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 * $FreeBSD: src/usr.bin/ipcs/ipcs.c,v 1.12.2.4 2003/04/08 11:01:34 tjr Exp $
28 */
29
30 #define _KERNEL_STRUCTURES
31
32 #include <err.h>
33 #include <fcntl.h>
34 #include <grp.h>
35 #include <kvm.h>
36 #include <nlist.h>
37 #include <paths.h>
38 #include <pwd.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43
44 #include <sys/types.h>
45 #include <sys/param.h>
46 #include <sys/time.h>
47 #include <sys/ipc.h>
48 #include <sys/sem.h>
49 #include <sys/shm.h>
50 #include <sys/msg.h>
51
52 struct semid_pool *sema;
53 struct seminfo seminfo;
54 struct msginfo msginfo;
55 struct msqid_ds *msqids;
56 struct shminfo shminfo;
57 struct shmid_ds *shmsegs;
58
59 static void usage(void);
60 static uid_t user2uid(const char *);
61 static gid_t grp2gid(const char *);
62
63 static struct nlist symbols[] = {
64 { .n_name = "_sema" },
65 #define X_SEMA 0
66 { .n_name = "_seminfo" },
67 #define X_SEMINFO 1
68 { .n_name = "_msginfo" },
69 #define X_MSGINFO 2
70 { .n_name = "_msqids" },
71 #define X_MSQIDS 3
72 { .n_name = "_shminfo" },
73 #define X_SHMINFO 4
74 { .n_name = "_shmsegs" },
75 #define X_SHMSEGS 5
76 { .n_name = NULL }
77 };
78
79 static kvm_t *kd;
80
81 static char *
fmt_perm(u_short mode)82 fmt_perm(u_short mode)
83 {
84 static char buffer[100];
85
86 buffer[0] = '-';
87 buffer[1] = '-';
88 buffer[2] = ((mode & 0400) ? 'r' : '-');
89 buffer[3] = ((mode & 0200) ? 'w' : '-');
90 buffer[4] = ((mode & 0100) ? 'a' : '-');
91 buffer[5] = ((mode & 0040) ? 'r' : '-');
92 buffer[6] = ((mode & 0020) ? 'w' : '-');
93 buffer[7] = ((mode & 0010) ? 'a' : '-');
94 buffer[8] = ((mode & 0004) ? 'r' : '-');
95 buffer[9] = ((mode & 0002) ? 'w' : '-');
96 buffer[10] = ((mode & 0001) ? 'a' : '-');
97 buffer[11] = '\0';
98 return (&buffer[0]);
99 }
100
101 static void
cvt_time(time_t t,char * buf)102 cvt_time(time_t t, char *buf)
103 {
104 struct tm *tm;
105
106 if (t == 0) {
107 strcpy(buf, "noentry");
108 } else {
109 tm = localtime(&t);
110 sprintf(buf, "%2d:%02d:%02d",
111 tm->tm_hour, tm->tm_min, tm->tm_sec);
112 }
113 }
114 #define SHMINFO 1
115 #define SHMTOTAL 2
116 #define MSGINFO 4
117 #define MSGTOTAL 8
118 #define SEMINFO 16
119 #define SEMTOTAL 32
120
121 #define BIGGEST 1
122 #define CREATOR 2
123 #define OUTSTANDING 4
124 #define PID 8
125 #define TIME 16
126
127 int
main(int argc,char ** argv)128 main(int argc, char **argv)
129 {
130 int display = SHMINFO | MSGINFO | SEMINFO;
131 int option = 0;
132 char *core, *namelist;
133 char *user, *grp;
134 int i;
135 uid_t useruid = 0;
136 gid_t grpgid = 0;
137
138 core = namelist = NULL;
139 user = grp = NULL;
140
141 while ((i = getopt(argc, argv, "MmQqSsabC:cN:ou:g:ptT")) != -1)
142 switch (i) {
143 case 'M':
144 display = SHMTOTAL;
145 break;
146 case 'm':
147 display = SHMINFO;
148 break;
149 case 'Q':
150 display = MSGTOTAL;
151 break;
152 case 'q':
153 display = MSGINFO;
154 break;
155 case 'S':
156 display = SEMTOTAL;
157 break;
158 case 's':
159 display = SEMINFO;
160 break;
161 case 'T':
162 display = SHMTOTAL | MSGTOTAL | SEMTOTAL;
163 break;
164 case 'a':
165 option |= BIGGEST | CREATOR | OUTSTANDING | PID | TIME;
166 break;
167 case 'b':
168 option |= BIGGEST;
169 break;
170 case 'C':
171 core = optarg;
172 break;
173 case 'c':
174 option |= CREATOR;
175 break;
176 case 'N':
177 namelist = optarg;
178 break;
179 case 'o':
180 option |= OUTSTANDING;
181 break;
182 case 'p':
183 option |= PID;
184 break;
185 case 't':
186 option |= TIME;
187 break;
188 case 'u':
189 user = optarg;
190 grp = NULL;
191 useruid = user2uid(optarg);
192 break;
193 case 'g':
194 grp = optarg;
195 user = NULL;
196 grpgid = grp2gid(optarg);
197 break;
198 default:
199 usage();
200 }
201
202 /*
203 * Discard setgid privileges if not the running kernel so that bad
204 * guys can't print interesting stuff from kernel memory.
