Bug Summary

File:src/usr.bin/ipcs/ipcs.c
Warning:line 751, column 4
Potential leak of memory pointed to by 'msqptr'

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd7.0 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name ipcs.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -tune-cpu generic -debugger-tuning=gdb -fcoverage-compilation-dir=/usr/src/usr.bin/ipcs/obj -resource-dir /usr/local/lib/clang/13.0.0 -internal-isystem /usr/local/lib/clang/13.0.0/include -internal-externc-isystem /usr/include -O2 -fdebug-compilation-dir=/usr/src/usr.bin/ipcs/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /home/ben/Projects/vmm/scan-build/2022-01-12-194120-40624-1 -x c /usr/src/usr.bin/ipcs/ipcs.c
1/* $OpenBSD: ipcs.c,v 1.27 2019/06/28 13:35:01 deraadt Exp $ */
2/* $NetBSD: ipcs.c,v 1.25 2000/06/16 03:58:20 simonb Exp $ */
3
4/*-
5 * Copyright (c) 2000 The NetBSD Foundation, Inc.
6 * All rights reserved.
7 *
8 * This code is derived from software contributed to The NetBSD Foundation
9 * by Simon Burge.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 * POSSIBILITY OF SUCH DAMAGE.
31 */
32
33/*
34 * Copyright (c) 1994 SigmaSoft, Th. Lockert <tholo@sigmasoft.com>
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 *
46 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
47 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
48 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
49 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
50 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
51 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
52 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
53 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
54 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
55 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
56 */
57
58#include <sys/types.h>
59#include <sys/sysctl.h>
60#define _KERNEL /* XXX */
61#include <sys/ipc.h>
62#include <sys/sem.h>
63#include <sys/shm.h>
64#include <sys/msg.h>
65#undef _KERNEL
66
67#include <err.h>
68#include <fcntl.h>
69#include <grp.h>
70#include <kvm.h>
71#include <limits.h>
72#include <nlist.h>
73#include <paths.h>
74#include <pwd.h>
75#include <stdio.h>
76#include <stdlib.h>
77#include <string.h>
78#include <time.h>
79#include <unistd.h>
80
81void cvt_time(time_t, char *, size_t);
82char *fmt_perm(mode_t);
83void ipcs_kvm(void);
84int main(int, char **);
85void msg_sysctl(void);
86void sem_sysctl(void);
87void shm_sysctl(void);
88void show_msginfo(time_t, time_t, time_t, int, key_t, mode_t, uid_t,
89 gid_t, uid_t, gid_t, u_long, u_long, u_long, pid_t, pid_t);
90void show_msginfo_hdr(void);
91void show_msgtotal(struct msginfo *);
92void show_seminfo_hdr(void);
93void show_seminfo(time_t, time_t, int, key_t, mode_t, uid_t, gid_t,
94 uid_t, gid_t, int16_t);
95void show_semtotal(struct seminfo *);
96void show_shminfo(time_t, time_t, time_t, int, key_t, mode_t, uid_t,
97 gid_t, uid_t, gid_t, u_int32_t, int, pid_t, pid_t);
98void show_shminfo_hdr(void);
99void show_shmtotal(struct shminfo *);
