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 * $FreeBSD$ 31 */ 32 33 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include "opt_ktrace.h" 37 #include "opt_kstack_pages.h" 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/lock.h> 43 #include <sys/malloc.h> 44 #include <sys/mutex.h> 45 #include <sys/proc.h> 46 #include <sys/refcount.h> 47 #include <sys/sysent.h> 48 #include <sys/sched.h> 49 #include <sys/smp.h> 50 #include <sys/sysctl.h> 51 #include <sys/filedesc.h> 52 #include <sys/tty.h> 53 #include <sys/signalvar.h> 54 #include <sys/sx.h> 55 #include <sys/user.h> 56 #include <sys/jail.h> 57 #include <sys/vnode.h> 58 #ifdef KTRACE 59 #include <sys/uio.h> 60 #include <sys/ktrace.h> 61 #endif 62 63 #include <vm/vm.h> 64 #include <vm/vm_extern.h> 65 #include <vm/pmap.h> 66 #include <vm/vm_map.h> 67 #include <vm/uma.h> 68 69 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header"); 70 MALLOC_DEFINE(M_SESSION, "session", "session header"); 71 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures"); 72 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures"); 73 74 static void doenterpgrp(struct proc *, struct pgrp *); 75 static void orphanpg(struct pgrp *pg); 76 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp); 77 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp); 78 static void pgadjustjobc(struct pgrp *pgrp, int entering); 79 static void pgdelete(struct pgrp *); 80 static int proc_ctor(void *mem, int size, void *arg, int flags); 81 static void proc_dtor(void *mem, int size, void *arg); 82 static int proc_init(void *mem, int size, int flags); 83 static void proc_fini(void *mem, int size); 84 85 /* 86 * Other process lists 87 */ 88 struct pidhashhead *pidhashtbl; 89 u_long pidhash; 90 struct pgrphashhead *pgrphashtbl; 91 u_long pgrphash; 92 struct proclist allproc; 93 struct proclist zombproc; 94 struct sx allproc_lock; 95 struct sx proctree_lock; 96 struct mtx ppeers_lock; 97 uma_zone_t proc_zone; 98 uma_zone_t ithread_zone; 99 100 int kstack_pages = KSTACK_PAGES; 101 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0, ""); 102 103 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE); 104 105 /* 106 * Initialize global process hashing structures. 107 */ 108 void 109 procinit() 110 { 111 112 sx_init(&allproc_lock, "allproc"); 113 sx_init(&proctree_lock, "proctree"); 114 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF); 115 LIST_INIT(&allproc); 116 LIST_INIT(&zombproc); 117 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash); 118 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash); 119 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(), 120 proc_ctor, proc_dtor, proc_init, proc_fini, 121 UMA_ALIGN_PTR, UMA_ZONE_NOFREE); 122 uihashinit(); 123 } 124 125 /* 126 * Prepare a proc for use. 127 */ 128 static int 129 proc_ctor(void *mem, int size, void *arg, int flags) 130 { 131 struct proc *p; 132 133 p = (struct proc *)mem; 134 return (0); 135 } 136 137 /* 138 * Reclaim a proc after use. 139 */ 140 static void 141 proc_dtor(void *mem, int size, void *arg) 142 { 143 struct proc *p; 144 struct thread *td; 145 #ifdef INVARIANTS 146 struct ksegrp *kg; 147 #endif 148 149 /* INVARIANTS checks go here */ 150 p = (struct proc *)mem; 151 td = FIRST_THREAD_IN_PROC(p); 152 #ifdef INVARIANTS 153 KASSERT((p->p_numthreads == 1), 154 ("bad number of threads in exiting process")); 155 KASSERT((p->p_numksegrps == 1), ("free proc with > 1 ksegrp")); 156 KASSERT((td != NULL), ("proc_dtor: bad thread pointer")); 157 kg = FIRST_KSEGRP_IN_PROC(p); 158 KASSERT((kg != NULL), ("proc_dtor: bad kg pointer")); 159 #endif 160 161 /* Dispose of an alternate kstack, if it exists. 162 * XXX What if there are more than one thread in the proc? 163 * The first thread in the proc is special and not 164 * freed, so you gotta do this here. 165 */ 166 if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0)) 167 vm_thread_dispose_altkstack(td); 168 } 169 170 /* 171 * Initialize type-stable parts of a proc (when newly created). 