1 /* $OpenBSD: init_main.c,v 1.183 2012/06/13 22:47:39 ariane Exp $ */ 2 /* $NetBSD: init_main.c,v 1.84.4.1 1996/06/02 09:08:06 mrg Exp $ */ 3 4 /* 5 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 6 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * (c) UNIX System Laboratories, Inc. 9 * All or some portions of this file are derived from material licensed 10 * to the University of California by American Telephone and Telegraph 11 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 12 * the permission of UNIX System Laboratories, Inc. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)init_main.c 8.9 (Berkeley) 1/21/94 39 */ 40 41 #include <sys/param.h> 42 #include <sys/core.h> 43 #include <sys/filedesc.h> 44 #include <sys/file.h> 45 #include <sys/errno.h> 46 #include <sys/exec.h> 47 #include <sys/kernel.h> 48 #include <sys/kthread.h> 49 #include <sys/mount.h> 50 #include <sys/proc.h> 51 #include <sys/resourcevar.h> 52 #include <sys/signalvar.h> 53 #include <sys/systm.h> 54 #include <sys/namei.h> 55 #include <sys/vnode.h> 56 #include <sys/tty.h> 57 #include <sys/conf.h> 58 #include <sys/buf.h> 59 #include <sys/device.h> 60 #include <sys/socketvar.h> 61 #include <sys/lockf.h> 62 #include <sys/protosw.h> 63 #include <sys/reboot.h> 64 #include <sys/user.h> 65 #ifdef SYSVSHM 66 #include <sys/shm.h> 67 #endif 68 #ifdef SYSVSEM 69 #include <sys/sem.h> 70 #endif 71 #ifdef SYSVMSG 72 #include <sys/msg.h> 73 #endif 74 #include <sys/domain.h> 75 #include <sys/mbuf.h> 76 #include <sys/pipe.h> 77 #include <sys/workq.h> 78 79 #include <sys/syscall.h> 80 #include <sys/syscallargs.h> 81 82 #include <dev/rndvar.h> 83 84 #include <ufs/ufs/quota.h> 85 86 #include <machine/cpu.h> 87 88 #include <uvm/uvm.h> 89 90 #include <net/if.h> 91 #include <net/raw_cb.h> 92 #include <net/netisr.h> 93 94 #if defined(CRYPTO) 95 #include <crypto/cryptodev.h> 96 #include <crypto/cryptosoft.h> 97 #endif 98 99 #if defined(NFSSERVER) || defined(NFSCLIENT) 100 extern void nfs_init(void); 101 #endif 102 103 #include "mpath.h" 104 #include "vscsi.h" 105 #include "softraid.h" 106 107 const char copyright[] = 108 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 109 "\tThe Regents of the University of California. All rights reserved.\n" 110 "Copyright (c) 1995-2012 OpenBSD. All rights reserved. http://www.OpenBSD.org\n"; 111 112 /* Components of the first process -- never freed. */ 113 struct session session0; 114 struct pgrp pgrp0; 115 struct proc proc0; 116 struct process process0; 117 struct pcred cred0; 118 struct plimit limit0; 119 struct vmspace vmspace0; 120 struct sigacts sigacts0; 121 struct proc *initproc; 122 struct proc *reaperproc; 123 124 int cmask = CMASK; 125 extern struct user *proc0paddr; 126 127 struct vnode *rootvp, *swapdev_vp; 128 int boothowto; 129 struct timeval boottime; 130 int ncpus = 1; 131 int ncpusfound = 1; /* number of cpus we find */ 132 __volatile int start_init_exec; /* semaphore for start_init() */ 133 134 #if !defined(NO_PROPOLICE) 135 long __guard[8]; 136 #endif 137 138 /* XXX return int so gcc -Werror won't complain */ 139 int main(void *); 140 void check_console(struct proc *); 141 void start_init(void *); 142 void start_cleaner(void *); 143 void start_update(void *); 144 void start_reaper(void *); 145 void crypto_init(void); 146 void init_exec(void); 147 void kqueue_init(void); 148 void workq_init(void); 149 150 extern char sigcode[], esigcode[]; 151 #ifdef SYSCALL_DEBUG 152 extern char *syscallnames[]; 153 #endif 154 155 struct emul emul_native = { 156 "native", 157 NULL, 158 sendsig, 159 SYS_syscall, 160 SYS_MAXSYSCALL, 161 sysent, 162 #ifdef SYSCALL_DEBUG 163 syscallnames, 164 #else 165 NULL, 166 #endif 167 0, 168 copyargs, 169 setregs, 170 NULL, 171 coredump_trad, 172 sigcode, 173 esigcode, 174 EMUL_ENABLED | EMUL_NATIVE, 175 }; 176 177 178 /* 179 * System startup; initialize the world, create process 0, mount root 180 * filesystem, and fork to create init and pagedaemon. Most of the 181 * hard work is done in the lower-level initialization routines including 182 * startup(), which does memory initialization and autoconfiguration. 