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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95 34 * $FreeBSD: src/sys/kern/kern_proc.c,v 1.63.2.9 2003/05/08 07:47:16 kbyanc Exp $ 35 * $DragonFly: src/sys/kern/kern_proc.c,v 1.17 2004/09/13 16:22:36 dillon Exp $ 36 */ 37 38 #include <sys/param.h> 39 #include <sys/systm.h> 40 #include <sys/kernel.h> 41 #include <sys/sysctl.h> 42 #include <sys/malloc.h> 43 #include <sys/proc.h> 44 #include <sys/filedesc.h> 45 #include <sys/tty.h> 46 #include <sys/signalvar.h> 47 #include <vm/vm.h> 48 #include <sys/lock.h> 49 #include <vm/pmap.h> 50 #include <vm/vm_map.h> 51 #include <sys/user.h> 52 #include <vm/vm_zone.h> 53 #include <machine/smp.h> 54 55 static MALLOC_DEFINE(M_PGRP, "pgrp", "process group header"); 56 MALLOC_DEFINE(M_SESSION, "session", "session header"); 57 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures"); 58 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures"); 59 60 int ps_showallprocs = 1; 61 static int ps_showallthreads = 1; 62 SYSCTL_INT(_kern, OID_AUTO, ps_showallprocs, CTLFLAG_RW, 63 &ps_showallprocs, 0, ""); 64 SYSCTL_INT(_kern, OID_AUTO, ps_showallthreads, CTLFLAG_RW, 65 &ps_showallthreads, 0, ""); 66 67 static void pgdelete (struct pgrp *); 68 69 static void orphanpg (struct pgrp *pg); 70 71 /* 72 * Other process lists 73 */ 74 struct pidhashhead *pidhashtbl; 75 u_long pidhash; 76 struct pgrphashhead *pgrphashtbl; 77 u_long pgrphash; 78 struct proclist allproc; 79 struct proclist zombproc; 80 vm_zone_t proc_zone; 81 vm_zone_t thread_zone; 82 83 /* 84 * Initialize global process hashing structures. 85 */ 86 void 87 procinit() 88 { 89 90 LIST_INIT(&allproc); 91 LIST_INIT(&zombproc); 92 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash); 93 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash); 94 proc_zone = zinit("PROC", sizeof (struct proc), 0, 0, 5); 95 thread_zone = zinit("THREAD", sizeof (struct thread), 0, 0, 5); 96 uihashinit(); 97 } 98 99 /* 100 * Is p an inferior of the current process? 101 */ 102 int 103 inferior(p) 104 struct proc *p; 105 { 106 107 for (; p != curproc; p = p->p_pptr) 108 if (p->p_pid == 0) 109 return (0); 110 return (1); 111 } 112 113 /* 114 * Locate a process by number 115 */ 116 struct proc * 117 pfind(pid) 118 pid_t pid; 119 { 120 struct proc *p; 121 122 LIST_FOREACH(p, PIDHASH(pid), p_hash) 123 if (p->p_pid == pid) 124 return (p); 125 return (NULL); 126 } 127 128 /* 129 * Locate a process group by number 130 */ 131 struct pgrp * 132 pgfind(pgid) 133 pid_t pgid; 134 { 135 struct pgrp *pgrp; 136 137 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) 138 if (pgrp->pg_id == pgid) 139 return (pgrp); 140 return (NULL); 141 } 142 143 /* 144 * Move p to a new or existing process group (and session) 145 */ 146 int 147 enterpgrp(p, pgid, mksess) 148 struct proc *p; 149 pid_t pgid; 150 int mksess; 151 { 152 struct pgrp *pgrp = pgfind(pgid); 153 154 KASSERT(pgrp == NULL || !mksess, 155 ("enterpgrp: setsid into non-empty pgrp")); 156 KASSERT(!SESS_LEADER(p), 157 ("enterpgrp: session leader attempted setpgrp")); 158 159 if (pgrp == NULL) { 160 pid_t savepid = p->p_pid; 161 struct proc *np; 162 /* 163 * new process group 164 */ 165 KASSERT(p->p_pid == pgid, 166 ("enterpgrp: new pgrp and pid != pgid")); 167 if ((np = pfind(savepid)) == NULL || np != p) 168 return (ESRCH); 169 MALLOC(pgrp, struct pgrp *, sizeof(struct pgrp), M_PGRP, 170 M_WAITOK); 171 if (mksess) { 172 struct session *sess; 173 174 /* 175 * new session 176 */ 177 MALLOC(sess, struct session *, sizeof(struct session), 178 M_SESSION, M_WAITOK); 179 sess->s_leader = p; 180 sess->s_sid = p->p_pid; 181 