1 /* $OpenBSD: init_main.c,v 1.205 2014/03/22 06:05:45 guenther 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 #include <sys/task.h> 79 80 #include <sys/syscall.h> 81 #include <sys/syscallargs.h> 82 83 #include <dev/rndvar.h> 84 85 #include <ufs/ufs/quota.h> 86 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) 1995-2014 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 timespec 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_local __attribute__((section(".openbsd.randomdata"))); 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 void taskq_init(void); 150 151 extern char sigcode[], esigcode[]; 152 #ifdef SYSCALL_DEBUG 153 extern char *syscallnames[]; 154 #endif 155 156 struct emul emul_native = { 157 "native", 158 NULL, 159 sendsig, 160 SYS_syscall, 161 SYS_MAXSYSCALL, 162 sysent, 163 #ifdef SYSCALL_DEBUG 164 syscallnames, 165 #else 166 NULL, 167 #endif 168 0, 169 copyargs, 170 setregs, 171 NULL, 172 coredump_trad, 173 sigcode, 174 esigcode, 175 EMUL_ENABLED | EMUL_NATIVE, 176 }; 177 178 179 /* 180 * System startup; initialize the world, create process 0, mount root 181 * filesystem, and fork to create init and pagedaemon. Most of the 182 * hard work is done in the lower-level initialization routines including 183 * startup(), which does memory initialization and autoconfiguration. 184 */ 185 /* XXX return int, so gcc -Werror won't complain */ 186 int 187 main(void *framep) 188 { 189 struct proc *p; 190 struct process *pr; 191 struct pdevinit *pdev; 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 uvm_init(); 222 disk_init(); /* must come before autoconfiguration */ 223 tty_init(); /* initialise tty's */ 224 cpu_startup(); 225 226 random_start(); /* Start the flow */ 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 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 270 271 /* Set the default routing table/domain. */ 272 process0.ps_rtableid = 0; 273 274 LIST_INSERT_HEAD(&allproc, p, p_list); 275 pr->ps_pgrp = &pgrp0; 276 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 277 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 278 LIST_INIT(&pgrp0.pg_members); 279 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 280 281 pgrp0.pg_session = &session0; 282 session0.s_count = 1; 283 session0.s_leader = pr; 284 285 atomic_setbits_int(&p->p_flag, P_SYSTEM); 286 p->p_stat = SONPROC; 287 pr->ps_nice = NZERO; 288 p->p_emul = &emul_native; 289 bcopy("swapper", p->p_comm, sizeof ("swapper")); 290 291 /* Init timeouts. */ 292 timeout_set(&p->p_sleep_to, endtsleep, p); 293 timeout_set(&pr->ps_realit_to, realitexpire, pr); 294 295 /* Create credentials. */ 296 p->p_cred = &cred0; 297 p->p_ucred = crget(); 298 p->p_ucred->cr_ngroups = 1; /* group 0 */ 299 300 /* Initialize signal state for process 0. */ 301 signal_init(); 302 pr->ps_sigacts = &sigacts0; 303 siginit(pr); 304 305 /* Create the file descriptor table. */ 306 p->p_fd = fdinit(NULL); 307 308 /* Create the limits structures. */ 309 pr->ps_limit = &limit0; 310 for (i = 0; i < nitems(p->p_rlimit); i++) 311 limit0.pl_rlimit[i].rlim_cur = 312 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 313 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 314 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 315 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 316 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 317 lim = ptoa(uvmexp.free); 318 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 319 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 320 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 321 limit0.p_refcnt = 1; 322 323 /* Allocate a prototype map so we have something to fork. */ 324 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 325 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 326 p->p_vmspace = &vmspace0; 327 328 p->p_addr = proc0paddr; /* XXX */ 329 330 /* 331 * Charge root for one process. 332 */ 333 (void)chgproccnt(0, 1); 334 335 /* Initialize run queues */ 336 sched_init_runqueues(); 337 sleep_queue_init(); 338 sched_init_cpu(curcpu()); 339 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 340 341 /* Initialize work queues */ 342 workq_init(); 343 taskq_init(); 344 345 /* Initialize the interface/address trees */ 346 ifinit(); 347 348 #if NMPATH > 0 349 /* Attach mpath before hardware */ 350 config_rootfound("mpath", NULL); 351 #endif 352 353 /* Configure the devices */ 354 cpu_configure(); 355 356 /* Configure virtual memory system, set vm rlimits. */ 357 uvm_init_limits(p); 358 359 /* Initialize the file systems. */ 360 #if defined(NFSSERVER) || defined(NFSCLIENT) 361 nfs_init(); /* initialize server/shared data */ 