183 */ 184 /* XXX return int, so gcc -Werror won't complain */ 185 int 186 main(void *framep) 187 { 188 struct proc *p; 189 struct process *pr; 190 struct pdevinit *pdev; 191 struct timeval rtv; 192 quad_t lim; 193 int s, i; 194 extern struct pdevinit pdevinit[]; 195 extern void disk_init(void); 196 197 /* 198 * Initialize the current process pointer (curproc) before 199 * any possible traps/probes to simplify trap processing. 200 */ 201 curproc = p = &proc0; 202 p->p_cpu = curcpu(); 203 204 /* 205 * Initialize timeouts. 206 */ 207 timeout_startup(); 208 209 /* 210 * Attempt to find console and initialize 211 * in case of early panic or other messages. 212 */ 213 config_init(); /* init autoconfiguration data structures */ 214 consinit(); 215 216 printf("%s\n", copyright); 217 218 KERNEL_LOCK_INIT(); 219 SCHED_LOCK_INIT(); 220 221 random_init(); 222 223 uvm_init(); 224 disk_init(); /* must come before autoconfiguration */ 225 tty_init(); /* initialise tty's */ 226 cpu_startup(); 227 228 /* 229 * Initialize mbuf's. Do this now because we might attempt to 230 * allocate mbufs or mbuf clusters during autoconfiguration. 231 */ 232 mbinit(); 233 234 /* Initialize sockets. */ 235 soinit(); 236 237 /* 238 * Initialize process and pgrp structures. 239 */ 240 procinit(); 241 242 /* Initialize file locking. */ 243 lf_init(); 244 245 /* 246 * Initialize filedescriptors. 247 */ 248 filedesc_init(); 249 250 /* 251 * Initialize pipes. 252 */ 253 pipe_init(); 254 255 /* 256 * Initialize kqueues. 257 */ 258 kqueue_init(); 259 260 /* 261 * Create process 0 (the swapper). 262 */ 263 264 process0.ps_mainproc = p; 265 TAILQ_INIT(&process0.ps_threads); 266 TAILQ_INSERT_TAIL(&process0.ps_threads, p, p_thr_link); 267 process0.ps_refcnt = 1; 268 p->p_p = pr = &process0; 269 270 /* Set the default routing table/domain. */ 271 process0.ps_rtableid = 0; 272 273 LIST_INSERT_HEAD(&allproc, p, p_list); 274 pr->ps_pgrp = &pgrp0; 275 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 276 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 277 LIST_INIT(&pgrp0.pg_members); 278 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 279 280 pgrp0.pg_session = &session0; 281 session0.s_count = 1; 282 session0.s_leader = pr; 283 284 atomic_setbits_int(&p->p_flag, P_SYSTEM); 285 p->p_stat = SONPROC; 286 pr->ps_nice = NZERO; 287 p->p_emul = &emul_native; 288 bcopy("swapper", p->p_comm, sizeof ("swapper")); 289 290 /* Init timeouts. */ 291 timeout_set(&p->p_sleep_to, endtsleep, p); 292 timeout_set(&pr->ps_realit_to, realitexpire, pr); 293 294 /* Create credentials. */ 295 p->p_cred = &cred0; 296 p->p_ucred = crget(); 297 p->p_ucred->cr_ngroups = 1; /* group 0 */ 298 299 /* Initialize signal state for process 0. */ 300 signal_init(); 301 p->p_sigacts = &sigacts0; 302 siginit(p); 303 304 /* Create the file descriptor table. */ 305 p->p_fd = fdinit(NULL); 306 307 /* Create the limits structures. */ 308 pr->ps_limit = &limit0; 309 for (i = 0; i < nitems(p->p_rlimit); i++) 310 limit0.pl_rlimit[i].rlim_cur = 311 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 312 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 