FreeBSD/Linux Kernel Cross Reference
sys/kern/kern_proc.c
1 /*-
2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD: releng/8.3/sys/kern/kern_proc.c 225080 2011-08-22 18:41:39Z jhb $");
34
35 #include "opt_compat.h"
36 #include "opt_ddb.h"
37 #include "opt_kdtrace.h"
38 #include "opt_ktrace.h"
39 #include "opt_kstack_pages.h"
40 #include "opt_stack.h"
41
42 #include <sys/param.h>
43 #include <sys/systm.h>
44 #include <sys/kernel.h>
45 #include <sys/limits.h>
46 #include <sys/lock.h>
47 #include <sys/malloc.h>
48 #include <sys/mount.h>
49 #include <sys/mutex.h>
50 #include <sys/proc.h>
51 #include <sys/refcount.h>
52 #include <sys/sbuf.h>
53 #include <sys/sysent.h>
54 #include <sys/sched.h>
55 #include <sys/smp.h>
56 #include <sys/stack.h>
57 #include <sys/sysctl.h>
58 #include <sys/filedesc.h>
59 #include <sys/tty.h>
60 #include <sys/signalvar.h>
61 #include <sys/sdt.h>
62 #include <sys/sx.h>
63 #include <sys/user.h>
64 #include <sys/jail.h>
65 #include <sys/vnode.h>
66 #include <sys/eventhandler.h>
67
68 #ifdef DDB
69 #include <ddb/ddb.h>
70 #endif
71
72 #include <vm/vm.h>
73 #include <vm/vm_extern.h>
74 #include <vm/pmap.h>
75 #include <vm/vm_map.h>
76 #include <vm/vm_object.h>
77 #include <vm/uma.h>
78
79 #ifdef COMPAT_FREEBSD32
80 #include <compat/freebsd32/freebsd32.h>
81 #include <compat/freebsd32/freebsd32_util.h>
82 #endif
83
84 SDT_PROVIDER_DEFINE(proc);
85 SDT_PROBE_DEFINE(proc, kernel, ctor, entry, entry);
86 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 0, "struct proc *");
87 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 1, "int");
88 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 2, "void *");
89 SDT_PROBE_ARGTYPE(proc, kernel, ctor, entry, 3, "int");
90 SDT_PROBE_DEFINE(proc, kernel, ctor, return, return);
91 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 0, "struct proc *");
92 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 1, "int");
93 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 2, "void *");
94 SDT_PROBE_ARGTYPE(proc, kernel, ctor, return, 3, "int");
95 SDT_PROBE_DEFINE(proc, kernel, dtor, entry, entry);
96 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 0, "struct proc *");
97 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 1, "int");
98 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 2, "void *");
99 SDT_PROBE_ARGTYPE(proc, kernel, dtor, entry, 3, "struct thread *");
100 SDT_PROBE_DEFINE(proc, kernel, dtor, return, return);
101 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 0, "struct proc *");
102 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 1, "int");
103 SDT_PROBE_ARGTYPE(proc, kernel, dtor, return, 2, "void *");
104 SDT_PROBE_DEFINE(proc, kernel, init, entry, entry);
105 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 0, "struct proc *");
106 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 1, "int");
107 SDT_PROBE_ARGTYPE(proc, kernel, init, entry, 2, "int");
108 SDT_PROBE_DEFINE(proc, kernel, init, return, return);
109 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 0, "struct proc *");
110 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 1, "int");
111 SDT_PROBE_ARGTYPE(proc, kernel, init, return, 2, "int");
112
113 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
114 MALLOC_DEFINE(M_SESSION, "session", "session header");
115 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
116 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
117
118 static void doenterpgrp(struct proc *, struct pgrp *);
119 static void orphanpg(struct pgrp *pg);
120 static void fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp);
121 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
122 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp,
123 int preferthread);
124 static void pgadjustjobc(struct pgrp *pgrp, int entering);
125 static void pgdelete(struct pgrp *);
126 static int proc_ctor(void *mem, int size, void *arg, int flags);
127 static void proc_dtor(void *mem, int size, void *arg);
128 static int proc_init(void *mem, int size, int flags);
129 static void proc_fini(void *mem, int size);
130 static void pargs_free(struct pargs *pa);
131
132 /*
133 * Other process lists
134 */
135 struct pidhashhead *pidhashtbl;
136 u_long pidhash;
137 struct pgrphashhead *pgrphashtbl;
138 u_long pgrphash;
139 struct proclist allproc;
140 struct proclist zombproc;
141 struct sx allproc_lock;
142 struct sx proctree_lock;
143 struct mtx ppeers_lock;
144 uma_zone_t proc_zone;
145
146 int kstack_pages = KSTACK_PAGES;
147 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0,
148 "Kernel stack size in pages");
149
150 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
151 #ifdef COMPAT_FREEBSD32
152 CTASSERT(sizeof(struct kinfo_proc32) == KINFO_PROC32_SIZE);
153 #endif
154
155 /*
156 * Initialize global process hashing structures.
157 */
158 void
159 procinit()
160 {
161
162 sx_init(&allproc_lock, "allproc");
163 sx_init(&proctree_lock, "proctree");
164 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
165 LIST_INIT(&allproc);
166 LIST_INIT(&zombproc);
167 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
168 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
169 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
170 proc_ctor, proc_dtor, proc_init, proc_fini,
171 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
172 uihashinit();
173 }
174
175 /*
176 * Prepare a proc for use.
177 */
178 static int
179 proc_ctor(void *mem, int size, void *arg, int flags)
180 {
181 struct proc *p;
182
183 p = (struct proc *)mem;
184 SDT_PROBE(proc, kernel, ctor , entry, p, size, arg, flags, 0);
185 EVENTHANDLER_INVOKE(process_ctor, p);
186 SDT_PROBE(proc, kernel, ctor , return, p, size, arg, flags, 0);
187 return (0);
188 }
189
190 /*
191 * Reclaim a proc after use.
192 */
193 static void
194 proc_dtor(void *mem, int size, void *arg)
195 {
196 struct proc *p;
197 struct thread *td;
198
199 /* INVARIANTS checks go here */
200 p = (struct proc *)mem;
201 td = FIRST_THREAD_IN_PROC(p);
202 SDT_PROBE(proc, kernel, dtor, entry, p, size, arg, td, 0);
203 if (td != NULL) {
204 #ifdef INVARIANTS
205 KASSERT((p->p_numthreads == 1),
206 ("bad number of threads in exiting process"));
207 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
208 #endif
209 /* Free all OSD associated to this thread. */
210 osd_thread_exit(td);
211 }
212 EVENTHANDLER_INVOKE(process_dtor, p);
213 if (p->p_ksi != NULL)
214 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
215 SDT_PROBE(proc, kernel, dtor, return, p, size, arg, 0, 0);
216 }
217
218 /*
219 * Initialize type-stable parts of a proc (when newly created).
220 */
221 static int
222 proc_init(void *mem, int size, int flags)
223 {
224 struct proc *p;
225
226 p = (struct proc *)mem;
227 SDT_PROBE(proc, kernel, init, entry, p, size, flags, 0, 0);
228 p->p_sched = (struct p_sched *)&p[1];
229 bzero(&p->p_mtx, sizeof(struct mtx));
230 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
231 mtx_init(&p->p_slock, "process slock", NULL, MTX_SPIN | MTX_RECURSE);
232 cv_init(&p->p_pwait, "ppwait");
233 cv_init(&p->p_dbgwait, "dbgwait");
234 TAILQ_INIT(&p->p_threads); /* all threads in proc */
235 EVENTHANDLER_INVOKE(process_init, p);
236 p->p_stats = pstats_alloc();
237 SDT_PROBE(proc, kernel, init, return, p, size, flags, 0, 0);
238 return (0);
239 }
240
241 /*
242 * UMA should ensure that this function is never called.
243 * Freeing a proc structure would violate type stability.
244 */
245 static void
246 proc_fini(void *mem, int size)
247 {
248 #ifdef notnow
249 struct proc *p;
250
251 p = (struct proc *)mem;
252 EVENTHANDLER_INVOKE(process_fini, p);
253 pstats_free(p->p_stats);
254 thread_free(FIRST_THREAD_IN_PROC(p));
255 mtx_destroy(&p->p_mtx);
256 if (p->p_ksi != NULL)
257 ksiginfo_free(p->p_ksi);
258 #else
259 panic("proc reclaimed");
260 #endif
261 }
262
263 /*
264 * Is p an inferior of the current process?
265 */
266 int
267 inferior(p)
268 register struct proc *p;
269 {
270
271 sx_assert(&proctree_lock, SX_LOCKED);
272 for (; p != curproc; p = p->p_pptr)
273 if (p->p_pid == 0)
274 return (0);
275 return (1);
276 }
277
278 /*
279 * Locate a process by number; return only "live" processes -- i.e., neither
280 * zombies nor newly born but incompletely initialized processes. By not
281 * returning processes in the PRS_NEW state, we allow callers to avoid
282 * testing for that condition to avoid dereferencing p_ucred, et al.