sess->s_count = 1; 182 sess->s_ttyvp = NULL; 183 sess->s_ttyp = NULL; 184 bcopy(p->p_session->s_login, sess->s_login, 185 sizeof(sess->s_login)); 186 p->p_flag &= ~P_CONTROLT; 187 pgrp->pg_session = sess; 188 KASSERT(p == curproc, 189 ("enterpgrp: mksession and p != curproc")); 190 } else { 191 pgrp->pg_session = p->p_session; 192 sess_hold(pgrp->pg_session); 193 } 194 pgrp->pg_id = pgid; 195 LIST_INIT(&pgrp->pg_members); 196 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash); 197 pgrp->pg_jobc = 0; 198 SLIST_INIT(&pgrp->pg_sigiolst); 199 } else if (pgrp == p->p_pgrp) 200 return (0); 201 202 /* 203 * Adjust eligibility of affected pgrps to participate in job control. 204 * Increment eligibility counts before decrementing, otherwise we 205 * could reach 0 spuriously during the first call. 206 */ 207 fixjobc(p, pgrp, 1); 208 fixjobc(p, p->p_pgrp, 0); 209 210 LIST_REMOVE(p, p_pglist); 211 if (LIST_EMPTY(&p->p_pgrp->pg_members)) 212 pgdelete(p->p_pgrp); 213 p->p_pgrp = pgrp; 214 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist); 215 return (0); 216 } 217 218 /* 219 * remove process from process group 220 */ 221 int 222 leavepgrp(p) 223 struct proc *p; 224 { 225 226 LIST_REMOVE(p, p_pglist); 227 if (LIST_EMPTY(&p->p_pgrp->pg_members)) 228 pgdelete(p->p_pgrp); 229 p->p_pgrp = 0; 230 return (0); 231 } 232 233 /* 234 * delete a process group 235 */ 236 static void 237 pgdelete(pgrp) 238 struct pgrp *pgrp; 239 { 240 241 /* 242 * Reset any sigio structures pointing to us as a result of 243 * F_SETOWN with our pgid. 244 */ 245 funsetownlst(&pgrp->pg_sigiolst); 246 247 if (pgrp->pg_session->s_ttyp != NULL && 248 pgrp->pg_session->s_ttyp->t_pgrp == pgrp) 249 pgrp->pg_session->s_ttyp->t_pgrp = NULL; 250 LIST_REMOVE(pgrp, pg_hash); 251 sess_rele(pgrp->pg_session); 252 free(pgrp, M_PGRP); 253 } 254 255 /* 256 * Adjust the ref count on a session structure. When the ref count falls to 257 * zero the tty is disassociated from the session and the session structure 258 * is freed. Note that tty assocation is not itself ref-counted. 259 */ 260 void 261 sess_hold(struct session *sp) 262 { 263 ++sp->s_count; 264 } 265 266 void 267 sess_rele(struct session *sp) 268 { 269 KKASSERT(sp->s_count > 0); 270 if (--sp->s_count == 0) { 271 if (sp->s_ttyp && sp->s_ttyp->t_session) { 272 #ifdef TTY_DO_FULL_CLOSE 273 /* FULL CLOSE, see ttyclearsession() */ 274 KKASSERT(sp->s_ttyp->t_session == sp); 275 sp->s_ttyp->t_session = NULL; 276 #else 277 /* HALF CLOSE, see ttyclearsession() */ 278 if (sp->s_ttyp->t_session == sp) 279 sp->s_ttyp->t_session = NULL; 280 #endif 281 } 282 free(sp, M_SESSION); 283 } 284 } 285 286 /* 287 * Adjust pgrp jobc counters when specified process changes process group. 288 * We count the number of processes in each process group that "qualify" 289 * the group for terminal job control (those with a parent in a different 290 * process group of the same session). If that count reaches zero, the 291 * process group becomes orphaned. Check both the specified process' 292 * process group and that of its children. 293 * entering == 0 => p is leaving specified group. 294 * entering == 1 => p is entering specified group. 295 */ 296 void 297 fixjobc(p, pgrp, entering) 298 struct proc *p; 299 struct pgrp *pgrp; 300 int entering; 301 { 302 struct pgrp *hispgrp; 303 struct session *mysession = pgrp->pg_session; 304 305 /* 306 * Check p's parent to see whether p qualifies its own process 307 * group; if so, adjust count for p's process group. 