init_main.c revision 1.279
1 /* $NetBSD: init_main.c,v 1.279 2006/10/08 04:28:44 thorpej 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 1.279 2006/10/08 04:28:44 thorpej 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_fileassoc.h" 85 86 #include "rnd.h" 87 #include "veriexec.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 #if NVERIEXEC > 0 145 #include <sys/verified_exec.h> 146 #endif /* NVERIEXEC > 0 */ 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 #include <secmodel/secmodel.h> 173 174 extern struct proc proc0; 175 extern struct lwp lwp0; 176 extern struct cwdinfo cwdi0; 177 178 #ifndef curlwp 179 struct lwp *curlwp = &lwp0; 180 #endif 181 struct proc *initproc; 182 183 struct vnode *rootvp, *swapdev_vp; 184 int boothowto; 185 int cold = 1; /* still working on startup */ 186 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 187 time_t rootfstime; /* recorded root fs time, if known */ 188 189 volatile int start_init_exec; /* semaphore for start_init() */ 190 191 static void check_console(struct lwp *l); 192 static void start_init(void *); 193 void main(void); 194 195 /* 196 * System startup; initialize the world, create process 0, mount root 197 * filesystem, and fork to create init and pagedaemon. Most of the 198 * hard work is done in the lower-level initialization routines including 199 * startup(), which does memory initialization and autoconfiguration. 200 */ 201 void 202 main(void) 203 { 204 #ifdef __HAVE_TIMECOUNTER 205 struct timeval time; 206 #endif 207 struct lwp *l; 208 struct proc *p; 209 struct pdevinit *pdev; 210 int s, error; 211 extern struct pdevinit pdevinit[]; 212 extern void schedcpu(void *); 213 #ifdef NVNODE_IMPLICIT 214 int usevnodes; 215 #endif 216 217 /* 218 * Initialize the current LWP pointer (curlwp) before 219 * any possible traps/probes to simplify trap processing. 220 */ 221 l = &lwp0; 222 curlwp = l; 223 l->l_cpu = curcpu(); 224 l->l_proc = &proc0; 225 l->l_lid = 1; 226 227 /* 228 * Attempt to find console and initialize 229 * in case of early panic or other messages. 230 */ 231 consinit(); 232 233 KERNEL_LOCK_INIT(); 234 235 uvm_init(); 236 237 kmem_init(); 238 239 /* Do machine-dependent initialization. */ 240 cpu_startup(); 241 242 /* Initialize callouts. */ 243 callout_startup(); 244 245 /* Initialize the buffer cache */ 246 bufinit(); 247 248 /* 249 * Initialize mbuf's. Do this now because we might attempt to 250 * allocate mbufs or mbuf clusters during autoconfiguration. 251 */ 252 mbinit(); 253 254 /* Initialize sockets. */ 255 soinit(); 256 257 #ifdef KCONT 258 /* Initialize kcont. */ 259 kcont_init(); 260 #endif 261 262 /* 263 * The following things must be done before autoconfiguration. 264 */ 265 evcnt_init(); /* initialize event counters */ 266 #if NRND > 0 267 rnd_init(); /* initialize RNG */ 268 #endif 269 /* Initialize the sysctl subsystem. */ 270 sysctl_init(); 271 272 /* Initialize process and pgrp structures. */ 273 procinit(); 274 lwpinit(); 275 276 /* Initialize signal-related data structures. */ 277 signal_init(); 278 279 /* Create process 0 (the swapper). */ 280 proc0_init(); 281 282 /* 283 * Charge root for one process. 