Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/kern/init_main.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $NetBSD: init_main.c,v 1.283 2006/11/26 16:22:36 elad 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 1.283 2006/11/26 16:22:36 elad 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 #include "opt_pax.h" 86 87 #include "rnd.h" 88 #include "veriexec.h" 89 90 #include <sys/param.h> 91 #include <sys/acct.h> 92 #include <sys/filedesc.h> 93 #include <sys/file.h> 94 #include <sys/errno.h> 95 #include <sys/callout.h> 96 #include <sys/kernel.h> 97 #include <sys/kcont.h> 98 #include <sys/kmem.h> 99 #include <sys/mount.h> 100 #include <sys/proc.h> 101 #include <sys/kthread.h> 102 #include <sys/resourcevar.h> 103 #include <sys/signalvar.h> 104 #include <sys/systm.h> 105 #include <sys/vnode.h> 106 #include <sys/tty.h> 107 #include <sys/conf.h> 108 #include <sys/disklabel.h> 109 #include <sys/buf.h> 110 #include <sys/device.h> 111 #include <sys/exec.h> 112 #include <sys/socketvar.h> 113 #include <sys/protosw.h> 114 #include <sys/reboot.h> 115 #include <sys/user.h> 116 #include <sys/sysctl.h> 117 #include <sys/event.h> 118 #include <sys/mbuf.h> 119 #ifdef FAST_IPSEC 120 #include <netipsec/ipsec.h> 121 #endif 122 #ifdef SYSVSHM 123 #include <sys/shm.h> 124 #endif 125 #ifdef SYSVSEM 126 #include <sys/sem.h> 127 #endif 128 #ifdef SYSVMSG 129 #include <sys/msg.h> 130 #endif 131 #ifdef P1003_1B_SEMAPHORE 132 #include <sys/ksem.h> 133 #endif 134 #include <sys/domain.h> 135 #include <sys/namei.h> 136 #if NRND > 0 137 #include <sys/rnd.h> 138 #endif 139 #ifndef PIPE_SOCKETPAIR 140 #include <sys/pipe.h> 141 #endif 142 #ifdef LKM 143 #include <sys/lkm.h> 144 #endif 145 #if NVERIEXEC > 0 146 #include <sys/verified_exec.h> 147 #endif /* NVERIEXEC > 0 */ 148 #include <sys/kauth.h> 149 #include <net80211/ieee80211_netbsd.h> 150 151 #include <sys/syscall.h> 152 #include <sys/sa.h> 153 #include <sys/syscallargs.h> 154 155 #ifdef FILEASSOC 156 #include <sys/fileassoc.h> 157 #endif /* FILEASSOC */ 158 159 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 160 #include <sys/pax.h> 161 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 162 #include <ufs/ufs/quota.h> 163 164 #include <miscfs/genfs/genfs.h> 165 #include <miscfs/syncfs/syncfs.h> 166 167 #include <machine/cpu.h> 168 169 #include <uvm/uvm.h> 170 171 #include <dev/cons.h> 172 173 #include <net/if.h> 174 #include <net/raw_cb.h> 175 176 #include <secmodel/secmodel.h> 177 178 extern struct proc proc0; 179 extern struct lwp lwp0; 180 extern struct cwdinfo cwdi0; 181 182 #ifndef curlwp 183 struct lwp *curlwp = &lwp0; 184 #endif 185 struct proc *initproc; 186 187 struct vnode *rootvp, *swapdev_vp; 188 int boothowto; 189 int cold = 1; /* still working on startup */ 190 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 191 time_t rootfstime; /* recorded root fs time, if known */ 192 193 volatile int start_init_exec; /* semaphore for start_init() */ 194 195 static void check_console(struct lwp *l); 196 static void start_init(void *); 197 void main(void); 198 199 #if defined(__SSP__) || defined(__SSP_ALL__) 200 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 201 void __stack_chk_fail(void); 202 203 void 204 __stack_chk_fail(void) 205 { 206 panic("stack overflow detected; terminated"); 207 } 208 #endif 209 210 /* 211 * System startup; initialize the world, create process 0, mount root 212 * filesystem, and fork to create init and pagedaemon. Most of the 213 * hard work is done in the lower-level initialization routines including 214 * startup(), which does memory initialization and autoconfiguration. 