1 /* $NetBSD: init_main.c,v 1.217 2003/01/20 20:02:56 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Christopher G. Demetriou. All rights reserved. 5 * Copyright (c) 1982, 1986, 1989, 1991, 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * (c) UNIX System Laboratories, Inc. 8 * All or some portions of this file are derived from material licensed 9 * to the University of California by American Telephone and Telegraph 10 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 11 * the permission of UNIX System Laboratories, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. All advertising materials mentioning features or use of this software 22 * must display the following acknowledgement: 23 * This product includes software developed by the University of 24 * California, Berkeley and its contributors. 25 * 4. Neither the name of the University nor the names of its contributors 26 * may be used to endorse or promote products derived from this software 27 * without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 30 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 31 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 32 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 33 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 34 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 35 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 37 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 38 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 39 * SUCH DAMAGE. 40 * 41 * @(#)init_main.c 8.16 (Berkeley) 5/14/95 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: init_main.c,v 1.217 2003/01/20 20:02:56 christos Exp $"); 46 47 #include "fs_nfs.h" 48 #include "opt_nfsserver.h" 49 #include "opt_sysv.h" 50 #include "opt_maxuprc.h" 51 #include "opt_multiprocessor.h" 52 #include "opt_pipe.h" 53 #include "opt_syscall_debug.h" 54 #include "opt_systrace.h" 55 #include "opt_posix.h" 56 57 #include "rnd.h" 58 59 #include <sys/param.h> 60 #include <sys/acct.h> 61 #include <sys/filedesc.h> 62 #include <sys/file.h> 63 #include <sys/errno.h> 64 #include <sys/callout.h> 65 #include <sys/kernel.h> 66 #include <sys/mount.h> 67 #include <sys/proc.h> 68 #include <sys/kthread.h> 69 #include <sys/resourcevar.h> 70 #include <sys/signalvar.h> 71 #include <sys/systm.h> 72 #include <sys/vnode.h> 73 #include <sys/tty.h> 74 #include <sys/conf.h> 75 #include <sys/disklabel.h> 76 #include <sys/buf.h> 77 #include <sys/device.h> 78 #include <sys/disk.h> 79 #include <sys/exec.h> 80 #include <sys/socketvar.h> 81 #include <sys/protosw.h> 82 #include <sys/reboot.h> 83 #include <sys/user.h> 84 #include <sys/sysctl.h> 85 #include <sys/event.h> 86 #ifdef SYSVSHM 87 #include <sys/shm.h> 88 #endif 89 #ifdef SYSVSEM 90 #include <sys/sem.h> 91 #endif 92 #ifdef SYSVMSG 93 #include <sys/msg.h> 94 #endif 95 #ifdef P1003_1B_SEMAPHORE 96 #include <sys/ksem.h> 97 #endif 98 #ifdef SYSTRACE 99 #include <sys/systrace.h> 100 #endif 101 #include <sys/domain.h> 102 #include <sys/mbuf.h> 103 #include <sys/namei.h> 104 #if NRND > 0 105 #include <sys/rnd.h> 106 #endif 107 #ifndef PIPE_SOCKETPAIR 108 #include <sys/pipe.h> 109 #endif 110 #ifdef LKM 111 #include <sys/lkm.h> 112 #endif 113 114 #include <sys/syscall.h> 115 #include <sys/sa.h> 116 #include <sys/syscallargs.h> 117 118 #include <ufs/ufs/quota.h> 119 120 #include <miscfs/genfs/genfs.h> 121 #include <miscfs/syncfs/syncfs.h> 122 123 #include <machine/cpu.h> 124 125 #include <uvm/uvm.h> 126 127 #include <dev/cons.h> 128 129 #include <net/if.h> 130 #include <net/raw_cb.h> 131 132 const char copyright[] = 133 "Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003\n" 134 " The NetBSD Foundation, Inc. All rights reserved.\n" 135 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 136 " The Regents of the University of California. All rights reserved.