init_main.c revision 1.291
1 /* $NetBSD: init_main.c,v 1.291 2007/01/27 22:54:58 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 1.291 2007/01/27 22:54:58 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_pax.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/fstrans.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 #include <sys/iostat.h> 120 #ifdef FAST_IPSEC 121 #include <netipsec/ipsec.h> 122 #endif 123 #ifdef SYSVSHM 124 #include <sys/shm.h> 125 #endif 126 #ifdef SYSVSEM 127 #include <sys/sem.h> 128 #endif 129 #ifdef SYSVMSG 130 #include <sys/msg.h> 131 #endif 132 #ifdef P1003_1B_SEMAPHORE 133 #include <sys/ksem.h> 134 #endif 135 #include <sys/domain.h> 136 #include <sys/namei.h> 137 #if NRND > 0 138 #include <sys/rnd.h> 139 #endif 140 #ifndef PIPE_SOCKETPAIR 141 #include <sys/pipe.h> 142 #endif 143 #ifdef LKM 144 #include <sys/lkm.h> 145 #endif 146 #if NVERIEXEC > 0 147 #include <sys/verified_exec.h> 148 #endif /* NVERIEXEC > 0 */ 149 #include <sys/kauth.h> 150 #include <net80211/ieee80211_netbsd.h> 151 152 #include <sys/syscall.h> 153 #include <sys/sa.h> 154 #include <sys/syscallargs.h> 155 156 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 157 #include <sys/pax.h> 158 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 159 #include <ufs/ufs/quota.h> 160 161 #include <miscfs/genfs/genfs.h> 162 #include <miscfs/syncfs/syncfs.h> 163 164 #include <machine/cpu.h> 165 166 #include <uvm/uvm.h> 167 168 #include <dev/cons.h> 169 170 #include <net/if.h> 171 #include <net/raw_cb.h> 172 173 #include <secmodel/secmodel.h> 174 175 extern struct proc proc0; 176 extern struct lwp lwp0; 177 extern struct cwdinfo cwdi0; 178 179 #ifndef curlwp 180 struct lwp *curlwp = &lwp0; 181 #endif 182 struct proc *initproc; 183 184 struct vnode *rootvp, *swapdev_vp; 185 int boothowto; 186 int cold = 1; /* still working on startup */ 187 struct timeval boottime; /* time at system startup - will only follow settime deltas */ 188 time_t rootfstime; /* recorded root fs time, if known */ 189 190 volatile int start_init_exec; /* semaphore for start_init() */ 191 192 static void check_console(struct lwp *l); 193 static void start_init(void *); 194 void main(void); 195 196 #if defined(__SSP__) || defined(__SSP_ALL__) 197 long __stack_chk_guard[8] = {0, 0, 0, 0, 0, 0, 0, 0}; 198 void __stack_chk_fail(void); 199 200 void 201 __stack_chk_fail(void) 202 { 203 panic("stack overflow detected; terminated"); 204 } 205 #endif 206 207 void __secmodel_none(void); 208 __weak_alias(secmodel_start, __secmodel_none); 209 void 210 __secmodel_none(void) 211 { 212 return; 213 } 214 215 /* 216 * System startup; initialize the world, create process 0, mount root 217 * filesystem, and fork to create init and pagedaemon. Most of the 218 * hard work is done in the lower-level initialization routines including 219 * startup(), which does memory initialization and autoconfiguration. 220 */ 221 void 222 main(void) 223 { 224 #ifdef __HAVE_TIMECOUNTER 225 struct timeval time; 226 #endif 227 struct lwp *l; 228 struct proc *p; 229 struct pdevinit *pdev; 230 int s, error; 231 extern struct pdevinit pdevinit[]; 232 extern void schedcpu(void *); 233 #ifdef NVNODE_IMPLICIT 234 int usevnodes; 235 #endif 236 237 /* 238 * Initialize the current LWP pointer (curlwp) before 239 * any possible traps/probes to simplify trap processing. 