362 #endif 363 vfsinit(); 364 365 /* Start real time and statistics clocks. */ 366 initclocks(); 367 368 /* Lock the kernel on behalf of proc0. */ 369 KERNEL_LOCK(); 370 371 #ifdef SYSVSHM 372 /* Initialize System V style shared memory. */ 373 shminit(); 374 #endif 375 376 #ifdef SYSVSEM 377 /* Initialize System V style semaphores. */ 378 seminit(); 379 #endif 380 381 #ifdef SYSVMSG 382 /* Initialize System V style message queues. */ 383 msginit(); 384 #endif 385 386 /* Attach pseudo-devices. */ 387 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 388 if (pdev->pdev_count > 0) 389 (*pdev->pdev_attach)(pdev->pdev_count); 390 391 #ifdef CRYPTO 392 crypto_init(); 393 swcr_init(); 394 #endif /* CRYPTO */ 395 396 /* 397 * Initialize protocols. Block reception of incoming packets 398 * until everything is ready. 399 */ 400 s = splnet(); 401 netisr_init(); 402 domaininit(); 403 if_attachdomain(); 404 splx(s); 405 406 #ifdef GPROF 407 /* Initialize kernel profiling. */ 408 kmstartup(); 409 #endif 410 411 #if !defined(NO_PROPOLICE) 412 if (__guard_local == 0) { 413 volatile long newguard; 414 415 arc4random_buf((void *)&newguard, sizeof newguard); 416 __guard_local = newguard; 417 } 418 #endif 419 420 /* init exec and emul */ 421 init_exec(); 422 423 /* Start the scheduler */ 424 scheduler_start(); 425 426 /* 427 * Create process 1 (init(8)). We do this now, as Unix has 428 * historically had init be process 1, and changing this would 429 * probably upset a lot of people. 430 * 431 * Note that process 1 won't immediately exec init(8), but will 432 * wait for us to inform it that the root file system has been 433 * mounted. 434 */ 435 if (fork1(p, FORK_FORK, NULL, 0, start_init, NULL, NULL, 436 &initproc)) 437 panic("fork init"); 438 439 randompid = 1; 440 441 /* 442 * Create any kernel threads whose creation was deferred because 443 * initproc had not yet been created. 444 */ 445 kthread_run_deferred_queue(); 446 447 /* 448 * Now that device driver threads have been created, wait for 449 * them to finish any deferred autoconfiguration. Note we don't 450 * need to lock this semaphore, since we haven't booted any 451 * secondary processors, yet. 452 */ 453 while (config_pending) 454 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 455 456 dostartuphooks(); 457 458 #if NVSCSI > 0 459 config_rootfound("vscsi", NULL); 460 #endif 461 #if NSOFTRAID > 0 462 config_rootfound("softraid", NULL); 463 #endif 464 465 /* Configure root/swap devices */ 466 diskconf(); 467 468 if (mountroot == NULL || ((*mountroot)() != 0)) 469 panic("cannot mount root"); 470 471 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 472 473 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 474 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 475 panic("cannot find root vnode"); 476 p->p_fd->fd_cdir = rootvnode; 477 vref(p->p_fd->fd_cdir); 478 VOP_UNLOCK(rootvnode, 0, p); 479 p->p_fd->fd_rdir = NULL; 480 481 /* 482 * Now that root is mounted, we can fixup initproc's CWD 483 * info. All other processes are kthreads, which merely 484 * share proc0's CWD info. 485 */ 486 initproc->p_fd->fd_cdir = rootvnode; 487 vref(initproc->p_fd->fd_cdir); 488 initproc->p_fd->fd_rdir = NULL; 489 490 /* 491 * Now can look at time, having had a chance to verify the time 492 * from the file system. Reset p->p_rtime as it may have been 493 * munched in mi_switch() after the time got set. 494 */ 495 nanotime(&boottime); 496 LIST_FOREACH(pr, &allprocess, ps_list) { 497 pr->ps_start = boottime; 498 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 499 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 500 timespecclear(&p->p_rtime); 501 } 502 } 503 504 uvm_swap_init(); 505 506 /* Create the pageout daemon kernel thread. */ 507 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 508 panic("fork pagedaemon"); 509 510 /* Create the reaper daemon kernel thread. */ 511 if (kthread_create(start_reaper, NULL, &reaperproc, "reaper")) 512 panic("fork reaper"); 513 514 /* Create the cleaner daemon kernel thread. */ 515 if (kthread_create(start_cleaner, NULL, NULL, "cleaner")) 516 panic("fork cleaner"); 517 518 /* Create the update daemon kernel thread. */ 519 if (kthread_create(start_update, NULL, NULL, "update")) 520 panic("fork update"); 521 522 /* Create the aiodone daemon kernel thread. */ 523 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 524 panic("fork aiodoned"); 525 526 #if defined(MULTIPROCESSOR) 527 /* Boot the secondary processors. */ 528 cpu_boot_secondary_processors(); 529 #endif 530 531 domountroothooks(); 532 533 /* 534 * Okay, now we can let init(8) exec! It's off to userland! 