init_main.c revision 1.281
1 /* $NetBSD: init_main.c,v 1.281 2006/11/22 00:41:38 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 1.281 2006/11/22 00:41:38 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) 160 #include <sys/pax.h> 161 #endif /* PAX_MPROTECT */ 162 163 #include <ufs/ufs/quota.h> 164 165 #include <miscfs/genfs/genfs.h> 166 #include <miscfs/syncfs/syncfs.h> 167 168 #include <machine/cpu.h> 169 170 #include <uvm/uvm.h> 171 172 #include <dev/cons.h> 173 174 #include <net/if.h> 175 #include <net/raw_cb.h> 176 177 #include <secmodel/secmodel.h> 178 179 extern struct proc proc0; 180 extern struct lwp lwp0; 181 extern struct cwdinfo cwdi0; 182 183 #ifndef curlwp 184 struct lwp *curlwp = &lwp0; 185 #endif 186 struct proc *initproc; 187 188 struct vnode *rootvp, *swapdev_vp; 189 int boothowto; 190 int cold = 1; /* still working on startup */ 191 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 192 time_t rootfstime; /* recorded root fs time, if known */ 193 194 volatile int start_init_exec; /* semaphore for start_init() */ 195 196 static void check_console(struct lwp *l); 197 static void start_init(void *); 198 void main(void); 199 200 #if defined(__SSP__) || defined(__SSP_ALL__) 201 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 202 void __stack_chk_fail(void); 203 204 void 205 __stack_chk_fail(void) 206 { 207 panic("stack overflow detected; terminated"); 208 } 209 #endif 210 211 /* 212 * System startup; initialize the world, create process 0, mount root 213 * filesystem, and fork to create init and pagedaemon. Most of the 214 * hard work is done in the lower-level initialization routines including 215 * startup(), which does memory initialization and autoconfiguration. 216 */ 217 void 218 main(void) 219 { 220 #ifdef __HAVE_TIMECOUNTER 221 struct timeval time; 222 #endif 223 struct lwp *l; 224 struct proc *p; 225 struct pdevinit *pdev; 226 int s, error; 227 extern struct pdevinit pdevinit[]; 228 extern void schedcpu(void *); 229 #ifdef NVNODE_IMPLICIT 230 int usevnodes; 231 #endif 232 233 /* 234 * Initialize the current LWP pointer (curlwp) before 235 * any possible traps/probes to simplify trap processing. 236 */ 237 l = &lwp0; 238 curlwp = l; 239 l->l_cpu = curcpu(); 240 l->l_proc = &proc0; 241 l->l_lid = 1; 242 243 /* 244 * Attempt to find console and initialize 245 * in case of early panic or other messages. 246 */ 247 consinit(); 248 249 KERNEL_LOCK_INIT(); 250 251 uvm_init(); 252 253 kmem_init(); 254 255 /* Do machine-dependent initialization. */ 256 cpu_startup(); 257 258 /* Initialize callouts. */ 259 callout_startup(); 260 261 /* Initialize the buffer cache */ 262 bufinit(); 263 264 /* 265 * Initialize mbuf's. Do this now because we might attempt to 266 * allocate mbufs or mbuf clusters during autoconfiguration. 267 */ 268 mbinit(); 269 270 /* Initialize sockets. */ 271 soinit(); 272 273 #ifdef KCONT 274 /* Initialize kcont. */ 275 kcont_init(); 276 #endif 277 278 /* 279 * The following things must be done before autoconfiguration. 280 */ 281 evcnt_init(); /* initialize event counters */ 282 #if NRND > 0 283 rnd_init(); /* initialize RNG */ 284 #endif 285 /* Initialize the sysctl subsystem. */ 286 sysctl_init(); 287 288 /* Initialize process and pgrp structures. */ 289 procinit(); 290 lwpinit(); 291 292 /* Initialize signal-related data structures. */ 293 signal_init(); 294 295 /* Create process 0 (the swapper). */ 296 proc0_init(); 297 298 /* 299 * Charge root for one process. 