205 */
206 if (namelist != NULL || core != NULL)
207 setgid(getgid());
208
209 if ((kd = kvm_open(namelist, core, NULL, O_RDONLY, "ipcs")) == NULL)
210 exit(1);
211
212 switch (kvm_nlist(kd, symbols)) {
213 case 0:
214 break;
215 case -1:
216 errx(1, "unable to read kernel symbol table");
217 default:
218 #ifdef notdef /* they'll be told more civilly later */
219 warnx("nlist failed");
220 for (i = 0; symbols[i].n_name != NULL; i++)
221 if (symbols[i].n_value == 0)
222 warnx("symbol %s not found",
223 symbols[i].n_name);
224 #endif
225 break;
226 }
227
228 if ((display & (MSGINFO | MSGTOTAL)) &&
229 kvm_read(kd, symbols[X_MSGINFO].n_value, &msginfo, sizeof(msginfo))== sizeof(msginfo)) {
230
231 if (display & MSGTOTAL) {
232 printf("msginfo:\n");
233 printf("\tmsgmax: %6d\t(max characters in a message)\n",
234 msginfo.msgmax);
235 printf("\tmsgmni: %6d\t(# of message queues)\n",
236 msginfo.msgmni);
237 printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
238 msginfo.msgmnb);
239 printf("\tmsgtql: %6d\t(max # of messages in system)\n",
240 msginfo.msgtql);
241 printf("\tmsgssz: %6d\t(size of a message segment)\n",
242 msginfo.msgssz);
243 printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
244 msginfo.msgseg);
245 }
246 if (display & MSGINFO) {
247 struct msqid_ds *xmsqids;
248
249 kvm_read(kd, symbols[X_MSQIDS].n_value, &msqids, sizeof(msqids));
250 xmsqids = malloc(sizeof(struct msqid_ds) * msginfo.msgmni);
251 kvm_read(kd, (u_long) msqids, xmsqids, sizeof(struct msqid_ds) * msginfo.msgmni);
252
253 printf("Message Queues:\n");
254 printf("T ID KEY MODE OWNER GROUP");
255 if (option & CREATOR)
256 printf(" CREATOR CGROUP");
257 if (option & OUTSTANDING)
258 printf(" CBYTES QNUM");
259 if (option & BIGGEST)
260 printf(" QBYTES");
261 if (option & PID)
262 printf(" LSPID LRPID");
263 if (option & TIME)
264 printf(" STIME RTIME CTIME");
265 printf("\n");
266 for (i = 0; i < msginfo.msgmni; i += 1) {
267 if (xmsqids[i].msg_qbytes != 0) {
268 char stime_buf[100], rtime_buf[100],
269 ctime_buf[100];
270 struct msqid_ds *msqptr = &xmsqids[i];
271
272 if (user && useruid != msqptr->msg_perm.uid)
273 continue;
274 if (grp && grpgid != msqptr->msg_perm.gid)
275 continue;
276
277 cvt_time(msqptr->msg_stime, stime_buf);
278 cvt_time(msqptr->msg_rtime, rtime_buf);
279 cvt_time(msqptr->msg_ctime, ctime_buf);
280
281 printf("q %6d %10ld %s %8s %8s",
282 IXSEQ_TO_IPCID(i, msqptr->msg_perm),
283 (long)msqptr->msg_perm.key,
284 fmt_perm(msqptr->msg_perm.mode),
285 user_from_uid(msqptr->msg_perm.uid, 0),
286 group_from_gid(msqptr->msg_perm.gid, 0));
287
288 if (option & CREATOR)
289 printf(" %8s %8s",
290 user_from_uid(msqptr->msg_perm.cuid, 0),
291 group_from_gid(msqptr->msg_perm.cgid, 0));
292
293 if (option & OUTSTANDING)
294 printf(" %6lu %6lu",
295 msqptr->msg_cbytes,
296 msqptr->msg_qnum);
297
298 if (option & BIGGEST)
299 printf(" %6lu",
300 msqptr->msg_qbytes);
301
302 if (option & PID)
303 printf(" %6d %6d",
304 (int)msqptr->msg_lspid,
305 (int)msqptr->msg_lrpid);
306
307 if (option & TIME)
308 printf("%s %s %s",
309 stime_buf,
310 rtime_buf,
311 ctime_buf);
312
313 printf("\n");
314 }
315 }
316 printf("\n");
317 }
318 } else
319 if (display & (MSGINFO | MSGTOTAL)) {
