1 /* $OpenBSD: init_main.c,v 1.253 2016/05/17 23:28:03 bluhm 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[], sigcoderet[]; 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 sigcoderet, 172 EMUL_ENABLED | EMUL_NATIVE, 173 }; 174 175 176 /* 177 * System startup; initialize the world, create process 0, mount root 178 * filesystem, and fork to create init and pagedaemon. Most of the 179 * hard work is done in the lower-level initialization routines including 180 * startup(), which does memory initialization and autoconfiguration. 181 */ 182 /* XXX return int, so gcc -Werror won't complain */ 183 int 184 main(void *framep) 185 { 186 struct proc *p; 187 struct process *pr; 188 struct pdevinit *pdev; 189 quad_t lim; 190 int s, i; 191 extern struct pdevinit pdevinit[]; 192 extern void disk_init(void); 193 194 /* 195 * Initialize the current process pointer (curproc) before 196 * any possible traps/probes to simplify trap processing. 197 */ 198 curproc = p = &proc0; 199 p->p_cpu = curcpu(); 200 201 /* 202 * Initialize timeouts. 203 */ 204 timeout_startup(); 205 206 /* 207 * Attempt to find console and initialize 208 * in case of early panic or other messages. 209 */ 210 config_init(); /* init autoconfiguration data structures */ 211 consinit(); 212 213 printf("%s\n", copyright); 214 215 KERNEL_LOCK_INIT(); 216 SCHED_LOCK_INIT(); 217 218 uvm_init(); 219 disk_init(); /* must come before autoconfiguration */ 220 tty_init(); /* initialise tty's */ 221 cpu_startup(); 222 223 random_start(); /* Start the flow */ 224 225 /* 226 * Initialize mbuf's. Do this now because we might attempt to 227 * allocate mbufs or mbuf clusters during autoconfiguration. 228 */ 229 mbinit(); 230 231 /* Initialize sockets. */ 232 soinit(); 233 234 /* Initialize SRP subsystem. */ 235 srp_startup(); 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 /* Create credentials. */ 261 p->p_ucred = crget(); 262 p->p_ucred->cr_ngroups = 1; /* group 0 */ 263 264 /* 265 * Create process 0 (the swapper). 266 */ 267 pr = &process0; 268 process_initialize(pr, p); 269 270 LIST_INSERT_HEAD(&allprocess, pr, ps_list); 271 atomic_setbits_int(&pr->ps_flags, PS_SYSTEM); 272 273 /* Set the default routing table/domain. */ 274 process0.ps_rtableid = 0; 275 276 LIST_INSERT_HEAD(&allproc, p, p_list); 277 pr->ps_pgrp = &pgrp0; 278 LIST_INSERT_HEAD(PIDHASH(0), p, p_hash); 279 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 280 LIST_INIT(&pgrp0.pg_members); 281 LIST_INSERT_HEAD(&pgrp0.pg_members, pr, ps_pglist); 282 283 pgrp0.pg_session = &session0; 284 session0.s_count = 1; 285 session0.s_leader = pr; 286 287 atomic_setbits_int(&p->p_flag, P_SYSTEM); 288 p->p_stat = SONPROC; 289 pr->ps_nice = NZERO; 290 pr->ps_emul = &emul_native; 291 strlcpy(p->p_comm, "swapper", sizeof(p->p_comm)); 292 293 /* Init timeouts. */ 294 timeout_set(&p->p_sleep_to, endtsleep, p); 295 296 /* Initialize signal state for process 0. */ 297 signal_init(); 298 pr->ps_sigacts = &sigacts0; 299 siginit(pr); 300 301 /* Create the file descriptor table. */ 302 p->p_fd = pr->ps_fd = fdinit(); 303 304 /* Create the limits structures. */ 305 pr->ps_limit = &limit0; 306 for (i = 0; i < nitems(p->p_rlimit); i++) 307 limit0.pl_rlimit[i].rlim_cur = 308 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 309 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = NOFILE; 310 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = MIN(NOFILE_MAX, 311 (maxfiles - NOFILE > NOFILE) ? maxfiles - NOFILE : NOFILE); 312 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = MAXUPRC; 313 lim = ptoa(uvmexp.free); 314 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 315 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 316 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 317 limit0.p_refcnt = 1; 318 319 /* Allocate a prototype map so we have something to fork. */ 320 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 321 trunc_page(VM_MAX_ADDRESS), TRUE, TRUE); 322 p->p_vmspace = pr->ps_vmspace = &vmspace0; 323 324 p->p_addr = proc0paddr; /* XXX */ 325 326 /* 327 * Charge root for one process. 