172 */ 173 static int 174 proc_init(void *mem, int size, int flags) 175 { 176 struct proc *p; 177 struct thread *td; 178 struct ksegrp *kg; 179 180 p = (struct proc *)mem; 181 p->p_sched = (struct p_sched *)&p[1]; 182 td = thread_alloc(); 183 kg = ksegrp_alloc(); 184 bzero(&p->p_mtx, sizeof(struct mtx)); 185 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK); 186 p->p_stats = pstats_alloc(); 187 proc_linkup(p, kg, td); 188 sched_newproc(p, kg, td); 189 return (0); 190 } 191 192 /* 193 * UMA should ensure that this function is never called. 194 * Freeing a proc structure would violate type stability. 195 */ 196 static void 197 proc_fini(void *mem, int size) 198 { 199 200 panic("proc reclaimed"); 201 } 202 203 /* 204 * Is p an inferior of the current process? 205 */ 206 int 207 inferior(p) 208 register struct proc *p; 209 { 210 211 sx_assert(&proctree_lock, SX_LOCKED); 212 for (; p != curproc; p = p->p_pptr) 213 if (p->p_pid == 0) 214 return (0); 215 return (1); 216 } 217 218 /* 219 * Locate a process by number; return only "live" processes -- i.e., neither 220 * zombies nor newly born but incompletely initialized processes. By not 221 * returning processes in the PRS_NEW state, we allow callers to avoid 222 * testing for that condition to avoid dereferencing p_ucred, et al. 223 */ 224 struct proc * 225 pfind(pid) 226 register pid_t pid; 227 { 228 register struct proc *p; 229 230 sx_slock(&allproc_lock); 231 LIST_FOREACH(p, PIDHASH(pid), p_hash) 232 if (p->p_pid == pid) { 233 if (p->p_state == PRS_NEW) { 234 p = NULL; 235 break; 236 } 237 PROC_LOCK(p); 238 break; 239 } 240 sx_sunlock(&allproc_lock); 241 return (p); 242 } 243 244 /* 245 * Locate a process group by number. 246 * The caller must hold proctree_lock. 247 */ 248 struct pgrp * 249 pgfind(pgid) 250 register pid_t pgid; 251 { 252 register struct pgrp *pgrp; 253 254 sx_assert(&proctree_lock, SX_LOCKED); 255 256 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) { 257 if (pgrp->pg_id == pgid) { 258 PGRP_LOCK(pgrp); 259 return (pgrp); 260 } 261 } 262 return (NULL); 263 } 264 265 /* 266 * Create a new process group. 267 * pgid must be equal to the pid of p. 268 * Begin a new session if required. 269 */ 270 int 271 enterpgrp(p, pgid, pgrp, sess) 272 register struct proc *p; 273 pid_t pgid; 274 struct pgrp *pgrp; 275 struct session *sess; 276 { 277 struct pgrp *pgrp2; 278 279 sx_assert(&proctree_lock, SX_XLOCKED); 280 281 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL")); 282 KASSERT(p->p_pid == pgid, 283 ("enterpgrp: new pgrp and pid != pgid")); 284 285 pgrp2 = pgfind(pgid); 286 287 KASSERT(pgrp2 == NULL, 288 ("enterpgrp: pgrp with pgid exists")); 289 KASSERT(!SESS_LEADER(p), 290 ("enterpgrp: session leader attempted setpgrp")); 291 292 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK); 293 294 if (sess != NULL) { 295 /* 296 * new session 297 */ 298 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF); 299 PROC_LOCK(p); 300 p->p_flag &= ~P_CONTROLT; 301 PROC_UNLOCK(p); 302 PGRP_LOCK(pgrp); 303 sess->s_leader = p; 304 sess->s_sid = p->p_pid; 305 sess->s_count = 1; 306 sess->s_ttyvp = NULL; 307 sess->s_ttyp = NULL; 308 bcopy(p->p_session->s_login, sess->s_login, 309 sizeof(sess->s_login)); 310 pgrp->pg_session = sess; 311 KASSERT(p == curproc, 312 ("enterpgrp: mksession and p != curproc")); 313 } else { 314 pgrp->pg_session = p->p_session; 315 SESS_LOCK(pgrp->pg_session); 316 pgrp->pg_session->s_count++; 317 SESS_UNLOCK(pgrp->pg_session); 318 PGRP_LOCK(pgrp); 319 } 320 pgrp->pg_id = pgid; 321 LIST_INIT(&pgrp->pg_members); 322 323 /* 324 * As we have an exclusive lock of proctree_lock, 325 * this should not deadlock. 326 */ 327 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash); 328 pgrp->pg_jobc = 0; 329 SLIST_INIT(&pgrp->pg_sigiolst); 330 PGRP_UNLOCK(pgrp); 331 332 doenterpgrp(p, pgrp); 333 334 return (0); 335 } 336 337 /* 338 * Move p to an existing process group 339 */ 340 int 341 enterthispgrp(p, pgrp) 342 register struct proc *p; 343 struct pgrp *pgrp; 344 { 345 346 sx_assert(&proctree_lock, SX_XLOCKED); 347 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 348 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 349 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 350 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 351 KASSERT(pgrp->pg_session == p->p_session, 352 ("%s: pgrp's session %p, p->p_session %p.