215 */ 216 void 217 main(void) 218 { 219 #ifdef __HAVE_TIMECOUNTER 220 struct timeval time; 221 #endif 222 struct lwp *l; 223 struct proc *p; 224 struct pdevinit *pdev; 225 int s, error; 226 extern struct pdevinit pdevinit[]; 227 extern void schedcpu(void *); 228 #ifdef NVNODE_IMPLICIT 229 int usevnodes; 230 #endif 231 232 /* 233 * Initialize the current LWP pointer (curlwp) before 234 * any possible traps/probes to simplify trap processing. 235 */ 236 l = &lwp0; 237 curlwp = l; 238 l->l_cpu = curcpu(); 239 l->l_proc = &proc0; 240 l->l_lid = 1; 241 242 /* 243 * Attempt to find console and initialize 244 * in case of early panic or other messages. 245 */ 246 consinit(); 247 248 KERNEL_LOCK_INIT(); 249 250 uvm_init(); 251 252 kmem_init(); 253 254 /* Do machine-dependent initialization. */ 255 cpu_startup(); 256 257 /* Initialize callouts. */ 258 callout_startup(); 259 260 /* Initialize the buffer cache */ 261 bufinit(); 262 263 /* 264 * Initialize mbuf's. Do this now because we might attempt to 265 * allocate mbufs or mbuf clusters during autoconfiguration. 266 */ 267 mbinit(); 268 269 /* Initialize sockets. */ 270 soinit(); 271 272 #ifdef KCONT 273 /* Initialize kcont. */ 274 kcont_init(); 275 #endif 276 277 /* 278 * The following things must be done before autoconfiguration. 279 */ 280 evcnt_init(); /* initialize event counters */ 281 #if NRND > 0 282 rnd_init(); /* initialize RNG */ 283 #endif 284 /* Initialize the sysctl subsystem. */ 285 sysctl_init(); 286 287 /* Initialize process and pgrp structures. */ 288 procinit(); 289 lwpinit(); 290 291 /* Initialize signal-related data structures. */ 292 signal_init(); 293 294 /* Create process 0 (the swapper). */ 295 proc0_init(); 296 297 /* 298 * Charge root for one process. 299 */ 300 (void)chgproccnt(0, 1); 301 302 rqinit(); 303 304 /* Initialize the file systems. */ 305 #ifdef NVNODE_IMPLICIT 306 /* 307 * If maximum number of vnodes in namei vnode cache is not explicitly 308 * defined in kernel config, adjust the number such as we use roughly 309 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 310 */ 311 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 312 if (usevnodes > desiredvnodes) 313 desiredvnodes = usevnodes; 314 #endif 315 vfsinit(); 316 317 318 #ifdef __HAVE_TIMECOUNTER 319 inittimecounter(); 320 ntp_init(); 321 #endif /* __HAVE_TIMECOUNTER */ 322 323 /* Initialize kauth. */ 324 kauth_init(); 325 326 /* Configure the system hardware. This will enable interrupts. */ 327 configure(); 328 329 #if defined(__SSP__) || defined(__SSP_ALL__) 330 { 331 #ifdef DIAGNOSTIC 332 printf("Initializing SSP:"); 333 #endif 334 /* 335 * We initialize ssp here carefully: 336 * 1. after we got some entropy 337 * 2. without calling a function 338 */ 339 size_t i; 340 long guard[__arraycount(__stack_chk_guard)]; 341 342 arc4randbytes(guard, sizeof(guard)); 343 for (i = 0; i < __arraycount(guard); i++) 344 __stack_chk_guard[i] = guard[i]; 345 #ifdef DIAGNOSTIC 346 for (i = 0; i < __arraycount(guard); i++) 347 printf("%lx ", guard[i]); 348 printf("\n"); 349 #endif 350 } 351 #endif 352 ubc_init(); /* must be after autoconfig */ 353 354 /* Lock the kernel on behalf of proc0. */ 355 KERNEL_PROC_LOCK(l); 356 357 #ifdef SYSVSHM 358 /* Initialize System V style shared memory. */ 359 shminit(); 360 #endif 361 362 #ifdef SYSVSEM 363 /* Initialize System V style semaphores. */ 364 seminit(); 365 #endif 366 367 #ifdef SYSVMSG 368 /* Initialize System V style message queues. */ 369 msginit(); 370 #endif 371 372 #ifdef P1003_1B_SEMAPHORE 373 /* Initialize posix semaphores */ 374 ksem_init(); 375 #endif 376 377 /* Initialize default security model. */ 378 secmodel_start(); 379 380 #ifdef FILEASSOC 381 fileassoc_init(); 382 #endif /* FILEASSOC */ 383 384 #if NVERIEXEC > 0 385 /* 386 * Initialise the Veriexec subsystem. 