1 /* $OpenBSD: init_main.c,v 1.250 2016/05/03 14:52:39 mpi 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/filedesc.h> 43 #include <sys/file.h> 44 #include <sys/errno.h> 45 #include <sys/exec.h> 46 #include <sys/kernel.h> 47 #include <sys/kthread.h> 48 #include <sys/mount.h> 49 #include <sys/proc.h> 50 #include <sys/resourcevar.h> 51 #include <sys/signalvar.h> 52 #include <sys/systm.h> 53 #include <sys/namei.h> 54 #include <sys/vnode.h> 55 #include <sys/tty.h> 56 #include <sys/conf.h> 57 #include <sys/buf.h> 58 #include <sys/device.h> 59 #include <sys/socketvar.h> 60 #include <sys/lockf.h> 61 #include <sys/protosw.h> 62 #include <sys/reboot.h> 63 #include <sys/user.h> 64 #ifdef SYSVSHM 65 #include <sys/shm.h> 66 #endif 67 #ifdef SYSVSEM 68 #include <sys/sem.h> 69 #endif 70 #ifdef SYSVMSG 71 #include <sys/msg.h> 72 #endif 73 #include <sys/domain.h> 74 #include <sys/msgbuf.h> 75 #include <sys/mbuf.h> 76 #include <sys/pipe.h> 77 #include <sys/task.h> 78 79 #include <sys/syscall.h> 80 #include <sys/syscallargs.h> 81 82 #include <uvm/uvm_extern.h> 83 84 #include <dev/rndvar.h> 85 86 #include <ufs/ufs/quota.h> 87 88 #include <net/if.h> 89 #include <net/rtable.h> 90 #include <net/netisr.h> 91 92 #if defined(CRYPTO) 93 #include <crypto/cryptodev.h> 94 #include <crypto/cryptosoft.h> 95 #endif 96 97 #if defined(NFSSERVER) || defined(NFSCLIENT) 98 extern void nfs_init(void); 99 #endif 100 101 #include "mpath.h" 102 #include "vscsi.h" 103 #include "softraid.h" 104 105 const char copyright[] = 106 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 107 "\tThe Regents of the University of California. All rights reserved.\n" 108 "Copyright (c) 1995-2016 OpenBSD. All rights reserved. http://www.OpenBSD.org\n"; 109 110 /* Components of the first process -- never freed. */ 111 struct session session0; 112 struct pgrp pgrp0; 113 struct proc proc0; 114 struct process process0; 115 struct plimit limit0; 116 struct vmspace vmspace0; 117 struct sigacts sigacts0; 118 struct process *initprocess; 119 struct proc *reaperproc; 120 121 extern struct user *proc0paddr; 122 123 struct vnode *rootvp, *swapdev_vp; 124 int boothowto; 125 struct timespec boottime; 126 int ncpus = 1; 127 int ncpusfound = 1; /* number of cpus we find */ 128 volatile int start_init_exec; /* semaphore for start_init() */ 129 130 #if !defined(NO_PROPOLICE) 131 long __guard_local __attribute__((section(".openbsd.randomdata"))); 132 #endif 133 134 /* XXX return int so gcc -Werror won't complain */ 135 int main(void *); 136 void check_console(struct proc *); 137 void start_init(void *); 138 void start_cleaner(void *); 139 void start_update(void *); 140 void start_reaper(void *); 141 void crypto_init(void); 142 void init_exec(void); 143 void kqueue_init(void); 144 void taskq_init(void); 145 void pool_gc_pages(void *); 146 147 extern char sigcode[], esigcode[]; 148 #ifdef SYSCALL_DEBUG 149 extern char *syscallnames[]; 150 #endif 151 152 struct emul emul_native = { 153 "native", 154 NULL, 155 sendsig, 156 SYS_syscall, 157 SYS_MAXSYSCALL, 158 sysent, 159 #ifdef SYSCALL_DEBUG 160 syscallnames, 161 #else 162 NULL, 163 #endif 164 0, 165 copyargs, 166 setregs, 167 NULL, /* fixup */ 168 NULL, /* coredump */ 169 sigcode, 170 esigcode, 171 EMUL_ENABLED | EMUL_NATIVE, 172 }; 173 174 175 /* 176 * System startup; initialize the world, create process 0, mount root 177 * filesystem, and fork to create init and pagedaemon. Most of the 178 * hard work is done in the lower-level initialization routines including 179 * startup(), which does memory initialization and autoconfiguration. 180 */ 181 /* XXX return int, so gcc -Werror won't complain */ 182 int 183 main(void *framep) 184 { 185 struct proc *p; 186 struct process *pr; 187 struct pdevinit *pdev; 188 quad_t lim; 189 int s, i; 190 extern struct pdevinit pdevinit[]; 191 extern void disk_init(void); 192 193 /* 194 * Initialize the current process pointer (curproc) before 195 * any possible traps/probes to simplify trap processing. 196 */ 197 curproc = p = &proc0; 198 p->p_cpu = curcpu(); 199 200 /* 201 * Initialize timeouts. 202 */ 203 timeout_startup(); 204 205 /* 206 * Attempt to find console and initialize 207 * in case of early panic or other messages. 