\n", 353 __func__, 354 pgrp->pg_session, 355 p->p_session)); 356 KASSERT(pgrp != p->p_pgrp, 357 ("%s: p belongs to pgrp.", __func__)); 358 359 doenterpgrp(p, pgrp); 360 361 return (0); 362 } 363 364 /* 365 * Move p to a process group 366 */ 367 static void 368 doenterpgrp(p, pgrp) 369 struct proc *p; 370 struct pgrp *pgrp; 371 { 372 struct pgrp *savepgrp; 373 374 sx_assert(&proctree_lock, SX_XLOCKED); 375 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 376 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 377 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED); 378 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED); 379 380 savepgrp = p->p_pgrp; 381 382 /* 383 * Adjust eligibility of affected pgrps to participate in job control. 384 * Increment eligibility counts before decrementing, otherwise we 385 * could reach 0 spuriously during the first call. 386 */ 387 fixjobc(p, pgrp, 1); 388 fixjobc(p, p->p_pgrp, 0); 389 390 PGRP_LOCK(pgrp); 391 PGRP_LOCK(savepgrp); 392 PROC_LOCK(p); 393 LIST_REMOVE(p, p_pglist); 394 p->p_pgrp = pgrp; 395 PROC_UNLOCK(p); 396 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist); 397 PGRP_UNLOCK(savepgrp); 398 PGRP_UNLOCK(pgrp); 399 if (LIST_EMPTY(&savepgrp->pg_members)) 400 pgdelete(savepgrp); 401 } 402 403 /* 404 * remove process from process group 405 */ 406 int 407 leavepgrp(p) 408 register struct proc *p; 409 { 410 struct pgrp *savepgrp; 411 412 sx_assert(&proctree_lock, SX_XLOCKED); 413 savepgrp = p->p_pgrp; 414 PGRP_LOCK(savepgrp); 415 PROC_LOCK(p); 416 LIST_REMOVE(p, p_pglist); 417 p->p_pgrp = NULL; 418 PROC_UNLOCK(p); 419 PGRP_UNLOCK(savepgrp); 420 if (LIST_EMPTY(&savepgrp->pg_members)) 421 pgdelete(savepgrp); 422 return (0); 423 } 424 425 /* 426 * delete a process group 427 */ 428 static void 429 pgdelete(pgrp) 430 register struct pgrp *pgrp; 431 { 432 struct session *savesess; 433 434 sx_assert(&proctree_lock, SX_XLOCKED); 435 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 436 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 437 438 /* 439 * Reset any sigio structures pointing to us as a result of 440 * F_SETOWN with our pgid. 441 */ 442 funsetownlst(&pgrp->pg_sigiolst); 443 444 PGRP_LOCK(pgrp); 445 if (pgrp->pg_session->s_ttyp != NULL && 446 pgrp->pg_session->s_ttyp->t_pgrp == pgrp) 447 pgrp->pg_session->s_ttyp->t_pgrp = NULL; 448 LIST_REMOVE(pgrp, pg_hash); 449 savesess = pgrp->pg_session; 450 SESSRELE(savesess); 451 PGRP_UNLOCK(pgrp); 452 mtx_destroy(&pgrp->pg_mtx); 453 FREE(pgrp, M_PGRP); 454 } 455 456 static void 457 pgadjustjobc(pgrp, entering) 458 struct pgrp *pgrp; 459 int entering; 460 { 461 462 PGRP_LOCK(pgrp); 463 if (entering) 464 pgrp->pg_jobc++; 465 else { 466 --pgrp->pg_jobc; 467 if (pgrp->pg_jobc == 0) 468 orphanpg(pgrp); 469 } 470 PGRP_UNLOCK(pgrp); 471 } 472 473 /* 474 * Adjust pgrp jobc counters when specified process changes process group. 475 * We count the number of processes in each process group that "qualify" 476 * the group for terminal job control (those with a parent in a different 477 * process group of the same session). If that count reaches zero, the 478 * process group becomes orphaned. Check both the specified process' 479 * process group and that of its children. 480 * entering == 0 => p is leaving specified group. 481 * entering == 1 => p is entering specified group. 482 */ 483 void 484 fixjobc(p, pgrp, entering) 485 register struct proc *p; 486 register struct pgrp *pgrp; 487 int entering; 488 { 489 register struct pgrp *hispgrp; 490 register struct session *mysession; 491 492 sx_assert(&proctree_lock, SX_LOCKED); 493 PROC_LOCK_ASSERT(p, MA_NOTOWNED); 494 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED); 495 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED); 496 497 /* 498 * Check p's parent to see whether p qualifies its own process 499 * group; if so, adjust count for p's process group. 500 */ 501 mysession = pgrp->pg_session; 502 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp && 503 hispgrp->pg_session == mysession) 504 pgadjustjobc(pgrp, entering); 505 506 /* 507 * Check this process' children to see whether they qualify 508 * their process groups; if so, adjust counts for children's 509 * process groups. 