320 fprintf(stderr,
321 "SVID messages facility not configured in the system\n");
322 }
323 if ((display & (SHMINFO | SHMTOTAL)) &&
324 kvm_read(kd, symbols[X_SHMINFO].n_value, &shminfo, sizeof(shminfo))) {
325 if (display & SHMTOTAL) {
326 printf("shminfo:\n");
327 printf("\tshmmax: %12ld\t(max shared memory segment size)\n",
328 shminfo.shmmax);
329 printf("\tshmmin: %12ld\t(min shared memory segment size)\n",
330 shminfo.shmmin);
331 printf("\tshmmni: %12ld\t(max number of shared memory identifiers)\n",
332 shminfo.shmmni);
333 printf("\tshmseg: %12ld\t(max shared memory segments per process)\n",
334 shminfo.shmseg);
335 printf("\tshmall: %12ld\t(max amount of shared memory in pages)\n\n",
336 shminfo.shmall);
337 }
338 if (display & SHMINFO) {
339 struct shmid_ds *xshmids;
340
341 kvm_read(kd, symbols[X_SHMSEGS].n_value, &shmsegs, sizeof(shmsegs));
342 xshmids = malloc(sizeof(struct shmid_ds) * shminfo.shmmni);
343 kvm_read(kd, (u_long) shmsegs, xshmids, sizeof(struct shmid_ds) *
344 shminfo.shmmni);
345
346 printf("Shared Memory:\n");
347 printf("T ID KEY MODE OWNER GROUP");
348 if (option & CREATOR)
349 printf(" CREATOR CGROUP");
350 if (option & OUTSTANDING)
351 printf(" NATTCH");
352 if (option & BIGGEST)
353 printf(" SEGSZ");
354 if (option & PID)
355 printf(" CPID LPID");
356 if (option & TIME)
357 printf(" ATIME DTIME CTIME");
358 printf("\n");
359 for (i = 0; i < shminfo.shmmni; i += 1) {
360 if (xshmids[i].shm_perm.mode & 0x0800) {
361 char atime_buf[100], dtime_buf[100],
362 ctime_buf[100];
363 struct shmid_ds *shmptr = &xshmids[i];
364
365 if (user && useruid != shmptr->shm_perm.uid)
366 continue;
367
368 if (grp && grpgid != shmptr->shm_perm.gid)
369 continue;
370
371 cvt_time(shmptr->shm_atime, atime_buf);
372 cvt_time(shmptr->shm_dtime, dtime_buf);
373 cvt_time(shmptr->shm_ctime, ctime_buf);
374
375 printf("m %6d %10ld %s %8s %8s",
376 IXSEQ_TO_IPCID(i, shmptr->shm_perm),
377 (long)shmptr->shm_perm.key,
378 fmt_perm(shmptr->shm_perm.mode),
379 user_from_uid(shmptr->shm_perm.uid, 0),
380 group_from_gid(shmptr->shm_perm.gid, 0));
381
382 if (option & CREATOR)
383 printf(" %8s %8s",
384 user_from_uid(shmptr->shm_perm.cuid, 0),
385 group_from_gid(shmptr->shm_perm.cgid, 0));
386
387 if (option & OUTSTANDING)
388 printf(" %6d",
389 shmptr->shm_nattch);
390
391 if (option & BIGGEST)
392 printf(" %13zu",
393 shmptr->shm_segsz);
394
395 if (option & PID)
396 printf(" %6d %6d",
397 shmptr->shm_cpid,
398 shmptr->shm_lpid);
399
400 if (option & TIME)
401 printf(" %s %s %s",
402 atime_buf,
403 dtime_buf,
404 ctime_buf);
405
406 printf("\n");
407 }
408 }
409 printf("\n");
410 }
411 } else
412 if (display & (SHMINFO | SHMTOTAL)) {
413 fprintf(stderr,
414 "SVID shared memory facility not configured in the system\n");
415 }
416 if ((display & (SEMINFO | SEMTOTAL)) &&
417 kvm_read(kd, symbols[X_SEMINFO].n_value, &seminfo, sizeof(seminfo))) {
418 struct semid_pool *xsema;
419
420 if (display & SEMTOTAL) {
421 printf("seminfo:\n");
422 printf("\tsemmap: %6d\t(# of entries in semaphore map)\n",
423 seminfo.semmap);
424 printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
425 seminfo.semmni);
426 printf("\tsemmns: %6d\t(# of semaphores in system)\n",