283 */
284 struct proc *
285 pfind(pid)
286 register pid_t pid;
287 {
288 register struct proc *p;
289
290 sx_slock(&allproc_lock);
291 LIST_FOREACH(p, PIDHASH(pid), p_hash)
292 if (p->p_pid == pid) {
293 PROC_LOCK(p);
294 if (p->p_state == PRS_NEW) {
295 PROC_UNLOCK(p);
296 p = NULL;
297 }
298 break;
299 }
300 sx_sunlock(&allproc_lock);
301 return (p);
302 }
303
304 /*
305 * Locate a process group by number.
306 * The caller must hold proctree_lock.
307 */
308 struct pgrp *
309 pgfind(pgid)
310 register pid_t pgid;
311 {
312 register struct pgrp *pgrp;
313
314 sx_assert(&proctree_lock, SX_LOCKED);
315
316 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
317 if (pgrp->pg_id == pgid) {
318 PGRP_LOCK(pgrp);
319 return (pgrp);
320 }
321 }
322 return (NULL);
323 }
324
325 /*
326 * Create a new process group.
327 * pgid must be equal to the pid of p.
328 * Begin a new session if required.
329 */
330 int
331 enterpgrp(p, pgid, pgrp, sess)
332 register struct proc *p;
333 pid_t pgid;
334 struct pgrp *pgrp;
335 struct session *sess;
336 {
337 struct pgrp *pgrp2;
338
339 sx_assert(&proctree_lock, SX_XLOCKED);
340
341 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
342 KASSERT(p->p_pid == pgid,
343 ("enterpgrp: new pgrp and pid != pgid"));
344
345 pgrp2 = pgfind(pgid);
346
347 KASSERT(pgrp2 == NULL,
348 ("enterpgrp: pgrp with pgid exists"));
349 KASSERT(!SESS_LEADER(p),
350 ("enterpgrp: session leader attempted setpgrp"));
351
352 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
353
354 if (sess != NULL) {
355 /*
356 * new session
357 */
358 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
359 PROC_LOCK(p);
360 p->p_flag &= ~P_CONTROLT;
361 PROC_UNLOCK(p);
362 PGRP_LOCK(pgrp);
363 sess->s_leader = p;
364 sess->s_sid = p->p_pid;
365 refcount_init(&sess->s_count, 1);
366 sess->s_ttyvp = NULL;
367 sess->s_ttyp = NULL;
368 bcopy(p->p_session->s_login, sess->s_login,
369 sizeof(sess->s_login));
370 pgrp->pg_session = sess;
371 KASSERT(p == curproc,
372 ("enterpgrp: mksession and p != curproc"));
373 } else {
374 pgrp->pg_session = p->p_session;
375 sess_hold(pgrp->pg_session);
376 PGRP_LOCK(pgrp);
377 }
378 pgrp->pg_id = pgid;
379 LIST_INIT(&pgrp->pg_members);
380
381 /*
382 * As we have an exclusive lock of proctree_lock,
383 * this should not deadlock.
384 */
385 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
386 pgrp->pg_jobc = 0;
387 SLIST_INIT(&pgrp->pg_sigiolst);
388 PGRP_UNLOCK(pgrp);
389
390 doenterpgrp(p, pgrp);
391
392 return (0);
393 }
394
395 /*
396 * Move p to an existing process group
397 */
398 int
399 enterthispgrp(p, pgrp)
400 register struct proc *p;
401 struct pgrp *pgrp;
402 {
403
404 sx_assert(&proctree_lock, SX_XLOCKED);
405 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
406 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
407 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
408 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
409 KASSERT(pgrp->pg_session == p->p_session,
410 ("%s: pgrp's session %p, p->p_session %p.\n",
411 __func__,
412 pgrp->pg_session,
413 p->p_session));
414 KASSERT(pgrp != p->p_pgrp,
415 ("%s: p belongs to pgrp.", __func__));
416
417 doenterpgrp(p, pgrp);
418
419 return (0);
420 }
421
422 /*
423 * Move p to a process group
424 */
425 static void
426 doenterpgrp(p, pgrp)
427 struct proc *p;
428 struct pgrp *pgrp;
429 {
430 struct pgrp *savepgrp;
431
432 sx_assert(&proctree_lock, SX_XLOCKED);
433 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
434 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
435 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
436 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
437
438 savepgrp = p->p_pgrp;
439
440 /*
441 * Adjust eligibility of affected pgrps to participate in job control.
442 * Increment eligibility counts before decrementing, otherwise we
443 * could reach 0 spuriously during the first call.
444 */
445 fixjobc(p, pgrp, 1);
446 fixjobc(p, p->p_pgrp, 0);
447
448 PGRP_LOCK(pgrp);
449 PGRP_LOCK(savepgrp);
450 PROC_LOCK(p);
451 LIST_REMOVE(p, p_pglist);
452 p->p_pgrp = pgrp;
453 PROC_UNLOCK(p);
454 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
455 PGRP_UNLOCK(savepgrp);
456 PGRP_UNLOCK(pgrp);
457 if (LIST_EMPTY(&savepgrp->pg_members))
458 pgdelete(savepgrp);
459 }
460
461 /*
462 * remove process from process group
463 */
464 int
465 leavepgrp(p)
466 register struct proc *p;
467 {
468 struct pgrp *savepgrp;
469
470 sx_assert(&proctree_lock, SX_XLOCKED);
471 savepgrp = p->p_pgrp;
472 PGRP_LOCK(savepgrp);
473 PROC_LOCK(p);
474 LIST_REMOVE(p, p_pglist);
475 p->p_pgrp = NULL;
476 PROC_UNLOCK(p);
477 PGRP_UNLOCK(savepgrp);
478 if (LIST_EMPTY(&savepgrp->pg_members))
479 pgdelete(savepgrp);
480 return (0);
481 }
482
483 /*
484 * delete a process group
485 */
486 static void
487 pgdelete(pgrp)
488 register struct pgrp *pgrp;
489 {
490 struct session *savesess;
491 struct tty *tp;
492
493 sx_assert(&proctree_lock, SX_XLOCKED);
494 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
495 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
496
497 /*
498 * Reset any sigio structures pointing to us as a result of
499 * F_SETOWN with our pgid.
500 */
501 funsetownlst(&pgrp->pg_sigiolst);
502
503 PGRP_LOCK(pgrp);
504 tp = pgrp->pg_session->s_ttyp;
505 LIST_REMOVE(pgrp, pg_hash);
506 savesess = pgrp->pg_session;
507 PGRP_UNLOCK(pgrp);
508
509 /* Remove the reference to the pgrp before deallocating it. */
510 if (tp != NULL) {
511 tty_lock(tp);
512 tty_rel_pgrp(tp, pgrp);
513 }
514
515 mtx_destroy(&pgrp->pg_mtx);
516 free(pgrp, M_PGRP);
517 sess_release(savesess);
518 }
519
520 static void
521 pgadjustjobc(pgrp, entering)
522 struct pgrp *pgrp;
523 int entering;
524 {
525
526 PGRP_LOCK(pgrp);
527 if (entering)
528 pgrp->pg_jobc++;
529 else {
530 --pgrp->pg_jobc;
531 if (pgrp->pg_jobc == 0)
532 orphanpg(pgrp);
533 }
534 PGRP_UNLOCK(pgrp);
535 }
536
537 /*
538 * Adjust pgrp jobc counters when specified process changes process group.
539 * We count the number of processes in each process group that "qualify"
540 * the group for terminal job control (those with a parent in a different
541 * process group of the same session). If that count reaches zero, the
542 * process group becomes orphaned. Check both the specified process'
543 * process group and that of its children.
544 * entering == 0 => p is leaving specified group.
545 * entering == 1 => p is entering specified group.
546 */
547 void
548 fixjobc(p, pgrp, entering)
549 register struct proc *p;
550 register struct pgrp *pgrp;
551 int entering;
552 {
553 register struct pgrp *hispgrp;
554 register struct session *mysession;
555
556 sx_assert(&proctree_lock, SX_LOCKED);
557 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
558 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
559 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
560
561 /*
562 * Check p's parent to see whether p qualifies its own process
563 * group; if so, adjust count for p's process group.
564 */
565 mysession = pgrp->pg_session;
566 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
567 hispgrp->pg_session == mysession)
568 pgadjustjobc(pgrp, entering);
569
570 /*
571 * Check this process' children to see whether they qualify
572 * their process groups; if so, adjust counts for children's
573 * process groups.
