init_main.c revision 1.272
1 /* $NetBSD: init_main.c,v 1.272 2006/07/14 22:44:28 kardel Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 37 */ 38 39 /* 40 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 41 * 42 * Redistribution and use in source and binary forms, with or without 43 * modification, are permitted provided that the following conditions 44 * are met: 45 * 1. Redistributions of source code must retain the above copyright 46 * notice, this list of conditions and the following disclaimer. 47 * 2. Redistributions in binary form must reproduce the above copyright 48 * notice, this list of conditions and the following disclaimer in the 49 * documentation and/or other materials provided with the distribution. 50 * 3. All advertising materials mentioning features or use of this software 51 * must display the following acknowledgement: 52 * This product includes software developed by the University of 53 * California, Berkeley and its contributors. 54 * 4. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 71 */ 72 73 #include <sys/cdefs.h> 74 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.272 2006/07/14 22:44:28 kardel Exp $"); 75 76 #include "opt_ipsec.h" 77 #include "opt_kcont.h" 78 #include "opt_multiprocessor.h" 79 #include "opt_ntp.h" 80 #include "opt_pipe.h" 81 #include "opt_posix.h" 82 #include "opt_syscall_debug.h" 83 #include "opt_sysv.h" 84 #include "opt_verified_exec.h" 85 #include "opt_fileassoc.h" 86 87 #include "rnd.h" 88 89 #include <sys/param.h> 90 #include <sys/acct.h> 91 #include <sys/filedesc.h> 92 #include <sys/file.h> 93 #include <sys/errno.h> 94 #include <sys/callout.h> 95 #include <sys/kernel.h> 96 #include <sys/kcont.h> 97 #include <sys/kmem.h> 98 #include <sys/mount.h> 99 #include <sys/proc.h> 100 #include <sys/kthread.h> 101 #include <sys/resourcevar.h> 102 #include <sys/signalvar.h> 103 #include <sys/systm.h> 104 #include <sys/vnode.h> 105 #include <sys/tty.h> 106 #include <sys/conf.h> 107 #include <sys/disklabel.h> 108 #include <sys/buf.h> 109 #include <sys/device.h> 110 #include <sys/exec.h> 111 #include <sys/socketvar.h> 112 #include <sys/protosw.h> 113 #include <sys/reboot.h> 114 #include <sys/user.h> 115 #include <sys/sysctl.h> 116 #include <sys/event.h> 117 #include <sys/mbuf.h> 118 #ifdef FAST_IPSEC 119 #include <netipsec/ipsec.h> 120 #endif 121 #ifdef SYSVSHM 122 #include <sys/shm.h> 123 #endif 124 #ifdef SYSVSEM 125 #include <sys/sem.h> 126 #endif 127 #ifdef SYSVMSG 128 #include <sys/msg.h> 129 #endif 130 #ifdef P1003_1B_SEMAPHORE 131 #include <sys/ksem.h> 132 #endif 133 #include <sys/domain.h> 134 #include <sys/namei.h> 135 #if NRND > 0 136 #include <sys/rnd.h> 137 #endif 138 #ifndef PIPE_SOCKETPAIR 139 #include <sys/pipe.h> 140 #endif 141 #ifdef LKM 142 #include <sys/lkm.h> 143 #endif 144 #ifdef VERIFIED_EXEC 145 #include <sys/verified_exec.h> 146 #endif 147 #include <sys/kauth.h> 148 #include <net80211/ieee80211_netbsd.h> 149 150 #include <sys/syscall.h> 151 #include <sys/sa.h> 152 #include <sys/syscallargs.h> 153 154 #ifdef FILEASSOC 155 #include <sys/fileassoc.h> 156 #endif /* FILEASSOC */ 157 158 #include <ufs/ufs/quota.h> 159 160 #include <miscfs/genfs/genfs.h> 161 #include <miscfs/syncfs/syncfs.h> 162 163 #include <machine/cpu.h> 164 165 #include <uvm/uvm.h> 166 167 #include <dev/cons.h> 168 169 #include <net/if.h> 170 #include <net/raw_cb.h> 171 172 extern struct proc proc0; 173 extern struct lwp lwp0; 174 extern struct cwdinfo cwdi0; 175 176 #ifndef curlwp 177 struct lwp *curlwp = &lwp0; 178 #endif 179 struct proc *initproc; 180 181 struct vnode *rootvp, *swapdev_vp; 182 int boothowto; 183 int cold = 1; /* still working on startup */ 184 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 185 time_t rootfstime; /* recorded root fs time, if known */ 186 187 volatile int start_init_exec; /* semaphore for start_init() */ 188 189 static void check_console(struct lwp *l); 190 static void start_init(void *); 191 void main(void); 192 193 /* 194 * System startup; initialize the world, create process 0, mount root 195 * filesystem, and fork to create init and pagedaemon. Most of the 196 * hard work is done in the lower-level initialization routines including 197 * startup(), which does memory initialization and autoconfiguration. 