100__dead__attribute__((__noreturn__)) void usage(void);
101
102char *
103fmt_perm(mode_t mode)
104{
105 static char buffer[12];
106
107 buffer[0] = '-';
108 buffer[1] = '-';
109 buffer[2] = ((mode & 0400) ? 'r' : '-');
110 buffer[3] = ((mode & 0200) ? 'w' : '-');
111 buffer[4] = ((mode & 0100) ? 'a' : '-');
112 buffer[5] = ((mode & 0040) ? 'r' : '-');
113 buffer[6] = ((mode & 0020) ? 'w' : '-');
114 buffer[7] = ((mode & 0010) ? 'a' : '-');
115 buffer[8] = ((mode & 0004) ? 'r' : '-');
116 buffer[9] = ((mode & 0002) ? 'w' : '-');
117 buffer[10] = ((mode & 0001) ? 'a' : '-');
118 buffer[11] = '\0';
119 return (&buffer[0]);
120}
121
122void
123cvt_time(time_t t, char *buf, size_t buflen)
124{
125 struct tm *tm;
126
127 if (t == 0)
128 (void)strlcpy(buf, "no-entry", buflen);
129 else {
130 tm = localtime(&t);
131 (void)snprintf(buf, buflen, "%2d:%02d:%02d",
132 tm->tm_hour, tm->tm_min, tm->tm_sec);
133 }
134}
135#define SHMINFO1 1
136#define SHMTOTAL2 2
137#define MSGINFO4 4
138#define MSGTOTAL8 8
139#define SEMINFO16 16
140#define SEMTOTAL32 32
141
142#define BIGGEST1 1
143#define CREATOR2 2
144#define OUTSTANDING4 4
145#define PID8 8
146#define TIME16 16
147
148char *core = NULL((void *)0), *namelist = NULL((void *)0);
149int display = SHMINFO1 | MSGINFO4 | SEMINFO16;
150int option = 0;
151
152int
153main(int argc, char **argv)
154{
155 int ch;
156
157 while ((ch = getopt(argc, argv, "MmQqSsabC:cN:optT")) != -1)
1
Assuming the condition is true
→
2
←
Loop condition is true. Entering loop body
→
5
←
Assuming the condition is false
→
6
←
Loop condition is false. Execution continues on line 208
→
158 switch (ch) {
3
←
Control jumps to 'case 78:' at line 192
→
159 case 'M':
160 display = SHMTOTAL2;
161 break;
162 case 'm':
163 display = SHMINFO1;
164 break;
165 case 'Q':
166 display = MSGTOTAL8;
167 break;
168 case 'q':
169 display = MSGINFO4;
170 break;
171 case 'S':
172 display = SEMTOTAL32;
173 break;
174 case 's':
175 display = SEMINFO16;
176 break;
177 case 'T':
178 display = SHMTOTAL2 | MSGTOTAL8 | SEMTOTAL32;
179 break;
180 case 'a':
181 option |= BIGGEST1 | CREATOR2 | OUTSTANDING4 | PID8 | TIME16;
182 break;
183 case 'b':
184 option |= BIGGEST1;
185 break;
186 case 'C':
187 core = optarg;
188 break;
189 case 'c':
190 option |= CREATOR2;
191 break;
192 case 'N':
193 namelist = optarg;
194 break;
4
←
 Execution continues on line 157
→
195 case 'o':
196 option |= OUTSTANDING4;
197 break;
198 case 'p':
199 option |= PID8;
200 break;
201 case 't':
202 option |= TIME16;
203 break;
204 default:
205 usage();
206 }
207
208 if (argc - optind > 0)
7
←
Assuming the condition is false
→
8
←
Taking false branch
→
209 usage();
210
211 if (namelist == NULL((void *)0) && core == NULL((void *)0)) {
9
←
Assuming 'namelist' is not equal to NULL
→
212 if (display & (MSGINFO4 | MSGTOTAL8))
213 msg_sysctl();
214 if (display & (SHMINFO1 | SHMTOTAL2))
215 shm_sysctl();
216 if (display & (SEMINFO16 | SEMTOTAL32))
217 sem_sysctl();
218 } else
219 ipcs_kvm();
10
←
Calling 'ipcs_kvm'
→
220