427 seminfo.semmns);
428 printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
429 seminfo.semmnu);
430 printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
431 seminfo.semmsl);
432 printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
433 seminfo.semopm);
434 printf("\tsemume: %6d\t(max # of undo entries per process)\n",
435 seminfo.semume);
436 printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
437 seminfo.semusz);
438 printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
439 seminfo.semvmx);
440 printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
441 seminfo.semaem);
442 }
443 if (display & SEMINFO) {
444 kvm_read(kd, symbols[X_SEMA].n_value, &sema, sizeof(sema));
445 xsema = malloc(sizeof(struct semid_pool) * seminfo.semmni);
446 kvm_read(kd, (u_long) sema, xsema, sizeof(struct semid_pool) * seminfo.semmni);
447
448 printf("Semaphores:\n");
449 printf("T ID KEY MODE OWNER GROUP");
450 if (option & CREATOR)
451 printf(" CREATOR CGROUP");
452 if (option & BIGGEST)
453 printf(" NSEMS");
454 if (option & TIME)
455 printf(" OTIME CTIME");
456 printf("\n");
457 for (i = 0; i < seminfo.semmni; i += 1) {
458 if ((xsema[i].ds.sem_perm.mode & SEM_ALLOC) != 0) {
459 char ctime_buf[100], otime_buf[100];
460 struct semid_ds *semaptr = &xsema[i].ds;
461
462 if (user && useruid != semaptr->sem_perm.uid)
463 continue;
464
465 if (grp && grpgid != semaptr->sem_perm.gid)
466 continue;
467
468 cvt_time(semaptr->sem_otime, otime_buf);
469 cvt_time(semaptr->sem_ctime, ctime_buf);
470
471 printf("s %6d %10ld %s %8s %8s",
472 IXSEQ_TO_IPCID(i, semaptr->sem_perm),
473 (long)semaptr->sem_perm.key,
474 fmt_perm(semaptr->sem_perm.mode),
475 user_from_uid(semaptr->sem_perm.uid, 0),
476 group_from_gid(semaptr->sem_perm.gid, 0));
477
478 if (option & CREATOR)
479 printf(" %8s %8s",
480 user_from_uid(semaptr->sem_perm.cuid, 0),
481 group_from_gid(semaptr->sem_perm.cgid, 0));
482
483 if (option & BIGGEST)
484 printf(" %5d",
485 semaptr->sem_nsems);
486
487 if (option & TIME)
488 printf(" %s %s",
489 otime_buf,
490 ctime_buf);
491
492 printf("\n");
493 }
494 }
495
496 printf("\n");
497 }
498 } else
499 if (display & (SEMINFO | SEMTOTAL)) {
500 fprintf(stderr, "SVID semaphores facility not configured in the system\n");
501 }
502 kvm_close(kd);
503
504 exit(0);
505 }
506
507 static uid_t
user2uid(const char * username)508 user2uid(const char *username)
509 {
510 struct passwd *pwd;
511 uid_t uid;
512 char *r;
513
514 uid = strtoul(username, &r, 0);
515 if (!*r && r != username)
516 return (uid);
517 if ((pwd = getpwnam(username)) == NULL)
518 errx(1, "No such user");
519 endpwent();
520 return (pwd->pw_uid);
521 }
522
523 static gid_t
grp2gid(const char * groupname)524 grp2gid(const char *groupname)
525 {
526 struct group *grp;
527 gid_t gid;
528 char *r;
529
530 gid = strtol(groupname, &r, 0);
531 if (!*r && r != groupname)
532 return (gid);
533 if ((grp = getgrnam(groupname)) == NULL)
534 errx(1, "No such group");
535 endgrent();
536 return (grp->gr_gid);
537 }
538
539 static void
usage(void)540 usage(void)
541 {
542
543 fprintf(stderr,
544 "usage: ipcs [-abcmopqstMQST] [-C corefile] [-N namelist] [-u user] [-g group]\n");
545 exit(1);
546 }
547