574 */
575 LIST_FOREACH(p, &p->p_children, p_sibling) {
576 hispgrp = p->p_pgrp;
577 if (hispgrp == pgrp ||
578 hispgrp->pg_session != mysession)
579 continue;
580 PROC_LOCK(p);
581 if (p->p_state == PRS_ZOMBIE) {
582 PROC_UNLOCK(p);
583 continue;
584 }
585 PROC_UNLOCK(p);
586 pgadjustjobc(hispgrp, entering);
587 }
588 }
589
590 /*
591 * A process group has become orphaned;
592 * if there are any stopped processes in the group,
593 * hang-up all process in that group.
594 */
595 static void
596 orphanpg(pg)
597 struct pgrp *pg;
598 {
599 register struct proc *p;
600
601 PGRP_LOCK_ASSERT(pg, MA_OWNED);
602
603 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
604 PROC_LOCK(p);
605 if (P_SHOULDSTOP(p)) {
606 PROC_UNLOCK(p);
607 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
608 PROC_LOCK(p);
609 psignal(p, SIGHUP);
610 psignal(p, SIGCONT);
611 PROC_UNLOCK(p);
612 }
613 return;
614 }
615 PROC_UNLOCK(p);
616 }
617 }
618
619 void
620 sess_hold(struct session *s)
621 {
622
623 refcount_acquire(&s->s_count);
624 }
625
626 void
627 sess_release(struct session *s)
628 {
629
630 if (refcount_release(&s->s_count)) {
631 if (s->s_ttyp != NULL) {
632 tty_lock(s->s_ttyp);
633 tty_rel_sess(s->s_ttyp, s);
634 }
635 mtx_destroy(&s->s_mtx);
636 free(s, M_SESSION);
637 }
638 }
639
640 #include "opt_ddb.h"
641 #ifdef DDB
642 #include <ddb/ddb.h>
643
644 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
645 {
646 register struct pgrp *pgrp;
647 register struct proc *p;
648 register int i;
649
650 for (i = 0; i <= pgrphash; i++) {
651 if (!LIST_EMPTY(&pgrphashtbl[i])) {
652 printf("\tindx %d\n", i);
653 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
654 printf(
655 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
656 (void *)pgrp, (long)pgrp->pg_id,
657 (void *)pgrp->pg_session,
658 pgrp->pg_session->s_count,
659 (void *)LIST_FIRST(&pgrp->pg_members));
660 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
661 printf("\t\tpid %ld addr %p pgrp %p\n",
662 (long)p->p_pid, (void *)p,
663 (void *)p->p_pgrp);
664 }
665 }
666 }
667 }
668 }
669 #endif /* DDB */
670
671 /*
672 * Calculate the kinfo_proc members which contain process-wide
673 * informations.
674 * Must be called with the target process locked.
675 */
676 static void
677 fill_kinfo_aggregate(struct proc *p, struct kinfo_proc *kp)
678 {
679 struct thread *td;
680
681 PROC_LOCK_ASSERT(p, MA_OWNED);
682
683 kp->ki_estcpu = 0;
684 kp->ki_pctcpu = 0;
685 FOREACH_THREAD_IN_PROC(p, td) {
686 thread_lock(td);
687 kp->ki_pctcpu += sched_pctcpu(td);
688 kp->ki_estcpu += td->td_estcpu;
689 thread_unlock(td);
690 }
691 }
692
693 /*
694 * Clear kinfo_proc and fill in any information that is common
695 * to all threads in the process.
696 * Must be called with the target process locked.
697 */
698 static void
699 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
700 {
701 struct thread *td0;
702 struct tty *tp;
703 struct session *sp;
704 struct ucred *cred;
705 struct sigacts *ps;
706
707 PROC_LOCK_ASSERT(p, MA_OWNED);
708 bzero(kp, sizeof(*kp));
709
710 kp->ki_structsize = sizeof(*kp);
711 kp->ki_paddr = p;
712 kp->ki_addr =/* p->p_addr; */0; /* XXX */
713 kp->ki_args = p->p_args;
714 kp->ki_textvp = p->p_textvp;
715 #ifdef KTRACE
716 kp->ki_tracep = p->p_tracevp;
717 kp->ki_traceflag = p->p_traceflag;
718 #endif
719 kp->ki_fd = p->p_fd;
720 kp->ki_vmspace = p->p_vmspace;
721 kp->ki_flag = p->p_flag;
722 cred = p->p_ucred;
723 if (cred) {
724 kp->ki_uid = cred->cr_uid;
725 kp->ki_ruid = cred->cr_ruid;
726 kp->ki_svuid = cred->cr_svuid;
727 kp->ki_cr_flags = cred->cr_flags;
728 /* XXX bde doesn't like KI_NGROUPS */
729 if (cred->cr_ngroups > KI_NGROUPS) {
730 kp->ki_ngroups = KI_NGROUPS;
731 kp->ki_cr_flags |= KI_CRF_GRP_OVERFLOW;
732 } else
733 kp->ki_ngroups = cred->cr_ngroups;
734 bcopy(cred->cr_groups, kp->ki_groups,
735 kp->ki_ngroups * sizeof(gid_t));
736 kp->ki_rgid = cred->cr_rgid;
737 kp->ki_svgid = cred->cr_svgid;
738 /* If jailed(cred), emulate the old P_JAILED flag. */
739 if (jailed(cred)) {
740 kp->ki_flag |= P_JAILED;
741 /* If inside the jail, use 0 as a jail ID. */
742 if (cred->cr_prison != curthread->td_ucred->cr_prison)
743 kp->ki_jid = cred->cr_prison->pr_id;
744 }
745 }
746 ps = p->p_sigacts;
747 if (ps) {
748 mtx_lock(&ps->ps_mtx);
749 kp->ki_sigignore = ps->ps_sigignore;
750 kp->ki_sigcatch = ps->ps_sigcatch;
751 mtx_unlock(&ps->ps_mtx);
752 }
753 if (p->p_state != PRS_NEW &&
754 p->p_state != PRS_ZOMBIE &&
755 p->p_vmspace != NULL) {
756 struct vmspace *vm = p->p_vmspace;
757
758 kp->ki_size = vm->vm_map.size;
759 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
760 FOREACH_THREAD_IN_PROC(p, td0) {
761 if (!TD_IS_SWAPPED(td0))
762 kp->ki_rssize += td0->td_kstack_pages;
763 }
764 kp->ki_swrss = vm->vm_swrss;
765 kp->ki_tsize = vm->vm_tsize;
766 kp->ki_dsize = vm->vm_dsize;
767 kp->ki_ssize = vm->vm_ssize;
768 } else if (p->p_state == PRS_ZOMBIE)
769 kp->ki_stat = SZOMB;
770 if (kp->ki_flag & P_INMEM)
771 kp->ki_sflag = PS_INMEM;
772 else
773 kp->ki_sflag = 0;
774 /* Calculate legacy swtime as seconds since 'swtick'. */
775 kp->ki_swtime = (ticks - p->p_swtick) / hz;
776 kp->ki_pid = p->p_pid;
777 kp->ki_nice = p->p_nice;
778 PROC_SLOCK(p);
779 rufetch(p, &kp->ki_rusage);
780 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
781 PROC_SUNLOCK(p);
782 if ((p->p_flag & P_INMEM) && p->p_stats != NULL) {
783 kp->ki_start = p->p_stats->p_start;
784 timevaladd(&kp->ki_start, &boottime);
785 PROC_SLOCK(p);
786 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
787 PROC_SUNLOCK(p);
788 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
789
790 /* Some callers want child-times in a single value */
791 kp->ki_childtime = kp->ki_childstime;
792 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
793 }
794 tp = NULL;
795 if (p->p_pgrp) {
796 kp->ki_pgid = p->p_pgrp->pg_id;
797 kp->ki_jobc = p->p_pgrp->pg_jobc;
798 sp = p->p_pgrp->pg_session;
799
800 if (sp != NULL) {
801 kp->ki_sid = sp->s_sid;
802 SESS_LOCK(sp);
803 strlcpy(kp->ki_login, sp->s_login,
804 sizeof(kp->ki_login));
805 if (sp->s_ttyvp)
806 kp->ki_kiflag |= KI_CTTY;
807 if (SESS_LEADER(p))
808 kp->ki_kiflag |= KI_SLEADER;
809 /* XXX proctree_lock */
810 tp = sp->s_ttyp;
811 SESS_UNLOCK(sp);
812 }
813 }
814 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
815 kp->ki_tdev = tty_udev(tp);
816 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
817 if (tp->t_session)
818 kp->ki_tsid = tp->t_session->s_sid;
819 } else
820 kp->ki_tdev = NODEV;
821 if (p->p_comm[0] != '\0')
822 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
823 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
824 p->p_sysent->sv_name[0] != '\0')
825 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
826 kp->ki_siglist = p->p_siglist;
827 kp->ki_xstat = p->p_xstat;
828 kp->ki_acflag = p->p_acflag;
829 kp->ki_lock = p->p_lock;
830 if (p->p_pptr)
831 kp->ki_ppid = p->p_pptr->p_pid;
832 }
833
834 /*
835 * Fill in information that is thread specific. Must be called with
836 * target process locked. If 'preferthread' is set, overwrite certain
837 * process-related fields that are maintained for both threads and
838 * processes.