221 exit(0);
222}
223
224void
225show_msgtotal(struct msginfo *msginfo)
226{
227
228 printf("msginfo:\n");
229 printf("\tmsgmax: %6d\t(max characters in a message)\n",
230 msginfo->msgmax);
231 printf("\tmsgmni: %6d\t(# of message queues)\n",
232 msginfo->msgmni);
233 printf("\tmsgmnb: %6d\t(max characters in a message queue)\n",
234 msginfo->msgmnb);
235 printf("\tmsgtql: %6d\t(max # of messages in system)\n",
236 msginfo->msgtql);
237 printf("\tmsgssz: %6d\t(size of a message segment)\n",
238 msginfo->msgssz);
239 printf("\tmsgseg: %6d\t(# of message segments in system)\n\n",
240 msginfo->msgseg);
241}
242
243void
244show_shmtotal(struct shminfo *shminfo)
245{
246
247 printf("shminfo:\n");
248 printf("\tshmmax: %7d\t(max shared memory segment size)\n",
249 shminfo->shmmax);
250 printf("\tshmmin: %7d\t(min shared memory segment size)\n",
251 shminfo->shmmin);
252 printf("\tshmmni: %7d\t(max number of shared memory identifiers)\n",
253 shminfo->shmmni);
254 printf("\tshmseg: %7d\t(max shared memory segments per process)\n",
255 shminfo->shmseg);
256 printf("\tshmall: %7d\t(max amount of shared memory in pages)\n\n",
257 shminfo->shmall);
258}
259
260void
261show_semtotal(struct seminfo *seminfo)
262{
263
264 printf("seminfo:\n");
265 printf("\tsemmni: %6d\t(# of semaphore identifiers)\n",
266 seminfo->semmni);
267 printf("\tsemmns: %6d\t(# of semaphores in system)\n",
268 seminfo->semmns);
269 printf("\tsemmnu: %6d\t(# of undo structures in system)\n",
270 seminfo->semmnu);
271 printf("\tsemmsl: %6d\t(max # of semaphores per id)\n",
272 seminfo->semmsl);
273 printf("\tsemopm: %6d\t(max # of operations per semop call)\n",
274 seminfo->semopm);
275 printf("\tsemume: %6d\t(max # of undo entries per process)\n",
276 seminfo->semume);
277 printf("\tsemusz: %6d\t(size in bytes of undo structure)\n",
278 seminfo->semusz);
279 printf("\tsemvmx: %6d\t(semaphore maximum value)\n",
280 seminfo->semvmx);
281 printf("\tsemaem: %6d\t(adjust on exit max value)\n\n",
282 seminfo->semaem);
283}
284
285void
286show_msginfo_hdr(void)
287{
288
289 printf("Message Queues:\n");
290 printf("T ID KEY MODE OWNER GROUP");
291 if (option & CREATOR2)
292 printf(" CREATOR CGROUP");
293 if (option & OUTSTANDING4)
294 printf(" CBYTES QNUM");
295 if (option & BIGGEST1)
296 printf(" QBYTES");
297 if (option & PID8)
298 printf(" LSPID LRPID");
299 if (option & TIME16)
300 printf(" STIME RTIME CTIME");
301 printf("\n");
302}
303
304void
305show_msginfo(time_t stime, time_t rtime, time_t ctime, int ipcid, key_t key,
306 mode_t mode, uid_t uid, gid_t gid, uid_t cuid, gid_t cgid,
307 u_long cbytes, u_long qnum, u_long qbytes, pid_t lspid,
308 pid_t lrpid)
309{
310 char stime_buf[100], rtime_buf[100], ctime_buf[100];
311
312 if (option & TIME16) {
313 cvt_time(stime, stime_buf, sizeof(stime_buf));
314 cvt_time(rtime, rtime_buf, sizeof(rtime_buf));
315 cvt_time(ctime, ctime_buf, sizeof(ctime_buf));
316 }
317
318 printf("q %8d %10ld %s %8s %8s", ipcid, key, fmt_perm(mode),
319 user_from_uid(uid, 0), group_from_gid(gid, 0));