387 */ 388 veriexec_init(); 389 #endif /* NVERIEXEC > 0 */ 390 391 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 392 pax_init(); 393 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 394 395 /* Attach pseudo-devices. */ 396 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 397 (*pdev->pdev_attach)(pdev->pdev_count); 398 399 #ifdef FAST_IPSEC 400 /* Attach network crypto subsystem */ 401 ipsec_attach(); 402 #endif 403 404 /* 405 * Initialize protocols. Block reception of incoming packets 406 * until everything is ready. 407 */ 408 s = splnet(); 409 ifinit(); 410 domaininit(); 411 if_attachdomain(); 412 splx(s); 413 414 #ifdef GPROF 415 /* Initialize kernel profiling. */ 416 kmstartup(); 417 #endif 418 419 /* Initialize system accouting. */ 420 acct_init(); 421 422 /* Kick off timeout driven events by calling first time. */ 423 schedcpu(NULL); 424 425 /* 426 * Create process 1 (init(8)). We do this now, as Unix has 427 * historically had init be process 1, and changing this would 428 * probably upset a lot of people. 429 * 430 * Note that process 1 won't immediately exec init(8), but will 431 * wait for us to inform it that the root file system has been 432 * mounted. 433 */ 434 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 435 panic("fork init"); 436 437 /* 438 * Create any kernel threads who's creation was deferred because 439 * initproc had not yet been created. 440 */ 441 kthread_run_deferred_queue(); 442 443 /* 444 * Now that device driver threads have been created, wait for 445 * them to finish any deferred autoconfiguration. Note we don't 446 * need to lock this semaphore, since we haven't booted any 447 * secondary processors, yet. 448 */ 449 while (config_pending) 450 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 451 452 /* 453 * Finalize configuration now that all real devices have been 454 * found. This needs to be done before the root device is 455 * selected, since finalization may create the root device. 456 */ 457 config_finalize(); 458 459 /* 460 * Now that autoconfiguration has completed, we can determine 461 * the root and dump devices. 462 */ 463 cpu_rootconf(); 464 cpu_dumpconf(); 465 466 /* Mount the root file system. */ 467 do { 468 domountroothook(); 469 if ((error = vfs_mountroot())) { 470 printf("cannot mount root, error = %d\n", error); 471 boothowto |= RB_ASKNAME; 472 setroot(root_device, 473 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 474 } 475 } while (error != 0); 476 mountroothook_destroy(); 477 478 /* 479 * Initialise the time-of-day clock, passing the time recorded 480 * in the root filesystem (if any) for use by systems that 481 * don't have a non-volatile time-of-day device. 