1 /* $OpenBSD: init_main.c,v 1.224 2014/11/16 12:31:00 deraadt 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 #include <net/if.h> 88 #include <net/netisr.h> 89 90 #if defined(CRYPTO) 91 #include <crypto/cryptodev.h> 92 #include <crypto/cryptosoft.h> 93 #endif 94 95 #if defined(NFSSERVER) || defined(NFSCLIENT) 96 extern void nfs_init(void); 97 #endif 98 99 #include "mpath.h" 100 #include "vscsi.h" 101 #include "softraid.h" 102 103 const char copyright[] = 104 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 105 "\tThe Regents of the University of California. All rights reserved.\n" 106 "Copyright (c) 1995-2014 OpenBSD. All rights reserved. http://www.OpenBSD.org\n"; 107 108 /* Components of the first process -- never freed. */ 109 struct session session0; 110 struct pgrp pgrp0; 111 struct proc proc0; 112 struct process process0; 113 struct plimit limit0; 114 struct vmspace vmspace0; 115 struct sigacts sigacts0; 116 struct process *initprocess; 117 struct proc *reaperproc; 118 119 #ifndef SMALL_KERNEL 120 extern struct timeout setperf_to; 121 void setperf_auto(void *); 122 #endif 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 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 bcopy("swapper", p->p_comm, sizeof ("swapper")); 291 292 /* Init timeouts. */ 293 timeout_set(&p->p_sleep_to, endtsleep, p); 294 timeout_set(&pr->ps_realit_to, realitexpire, pr); 295 296 /* Create credentials. */ 297 pr->ps_ucred = crget(); 298 pr->ps_ucred->cr_ngroups = 1; /* group 0 */ 299 300 p->p_ucred = pr->ps_ucred; /* prime the thread's cache */ 301 crhold(p->p_ucred); 302 303 /* Initialize signal state for process 0. */ 304 signal_init(); 305 pr->ps_sigacts = &sigacts0; 306 siginit(pr); 307 308 /* Create the file descriptor table. */ 309 p->p_fd = pr->ps_fd = fdinit(); 310 311 /* Create the limits structures. */ 312 pr->ps_limit = &limit0; 313 for (i = 0; i < nitems(p->p_rlimit); i++) 314 limit0.pl_rlimit[i].rlim_cur = 315 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 316 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 317 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 318 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 319 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 320 lim = ptoa(uvmexp.free); 321 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 322 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 323 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 324 limit0.p_refcnt = 1; 325 326 /* Allocate a prototype map so we have something to fork. */ 327 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 328 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 329 p->p_vmspace = pr->ps_vmspace = &vmspace0; 330 331 p->p_addr = proc0paddr; /* XXX */ 332 333 /* 334 * Charge root for one process. 335 */ 336 (void)chgproccnt(0, 1); 337 338 /* Initialize run queues */ 339 sched_init_runqueues(); 340 sleep_queue_init(); 341 sched_init_cpu(curcpu()); 342 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 343 344 /* Initialize work queues */ 345 workq_init(); 346 taskq_init(); 347 348 /* Initialize the interface/address trees */ 349 ifinit(); 350 351 /* Lock the kernel on behalf of proc0. */ 352 KERNEL_LOCK(); 353 354 #if NMPATH > 0 355 /* Attach mpath before hardware */ 356 config_rootfound("mpath", NULL); 357 #endif 358 359 /* Configure the devices */ 360 cpu_configure(); 361 362 /* Configure virtual memory system, set vm rlimits. */ 363 uvm_init_limits(p); 364 365 /* Initialize the file systems. */ 366 #if defined(NFSSERVER) || defined(NFSCLIENT) 367 nfs_init(); /* initialize server/shared data */ 368 #endif 369 vfsinit(); 370 371 /* Start real time and statistics clocks. */ 372 initclocks(); 373 374 #ifdef SYSVSHM 375 /* Initialize System V style shared memory. */ 376 shminit(); 377 #endif 378 379 #ifdef SYSVSEM 380 /* Initialize System V style semaphores. */ 381 seminit(); 382 #endif 383 384 #ifdef SYSVMSG 385 /* Initialize System V style message queues. */ 386 msginit(); 387 #endif 388 389 /* Attach pseudo-devices. */ 390 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 391 if (pdev->pdev_count > 0) 392 (*pdev->pdev_attach)(pdev->pdev_count); 393 394 #ifdef CRYPTO 395 crypto_init(); 396 swcr_init(); 397 #endif /* CRYPTO */ 398 399 /* 400 * Initialize protocols. Block reception of incoming packets 401 * until everything is ready. 