240 */ 241 l = &lwp0; 242 curlwp = l; 243 l->l_cpu = curcpu(); 244 l->l_proc = &proc0; 245 l->l_lid = 1; 246 247 /* 248 * Attempt to find console and initialize 249 * in case of early panic or other messages. 250 */ 251 consinit(); 252 253 KERNEL_LOCK_INIT(); 254 255 uvm_init(); 256 257 kmem_init(); 258 259 /* Do machine-dependent initialization. */ 260 cpu_startup(); 261 262 /* Initialize callouts. */ 263 callout_startup(); 264 265 /* 266 * Initialize the kernel authorization subsystem and start the 267 * default security model, if any. We need to do this early 268 * enough so that subsystems relying on any of the aforementioned 269 * can work properly. Since the security model may dictate the 270 * credential inheritance policy, it is needed at least before 271 * any process is created, specifically proc0. 272 */ 273 kauth_init(); 274 secmodel_start(); 275 276 /* Initialize the buffer cache */ 277 bufinit(); 278 279 /* 280 * Initialize mbuf's. Do this now because we might attempt to 281 * allocate mbufs or mbuf clusters during autoconfiguration. 282 */ 283 mbinit(); 284 285 /* Initialize sockets. */ 286 soinit(); 287 288 #ifdef KCONT 289 /* Initialize kcont. */ 290 kcont_init(); 291 #endif 292 293 /* 294 * The following things must be done before autoconfiguration. 295 */ 296 evcnt_init(); /* initialize event counters */ 297 #if NRND > 0 298 rnd_init(); /* initialize RNG */ 299 #endif 300 /* Initialize the sysctl subsystem. */ 301 sysctl_init(); 302 303 /* Initialize process and pgrp structures. */ 304 procinit(); 305 lwpinit(); 306 307 /* Initialize signal-related data structures. */ 308 signal_init(); 309 310 /* Create process 0 (the swapper). */ 311 proc0_init(); 312 313 /* 314 * Charge root for one process. 315 */ 316 (void)chgproccnt(0, 1); 317 318 rqinit(); 319 320 /* Initialize I/O statistics. */ 321 iostat_init(); 322 323 /* Initialize the file systems. */ 324 #ifdef NVNODE_IMPLICIT 325 /* 326 * If maximum number of vnodes in namei vnode cache is not explicitly 327 * defined in kernel config, adjust the number such as we use roughly 328 * 1.0% of memory for vnode cache (but not less than NVNODE vnodes). 329 */ 330 usevnodes = (ptoa((unsigned)physmem) / 100) / sizeof(struct vnode); 331 if (usevnodes > desiredvnodes) 332 desiredvnodes = usevnodes; 333 #endif 334 vfsinit(); 335 336 /* Initialize fstrans. */ 337 fstrans_init(); 338 339 #ifdef __HAVE_TIMECOUNTER 340 inittimecounter(); 341 ntp_init(); 342 #endif /* __HAVE_TIMECOUNTER */ 343 344 /* Configure the system hardware. This will enable interrupts. */ 345 configure(); 346 347 #if defined(__SSP__) || defined(__SSP_ALL__) 348 { 349 #ifdef DIAGNOSTIC 350 printf("Initializing SSP:"); 351 #endif 352 /* 353 * We initialize ssp here carefully: 354 * 1. after we got some entropy 355 * 2. without calling a function 356 */ 357 size_t i; 358 long guard[__arraycount(__stack_chk_guard)]; 359 360 arc4randbytes(guard, sizeof(guard)); 361 for (i = 0; i < __arraycount(guard); i++) 362 __stack_chk_guard[i] = guard[i]; 363 #ifdef DIAGNOSTIC 364 for (i = 0; i < __arraycount(guard); i++) 365 printf("%lx ", guard[i]); 366 printf("\n"); 367 #endif 368 } 369 #endif 370 ubc_init(); /* must be after autoconfig */ 371 372 /* Lock the kernel on behalf of proc0. */ 373 KERNEL_PROC_LOCK(l); 374 375 #ifdef SYSVSHM 376 /* Initialize System V style shared memory. */ 377 shminit(); 378 #endif 379 380 #ifdef SYSVSEM 381 /* Initialize System V style semaphores. */ 382 seminit(); 383 #endif 384 385 #ifdef SYSVMSG 386 /* Initialize System V style message queues. */ 387 msginit(); 388 #endif 389 390 #ifdef P1003_1B_SEMAPHORE 391 /* Initialize posix semaphores */ 392 ksem_init(); 393 #endif 394 395 #if NVERIEXEC > 0 396 /* 397 * Initialise the Veriexec subsystem. 