\n" 137 "\n"; 138 139 /* Components of the first process -- never freed. */ 140 struct session session0; 141 struct pgrp pgrp0; 142 struct proc proc0; 143 struct lwp lwp0; 144 struct pcred cred0; 145 struct filedesc0 filedesc0; 146 struct cwdinfo cwdi0; 147 struct plimit limit0; 148 struct pstats pstat0; 149 struct vmspace vmspace0; 150 struct sigacts sigacts0; 151 #ifndef curlwp 152 struct lwp *curlwp = &lwp0; 153 #endif 154 struct proc *initproc; 155 156 int nofile = NOFILE; 157 int maxuprc = MAXUPRC; 158 int cmask = CMASK; 159 extern struct user *proc0paddr; 160 161 struct vnode *rootvp, *swapdev_vp; 162 int boothowto; 163 int cold = 1; /* still working on startup */ 164 struct timeval boottime; 165 166 __volatile int start_init_exec; /* semaphore for start_init() */ 167 168 static void check_console(struct proc *p); 169 static void start_init(void *); 170 void main(void); 171 172 extern const struct emul emul_netbsd; /* defined in kern_exec.c */ 173 174 /* 175 * System startup; initialize the world, create process 0, mount root 176 * filesystem, and fork to create init and pagedaemon. Most of the 177 * hard work is done in the lower-level initialization routines including 178 * startup(), which does memory initialization and autoconfiguration. 179 */ 180 void 181 main(void) 182 { 183 struct lwp *l; 184 struct proc *p; 185 struct pdevinit *pdev; 186 int s, error; 187 u_int i; 188 rlim_t lim; 189 extern struct pdevinit pdevinit[]; 190 extern void schedcpu(void *); 191 #if defined(NFSSERVER) || defined(NFS) 192 extern void nfs_init(void); 193 #endif 194 #ifdef NVNODE_IMPLICIT 195 int usevnodes; 196 #endif 197 198 /* 199 * Initialize the current LWP pointer (curlwp) before 200 * any possible traps/probes to simplify trap processing. 201 */ 202 simple_lock_init(&proc0.p_raslock); 203 l = &lwp0; 204 curlwp = l; 205 l->l_cpu = curcpu(); 206 l->l_proc = &proc0; 207 l->l_lid = 1; 208 /* 209 * Attempt to find console and initialize 210 * in case of early panic or other messages. 211 */ 212 consinit(); 213 printf("%s", copyright); 214 215 KERNEL_LOCK_INIT(); 216 217 uvm_init(); 218 219 /* Do machine-dependent initialization. */ 220 cpu_startup(); 221 222 /* Initialize callouts. */ 223 callout_startup(); 224 225 /* 226 * Initialize mbuf's. Do this now because we might attempt to 227 * allocate mbufs or mbuf clusters during autoconfiguration. 228 */ 229 mbinit(); 230 231 /* Initialize kqueues. */ 232 kqueue_init(); 233 234 /* Initialize sockets. */ 235 soinit(); 236 237 /* 238 * The following things must be done before autoconfiguration. 239 */ 240 evcnt_init(); /* initialize event counters */ 241 disk_init(); /* initialize disk list */ 242 tty_init(); /* initialize tty list */ 243 #if NRND > 0 244 rnd_init(); /* initialize RNG */ 245 #endif 246 247 /* Initialize the sysctl subsystem. */ 248 sysctl_init(); 249 250 /* 251 * Initialize process and pgrp structures. 252 */ 253 procinit(); 254 255 #ifdef LKM 256 /* Initialize the LKM system. */ 257 lkm_init(); 258 #endif 259 260 /* 261 * Create process 0 (the swapper). 262 */ 263 p = &proc0; 264 LIST_INIT(&p->p_lwps); 265 LIST_INSERT_HEAD(&p->p_lwps, l, l_sibling); 266 p->p_nlwps = 1; 267 268 s = proclist_lock_write(); 269 LIST_INSERT_HEAD(&allproc, p, p_list); 270 LIST_INSERT_HEAD(PIDHASH(p->p_pid), p, p_hash); 271 LIST_INSERT_HEAD(&alllwp, l, l_list); 272 proclist_unlock_write(s); 273 274 p->p_pgrp = &pgrp0; 275 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 276 LIST_INIT(&pgrp0.pg_members); 277 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 278 279 pgrp0.pg_session = &session0; 280 session0.s_count = 1; 281 session0.s_sid = p->p_pid; 282 session0.s_leader = p; 283 284 /* 285 * Set P_NOCLDWAIT so that kernel threads are reparented to 286 * init(8) when they exit. init(8) can easily wait them out 287 * for us. 288 */ 289 p->p_flag = P_SYSTEM | P_NOCLDWAIT; 290 p->p_stat = SACTIVE; 291 p->p_nice = NZERO; 292 p->p_emul = &emul_netbsd; 293 #ifdef __HAVE_SYSCALL_INTERN 294 (*p->p_emul->e_syscall_intern)(p); 295 #endif 296 strncpy(p->p_comm, "swapper", MAXCOMLEN); 297 298 l->l_flag = L_INMEM; 299 l->l_stat = LSONPROC; 300 p->p_nrlwps = 1; 