535 */ 536 start_init_exec = 1; 537 wakeup((void *)&start_init_exec); 538 539 /* 540 * proc0: nothing to do, back to sleep 541 */ 542 while (1) 543 tsleep(&proc0, PVM, "scheduler", 0); 544 /* NOTREACHED */ 545 } 546 547 /* 548 * List of paths to try when searching for "init". 549 */ 550 static char *initpaths[] = { 551 "/sbin/init", 552 "/sbin/oinit", 553 "/sbin/init.bak", 554 NULL, 555 }; 556 557 void 558 check_console(struct proc *p) 559 { 560 struct nameidata nd; 561 int error; 562 563 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 564 error = namei(&nd); 565 if (error) { 566 if (error == ENOENT) 567 printf("warning: /dev/console does not exist\n"); 568 else 569 printf("warning: /dev/console error %d\n", error); 570 } else 571 vrele(nd.ni_vp); 572 } 573 574 /* 575 * Start the initial user process; try exec'ing each pathname in "initpaths". 576 * The program is invoked with one argument containing the boot flags. 577 */ 578 void 579 start_init(void *arg) 580 { 581 struct proc *p = arg; 582 vaddr_t addr; 583 struct sys_execve_args /* { 584 syscallarg(const char *) path; 585 syscallarg(char *const *) argp; 586 syscallarg(char *const *) envp; 587 } */ args; 588 int options, error; 589 long i; 590 register_t retval[2]; 591 char flags[4], *flagsp; 592 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 593 594 /* 595 * Now in process 1. 596 */ 597 598 /* 599 * Wait for main() to tell us that it's safe to exec. 600 */ 601 while (start_init_exec == 0) 602 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 603 604 check_console(p); 605 606 /* process 0 ignores SIGCHLD, but we can't */ 607 p->p_p->ps_sigacts->ps_flags = 0; 608 609 /* 610 * Need just enough stack to hold the faked-up "execve()" arguments. 611 */ 612 #ifdef MACHINE_STACK_GROWS_UP 613 addr = USRSTACK; 614 #else 615 addr = USRSTACK - PAGE_SIZE; 616 #endif 617 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 618 NULL, UVM_UNKNOWN_OFFSET, 0, 619 UVM_MAPFLAG(UVM_PROT_RW, UVM_PROT_ALL, UVM_INH_COPY, 620 UVM_ADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))) 621 panic("init: couldn't allocate argument space"); 622 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 623 624 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 625 #ifdef MACHINE_STACK_GROWS_UP 626 ucp = (char *)addr; 627 #else 628 ucp = (char *)(addr + PAGE_SIZE); 629 #endif 630 /* 631 * Construct the boot flag argument. 632 */ 633 flagsp = flags; 634 *flagsp++ = '-'; 635 options = 0; 636 637 if (boothowto & RB_SINGLE) { 638 *flagsp++ = 's'; 639 options = 1; 640 } 641 #ifdef notyet 642 if (boothowto & RB_FASTBOOT) { 643 *flagsp++ = 'f'; 644 options = 1; 645 } 646 #endif 647 648 /* 649 * Move out the flags (arg 1), if necessary. 650 */ 651 if (options != 0) { 652 *flagsp++ = '\0'; 653 i = flagsp - flags; 654 #ifdef DEBUG 655 printf("init: copying out flags `%s' %d\n", flags, i); 656 #endif 657 #ifdef MACHINE_STACK_GROWS_UP 658 arg1 = ucp; 659 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 660 ucp += i; 661 #else 662 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 663 arg1 = ucp; 664 #endif 665 } 666 667 /* 668 * Move out the file name (also arg 0). 669 */ 670 i = strlen(path) + 1; 671 #ifdef DEBUG 672 printf("init: copying out path `%s' %d\n", path, i); 673 #endif 674 #ifdef MACHINE_STACK_GROWS_UP 675 arg0 = ucp; 676 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 677 ucp += i; 678 ucp = (caddr_t)ALIGN((u_long)ucp); 679 uap = (char **)ucp + 3; 680 #else 681 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 682 arg0 = ucp; 683 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 684 #endif 685 686 /* 687 * Move out the arg pointers. 688 */ 689 i = 0; 690 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 691 if (options != 0) 692 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 693 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 694 695 /* 696 * Point at the arguments. 697 */ 698 SCARG(&args, path) = arg0; 699 SCARG(&args, argp) = uap; 700 SCARG(&args, envp) = NULL; 701 702 /* 703 * Now try to exec the program. If can't for any reason 704 * other than it doesn't exist, complain. 705 */ 706 if ((error = sys_execve(p, &args, retval)) == 0) { 707 KERNEL_UNLOCK(); 708 return; 709 } 710 if (error != ENOENT) 711 printf("exec %s: error %d\n", path, error); 712 } 713 printf("init: not found\n"); 714 panic("no init"); 715 } 716 717 void 718 start_update(void *arg) 719 { 720 sched_sync(curproc); 721 /* NOTREACHED */ 722 } 723 724 void 725 start_cleaner(void *arg) 726 { 727 buf_daemon(curproc); 728 /* NOTREACHED */ 729 } 730 731 void 732 start_reaper(void *arg) 733 { 734 reaper(); 735 /* NOTREACHED */ 736 } 737