1 /* $NetBSD: init_main.c,v 1.221 2003/06/29 22:31:17 fvdl 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 1.221 2003/06/29 22:31:17 fvdl 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 proc0_insert(p, l, &pgrp0, &session0); 265 266 /* 267 * Set P_NOCLDWAIT so that kernel threads are reparented to 268 * init(8) when they exit. init(8) can easily wait them out 269 * for us. 270 */ 271 p->p_flag = P_SYSTEM | P_NOCLDWAIT; 272 p->p_stat = SACTIVE; 273 p->p_nice = NZERO; 274 p->p_emul = &emul_netbsd; 275 #ifdef __HAVE_SYSCALL_INTERN 276 (*p->p_emul->e_syscall_intern)(p); 277 #endif 278 strncpy(p->p_comm, "swapper", MAXCOMLEN); 279 280 l->l_flag = L_INMEM; 281 l->l_stat = LSONPROC; 282 p->p_nrlwps = 1; 283 284 callout_init(&l->l_tsleep_ch); 285 286 /* Create credentials. */ 287 cred0.p_refcnt = 1; 288 p->p_cred = &cred0; 289 p->p_ucred = crget(); 290 p->p_ucred->cr_ngroups = 1; /* group 0 */ 291 292 /* Create the file descriptor table. */ 293 finit(); 294 p->p_fd = &filedesc0.fd_fd; 295 fdinit1(&filedesc0); 296 297 /* Create the CWD info. */ 298 p->p_cwdi = &cwdi0; 299 cwdi0.cwdi_cmask = cmask; 300 cwdi0.cwdi_refcnt = 1; 301 302 /* Create the limits structures. */ 303 p->p_limit = &limit0; 304 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 305 limit0.pl_rlimit[i].rlim_cur = 306 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 307 308 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 309 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 310 maxfiles < nofile ? maxfiles : nofile; 311 312 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 313 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 314 maxproc < maxuprc ? maxproc : maxuprc; 315 316 lim = ptoa(uvmexp.free); 317 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 318 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 319 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 320 limit0.pl_corename = defcorename; 321 limit0.p_refcnt = 1; 322 323 /* 324 * Initialize proc0's vmspace, which uses the kernel pmap. 325 * All kernel processes (which never have user space mappings) 326 * share proc0's vmspace, and thus, the kernel pmap. 327 */ 328 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 329 trunc_page(VM_MAX_ADDRESS)); 330 p->p_vmspace = &vmspace0; 331 332 l->l_addr = proc0paddr; /* XXX */ 333 334 p->p_stats = &pstat0; 335 336 /* 337 * Charge root for one process. 338 */ 339 (void)chgproccnt(0, 1); 340 341 rqinit(); 342 343 /* Configure virtual memory system, set vm rlimits. */ 344 uvm_init_limits(p); 345 346 /* Initialize the file systems. */ 347 #if defined(NFSSERVER) || defined(NFS) 348 nfs_init(); /* initialize server/shared data */ 349 #endif 350 #ifdef NVNODE_IMPLICIT 351 /* 352 * If maximum number of vnodes in namei vnode cache is not explicitly 353 * defined in kernel config, adjust the number such as we use roughly 354 * 0.5% of memory for vnode cache (but not less than NVNODE vnodes). 355 */ 356 usevnodes = (ptoa((unsigned)physmem) / 200) / sizeof(struct vnode); 357 if (usevnodes > desiredvnodes) 358 desiredvnodes = usevnodes; 359 #endif 360 vfsinit(); 361 362 /* Configure the system hardware. This will enable interrupts. */ 363 configure(); 364 365 ubc_init(); /* must be after autoconfig */ 366 367 /* Lock the kernel on behalf of proc0. */ 368 KERNEL_PROC_LOCK(l); 369 370 #ifdef SYSVSHM 371 /* Initialize System V style shared memory. */ 372 shminit(); 373 #endif 374 375 #ifdef SYSVSEM 376 /* Initialize System V style semaphores. */ 377 seminit(); 378 #endif 379 380 #ifdef SYSVMSG 381 /* Initialize System V style message queues. */ 382 msginit(); 383 #endif 384 385 386 #ifdef P1003_1B_SEMAPHORE 387 /* Initialize posix semaphores */ 388 ksem_init(); 389 #endif 390 /* Attach pseudo-devices. */ 391 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 392 (*pdev->pdev_attach)(pdev->pdev_count); 393 394 /* 395 * Initialize protocols. Block reception of incoming packets 396 * until everything is ready. 397 */ 398 s = splnet(); 399 ifinit(); 400 domaininit(); 401 if_attachdomain(); 402 splx(s); 403 404 #ifdef GPROF 405 /* Initialize kernel profiling. */ 406 kmstartup(); 407 #endif 408 409 /* Initialize system accouting. */ 410 acct_init(); 411 412 #ifdef SYSTRACE 413 systrace_init(); 414 #endif 415 /* 416 * Initialize signal-related data structures, and signal state 417 * for proc0. 