300 */ 301 (void)chgproccnt(0, 1); 302 303 rqinit(); 304 305 /* Initialize the file systems. */ 306 #ifdef NVNODE_IMPLICIT 307 /* 308 * If maximum number of vnodes in namei vnode cache is not explicitly 309 * defined in kernel config, adjust the number such as we use roughly 310 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 311 */ 312 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 313 if (usevnodes > desiredvnodes) 314 desiredvnodes = usevnodes; 315 #endif 316 vfsinit(); 317 318 319 #ifdef __HAVE_TIMECOUNTER 320 inittimecounter(); 321 ntp_init(); 322 #endif /* __HAVE_TIMECOUNTER */ 323 324 /* Initialize kauth. */ 325 kauth_init(); 326 327 /* Configure the system hardware. This will enable interrupts. */ 328 configure(); 329 330 #if defined(__SSP__) || defined(__SSP_ALL__) 331 { 332 #ifdef DIAGNOSTIC 333 printf("Initializing SSP:"); 334 #endif 335 /* 336 * We initialize ssp here carefully: 337 * 1. after we got some entropy 338 * 2. without calling a function 339 */ 340 size_t i; 341 long guard[__arraycount(__stack_chk_guard)]; 342 343 arc4randbytes(guard, sizeof(guard)); 344 for (i = 0; i < __arraycount(guard); i++) 345 __stack_chk_guard[i] = guard[i]; 346 #ifdef DIAGNOSTIC 347 for (i = 0; i < __arraycount(guard); i++) 348 printf("%lx ", guard[i]); 349 printf("\n"); 350 #endif 351 } 352 #endif 353 ubc_init(); /* must be after autoconfig */ 354 355 /* Lock the kernel on behalf of proc0. */ 356 KERNEL_PROC_LOCK(l); 357 358 #ifdef SYSVSHM 359 /* Initialize System V style shared memory. */ 360 shminit(); 361 #endif 362 363 #ifdef SYSVSEM 364 /* Initialize System V style semaphores. */ 365 seminit(); 366 #endif 367 368 #ifdef SYSVMSG 369 /* Initialize System V style message queues. */ 370 msginit(); 371 #endif 372 373 #ifdef P1003_1B_SEMAPHORE 374 /* Initialize posix semaphores */ 375 ksem_init(); 376 #endif 377 378 /* Initialize default security model. */ 379 secmodel_start(); 380 381 #ifdef FILEASSOC 382 fileassoc_init(); 383 #endif /* FILEASSOC */ 384 385 #if NVERIEXEC > 0 386 /* 387 * Initialise the fingerprint operations vectors before 388 * fingerprints can be loaded. 389 */ 390 veriexec_init_fp_ops(); 391 #endif /* NVERIEXEC > 0 */ 392 393 #if defined(PAX_MPROTECT) 394 pax_init(); 395 #endif /* PAX_MPROTECT */ 396 397 /* Attach pseudo-devices. */ 398 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 399 (*pdev->pdev_attach)(pdev->pdev_count); 400 401 #ifdef FAST_IPSEC 402 /* Attach network crypto subsystem */ 403 ipsec_attach(); 404 #endif 405 406 /* 407 * Initialize protocols. Block reception of incoming packets 408 * until everything is ready. 409 */ 410 s = splnet(); 411 ifinit(); 412 domaininit(); 413 if_attachdomain(); 414 splx(s); 415 416 #ifdef GPROF 417 /* Initialize kernel profiling. */ 418 kmstartup(); 419 #endif 420 421 /* Initialize system accouting. */ 422 acct_init(); 423 424 /* Kick off timeout driven events by calling first time. */ 425 schedcpu(NULL); 426 427 /* 428 * Create process 1 (init(8)). We do this now, as Unix has 429 * historically had init be process 1, and changing this would 430 * probably upset a lot of people. 431 * 432 * Note that process 1 won't immediately exec init(8), but will 433 * wait for us to inform it that the root file system has been 434 * mounted. 435 */ 436 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 437 panic("fork init"); 438 439 /* 440 * Create any kernel threads who's creation was deferred because 441 * initproc had not yet been created. 442 */ 443 kthread_run_deferred_queue(); 444 445 /* 446 * Now that device driver threads have been created, wait for 447 * them to finish any deferred autoconfiguration. Note we don't 448 * need to lock this semaphore, since we haven't booted any 449 * secondary processors, yet. 450 */ 451 while (config_pending) 452 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 453 454 /* 455 * Finalize configuration now that all real devices have been 456 * found. This needs to be done before the root device is 457 * selected, since finalization may create the root device. 458 */ 459 config_finalize(); 460 461 /* 462 * Now that autoconfiguration has completed, we can determine 463 * the root and dump devices. 