839 */
840 static void
841 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp, int preferthread)
842 {
843 struct proc *p;
844
845 p = td->td_proc;
846 kp->ki_tdaddr = td;
847 PROC_LOCK_ASSERT(p, MA_OWNED);
848
849 thread_lock(td);
850 if (td->td_wmesg != NULL)
851 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
852 else
853 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
854 strlcpy(kp->ki_ocomm, td->td_name, sizeof(kp->ki_ocomm));
855 if (TD_ON_LOCK(td)) {
856 kp->ki_kiflag |= KI_LOCKBLOCK;
857 strlcpy(kp->ki_lockname, td->td_lockname,
858 sizeof(kp->ki_lockname));
859 } else {
860 kp->ki_kiflag &= ~KI_LOCKBLOCK;
861 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
862 }
863
864 if (p->p_state == PRS_NORMAL) { /* approximate. */
865 if (TD_ON_RUNQ(td) ||
866 TD_CAN_RUN(td) ||
867 TD_IS_RUNNING(td)) {
868 kp->ki_stat = SRUN;
869 } else if (P_SHOULDSTOP(p)) {
870 kp->ki_stat = SSTOP;
871 } else if (TD_IS_SLEEPING(td)) {
872 kp->ki_stat = SSLEEP;
873 } else if (TD_ON_LOCK(td)) {
874 kp->ki_stat = SLOCK;
875 } else {
876 kp->ki_stat = SWAIT;
877 }
878 } else if (p->p_state == PRS_ZOMBIE) {
879 kp->ki_stat = SZOMB;
880 } else {
881 kp->ki_stat = SIDL;
882 }
883
884 /* Things in the thread */
885 kp->ki_wchan = td->td_wchan;
886 kp->ki_pri.pri_level = td->td_priority;
887 kp->ki_pri.pri_native = td->td_base_pri;
888 kp->ki_lastcpu = td->td_lastcpu;
889 kp->ki_oncpu = td->td_oncpu;
890 kp->ki_tdflags = td->td_flags;
891 kp->ki_tid = td->td_tid;
892 kp->ki_numthreads = p->p_numthreads;
893 kp->ki_pcb = td->td_pcb;
894 kp->ki_kstack = (void *)td->td_kstack;
895 kp->ki_slptime = (ticks - td->td_slptick) / hz;
896 kp->ki_pri.pri_class = td->td_pri_class;
897 kp->ki_pri.pri_user = td->td_user_pri;
898
899 if (preferthread) {
900 kp->ki_runtime = cputick2usec(td->td_rux.rux_runtime);
901 kp->ki_pctcpu = sched_pctcpu(td);
902 kp->ki_estcpu = td->td_estcpu;
903 }
904
905 /* We can't get this anymore but ps etc never used it anyway. */
906 kp->ki_rqindex = 0;
907
908 if (preferthread)
909 kp->ki_siglist = td->td_siglist;
910 kp->ki_sigmask = td->td_sigmask;
911 thread_unlock(td);
912 }
913
914 /*
915 * Fill in a kinfo_proc structure for the specified process.
916 * Must be called with the target process locked.
917 */
918 void
919 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
920 {
921
922 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
923
924 fill_kinfo_proc_only(p, kp);
925 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp, 0);
926 fill_kinfo_aggregate(p, kp);
927 }
928
929 struct pstats *
930 pstats_alloc(void)
931 {
932
933 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
934 }
935
936 /*
937 * Copy parts of p_stats; zero the rest of p_stats (statistics).
938 */
939 void
940 pstats_fork(struct pstats *src, struct pstats *dst)
941 {
942
943 bzero(&dst->pstat_startzero,
944 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
945 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
946 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
947 }
948
949 void
950 pstats_free(struct pstats *ps)
951 {
952
953 free(ps, M_SUBPROC);
954 }
955
956 /*
957 * Locate a zombie process by number
958 */
959 struct proc *
960 zpfind(pid_t pid)
961 {
962 struct proc *p;
963
964 sx_slock(&allproc_lock);
965 LIST_FOREACH(p, &zombproc, p_list)
966 if (p->p_pid == pid) {
967 PROC_LOCK(p);
968 break;
969 }
970 sx_sunlock(&allproc_lock);
971 return (p);
972 }
973
974 #define KERN_PROC_ZOMBMASK 0x3
975 #define KERN_PROC_NOTHREADS 0x4
976
977 #ifdef COMPAT_FREEBSD32
978
979 /*
980 * This function is typically used to copy out the kernel address, so
981 * it can be replaced by assignment of zero.
982 */
983 static inline uint32_t
984 ptr32_trim(void *ptr)
985 {
986 uintptr_t uptr;
987
988 uptr = (uintptr_t)ptr;
989 return ((uptr > UINT_MAX) ? 0 : uptr);
990 }
991
992 #define PTRTRIM_CP(src,dst,fld) \
993 do { (dst).fld = ptr32_trim((src).fld); } while (0)
994
995 static void
996 freebsd32_kinfo_proc_out(const struct kinfo_proc *ki, struct kinfo_proc32 *ki32)
997 {
998 int i;
999
1000 bzero(ki32, sizeof(struct kinfo_proc32));
1001 ki32->ki_structsize = sizeof(struct kinfo_proc32);
1002 CP(*ki, *ki32, ki_layout);
1003 PTRTRIM_CP(*ki, *ki32, ki_args);
1004 PTRTRIM_CP(*ki, *ki32, ki_paddr);
1005 PTRTRIM_CP(*ki, *ki32, ki_addr);
1006 PTRTRIM_CP(*ki, *ki32, ki_tracep);
1007 PTRTRIM_CP(*ki, *ki32, ki_textvp);
1008 PTRTRIM_CP(*ki, *ki32, ki_fd);
1009 PTRTRIM_CP(*ki, *ki32, ki_vmspace);
1010 PTRTRIM_CP(*ki, *ki32, ki_wchan);
1011 CP(*ki, *ki32, ki_pid);
1012 CP(*ki, *ki32, ki_ppid);
1013 CP(*ki, *ki32, ki_pgid);
1014 CP(*ki, *ki32, ki_tpgid);
1015 CP(*ki, *ki32, ki_sid);
1016 CP(*ki, *ki32, ki_tsid);
1017 CP(*ki, *ki32, ki_jobc);
1018 CP(*ki, *ki32, ki_tdev);
1019 CP(*ki, *ki32, ki_siglist);
1020 CP(*ki, *ki32, ki_sigmask);
1021 CP(*ki, *ki32, ki_sigignore);
1022 CP(*ki, *ki32, ki_sigcatch);
1023 CP(*ki, *ki32, ki_uid);
1024 CP(*ki, *ki32, ki_ruid);
1025 CP(*ki, *ki32, ki_svuid);
1026 CP(*ki, *ki32, ki_rgid);
1027 CP(*ki, *ki32, ki_svgid);
1028 CP(*ki, *ki32, ki_ngroups);
1029 for (i = 0; i < KI_NGROUPS; i++)
1030 CP(*ki, *ki32, ki_groups[i]);
1031 CP(*ki, *ki32, ki_size);
1032 CP(*ki, *ki32, ki_rssize);
1033 CP(*ki, *ki32, ki_swrss);
1034 CP(*ki, *ki32, ki_tsize);
1035 CP(*ki, *ki32, ki_dsize);
1036 CP(*ki, *ki32, ki_ssize);
1037 CP(*ki, *ki32, ki_xstat);
1038 CP(*ki, *ki32, ki_acflag);
1039 CP(*ki, *ki32, ki_pctcpu);
1040 CP(*ki, *ki32, ki_estcpu);
1041 CP(*ki, *ki32, ki_slptime);
1042 CP(*ki, *ki32, ki_swtime);
1043 CP(*ki, *ki32, ki_runtime);
1044 TV_CP(*ki, *ki32, ki_start);
1045 TV_CP(*ki, *ki32, ki_childtime);
1046 CP(*ki, *ki32, ki_flag);
1047 CP(*ki, *ki32, ki_kiflag);
1048 CP(*ki, *ki32, ki_traceflag);
1049 CP(*ki, *ki32, ki_stat);
1050 CP(*ki, *ki32, ki_nice);
1051 CP(*ki, *ki32, ki_lock);
1052 CP(*ki, *ki32, ki_rqindex);
1053 CP(*ki, *ki32, ki_oncpu);
1054 CP(*ki, *ki32, ki_lastcpu);
1055 bcopy(ki->ki_ocomm, ki32->ki_ocomm, OCOMMLEN + 1);
1056 bcopy(ki->ki_wmesg, ki32->ki_wmesg, WMESGLEN + 1);
1057 bcopy(ki->ki_login, ki32->ki_login, LOGNAMELEN + 1);
1058 bcopy(ki->ki_lockname, ki32->ki_lockname, LOCKNAMELEN + 1);
1059 bcopy(ki->ki_comm, ki32->ki_comm, COMMLEN + 1);
1060 bcopy(ki->ki_emul, ki32->ki_emul, KI_EMULNAMELEN + 1);
1061 CP(*ki, *ki32, ki_cr_flags);
1062 CP(*ki, *ki32, ki_jid);
1063 CP(*ki, *ki32, ki_numthreads);
1064 CP(*ki, *ki32, ki_tid);
1065 CP(*ki, *ki32, ki_pri);
1066 freebsd32_rusage_out(&ki->ki_rusage, &ki32->ki_rusage);
1067 freebsd32_rusage_out(&ki->ki_rusage_ch, &ki32->ki_rusage_ch);
1068 PTRTRIM_CP(*ki, *ki32, ki_pcb);
1069 PTRTRIM_CP(*ki, *ki32, ki_kstack);
1070 PTRTRIM_CP(*ki, *ki32, ki_udata);
1071 CP(*ki, *ki32, ki_sflag);
1072 CP(*ki, *ki32, ki_tdflags);
1073 }
1074
1075 static int
1076 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req)
1077 {
1078 struct kinfo_proc32 ki32;
1079 int error;
1080
1081 if (req->flags & SCTL_MASK32) {
1082 freebsd32_kinfo_proc_out(ki, &ki32);
1083 error = SYSCTL_OUT(req, &ki32, sizeof(struct kinfo_proc32));
1084 } else
1085 error = SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc));
1086 return (error);
1087 }
1088 #else
1089 static int
1090 sysctl_out_proc_copyout(struct kinfo_proc *ki, struct sysctl_req *req)
1091 {
1092
1093 return (SYSCTL_OUT(req, ki, sizeof(struct kinfo_proc)));
1094 }
1095 #endif
1096
1097 /*
1098 * Must be called with the process locked and will return with it unlocked.