328 */ 329 (void)chgproccnt(0, 1); 330 331 /* Initialize run queues */ 332 sched_init_runqueues(); 333 sleep_queue_init(); 334 sched_init_cpu(curcpu()); 335 p->p_cpu->ci_randseed = (arc4random() & 0x7fffffff) + 1; 336 337 /* Initialize task queues */ 338 taskq_init(); 339 340 /* Initialize the interface/address trees */ 341 ifinit(); 342 343 /* Lock the kernel on behalf of proc0. */ 344 KERNEL_LOCK(); 345 346 #if NMPATH > 0 347 /* Attach mpath before hardware */ 348 config_rootfound("mpath", NULL); 349 #endif 350 351 /* Configure the devices */ 352 cpu_configure(); 353 354 /* Configure virtual memory system, set vm rlimits. */ 355 uvm_init_limits(p); 356 357 /* Initialize the file systems. */ 358 #if defined(NFSSERVER) || defined(NFSCLIENT) 359 nfs_init(); /* initialize server/shared data */ 360 #endif 361 vfsinit(); 362 363 /* Start real time and statistics clocks. */ 364 initclocks(); 365 366 #ifdef SYSVSHM 367 /* Initialize System V style shared memory. */ 368 shminit(); 369 #endif 370 371 #ifdef SYSVSEM 372 /* Initialize System V style semaphores. */ 373 seminit(); 374 #endif 375 376 #ifdef SYSVMSG 377 /* Initialize System V style message queues. */ 378 msginit(); 379 #endif 380 381 /* Attach pseudo-devices. */ 382 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 383 if (pdev->pdev_count > 0) 384 (*pdev->pdev_attach)(pdev->pdev_count); 385 386 #ifdef CRYPTO 387 crypto_init(); 388 swcr_init(); 389 #endif /* CRYPTO */ 390 391 rtable_init(); 392 393 /* 394 * Initialize protocols. Block reception of incoming packets 395 * until everything is ready. 396 */ 397 s = splnet(); 398 domaininit(); 399 splx(s); 400 401 initconsbuf(); 402 403 #ifdef GPROF 404 /* Initialize kernel profiling. */ 405 kmstartup(); 406 #endif 407 408 #if !defined(NO_PROPOLICE) 409 if (__guard_local == 0) { 410 volatile long newguard; 411 412 arc4random_buf((void *)&newguard, sizeof newguard); 413 __guard_local = newguard; 414 } 415 #endif 416 417 /* init exec and emul */ 418 init_exec(); 419 420 /* Start the scheduler */ 421 scheduler_start(); 422 423 /* 424 * Create process 1 (init(8)). We do this now, as Unix has 425 * historically had init be process 1, and changing this would 426 * probably upset a lot of people. 427 * 428 * Note that process 1 won't immediately exec init(8), but will 429 * wait for us to inform it that the root file system has been 430 * mounted. 431 */ 432 { 433 struct proc *initproc; 434 435 if (fork1(p, FORK_FORK, NULL, 0, start_init, NULL, NULL, 436 &initproc)) 437 panic("fork init"); 438 initprocess = initproc->p_p; 439 } 440 441 randompid = 1; 442 443 /* 444 * Create any kernel threads whose creation was deferred because 445 * initprocess had not yet been created. 