402 */ 403 s = splnet(); 404 netisr_init(); 405 domaininit(); 406 if_attachdomain(); 407 splx(s); 408 409 #ifdef GPROF 410 /* Initialize kernel profiling. */ 411 kmstartup(); 412 #endif 413 414 #if !defined(NO_PROPOLICE) 415 if (__guard_local == 0) { 416 volatile long newguard; 417 418 arc4random_buf((void *)&newguard, sizeof newguard); 419 __guard_local = newguard; 420 } 421 #endif 422 423 /* init exec and emul */ 424 init_exec(); 425 426 /* Start the scheduler */ 427 scheduler_start(); 428 429 /* 430 * Create process 1 (init(8)). We do this now, as Unix has 431 * historically had init be process 1, and changing this would 432 * probably upset a lot of people. 433 * 434 * Note that process 1 won't immediately exec init(8), but will 435 * wait for us to inform it that the root file system has been 436 * mounted. 437 */ 438 { 439 struct proc *initproc; 440 441 if (fork1(p, FORK_FORK, NULL, 0, start_init, NULL, NULL, 442 &initproc)) 443 panic("fork init"); 444 initprocess = initproc->p_p; 445 } 446 447 randompid = 1; 448 449 /* 450 * Create any kernel threads whose creation was deferred because 451 * initprocess had not yet been created. 452 */ 453 kthread_run_deferred_queue(); 454 455 /* 456 * Now that device driver threads have been created, wait for 457 * them to finish any deferred autoconfiguration. Note we don't 458 * need to lock this semaphore, since we haven't booted any 459 * secondary processors, yet. 460 */ 461 while (config_pending) 462 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 463 464 dostartuphooks(); 465 466 #if NVSCSI > 0 467 config_rootfound("vscsi", NULL); 468 #endif 469 #if NSOFTRAID > 0 470 config_rootfound("softraid", NULL); 471 #endif 472 473 /* Configure root/swap devices */ 474 diskconf(); 475 476 if (mountroot == NULL || ((*mountroot)() != 0)) 477 panic("cannot mount root"); 478 479 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 480 481 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 482 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 483 panic("cannot find root vnode"); 484 p->p_fd->fd_cdir = rootvnode; 485 vref(p->p_fd->fd_cdir); 486 VOP_UNLOCK(rootvnode, 0, p); 487 p->p_fd->fd_rdir = NULL; 488 489 /* 490 * Now that root is mounted, we can fixup initprocess's CWD 491 * info. All other processes are kthreads, which merely 492 * share proc0's CWD info. 493 */ 494 initprocess->ps_fd->fd_cdir = rootvnode; 495 vref(initprocess->ps_fd->fd_cdir); 496 initprocess->ps_fd->fd_rdir = NULL; 497 498 /* 499 * Now can look at time, having had a chance to verify the time 500 * from the file system. Reset p->p_rtime as it may have been 501 * munched in mi_switch() after the time got set. 502 */ 503 nanotime(&boottime); 504 LIST_FOREACH(pr, &allprocess, ps_list) { 505 pr->ps_start = boottime; 506 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 507 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 508 timespecclear(&p->p_rtime); 509 } 510 } 511 512 uvm_swap_init(); 513 514 /* Create the pageout daemon kernel thread. */ 515 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 516 panic("fork pagedaemon"); 517 518 /* Create the reaper daemon kernel thread. */ 519 if (kthread_create(start_reaper, NULL, &reaperproc, "reaper")) 520 panic("fork reaper"); 521 522 /* Create the cleaner daemon kernel thread. */ 523 if (kthread_create(start_cleaner, NULL, NULL, "cleaner")) 524 panic("fork cleaner"); 525 526 /* Create the update daemon kernel thread. */ 527 if (kthread_create(start_update, NULL, NULL, "update")) 528 panic("fork update"); 529 530 /* Create the aiodone daemon kernel thread. */ 531 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 532 panic("fork aiodoned"); 533 534 #if !defined(__hppa__) && !(defined(__m88k__) && defined(MULTIPROCESSOR)) 535 /* Create the page zeroing kernel thread. */ 536 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 537 panic("fork zerothread"); 538 #endif 539 540 #if defined(MULTIPROCESSOR) 541 /* Boot the secondary processors. */ 542 cpu_boot_secondary_processors(); 543 #endif 544 545 domountroothooks(); 546 547 /* 548 * Okay, now we can let init(8) exec! It's off to userland! 549 */ 550 start_init_exec = 1; 551 wakeup((void *)&start_init_exec); 552 553 #ifndef SMALL_KERNEL 554 timeout_set(&setperf_to, setperf_auto, NULL); 555 #endif 556 557 /* 558 * proc0: nothing to do, back to sleep 559 */ 560 while (1) 561 tsleep(&proc0, PVM, "scheduler", 0); 562 /* NOTREACHED */ 563 } 564 565 /* 566 * List of paths to try when searching for "init". 