510 */ 511 LIST_FOREACH(p, &p->p_children, p_sibling) { 512 hispgrp = p->p_pgrp; 513 if (hispgrp == pgrp || 514 hispgrp->pg_session != mysession) 515 continue; 516 PROC_LOCK(p); 517 if (p->p_state == PRS_ZOMBIE) { 518 PROC_UNLOCK(p); 519 continue; 520 } 521 PROC_UNLOCK(p); 522 pgadjustjobc(hispgrp, entering); 523 } 524 } 525 526 /* 527 * A process group has become orphaned; 528 * if there are any stopped processes in the group, 529 * hang-up all process in that group. 530 */ 531 static void 532 orphanpg(pg) 533 struct pgrp *pg; 534 { 535 register struct proc *p; 536 537 PGRP_LOCK_ASSERT(pg, MA_OWNED); 538 539 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 540 PROC_LOCK(p); 541 if (P_SHOULDSTOP(p)) { 542 PROC_UNLOCK(p); 543 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 544 PROC_LOCK(p); 545 psignal(p, SIGHUP); 546 psignal(p, SIGCONT); 547 PROC_UNLOCK(p); 548 } 549 return; 550 } 551 PROC_UNLOCK(p); 552 } 553 } 554 555 void 556 sessrele(struct session *s) 557 { 558 int i; 559 560 SESS_LOCK(s); 561 i = --s->s_count; 562 SESS_UNLOCK(s); 563 if (i == 0) { 564 if (s->s_ttyp != NULL) 565 ttyrel(s->s_ttyp); 566 mtx_destroy(&s->s_mtx); 567 FREE(s, M_SESSION); 568 } 569 } 570 571 #include "opt_ddb.h" 572 #ifdef DDB 573 #include <ddb/ddb.h> 574 575 DB_SHOW_COMMAND(pgrpdump, pgrpdump) 576 { 577 register struct pgrp *pgrp; 578 register struct proc *p; 579 register int i; 580 581 for (i = 0; i <= pgrphash; i++) { 582 if (!LIST_EMPTY(&pgrphashtbl[i])) { 583 printf("\tindx %d\n", i); 584 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) { 585 printf( 586 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n", 587 (void *)pgrp, (long)pgrp->pg_id, 588 (void *)pgrp->pg_session, 589 pgrp->pg_session->s_count, 590 (void *)LIST_FIRST(&pgrp->pg_members)); 591 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) { 592 printf("\t\tpid %ld addr %p pgrp %p\n", 593 (long)p->p_pid, (void *)p, 594 (void *)p->p_pgrp); 595 } 596 } 597 } 598 } 599 } 600 #endif /* DDB */ 601 602 /* 603 * Clear kinfo_proc and fill in any information that is common 604 * to all threads in the process. 605 * Must be called with the target process locked. 606 */ 607 static void 608 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp) 609 { 610 struct thread *td0; 611 struct tty *tp; 612 struct session *sp; 613 struct timeval tv; 614 struct ucred *cred; 615 struct sigacts *ps; 616 617 bzero(kp, sizeof(*kp)); 618 619 kp->ki_structsize = sizeof(*kp); 620 kp->ki_paddr = p; 621 PROC_LOCK_ASSERT(p, MA_OWNED); 622 kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */ 623 kp->ki_args = p->p_args; 624 kp->ki_textvp = p->p_textvp; 625 #ifdef KTRACE 626 kp->ki_tracep = p->p_tracevp; 627 mtx_lock(&ktrace_mtx); 628 kp->ki_traceflag = p->p_traceflag; 629 mtx_unlock(&ktrace_mtx); 630 #endif 631 kp->ki_fd = p->p_fd; 632 kp->ki_vmspace = p->p_vmspace; 633 kp->ki_flag = p->p_flag; 634 cred = p->p_ucred; 635 if (cred) { 636 kp->ki_uid = cred->cr_uid; 637 kp->ki_ruid = cred->cr_ruid; 638 kp->ki_svuid = cred->cr_svuid; 639 /* XXX bde doesn't like KI_NGROUPS */ 640 kp->ki_ngroups = min(cred->cr_ngroups, KI_NGROUPS); 641 bcopy(cred->cr_groups, kp->ki_groups, 642 kp->ki_ngroups * sizeof(gid_t)); 643 kp->ki_rgid = cred->cr_rgid; 644 kp->ki_svgid = cred->cr_svgid; 645 /* If jailed(cred), emulate the old P_JAILED flag. */ 646 if (jailed(cred)) { 647 kp->ki_flag |= P_JAILED; 648 /* If inside a jail, use 0 as a jail ID. */ 649 if (!jailed(curthread->td_ucred)) 650 kp->ki_jid = cred->cr_prison->pr_id; 651 } 652 } 653 ps = p->p_sigacts; 654 if (ps) { 655 mtx_lock(&ps->ps_mtx); 656 kp->ki_sigignore = ps->ps_sigignore; 657 kp->ki_sigcatch = ps->ps_sigcatch; 658 mtx_unlock(&ps->ps_mtx); 659 } 660 mtx_lock_spin(&sched_lock); 661 if (p->p_state != PRS_NEW && 662 p->p_state != PRS_ZOMBIE && 663 p->p_vmspace != NULL) { 664 struct vmspace *vm = p->p_vmspace; 665 666 kp->ki_size = vm->vm_map.size; 667 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/ 668 FOREACH_THREAD_IN_PROC(p, td0) { 669 if (!TD_IS_SWAPPED(td0)) 670 kp->ki_rssize += td0->td_kstack_pages; 671 if (td0->td_altkstack_obj != NULL) 672 kp->ki_rssize += td0->td_altkstack_pages; 673 } 674 kp->ki_swrss = vm->vm_swrss; 675 kp->ki_tsize = vm->vm_tsize; 676 kp->ki_dsize = vm->vm_dsize; 677 kp->ki_ssize = vm->vm_ssize; 678 } else if (p->p_state == PRS_ZOMBIE) 679 