308 */ 309 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp && 310 hispgrp->pg_session == mysession) { 311 if (entering) 312 pgrp->pg_jobc++; 313 else if (--pgrp->pg_jobc == 0) 314 orphanpg(pgrp); 315 } 316 317 /* 318 * Check this process' children to see whether they qualify 319 * their process groups; if so, adjust counts for children's 320 * process groups. 321 */ 322 LIST_FOREACH(p, &p->p_children, p_sibling) 323 if ((hispgrp = p->p_pgrp) != pgrp && 324 hispgrp->pg_session == mysession && 325 p->p_stat != SZOMB) { 326 if (entering) 327 hispgrp->pg_jobc++; 328 else if (--hispgrp->pg_jobc == 0) 329 orphanpg(hispgrp); 330 } 331 } 332 333 /* 334 * A process group has become orphaned; 335 * if there are any stopped processes in the group, 336 * hang-up all process in that group. 337 */ 338 static void 339 orphanpg(pg) 340 struct pgrp *pg; 341 { 342 struct proc *p; 343 344 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 345 if (p->p_stat == SSTOP) { 346 LIST_FOREACH(p, &pg->pg_members, p_pglist) { 347 psignal(p, SIGHUP); 348 psignal(p, SIGCONT); 349 } 350 return; 351 } 352 } 353 } 354 355 #include "opt_ddb.h" 356 #ifdef DDB 357 #include <ddb/ddb.h> 358 359 DB_SHOW_COMMAND(pgrpdump, pgrpdump) 360 { 361 struct pgrp *pgrp; 362 struct proc *p; 363 int i; 364 365 for (i = 0; i <= pgrphash; i++) { 366 if (!LIST_EMPTY(&pgrphashtbl[i])) { 367 printf("\tindx %d\n", i); 368 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) { 369 printf( 370 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n", 371 (void *)pgrp, (long)pgrp->pg_id, 372 (void *)pgrp->pg_session, 373 pgrp->pg_session->s_count, 374 (void *)LIST_FIRST(&pgrp->pg_members)); 375 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) { 376 printf("\t\tpid %ld addr %p pgrp %p\n", 377 (long)p->p_pid, (void *)p, 378 (void *)p->p_pgrp); 379 } 380 } 381 } 382 } 383 } 384 #endif /* DDB */ 385 386 /* 387 * Fill in an eproc structure for the specified thread. 388 */ 389 void 390 fill_eproc_td(thread_t td, struct eproc *ep, struct proc *xp) 391 { 392 bzero(ep, sizeof(*ep)); 393 394 ep->e_uticks = td->td_uticks; 395 ep->e_sticks = td->td_sticks; 396 ep->e_iticks = td->td_iticks; 397 ep->e_tdev = NOUDEV; 398 ep->e_cpuid = td->td_gd->gd_cpuid; 399 if (td->td_wmesg) { 400 strncpy(ep->e_wmesg, td->td_wmesg, WMESGLEN); 401 ep->e_wmesg[WMESGLEN] = 0; 402 } 403 404 /* 405 * Fake up portions of the proc structure copied out by the sysctl 406 * to return useful information. Note that using td_pri directly 407 * is messy because it includes critial section data so we fake 408 * up an rtprio.prio for threads. 409 */ 410 if (xp) { 411 *xp = *initproc; 412 xp->p_rtprio.type = RTP_PRIO_THREAD; 413 xp->p_rtprio.prio = td->td_pri & TDPRI_MASK; 414 xp->p_pid = -1; 415 } 416 } 417 418 /* 419 * Fill in an eproc structure for the specified process. 420 */ 421 void 422 fill_eproc(struct proc *p, struct eproc *ep) 423 { 424 struct tty *tp; 425 426 fill_eproc_td(p->p_thread, ep, NULL); 427 428 ep->e_paddr = p; 429 if (p->p_ucred) { 430 ep->e_ucred = *p->p_ucred; 431 } 432 if (p->p_procsig) { 433 ep->e_procsig = *p->p_procsig; 434 } 435 if (p->p_stat != SIDL && p->p_stat != SZOMB && p->p_vmspace != NULL) { 436 struct vmspace *vm = p->p_vmspace; 437 ep->e_vm = *vm; 438 ep->e_vm.vm_rssize = vmspace_resident_count(vm); /*XXX*/ 439 } 440 if ((p->p_flag & P_INMEM) && p->p_stats) 441 ep->e_stats = *p->p_stats; 442 if (p->p_pptr) 443 ep->e_ppid = p->p_pptr->p_pid; 444 if (p->p_pgrp) { 445 ep->e_pgid = p->p_pgrp->pg_id; 446 ep->e_jobc = p->p_pgrp->pg_jobc; 447 ep->e_sess = p->p_pgrp->pg_session; 448 449 if (ep->e_sess) { 450 bcopy(ep->e_sess->s_login, ep->e_login, sizeof(ep->e_login)); 451 if (ep->e_sess->s_ttyvp) 452 ep->e_flag = EPROC_CTTY; 453 if (p->p_session && SESS_LEADER(p)) 454 ep->e_flag |= EPROC_SLEADER; 455 } 456 } 457 if ((p->p_flag & P_CONTROLT) && 458 (ep->e_sess != NULL) && 459 ((tp = ep->e_sess->s_ttyp) != NULL)) { 460 ep->e_tdev = dev2udev(tp->t_dev); 461 ep->e_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID; 462 ep->e_tsess = tp->t_session; 463 } else { 464 ep->e_tdev = NOUDEV; 465 } 466 } 467 468 struct proc * 469 zpfind(pid_t pid) 470 { 471 struct proc *p; 472 473 LIST_FOREACH(p, &zombproc, p_list) 474 if (p->p_pid == pid) 475 return (p); 476 return (NULL); 477 } 478 479 static int 480 sysctl_out_proc(struct proc *p, struct thread *td, struct sysctl_req *req, int doingzomb) 481 { 482 struct eproc eproc; 483 struct proc xproc; 484 int error; 485 #if 0 486 pid_t pid = p->p_pid; 487 #endif 488 489 if (p) { 490 td = p->p_thread; 491 fill_eproc(p, &eproc); 492 xproc = *p; 493 494 /* 495 * Fixup p_stat from SRUN to SSLEEP if the LWKT thread is 496 * in a thread-blocked state. 497 * 498 * XXX temporary fix which might become permanent (I'd rather 499 * not pollute the thread scheduler with knowlege about 500 * processes). 501 */ 502 if (p->p_stat == SRUN && td && (td->td_flags & TDF_BLOCKED)) { 503 xproc.p_stat = SSLEEP; 504 } 505 } else if (td) { 506 fill_eproc_td(td, &eproc, &xproc); 507 } 508 error = SYSCTL_OUT(req,(caddr_t)&xproc, sizeof(struct proc)); 509 if (error) 510 return (error); 511 error = SYSCTL_OUT(req,(caddr_t)&eproc, sizeof(eproc)); 512 if (error) 513 return (error); 514 error = SYSCTL_OUT(req,(caddr_t)td, sizeof(struct thread)); 515 if (error) 516 return (error); 517 #if 0 518 if (!doingzomb && pid && (pfind(pid) != p)) 519 return EAGAIN; 520 if (doingzomb && zpfind(pid) != p) 521 return EAGAIN; 522 #endif 523 return (0); 524 } 525 526 static int 527 sysctl_kern_proc(SYSCTL_HANDLER_ARGS) 528 { 529 int *name = (int*) arg1; 530 u_int namelen = arg2; 531 struct proc *p; 532 struct thread *td; 533 int doingzomb; 534 int error = 0; 535 int n; 536 int origcpu; 537 struct ucred *cr1 = curproc->p_ucred; 538 539 if (oidp->oid_number == KERN_PROC_PID) { 540 if (namelen != 1) 541 return (EINVAL); 542 p = pfind((pid_t)name[0]); 543 if (!p) 544 return (0); 545 if (!PRISON_CHECK(cr1, p->p_ucred)) 546 return (0); 547 error = sysctl_out_proc(p, NULL, req, 0); 548 return (error); 549 } 550 if (oidp->oid_number == KERN_PROC_ALL && !namelen) 551 ; 552 else if (oidp->oid_number != KERN_PROC_ALL && namelen == 1) 553 ; 554 else 555 return (EINVAL); 556 557 if (!req->oldptr) { 558 /* overestimate by 5 procs */ 559 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5); 560 if (error) 561 return (error); 562 } 563 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) { 564 if (!doingzomb) 565 p = LIST_FIRST(&allproc); 566 else 567 p = LIST_FIRST(&zombproc); 568 for (; p != 0; p = LIST_NEXT(p, p_list)) { 569 /* 570 * Show a user only their processes. 571 */ 572 if ((!ps_showallprocs) && p_trespass(cr1, p->p_ucred)) 573 continue; 574 /* 575 * Skip embryonic processes. 576 */ 577 if (p->p_stat == SIDL) 578 continue; 579 /* 580 * TODO - make more efficient (see notes below). 581 * do by session. 582 */ 583 switch (oidp->oid_number) { 584 case KERN_PROC_PGRP: 585 /* could do this by traversing pgrp */ 586 if (p->p_pgrp == NULL || 587 p->p_pgrp->pg_id != (pid_t)name[0]) 588 continue; 589 break; 590 591 case KERN_PROC_TTY: 592 if ((p->p_flag & P_CONTROLT) == 0 || 593 p->p_session == NULL || 594 p->p_session->s_ttyp == NULL || 595 dev2udev(p->p_session->s_ttyp->t_dev) != 596 (udev_t)name[0]) 597 continue; 598 break; 599 600 case KERN_PROC_UID: 601 if (p->p_ucred == NULL || 602 p->p_ucred->cr_uid != (uid_t)name[0]) 603 continue; 604 break; 605 606 case KERN_PROC_RUID: 607 