320
321 if (option & CREATOR2)
322 printf(" %8s %8s", user_from_uid(cuid, 0),
323 group_from_gid(cgid, 0));
324
325 if (option & OUTSTANDING4)
326 printf(" %6lu %5lu", cbytes, qnum);
327
328 if (option & BIGGEST1)
329 printf(" %6lu", qbytes);
330
331 if (option & PID8)
332 printf(" %5ld %5ld", (long)lspid, (long)lrpid);
333
334 if (option & TIME16)
335 printf(" %s %s %s", stime_buf, rtime_buf, ctime_buf);
336
337 printf("\n");
338}
339
340void
341show_shminfo_hdr(void)
342{
343
344 printf("Shared Memory:\n");
345 printf("T ID KEY MODE OWNER GROUP");
346 if (option & CREATOR2)
347 printf(" CREATOR CGROUP");
348 if (option & OUTSTANDING4)
349 printf(" NATTCH");
350 if (option & BIGGEST1)
351 printf(" SEGSZ");
352 if (option & PID8)
353 printf(" CPID LPID");
354 if (option & TIME16)
355 printf(" ATIME DTIME CTIME");
356 printf("\n");
357}
358
359void
360show_shminfo(time_t atime, time_t dtime, time_t ctime, int ipcid, key_t key,
361 mode_t mode, uid_t uid, gid_t gid, uid_t cuid, gid_t cgid,
362 u_int32_t nattch, int segsz, pid_t cpid, pid_t lpid)
363{
364 char atime_buf[100], dtime_buf[100], ctime_buf[100];
365
366 if (option & TIME16) {
367 cvt_time(atime, atime_buf, sizeof(atime_buf));
368 cvt_time(dtime, dtime_buf, sizeof(dtime_buf));
369 cvt_time(ctime, ctime_buf, sizeof(ctime_buf));
370 }
371
372 printf("m %8d %10ld %s %8s %8s", ipcid, key, fmt_perm(mode),
373 user_from_uid(uid, 0), group_from_gid(gid, 0));
374
375 if (option & CREATOR2)
376 printf(" %8s %8s", user_from_uid(cuid, 0),
377 group_from_gid(cgid, 0));
378
379 if (option & OUTSTANDING4)
380 printf(" %6d", nattch);
381
382 if (option & BIGGEST1)
383 printf(" %7d", segsz);
384
385 if (option & PID8)
386 printf(" %5d %5d", cpid, lpid);
387
388 if (option & TIME16)
389 printf(" %s %s %s",
390 atime_buf,
391 dtime_buf,
392 ctime_buf);
393
394 printf("\n");
395}
396
397void
398show_seminfo_hdr(void)
399{
400
401 printf("Semaphores:\n");
402 printf("T ID KEY MODE OWNER GROUP");
403 if (option & CREATOR2)
404 printf(" CREATOR CGROUP");
405 if (option & BIGGEST1)
406 printf(" NSEMS");
407 if (option & TIME16)
408 printf(" OTIME CTIME");
409 printf("\n");
410}
411
412void
413show_seminfo(time_t otime, time_t ctime, int ipcid, key_t key, mode_t mode,
414 uid_t uid, gid_t gid, uid_t cuid, gid_t cgid, int16_t nsems)
415{
416 char ctime_buf[100], otime_buf[100];
417
418 if (option & TIME16) {
419 cvt_time(otime, otime_buf, sizeof(otime_buf));
420 cvt_time(ctime, ctime_buf, sizeof(ctime_buf));
421 }
422
423 printf("s %8d %10ld %s %8s %8s", ipcid, key, fmt_perm(mode),
424 user_from_uid(uid, 0), group_from_gid(gid, 0));
425
426 if (option & CREATOR2)
427 printf(" %8s %8s", user_from_uid(cuid, 0),
428 group_from_gid(cgid, 0));
429
430 if (option & BIGGEST1)
431 printf(" %5d", nsems);
432
433 if (option & TIME16)
434 printf(" %s %s", otime_buf, ctime_buf);
435
436 printf("\n");
437}
438
439void
440msg_sysctl(void)
441{
442 struct msg_sysctl_info *msgsi;
443 char *buf;
444 int mib[3];
445 size_t len;
446 int i, valid;
447