301 302 callout_init(&l->l_tsleep_ch); 303 304 /* Create credentials. */ 305 cred0.p_refcnt = 1; 306 p->p_cred = &cred0; 307 p->p_ucred = crget(); 308 p->p_ucred->cr_ngroups = 1; /* group 0 */ 309 310 /* Create the file descriptor table. */ 311 finit(); 312 p->p_fd = &filedesc0.fd_fd; 313 fdinit1(&filedesc0); 314 315 /* Create the CWD info. */ 316 p->p_cwdi = &cwdi0; 317 cwdi0.cwdi_cmask = cmask; 318 cwdi0.cwdi_refcnt = 1; 319 320 /* Create the limits structures. */ 321 p->p_limit = &limit0; 322 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 323 limit0.pl_rlimit[i].rlim_cur = 324 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 325 326 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 327 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 328 maxfiles < nofile ? maxfiles : nofile; 329 330 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 331 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 332 maxproc < maxuprc ? maxproc : maxuprc; 333 334 lim = ptoa(uvmexp.free); 335 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 336 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 337 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 338 limit0.pl_corename = defcorename; 339 limit0.p_refcnt = 1; 340 341 /* 342 * Initialize proc0's vmspace, which uses the kernel pmap. 343 * All kernel processes (which never have user space mappings) 344 * share proc0's vmspace, and thus, the kernel pmap. 345 */ 346 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 347 trunc_page(VM_MAX_ADDRESS)); 348 p->p_vmspace = &vmspace0; 349 350 l->l_addr = proc0paddr; /* XXX */ 351 352 p->p_stats = &pstat0; 353 354 /* 355 * Charge root for one process. 356 */ 357 (void)chgproccnt(0, 1); 358 359 rqinit(); 360 361 /* Configure virtual memory system, set vm rlimits. */ 362 uvm_init_limits(p); 363 364 /* Initialize the file systems. */ 365 #if defined(NFSSERVER) || defined(NFS) 366 nfs_init(); /* initialize server/shared data */ 367 #endif 368 #ifdef NVNODE_IMPLICIT 369 /* 370 * If maximum number of vnodes in namei vnode cache is not explicitly 371 * defined in kernel config, adjust the number such as we use roughly 372 * 0.5% of memory for vnode cache (but not less than NVNODE vnodes). 373 */ 374 usevnodes = (ptoa((unsigned)physmem) / 200) / sizeof(struct vnode); 375 if (usevnodes > desiredvnodes) 376 desiredvnodes = usevnodes; 377 #endif 378 vfsinit(); 379 380 /* Configure the system hardware. This will enable interrupts. */ 381 configure(); 382 383 ubc_init(); /* must be after autoconfig */ 384 385 /* Lock the kernel on behalf of proc0. */ 386 KERNEL_PROC_LOCK(l); 387 388 #ifdef SYSVSHM 389 /* Initialize System V style shared memory. */ 390 shminit(); 391 #endif 392 393 #ifdef SYSVSEM 394 /* Initialize System V style semaphores. */ 395 seminit(); 396 #endif 397 398 #ifdef SYSVMSG 399 /* Initialize System V style message queues. */ 400 msginit(); 401 #endif 402 403 404 #ifdef P1003_1B_SEMAPHORE 405 /* Initialize posix semaphores */ 406 ksem_init(); 407 #endif 408 /* Attach pseudo-devices. */ 409 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 410 (*pdev->pdev_attach)(pdev->pdev_count); 411 412 /* 413 * Initialize protocols. Block reception of incoming packets 414 * until everything is ready. 415 */ 416 s = splnet(); 417 ifinit(); 418 domaininit(); 419 if_attachdomain(); 420 splx(s); 421 422 #ifdef GPROF 423 /* Initialize kernel profiling. */ 424 kmstartup(); 425 #endif 426 427 /* Initialize system accouting. */ 428 acct_init(); 429 430 #ifdef SYSTRACE 431 systrace_init(); 432 #endif 433 /* 434 * Initialize signal-related data structures, and signal state 435 * for proc0. 436 */ 437 signal_init(); 438 p->p_sigacts = &sigacts0; 439 siginit(p); 440 441 /* Kick off timeout driven events by calling first time. */ 442 schedcpu(NULL); 443 444 /* 445 * Create process 1 (init(8)). We do this now, as Unix has 446 * historically had init be process 1, and changing this would 447 * probably upset a lot of people. 