1 /* $OpenBSD: kern_proc.c,v 1.101 2024/10/22 11:54:04 claudio Exp $ */ 2 /* $NetBSD: kern_proc.c,v 1.14 1996/02/09 18:59:41 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1989, 1991, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)kern_proc.c 8.4 (Berkeley) 1/4/94 33 */ 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/proc.h> 38 #include <sys/wait.h> 39 #include <sys/rwlock.h> 40 #include <sys/malloc.h> 41 #include <sys/tty.h> 42 #include <sys/signalvar.h> 43 #include <sys/pool.h> 44 #include <sys/vnode.h> 45 46 /* 47 * Locks used to protect struct members in this file: 48 * I immutable after creation 49 * U uidinfolk 50 */ 51 52 struct rwlock uidinfolk; 53 #define UIHASH(uid) (&uihashtbl[(uid) & uihash]) 54 LIST_HEAD(uihashhead, uidinfo) *uihashtbl; /* [U] */ 55 u_long uihash; /* [I] size of hash table - 1 */ 56 57 /* 58 * Other process lists 59 */ 60 struct tidhashhead *tidhashtbl; 61 u_long tidhash; 62 struct pidhashhead *pidhashtbl; 63 u_long pidhash; 64 struct pgrphashhead *pgrphashtbl; 65 u_long pgrphash; 66 struct processlist allprocess; 67 struct processlist zombprocess; 68 struct proclist allproc; 69 70 struct pool proc_pool; 71 struct pool process_pool; 72 struct pool rusage_pool; 73 struct pool ucred_pool; 74 struct pool pgrp_pool; 75 struct pool session_pool; 76 77 void pgdelete(struct pgrp *); 78 void fixjobc(struct process *, struct pgrp *, int); 79 80 static void orphanpg(struct pgrp *); 81 #ifdef DEBUG 82 void pgrpdump(void); 83 #endif 84 85 /* 86 * Initialize global process hashing structures. 87 */ 88 void 89 procinit(void) 90 { 91 LIST_INIT(&allprocess); 92 LIST_INIT(&zombprocess); 93 LIST_INIT(&allproc); 94 95 rw_init(&uidinfolk, "uidinfo"); 96 97 tidhashtbl = hashinit(maxthread / 4, M_PROC, M_NOWAIT, &tidhash); 98 pidhashtbl = hashinit(maxprocess / 4, M_PROC, M_NOWAIT, &pidhash); 99 pgrphashtbl = hashinit(maxprocess / 4, M_PROC, M_NOWAIT, &pgrphash); 100 uihashtbl = hashinit(maxprocess / 16, M_PROC, M_NOWAIT, &uihash); 101 if (!tidhashtbl || !pidhashtbl || !pgrphashtbl || !uihashtbl) 102 panic("procinit: malloc"); 103 104 pool_init(&proc_pool, sizeof(struct proc), 0, IPL_NONE, 105 PR_WAITOK, "procpl", NULL); 106 pool_init(&process_pool, sizeof(struct process), 0, IPL_NONE, 107 PR_WAITOK, "processpl", NULL); 108 pool_init(&rusage_pool, sizeof(struct rusage), 0, IPL_NONE, 109 PR_WAITOK, "zombiepl", NULL); 110 pool_init(&ucred_pool, sizeof(struct ucred), 0, IPL_MPFLOOR, 111 0, "ucredpl", NULL); 112 pool_init(&pgrp_pool, sizeof(struct pgrp), 0, IPL_NONE, 113 PR_WAITOK, "pgrppl", NULL); 114 pool_init(&session_pool, sizeof(struct session), 0, IPL_NONE, 115 PR_WAITOK, "sessionpl", NULL); 116 } 117 118 /* 119 * This returns with `uidinfolk' held: caller must call uid_release() 120 * after making whatever change they needed. 