1099 */
1100 static int
1101 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
1102 {
1103 struct thread *td;
1104 struct kinfo_proc kinfo_proc;
1105 int error = 0;
1106 struct proc *np;
1107 pid_t pid = p->p_pid;
1108
1109 PROC_LOCK_ASSERT(p, MA_OWNED);
1110 MPASS(FIRST_THREAD_IN_PROC(p) != NULL);
1111
1112 fill_kinfo_proc(p, &kinfo_proc);
1113 if (flags & KERN_PROC_NOTHREADS)
1114 error = sysctl_out_proc_copyout(&kinfo_proc, req);
1115 else {
1116 FOREACH_THREAD_IN_PROC(p, td) {
1117 fill_kinfo_thread(td, &kinfo_proc, 1);
1118 error = sysctl_out_proc_copyout(&kinfo_proc, req);
1119 if (error)
1120 break;
1121 }
1122 }
1123 PROC_UNLOCK(p);
1124 if (error)
1125 return (error);
1126 if (flags & KERN_PROC_ZOMBMASK)
1127 np = zpfind(pid);
1128 else {
1129 if (pid == 0)
1130 return (0);
1131 np = pfind(pid);
1132 }
1133 if (np == NULL)
1134 return (ESRCH);
1135 if (np != p) {
1136 PROC_UNLOCK(np);
1137 return (ESRCH);
1138 }
1139 PROC_UNLOCK(np);
1140 return (0);
1141 }
1142
1143 static int
1144 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
1145 {
1146 int *name = (int*) arg1;
1147 u_int namelen = arg2;
1148 struct proc *p;
1149 int flags, doingzomb, oid_number;
1150 int error = 0;
1151
1152 oid_number = oidp->oid_number;
1153 if (oid_number != KERN_PROC_ALL &&
1154 (oid_number & KERN_PROC_INC_THREAD) == 0)
1155 flags = KERN_PROC_NOTHREADS;
1156 else {
1157 flags = 0;
1158 oid_number &= ~KERN_PROC_INC_THREAD;
1159 }
1160 if (oid_number == KERN_PROC_PID) {
1161 if (namelen != 1)
1162 return (EINVAL);
1163 error = sysctl_wire_old_buffer(req, 0);
1164 if (error)
1165 return (error);
1166 p = pfind((pid_t)name[0]);
1167 if (!p)
1168 return (ESRCH);
1169 if ((error = p_cansee(curthread, p))) {
1170 PROC_UNLOCK(p);
1171 return (error);
1172 }
1173 error = sysctl_out_proc(p, req, flags);
1174 return (error);
1175 }
1176
1177 switch (oid_number) {
1178 case KERN_PROC_ALL:
1179 if (namelen != 0)
1180 return (EINVAL);
1181 break;
1182 case KERN_PROC_PROC:
1183 if (namelen != 0 && namelen != 1)
1184 return (EINVAL);
1185 break;
1186 default:
1187 if (namelen != 1)
1188 return (EINVAL);
1189 break;
1190 }
1191
1192 if (!req->oldptr) {
1193 /* overestimate by 5 procs */
1194 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1195 if (error)
1196 return (error);
1197 }
1198 error = sysctl_wire_old_buffer(req, 0);
1199 if (error != 0)
1200 return (error);
1201 sx_slock(&allproc_lock);
1202 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1203 if (!doingzomb)
1204 p = LIST_FIRST(&allproc);
1205 else
1206 p = LIST_FIRST(&zombproc);
1207 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1208 /*
1209 * Skip embryonic processes.
1210 */
1211 PROC_LOCK(p);
1212 if (p->p_state == PRS_NEW) {
1213 PROC_UNLOCK(p);
1214 continue;
1215 }
1216 KASSERT(p->p_ucred != NULL,
1217 ("process credential is NULL for non-NEW proc"));
1218 /*
1219 * Show a user only appropriate processes.
1220 */
1221 if (p_cansee(curthread, p)) {
1222 PROC_UNLOCK(p);
1223 continue;
1224 }
1225 /*
1226 * TODO - make more efficient (see notes below).
1227 * do by session.
1228 */
1229 switch (oid_number) {
1230
1231 case KERN_PROC_GID:
1232 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1233 PROC_UNLOCK(p);
1234 continue;
1235 }
1236 break;
1237
1238 case KERN_PROC_PGRP:
1239 /* could do this by traversing pgrp */
1240 if (p->p_pgrp == NULL ||
1241 p->p_pgrp->pg_id != (pid_t)name[0]) {
1242 PROC_UNLOCK(p);
1243 continue;
1244 }
1245 break;
1246
1247 case KERN_PROC_RGID:
1248 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1249 PROC_UNLOCK(p);
1250 continue;
1251 }
1252 break;
1253
1254 case KERN_PROC_SESSION:
1255 if (p->p_session == NULL ||
1256 p->p_session->s_sid != (pid_t)name[0]) {
1257 PROC_UNLOCK(p);
1258 continue;
1259 }
1260 break;
1261
1262 case KERN_PROC_TTY:
1263 if ((p->p_flag & P_CONTROLT) == 0 ||
1264 p->p_session == NULL) {
1265 PROC_UNLOCK(p);
1266 continue;
1267 }
1268 /* XXX proctree_lock */
1269 SESS_LOCK(p->p_session);
1270 if (p->p_session->s_ttyp == NULL ||
1271 tty_udev(p->p_session->s_ttyp) !=
1272 (dev_t)name[0]) {
1273 SESS_UNLOCK(p->p_session);
1274 PROC_UNLOCK(p);
1275 continue;
1276 }
1277 SESS_UNLOCK(p->p_session);
1278 break;
1279
1280 case KERN_PROC_UID:
1281 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1282 PROC_UNLOCK(p);
1283 continue;
1284 }
1285 break;
1286
1287 case KERN_PROC_RUID:
1288 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1289 PROC_UNLOCK(p);
1290 continue;
1291 }
1292 break;
1293
1294 case KERN_PROC_PROC:
1295 break;
1296
1297 default:
1298 break;
1299
1300 }
1301
1302 error = sysctl_out_proc(p, req, flags | doingzomb);
1303 if (error) {
1304 sx_sunlock(&allproc_lock);
1305 return (error);
1306 }
1307 }
1308 }
1309 sx_sunlock(&allproc_lock);
1310 return (0);
1311 }
1312
1313 struct pargs *
1314 pargs_alloc(int len)
1315 {
1316 struct pargs *pa;
1317
1318 pa = malloc(sizeof(struct pargs) + len, M_PARGS,
1319 M_WAITOK);
1320 refcount_init(&pa->ar_ref, 1);
1321 pa->ar_length = len;
1322 return (pa);
1323 }
1324
1325 static void
1326 pargs_free(struct pargs *pa)
1327 {
1328
1329 free(pa, M_PARGS);
1330 }
1331
1332 void
1333 pargs_hold(struct pargs *pa)
1334 {
1335
1336 if (pa == NULL)
1337 return;
1338 refcount_acquire(&pa->ar_ref);
1339 }
1340
1341 void
1342 pargs_drop(struct pargs *pa)
1343 {
1344
1345 if (pa == NULL)
1346 return;
1347 if (refcount_release(&pa->ar_ref))
1348 pargs_free(pa);
1349 }
1350
1351 /*
1352 * This sysctl allows a process to retrieve the argument list or process
1353 * title for another process without groping around in the address space
1354 * of the other process. It also allow a process to set its own "process
1355 * title to a string of its own choice.