448 mib[0] = CTL_KERN1;
449 mib[1] = KERN_SYSVMSG34;
450 len = sizeof(valid);
451 if (sysctl(mib, 2, &valid, &len, NULL((void *)0), 0) == -1) {
452 warn("sysctl(KERN_SYSVMSG)");
453 return;
454 }
455 if (!valid) {
456 warnx("SVID messages facility not configured in the system");
457 return;
458 }
459
460 mib[0] = CTL_KERN1;
461 mib[1] = KERN_SYSVIPC_INFO51;
462 mib[2] = KERN_SYSVIPC_MSG_INFO1;
463
464 if (!(display & MSGINFO4)) {
465 /* totals only */
466 len = sizeof(struct msginfo);
467 } else {
468 if (sysctl(mib, 3, NULL((void *)0), &len, NULL((void *)0), 0) == -1) {
469 warn("sysctl(KERN_SYSVIPC_MSG_INFO)");
470 return;
471 }
472 }
473
474 if ((buf = malloc(len)) == NULL((void *)0))
475 err(1, "malloc");
476 msgsi = (struct msg_sysctl_info *)buf;
477 if (sysctl(mib, 3, msgsi, &len, NULL((void *)0), 0) == -1) {
478 warn("sysctl(KERN_SYSVIPC_MSG_INFO)");
479 return;
480 }
481
482 if (display & MSGTOTAL8)
483 show_msgtotal(&msgsi->msginfo);
484
485 if (display & MSGINFO4) {
486 show_msginfo_hdr();
487 for (i = 0; i < msgsi->msginfo.msgmni; i++) {
488 struct msqid_ds *msqptr = &msgsi->msgids[i];
489 if (msqptr->msg_qbytes != 0)
490 show_msginfo(msqptr->msg_stime,
491 msqptr->msg_rtime,
492 msqptr->msg_ctime,
493 IXSEQ_TO_IPCID(i, msqptr->msg_perm)(((msqptr->msg_perm.seq) << 16) | (i & 0xffff)),
494 msqptr->msg_perm.key,
495 msqptr->msg_perm.mode,
496 msqptr->msg_perm.uid,
497 msqptr->msg_perm.gid,
498 msqptr->msg_perm.cuid,
499 msqptr->msg_perm.cgid,
500 msqptr->msg_cbytes,
501 msqptr->msg_qnum,
502 msqptr->msg_qbytes,
503 msqptr->msg_lspid,
504 msqptr->msg_lrpid);
505 }
506 printf("\n");
507 }
508}
509
510void
511shm_sysctl(void)
512{
513 struct shm_sysctl_info *shmsi;
514 char *buf;
515 int mib[3];
516 size_t len;
517 int i, valid;
518
519 mib[0] = CTL_KERN1;
520 mib[1] = KERN_SYSVSHM36;
521 len = sizeof(valid);
522 if (sysctl(mib, 2, &valid, &len, NULL((void *)0), 0) == -1) {
523 warn("sysctl(KERN_SYSVSHM)");
524 return;
525 }
526 if (!valid) {
527 warnx("SVID shared memory facility not configured in "
528 "the system");
529 return;
530 }
531
532 mib[0] = CTL_KERN1;
533 mib[1] = KERN_SYSVIPC_INFO51;
534 mib[2] = KERN_SYSVIPC_SHM_INFO3;
535
536 if (!(display & SHMINFO1)) {
537 /* totals only */
538 len = sizeof(struct shminfo);
539 } else {
540 if (sysctl(mib, 3, NULL((void *)0), &len, NULL((void *)0), 0) == -1) {
541 warn("sysctl(KERN_SYSVIPC_SHM_INFO)");
542 return;
543 }
544 }
545
546 if ((buf = malloc(len)) == NULL((void *)0))
547 err(1, "malloc");
548 shmsi = (struct shm_sysctl_info *)buf;
549 if (sysctl(mib, 3, shmsi, &len, NULL((void *)0), 0) == -1) {
550 warn("sysctl(KERN_SYSVIPC_SHM_INFO)");
551 return;
552 }
553
554 if (display & SHMTOTAL2)
555 show_shmtotal(&shmsi->shminfo);
556
557 if (display & SHMINFO1) {
558 show_shminfo_hdr();
559 for (i = 0; i < shmsi->shminfo.shmmni; i++) {
560 struct shmid_ds *shmptr = &shmsi->shmids[i];
561 if (shmptr->shm_internal)
562 show_shminfo(shmptr->shm_atime,
563 shmptr->shm_dtime,
564 shmptr->shm_ctime,