198 */ 199 void 200 main(void) 201 { 202 #ifdef __HAVE_TIMECOUNTER 203 struct timeval time; 204 #endif 205 struct lwp *l; 206 struct proc *p; 207 struct pdevinit *pdev; 208 int s, error; 209 extern struct pdevinit pdevinit[]; 210 extern void schedcpu(void *); 211 #ifdef NVNODE_IMPLICIT 212 int usevnodes; 213 #endif 214 215 /* 216 * Initialize the current LWP pointer (curlwp) before 217 * any possible traps/probes to simplify trap processing. 218 */ 219 l = &lwp0; 220 curlwp = l; 221 l->l_cpu = curcpu(); 222 l->l_proc = &proc0; 223 l->l_lid = 1; 224 225 /* 226 * Attempt to find console and initialize 227 * in case of early panic or other messages. 228 */ 229 consinit(); 230 231 KERNEL_LOCK_INIT(); 232 233 uvm_init(); 234 235 kmem_init(); 236 237 /* Do machine-dependent initialization. */ 238 cpu_startup(); 239 240 /* Initialize callouts. */ 241 callout_startup(); 242 243 /* Initialize the buffer cache */ 244 bufinit(); 245 246 /* 247 * Initialize mbuf's. Do this now because we might attempt to 248 * allocate mbufs or mbuf clusters during autoconfiguration. 249 */ 250 mbinit(); 251 252 /* Initialize sockets. */ 253 soinit(); 254 255 #ifdef KCONT 256 /* Initialize kcont. */ 257 kcont_init(); 258 #endif 259 260 /* 261 * The following things must be done before autoconfiguration. 262 */ 263 evcnt_init(); /* initialize event counters */ 264 #if NRND > 0 265 rnd_init(); /* initialize RNG */ 266 #endif 267 /* Initialize the sysctl subsystem. */ 268 sysctl_init(); 269 270 /* Initialize process and pgrp structures. */ 271 procinit(); 272 273 /* Initialize signal-related data structures. */ 274 signal_init(); 275 276 /* Create process 0 (the swapper). */ 277 proc0_init(); 278 279 /* 280 * Charge root for one process. 281 */ 282 (void)chgproccnt(0, 1); 283 284 rqinit(); 285 286 /* Initialize the file systems. */ 287 #ifdef NVNODE_IMPLICIT 288 /* 289 * If maximum number of vnodes in namei vnode cache is not explicitly 290 * defined in kernel config, adjust the number such as we use roughly 291 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 292 */ 293 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 294 if (usevnodes > desiredvnodes) 295 desiredvnodes = usevnodes; 296 #endif 297 vfsinit(); 298 299 300 #ifdef __HAVE_TIMECOUNTER 301 inittimecounter(); 302 ntp_init(); 303 #endif /* __HAVE_TIMECOUNTER */ 304 305 /* Configure the system hardware. This will enable interrupts. */ 306 configure(); 307 308 ubc_init(); /* must be after autoconfig */ 309 310 /* Lock the kernel on behalf of proc0. */ 311 KERNEL_PROC_LOCK(l); 312 313 #ifdef SYSVSHM 314 /* Initialize System V style shared memory. */ 315 shminit(); 316 #endif 317 318 #ifdef SYSVSEM 319 /* Initialize System V style semaphores. */ 320 seminit(); 321 #endif 322 323 #ifdef SYSVMSG 324 /* Initialize System V style message queues. */ 325 msginit(); 326 #endif 327 328 #ifdef P1003_1B_SEMAPHORE 329 /* Initialize posix semaphores */ 330 ksem_init(); 331 #endif 332 333 /* Initialize kauth. */ 334 kauth_init(); 335 336 #ifdef FILEASSOC 337 fileassoc_init(); 338 #endif /* FILEASSOC */ 339 340 #ifdef VERIFIED_EXEC 341 /* 342 * Initialise the fingerprint operations vectors before 343 * fingerprints can be loaded. 344 */ 345 veriexec_init_fp_ops(); 346 #endif 347 348 /* Attach pseudo-devices. */ 349 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 350 (*pdev->pdev_attach)(pdev->pdev_count); 351 352 #ifdef FAST_IPSEC 353 /* Attach network crypto subsystem */ 354 ipsec_attach(); 355 #endif 356 357 /* 358 * Initialize protocols. Block reception of incoming packets 359 * until everything is ready. 360 */ 361 s = splnet(); 362 ifinit(); 363 domaininit(); 364 if_attachdomain(); 365 splx(s); 366 367 #ifdef GPROF 368 /* Initialize kernel profiling. */ 369 kmstartup(); 370 #endif 371 372 /* Initialize system accouting. */ 373 acct_init(); 374 375 /* Kick off timeout driven events by calling first time. */ 376 schedcpu(NULL); 377 378 /* 379 * Create process 1 (init(8)). We do this now, as Unix has 380 * historically had init be process 1, and changing this would 381 * probably upset a lot of people. 