1356 */
1357 static int
1358 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1359 {
1360 int *name = (int*) arg1;
1361 u_int namelen = arg2;
1362 struct pargs *newpa, *pa;
1363 struct proc *p;
1364 int error = 0;
1365
1366 if (namelen != 1)
1367 return (EINVAL);
1368
1369 p = pfind((pid_t)name[0]);
1370 if (!p)
1371 return (ESRCH);
1372
1373 if ((error = p_cansee(curthread, p)) != 0) {
1374 PROC_UNLOCK(p);
1375 return (error);
1376 }
1377
1378 if (req->newptr && curproc != p) {
1379 PROC_UNLOCK(p);
1380 return (EPERM);
1381 }
1382
1383 pa = p->p_args;
1384 pargs_hold(pa);
1385 PROC_UNLOCK(p);
1386 if (pa != NULL)
1387 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1388 pargs_drop(pa);
1389 if (error != 0 || req->newptr == NULL)
1390 return (error);
1391
1392 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
1393 return (ENOMEM);
1394 newpa = pargs_alloc(req->newlen);
1395 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1396 if (error != 0) {
1397 pargs_free(newpa);
1398 return (error);
1399 }
1400 PROC_LOCK(p);
1401 pa = p->p_args;
1402 p->p_args = newpa;
1403 PROC_UNLOCK(p);
1404 pargs_drop(pa);
1405 return (0);
1406 }
1407
1408 /*
1409 * This sysctl allows a process to retrieve the path of the executable for
1410 * itself or another process.
1411 */
1412 static int
1413 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
1414 {
1415 pid_t *pidp = (pid_t *)arg1;
1416 unsigned int arglen = arg2;
1417 struct proc *p;
1418 struct vnode *vp;
1419 char *retbuf, *freebuf;
1420 int error, vfslocked;
1421
1422 if (arglen != 1)
1423 return (EINVAL);
1424 if (*pidp == -1) { /* -1 means this process */
1425 p = req->td->td_proc;
1426 } else {
1427 p = pfind(*pidp);
1428 if (p == NULL)
1429 return (ESRCH);
1430 if ((error = p_cansee(curthread, p)) != 0) {
1431 PROC_UNLOCK(p);
1432 return (error);
1433 }
1434 }
1435
1436 vp = p->p_textvp;
1437 if (vp == NULL) {
1438 if (*pidp != -1)
1439 PROC_UNLOCK(p);
1440 return (0);
1441 }
1442 vref(vp);
1443 if (*pidp != -1)
1444 PROC_UNLOCK(p);
1445 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1446 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1447 vrele(vp);
1448 VFS_UNLOCK_GIANT(vfslocked);
1449 if (error)
1450 return (error);
1451 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1452 free(freebuf, M_TEMP);
1453 return (error);
1454 }
1455
1456 static int
1457 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1458 {
1459 struct proc *p;
1460 char *sv_name;
1461 int *name;
1462 int namelen;
1463 int error;
1464
1465 namelen = arg2;
1466 if (namelen != 1)
1467 return (EINVAL);
1468
1469 name = (int *)arg1;
1470 if ((p = pfind((pid_t)name[0])) == NULL)
1471 return (ESRCH);
1472 if ((error = p_cansee(curthread, p))) {
1473 PROC_UNLOCK(p);
1474 return (error);
1475 }
1476 sv_name = p->p_sysent->sv_name;
1477 PROC_UNLOCK(p);
1478 return (sysctl_handle_string(oidp, sv_name, 0, req));
1479 }
1480
1481 #ifdef KINFO_OVMENTRY_SIZE
1482 CTASSERT(sizeof(struct kinfo_ovmentry) == KINFO_OVMENTRY_SIZE);
1483 #endif
1484
1485 #ifdef COMPAT_FREEBSD7
1486 static int
1487 sysctl_kern_proc_ovmmap(SYSCTL_HANDLER_ARGS)
1488 {
1489 vm_map_entry_t entry, tmp_entry;
1490 unsigned int last_timestamp;
1491 char *fullpath, *freepath;
1492 struct kinfo_ovmentry *kve;
1493 struct vattr va;
1494 struct ucred *cred;
1495 int error, *name;
1496 struct vnode *vp;
1497 struct proc *p;
1498 vm_map_t map;
1499 struct vmspace *vm;
1500
1501 name = (int *)arg1;
1502 if ((p = pfind((pid_t)name[0])) == NULL)
1503 return (ESRCH);
1504 if (p->p_flag & P_WEXIT) {
1505 PROC_UNLOCK(p);
1506 return (ESRCH);
1507 }
1508 if ((error = p_candebug(curthread, p))) {
1509 PROC_UNLOCK(p);
1510 return (error);
1511 }
1512 _PHOLD(p);
1513 PROC_UNLOCK(p);
1514 vm = vmspace_acquire_ref(p);
1515 if (vm == NULL) {
1516 PRELE(p);
1517 return (ESRCH);
1518 }
1519 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1520
1521 map = &p->p_vmspace->vm_map; /* XXXRW: More locking required? */
1522 vm_map_lock_read(map);
1523 for (entry = map->header.next; entry != &map->header;
1524 entry = entry->next) {
1525 vm_object_t obj, tobj, lobj;
1526 vm_offset_t addr;
1527 int vfslocked;
1528
1529 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1530 continue;
1531
1532 bzero(kve, sizeof(*kve));
1533 kve->kve_structsize = sizeof(*kve);
1534
1535 kve->kve_private_resident = 0;
1536 obj = entry->object.vm_object;
1537 if (obj != NULL) {
1538 VM_OBJECT_LOCK(obj);
1539 if (obj->shadow_count == 1)
1540 kve->kve_private_resident =
1541 obj->resident_page_count;
1542 }
1543 kve->kve_resident = 0;
1544 addr = entry->start;
1545 while (addr < entry->end) {
1546 if (pmap_extract(map->pmap, addr))
1547 kve->kve_resident++;
1548 addr += PAGE_SIZE;
1549 }
1550
1551 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1552 if (tobj != obj)
1553 VM_OBJECT_LOCK(tobj);
1554 if (lobj != obj)
1555 VM_OBJECT_UNLOCK(lobj);
1556 lobj = tobj;
1557 }
1558
1559 kve->kve_start = (void*)entry->start;
1560 kve->kve_end = (void*)entry->end;
1561 kve->kve_offset = (off_t)entry->offset;
1562
1563 if (entry->protection & VM_PROT_READ)
1564 kve->kve_protection |= KVME_PROT_READ;
1565 if (entry->protection & VM_PROT_WRITE)
1566 kve->kve_protection |= KVME_PROT_WRITE;
1567 if (entry->protection & VM_PROT_EXECUTE)
1568 kve->kve_protection |= KVME_PROT_EXEC;
1569
1570 if (entry->eflags & MAP_ENTRY_COW)
1571 kve->kve_flags |= KVME_FLAG_COW;
1572 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1573 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1574 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
1575 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
1576
1577 last_timestamp = map->timestamp;
1578 vm_map_unlock_read(map);
1579
1580 kve->kve_fileid = 0;
1581 kve->kve_fsid = 0;
1582 freepath = NULL;
1583 fullpath = "";
1584 if (lobj) {
1585 vp = NULL;
1586 switch (lobj->type) {
1587 case OBJT_DEFAULT:
1588 kve->kve_type = KVME_TYPE_DEFAULT;
1589 break;
1590 case OBJT_VNODE:
1591 kve->kve_type = KVME_TYPE_VNODE;
1592 vp = lobj->handle;
1593 vref(vp);
1594 break;
1595 case OBJT_SWAP:
1596 kve->kve_type = KVME_TYPE_SWAP;
1597 break;
1598 case OBJT_DEVICE:
1599 kve->kve_type = KVME_TYPE_DEVICE;
1600 break;
1601 case OBJT_PHYS:
1602 kve->kve_type = KVME_TYPE_PHYS;
1603 break;
1604 case OBJT_DEAD:
1605 kve->kve_type = KVME_TYPE_DEAD;
1606 break;
1607 case OBJT_SG:
1608 kve->kve_type = KVME_TYPE_SG;
1609 break;
1610 default:
1611 kve->kve_type = KVME_TYPE_UNKNOWN;
1612 break;
1613 }
1614 if (lobj != obj)
1615 VM_OBJECT_UNLOCK(lobj);
1616
1617 kve->kve_ref_count = obj->ref_count;
1618 kve->kve_shadow_count = obj->shadow_count;
1619 VM_OBJECT_UNLOCK(obj);