kp->ki_stat = SZOMB; 680 kp->ki_sflag = p->p_sflag; 681 kp->ki_swtime = p->p_swtime; 682 kp->ki_pid = p->p_pid; 683 kp->ki_nice = p->p_nice; 684 bintime2timeval(&p->p_rux.rux_runtime, &tv); 685 kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec; 686 mtx_unlock_spin(&sched_lock); 687 if ((p->p_sflag & PS_INMEM) && p->p_stats != NULL) { 688 kp->ki_start = p->p_stats->p_start; 689 timevaladd(&kp->ki_start, &boottime); 690 kp->ki_rusage = p->p_stats->p_ru; 691 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime); 692 calccru(p, &kp->ki_childutime, &kp->ki_childstime); 693 694 /* Some callers want child-times in a single value */ 695 kp->ki_childtime = kp->ki_childstime; 696 timevaladd(&kp->ki_childtime, &kp->ki_childutime); 697 } 698 tp = NULL; 699 if (p->p_pgrp) { 700 kp->ki_pgid = p->p_pgrp->pg_id; 701 kp->ki_jobc = p->p_pgrp->pg_jobc; 702 sp = p->p_pgrp->pg_session; 703 704 if (sp != NULL) { 705 kp->ki_sid = sp->s_sid; 706 SESS_LOCK(sp); 707 strlcpy(kp->ki_login, sp->s_login, 708 sizeof(kp->ki_login)); 709 if (sp->s_ttyvp) 710 kp->ki_kiflag |= KI_CTTY; 711 if (SESS_LEADER(p)) 712 kp->ki_kiflag |= KI_SLEADER; 713 tp = sp->s_ttyp; 714 SESS_UNLOCK(sp); 715 } 716 } 717 if ((p->p_flag & P_CONTROLT) && tp != NULL) { 718 kp->ki_tdev = dev2udev(tp->t_dev); 719 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 720 if (tp->t_session) 721 kp->ki_tsid = tp->t_session->s_sid; 722 } else 723 kp->ki_tdev = NODEV; 724 if (p->p_comm[0] != '\0') { 725 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm)); 726 strlcpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm)); 727 } 728 if (p->p_sysent && p->p_sysent->sv_name != NULL && 729 p->p_sysent->sv_name[0] != '\0') 730 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul)); 731 kp->ki_siglist = p->p_siglist; 732 kp->ki_xstat = p->p_xstat; 733 kp->ki_acflag = p->p_acflag; 734 kp->ki_lock = p->p_lock; 735 if (p->p_pptr) 736 kp->ki_ppid = p->p_pptr->p_pid; 737 } 738 739 /* 740 * Fill in information that is thread specific. 741 * Must be called with sched_lock locked. 742 */ 743 static void 744 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp) 745 { 746 struct ksegrp *kg; 747 struct proc *p; 748 749 p = td->td_proc; 750 751 if (td->td_wmesg != NULL) 752 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg)); 753 else 754 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg)); 755 if (TD_ON_LOCK(td)) { 756 kp->ki_kiflag |= KI_LOCKBLOCK; 757 strlcpy(kp->ki_lockname, td->td_lockname, 758 sizeof(kp->ki_lockname)); 759 } else { 760 kp->ki_kiflag &= ~KI_LOCKBLOCK; 761 bzero(kp->ki_lockname, sizeof(kp->ki_lockname)); 762 } 763 764 if (p->p_state == PRS_NORMAL) { /* XXXKSE very approximate */ 765 if (TD_ON_RUNQ(td) || 766 TD_CAN_RUN(td) || 767 TD_IS_RUNNING(td)) { 768 kp->ki_stat = SRUN; 769 } else if (P_SHOULDSTOP(p)) { 770 kp->ki_stat = SSTOP; 771 } else if (TD_IS_SLEEPING(td)) { 772 kp->ki_stat = SSLEEP; 773 } else if (TD_ON_LOCK(td)) { 774 kp->ki_stat = SLOCK; 775 } else { 776 kp->ki_stat = SWAIT; 777 } 778 } else { 779 kp->ki_stat = SIDL; 780 } 781 782 kg = td->td_ksegrp; 783 784 /* things in the KSE GROUP */ 785 kp->ki_estcpu = kg->kg_estcpu; 786 kp->ki_slptime = kg->kg_slptime; 787 kp->ki_pri.pri_user = kg->kg_user_pri; 788 kp->ki_pri.pri_class = kg->kg_pri_class; 789 790 /* Things in the thread */ 791 kp->ki_wchan = td->td_wchan; 792 kp->ki_pri.pri_level = td->td_priority; 793 kp->ki_pri.pri_native = td->td_base_pri; 794 kp->ki_lastcpu = td->td_lastcpu; 795 kp->ki_oncpu = td->td_oncpu; 796 kp->ki_tdflags = td->td_flags; 797 kp->ki_tid = td->td_tid; 798 kp->ki_numthreads = p->p_numthreads; 799 kp->ki_pcb = td->td_pcb; 800 kp->ki_kstack = (void *)td->td_kstack; 801 kp->ki_pctcpu = sched_pctcpu(td); 802 803 /* We can't get this anymore but ps etc never used it anyway. */ 804 kp->ki_rqindex = 0; 805 806 SIGSETOR(kp->ki_siglist, td->td_siglist); 807 kp->ki_sigmask = td->td_sigmask; 808 } 809 810 /* 811 * Fill in a kinfo_proc structure for the specified process. 812 * Must be called with the target process locked. 