284 */ 285 (void)chgproccnt(0, 1); 286 287 rqinit(); 288 289 /* Initialize the file systems. */ 290 #ifdef NVNODE_IMPLICIT 291 /* 292 * If maximum number of vnodes in namei vnode cache is not explicitly 293 * defined in kernel config, adjust the number such as we use roughly 294 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 295 */ 296 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 297 if (usevnodes > desiredvnodes) 298 desiredvnodes = usevnodes; 299 #endif 300 vfsinit(); 301 302 303 #ifdef __HAVE_TIMECOUNTER 304 inittimecounter(); 305 ntp_init(); 306 #endif /* __HAVE_TIMECOUNTER */ 307 308 /* Initialize kauth. */ 309 kauth_init(); 310 311 /* Configure the system hardware. This will enable interrupts. */ 312 configure(); 313 314 ubc_init(); /* must be after autoconfig */ 315 316 /* Lock the kernel on behalf of proc0. */ 317 KERNEL_PROC_LOCK(l); 318 319 #ifdef SYSVSHM 320 /* Initialize System V style shared memory. */ 321 shminit(); 322 #endif 323 324 #ifdef SYSVSEM 325 /* Initialize System V style semaphores. */ 326 seminit(); 327 #endif 328 329 #ifdef SYSVMSG 330 /* Initialize System V style message queues. */ 331 msginit(); 332 #endif 333 334 #ifdef P1003_1B_SEMAPHORE 335 /* Initialize posix semaphores */ 336 ksem_init(); 337 #endif 338 339 /* Initialize default security model. */ 340 secmodel_start(); 341 342 #ifdef FILEASSOC 343 fileassoc_init(); 344 #endif /* FILEASSOC */ 345 346 #if NVERIEXEC > 0 347 /* 348 * Initialise the fingerprint operations vectors before 349 * fingerprints can be loaded. 350 */ 351 veriexec_init_fp_ops(); 352 #endif /* NVERIEXEC > 0 */ 353 354 /* Attach pseudo-devices. */ 355 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 356 (*pdev->pdev_attach)(pdev->pdev_count); 357 358 #ifdef FAST_IPSEC 359 /* Attach network crypto subsystem */ 360 ipsec_attach(); 361 #endif 362 363 /* 364 * Initialize protocols. Block reception of incoming packets 365 * until everything is ready. 366 */ 367 s = splnet(); 368 ifinit(); 369 domaininit(); 370 if_attachdomain(); 371 splx(s); 372 373 #ifdef GPROF 374 /* Initialize kernel profiling. */ 375 kmstartup(); 376 #endif 377 378 /* Initialize system accouting. */ 379 acct_init(); 380 381 /* Kick off timeout driven events by calling first time. */ 382 schedcpu(NULL); 383 384 /* 385 * Create process 1 (init(8)). We do this now, as Unix has 386 * historically had init be process 1, and changing this would 387 * probably upset a lot of people. 388 * 389 * Note that process 1 won't immediately exec init(8), but will 390 * wait for us to inform it that the root file system has been 391 * mounted. 392 */ 393 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 394 panic("fork init"); 395 396 /* 397 * Create any kernel threads who's creation was deferred because 398 * initproc had not yet been created. 399 */ 400 kthread_run_deferred_queue(); 401 402 /* 403 * Now that device driver threads have been created, wait for 404 * them to finish any deferred autoconfiguration. Note we don't 405 * need to lock this semaphore, since we haven't booted any 406 * secondary processors, yet. 407 */ 408 while (config_pending) 409 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 410 411 /* 412 * Finalize configuration now that all real devices have been 413 * found. This needs to be done before the root device is 414 * selected, since finalization may create the root device. 415 */ 416 config_finalize(); 417 418 /* 419 * Now that autoconfiguration has completed, we can determine 420 * the root and dump devices. 421 */ 422 cpu_rootconf(); 423 cpu_dumpconf(); 424 425 /* Mount the root file system. */ 426 do { 427 domountroothook(); 428 if ((error = vfs_mountroot())) { 429 printf("cannot mount root, error = %d\n", error); 430 boothowto |= RB_ASKNAME; 431 setroot(root_device, 432 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 433 } 434 } while (error != 0); 435 mountroothook_destroy(); 436 437 /* 438 * Initialise the time-of-day clock, passing the time recorded 439 * in the root filesystem (if any) for use by systems that 440 * don't have a non-volatile time-of-day device. 