121 */ 122 struct uidinfo * 123 uid_find(uid_t uid) 124 { 125 struct uidinfo *uip, *nuip; 126 struct uihashhead *uipp; 127 128 uipp = UIHASH(uid); 129 rw_enter_write(&uidinfolk); 130 LIST_FOREACH(uip, uipp, ui_hash) 131 if (uip->ui_uid == uid) 132 break; 133 if (uip) 134 return (uip); 135 rw_exit_write(&uidinfolk); 136 nuip = malloc(sizeof(*nuip), M_PROC, M_WAITOK|M_ZERO); 137 rw_enter_write(&uidinfolk); 138 LIST_FOREACH(uip, uipp, ui_hash) 139 if (uip->ui_uid == uid) 140 break; 141 if (uip) { 142 free(nuip, M_PROC, sizeof(*nuip)); 143 return (uip); 144 } 145 nuip->ui_uid = uid; 146 LIST_INSERT_HEAD(uipp, nuip, ui_hash); 147 148 return (nuip); 149 } 150 151 void 152 uid_release(struct uidinfo *uip) 153 { 154 rw_exit_write(&uidinfolk); 155 } 156 157 /* 158 * Change the count associated with number of threads 159 * a given user is using. 160 */ 161 int 162 chgproccnt(uid_t uid, int diff) 163 { 164 struct uidinfo *uip; 165 long count; 166 167 uip = uid_find(uid); 168 count = (uip->ui_proccnt += diff); 169 uid_release(uip); 170 if (count < 0) 171 panic("chgproccnt: procs < 0"); 172 return count; 173 } 174 175 /* 176 * Is pr an inferior of parent? 177 */ 178 int 179 inferior(struct process *pr, struct process *parent) 180 { 181 182 for (; pr != parent; pr = pr->ps_pptr) 183 if (pr->ps_pid == 0 || pr->ps_pid == 1) 184 return (0); 185 return (1); 186 } 187 188 /* 189 * Locate a proc (thread) by number 190 */ 191 struct proc * 192 tfind(pid_t tid) 193 { 194 struct proc *p; 195 196 LIST_FOREACH(p, TIDHASH(tid), p_hash) 197 if (p->p_tid == tid) 198 return (p); 199 return (NULL); 200 } 201 202 /* 203 * Locate a thread by userspace id, from a given process. 204 */ 205 struct proc * 206 tfind_user(pid_t tid, struct process *pr) 207 { 208 struct proc *p; 209 210 if (tid < THREAD_PID_OFFSET) 211 return NULL; 212 p = tfind(tid - THREAD_PID_OFFSET); 213 214 /* verify we found a thread in the correct process */ 215 if (p != NULL && p->p_p != pr) 216 p = NULL; 217 return p; 218 } 219 220 /* 221 * Locate a process by number 222 */ 223 struct process * 224 prfind(pid_t pid) 225 { 226 struct process *pr; 227 228 LIST_FOREACH(pr, PIDHASH(pid), ps_hash) 229 if (pr->ps_pid == pid) 230 return (pr); 231 return (NULL); 232 } 233 234 /* 235 * Locate a process group by number 236 */ 237 struct pgrp * 238 pgfind(pid_t pgid) 239 { 240 struct pgrp *pgrp; 241 242 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) 243 if (pgrp->pg_id == pgid) 244 return (pgrp); 245 return (NULL); 246 } 247 248 /* 249 * Locate a zombie process 250 */ 251 struct process * 252 zombiefind(pid_t pid) 253 { 254 struct process *pr; 255 256 LIST_FOREACH(pr, &zombprocess, ps_list) 257 if (pr->ps_pid == pid) 258 return (pr); 259 return (NULL); 260 } 261 262 /* 263 * Move process to a new process group. If a session is provided 264 * then it's a new session to contain this process group; otherwise 265 * the process is staying within its existing session. 