813 */ 814 void 815 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp) 816 { 817 818 fill_kinfo_proc_only(p, kp); 819 mtx_lock_spin(&sched_lock); 820 if (FIRST_THREAD_IN_PROC(p) != NULL) 821 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp); 822 mtx_unlock_spin(&sched_lock); 823 } 824 825 struct pstats * 826 pstats_alloc(void) 827 { 828 829 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK)); 830 } 831 832 /* 833 * Copy parts of p_stats; zero the rest of p_stats (statistics). 834 */ 835 void 836 pstats_fork(struct pstats *src, struct pstats *dst) 837 { 838 839 bzero(&dst->pstat_startzero, 840 __rangeof(struct pstats, pstat_startzero, pstat_endzero)); 841 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy, 842 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy)); 843 } 844 845 void 846 pstats_free(struct pstats *ps) 847 { 848 849 free(ps, M_SUBPROC); 850 } 851 852 /* 853 * Locate a zombie process by number 854 */ 855 struct proc * 856 zpfind(pid_t pid) 857 { 858 struct proc *p; 859 860 sx_slock(&allproc_lock); 861 LIST_FOREACH(p, &zombproc, p_list) 862 if (p->p_pid == pid) { 863 PROC_LOCK(p); 864 break; 865 } 866 sx_sunlock(&allproc_lock); 867 return (p); 868 } 869 870 #define KERN_PROC_ZOMBMASK 0x3 871 #define KERN_PROC_NOTHREADS 0x4 872 873 /* 874 * Must be called with the process locked and will return with it unlocked. 875 */ 876 static int 877 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags) 878 { 879 struct thread *td; 880 struct kinfo_proc kinfo_proc; 881 int error = 0; 882 struct proc *np; 883 pid_t pid = p->p_pid; 884 885 PROC_LOCK_ASSERT(p, MA_OWNED); 886 887 fill_kinfo_proc_only(p, &kinfo_proc); 888 if (flags & KERN_PROC_NOTHREADS) { 889 mtx_lock_spin(&sched_lock); 890 if (FIRST_THREAD_IN_PROC(p) != NULL) 891 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), &kinfo_proc); 892 mtx_unlock_spin(&sched_lock); 893 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 894 sizeof(kinfo_proc)); 895 } else { 896 mtx_lock_spin(&sched_lock); 897 if (FIRST_THREAD_IN_PROC(p) != NULL) 898 FOREACH_THREAD_IN_PROC(p, td) { 899 fill_kinfo_thread(td, &kinfo_proc); 900 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 901 sizeof(kinfo_proc)); 902 if (error) 903 break; 904 } 905 else 906 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc, 907 sizeof(kinfo_proc)); 908 mtx_unlock_spin(&sched_lock); 909 } 910 PROC_UNLOCK(p); 911 if (error) 912 return (error); 913 if (flags & KERN_PROC_ZOMBMASK) 914 np = zpfind(pid); 915 else { 916 if (pid == 0) 917 return (0); 918 np = pfind(pid); 919 } 920 if (np == NULL) 921 return EAGAIN; 922 if (np != p) { 923 PROC_UNLOCK(np); 924 return EAGAIN; 925 } 926 PROC_UNLOCK(np); 927 return (0); 928 } 929 930 static int 931 sysctl_kern_proc(SYSCTL_HANDLER_ARGS) 932 { 933 int *name = (int*) arg1; 934 u_int namelen = arg2; 935 struct proc *p; 936 int flags, doingzomb, oid_number; 937 int error = 0; 938 939 oid_number = oidp->oid_number; 940 if (oid_number != KERN_PROC_ALL && 941 (oid_number & KERN_PROC_INC_THREAD) == 0) 942 flags = KERN_PROC_NOTHREADS; 943 else { 944 flags = 0; 945 oid_number &= ~KERN_PROC_INC_THREAD; 946 } 947 if (oid_number == KERN_PROC_PID) { 948 if (namelen != 1) 949 return (EINVAL); 950 error = sysctl_wire_old_buffer(req, 0); 951 if (error) 952 return (error); 953 p = pfind((pid_t)name[0]); 954 if (!p) 955 return (ESRCH); 956 if ((error = p_cansee(curthread, p))) { 957 PROC_UNLOCK(p); 958 return (error); 959 } 960 error = sysctl_out_proc(p, req, flags); 961 return (error); 962 } 963 964 switch (oid_number) { 965 case KERN_PROC_ALL: 966 if (namelen != 0) 967 return (EINVAL); 968 break; 969 case KERN_PROC_PROC: 970 if (namelen != 0 && namelen != 1) 971 return (EINVAL); 972 break; 973 default: 974 if (namelen != 1) 975 return (EINVAL); 976 break; 977 } 978 979 if (!req->oldptr) { 980 /* overestimate by 5 procs */ 981 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5); 982 if (error) 983 return (error); 984 } 985 error = sysctl_wire_old_buffer(req, 0); 986 if (error != 0) 987 return (error); 988 sx_slock(&allproc_lock); 989 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) { 990 if (!doingzomb) 991 p = LIST_FIRST(&allproc); 992 else 993 p = LIST_FIRST(&zombproc); 994 for (; p != 0; p = LIST_NEXT(p, p_list)) { 995 /* 996 * Skip embryonic processes. 997 */ 998 mtx_lock_spin(&sched_lock); 999 if (p->p_state == PRS_NEW) { 1000 mtx_unlock_spin(&sched_lock); 1001 continue; 1002 } 1003 mtx_unlock_spin(&sched_lock); 1004 PROC_LOCK(p); 1005 /* 1006 * Show a user only appropriate processes. 