448 * 449 * Note that process 1 won't immediately exec init(8), but will 450 * wait for us to inform it that the root file system has been 451 * mounted. 452 */ 453 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 454 panic("fork init"); 455 456 /* 457 * Create any kernel threads who's creation was deferred because 458 * initproc had not yet been created. 459 */ 460 kthread_run_deferred_queue(); 461 462 /* 463 * Now that device driver threads have been created, wait for 464 * them to finish any deferred autoconfiguration. Note we don't 465 * need to lock this semaphore, since we haven't booted any 466 * secondary processors, yet. 467 */ 468 while (config_pending) 469 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 470 471 /* 472 * Finalize configuration now that all real devices have been 473 * found. This needs to be done before the root device is 474 * selected, since finalization may create the root device. 475 */ 476 config_finalize(); 477 478 /* 479 * Now that autoconfiguration has completed, we can determine 480 * the root and dump devices. 481 */ 482 cpu_rootconf(); 483 cpu_dumpconf(); 484 485 /* Mount the root file system. */ 486 do { 487 domountroothook(); 488 if ((error = vfs_mountroot())) { 489 printf("cannot mount root, error = %d\n", error); 490 boothowto |= RB_ASKNAME; 491 setroot(root_device, 492 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 493 } 494 } while (error != 0); 495 mountroothook_destroy(); 496 497 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 498 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 499 500 /* 501 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 502 * reference it. 503 */ 504 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 505 panic("cannot find root vnode"); 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 for (p = LIST_FIRST(&allproc); p != NULL; 528 p = LIST_NEXT(p, p_list)) { 529 p->p_stats->p_start = mono_time = boottime = time; 530 for (l = LIST_FIRST(&p->p_lwps); l != NULL; 531 l = LIST_NEXT(l, l_sibling)) 532 if (l->l_cpu != NULL) 533 l->l_cpu->ci_schedstate.spc_runtime = time; 534 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 535 } 536 splx(s); 537 proclist_unlock_read(); 538 539 /* Create the pageout daemon kernel thread. */ 540 uvm_swap_init(); 541 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 542 panic("fork pagedaemon"); 543 544 /* Create the process reaper kernel thread. */ 545 if (kthread_create1(reaper, NULL, NULL, "reaper")) 546 panic("fork reaper"); 547 548 /* Create the filesystem syncer kernel thread. */ 549 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 550 panic("fork syncer"); 551 552 /* Create the aiodone daemon kernel thread. */ 553 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 554 "aiodoned")) 555 panic("fork aiodoned"); 556 557 #if defined(MULTIPROCESSOR) 558 /* Boot the secondary processors. */ 559 cpu_boot_secondary_processors(); 560 #endif 561 562 /* Initialize exec structures */ 563 exec_init(1); 564 565 #ifndef PIPE_SOCKETPAIR 566 /* Initialize pipe structures */ 567 pipe_init(); 568 #endif 569 570 /* 571 * Okay, now we can let init(8) exec! It's off to userland! 572 */ 573 start_init_exec = 1; 574 wakeup((void *)&start_init_exec); 575 576 /* The scheduler is an infinite loop. */ 577 uvm_scheduler(); 578 /* NOTREACHED */ 579 } 580 581 static void 582 check_console(struct proc *p) 583 { 584 struct nameidata nd; 585 int error; 586 587 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 588 error = namei(&nd); 589 if (error == 0) 590 vrele(nd.ni_vp); 591 else if (error == ENOENT) 592 printf("warning: no /dev/console\n"); 593 else 594 printf("warning: lookup /dev/console: error %d\n", error); 595 } 596 597 /* 598 * List of paths to try when searching for "init". 599 */ 600 static const char *initpaths[] = { 601 "/sbin/init", 602 "/sbin/oinit", 603 "/sbin/init.bak", 604 NULL, 605 }; 606 607 /* 608 * Start the initial user process; try exec'ing each pathname in "initpaths". 609 * The program is invoked with one argument containing the boot flags. 