464 */ 465 cpu_rootconf(); 466 cpu_dumpconf(); 467 468 /* Mount the root file system. */ 469 do { 470 domountroothook(); 471 if ((error = vfs_mountroot())) { 472 printf("cannot mount root, error = %d\n", error); 473 boothowto |= RB_ASKNAME; 474 setroot(root_device, 475 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 476 } 477 } while (error != 0); 478 mountroothook_destroy(); 479 480 /* 481 * Initialise the time-of-day clock, passing the time recorded 482 * in the root filesystem (if any) for use by systems that 483 * don't have a non-volatile time-of-day device. 484 */ 485 inittodr(rootfstime); 486 487 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 488 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 489 490 /* 491 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 492 * reference it. 493 */ 494 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 495 if (error) 496 panic("cannot find root vnode, error=%d", error); 497 cwdi0.cwdi_cdir = rootvnode; 498 VREF(cwdi0.cwdi_cdir); 499 VOP_UNLOCK(rootvnode, 0); 500 cwdi0.cwdi_rdir = NULL; 501 502 /* 503 * Now that root is mounted, we can fixup initproc's CWD 504 * info. All other processes are kthreads, which merely 505 * share proc0's CWD info. 506 */ 507 initproc->p_cwdi->cwdi_cdir = rootvnode; 508 VREF(initproc->p_cwdi->cwdi_cdir); 509 initproc->p_cwdi->cwdi_rdir = NULL; 510 511 /* 512 * Now can look at time, having had a chance to verify the time 513 * from the file system. Reset p->p_rtime as it may have been 514 * munched in mi_switch() after the time got set. 515 */ 516 proclist_lock_read(); 517 s = splsched(); 518 #ifdef __HAVE_TIMECOUNTER 519 getmicrotime(&time); 520 #else 521 mono_time = time; 522 #endif 523 boottime = time; 524 LIST_FOREACH(p, &allproc, p_list) { 525 KASSERT((p->p_flag & P_MARKER) == 0); 526 p->p_stats->p_start = time; 527 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 528 if (l->l_cpu != NULL) 529 l->l_cpu->ci_schedstate.spc_runtime = time; 530 } 531 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 532 } 533 splx(s); 534 proclist_unlock_read(); 535 536 /* Create the pageout daemon kernel thread. */ 537 uvm_swap_init(); 538 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 539 panic("fork pagedaemon"); 540 541 /* Create the filesystem syncer kernel thread. */ 542 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 543 panic("fork syncer"); 544 545 /* Create the aiodone daemon kernel thread. */ 546 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 547 "aiodoned")) 548 panic("fork aiodoned"); 549 550 #if defined(MULTIPROCESSOR) 551 /* Boot the secondary processors. */ 552 cpu_boot_secondary_processors(); 553 #endif 554 555 /* Initialize exec structures */ 556 exec_init(1); 557 558 /* 559 * Okay, now we can let init(8) exec! It's off to userland! 560 */ 561 start_init_exec = 1; 562 wakeup(&start_init_exec); 563 564 /* The scheduler is an infinite loop. */ 565 uvm_scheduler(); 566 /* NOTREACHED */ 567 } 568 569 void 570 setrootfstime(time_t t) 571 { 572 rootfstime = t; 573 } 574 575 static void 576 check_console(struct lwp *l) 577 { 578 struct nameidata nd; 579 int error; 580 581 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 582 error = namei(&nd); 583 if (error == 0) 584 vrele(nd.ni_vp); 585 else if (error == ENOENT) 586 printf("warning: no /dev/console\n"); 587 else 588 printf("warning: lookup /dev/console: error %d\n", error); 589 } 590 591 /* 592 * List of paths to try when searching for "init". 593 */ 594 static const char *initpaths[] = { 595 "/sbin/init", 596 "/sbin/oinit", 597 "/sbin/init.bak", 598 NULL, 599 }; 600 601 /* 602 * Start the initial user process; try exec'ing each pathname in "initpaths". 603 * The program is invoked with one argument containing the boot flags. 