313 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 314 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 315 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 316 lim = ptoa(uvmexp.free); 317 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 318 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 319 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 320 limit0.p_refcnt = 1; 321 322 /* Allocate a prototype map so we have something to fork. */ 323 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 324 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 325 p->p_vmspace = &vmspace0; 326 327 p->p_addr = proc0paddr; /* XXX */ 328 329 /* 330 * Charge root for one process. 331 */ 332 (void)chgproccnt(0, 1); 333 334 /* Initialize run queues */ 335 sched_init_runqueues(); 336 sleep_queue_init(); 337 sched_init_cpu(curcpu()); 338 339 /* Initialize work queues */ 340 workq_init(); 341 342 random_start(); 343 344 /* Initialize the interface/address trees */ 345 ifinit(); 346 347 /* Configure the devices */ 348 cpu_configure(); 349 350 /* Configure virtual memory system, set vm rlimits. */ 351 uvm_init_limits(p); 352 353 /* Initialize the file systems. */ 354 #if defined(NFSSERVER) || defined(NFSCLIENT) 355 nfs_init(); /* initialize server/shared data */ 356 #endif 357 vfsinit(); 358 359 /* Start real time and statistics clocks. */ 360 initclocks(); 361 362 /* Lock the kernel on behalf of proc0. */ 363 KERNEL_LOCK(); 364 365 #ifdef SYSVSHM 366 /* Initialize System V style shared memory. */ 367 shminit(); 368 #endif 369 370 #ifdef SYSVSEM 371 /* Initialize System V style semaphores. */ 372 seminit(); 373 #endif 374 375 #ifdef SYSVMSG 376 /* Initialize System V style message queues. */ 377 msginit(); 378 #endif 379 380 /* Attach pseudo-devices. */ 381 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 382 if (pdev->pdev_count > 0) 383 (*pdev->pdev_attach)(pdev->pdev_count); 384 385 #ifdef CRYPTO 386 crypto_init(); 387 swcr_init(); 388 #endif /* CRYPTO */ 389 390 /* 391 * Initialize protocols. Block reception of incoming packets 392 * until everything is ready. 393 */ 394 s = splnet(); 395 netisr_init(); 396 domaininit(); 397 if_attachdomain(); 398 splx(s); 399 400 #ifdef GPROF 401 /* Initialize kernel profiling. */ 402 kmstartup(); 403 #endif 404 405 #if !defined(NO_PROPOLICE) 406 { 407 volatile long newguard[8]; 408 409 arc4random_buf((long *)newguard, sizeof(newguard)); 410 411 for (i = nitems(__guard) - 1; i; i--) 412 __guard[i] = newguard[i]; 413 } 414 #endif 415 416 /* init exec and emul */ 417 init_exec(); 418 419 /* Start the scheduler */ 420 scheduler_start(); 421 422 /* 423 * Create process 1 (init(8)). We do this now, as Unix has 424 * historically had init be process 1, and changing this would 425 * probably upset a lot of people. 426 * 427 * Note that process 1 won't immediately exec init(8), but will 428 * wait for us to inform it that the root file system has been 429 * mounted. 430 */ 431 if (fork1(p, SIGCHLD, FORK_FORK, NULL, 0, start_init, NULL, NULL, 432 &initproc)) 433 panic("fork init"); 434 435 /* 436 * Create any kernel threads whose creation was deferred because 437 * initproc had not yet been created. 