610 */ 611 static void 612 start_init(void *arg) 613 { 614 struct lwp *l = arg; 615 struct proc *p = l->l_proc; 616 vaddr_t addr; 617 struct sys_execve_args /* { 618 syscallarg(const char *) path; 619 syscallarg(char * const *) argp; 620 syscallarg(char * const *) envp; 621 } */ args; 622 int options, i, error; 623 register_t retval[2]; 624 char flags[4], *flagsp; 625 const char *path, *slash; 626 char *ucp, **uap, *arg0, *arg1 = NULL; 627 char ipath[129]; 628 int ipx, len; 629 630 /* 631 * Now in process 1. 632 */ 633 strncpy(p->p_comm, "init", MAXCOMLEN); 634 635 /* 636 * Wait for main() to tell us that it's safe to exec. 637 */ 638 while (start_init_exec == 0) 639 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 640 641 /* 642 * This is not the right way to do this. We really should 643 * hand-craft a descriptor onto /dev/console to hand to init, 644 * but that's a _lot_ more work, and the benefit from this easy 645 * hack makes up for the "good is the enemy of the best" effect. 646 */ 647 check_console(p); 648 649 /* 650 * Need just enough stack to hold the faked-up "execve()" arguments. 651 */ 652 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 653 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 654 NULL, UVM_UNKNOWN_OFFSET, 0, 655 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 656 UVM_ADV_NORMAL, 657 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 658 panic("init: couldn't allocate argument space"); 659 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 660 661 ipx = 0; 662 while (1) { 663 if (boothowto & RB_ASKNAME) { 664 printf("init path"); 665 if (initpaths[ipx]) 666 printf(" (default %s)", initpaths[ipx]); 667 printf(": "); 668 len = cngetsn(ipath, sizeof(ipath)-1); 669 if (len == 0) { 670 if (initpaths[ipx]) 671 path = initpaths[ipx++]; 672 else 673 continue; 674 } else { 675 ipath[len] = '\0'; 676 path = ipath; 677 } 678 } else { 679 if ((path = initpaths[ipx++]) == NULL) 680 break; 681 } 682 683 ucp = (char *)USRSTACK; 684 685 /* 686 * Construct the boot flag argument. 687 */ 688 flagsp = flags; 689 *flagsp++ = '-'; 690 options = 0; 691 692 if (boothowto & RB_SINGLE) { 693 *flagsp++ = 's'; 694 options = 1; 695 } 696 #ifdef notyet 697 if (boothowto & RB_FASTBOOT) { 698 *flagsp++ = 'f'; 699 options = 1; 700 } 701 #endif 702 703 /* 704 * Move out the flags (arg 1), if necessary. 705 */ 706 if (options != 0) { 707 *flagsp++ = '\0'; 708 i = flagsp - flags; 709 #ifdef DEBUG 710 printf("init: copying out flags `%s' %d\n", flags, i); 711 #endif 712 arg1 = STACK_ALLOC(ucp, i); 713 ucp = STACK_MAX(arg1, i); 714 (void)copyout((caddr_t)flags, arg1, i); 715 } 716 717 /* 718 * Move out the file name (also arg 0). 719 */ 720 i = strlen(path) + 1; 721 #ifdef DEBUG 722 printf("init: copying out path `%s' %d\n", path, i); 723 #else 724 if (boothowto & RB_ASKNAME || path != initpaths[0]) 725 printf("init: trying %s\n", path); 726 #endif 727 arg0 = STACK_ALLOC(ucp, i); 728 ucp = STACK_MAX(arg0, i); 729 (void)copyout((caddr_t)path, arg0, i); 730 731 /* 732 * Move out the arg pointers. 733 */ 734 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 735 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 736 SCARG(&args, path) = arg0; 737 SCARG(&args, argp) = uap; 738 SCARG(&args, envp) = NULL; 739 slash = strrchr(path, '/'); 740 if (slash) 741 (void)suword((caddr_t)uap++, 742 (long)arg0 + (slash + 1 - path)); 743 else 744 (void)suword((caddr_t)uap++, (long)arg0); 745 if (options != 0) 746 (void)suword((caddr_t)uap++, (long)arg1); 747 (void)suword((caddr_t)uap++, 0); /* terminator */ 748 749 /* 750 * Now try to exec the program. If can't for any reason 751 * other than it doesn't exist, complain. 752 */ 753 error = sys_execve(LIST_FIRST(&p->p_lwps), &args, retval); 754 if (error == 0 || error == EJUSTRETURN) { 755 KERNEL_PROC_UNLOCK(l); 756 return; 757 } 758 printf("exec %s: error %d\n", path, error); 759 } 760 printf("init: not found\n"); 761 panic("no init"); 762 } 763