208 */ 209 config_init(); /* init autoconfiguration data structures */ 210 consinit(); 211 212 printf("%s\n", copyright); 213 214 KERNEL_LOCK_INIT(); 215 SCHED_LOCK_INIT(); 216 217 uvm_init(); 218 disk_init(); /* must come before autoconfiguration */ 219 tty_init(); /* initialise tty's */ 220 cpu_startup(); 221 222 random_start(); /* Start the flow */ 223 224 /* 225 * Initialize mbuf's. Do this now because we might attempt to 226 * allocate mbufs or mbuf clusters during autoconfiguration. 227 */ 228 mbinit(); 229 230 /* Initialize sockets. */ 231 soinit(); 232 233 /* Initialize SRP subsystem. */ 234 srp_startup(); 235 236 /* 237 * Initialize process and pgrp structures. 238 */ 239 procinit(); 240 241 /* Initialize file locking. */ 242 lf_init(); 243 244 /* 245 * Initialize filedescriptors. 246 */ 247 filedesc_init(); 248 249 /* 250 * Initialize pipes. 251 */ 252 pipe_init(); 253 254 /* 255 * Initialize kqueues. 256 */ 257 kqueue_init(); 258 259 /* Create credentials. */ 260 p->p_ucred = crget(); 261 p->p_ucred->cr_ngroups = 1; /* group 0 */ 262 263 /* 264 * Create process 0 (the swapper). 265 */ 266 pr = &process0; 267 process_initialize(pr, p); 268 269 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 270 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 271 272 /* Set the default routing table/domain. */ 273 process0.ps_rtableid = 0; 274 275 LIST_INSERT_HEAD(&allproc, p, p_list); 276 pr->ps_pgrp = &pgrp0; 277 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 278 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 279 LIST_INIT(&pgrp0.pg_members); 280 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 281 282 pgrp0.pg_session = &session0; 283 session0.s_count = 1; 284 session0.s_leader = pr; 285 286 atomic_setbits_int(&p->p_flag, P_SYSTEM); 287 p->p_stat = SONPROC; 288 pr->ps_nice = NZERO; 289 pr->ps_emul = &emul_native; 290 strlcpy(p->p_comm, "swapper", sizeof(p->p_comm)); 291 292 /* Init timeouts. */ 293 timeout_set(&p->p_sleep_to, endtsleep, p); 294 295 /* Initialize signal state for process 0. */ 296 signal_init(); 297 pr->ps_sigacts = &sigacts0; 298 siginit(pr); 299 300 /* Create the file descriptor table. */ 301 p->p_fd = pr->ps_fd = fdinit(); 302 303 /* Create the limits structures. */ 304 pr->ps_limit = &limit0; 305 for (i = 0; i < nitems(p->p_rlimit); i++) 306 limit0.pl_rlimit[i].rlim_cur = 307 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 308 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 309 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 310 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 311 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 312 lim = ptoa(uvmexp.free); 313 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 314 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 315 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 316 limit0.p_refcnt = 1; 317 318 /* Allocate a prototype map so we have something to fork. */ 319 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 320 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 321 p->p_vmspace = pr->ps_vmspace = &vmspace0; 322 323 p->p_addr = proc0paddr; /* XXX */ 324 325 /* 326 * Charge root for one process. 327 */ 328 (void)chgproccnt(0, 1); 329 330 /* Initialize run queues */ 331 sched_init_runqueues(); 332 sleep_queue_init(); 333 sched_init_cpu(curcpu()); 334 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 335 336 /* Initialize task queues */ 337 taskq_init(); 338 339 /* Initialize the interface/address trees */ 340 ifinit(); 341 342 /* Lock the kernel on behalf of proc0. */ 343 KERNEL_LOCK(); 344 345 #if NMPATH > 0 346 /* Attach mpath before hardware */ 347 config_rootfound("mpath", NULL); 348 #endif 349 350 /* Configure the devices */ 351 cpu_configure(); 352 353 /* Configure virtual memory system, set vm rlimits. */ 354 uvm_init_limits(p); 355 356 /* Initialize the file systems. */ 357 #if defined(NFSSERVER) || defined(NFSCLIENT) 358 nfs_init(); /* initialize server/shared data */ 359 #endif 360 vfsinit(); 361 362 /* Start real time and statistics clocks. */ 363 initclocks(); 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 rtable_init(); 391 392 /* 393 * Initialize protocols. Block reception of incoming packets 394 * until everything is ready. 