1620 if (vp != NULL) {
1621 vn_fullpath(curthread, vp, &fullpath,
1622 &freepath);
1623 cred = curthread->td_ucred;
1624 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1625 vn_lock(vp, LK_SHARED | LK_RETRY);
1626 if (VOP_GETATTR(vp, &va, cred) == 0) {
1627 kve->kve_fileid = va.va_fileid;
1628 kve->kve_fsid = va.va_fsid;
1629 }
1630 vput(vp);
1631 VFS_UNLOCK_GIANT(vfslocked);
1632 }
1633 } else {
1634 kve->kve_type = KVME_TYPE_NONE;
1635 kve->kve_ref_count = 0;
1636 kve->kve_shadow_count = 0;
1637 }
1638
1639 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
1640 if (freepath != NULL)
1641 free(freepath, M_TEMP);
1642
1643 error = SYSCTL_OUT(req, kve, sizeof(*kve));
1644 vm_map_lock_read(map);
1645 if (error)
1646 break;
1647 if (last_timestamp != map->timestamp) {
1648 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
1649 entry = tmp_entry;
1650 }
1651 }
1652 vm_map_unlock_read(map);
1653 vmspace_free(vm);
1654 PRELE(p);
1655 free(kve, M_TEMP);
1656 return (error);
1657 }
1658 #endif /* COMPAT_FREEBSD7 */
1659
1660 #ifdef KINFO_VMENTRY_SIZE
1661 CTASSERT(sizeof(struct kinfo_vmentry) == KINFO_VMENTRY_SIZE);
1662 #endif
1663
1664 static int
1665 sysctl_kern_proc_vmmap(SYSCTL_HANDLER_ARGS)
1666 {
1667 vm_map_entry_t entry, tmp_entry;
1668 unsigned int last_timestamp;
1669 char *fullpath, *freepath;
1670 struct kinfo_vmentry *kve;
1671 struct vattr va;
1672 struct ucred *cred;
1673 int error, *name;
1674 struct vnode *vp;
1675 struct proc *p;
1676 struct vmspace *vm;
1677 vm_map_t map;
1678
1679 name = (int *)arg1;
1680 if ((p = pfind((pid_t)name[0])) == NULL)
1681 return (ESRCH);
1682 if (p->p_flag & P_WEXIT) {
1683 PROC_UNLOCK(p);
1684 return (ESRCH);
1685 }
1686 if ((error = p_candebug(curthread, p))) {
1687 PROC_UNLOCK(p);
1688 return (error);
1689 }
1690 _PHOLD(p);
1691 PROC_UNLOCK(p);
1692 vm = vmspace_acquire_ref(p);
1693 if (vm == NULL) {
1694 PRELE(p);
1695 return (ESRCH);
1696 }
1697 kve = malloc(sizeof(*kve), M_TEMP, M_WAITOK);
1698
1699 map = &vm->vm_map; /* XXXRW: More locking required? */
1700 vm_map_lock_read(map);
1701 for (entry = map->header.next; entry != &map->header;
1702 entry = entry->next) {
1703 vm_object_t obj, tobj, lobj;
1704 vm_offset_t addr;
1705 int vfslocked;
1706
1707 if (entry->eflags & MAP_ENTRY_IS_SUB_MAP)
1708 continue;
1709
1710 bzero(kve, sizeof(*kve));
1711
1712 kve->kve_private_resident = 0;
1713 obj = entry->object.vm_object;
1714 if (obj != NULL) {
1715 VM_OBJECT_LOCK(obj);
1716 if (obj->shadow_count == 1)
1717 kve->kve_private_resident =
1718 obj->resident_page_count;
1719 }
1720 kve->kve_resident = 0;
1721 addr = entry->start;
1722 while (addr < entry->end) {
1723 if (pmap_extract(map->pmap, addr))
1724 kve->kve_resident++;
1725 addr += PAGE_SIZE;
1726 }
1727
1728 for (lobj = tobj = obj; tobj; tobj = tobj->backing_object) {
1729 if (tobj != obj)
1730 VM_OBJECT_LOCK(tobj);
1731 if (lobj != obj)
1732 VM_OBJECT_UNLOCK(lobj);
1733 lobj = tobj;
1734 }
1735
1736 kve->kve_start = entry->start;
1737 kve->kve_end = entry->end;
1738 kve->kve_offset = entry->offset;
1739
1740 if (entry->protection & VM_PROT_READ)
1741 kve->kve_protection |= KVME_PROT_READ;
1742 if (entry->protection & VM_PROT_WRITE)
1743 kve->kve_protection |= KVME_PROT_WRITE;
1744 if (entry->protection & VM_PROT_EXECUTE)
1745 kve->kve_protection |= KVME_PROT_EXEC;
1746
1747 if (entry->eflags & MAP_ENTRY_COW)
1748 kve->kve_flags |= KVME_FLAG_COW;
1749 if (entry->eflags & MAP_ENTRY_NEEDS_COPY)
1750 kve->kve_flags |= KVME_FLAG_NEEDS_COPY;
1751 if (entry->eflags & MAP_ENTRY_NOCOREDUMP)
1752 kve->kve_flags |= KVME_FLAG_NOCOREDUMP;
1753
1754 last_timestamp = map->timestamp;
1755 vm_map_unlock_read(map);
1756
1757 kve->kve_fileid = 0;
1758 kve->kve_fsid = 0;
1759 freepath = NULL;
1760 fullpath = "";
1761 if (lobj) {
1762 vp = NULL;
1763 switch (lobj->type) {
1764 case OBJT_DEFAULT:
1765 kve->kve_type = KVME_TYPE_DEFAULT;
1766 break;
1767 case OBJT_VNODE:
1768 kve->kve_type = KVME_TYPE_VNODE;
1769 vp = lobj->handle;
1770 vref(vp);
1771 break;
1772 case OBJT_SWAP:
1773 kve->kve_type = KVME_TYPE_SWAP;
1774 break;
1775 case OBJT_DEVICE:
1776 kve->kve_type = KVME_TYPE_DEVICE;
1777 break;
1778 case OBJT_PHYS:
1779 kve->kve_type = KVME_TYPE_PHYS;
1780 break;
1781 case OBJT_DEAD:
1782 kve->kve_type = KVME_TYPE_DEAD;
1783 break;
1784 case OBJT_SG:
1785 kve->kve_type = KVME_TYPE_SG;
1786 break;
1787 default:
1788 kve->kve_type = KVME_TYPE_UNKNOWN;
1789 break;
1790 }
1791 if (lobj != obj)
1792 VM_OBJECT_UNLOCK(lobj);
1793
1794 kve->kve_ref_count = obj->ref_count;
1795 kve->kve_shadow_count = obj->shadow_count;
1796 VM_OBJECT_UNLOCK(obj);
1797 if (vp != NULL) {
1798 vn_fullpath(curthread, vp, &fullpath,
1799 &freepath);
1800 cred = curthread->td_ucred;
1801 vfslocked = VFS_LOCK_GIANT(vp->v_mount);
1802 vn_lock(vp, LK_SHARED | LK_RETRY);
1803 if (VOP_GETATTR(vp, &va, cred) == 0) {
1804 kve->kve_fileid = va.va_fileid;
1805 kve->kve_fsid = va.va_fsid;
1806 }
1807 vput(vp);
1808 VFS_UNLOCK_GIANT(vfslocked);
1809 }
1810 } else {
1811 kve->kve_type = KVME_TYPE_NONE;
1812 kve->kve_ref_count = 0;
1813 kve->kve_shadow_count = 0;
1814 }
1815
1816 strlcpy(kve->kve_path, fullpath, sizeof(kve->kve_path));
1817 if (freepath != NULL)
1818 free(freepath, M_TEMP);
1819
1820 /* Pack record size down */
1821 kve->kve_structsize = offsetof(struct kinfo_vmentry, kve_path) +
1822 strlen(kve->kve_path) + 1;
1823 kve->kve_structsize = roundup(kve->kve_structsize,
1824 sizeof(uint64_t));
1825 error = SYSCTL_OUT(req, kve, kve->kve_structsize);
1826 vm_map_lock_read(map);
1827 if (error)
1828 break;
1829 if (last_timestamp != map->timestamp) {
1830 vm_map_lookup_entry(map, addr - 1, &tmp_entry);
1831 entry = tmp_entry;
1832 }
1833 }
1834 vm_map_unlock_read(map);
1835 vmspace_free(vm);
1836 PRELE(p);
1837 free(kve, M_TEMP);
1838 return (error);
1839 }
1840
1841 #if defined(STACK) || defined(DDB)
1842 static int
1843 sysctl_kern_proc_kstack(SYSCTL_HANDLER_ARGS)
1844 {
1845 struct kinfo_kstack *kkstp;
1846 int error, i, *name, numthreads;
1847 lwpid_t *lwpidarray;
1848 struct thread *td;
1849 struct stack *st;
1850 struct sbuf sb;
1851 struct proc *p;
1852
1853 name = (int *)arg1;
1854 if ((p = pfind((pid_t)name[0])) == NULL)
1855 return (ESRCH);
1856 /* XXXRW: Not clear ESRCH is the right error during proc execve(). */
1857 if (p->p_flag & P_WEXIT || p->p_flag & P_INEXEC) {
1858 PROC_UNLOCK(p);
1859 return (ESRCH);
1860 }
1861 if ((error = p_candebug(curthread, p))) {
1862 PROC_UNLOCK(p);
1863 return (error);
1864 }
1865 _PHOLD(p);
1866 PROC_UNLOCK(p);
1867
1868 kkstp = malloc(sizeof(*kkstp), M_TEMP, M_WAITOK);
1869 st = stack_create();
1870