398 */ 399 veriexec_init(); 400 #endif /* NVERIEXEC > 0 */ 401 402 #if defined(PAX_MPROTECT) || defined(PAX_SEGVGUARD) 403 pax_init(); 404 #endif /* PAX_MPROTECT || PAX_SEGVGUARD */ 405 406 /* Attach pseudo-devices. */ 407 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 408 (*pdev->pdev_attach)(pdev->pdev_count); 409 410 #ifdef FAST_IPSEC 411 /* Attach network crypto subsystem */ 412 ipsec_attach(); 413 #endif 414 415 /* 416 * Initialize protocols. Block reception of incoming packets 417 * until everything is ready. 418 */ 419 s = splnet(); 420 ifinit(); 421 domaininit(); 422 if_attachdomain(); 423 splx(s); 424 425 #ifdef GPROF 426 /* Initialize kernel profiling. */ 427 kmstartup(); 428 #endif 429 430 /* Initialize system accouting. */ 431 acct_init(); 432 433 /* Kick off timeout driven events by calling first time. */ 434 schedcpu(NULL); 435 436 /* 437 * Create process 1 (init(8)). We do this now, as Unix has 438 * historically had init be process 1, and changing this would 439 * probably upset a lot of people. 440 * 441 * Note that process 1 won't immediately exec init(8), but will 442 * wait for us to inform it that the root file system has been 443 * mounted. 444 */ 445 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 446 panic("fork init"); 447 448 /* 449 * Create any kernel threads who's creation was deferred because 450 * initproc had not yet been created. 451 */ 452 kthread_run_deferred_queue(); 453 454 /* 455 * Now that device driver threads have been created, wait for 456 * them to finish any deferred autoconfiguration. Note we don't 457 * need to lock this semaphore, since we haven't booted any 458 * secondary processors, yet. 459 */ 460 while (config_pending) 461 (void) tsleep(&config_pending, PWAIT, "cfpend", 0); 462 463 /* 464 * Finalize configuration now that all real devices have been 465 * found. This needs to be done before the root device is 466 * selected, since finalization may create the root device. 467 */ 468 config_finalize(); 469 470 /* 471 * Now that autoconfiguration has completed, we can determine 472 * the root and dump devices. 473 */ 474 cpu_rootconf(); 475 cpu_dumpconf(); 476 477 /* Mount the root file system. */ 478 do { 479 domountroothook(); 480 if ((error = vfs_mountroot())) { 481 printf("cannot mount root, error = %d\n", error); 482 boothowto |= RB_ASKNAME; 483 setroot(root_device, 484 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 485 } 486 } while (error != 0); 487 mountroothook_destroy(); 488 489 /* 490 * Initialise the time-of-day clock, passing the time recorded 491 * in the root filesystem (if any) for use by systems that 492 * don't have a non-volatile time-of-day device. 