395 */ 396 s = splnet(); 397 domaininit(); 398 splx(s); 399 400 initconsbuf(); 401 402 #ifdef GPROF 403 /* Initialize kernel profiling. */ 404 kmstartup(); 405 #endif 406 407 #if !defined(NO_PROPOLICE) 408 if (__guard_local == 0) { 409 volatile long newguard; 410 411 arc4random_buf((void *)&newguard, sizeof newguard); 412 __guard_local = newguard; 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 { 432 struct proc *initproc; 433 434 if (fork1(p, FORK_FORK, NULL, 0, start_init, NULL, NULL, 435 &initproc)) 436 panic("fork init"); 437 initprocess = initproc->p_p; 438 } 439 440 randompid = 1; 441 442 /* 443 * Create any kernel threads whose creation was deferred because 444 * initprocess had not yet been created. 445 */ 446 kthread_run_deferred_queue(); 447 448 /* 449 * Now that device driver threads have been created, wait for 450 * them to finish any deferred autoconfiguration. Note we don't 451 * need to lock this semaphore, since we haven't booted any 452 * secondary processors, yet. 453 */ 454 while (config_pending) 455 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 456 457 dostartuphooks(); 458 459 #if NVSCSI > 0 460 config_rootfound("vscsi", NULL); 461 #endif 462 #if NSOFTRAID > 0 463 config_rootfound("softraid", NULL); 464 #endif 465 466 /* Configure root/swap devices */ 467 diskconf(); 468 469 if (mountroot == NULL || ((*mountroot)() != 0)) 470 panic("cannot mount root"); 471 472 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 473 474 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 475 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 476 panic("cannot find root vnode"); 477 p->p_fd->fd_cdir = rootvnode; 478 vref(p->p_fd->fd_cdir); 479 VOP_UNLOCK(rootvnode, p); 480 p->p_fd->fd_rdir = NULL; 481 482 /* 483 * Now that root is mounted, we can fixup initprocess's CWD 484 * info. All other processes are kthreads, which merely 485 * share proc0's CWD info. 486 */ 487 initprocess->ps_fd->fd_cdir = rootvnode; 488 vref(initprocess->ps_fd->fd_cdir); 489 initprocess->ps_fd->fd_rdir = NULL; 490 491 /* 492 * Now can look at time, having had a chance to verify the time 493 * from the file system. Reset p->p_rtime as it may have been 494 * munched in mi_switch() after the time got set. 495 */ 496 nanotime(&boottime); 497 LIST_FOREACH(pr, &allprocess, ps_list) { 498 pr->ps_start = boottime; 499 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 500 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 501 timespecclear(&p->p_rtime); 502 } 503 } 504 505 uvm_swap_init(); 506 507 /* Create the pageout daemon kernel thread. */ 508 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 509 panic("fork pagedaemon"); 510 511 /* Create the reaper daemon kernel thread. */ 512 if (kthread_create(start_reaper, NULL, &reaperproc, "reaper")) 513 panic("fork reaper"); 514 515 /* Create the cleaner daemon kernel thread. */ 516 if (kthread_create(start_cleaner, NULL, NULL, "cleaner")) 517 panic("fork cleaner"); 518 519 /* Create the update daemon kernel thread. */ 520 if (kthread_create(start_update, NULL, NULL, "update")) 521 panic("fork update"); 522 523 /* Create the aiodone daemon kernel thread. */ 524 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 525 panic("fork aiodoned"); 526 527 #if !defined(__hppa__) 528 /* Create the page zeroing kernel thread. */ 529 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 530 panic("fork zerothread"); 531 #endif 532 533 #if defined(MULTIPROCESSOR) 534 /* Boot the secondary processors. */ 535 cpu_boot_secondary_processors(); 536 #endif 537 538 config_process_deferred_mountroot(); 539 540 /* 541 * Okay, now we can let init(8) exec! It's off to userland! 542 */ 543 start_init_exec = 1; 544 wakeup((void *)&start_init_exec); 545 546 /* 547 * Start the idle pool page garbage collector 548 */ 549 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 550 pool_gc_pages(NULL); 551 #endif 552 553 /* 554 * proc0: nothing to do, back to sleep 555 */ 556 while (1) 557 tsleep(&proc0, PVM, "scheduler", 0); 558 /* NOTREACHED */ 559 } 560 561 /* 562 * List of paths to try when searching for "init". 