604 */ 605 static void 606 start_init(void *arg) 607 { 608 struct lwp *l = arg; 609 struct proc *p = l->l_proc; 610 vaddr_t addr; 611 struct sys_execve_args /* { 612 syscallarg(const char *) path; 613 syscallarg(char * const *) argp; 614 syscallarg(char * const *) envp; 615 } */ args; 616 int options, i, error; 617 register_t retval[2]; 618 char flags[4], *flagsp; 619 const char *path, *slash; 620 char *ucp, **uap, *arg0, *arg1 = NULL; 621 char ipath[129]; 622 int ipx, len; 623 624 /* 625 * Now in process 1. 626 */ 627 strncpy(p->p_comm, "init", MAXCOMLEN); 628 629 /* 630 * Wait for main() to tell us that it's safe to exec. 631 */ 632 while (start_init_exec == 0) 633 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 634 635 /* 636 * This is not the right way to do this. We really should 637 * hand-craft a descriptor onto /dev/console to hand to init, 638 * but that's a _lot_ more work, and the benefit from this easy 639 * hack makes up for the "good is the enemy of the best" effect. 640 */ 641 check_console(l); 642 643 /* 644 * Need just enough stack to hold the faked-up "execve()" arguments. 645 */ 646 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 647 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 648 NULL, UVM_UNKNOWN_OFFSET, 0, 649 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 650 UVM_ADV_NORMAL, 651 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 652 panic("init: couldn't allocate argument space"); 653 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 654 655 ipx = 0; 656 while (1) { 657 if (boothowto & RB_ASKNAME) { 658 printf("init path"); 659 if (initpaths[ipx]) 660 printf(" (default %s)", initpaths[ipx]); 661 printf(": "); 662 len = cngetsn(ipath, sizeof(ipath)-1); 663 if (len == 0) { 664 if (initpaths[ipx]) 665 path = initpaths[ipx++]; 666 else 667 continue; 668 } else { 669 ipath[len] = '\0'; 670 path = ipath; 671 } 672 } else { 673 if ((path = initpaths[ipx++]) == NULL) 674 break; 675 } 676 677 ucp = (char *)USRSTACK; 678 679 /* 680 * Construct the boot flag argument. 681 */ 682 flagsp = flags; 683 *flagsp++ = '-'; 684 options = 0; 685 686 if (boothowto & RB_SINGLE) { 687 *flagsp++ = 's'; 688 options = 1; 689 } 690 #ifdef notyet 691 if (boothowto & RB_FASTBOOT) { 692 *flagsp++ = 'f'; 693 options = 1; 694 } 695 #endif 696 697 /* 698 * Move out the flags (arg 1), if necessary. 699 */ 700 if (options != 0) { 701 *flagsp++ = '\0'; 702 i = flagsp - flags; 703 #ifdef DEBUG 704 printf("init: copying out flags `%s' %d\n", flags, i); 705 #endif 706 arg1 = STACK_ALLOC(ucp, i); 707 ucp = STACK_MAX(arg1, i); 708 (void)copyout((caddr_t)flags, arg1, i); 709 } 710 711 /* 712 * Move out the file name (also arg 0). 713 */ 714 i = strlen(path) + 1; 715 #ifdef DEBUG 716 printf("init: copying out path `%s' %d\n", path, i); 717 #else 718 if (boothowto & RB_ASKNAME || path != initpaths[0]) 719 printf("init: trying %s\n", path); 720 #endif 721 arg0 = STACK_ALLOC(ucp, i); 722 ucp = STACK_MAX(arg0, i); 723 (void)copyout(path, arg0, i); 724 725 /* 726 * Move out the arg pointers. 727 */ 728 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 729 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 730 SCARG(&args, path) = arg0; 731 SCARG(&args, argp) = uap; 732 SCARG(&args, envp) = NULL; 733 slash = strrchr(path, '/'); 734 if (slash) 735 (void)suword((caddr_t)uap++, 736 (long)arg0 + (slash + 1 - path)); 737 else 738 (void)suword((caddr_t)uap++, (long)arg0); 739 if (options != 0) 740 (void)suword((caddr_t)uap++, (long)arg1); 741 (void)suword((caddr_t)uap++, 0); /* terminator */ 742 743 /* 744 * Now try to exec the program. If can't for any reason 745 * other than it doesn't exist, complain. 746 */ 747 error = sys_execve(l, &args, retval); 748 if (error == 0 || error == EJUSTRETURN) { 749 KERNEL_PROC_UNLOCK(l); 750 return; 751 } 752 printf("exec %s: error %d\n", path, error); 753 } 754 printf("init: not found\n"); 755 panic("no init"); 756 } 757
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