567 */ 568 static char *initpaths[] = { 569 "/sbin/init", 570 "/sbin/oinit", 571 "/sbin/init.bak", 572 NULL, 573 }; 574 575 void 576 check_console(struct proc *p) 577 { 578 struct nameidata nd; 579 int error; 580 581 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 582 error = namei(&nd); 583 if (error) { 584 if (error == ENOENT) 585 printf("warning: /dev/console does not exist\n"); 586 else 587 printf("warning: /dev/console error %d\n", error); 588 } else 589 vrele(nd.ni_vp); 590 } 591 592 /* 593 * Start the initial user process; try exec'ing each pathname in "initpaths". 594 * The program is invoked with one argument containing the boot flags. 595 */ 596 void 597 start_init(void *arg) 598 { 599 struct proc *p = arg; 600 vaddr_t addr; 601 struct sys_execve_args /* { 602 syscallarg(const char *) path; 603 syscallarg(char *const *) argp; 604 syscallarg(char *const *) envp; 605 } */ args; 606 int options, error; 607 long i; 608 register_t retval[2]; 609 char flags[4], *flagsp; 610 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 611 612 /* 613 * Now in process 1. 614 */ 615 616 /* 617 * Wait for main() to tell us that it's safe to exec. 618 */ 619 while (start_init_exec == 0) 620 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 621 622 check_console(p); 623 624 /* process 0 ignores SIGCHLD, but we can't */ 625 p->p_p->ps_sigacts->ps_flags = 0; 626 627 /* 628 * Need just enough stack to hold the faked-up "execve()" arguments. 629 */ 630 #ifdef MACHINE_STACK_GROWS_UP 631 addr = USRSTACK; 632 #else 633 addr = USRSTACK - PAGE_SIZE; 634 #endif 635 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 636 NULL, UVM_UNKNOWN_OFFSET, 0, 637 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, UVM_INH_COPY, 638 POSIX_MADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))) 639 panic("init: couldn't allocate argument space"); 640 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 641 642 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 643 #ifdef MACHINE_STACK_GROWS_UP 644 ucp = (char *)addr; 645 #else 646 ucp = (char *)(addr + PAGE_SIZE); 647 #endif 648 /* 649 * Construct the boot flag argument. 650 */ 651 flagsp = flags; 652 *flagsp++ = '-'; 653 options = 0; 654 655 if (boothowto & RB_SINGLE) { 656 *flagsp++ = 's'; 657 options = 1; 658 } 659 #ifdef notyet 660 if (boothowto & RB_FASTBOOT) { 661 *flagsp++ = 'f'; 662 options = 1; 663 } 664 #endif 665 666 /* 667 * Move out the flags (arg 1), if necessary. 668 */ 669 if (options != 0) { 670 *flagsp++ = '\0'; 671 i = flagsp - flags; 672 #ifdef DEBUG 673 printf("init: copying out flags `%s' %ld\n", flags, i); 674 #endif 675 #ifdef MACHINE_STACK_GROWS_UP 676 arg1 = ucp; 677 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 678 ucp += i; 679 #else 680 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 681 arg1 = ucp; 682 #endif 683 } 684 685 /* 686 * Move out the file name (also arg 0). 687 */ 688 i = strlen(path) + 1; 689 #ifdef DEBUG 690 printf("init: copying out path `%s' %ld\n", path, i); 691 #endif 692 #ifdef MACHINE_STACK_GROWS_UP 693 arg0 = ucp; 694 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 695 ucp += i; 696 ucp = (caddr_t)ALIGN((u_long)ucp); 697 uap = (char **)ucp + 3; 698 #else 699 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 700 arg0 = ucp; 701 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 702 #endif 703 704 /* 705 * Move out the arg pointers. 706 */ 707 i = 0; 708 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 709 if (options != 0) 710 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 711 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 712 713 /* 714 * Point at the arguments. 715 */ 716 SCARG(&args, path) = arg0; 717 SCARG(&args, argp) = uap; 718 SCARG(&args, envp) = NULL; 719 720 /* 721 * Now try to exec the program. If can't for any reason 722 * other than it doesn't exist, complain. 723 */ 724 if ((error = sys_execve(p, &args, retval)) == 0) { 725 KERNEL_UNLOCK(); 726 return; 727 } 728 if (error != ENOENT) 729 printf("exec %s: error %d\n", path, error); 730 } 731 printf("init: not found\n"); 732 panic("no init"); 733 } 734 735 void 736 start_update(void *arg) 737 { 738 sched_sync(curproc); 739 /* NOTREACHED */ 740 } 741 742 void 743 start_cleaner(void *arg) 744 { 745 buf_daemon(curproc); 746 /* NOTREACHED */ 747 } 748 749 void 750 start_reaper(void *arg) 751 { 752 reaper(); 753 /* NOTREACHED */ 754 } 755