563 */ 564 static char *initpaths[] = { 565 "/sbin/init", 566 "/sbin/oinit", 567 "/sbin/init.bak", 568 NULL, 569 }; 570 571 void 572 check_console(struct proc *p) 573 { 574 struct nameidata nd; 575 int error; 576 577 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 578 error = namei(&nd); 579 if (error) { 580 if (error == ENOENT) 581 printf("warning: /dev/console does not exist\n"); 582 else 583 printf("warning: /dev/console error %d\n", error); 584 } else 585 vrele(nd.ni_vp); 586 } 587 588 /* 589 * Start the initial user process; try exec'ing each pathname in "initpaths". 590 * The program is invoked with one argument containing the boot flags. 591 */ 592 void 593 start_init(void *arg) 594 { 595 struct proc *p = arg; 596 vaddr_t addr; 597 struct sys_execve_args /* { 598 syscallarg(const char *) path; 599 syscallarg(char *const *) argp; 600 syscallarg(char *const *) envp; 601 } */ args; 602 int options, error; 603 long i; 604 register_t retval[2]; 605 char flags[4], *flagsp; 606 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 607 608 /* 609 * Now in process 1. 610 */ 611 612 /* 613 * Wait for main() to tell us that it's safe to exec. 614 */ 615 while (start_init_exec == 0) 616 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 617 618 check_console(p); 619 620 /* process 0 ignores SIGCHLD, but we can't */ 621 p->p_p->ps_sigacts->ps_flags = 0; 622 623 /* 624 * Need just enough stack to hold the faked-up "execve()" arguments. 625 */ 626 #ifdef MACHINE_STACK_GROWS_UP 627 addr = USRSTACK; 628 #else 629 addr = USRSTACK - PAGE_SIZE; 630 #endif 631 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 632 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 633 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 634 NULL, UVM_UNKNOWN_OFFSET, 0, 635 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 636 MADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))) 637 panic("init: couldn't allocate argument space"); 638 639 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 640 #ifdef MACHINE_STACK_GROWS_UP 641 ucp = (char *)addr; 642 #else 643 ucp = (char *)(addr + PAGE_SIZE); 644 #endif 645 /* 646 * Construct the boot flag argument. 647 */ 648 flagsp = flags; 649 *flagsp++ = '-'; 650 options = 0; 651 652 if (boothowto & RB_SINGLE) { 653 *flagsp++ = 's'; 654 options = 1; 655 } 656 #ifdef notyet 657 if (boothowto & RB_FASTBOOT) { 658 *flagsp++ = 'f'; 659 options = 1; 660 } 661 #endif 662 663 /* 664 * Move out the flags (arg 1), if necessary. 665 */ 666 if (options != 0) { 667 *flagsp++ = '\0'; 668 i = flagsp - flags; 669 #ifdef DEBUG 670 printf("init: copying out flags `%s' %ld\n", flags, i); 671 #endif 672 #ifdef MACHINE_STACK_GROWS_UP 673 arg1 = ucp; 674 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 675 ucp += i; 676 #else 677 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 678 arg1 = ucp; 679 #endif 680 } 681 682 /* 683 * Move out the file name (also arg 0). 684 */ 685 i = strlen(path) + 1; 686 #ifdef DEBUG 687 printf("init: copying out path `%s' %ld\n", path, i); 688 #endif 689 #ifdef MACHINE_STACK_GROWS_UP 690 arg0 = ucp; 691 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 692 ucp += i; 693 ucp = (caddr_t)ALIGN((u_long)ucp); 694 uap = (char **)ucp + 3; 695 #else 696 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 697 arg0 = ucp; 698 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 699 #endif 700 701 /* 702 * Move out the arg pointers. 703 */ 704 i = 0; 705 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 706 if (options != 0) 707 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 708 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 709 710 /* 711 * Point at the arguments. 712 */ 713 SCARG(&args, path) = arg0; 714 SCARG(&args, argp) = uap; 715 SCARG(&args, envp) = NULL; 716 717 /* 718 * Now try to exec the program. If can't for any reason 719 * other than it doesn't exist, complain. 720 */ 721 if ((error = sys_execve(p, &args, retval)) == 0) { 722 KERNEL_UNLOCK(); 723 return; 724 } 725 if (error != ENOENT) 726 printf("exec %s: error %d\n", path, error); 727 } 728 printf("init: not found\n"); 729 panic("no init"); 730 } 731 732 void 733 start_update(void *arg) 734 { 735 sched_sync(curproc); 736 /* NOTREACHED */ 737 } 738 739 void 740 start_cleaner(void *arg) 741 { 742 buf_daemon(curproc); 743 /* NOTREACHED */ 744 } 745 746 void 747 start_reaper(void *arg) 748 { 749 reaper(); 750 /* NOTREACHED */ 751 } 752