565 IXSEQ_TO_IPCID(i, shmptr->shm_perm)(((shmptr->shm_perm.seq) << 16) | (i & 0xffff)),
566 shmptr->shm_perm.key,
567 shmptr->shm_perm.mode,
568 shmptr->shm_perm.uid,
569 shmptr->shm_perm.gid,
570 shmptr->shm_perm.cuid,
571 shmptr->shm_perm.cgid,
572 shmptr->shm_nattch,
573 shmptr->shm_segsz,
574 shmptr->shm_cpid,
575 shmptr->shm_lpid);
576 }
577 printf("\n");
578 }
579}
580
581void
582sem_sysctl(void)
583{
584 struct sem_sysctl_info *semsi;
585 char *buf;
586 int mib[3];
587 size_t len;
588 int i, valid;
589
590 mib[0] = CTL_KERN1;
591 mib[1] = KERN_SYSVSEM35;
592 len = sizeof(valid);
593 if (sysctl(mib, 2, &valid, &len, NULL((void *)0), 0) == -1) {
594 warn("sysctl(KERN_SYSVSEM)");
595 return;
596 }
597 if (!valid) {
598 warnx("SVID shared memory facility not configured in "
599 "the system");
600 return;
601 }
602
603 mib[0] = CTL_KERN1;
604 mib[1] = KERN_SYSVIPC_INFO51;
605 mib[2] = KERN_SYSVIPC_SEM_INFO2;
606
607 if (!(display & SEMINFO16)) {
608 /* totals only */
609 len = sizeof(struct seminfo);
610 } else {
611 if (sysctl(mib, 3, NULL((void *)0), &len, NULL((void *)0), 0) == -1) {
612 warn("sysctl(KERN_SYSVIPC_SEM_INFO)");
613 return;
614 }
615 }
616
617 if ((buf = malloc(len)) == NULL((void *)0))
618 err(1, "malloc");
619 semsi = (struct sem_sysctl_info *)buf;
620 if (sysctl(mib, 3, semsi, &len, NULL((void *)0), 0) == -1) {
621 warn("sysctl(KERN_SYSVIPC_SEM_INFO)");
622 return;
623 }
624
625 if (display & SEMTOTAL32)
626 show_semtotal(&semsi->seminfo);
627
628 if (display & SEMINFO16) {
629 show_seminfo_hdr();
630 for (i = 0; i < semsi->seminfo.semmni; i++) {
631 struct semid_ds *semaptr = &semsi->semids[i];
632
633 if (semaptr->sem_base != NULL((void *)0))
634 show_seminfo(semaptr->sem_otime,
635 semaptr->sem_ctime,
636 IXSEQ_TO_IPCID(i, semaptr->sem_perm)(((semaptr->sem_perm.seq) << 16) | (i & 0xffff)),
637 semaptr->sem_perm.key,
638 semaptr->sem_perm.mode,
639 semaptr->sem_perm.uid,
640 semaptr->sem_perm.gid,
641 semaptr->sem_perm.cuid,
642 semaptr->sem_perm.cgid,
643 semaptr->sem_nsems);
644 }
645 printf("\n");
646 }
647}
648
649void
650ipcs_kvm(void)
651{
652 struct msginfo msginfo;
653 struct que msgque;
654 struct msqid_ds *msqids;
655 struct seminfo seminfo;
656 struct semid_ds sem, **sema;
657 struct shminfo shminfo;
658 struct shmid_ds shmseg, **shmsegs;
659 char errbuf[_POSIX2_LINE_MAX2048];
660 u_long addr;
661 kvm_t *kd;
662 int i;
663 struct nlist symbols[] = {
664 {"_sema"},
665 #define X_SEMA0 0
666 {"_seminfo"},
667 #define X_SEMINFO1 1
668 {"_semu"},
669 #define X_SEMU2 2
670 {"_msginfo"},
671 #define X_MSGINFO3 3
672 {"_msg_queues"},
673 #define X_MSG_QUEUES4 4
674 {"_shminfo"},
675 #define X_SHMINFO5 5
676 {"_shmsegs"},
677 #define X_SHMSEGS6 6
678 {NULL((void *)0)}
679 };
680
681 if ((kd = kvm_openfiles(namelist, core, NULL((void *)0), O_RDONLY0x0000,
11
←
Assuming the condition is false
→
12
←
Taking false branch
→
682 errbuf)) == NULL((void *)0))
683 errx(1, "can't open kvm: %s", errbuf);
684
685 switch (kvm_nlist(kd, symbols)) {
13
←
Control jumps to the 'default' case at line 692
→