441 */ 442 inittodr(rootfstime); 443 444 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 445 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 446 447 /* 448 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 449 * reference it. 450 */ 451 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 452 if (error) 453 panic("cannot find root vnode, error=%d", error); 454 cwdi0.cwdi_cdir = rootvnode; 455 VREF(cwdi0.cwdi_cdir); 456 VOP_UNLOCK(rootvnode, 0); 457 cwdi0.cwdi_rdir = NULL; 458 459 /* 460 * Now that root is mounted, we can fixup initproc's CWD 461 * info. All other processes are kthreads, which merely 462 * share proc0's CWD info. 463 */ 464 initproc->p_cwdi->cwdi_cdir = rootvnode; 465 VREF(initproc->p_cwdi->cwdi_cdir); 466 initproc->p_cwdi->cwdi_rdir = NULL; 467 468 /* 469 * Now can look at time, having had a chance to verify the time 470 * from the file system. Reset p->p_rtime as it may have been 471 * munched in mi_switch() after the time got set. 472 */ 473 proclist_lock_read(); 474 s = splsched(); 475 #ifdef __HAVE_TIMECOUNTER 476 getmicrotime(&time); 477 #else 478 mono_time = time; 479 #endif 480 boottime = time; 481 LIST_FOREACH(p, &allproc, p_list) { 482 KASSERT((p->p_flag & P_MARKER) == 0); 483 p->p_stats->p_start = time; 484 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 485 if (l->l_cpu != NULL) 486 l->l_cpu->ci_schedstate.spc_runtime = time; 487 } 488 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 489 } 490 splx(s); 491 proclist_unlock_read(); 492 493 /* Create the pageout daemon kernel thread. */ 494 uvm_swap_init(); 495 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 496 panic("fork pagedaemon"); 497 498 /* Create the filesystem syncer kernel thread. */ 499 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 500 panic("fork syncer"); 501 502 /* Create the aiodone daemon kernel thread. */ 503 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 504 "aiodoned")) 505 panic("fork aiodoned"); 506 507 #if defined(MULTIPROCESSOR) 508 /* Boot the secondary processors. */ 509 cpu_boot_secondary_processors(); 510 #endif 511 512 /* Initialize exec structures */ 513 exec_init(1); 514 515 /* 516 * Okay, now we can let init(8) exec! It's off to userland! 517 */ 518 start_init_exec = 1; 519 wakeup(&start_init_exec); 520 521 /* The scheduler is an infinite loop. */ 522 uvm_scheduler(); 523 /* NOTREACHED */ 524 } 525 526 void 527 setrootfstime(time_t t) 528 { 529 rootfstime = t; 530 } 531 532 static void 533 check_console(struct lwp *l) 534 { 535 struct nameidata nd; 536 int error; 537 538 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 539 error = namei(&nd); 540 if (error == 0) 541 vrele(nd.ni_vp); 542 else if (error == ENOENT) 543 printf("warning: no /dev/console\n"); 544 else 545 printf("warning: lookup /dev/console: error %d\n", error); 546 } 547 548 /* 549 * List of paths to try when searching for "init". 550 */ 551 static const char *initpaths[] = { 552 "/sbin/init", 553 "/sbin/oinit", 554 "/sbin/init.bak", 555 NULL, 556 }; 557 558 /* 559 * Start the initial user process; try exec'ing each pathname in "initpaths". 560 * The program is invoked with one argument containing the boot flags. 561 */ 562 static void 563 start_init(void *arg) 564 { 565 struct lwp *l = arg; 566 struct proc *p = l->l_proc; 567 vaddr_t addr; 568 struct sys_execve_args /* { 569 syscallarg(const char *) path; 570 syscallarg(char * const *) argp; 571 syscallarg(char * const *) envp; 572 } */ args; 573 int options, i, error; 574 register_t retval[2]; 575 char flags[4], *flagsp; 576 const char *path, *slash; 577 char *ucp, **uap, *arg0, *arg1 = NULL; 578 char ipath[129]; 579 int ipx, len; 580 581 /* 582 * Now in process 1. 