266 */ 267 void 268 enternewpgrp(struct process *pr, struct pgrp *pgrp, struct session *newsess) 269 { 270 #ifdef DIAGNOSTIC 271 if (SESS_LEADER(pr)) 272 panic("%s: session leader attempted setpgrp", __func__); 273 #endif 274 275 if (newsess != NULL) { 276 /* 277 * New session. Initialize it completely 278 */ 279 timeout_set(&newsess->s_verauthto, zapverauth, newsess); 280 newsess->s_leader = pr; 281 newsess->s_count = 1; 282 newsess->s_ttyvp = NULL; 283 newsess->s_ttyp = NULL; 284 memcpy(newsess->s_login, pr->ps_session->s_login, 285 sizeof(newsess->s_login)); 286 atomic_clearbits_int(&pr->ps_flags, PS_CONTROLT); 287 pgrp->pg_session = newsess; 288 #ifdef DIAGNOSTIC 289 if (pr != curproc->p_p) 290 panic("%s: mksession but not curproc", __func__); 291 #endif 292 } else { 293 pgrp->pg_session = pr->ps_session; 294 pgrp->pg_session->s_count++; 295 } 296 pgrp->pg_id = pr->ps_pid; 297 LIST_INIT(&pgrp->pg_members); 298 LIST_INIT(&pgrp->pg_sigiolst); 299 LIST_INSERT_HEAD(PGRPHASH(pr->ps_pid), pgrp, pg_hash); 300 pgrp->pg_jobc = 0; 301 302 enterthispgrp(pr, pgrp); 303 } 304 305 /* 306 * move process to an existing process group 307 */ 308 void 309 enterthispgrp(struct process *pr, struct pgrp *pgrp) 310 { 311 struct pgrp *savepgrp = pr->ps_pgrp; 312 313 /* 314 * Adjust eligibility of affected pgrps to participate in job control. 315 * Increment eligibility counts before decrementing, otherwise we 316 * could reach 0 spuriously during the first call. 317 */ 318 fixjobc(pr, pgrp, 1); 319 fixjobc(pr, savepgrp, 0); 320 321 LIST_REMOVE(pr, ps_pglist); 322 mtx_enter(&pr->ps_mtx); 323 pr->ps_pgrp = pgrp; 324 mtx_leave(&pr->ps_mtx); 325 LIST_INSERT_HEAD(&pgrp->pg_members, pr, ps_pglist); 326 if (LIST_EMPTY(&savepgrp->pg_members)) 327 pgdelete(savepgrp); 328 } 329 330 /* 331 * remove process from process group 332 */ 333 void 334 leavepgrp(struct process *pr) 335 { 336 337 if (pr->ps_session->s_verauthppid == pr->ps_pid) 338 zapverauth(pr->ps_session); 339 LIST_REMOVE(pr, ps_pglist); 340 if (LIST_EMPTY(&pr->ps_pgrp->pg_members)) 341 pgdelete(pr->ps_pgrp); 342 mtx_enter(&pr->ps_mtx); 343 pr->ps_pgrp = NULL; 344 mtx_leave(&pr->ps_mtx); 345 } 346 347 /* 348 * delete a process group 349 */ 350 void 351 pgdelete(struct pgrp *pgrp) 352 { 353 sigio_freelist(&pgrp->pg_sigiolst); 354 355 if (pgrp->pg_session->s_ttyp != NULL && 356 pgrp->pg_session->s_ttyp->t_pgrp == pgrp) 357 pgrp->pg_session->s_ttyp->t_pgrp = NULL; 358 LIST_REMOVE(pgrp, pg_hash); 359 SESSRELE(pgrp->pg_session); 360 pool_put(&pgrp_pool, pgrp); 361 } 362 363 void 364 zapverauth(void *v) 365 { 366 struct session *sess = v; 367 sess->s_verauthuid = 0; 368 sess->s_verauthppid = 0; 369 } 370 371 /* 372 * Adjust pgrp jobc counters when specified process changes process group. 