382 * 383 * Note that process 1 won't immediately exec init(8), but will 384 * wait for us to inform it that the root file system has been 385 * mounted. 386 */ 387 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 388 panic("fork init"); 389 390 /* 391 * Create any kernel threads who's creation was deferred because 392 * initproc had not yet been created. 393 */ 394 kthread_run_deferred_queue(); 395 396 /* 397 * Now that device driver threads have been created, wait for 398 * them to finish any deferred autoconfiguration. Note we don't 399 * need to lock this semaphore, since we haven't booted any 400 * secondary processors, yet. 401 */ 402 while (config_pending) 403 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 404 405 /* 406 * Finalize configuration now that all real devices have been 407 * found. This needs to be done before the root device is 408 * selected, since finalization may create the root device. 409 */ 410 config_finalize(); 411 412 /* 413 * Now that autoconfiguration has completed, we can determine 414 * the root and dump devices. 415 */ 416 cpu_rootconf(); 417 cpu_dumpconf(); 418 419 /* Mount the root file system. */ 420 do { 421 domountroothook(); 422 if ((error = vfs_mountroot())) { 423 printf("cannot mount root, error = %d\n", error); 424 boothowto |= RB_ASKNAME; 425 setroot(root_device, 426 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 427 } 428 } while (error != 0); 429 mountroothook_destroy(); 430 431 /* 432 * Initialise the time-of-day clock, passing the time recorded 433 * in the root filesystem (if any) for use by systems that 434 * don't have a non-volatile time-of-day device. 435 */ 436 inittodr(rootfstime); 437 438 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 439 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 440 441 /* 442 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 443 * reference it. 444 */ 445 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 446 if (error) 447 panic("cannot find root vnode, error=%d", error); 448 cwdi0.cwdi_cdir = rootvnode; 449 VREF(cwdi0.cwdi_cdir); 450 VOP_UNLOCK(rootvnode, 0); 451 cwdi0.cwdi_rdir = NULL; 452 453 /* 454 * Now that root is mounted, we can fixup initproc's CWD 455 * info. All other processes are kthreads, which merely 456 * share proc0's CWD info. 457 */ 458 initproc->p_cwdi->cwdi_cdir = rootvnode; 459 VREF(initproc->p_cwdi->cwdi_cdir); 460 initproc->p_cwdi->cwdi_rdir = NULL; 461 462 /* 463 * Now can look at time, having had a chance to verify the time 464 * from the file system. Reset p->p_rtime as it may have been 465 * munched in mi_switch() after the time got set. 466 */ 467 proclist_lock_read(); 468 s = splsched(); 469 #ifdef __HAVE_TIMECOUNTER 470 getmicrotime(&time); 471 #else 472 mono_time = time; 473 #endif 474 boottime = time; 475 LIST_FOREACH(p, &allproc, p_list) { 476 KASSERT((p->p_flag & P_MARKER) == 0); 477 p->p_stats->p_start = time; 478 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 479 if (l->l_cpu != NULL) 480 l->l_cpu->ci_schedstate.spc_runtime = time; 481 } 482 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 483 } 484 splx(s); 485 proclist_unlock_read(); 486 487 /* Create the pageout daemon kernel thread. */ 488 uvm_swap_init(); 489 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 490 panic("fork pagedaemon"); 491 492 /* Create the filesystem syncer kernel thread. */ 493 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 494 panic("fork syncer"); 495 496 /* Create the aiodone daemon kernel thread. */ 497 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 498 "aiodoned")) 499 panic("fork aiodoned"); 500 501 #if defined(MULTIPROCESSOR) 502 /* Boot the secondary processors. */ 503 cpu_boot_secondary_processors(); 504 #endif 505 506 /* Initialize exec structures */ 507 exec_init(1); 508 509 /* 510 * Okay, now we can let init(8) exec! It's off to userland! 