader(int option)
412 {
413
414 printf("Shared Memory:\n");
415 printf("T %12s %12s %-11s %-8s %-8s",
416 "ID", "KEY", "MODE", "OWNER", "GROUP");
417 if (option & CREATOR)
418 printf(" %-8s %-8s", "CREATOR", "CGROUP");
419 if (option & OUTSTANDING)
420 printf(" %12s", "NATTCH");
421 if (option & BIGGEST)
422 printf(" %12s", "SEGSZ");
423 if (option & PID)
424 printf(" %12s %12s", "CPID", "LPID");
425 if (option & TIME)
426 printf(" %-8s %-8s %-8s", "ATIME", "DTIME", "CTIME");
427 printf("\n");
428 }
429
430 void
print_kshmptr(int i,int option,struct shmid_kernel * kshmptr)431 print_kshmptr(int i, int option, struct shmid_kernel *kshmptr)
432 {
433 char atime_buf[100], dtime_buf[100], ctime_buf[100];
434
435 cvt_time(kshmptr->u.shm_atime, atime_buf);
436 cvt_time(kshmptr->u.shm_dtime, dtime_buf);
437 cvt_time(kshmptr->u.shm_ctime, ctime_buf);
438
439 printf("m %12d %12d %s %-8s %-8s",
440 IXSEQ_TO_IPCID(i, kshmptr->u.shm_perm),
441 (int)kshmptr->u.shm_perm.key,
442 fmt_perm(kshmptr->u.shm_perm.mode),
443 user_from_uid(kshmptr->u.shm_perm.uid, 0),
444 group_from_gid(kshmptr->u.shm_perm.gid, 0));
445
446 if (option & CREATOR)
447 printf(" %-8s %-8s",
448 user_from_uid(kshmptr->u.shm_perm.cuid, 0),
449 group_from_gid(kshmptr->u.shm_perm.cgid, 0));
450
451 if (option & OUTSTANDING)
452 printf(" %12d",
453 kshmptr->u.shm_nattch);
454
455 if (option & BIGGEST)
456 printf(" %12zu",
457 kshmptr->u.shm_segsz);
458
459 if (option & PID)
460 printf(" %12d %12d",
461 kshmptr->u.shm_cpid,
462 kshmptr->u.shm_lpid);
463
464 if (option & TIME)
465 printf(" %s %s %s",
466 atime_buf,
467 dtime_buf,
468 ctime_buf);
469
470 printf("\n");
471 }
472
473 void
print_ksemtotal(struct seminfo local_seminfo)474 print_ksemtotal(struct seminfo local_seminfo)
475 {
476
477 printf("seminfo:\n");
478 printf("\tsemmni: %12d\t(# of semaphore identifiers)\n",
479 local_seminfo.semmni);
480 printf("\tsemmns: %12d\t(# of semaphores in system)\n",
481 local_seminfo.semmns);
482 printf("\tsemmnu: %12d\t(# of undo structures in system)\n",
483 local_seminfo.semmnu);
484 printf("\tsemmsl: %12d\t(max # of semaphores per id)\n",
485 local_seminfo.semmsl);
486 printf("\tsemopm: %12d\t(max # of operations per semop call)\n",
487 local_seminfo.semopm);
488 printf("\tsemume: %12d\t(max # of undo entries per process)\n",
489 local_seminfo.semume);
490 printf("\tsemusz: %12d\t(size in bytes of undo structure)\n",
491 local_seminfo.semusz);
492 printf("\tsemvmx: %12d\t(semaphore maximum value)\n",
493 local_seminfo.semvmx);
494 printf("\tsemaem: %12d\t(adjust on exit max value)\n\n",
495 local_seminfo.semaem);
496 }
497
498 void
print_ksemheader(int option)499 print_ksemheader(int option)
500 {
501
502 printf("Semaphores:\n");
503 printf("T %12s %12s %-11s %-8s %-8s",
504 "ID", "KEY", "MODE", "OWNER", "GROUP");
505 if (option & CREATOR)
506 printf(" %-8s %-8s", "CREATOR", "CGROUP");
507 if (option & BIGGEST)
508 printf(" %12s", "NSEMS");
509 if (option & TIME)
510 printf(" %-8s %-8s", "OTIME", "CTIME");
511 printf("\n");
512 }
513
514 void
print_ksemptr(int i,int option,struct semid_kernel * ksemaptr)515 print_ksemptr(int i, int option, struct semid_kernel *ksemaptr)
516 {
517 char ctime_buf[100], otime_buf[100];
518
519 cvt_time(ksemaptr->u.sem_otime, otime_buf);
520 cvt_time(ksemaptr->u.sem_ctime, ctime_buf);
521
522 printf("s %12d %12d %s %-8s %-8s",
523 IXSEQ_TO_IPCID(i, ksemaptr->u.sem_perm),
524 (int)ksemaptr->u.sem_perm.key,
525 fmt_perm(ksemaptr->u.sem_perm.mode),
526 user_from_uid(ksemaptr->u.sem_perm.uid, 0),
527 group_from_gid(ksemaptr->u.sem_perm.gid, 0));
528
529 if (option & CREATOR)
530 printf(" %-8s %-8s",
531 user_from_uid(ksemaptr->u.sem_perm.cuid, 0),
532 group_from_gid(ksemaptr->u.sem_perm.cgid, 0));
533
534 if (option & BIGGEST)
535 printf(" %12d",
536 ksemaptr->u.sem_nsems);
537
538 if (option & TIME)
539 printf(" %s %s",
540 otime_buf,
541 ctime_buf);
542
543 printf("\n");
544 }
545
546 uid_t
user2uid(char * username)547 user2uid(char *username)
548 {
549 struct passwd *pwd;
550 uid_t uid;
551 char *r;
552
553 uid = strtoul(username, &r, 0);
554 if (!*r && r != username)
555 return (uid);
556 if ((pwd = getpwnam(username)) == NULL)
557 errx(1, "getpwnam failed: No such user");
558 endpwent();
559 return (pwd->pw_uid);
560 }
561
562 void
usage(void)563 usage(void)
564 {
565
566 fprintf(stderr,
567 "usage: "
568 "ipcs [-abcmopqstyMQST] [-C corefile] [-N namelist] [-u user]\n");
569 exit(1);
570 }
571