482 */ 483 inittodr(rootfstime); 484 485 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 486 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 487 488 /* 489 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 490 * reference it. 491 */ 492 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 493 if (error) 494 panic("cannot find root vnode, error=%d", error); 495 cwdi0.cwdi_cdir = rootvnode; 496 VREF(cwdi0.cwdi_cdir); 497 VOP_UNLOCK(rootvnode, 0); 498 cwdi0.cwdi_rdir = NULL; 499 500 /* 501 * Now that root is mounted, we can fixup initproc's CWD 502 * info. All other processes are kthreads, which merely 503 * share proc0's CWD info. 504 */ 505 initproc->p_cwdi->cwdi_cdir = rootvnode; 506 VREF(initproc->p_cwdi->cwdi_cdir); 507 initproc->p_cwdi->cwdi_rdir = NULL; 508 509 /* 510 * Now can look at time, having had a chance to verify the time 511 * from the file system. Reset p->p_rtime as it may have been 512 * munched in mi_switch() after the time got set. 513 */ 514 proclist_lock_read(); 515 s = splsched(); 516 #ifdef __HAVE_TIMECOUNTER 517 getmicrotime(&time); 518 #else 519 mono_time = time; 520 #endif 521 boottime = time; 522 LIST_FOREACH(p, &allproc, p_list) { 523 KASSERT((p->p_flag & P_MARKER) == 0); 524 p->p_stats->p_start = time; 525 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 526 if (l->l_cpu != NULL) 527 l->l_cpu->ci_schedstate.spc_runtime = time; 528 } 529 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 530 } 531 splx(s); 532 proclist_unlock_read(); 533 534 /* Create the pageout daemon kernel thread. */ 535 uvm_swap_init(); 536 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 537 panic("fork pagedaemon"); 538 539 /* Create the filesystem syncer kernel thread. */ 540 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 541 panic("fork syncer"); 542 543 /* Create the aiodone daemon kernel thread. */ 544 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 545 "aiodoned")) 546 panic("fork aiodoned"); 547 548 #if defined(MULTIPROCESSOR) 549 /* Boot the secondary processors. */ 550 cpu_boot_secondary_processors(); 551 #endif 552 553 /* Initialize exec structures */ 554 exec_init(1); 555 556 /* 557 * Okay, now we can let init(8) exec! It's off to userland! 558 */ 559 start_init_exec = 1; 560 wakeup(&start_init_exec); 561 562 /* The scheduler is an infinite loop. */ 563 uvm_scheduler(); 564 /* NOTREACHED */ 565 } 566 567 void 568 setrootfstime(time_t t) 569 { 570 rootfstime = t; 571 } 572 573 static void 574 check_console(struct lwp *l) 575 { 576 struct nameidata nd; 577 int error; 578 579 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 580 error = namei(&nd); 581 if (error == 0) 582 vrele(nd.ni_vp); 583 else if (error == ENOENT) 584 printf("warning: no /dev/console\n"); 585 else 586 printf("warning: lookup /dev/console: error %d\n", error); 587 } 588 589 /* 590 * List of paths to try when searching for "init". 591 */ 592 static const char *initpaths[] = { 593 "/sbin/init", 594 "/sbin/oinit", 595 "/sbin/init.bak", 596 NULL, 597 }; 598 599 /* 600 * Start the initial user process; try exec'ing each pathname in "initpaths". 601 * The program is invoked with one argument containing the boot flags. 602 */ 603 static void 604 start_init(void *arg) 605 { 606 struct lwp *l = arg; 607 struct proc *p = l->l_proc; 608 vaddr_t addr; 609 struct sys_execve_args /* { 610 syscallarg(const char *) path; 611 syscallarg(char * const *) argp; 612 syscallarg(char * const *) envp; 613 } */ args; 614 int options, i, error; 615 register_t retval[2]; 616 char flags[4], *flagsp; 617 const char *path, *slash; 618 char *ucp, **uap, *arg0, *arg1 = NULL; 619 char ipath[129]; 620 int ipx, len; 621 622 /* 623 * Now in process 1. 