438 */ 439 kthread_run_deferred_queue(); 440 441 /* 442 * Now that device driver threads have been created, wait for 443 * them to finish any deferred autoconfiguration. Note we don't 444 * need to lock this semaphore, since we haven't booted any 445 * secondary processors, yet. 446 */ 447 while (config_pending) 448 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 449 450 dostartuphooks(); 451 452 #if NMPATH > 0 453 config_rootfound("mpath", NULL); 454 #endif 455 #if NVSCSI > 0 456 config_rootfound("vscsi", NULL); 457 #endif 458 #if NSOFTRAID > 0 459 config_rootfound("softraid", NULL); 460 #endif 461 462 /* Configure root/swap devices */ 463 diskconf(); 464 465 if (mountroot == NULL || ((*mountroot)() != 0)) 466 panic("cannot mount root"); 467 468 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 469 470 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 471 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 472 panic("cannot find root vnode"); 473 p->p_fd->fd_cdir = rootvnode; 474 vref(p->p_fd->fd_cdir); 475 VOP_UNLOCK(rootvnode, 0, p); 476 p->p_fd->fd_rdir = NULL; 477 478 /* 479 * Now that root is mounted, we can fixup initproc's CWD 480 * info. All other processes are kthreads, which merely 481 * share proc0's CWD info. 482 */ 483 initproc->p_fd->fd_cdir = rootvnode; 484 vref(initproc->p_fd->fd_cdir); 485 initproc->p_fd->fd_rdir = NULL; 486 487 /* 488 * Now can look at time, having had a chance to verify the time 489 * from the file system. Reset p->p_rtime as it may have been 490 * munched in mi_switch() after the time got set. 491 */ 492 #ifdef __HAVE_TIMECOUNTER 493 microtime(&boottime); 494 #else 495 boottime = mono_time = time; 496 #endif 497 LIST_FOREACH(p, &allproc, p_list) { 498 p->p_p->ps_start = boottime; 499 microuptime(&p->p_cpu->ci_schedstate.spc_runtime); 500 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 501 } 502 503 uvm_swap_init(); 504 505 /* Create the pageout daemon kernel thread. */ 506 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 507 panic("fork pagedaemon"); 508 509 /* Create the reaper daemon kernel thread. */ 510 if (kthread_create(start_reaper, NULL, &reaperproc, "reaper")) 511 panic("fork reaper"); 512 513 /* Create the cleaner daemon kernel thread. */ 514 if (kthread_create(start_cleaner, NULL, NULL, "cleaner")) 515 panic("fork cleaner"); 516 517 /* Create the update daemon kernel thread. */ 518 if (kthread_create(start_update, NULL, NULL, "update")) 519 panic("fork update"); 520 521 /* Create the aiodone daemon kernel thread. */ 522 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 523 panic("fork aiodoned"); 524 525 microtime(&rtv); 526 srandom((u_int32_t)(rtv.tv_sec ^ rtv.tv_usec) ^ arc4random()); 527 528 randompid = 1; 529 530 #if defined(MULTIPROCESSOR) 531 /* Boot the secondary processors. */ 532 cpu_boot_secondary_processors(); 533 #endif 534 535 domountroothooks(); 536 537 /* 538 * Okay, now we can let init(8) exec! It's off to userland! 539 */ 540 start_init_exec = 1; 541 wakeup((void *)&start_init_exec); 542 543 /* 544 * proc0: nothing to do, back to sleep 545 */ 546 while (1) 547 tsleep(&proc0, PVM, "scheduler", 0); 548 /* NOTREACHED */ 549 } 550 551 /* 552 * List of paths to try when searching for "init". 553 */ 554 static char *initpaths[] = { 555 "/sbin/init", 556 "/sbin/oinit", 557 "/sbin/init.bak", 558 NULL, 559 }; 560 561 void 562 check_console(struct proc *p) 563 { 564 struct nameidata nd; 565 int error; 566 567 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 568 error = namei(&nd); 569 if (error) { 570 if (error == ENOENT) 571 printf("warning: /dev/console does not exist\n"); 572 else 573 printf("warning: /dev/console error %d\n", error); 574 } else 575 vrele(nd.ni_vp); 576 } 577 578 /* 579 * Start the initial user process; try exec'ing each pathname in "initpaths". 580 * The program is invoked with one argument containing the boot flags. 