418 */ 419 signal_init(); 420 p->p_sigacts = &sigacts0; 421 siginit(p); 422 423 /* Kick off timeout driven events by calling first time. */ 424 schedcpu(NULL); 425 426 /* 427 * Create process 1 (init(8)). We do this now, as Unix has 428 * historically had init be process 1, and changing this would 429 * probably upset a lot of people. 430 * 431 * Note that process 1 won't immediately exec init(8), but will 432 * wait for us to inform it that the root file system has been 433 * mounted. 434 */ 435 if (fork1(l, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 436 panic("fork init"); 437 438 /* 439 * Create any kernel threads who's creation was deferred because 440 * initproc had not yet been created. 441 */ 442 kthread_run_deferred_queue(); 443 444 /* 445 * Now that device driver threads have been created, wait for 446 * them to finish any deferred autoconfiguration. Note we don't 447 * need to lock this semaphore, since we haven't booted any 448 * secondary processors, yet. 449 */ 450 while (config_pending) 451 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 452 453 /* 454 * Finalize configuration now that all real devices have been 455 * found. This needs to be done before the root device is 456 * selected, since finalization may create the root device. 457 */ 458 config_finalize(); 459 460 /* 461 * Now that autoconfiguration has completed, we can determine 462 * the root and dump devices. 463 */ 464 cpu_rootconf(); 465 cpu_dumpconf(); 466 467 /* Mount the root file system. */ 468 do { 469 domountroothook(); 470 if ((error = vfs_mountroot())) { 471 printf("cannot mount root, error = %d\n", error); 472 boothowto |= RB_ASKNAME; 473 setroot(root_device, 474 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 475 } 476 } while (error != 0); 477 mountroothook_destroy(); 478 479 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 480 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 481 482 /* 483 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 484 * reference it. 485 */ 486 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 487 panic("cannot find root vnode"); 488 cwdi0.cwdi_cdir = rootvnode; 489 VREF(cwdi0.cwdi_cdir); 490 VOP_UNLOCK(rootvnode, 0); 491 cwdi0.cwdi_rdir = NULL; 492 493 /* 494 * Now that root is mounted, we can fixup initproc's CWD 495 * info. All other processes are kthreads, which merely 496 * share proc0's CWD info. 497 */ 498 initproc->p_cwdi->cwdi_cdir = rootvnode; 499 VREF(initproc->p_cwdi->cwdi_cdir); 500 initproc->p_cwdi->cwdi_rdir = NULL; 501 502 /* 503 * Now can look at time, having had a chance to verify the time 504 * from the file system. Reset p->p_rtime as it may have been 505 * munched in mi_switch() after the time got set. 506 */ 507 proclist_lock_read(); 508 s = splsched(); 509 for (p = LIST_FIRST(&allproc); p != NULL; 510 p = LIST_NEXT(p, p_list)) { 511 p->p_stats->p_start = mono_time = boottime = time; 512 for (l = LIST_FIRST(&p->p_lwps); l != NULL; 513 l = LIST_NEXT(l, l_sibling)) 514 if (l->l_cpu != NULL) 515 l->l_cpu->ci_schedstate.spc_runtime = time; 516 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 517 } 518 splx(s); 519 proclist_unlock_read(); 520 521 /* Create the pageout daemon kernel thread. */ 522 uvm_swap_init(); 523 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 524 panic("fork pagedaemon"); 525 526 /* Create the process reaper kernel thread. */ 527 if (kthread_create1(reaper, NULL, NULL, "reaper")) 528 panic("fork reaper"); 529 530 /* Create the filesystem syncer kernel thread. */ 531 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 532 panic("fork syncer"); 533 534 /* Create the aiodone daemon kernel thread. */ 535 if (kthread_create1(uvm_aiodone_daemon, NULL, &uvm.aiodoned_proc, 536 "aiodoned")) 537 panic("fork aiodoned"); 538 539 #if defined(MULTIPROCESSOR) 540 /* Boot the secondary processors. */ 541 cpu_boot_secondary_processors(); 542 #endif 543 544 /* Initialize exec structures */ 545 exec_init(1); 546 547 #ifndef PIPE_SOCKETPAIR 548 /* Initialize pipe structures */ 549 pipe_init(); 550 #endif 551 552 /* 553 * Okay, now we can let init(8) exec! It's off to userland! 554 */ 555 start_init_exec = 1; 556 wakeup((void *)&start_init_exec); 557 558 /* The scheduler is an infinite loop. */ 559 uvm_scheduler(); 560 /* NOTREACHED */ 561 } 562 563 static void 564 check_console(struct proc *p) 565 { 566 struct nameidata nd; 567 int error; 568 569 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 570 error = namei(&nd); 571 if (error == 0) 572 vrele(nd.ni_vp); 573 else if (error == ENOENT) 574 printf("warning: no /dev/console\n"); 575 else 576 printf("warning: lookup /dev/console: error %d\n", error); 577 } 578 579 /* 580 * List of paths to try when searching for "init". 