624 */ 625 strncpy(p->p_comm, "init", MAXCOMLEN); 626 627 /* 628 * Wait for main() to tell us that it's safe to exec. 629 */ 630 while (start_init_exec == 0) 631 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 632 633 /* 634 * This is not the right way to do this. We really should 635 * hand-craft a descriptor onto /dev/console to hand to init, 636 * but that's a _lot_ more work, and the benefit from this easy 637 * hack makes up for the "good is the enemy of the best" effect. 638 */ 639 check_console(l); 640 641 /* 642 * Need just enough stack to hold the faked-up "execve()" arguments. 643 */ 644 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 645 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 646 NULL, UVM_UNKNOWN_OFFSET, 0, 647 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 648 UVM_ADV_NORMAL, 649 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 650 panic("init: couldn't allocate argument space"); 651 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 652 653 ipx = 0; 654 while (1) { 655 if (boothowto & RB_ASKNAME) { 656 printf("init path"); 657 if (initpaths[ipx]) 658 printf(" (default %s)", initpaths[ipx]); 659 printf(": "); 660 len = cngetsn(ipath, sizeof(ipath)-1); 661 if (len == 0) { 662 if (initpaths[ipx]) 663 path = initpaths[ipx++]; 664 else 665 continue; 666 } else { 667 ipath[len] = '\0'; 668 path = ipath; 669 } 670 } else { 671 if ((path = initpaths[ipx++]) == NULL) 672 break; 673 } 674 675 ucp = (char *)USRSTACK; 676 677 /* 678 * Construct the boot flag argument. 679 */ 680 flagsp = flags; 681 *flagsp++ = '-'; 682 options = 0; 683 684 if (boothowto & RB_SINGLE) { 685 *flagsp++ = 's'; 686 options = 1; 687 } 688 #ifdef notyet 689 if (boothowto & RB_FASTBOOT) { 690 *flagsp++ = 'f'; 691 options = 1; 692 } 693 #endif 694 695 /* 696 * Move out the flags (arg 1), if necessary. 697 */ 698 if (options != 0) { 699 *flagsp++ = '\0'; 700 i = flagsp - flags; 701 #ifdef DEBUG 702 printf("init: copying out flags `%s' %d\n", flags, i); 703 #endif 704 arg1 = STACK_ALLOC(ucp, i); 705 ucp = STACK_MAX(arg1, i); 706 (void)copyout((caddr_t)flags, arg1, i); 707 } 708 709 /* 710 * Move out the file name (also arg 0). 711 */ 712 i = strlen(path) + 1; 713 #ifdef DEBUG 714 printf("init: copying out path `%s' %d\n", path, i); 715 #else 716 if (boothowto & RB_ASKNAME || path != initpaths[0]) 717 printf("init: trying %s\n", path); 718 #endif 719 arg0 = STACK_ALLOC(ucp, i); 720 ucp = STACK_MAX(arg0, i); 721 (void)copyout(path, arg0, i); 722 723 /* 724 * Move out the arg pointers. 725 */ 726 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 727 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 728 SCARG(&args, path) = arg0; 729 SCARG(&args, argp) = uap; 730 SCARG(&args, envp) = NULL; 731 slash = strrchr(path, '/'); 732 if (slash) 733 (void)suword((caddr_t)uap++, 734 (long)arg0 + (slash + 1 - path)); 735 else 736 (void)suword((caddr_t)uap++, (long)arg0); 737 if (options != 0) 738 (void)suword((caddr_t)uap++, (long)arg1); 739 (void)suword((caddr_t)uap++, 0); /* terminator */ 740 741 /* 742 * Now try to exec the program. If can't for any reason 743 * other than it doesn't exist, complain. 744 */ 745 error = sys_execve(l, &args, retval); 746 if (error == 0 || error == EJUSTRETURN) { 747 KERNEL_PROC_UNLOCK(l); 748 return; 749 } 750 printf("exec %s: error %d\n", path, error); 751 } 752 printf("init: not found\n"); 753 panic("no init"); 754 }
Cache object: 4ce4fee73e8dbbe989121a7be329b1b3
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]