446 */ 447 kthread_run_deferred_queue(); 448 449 /* 450 * Now that device driver threads have been created, wait for 451 * them to finish any deferred autoconfiguration. Note we don't 452 * need to lock this semaphore, since we haven't booted any 453 * secondary processors, yet. 454 */ 455 while (config_pending) 456 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 457 458 dostartuphooks(); 459 460 #if NVSCSI > 0 461 config_rootfound("vscsi", NULL); 462 #endif 463 #if NSOFTRAID > 0 464 config_rootfound("softraid", NULL); 465 #endif 466 467 /* Configure root/swap devices */ 468 diskconf(); 469 470 if (mountroot == NULL || ((*mountroot)() != 0)) 471 panic("cannot mount root"); 472 473 TAILQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 474 475 /* Get the vnode for '/'. Set p->p_fd->fd_cdir to reference it. */ 476 if (VFS_ROOT(TAILQ_FIRST(&mountlist), &rootvnode)) 477 panic("cannot find root vnode"); 478 p->p_fd->fd_cdir = rootvnode; 479 vref(p->p_fd->fd_cdir); 480 VOP_UNLOCK(rootvnode, p); 481 p->p_fd->fd_rdir = NULL; 482 483 /* 484 * Now that root is mounted, we can fixup initprocess's CWD 485 * info. All other processes are kthreads, which merely 486 * share proc0's CWD info. 487 */ 488 initprocess->ps_fd->fd_cdir = rootvnode; 489 vref(initprocess->ps_fd->fd_cdir); 490 initprocess->ps_fd->fd_rdir = NULL; 491 492 /* 493 * Now can look at time, having had a chance to verify the time 494 * from the file system. Reset p->p_rtime as it may have been 495 * munched in mi_switch() after the time got set. 496 */ 497 nanotime(&boottime); 498 LIST_FOREACH(pr, &allprocess, ps_list) { 499 pr->ps_start = boottime; 500 TAILQ_FOREACH(p, &pr->ps_threads, p_thr_link) { 501 nanouptime(&p->p_cpu->ci_schedstate.spc_runtime); 502 timespecclear(&p->p_rtime); 503 } 504 } 505 506 uvm_swap_init(); 507 508 /* Create the pageout daemon kernel thread. */ 509 if (kthread_create(uvm_pageout, NULL, NULL, "pagedaemon")) 510 panic("fork pagedaemon"); 511 512 /* Create the reaper daemon kernel thread. */ 513 if (kthread_create(start_reaper, NULL, &reaperproc, "reaper")) 514 panic("fork reaper"); 515 516 /* Create the cleaner daemon kernel thread. */ 517 if (kthread_create(start_cleaner, NULL, NULL, "cleaner")) 518 panic("fork cleaner"); 519 520 /* Create the update daemon kernel thread. */ 521 if (kthread_create(start_update, NULL, NULL, "update")) 522 panic("fork update"); 523 524 /* Create the aiodone daemon kernel thread. */ 525 if (kthread_create(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 526 panic("fork aiodoned"); 527 528 #if !defined(__hppa__) 529 /* Create the page zeroing kernel thread. */ 530 if (kthread_create(uvm_pagezero_thread, NULL, NULL, "zerothread")) 531 panic("fork zerothread"); 532 #endif 533 534 #if defined(MULTIPROCESSOR) 535 /* Boot the secondary processors. */ 536 cpu_boot_secondary_processors(); 537 #endif 538 539 config_process_deferred_mountroot(); 540 541 /* 542 * Okay, now we can let init(8) exec! It's off to userland! 543 */ 544 start_init_exec = 1; 545 wakeup((void *)&start_init_exec); 546 547 /* 548 * Start the idle pool page garbage collector 549 */ 550 #if !(defined(__m88k__) && defined(MULTIPROCESSOR)) /* XXX */ 551 pool_gc_pages(NULL); 552 #endif 553 554 /* 555 * proc0: nothing to do, back to sleep 556 */ 557 while (1) 558 tsleep(&proc0, PVM, "scheduler", 0); 559 /* NOTREACHED */ 560 } 561 562 /* 563 * List of paths to try when searching for "init". 564 */ 565 static char *initpaths[] = { 566 "/sbin/init", 567 "/sbin/oinit", 568 "/sbin/init.bak", 569 NULL, 570 }; 571 572 void 573 check_console(struct proc *p) 574 { 575 struct nameidata nd; 576 int error; 577 578 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 579 error = namei(&nd); 580 if (error) { 581 if (error == ENOENT) 582 printf("warning: /dev/console does not exist\n"); 583 else 584 printf("warning: /dev/console error %d\n", error); 585 } else 586 vrele(nd.ni_vp); 587 } 588 589 /* 590 * Start the initial user process; try exec'ing each pathname in "initpaths". 591 * The program is invoked with one argument containing the boot flags. 