493 */ 494 inittodr(rootfstime); 495 496 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 497 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 498 499 /* 500 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 501 * reference it. 502 */ 503 error = VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode); 504 if (error) 505 panic("cannot find root vnode, error=%d", error); 506 cwdi0.cwdi_cdir = rootvnode; 507 VREF(cwdi0.cwdi_cdir); 508 VOP_UNLOCK(rootvnode, 0); 509 cwdi0.cwdi_rdir = NULL; 510 511 /* 512 * Now that root is mounted, we can fixup initproc's CWD 513 * info. All other processes are kthreads, which merely 514 * share proc0's CWD info. 515 */ 516 initproc->p_cwdi->cwdi_cdir = rootvnode; 517 VREF(initproc->p_cwdi->cwdi_cdir); 518 initproc->p_cwdi->cwdi_rdir = NULL; 519 520 /* 521 * Now can look at time, having had a chance to verify the time 522 * from the file system. Reset p->p_rtime as it may have been 523 * munched in mi_switch() after the time got set. 524 */ 525 proclist_lock_read(); 526 s = splsched(); 527 #ifdef __HAVE_TIMECOUNTER 528 getmicrotime(&time); 529 #else 530 mono_time = time; 531 #endif 532 boottime = time; 533 LIST_FOREACH(p, &allproc, p_list) { 534 KASSERT((p->p_flag & P_MARKER) == 0); 535 p->p_stats->p_start = time; 536 LIST_FOREACH(l, &p->p_lwps, l_sibling) { 537 if (l->l_cpu != NULL) 538 l->l_cpu->ci_schedstate.spc_runtime = time; 539 } 540 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 541 } 542 splx(s); 543 proclist_unlock_read(); 544 545 /* Create the pageout daemon kernel thread. */ 546 uvm_swap_init(); 547 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 548 panic("fork pagedaemon"); 549 550 /* Create the filesystem syncer kernel thread. */ 551 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 552 panic("fork syncer"); 553 554 /* Create the aiodone daemon kernel thread. */ 555 if (workqueue_create(&uvm.aiodone_queue, "aiodoned", 556 uvm_aiodone_worker, NULL, PVM, IPL_BIO, 0)) 557 panic("fork aiodoned"); 558 559 #if defined(MULTIPROCESSOR) 560 /* Boot the secondary processors. */ 561 cpu_boot_secondary_processors(); 562 #endif 563 564 /* Initialize exec structures */ 565 exec_init(1); 566 567 /* 568 * Okay, now we can let init(8) exec! It's off to userland! 569 */ 570 start_init_exec = 1; 571 wakeup(&start_init_exec); 572 573 /* The scheduler is an infinite loop. */ 574 uvm_scheduler(); 575 /* NOTREACHED */ 576 } 577 578 void 579 setrootfstime(time_t t) 580 { 581 rootfstime = t; 582 } 583 584 static void 585 check_console(struct lwp *l) 586 { 587 struct nameidata nd; 588 int error; 589 590 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", l); 591 error = namei(&nd); 592 if (error == 0) 593 vrele(nd.ni_vp); 594 else if (error == ENOENT) 595 printf("warning: no /dev/console\n"); 596 else 597 printf("warning: lookup /dev/console: error %d\n", error); 598 } 599 600 /* 601 * List of paths to try when searching for "init". 602 */ 603 static const char *initpaths[] = { 604 "/sbin/init", 605 "/sbin/oinit", 606 "/sbin/init.bak", 607 NULL, 608 }; 609 610 /* 611 * Start the initial user process; try exec'ing each pathname in "initpaths". 612 * The program is invoked with one argument containing the boot flags. 613 */ 614 static void 615 start_init(void *arg) 616 { 617 struct lwp *l = arg; 618 struct proc *p = l->l_proc; 619 vaddr_t addr; 620 struct sys_execve_args /* { 621 syscallarg(const char *) path; 622 syscallarg(char * const *) argp; 623 syscallarg(char * const *) envp; 624 } */ args; 625 int options, i, error; 626 register_t retval[2]; 627 char flags[4], *flagsp; 628 const char *path, *slash; 629 char *ucp, **uap, *arg0, *arg1 = NULL; 630 char ipath[129]; 631 int ipx, len; 632 633 /* 634 * Now in process 1. 