581 */ 582 void 583 start_init(void *arg) 584 { 585 struct proc *p = arg; 586 vaddr_t addr; 587 struct sys_execve_args /* { 588 syscallarg(const char *) path; 589 syscallarg(char *const *) argp; 590 syscallarg(char *const *) envp; 591 } */ args; 592 int options, error; 593 long i; 594 register_t retval[2]; 595 char flags[4], *flagsp; 596 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 597 598 /* 599 * Now in process 1. 600 */ 601 602 /* 603 * Wait for main() to tell us that it's safe to exec. 604 */ 605 while (start_init_exec == 0) 606 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 607 608 check_console(p); 609 610 /* process 0 ignores SIGCHLD, but we can't */ 611 p->p_sigacts->ps_flags = 0; 612 613 /* 614 * Need just enough stack to hold the faked-up "execve()" arguments. 615 */ 616 #ifdef MACHINE_STACK_GROWS_UP 617 addr = USRSTACK; 618 #else 619 addr = USRSTACK - PAGE_SIZE; 620 #endif 621 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 622 NULL, UVM_UNKNOWN_OFFSET, 0, 623 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_ALL, UVM_INH_COPY, 624 UVM_ADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))) 625 panic("init: couldn't allocate argument space"); 626 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 627 628 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 629 #ifdef MACHINE_STACK_GROWS_UP 630 ucp = (char *)addr; 631 #else 632 ucp = (char *)(addr + PAGE_SIZE); 633 #endif 634 /* 635 * Construct the boot flag argument. 636 */ 637 flagsp = flags; 638 *flagsp++ = '-'; 639 options = 0; 640 641 if (boothowto & RB_SINGLE) { 642 *flagsp++ = 's'; 643 options = 1; 644 } 645 #ifdef notyet 646 if (boothowto & RB_FASTBOOT) { 647 *flagsp++ = 'f'; 648 options = 1; 649 } 650 #endif 651 652 /* 653 * Move out the flags (arg 1), if necessary. 654 */ 655 if (options != 0) { 656 *flagsp++ = '\0'; 657 i = flagsp - flags; 658 #ifdef DEBUG 659 printf("init: copying out flags `%s' %d\n", flags, i); 660 #endif 661 #ifdef MACHINE_STACK_GROWS_UP 662 arg1 = ucp; 663 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 664 ucp += i; 665 #else 666 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 667 arg1 = ucp; 668 #endif 669 } 670 671 /* 672 * Move out the file name (also arg 0). 673 */ 674 i = strlen(path) + 1; 675 #ifdef DEBUG 676 printf("init: copying out path `%s' %d\n", path, i); 677 #endif 678 #ifdef MACHINE_STACK_GROWS_UP 679 arg0 = ucp; 680 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 681 ucp += i; 682 ucp = (caddr_t)ALIGN((u_long)ucp); 683 uap = (char **)ucp + 3; 684 #else 685 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 686 arg0 = ucp; 687 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 688 #endif 689 690 /* 691 * Move out the arg pointers. 692 */ 693 i = 0; 694 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 695 if (options != 0) 696 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 697 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 698 699 /* 700 * Point at the arguments. 701 */ 702 SCARG(&args, path) = arg0; 703 SCARG(&args, argp) = uap; 704 SCARG(&args, envp) = NULL; 705 706 /* 707 * Now try to exec the program. If can't for any reason 708 * other than it doesn't exist, complain. 709 */ 710 if ((error = sys_execve(p, &args, retval)) == 0) { 711 KERNEL_UNLOCK(); 712 return; 713 } 714 if (error != ENOENT) 715 printf("exec %s: error %d\n", path, error); 716 } 717 printf("init: not found\n"); 718 panic("no init"); 719 } 720 721 void 722 start_update(void *arg) 723 { 724 sched_sync(curproc); 725 /* NOTREACHED */ 726 } 727 728 void 729 start_cleaner(void *arg) 730 { 731 buf_daemon(curproc); 732 /* NOTREACHED */ 733 } 734 735 void 736 start_reaper(void *arg) 737 { 738 reaper(); 739 /* NOTREACHED */ 740 } 741