511 */ 512 start_init_exec = 1; 513 wakeup(&start_init_exec); 514 515 /* The scheduler is an infinite loop. */ 516 uvm_scheduler(); 517 /* NOTREACHED */ 518 } 519 520 void 521 setrootfstime(time_t t) 522 { 523 rootfstime = t; 524 } 525 526 static void 527 check_console(struct lwp *l) 528 { 529 struct nameidata nd; 530 int error; 531 532 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 533 error = namei(&nd); 534 if (error == 0) 535 vrele(nd.ni_vp); 536 else if (error == ENOENT) 537 printf("warning: no /dev/console\n"); 538 else 539 printf("warning: lookup /dev/console: error %d\n", error); 540 } 541 542 /* 543 * List of paths to try when searching for "init". 544 */ 545 static const char *initpaths[] = { 546 "/sbin/init", 547 "/sbin/oinit", 548 "/sbin/init.bak", 549 NULL, 550 }; 551 552 /* 553 * Start the initial user process; try exec'ing each pathname in "initpaths". 554 * The program is invoked with one argument containing the boot flags. 555 */ 556 static void 557 start_init(void *arg) 558 { 559 struct lwp *l = arg; 560 struct proc *p = l->l_proc; 561 vaddr_t addr; 562 struct sys_execve_args /* { 563 syscallarg(const char *) path; 564 syscallarg(char * const *) argp; 565 syscallarg(char * const *) envp; 566 } */ args; 567 int options, i, error; 568 register_t retval[2]; 569 char flags[4], *flagsp; 570 const char *path, *slash; 571 char *ucp, **uap, *arg0, *arg1 = NULL; 572 char ipath[129]; 573 int ipx, len; 574 575 /* 576 * Now in process 1. 577 */ 578 strncpy(p->p_comm, "init", MAXCOMLEN); 579 580 /* 581 * Wait for main() to tell us that it's safe to exec. 582 */ 583 while (start_init_exec == 0) 584 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 585 586 /* 587 * This is not the right way to do this. We really should 588 * hand-craft a descriptor onto /dev/console to hand to init, 589 * but that's a _lot_ more work, and the benefit from this easy 590 * hack makes up for the "good is the enemy of the best" effect. 591 */ 592 check_console(l); 593 594 /* 595 * Need just enough stack to hold the faked-up "execve()" arguments. 596 */ 597 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 598 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 599 NULL, UVM_UNKNOWN_OFFSET, 0, 600 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 601 UVM_ADV_NORMAL, 602 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 603 panic("init: couldn't allocate argument space"); 604 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 605 606 ipx = 0; 607 while (1) { 608 if (boothowto & RB_ASKNAME) { 609 printf("init path"); 610 if (initpaths[ipx]) 611 printf(" (default %s)", initpaths[ipx]); 612 printf(": "); 613 len = cngetsn(ipath, sizeof(ipath)-1); 614 if (len == 0) { 615 if (initpaths[ipx]) 616 path = initpaths[ipx++]; 617 else 618 continue; 619 } else { 620 ipath[len] = '\0'; 621 path = ipath; 622 } 623 } else { 624 if ((path = initpaths[ipx++]) == NULL) 625 break; 626 } 627 628 ucp = (char *)USRSTACK; 629 630 /* 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 arg1 = STACK_ALLOC(ucp, i); 658 ucp = STACK_MAX(arg1, i); 659 (void)copyout((caddr_t)flags, arg1, i); 660 } 661 662 /* 663 * Move out the file name (also arg 0). 664 */ 665 i = strlen(path) + 1; 666 #ifdef DEBUG 667 printf("init: copying out path `%s' %d\n", path, i); 668 #else 669 if (boothowto & RB_ASKNAME || path != initpaths[0]) 670 printf("init: trying %s\n", path); 671 #endif 672 arg0 = STACK_ALLOC(ucp, i); 673 ucp = STACK_MAX(arg0, i); 674 (void)copyout(path, arg0, i); 675 676 /* 677 * Move out the arg pointers. 678 */ 679 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 680 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 681 SCARG(&args, path) = arg0; 682 SCARG(&args, argp) = uap; 683 SCARG(&args, envp) = NULL; 684 slash = strrchr(path, '/'); 685 if (slash) 686 (void)suword((caddr_t)uap++, 687 (long)arg0 + (slash + 1 - path)); 688 else 689 (void)suword((caddr_t)uap++, (long)arg0); 690 if (options != 0) 691 (void)suword((caddr_t)uap++, (long)arg1); 692 (void)suword((caddr_t)uap++, 0); /* terminator */ 693 694 /* 695 * Now try to exec the program. If can't for any reason 696 * other than it doesn't exist, complain. 697 */ 698 error = sys_execve(l, &args, retval); 699 if (error == 0 || error == EJUSTRETURN) { 700 KERNEL_PROC_UNLOCK(l); 701 return; 702 } 703 printf("exec %s: error %d\n", path, error); 704 } 705 printf("init: not found\n"); 706 panic("no init"); 707 } 708
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