373 * We count the number of processes in each process group that "qualify" 374 * the group for terminal job control (those with a parent in a different 375 * process group of the same session). If that count reaches zero, the 376 * process group becomes orphaned. Check both the specified process' 377 * process group and that of its children. 378 * entering == 0 => pr is leaving specified group. 379 * entering == 1 => pr is entering specified group. 380 * XXX need proctree lock 381 */ 382 void 383 fixjobc(struct process *pr, struct pgrp *pgrp, int entering) 384 { 385 struct pgrp *hispgrp; 386 struct session *mysession = pgrp->pg_session; 387 388 /* 389 * Check pr's parent to see whether pr qualifies its own process 390 * group; if so, adjust count for pr's process group. 391 */ 392 if ((hispgrp = pr->ps_pptr->ps_pgrp) != pgrp && 393 hispgrp->pg_session == mysession) { 394 if (entering) 395 pgrp->pg_jobc++; 396 else if (--pgrp->pg_jobc == 0) 397 orphanpg(pgrp); 398 } 399 400 /* 401 * Check this process' children to see whether they qualify 402 * their process groups; if so, adjust counts for children's 403 * process groups. 404 */ 405 LIST_FOREACH(pr, &pr->ps_children, ps_sibling) 406 if ((hispgrp = pr->ps_pgrp) != pgrp && 407 hispgrp->pg_session == mysession && 408 (pr->ps_flags & PS_ZOMBIE) == 0) { 409 if (entering) 410 hispgrp->pg_jobc++; 411 else if (--hispgrp->pg_jobc == 0) 412 orphanpg(hispgrp); 413 } 414 } 415 416 void 417 killjobc(struct process *pr) 418 { 419 if (SESS_LEADER(pr)) { 420 struct session *sp = pr->ps_session; 421 422 if (sp->s_ttyvp) { 423 struct vnode *ovp; 424 425 /* 426 * Controlling process. 427 * Signal foreground pgrp, 428 * drain controlling terminal 429 * and revoke access to controlling terminal. 430 */ 431 if (sp->s_ttyp->t_session == sp) { 432 if (sp->s_ttyp->t_pgrp) 433 pgsignal(sp->s_ttyp->t_pgrp, SIGHUP, 1); 434 ttywait(sp->s_ttyp); 435 /* 436 * The tty could have been revoked 437 * if we blocked. 438 */ 439 if (sp->s_ttyvp) 440 VOP_REVOKE(sp->s_ttyvp, REVOKEALL); 441 } 442 ovp = sp->s_ttyvp; 443 sp->s_ttyvp = NULL; 444 if (ovp) 445 vrele(ovp); 446 /* 447 * s_ttyp is not zero'd; we use this to 448 * indicate that the session once had a 449 * controlling terminal. (for logging and 450 * informational purposes) 451 */ 452 } 453 sp->s_leader = NULL; 454 } 455 fixjobc(pr, pr->ps_pgrp, 0); 456 } 457 458 /* 459 * A process group has become orphaned; 460 * if there are any stopped processes in the group, 461 * hang-up all process in that group. 