581 */ 582 static const char *initpaths[] = { 583 "/sbin/init", 584 "/sbin/oinit", 585 "/sbin/init.bak", 586 NULL, 587 }; 588 589 /* 590 * Start the initial user process; try exec'ing each pathname in "initpaths". 591 * The program is invoked with one argument containing the boot flags. 592 */ 593 static void 594 start_init(void *arg) 595 { 596 struct lwp *l = arg; 597 struct proc *p = l->l_proc; 598 vaddr_t addr; 599 struct sys_execve_args /* { 600 syscallarg(const char *) path; 601 syscallarg(char * const *) argp; 602 syscallarg(char * const *) envp; 603 } */ args; 604 int options, i, error; 605 register_t retval[2]; 606 char flags[4], *flagsp; 607 const char *path, *slash; 608 char *ucp, **uap, *arg0, *arg1 = NULL; 609 char ipath[129]; 610 int ipx, len; 611 612 /* 613 * Now in process 1. 614 */ 615 strncpy(p->p_comm, "init", MAXCOMLEN); 616 617 /* 618 * Wait for main() to tell us that it's safe to exec. 619 */ 620 while (start_init_exec == 0) 621 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 622 623 /* 624 * This is not the right way to do this. We really should 625 * hand-craft a descriptor onto /dev/console to hand to init, 626 * but that's a _lot_ more work, and the benefit from this easy 627 * hack makes up for the "good is the enemy of the best" effect. 628 */ 629 check_console(p); 630 631 /* 632 * Need just enough stack to hold the faked-up "execve()" arguments. 633 */ 634 addr = (vaddr_t)STACK_ALLOC(USRSTACK, PAGE_SIZE); 635 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 636 NULL, UVM_UNKNOWN_OFFSET, 0, 637 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 638 UVM_ADV_NORMAL, 639 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 640 panic("init: couldn't allocate argument space"); 641 p->p_vmspace->vm_maxsaddr = (caddr_t)STACK_MAX(addr, PAGE_SIZE); 642 643 ipx = 0; 644 while (1) { 645 if (boothowto & RB_ASKNAME) { 646 printf("init path"); 647 if (initpaths[ipx]) 648 printf(" (default %s)", initpaths[ipx]); 649 printf(": "); 650 len = cngetsn(ipath, sizeof(ipath)-1); 651 if (len == 0) { 652 if (initpaths[ipx]) 653 path = initpaths[ipx++]; 654 else 655 continue; 656 } else { 657 ipath[len] = '\0'; 658 path = ipath; 659 } 660 } else { 661 if ((path = initpaths[ipx++]) == NULL) 662 break; 663 } 664 665 ucp = (char *)USRSTACK; 666 667 /* 668 * Construct the boot flag argument. 669 */ 670 flagsp = flags; 671 *flagsp++ = '-'; 672 options = 0; 673 674 if (boothowto & RB_SINGLE) { 675 *flagsp++ = 's'; 676 options = 1; 677 } 678 #ifdef notyet 679 if (boothowto & RB_FASTBOOT) { 680 *flagsp++ = 'f'; 681 options = 1; 682 } 683 #endif 684 685 /* 686 * Move out the flags (arg 1), if necessary. 687 */ 688 if (options != 0) { 689 *flagsp++ = '\0'; 690 i = flagsp - flags; 691 #ifdef DEBUG 692 printf("init: copying out flags `%s' %d\n", flags, i); 693 #endif 694 arg1 = STACK_ALLOC(ucp, i); 695 ucp = STACK_MAX(arg1, i); 696 (void)copyout((caddr_t)flags, arg1, i); 697 } 698 699 /* 700 * Move out the file name (also arg 0). 701 */ 702 i = strlen(path) + 1; 703 #ifdef DEBUG 704 printf("init: copying out path `%s' %d\n", path, i); 705 #else 706 if (boothowto & RB_ASKNAME || path != initpaths[0]) 707 printf("init: trying %s\n", path); 708 #endif 709 arg0 = STACK_ALLOC(ucp, i); 710 ucp = STACK_MAX(arg0, i); 711 (void)copyout((caddr_t)path, arg0, i); 712 713 /* 714 * Move out the arg pointers. 715 */ 716 ucp = (caddr_t)STACK_ALIGN(ucp, ALIGNBYTES); 717 uap = (char **)STACK_ALLOC(ucp, sizeof(char *) * 3); 718 SCARG(&args, path) = arg0; 719 SCARG(&args, argp) = uap; 720 SCARG(&args, envp) = NULL; 721 slash = strrchr(path, '/'); 722 if (slash) 723 (void)suword((caddr_t)uap++, 724 (long)arg0 + (slash + 1 - path)); 725 else 726 (void)suword((caddr_t)uap++, (long)arg0); 727 if (options != 0) 728 (void)suword((caddr_t)uap++, (long)arg1); 729 (void)suword((caddr_t)uap++, 0); /* terminator */ 730 731 /* 732 * Now try to exec the program. If can't for any reason 733 * other than it doesn't exist, complain. 734 */ 735 error = sys_execve(LIST_FIRST(&p->p_lwps), &args, retval); 736 if (error == 0 || error == EJUSTRETURN) { 737 KERNEL_PROC_UNLOCK(l); 738 return; 739 } 740 printf("exec %s: error %d\n", path, error); 741 } 742 printf("init: not found\n"); 743 panic("no init"); 744 } 745