if (p->p_ucred == NULL || 608 p->p_ucred->cr_ruid != (uid_t)name[0]) 609 continue; 610 break; 611 } 612 613 if (!PRISON_CHECK(cr1, p->p_ucred)) 614 continue; 615 PHOLD(p); 616 error = sysctl_out_proc(p, NULL, req, doingzomb); 617 PRELE(p); 618 if (error) 619 return (error); 620 } 621 } 622 623 /* 624 * Iterate over all active cpus and scan their thread list. Start 625 * with the next logical cpu and end with our original cpu. We 626 * migrate our own thread to each target cpu in order to safely scan 627 * its thread list. In the last loop we migrate back to our original 628 * cpu. 629 */ 630 origcpu = mycpu->gd_cpuid; 631 for (n = 1; ps_showallthreads && n <= ncpus; ++n) { 632 globaldata_t rgd; 633 int nid; 634 635 nid = (origcpu + n) % ncpus; 636 if ((smp_active_mask & (1 << nid)) == 0) 637 continue; 638 rgd = globaldata_find(nid); 639 lwkt_setcpu_self(rgd); 640 cpu_mb1(); /* CURRENT CPU HAS CHANGED */ 641 642 TAILQ_FOREACH(td, &mycpu->gd_tdallq, td_allq) { 643 if (td->td_proc) 644 continue; 645 switch (oidp->oid_number) { 646 case KERN_PROC_PGRP: 647 case KERN_PROC_TTY: 648 case KERN_PROC_UID: 649 case KERN_PROC_RUID: 650 continue; 651 default: 652 break; 653 } 654 lwkt_hold(td); 655 error = sysctl_out_proc(NULL, td, req, doingzomb); 656 lwkt_rele(td); 657 if (error) 658 return (error); 659 } 660 } 661 return (0); 662 } 663 664 /* 665 * This sysctl allows a process to retrieve the argument list or process 666 * title for another process without groping around in the address space 667 * of the other process. It also allow a process to set its own "process 668 * title to a string of its own choice. 669 */ 670 static int 671 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS) 672 { 673 int *name = (int*) arg1; 674 u_int namelen = arg2; 675 struct proc *p; 676 struct pargs *pa; 677 int error = 0; 678 struct ucred *cr1 = curproc->p_ucred; 679 680 if (namelen != 1) 681 return (EINVAL); 682 683 p = pfind((pid_t)name[0]); 684 if (!p) 685 return (0); 686 687 if ((!ps_argsopen) && p_trespass(cr1, p->p_ucred)) 688 return (0); 689 690 if (req->newptr && curproc != p) 691 return (EPERM); 692 693 if (req->oldptr && p->p_args != NULL) 694 error = SYSCTL_OUT(req, p->p_args->ar_args, p->p_args->ar_length); 695 if (req->newptr == NULL) 696 return (error); 697 698 if (p->p_args && --p->p_args->ar_ref == 0) 699 FREE(p->p_args, M_PARGS); 700 p->p_args = NULL; 701 702 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit) 703 return (error); 704 705 MALLOC(pa, struct pargs *, sizeof(struct pargs) + req->newlen, 706 M_PARGS, M_WAITOK); 707 pa->ar_ref = 1; 708 pa->ar_length = req->newlen; 709 error = SYSCTL_IN(req, pa->ar_args, req->newlen); 710 if (!error) 711 p->p_args = pa; 712 else 713 FREE(pa, M_PARGS); 714 return (error); 715 } 716 717 SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table"); 718 719 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT, 720 0, 0, sysctl_kern_proc, "S,proc", "Return entire process table"); 721 722 SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD, 723 sysctl_kern_proc, "Process table"); 724 725 SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD, 726 sysctl_kern_proc, "Process table"); 727 728 SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD, 729 sysctl_kern_proc, "Process table"); 730 731 SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD, 732 sysctl_kern_proc, "Process table"); 733 734 SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD, 735 sysctl_kern_proc, "Process table"); 736 737 SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, CTLFLAG_RW | CTLFLAG_ANYBODY, 738 sysctl_kern_proc_args, "Process argument list"); 739