592 */ 593 void 594 start_init(void *arg) 595 { 596 struct proc *p = arg; 597 vaddr_t addr; 598 struct sys_execve_args /* { 599 syscallarg(const char *) path; 600 syscallarg(char *const *) argp; 601 syscallarg(char *const *) envp; 602 } */ args; 603 int options, error; 604 long i; 605 register_t retval[2]; 606 char flags[4], *flagsp; 607 char **pathp, *path, *ucp, **uap, *arg0, *arg1 = NULL; 608 609 /* 610 * Now in process 1. 611 */ 612 613 /* 614 * Wait for main() to tell us that it's safe to exec. 615 */ 616 while (start_init_exec == 0) 617 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 618 619 check_console(p); 620 621 /* process 0 ignores SIGCHLD, but we can't */ 622 p->p_p->ps_sigacts->ps_flags = 0; 623 624 /* 625 * Need just enough stack to hold the faked-up "execve()" arguments. 626 */ 627 #ifdef MACHINE_STACK_GROWS_UP 628 addr = USRSTACK; 629 #else 630 addr = USRSTACK - PAGE_SIZE; 631 #endif 632 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 633 p->p_vmspace->vm_minsaddr = (caddr_t)(addr + PAGE_SIZE); 634 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 635 NULL, UVM_UNKNOWN_OFFSET, 0, 636 UVM_MAPFLAG(PROT_READ | PROT_WRITE, PROT_MASK, MAP_INHERIT_COPY, 637 MADV_NORMAL, UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW))) 638 panic("init: couldn't allocate argument space"); 639 640 for (pathp = &initpaths[0]; (path = *pathp) != NULL; pathp++) { 641 #ifdef MACHINE_STACK_GROWS_UP 642 ucp = (char *)addr; 643 #else 644 ucp = (char *)(addr + PAGE_SIZE); 645 #endif 646 /* 647 * Construct the boot flag argument. 648 */ 649 flagsp = flags; 650 *flagsp++ = '-'; 651 options = 0; 652 653 if (boothowto & RB_SINGLE) { 654 *flagsp++ = 's'; 655 options = 1; 656 } 657 #ifdef notyet 658 if (boothowto & RB_FASTBOOT) { 659 *flagsp++ = 'f'; 660 options = 1; 661 } 662 #endif 663 664 /* 665 * Move out the flags (arg 1), if necessary. 666 */ 667 if (options != 0) { 668 *flagsp++ = '\0'; 669 i = flagsp - flags; 670 #ifdef DEBUG 671 printf("init: copying out flags `%s' %ld\n", flags, i); 672 #endif 673 #ifdef MACHINE_STACK_GROWS_UP 674 arg1 = ucp; 675 (void)copyout((caddr_t)flags, (caddr_t)ucp, i); 676 ucp += i; 677 #else 678 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 679 arg1 = ucp; 680 #endif 681 } 682 683 /* 684 * Move out the file name (also arg 0). 685 */ 686 i = strlen(path) + 1; 687 #ifdef DEBUG 688 printf("init: copying out path `%s' %ld\n", path, i); 689 #endif 690 #ifdef MACHINE_STACK_GROWS_UP 691 arg0 = ucp; 692 (void)copyout((caddr_t)path, (caddr_t)ucp, i); 693 ucp += i; 694 ucp = (caddr_t)ALIGN((u_long)ucp); 695 uap = (char **)ucp + 3; 696 #else 697 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 698 arg0 = ucp; 699 uap = (char **)((u_long)ucp & ~ALIGNBYTES); 700 #endif 701 702 /* 703 * Move out the arg pointers. 704 */ 705 i = 0; 706 copyout(&i, (caddr_t)--uap, sizeof(register_t)); /* terminator */ 707 if (options != 0) 708 copyout(&arg1, (caddr_t)--uap, sizeof(register_t)); 709 copyout(&arg0, (caddr_t)--uap, sizeof(register_t)); 710 711 /* 712 * Point at the arguments. 713 */ 714 SCARG(&args, path) = arg0; 715 SCARG(&args, argp) = uap; 716 SCARG(&args, envp) = NULL; 717 718 /* 719 * Now try to exec the program. If can't for any reason 720 * other than it doesn't exist, complain. 721 */ 722 if ((error = sys_execve(p, &args, retval)) == 0) { 723 KERNEL_UNLOCK(); 724 return; 725 } 726 if (error != ENOENT) 727 printf("exec %s: error %d\n", path, error); 728 } 729 printf("init: not found\n"); 730 panic("no init"); 731 } 732 733 void 734 start_update(void *arg) 735 { 736 sched_sync(curproc); 737 /* NOTREACHED */ 738 } 739 740 void 741 start_cleaner(void *arg) 742 { 743 buf_daemon(curproc); 744 /* NOTREACHED */ 745 } 746 747 void 748 start_reaper(void *arg) 749 { 750 reaper(); 751 /* NOTREACHED */ 752 } 753