462 */ 463 static void 464 orphanpg(struct pgrp *pg) 465 { 466 struct process *pr; 467 468 LIST_FOREACH(pr, &pg->pg_members, ps_pglist) { 469 if (pr->ps_flags & PS_STOPPED) { 470 LIST_FOREACH(pr, &pg->pg_members, ps_pglist) { 471 prsignal(pr, SIGHUP); 472 prsignal(pr, SIGCONT); 473 } 474 return; 475 } 476 } 477 } 478 479 #ifdef DDB 480 void 481 proc_printit(struct proc *p, const char *modif, 482 int (*pr)(const char *, ...) __attribute__((__format__(__kprintf__,1,2)))) 483 { 484 static const char *const pstat[] = { 485 "idle", "run", "sleep", "stop", "zombie", "dead", "onproc" 486 }; 487 char pstbuf[5]; 488 const char *pst = pstbuf; 489 490 491 if (p->p_stat < 1 || p->p_stat > sizeof(pstat) / sizeof(pstat[0])) 492 snprintf(pstbuf, sizeof(pstbuf), "%d", p->p_stat); 493 else 494 pst = pstat[(int)p->p_stat - 1]; 495 496 (*pr)("PROC (%s) tid=%d pid=%d tcnt=%d stat=%s\n", p->p_p->ps_comm, 497 p->p_tid, p->p_p->ps_pid, p->p_p->ps_threadcnt, pst); 498 (*pr)(" flags process=%b proc=%b\n", 499 p->p_p->ps_flags, PS_BITS, p->p_flag, P_BITS); 500 (*pr)(" runpri=%u, usrpri=%u, slppri=%u, nice=%d\n", 501 p->p_runpri, p->p_usrpri, p->p_slppri, p->p_p->ps_nice); 502 (*pr)(" wchan=%p, wmesg=%s, ps_single=%p scnt=%d ecnt=%d\n", 503 p->p_wchan, (p->p_wchan && p->p_wmesg) ? p->p_wmesg : "", 504 p->p_p->ps_single, p->p_p->ps_singlecnt, p->p_p->ps_exitcnt); 505 (*pr)(" forw=%p, list=%p,%p\n", 506 TAILQ_NEXT(p, p_runq), p->p_list.le_next, p->p_list.le_prev); 507 (*pr)(" process=%p user=%p, vmspace=%p\n", 508 p->p_p, p->p_addr, p->p_vmspace); 509 (*pr)(" estcpu=%u, cpticks=%d, pctcpu=%u.%u, " 510 "user=%llu, sys=%llu, intr=%llu\n", 511 p->p_estcpu, p->p_cpticks, p->p_pctcpu / 100, p->p_pctcpu % 100, 512 p->p_tu.tu_uticks, p->p_tu.tu_sticks, p->p_tu.tu_iticks); 513 } 514 #include <machine/db_machdep.h> 515 516 #include <ddb/db_output.h> 517 518 void 519 db_kill_cmd(db_expr_t addr, int have_addr, db_expr_t count, char *modif) 520 { 521 struct process *pr; 522 struct proc *p; 523 524 pr = prfind(addr); 525 if (pr == NULL) { 526 db_printf("%ld: No such process", addr); 527 return; 528 } 529 530 p = TAILQ_FIRST(&pr->ps_threads); 531 532 /* Send uncatchable SIGABRT for coredump */ 533 sigabort(p); 534 } 535 536 void 537 db_show_all_procs(db_expr_t addr, int haddr, db_expr_t count, char *modif) 538 { 539 char *mode; 540 int skipzomb = 0; 541 int has_kernel_lock = 0; 542 struct proc *p; 543 struct process *pr, *ppr; 544 545 if (modif[0] == 0) 546 modif[0] = 'n'; /* default == normal mode */ 547 548 mode = "mawno"; 549 while (*mode && *mode != modif[0]) 550 mode++; 551 if (*mode == 0 || *mode == 'm') { 552 db_printf("usage: show all procs [/a] [/n] [/w]\n"); 553 db_printf("\t/a == show process address info\n"); 554 db_printf("\t/n == show normal process info [default]\n"); 555 db_printf("\t/w == show process pgrp/wait info\n"); 556 db_printf("\t/o == show normal info for non-idle SONPROC\n"); 557 return; 558 } 559 560 pr = LIST_FIRST(&allprocess); 561 562 switch (*mode) { 563 564 case 'a': 565 