1007 */ 1008 if (p_cansee(curthread, p)) { 1009 PROC_UNLOCK(p); 1010 continue; 1011 } 1012 /* 1013 * TODO - make more efficient (see notes below). 1014 * do by session. 1015 */ 1016 switch (oid_number) { 1017 1018 case KERN_PROC_GID: 1019 if (p->p_ucred == NULL || 1020 p->p_ucred->cr_gid != (gid_t)name[0]) { 1021 PROC_UNLOCK(p); 1022 continue; 1023 } 1024 break; 1025 1026 case KERN_PROC_PGRP: 1027 /* could do this by traversing pgrp */ 1028 if (p->p_pgrp == NULL || 1029 p->p_pgrp->pg_id != (pid_t)name[0]) { 1030 PROC_UNLOCK(p); 1031 continue; 1032 } 1033 break; 1034 1035 case KERN_PROC_RGID: 1036 if (p->p_ucred == NULL || 1037 p->p_ucred->cr_rgid != (gid_t)name[0]) { 1038 PROC_UNLOCK(p); 1039 continue; 1040 } 1041 break; 1042 1043 case KERN_PROC_SESSION: 1044 if (p->p_session == NULL || 1045 p->p_session->s_sid != (pid_t)name[0]) { 1046 PROC_UNLOCK(p); 1047 continue; 1048 } 1049 break; 1050 1051 case KERN_PROC_TTY: 1052 if ((p->p_flag & P_CONTROLT) == 0 || 1053 p->p_session == NULL) { 1054 PROC_UNLOCK(p); 1055 continue; 1056 } 1057 SESS_LOCK(p->p_session); 1058 if (p->p_session->s_ttyp == NULL || 1059 dev2udev(p->p_session->s_ttyp->t_dev) != 1060 (dev_t)name[0]) { 1061 SESS_UNLOCK(p->p_session); 1062 PROC_UNLOCK(p); 1063 continue; 1064 } 1065 SESS_UNLOCK(p->p_session); 1066 break; 1067 1068 case KERN_PROC_UID: 1069 if (p->p_ucred == NULL || 1070 p->p_ucred->cr_uid != (uid_t)name[0]) { 1071 PROC_UNLOCK(p); 1072 continue; 1073 } 1074 break; 1075 1076 case KERN_PROC_RUID: 1077 if (p->p_ucred == NULL || 1078 p->p_ucred->cr_ruid != (uid_t)name[0]) { 1079 PROC_UNLOCK(p); 1080 continue; 1081 } 1082 break; 1083 1084 case KERN_PROC_PROC: 1085 break; 1086 1087 default: 1088 break; 1089 1090 } 1091 1092 error = sysctl_out_proc(p, req, flags | doingzomb); 1093 if (error) { 1094 sx_sunlock(&allproc_lock); 1095 return (error); 1096 } 1097 } 1098 } 1099 sx_sunlock(&allproc_lock); 1100 return (0); 1101 } 1102 1103 struct pargs * 1104 pargs_alloc(int len) 1105 { 1106 struct pargs *pa; 1107 1108 MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS, 1109 M_WAITOK); 1110 refcount_init(&pa->ar_ref, 1); 1111 pa->ar_length = len; 1112 return (pa); 1113 } 1114 1115 void 1116 pargs_free(struct pargs *pa) 1117 { 1118 1119 FREE(pa, M_PARGS); 1120 } 1121 1122 void 1123 pargs_hold(struct pargs *pa) 1124 { 1125 1126 if (pa == NULL) 1127 return; 1128 refcount_acquire(&pa->ar_ref); 1129 } 1130 1131 void 1132 pargs_drop(struct pargs *pa) 1133 { 1134 1135 if (pa == NULL) 1136 return; 1137 if (refcount_release(&pa->ar_ref)) 1138 pargs_free(pa); 1139 } 1140 1141 /* 1142 * This sysctl allows a process to retrieve the argument list or process 1143 * title for another process without groping around in the address space 1144 * of the other process. It also allow a process to set its own "process 1145 * title to a string of its own choice. 1146 */ 1147 static int 1148 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS) 1149 { 1150 int *name = (int*) arg1; 1151 u_int namelen = arg2; 1152 struct pargs *newpa, *pa; 1153 struct proc *p; 1154 int error = 0; 1155 1156 if (namelen != 1) 1157 return (EINVAL); 1158 1159 p = pfind((pid_t)name[0]); 1160 if (!p) 1161 return (ESRCH); 1162 1163 if ((error = p_cansee(curthread, p)) != 0) { 1164 PROC_UNLOCK(p); 1165 return (error); 1166 } 1167 1168 if (req->newptr && curproc != p) { 1169 PROC_UNLOCK(p); 1170 return (EPERM); 1171 } 1172 1173 pa = p->p_args; 1174 pargs_hold(pa); 1175 PROC_UNLOCK(p); 1176 if (req->oldptr != NULL && pa != NULL) 1177 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length); 1178 pargs_drop(pa); 1179 if (error != 0 || req->newptr == NULL) 1180 return (error); 1181 1182 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit) 1183 return (ENOMEM); 1184 newpa = pargs_alloc(req->newlen); 1185 error = SYSCTL_IN(req, newpa->ar_args, req->newlen); 1186 if (error != 0) { 1187 pargs_free(newpa); 1188 return (error); 1189 } 1190 PROC_LOCK(p); 1191 pa = p->p_args; 1192 p->p_args = newpa; 1193 PROC_UNLOCK(p); 1194 pargs_drop(pa); 1195 return (0); 1196 } 1197 1198 /* 1199 * This sysctl allows a process to retrieve the path of the executable for 1200 * itself or another process. 