686 case 0:
687 break;
688 case -1:
689 errx(1, "%s: unable to read symbol table.",
690 namelist == NULL((void *)0) ? _PATH_UNIX"/bsd" : namelist);
691 /* NOTREACHED */
692 default:
693#ifdef notdef /* they'll be told more civilly later */
694 warnx("nlist failed");
695 for (i = 0; symbols[i].n_name != NULL((void *)0); i++)
696 if (symbols[i].n_value == 0)
697 warnx("symbol %s not found", symbols[i].n_name);
698#endif
699 break;
14
←
 Execution continues on line 702
→
700 }
701
702 if ((display & (MSGINFO4 | MSGTOTAL8)) &&
16
←
Taking true branch
→
703 (kvm_read(kd, symbols[X_MSGINFO3].n_value,
15
←
Assuming the condition is true
→
704 &msginfo, sizeof(msginfo)) == sizeof(msginfo))) {
705
706 if (display & MSGTOTAL8)
17
←
Taking false branch
→
707 show_msgtotal(&msginfo);
708
709 if (display & MSGINFO4) {
18
←
Taking true branch
→
710 if (kvm_read(kd, symbols[X_MSG_QUEUES4].n_value,
19
←
Assuming the condition is false
→
20
←
Taking false branch
→
711 &addr, sizeof(addr)) != sizeof(addr))
712 errx(1, "kvm_read (%s): %s",
713 symbols[X_MSG_QUEUES4].n_name,
714 kvm_geterr(kd));
715
716 msqids = calloc(sizeof(struct msqid_ds),
21
←
Memory is allocated
→
717 msginfo.msgmni);
718 if (msqids == NULL((void *)0))
22
←
Assuming 'msqids' is not equal to NULL
→
23
←
Taking false branch
→
719 err(1, "calloc");
720
721 /* walk the TAILQ */
722 while (addr != 0) {
24
←
Assuming 'addr' is equal to 0
→
25
←
Loop condition is false. Execution continues on line 731
→
723 if (kvm_read(kd, addr, &msgque, sizeof(msgque))
724 != sizeof(msgque))
725 errx(1, "kvm_read (%s): %s",
726 "msg que", kvm_geterr(kd));
727 msqids[msgque.que_ix] = msgque.msqid_ds;
728 addr = (u_long)TAILQ_NEXT(&msgque, que_next)((&msgque)->que_next.tqe_next);
729 }
730
731 show_msginfo_hdr();
732 for (i = 0; i < msginfo.msgmni; i++) {
26
←
Assuming 'i' is < field 'msgmni'
→
27
←
Loop condition is true. Entering loop body
→
29
←
Assuming 'i' is >= field 'msgmni'
→
30
←
Loop condition is false. Execution continues on line 751
→
733 struct msqid_ds *msqptr = &msqids[i];
734 if (msqptr->msg_qbytes
27.1
Field 'msg_qbytes' is equal to 0
 != 0)
28
←
Taking false branch
→
735 show_msginfo(msqptr->msg_stime,
736 msqptr->msg_rtime,
737 msqptr->msg_ctime,
738 IXSEQ_TO_IPCID(i, msqptr->msg_perm)(((msqptr->msg_perm.seq) << 16) | (i & 0xffff)),
739 msqptr->msg_perm.key,
740 msqptr->msg_perm.mode,
741 msqptr->msg_perm.uid,
742 msqptr->msg_perm.gid,
743 msqptr->msg_perm.cuid,
744 msqptr->msg_perm.cgid,
745 msqptr->msg_cbytes,
746 msqptr->msg_qnum,
747 msqptr->msg_qbytes,
748 msqptr->msg_lspid,
749 msqptr->msg_lrpid);
750 }
751 printf("\n");
31
←
Potential leak of memory pointed to by 'msqptr'
752 }
753 } else {
754 if (display & (MSGINFO4 | MSGTOTAL8)) {
755 warnx("SVID messages facility not configured in "
756 "the system");
757 }
758 }
759 if ((display & (SHMINFO1 | SHMTOTAL2)) &&
760 (kvm_read(kd, symbols[X_SHMINFO5].n_value, &shminfo,
761 sizeof(shminfo)) == sizeof(shminfo))) {
762
763 if (display & SHMTOTAL2)
764 show_shmtotal(&shminfo);
765