635 */ 636 strncpy(p->p_comm, "init", MAXCOMLEN); 637 638 /* 639 * Wait for main() to tell us that it's safe to exec. 640 */ 641 while (start_init_exec == 0) 642 (void) tsleep(&start_init_exec, PWAIT, "initexec", 0); 643 644 /* 645 * This is not the right way to do this. We really should 646 * hand-craft a descriptor onto /dev/console to hand to init, 647 * but that's a _lot_ more work, and the benefit from this easy 648 * hack makes up for the "good is the enemy of the best" effect. 649 */ 650 check_console(l); 651 652 /* 653 * Need just enough stack to hold the faked-up "execve()" arguments. 654 */ 655 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 656 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 657 NULL, UVM_UNKNOWN_OFFSET, 0, 658 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 659 UVM_ADV_NORMAL, 660 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 661 panic("init: couldn't allocate argument space"); 662 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 663 664 ipx = 0; 665 while (1) { 666 if (boothowto & RB_ASKNAME) { 667 printf("init path"); 668 if (initpaths[ipx]) 669 printf(" (default %s)", initpaths[ipx]); 670 printf(": "); 671 len = cngetsn(ipath, sizeof(ipath)-1); 672 if (len == 0) { 673 if (initpaths[ipx]) 674 path = initpaths[ipx++]; 675 else 676 continue; 677 } else { 678 ipath[len] = '\0'; 679 path = ipath; 680 } 681 } else { 682 if ((path = initpaths[ipx++]) == NULL) 683 break; 684 } 685 686 ucp = (char *)USRSTACK; 687 688 /* 689 * Construct the boot flag argument. 690 */ 691 flagsp = flags; 692 *flagsp++ = '-'; 693 options = 0; 694 695 if (boothowto & RB_SINGLE) { 696 *flagsp++ = 's'; 697 options = 1; 698 } 699 #ifdef notyet 700 if (boothowto & RB_FASTBOOT) { 701 *flagsp++ = 'f'; 702 options = 1; 703 } 704 #endif 705 706 /* 707 * Move out the flags (arg 1), if necessary. 708 */ 709 if (options != 0) { 710 *flagsp++ = '\0'; 711 i = flagsp - flags; 712 #ifdef DEBUG 713 printf("init: copying out flags `%s' %d\n", flags, i); 714 #endif 715 arg1 = STACK_ALLOC(ucp, i); 716 ucp = STACK_MAX(arg1, i); 717 (void)copyout((caddr_t)flags, arg1, i); 718 } 719 720 /* 721 * Move out the file name (also arg 0). 722 */ 723 i = strlen(path) + 1; 724 #ifdef DEBUG 725 printf("init: copying out path `%s' %d\n", path, i); 726 #else 727 if (boothowto & RB_ASKNAME || path != initpaths[0]) 728 printf("init: trying %s\n", path); 729 #endif 730 arg0 = STACK_ALLOC(ucp, i); 731 ucp = STACK_MAX(arg0, i); 732 (void)copyout(path, arg0, i); 733 734 /* 735 * Move out the arg pointers. 736 */ 737 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 738 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 739 SCARG(&args, path) = arg0; 740 SCARG(&args, argp) = uap; 741 SCARG(&args, envp) = NULL; 742 slash = strrchr(path, '/'); 743 if (slash) 744 (void)suword((caddr_t)uap++, 745 (long)arg0 + (slash + 1 - path)); 746 else 747 (void)suword((caddr_t)uap++, (long)arg0); 748 if (options != 0) 749 (void)suword((caddr_t)uap++, (long)arg1); 750 (void)suword((caddr_t)uap++, 0); /* terminator */ 751 752 /* 753 * Now try to exec the program. If can't for any reason 754 * other than it doesn't exist, complain. 755 */ 756 error = sys_execve(l, &args, retval); 757 if (error == 0 || error == EJUSTRETURN) { 758 KERNEL_PROC_UNLOCK(l); 759 return; 760 } 761 printf("exec %s: error %d\n", path, error); 762 } 763 printf("init: not found\n"); 764 panic("no init"); 765 } 766
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