db_printf(" TID %-9s %18s %18s %18s\n", 566 "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP"); 567 break; 568 case 'n': 569 db_printf(" PID %6s %5s %5s S %10s %-12s %-15s\n", 570 "TID", "PPID", "UID", "FLAGS", "WAIT", "COMMAND"); 571 break; 572 case 'w': 573 db_printf(" TID %-15s %-5s %18s %s\n", 574 "COMMAND", "PGRP", "WAIT-CHANNEL", "WAIT-MSG"); 575 break; 576 case 'o': 577 skipzomb = 1; 578 db_printf(" TID %5s %5s %10s %10s %3s %-30s\n", 579 "PID", "UID", "PRFLAGS", "PFLAGS", "CPU", "COMMAND"); 580 break; 581 } 582 583 while (pr != NULL) { 584 ppr = pr->ps_pptr; 585 586 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 587 #ifdef MULTIPROCESSOR 588 if (__mp_lock_held(&kernel_lock, p->p_cpu)) 589 has_kernel_lock = 1; 590 else 591 has_kernel_lock = 0; 592 #endif 593 if (p->p_stat) { 594 if (*mode == 'o') { 595 if (p->p_stat != SONPROC) 596 continue; 597 if (p->p_cpu != NULL && p->p_cpu-> 598 ci_schedstate.spc_idleproc == p) 599 continue; 600 } 601 602 if (*mode == 'n') { 603 db_printf("%c%5d ", (p == curproc ? 604 '*' : ' '), pr->ps_pid); 605 } else { 606 db_printf("%c%6d ", (p == curproc ? 607 '*' : ' '), p->p_tid); 608 } 609 610 switch (*mode) { 611 612 case 'a': 613 db_printf("%-9.9s %18p %18p %18p\n", 614 pr->ps_comm, p, p->p_addr, p->p_vmspace); 615 break; 616 617 case 'n': 618 db_printf("%6d %5d %5d %d %#10x " 619 "%-12.12s %-15s\n", 620 p->p_tid, ppr ? ppr->ps_pid : -1, 621 pr->ps_ucred->cr_ruid, p->p_stat, 622 p->p_flag | pr->ps_flags, 623 (p->p_wchan && p->p_wmesg) ? 624 p->p_wmesg : "", pr->ps_comm); 625 break; 626 627 case 'w': 628 db_printf("%-15s %-5d %18p %s\n", 629 pr->ps_comm, (pr->ps_pgrp ? 630 pr->ps_pgrp->pg_id : -1), 631 p->p_wchan, 632 (p->p_wchan && p->p_wmesg) ? 633 p->p_wmesg : ""); 634 break; 635 636 case 'o': 637 db_printf("%5d %5d %#10x %#10x %3d" 638 "%c %-31s\n", 639 pr->ps_pid, pr->ps_ucred->cr_ruid, 640 pr->ps_flags, p->p_flag, 641 CPU_INFO_UNIT(p->p_cpu), 642 has_kernel_lock ? 'K' : ' ', 643 pr->ps_comm); 644 break; 645 646 } 647 } 648 } 649 pr = LIST_NEXT(pr, ps_list); 650 if (pr == NULL && skipzomb == 0) { 651 skipzomb = 1; 652 pr = LIST_FIRST(&zombprocess); 653 } 654 } 655 } 656 #endif 657 658 #ifdef DEBUG 659 void 660 pgrpdump(void) 661 { 662 struct pgrp *pgrp; 663 struct process *pr; 664 int i; 665 666 for (i = 0; i <= pgrphash; i++) { 667 if (!LIST_EMPTY(&pgrphashtbl[i])) { 668 printf("\tindx %d\n", i); 669 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) { 670 printf("\tpgrp %p, pgid %d, sess %p, sesscnt %d, mem %p\n", 671 pgrp, pgrp->pg_id, pgrp->pg_session, 672 pgrp->pg_session->s_count, 673 LIST_FIRST(&pgrp->pg_members)); 674 LIST_FOREACH(pr, &pgrp->pg_members, ps_pglist) { 675 printf("\t\tpid %d addr %p pgrp %p\n", 676 pr->ps_pid, pr, pr->ps_pgrp); 677 } 678 } 679 } 680 } 681 } 682 #endif /* DEBUG */ 683