1871 lwpidarray = NULL;
1872 numthreads = 0;
1873 PROC_LOCK(p);
1874 repeat:
1875 if (numthreads < p->p_numthreads) {
1876 if (lwpidarray != NULL) {
1877 free(lwpidarray, M_TEMP);
1878 lwpidarray = NULL;
1879 }
1880 numthreads = p->p_numthreads;
1881 PROC_UNLOCK(p);
1882 lwpidarray = malloc(sizeof(*lwpidarray) * numthreads, M_TEMP,
1883 M_WAITOK | M_ZERO);
1884 PROC_LOCK(p);
1885 goto repeat;
1886 }
1887 i = 0;
1888
1889 /*
1890 * XXXRW: During the below loop, execve(2) and countless other sorts
1891 * of changes could have taken place. Should we check to see if the
1892 * vmspace has been replaced, or the like, in order to prevent
1893 * giving a snapshot that spans, say, execve(2), with some threads
1894 * before and some after? Among other things, the credentials could
1895 * have changed, in which case the right to extract debug info might
1896 * no longer be assured.
1897 */
1898 FOREACH_THREAD_IN_PROC(p, td) {
1899 KASSERT(i < numthreads,
1900 ("sysctl_kern_proc_kstack: numthreads"));
1901 lwpidarray[i] = td->td_tid;
1902 i++;
1903 }
1904 numthreads = i;
1905 for (i = 0; i < numthreads; i++) {
1906 td = thread_find(p, lwpidarray[i]);
1907 if (td == NULL) {
1908 continue;
1909 }
1910 bzero(kkstp, sizeof(*kkstp));
1911 (void)sbuf_new(&sb, kkstp->kkst_trace,
1912 sizeof(kkstp->kkst_trace), SBUF_FIXEDLEN);
1913 thread_lock(td);
1914 kkstp->kkst_tid = td->td_tid;
1915 if (TD_IS_SWAPPED(td))
1916 kkstp->kkst_state = KKST_STATE_SWAPPED;
1917 else if (TD_IS_RUNNING(td))
1918 kkstp->kkst_state = KKST_STATE_RUNNING;
1919 else {
1920 kkstp->kkst_state = KKST_STATE_STACKOK;
1921 stack_save_td(st, td);
1922 }
1923 thread_unlock(td);
1924 PROC_UNLOCK(p);
1925 stack_sbuf_print(&sb, st);
1926 sbuf_finish(&sb);
1927 sbuf_delete(&sb);
1928 error = SYSCTL_OUT(req, kkstp, sizeof(*kkstp));
1929 PROC_LOCK(p);
1930 if (error)
1931 break;
1932 }
1933 _PRELE(p);
1934 PROC_UNLOCK(p);
1935 if (lwpidarray != NULL)
1936 free(lwpidarray, M_TEMP);
1937 stack_destroy(st);
1938 free(kkstp, M_TEMP);
1939 return (error);
1940 }
1941 #endif
1942
1943 /*
1944 * This sysctl allows a process to retrieve the full list of groups from
1945 * itself or another process.
1946 */
1947 static int
1948 sysctl_kern_proc_groups(SYSCTL_HANDLER_ARGS)
1949 {
1950 pid_t *pidp = (pid_t *)arg1;
1951 unsigned int arglen = arg2;
1952 struct proc *p;
1953 struct ucred *cred;
1954 int error;
1955
1956 if (arglen != 1)
1957 return (EINVAL);
1958 if (*pidp == -1) { /* -1 means this process */
1959 p = req->td->td_proc;
1960 } else {
1961 p = pfind(*pidp);
1962 if (p == NULL)
1963 return (ESRCH);
1964 if ((error = p_cansee(curthread, p)) != 0) {
1965 PROC_UNLOCK(p);
1966 return (error);
1967 }
1968 }
1969
1970 cred = crhold(p->p_ucred);
1971 if (*pidp != -1)
1972 PROC_UNLOCK(p);
1973
1974 error = SYSCTL_OUT(req, cred->cr_groups,
1975 cred->cr_ngroups * sizeof(gid_t));
1976 crfree(cred);
1977 return (error);
1978 }
1979
1980 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
1981
1982 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT|
1983 CTLFLAG_MPSAFE, 0, 0, sysctl_kern_proc, "S,proc",
1984 "Return entire process table");
1985
1986 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1987 sysctl_kern_proc, "Process table");
1988
1989 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD | CTLFLAG_MPSAFE,
1990 sysctl_kern_proc, "Process table");
1991
1992 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD | CTLFLAG_MPSAFE,
1993 sysctl_kern_proc, "Process table");
1994
1995 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD |
1996 CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
1997
1998 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD | CTLFLAG_MPSAFE,
1999 sysctl_kern_proc, "Process table");
2000
2001 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2002 sysctl_kern_proc, "Process table");
2003
2004 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2005 sysctl_kern_proc, "Process table");
2006
2007 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD | CTLFLAG_MPSAFE,
2008 sysctl_kern_proc, "Process table");
2009
2010 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD | CTLFLAG_MPSAFE,
2011 sysctl_kern_proc, "Return process table, no threads");
2012
2013 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
2014 CTLFLAG_RW | CTLFLAG_ANYBODY | CTLFLAG_MPSAFE,
2015 sysctl_kern_proc_args, "Process argument list");
2016
2017 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD |
2018 CTLFLAG_MPSAFE, sysctl_kern_proc_pathname, "Process executable path");
2019
2020 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD |
2021 CTLFLAG_MPSAFE, sysctl_kern_proc_sv_name,
2022 "Process syscall vector name (ABI type)");
2023
2024 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
2025 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2026
2027 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
2028 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2029
2030 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
2031 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2032
2033 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
2034 sid_td, CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2035
2036 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
2037 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2038
2039 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
2040 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2041
2042 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
2043 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2044
2045 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
2046 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc, "Process table");
2047
2048 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
2049 CTLFLAG_RD | CTLFLAG_MPSAFE, sysctl_kern_proc,
2050 "Return process table, no threads");
2051
2052 #ifdef COMPAT_FREEBSD7
2053 static SYSCTL_NODE(_kern_proc, KERN_PROC_OVMMAP, ovmmap, CTLFLAG_RD |
2054 CTLFLAG_MPSAFE, sysctl_kern_proc_ovmmap, "Old Process vm map entries");
2055 #endif
2056
2057 static SYSCTL_NODE(_kern_proc, KERN_PROC_VMMAP, vmmap, CTLFLAG_RD |
2058 CTLFLAG_MPSAFE, sysctl_kern_proc_vmmap, "Process vm map entries");
2059
2060 #if defined(STACK) || defined(DDB)
2061 static SYSCTL_NODE(_kern_proc, KERN_PROC_KSTACK, kstack, CTLFLAG_RD |
2062 CTLFLAG_MPSAFE, sysctl_kern_proc_kstack, "Process kernel stacks");
2063 #endif
2064
2065 static SYSCTL_NODE(_kern_proc, KERN_PROC_GROUPS, groups, CTLFLAG_RD |
2066 CTLFLAG_MPSAFE, sysctl_kern_proc_groups, "Process groups");
Cache object: 3d536afa2f8edfc31f8798b17742ce2c
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