766 if (display & SHMINFO1) {
767 if (kvm_read(kd, symbols[X_SHMSEGS6].n_value, &addr,
768 sizeof(addr)) != sizeof(addr))
769 errx(1, "kvm_read (%s): %s",
770 symbols[X_SHMSEGS6].n_name, kvm_geterr(kd));
771
772 shmsegs = calloc(sizeof(struct shmid_ds *),
773 shminfo.shmmni);
774 if (shmsegs == NULL((void *)0))
775 err(1, "calloc");
776
777 if (kvm_read(kd, addr, shmsegs,
778 sizeof(struct shmid_ds *) * shminfo.shmmni) !=
779 sizeof(struct shmid_ds *) * shminfo.shmmni)
780 errx(1, "kvm_read (shmsegs): %s",
781 kvm_geterr(kd));
782
783 show_shminfo_hdr();
784 for (i = 0; i < shminfo.shmmni; i++) {
785 if (shmsegs[i] == NULL((void *)0))
786 continue;
787
788 if (kvm_read(kd, (u_long)shmsegs[i], &shmseg,
789 sizeof(shmseg)) != sizeof(shmseg))
790 errx(1, "kvm_read (shmseg): %s",
791 kvm_geterr(kd));
792 show_shminfo(shmseg.shm_atime,
793 shmseg.shm_dtime,
794 shmseg.shm_ctime,
795 IXSEQ_TO_IPCID(i, shmseg.shm_perm)(((shmseg.shm_perm.seq) << 16) | (i & 0xffff)),
796 shmseg.shm_perm.key,
797 shmseg.shm_perm.mode,
798 shmseg.shm_perm.uid,
799 shmseg.shm_perm.gid,
800 shmseg.shm_perm.cuid,
801 shmseg.shm_perm.cgid,
802 shmseg.shm_nattch,
803 shmseg.shm_segsz,
804 shmseg.shm_cpid,
805 shmseg.shm_lpid);
806 }
807 printf("\n");
808 }
809 } else
810 if (display & (SHMINFO1 | SHMTOTAL2)) {
811 warnx("SVID shared memory facility not configured in "
812 "the system");
813 }
814 if ((display & (SEMINFO16 | SEMTOTAL32)) &&
815 (kvm_read(kd, symbols[X_SEMINFO1].n_value, &seminfo,
816 sizeof(seminfo)) == sizeof(seminfo))) {
817 if (display & SEMTOTAL32)
818 show_semtotal(&seminfo);
819
820 if (display & SEMINFO16) {
821 if (kvm_read(kd, symbols[X_SEMA0].n_value, &addr,
822 sizeof(addr)) != sizeof(addr))
823 errx(1, "kvm_read (%s): %s",
824 symbols[X_SEMA0].n_name, kvm_geterr(kd));
825
826 sema = calloc(sizeof(struct semid_ds *),
827 seminfo.semmni);
828 if (sema == NULL((void *)0))
829 err(1, "calloc");
830
831 if (kvm_read(kd, addr, sema,
832 sizeof(struct semid_ds *) * seminfo.semmni) !=
833 sizeof(struct semid_ds *) * seminfo.semmni)
834 errx(1, "kvm_read (sema): %s",
835 kvm_geterr(kd));
836
837 show_seminfo_hdr();
838 for (i = 0; i < seminfo.semmni; i++) {
839 if (sema[i] == NULL((void *)0))
840 continue;
841
842 if (kvm_read(kd, (u_long)sema[i], &sem,
843 sizeof(sem)) != sizeof(sem))
844 errx(1, "kvm_read (sem): %s",
845 kvm_geterr(kd));
846 show_seminfo(sem.sem_otime,
847 sem.sem_ctime,
848 IXSEQ_TO_IPCID(i, sem.sem_perm)(((sem.sem_perm.seq) << 16) | (i & 0xffff)),
849 sem.sem_perm.key,
850 sem.sem_perm.mode,
851 sem.sem_perm.uid,
852 sem.sem_perm.gid,
853 sem.sem_perm.cuid,
854 sem.sem_perm.cgid,
855 sem.sem_nsems);
856 }
857 printf("\n");
858 }
859 } else
860 if (display & (SEMINFO16 | SEMTOTAL32)) {
861 warnx("SVID semaphores facility not configured in "
862 "the system");
863 }
864 kvm_close(kd);
865}
866
867void
868usage(void)
869{
870 extern char *__progname;
871
872 fprintf(stderr(&__sF[2]),
873 "usage: %s [-abcMmopQqSsTt] [-C core] [-N system]\n",
874 __progname);
875 exit(1);
876}