583 */ 584 strncpy(p->p_comm, "init", MAXCOMLEN); 585 586 /* 587 * Wait for main() to tell us that it's safe to exec. 588 */ 589 while (start_init_exec == 0) 590 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 591 592 /* 593 * This is not the right way to do this. We really should 594 * hand-craft a descriptor onto /dev/console to hand to init, 595 * but that's a _lot_ more work, and the benefit from this easy 596 * hack makes up for the "good is the enemy of the best" effect. 597 */ 598 check_console(l); 599 600 /* 601 * Need just enough stack to hold the faked-up "execve()" arguments. 602 */ 603 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 604 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 605 NULL, UVM_UNKNOWN_OFFSET, 0, 606 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 607 UVM_ADV_NORMAL, 608 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 609 panic("init: couldn't allocate argument space"); 610 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 611 612 ipx = 0; 613 while (1) { 614 if (boothowto & RB_ASKNAME) { 615 printf("init path"); 616 if (initpaths[ipx]) 617 printf(" (default %s)", initpaths[ipx]); 618 printf(": "); 619 len = cngetsn(ipath, sizeof(ipath)-1); 620 if (len == 0) { 621 if (initpaths[ipx]) 622 path = initpaths[ipx++]; 623 else 624 continue; 625 } else { 626 ipath[len] = '\0'; 627 path = ipath; 628 } 629 } else { 630 if ((path = initpaths[ipx++]) == NULL) 631 break; 632 } 633 634 ucp = (char *)USRSTACK; 635 636 /* 637 * Construct the boot flag argument. 638 */ 639 flagsp = flags; 640 *flagsp++ = '-'; 641 options = 0; 642 643 if (boothowto & RB_SINGLE) { 644 *flagsp++ = 's'; 645 options = 1; 646 } 647 #ifdef notyet 648 if (boothowto & RB_FASTBOOT) { 649 *flagsp++ = 'f'; 650 options = 1; 651 } 652 #endif 653 654 /* 655 * Move out the flags (arg 1), if necessary. 656 */ 657 if (options != 0) { 658 *flagsp++ = '\0'; 659 i = flagsp - flags; 660 #ifdef DEBUG 661 printf("init: copying out flags `%s' %d\n", flags, i); 662 #endif 663 arg1 = STACK_ALLOC(ucp, i); 664 ucp = STACK_MAX(arg1, i); 665 (void)copyout((caddr_t)flags, arg1, i); 666 } 667 668 /* 669 * Move out the file name (also arg 0). 670 */ 671 i = strlen(path) + 1; 672 #ifdef DEBUG 673 printf("init: copying out path `%s' %d\n", path, i); 674 #else 675 if (boothowto & RB_ASKNAME || path != initpaths[0]) 676 printf("init: trying %s\n", path); 677 #endif 678 arg0 = STACK_ALLOC(ucp, i); 679 ucp = STACK_MAX(arg0, i); 680 (void)copyout(path, arg0, i); 681 682 /* 683 * Move out the arg pointers. 684 */ 685 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 686 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 687 SCARG(&args, path) = arg0; 688 SCARG(&args, argp) = uap; 689 SCARG(&args, envp) = NULL; 690 slash = strrchr(path, '/'); 691 if (slash) 692 (void)suword((caddr_t)uap++, 693 (long)arg0 + (slash + 1 - path)); 694 else 695 (void)suword((caddr_t)uap++, (long)arg0); 696 if (options != 0) 697 (void)suword((caddr_t)uap++, (long)arg1); 698 (void)suword((caddr_t)uap++, 0); /* terminator */ 699 700 /* 701 * Now try to exec the program. If can't for any reason 702 * other than it doesn't exist, complain. 703 */ 704 error = sys_execve(l, &args, retval); 705 if (error == 0 || error == EJUSTRETURN) { 706 KERNEL_PROC_UNLOCK(l); 707 return; 708 } 709 printf("exec %s: error %d\n", path, error); 710 } 711 printf("init: not found\n"); 712 panic("no init"); 713 } 714
Indexes created Sun Sep 21 20:09:37 GMT 2025