1201 */ 1202 static int 1203 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS) 1204 { 1205 pid_t *pidp = (pid_t *)arg1; 1206 unsigned int arglen = arg2; 1207 struct proc *p; 1208 struct vnode *vp; 1209 char *retbuf, *freebuf; 1210 int error; 1211 1212 if (arglen != 1) 1213 return (EINVAL); 1214 if (*pidp == -1) { /* -1 means this process */ 1215 p = req->td->td_proc; 1216 } else { 1217 p = pfind(*pidp); 1218 if (p == NULL) 1219 return (ESRCH); 1220 if ((error = p_cansee(curthread, p)) != 0) { 1221 PROC_UNLOCK(p); 1222 return (error); 1223 } 1224 } 1225 1226 vp = p->p_textvp; 1227 vref(vp); 1228 if (*pidp != -1) 1229 PROC_UNLOCK(p); 1230 error = vn_fullpath(req->td, vp, &retbuf, &freebuf); 1231 vrele(vp); 1232 if (error) 1233 return (error); 1234 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1); 1235 free(freebuf, M_TEMP); 1236 return (error); 1237 } 1238 1239 static int 1240 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS) 1241 { 1242 struct proc *p; 1243 char *sv_name; 1244 int *name; 1245 int namelen; 1246 int error; 1247 1248 namelen = arg2; 1249 if (namelen != 1) 1250 return (EINVAL); 1251 1252 name = (int *)arg1; 1253 if ((p = pfind((pid_t)name[0])) == NULL) 1254 return (ESRCH); 1255 if ((error = p_cansee(curthread, p))) { 1256 PROC_UNLOCK(p); 1257 return (error); 1258 } 1259 sv_name = p->p_sysent->sv_name; 1260 PROC_UNLOCK(p); 1261 return (sysctl_handle_string(oidp, sv_name, 0, req)); 1262 } 1263 1264 1265 static SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table"); 1266 1267 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT, 1268 0, 0, sysctl_kern_proc, "S,proc", "Return entire process table"); 1269 1270 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD, 1271 sysctl_kern_proc, "Process table"); 1272 1273 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD, 1274 sysctl_kern_proc, "Process table"); 1275 1276 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD, 1277 sysctl_kern_proc, "Process table"); 1278 1279 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD, 1280 sysctl_kern_proc, "Process table"); 1281 1282 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD, 1283 sysctl_kern_proc, "Process table"); 1284 1285 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD, 1286 sysctl_kern_proc, "Process table"); 1287 1288 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD, 1289 sysctl_kern_proc, "Process table"); 1290 1291 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD, 1292 sysctl_kern_proc, "Process table"); 1293 1294 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD, 1295 sysctl_kern_proc, "Return process table, no threads"); 1296 1297 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, 1298 CTLFLAG_RW | CTLFLAG_ANYBODY, 1299 sysctl_kern_proc_args, "Process argument list"); 1300 1301 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD, 1302 sysctl_kern_proc_pathname, "Process executable path"); 1303 1304 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD, 1305 sysctl_kern_proc_sv_name, "Process syscall vector name (ABI type)"); 1306 1307 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td, 1308 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1309 1310 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td, 1311 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1312 1313 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td, 1314 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1315 1316 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD), 1317 sid_td, CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1318 1319 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td, 1320 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1321 1322 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td, 1323 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1324 1325 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td, 1326 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1327 1328 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td, 1329 CTLFLAG_RD, sysctl_kern_proc, "Process table"); 1330 1331 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td, 1332 CTLFLAG_RD, sysctl_kern_proc, "Return process table, no threads"); 1333