init_main.c revision 1.209
1 /* $NetBSD: init_main.c,v 1.209 2002/10/23 09:14:12 jdolecek 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 1.209 2002/10/23 09:14:12 jdolecek 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 56 #include "rnd.h" 57 58 #include <sys/param.h> 59 #include <sys/acct.h> 60 #include <sys/filedesc.h> 61 #include <sys/file.h> 62 #include <sys/errno.h> 63 #include <sys/callout.h> 64 #include <sys/kernel.h> 65 #include <sys/mount.h> 66 #include <sys/proc.h> 67 #include <sys/kthread.h> 68 #include <sys/resourcevar.h> 69 #include <sys/signalvar.h> 70 #include <sys/systm.h> 71 #include <sys/vnode.h> 72 #include <sys/tty.h> 73 #include <sys/conf.h> 74 #include <sys/disklabel.h> 75 #include <sys/buf.h> 76 #include <sys/device.h> 77 #include <sys/disk.h> 78 #include <sys/exec.h> 79 #include <sys/socketvar.h> 80 #include <sys/protosw.h> 81 #include <sys/reboot.h> 82 #include <sys/user.h> 83 #include <sys/sysctl.h> 84 #include <sys/event.h> 85 #ifdef SYSVSHM 86 #include <sys/shm.h> 87 #endif 88 #ifdef SYSVSEM 89 #include <sys/sem.h> 90 #endif 91 #ifdef SYSVMSG 92 #include <sys/msg.h> 93 #endif 94 #ifdef SYSTRACE 95 #include <sys/systrace.h> 96 #endif 97 #include <sys/domain.h> 98 #include <sys/mbuf.h> 99 #include <sys/namei.h> 100 #if NRND > 0 101 #include <sys/rnd.h> 102 #endif 103 #ifndef PIPE_SOCKETPAIR 104 #include <sys/pipe.h> 105 #endif 106 107 #include <sys/syscall.h> 108 #include <sys/syscallargs.h> 109 110 #include <ufs/ufs/quota.h> 111 112 #include <miscfs/genfs/genfs.h> 113 #include <miscfs/syncfs/syncfs.h> 114 115 #include <machine/cpu.h> 116 117 #include <uvm/uvm.h> 118 119 #include <dev/cons.h> 120 121 #include <net/if.h> 122 #include <net/raw_cb.h> 123 124 const char copyright[] = 125 "Copyright (c) 1996, 1997, 1998, 1999, 2000, 2001, 2002\n" 126 " The NetBSD Foundation, Inc. All rights reserved.\n" 127 "Copyright (c) 1982, 1986, 1989, 1991, 1993\n" 128 " The Regents of the University of California. All rights reserved.\n" 129 "\n"; 130 131 /* Components of the first process -- never freed. */ 132 struct session session0; 133 struct pgrp pgrp0; 134 struct proc proc0; 135 struct pcred cred0; 136 struct filedesc0 filedesc0; 137 struct cwdinfo cwdi0; 138 struct plimit limit0; 139 struct vmspace vmspace0; 140 struct sigacts sigacts0; 141 #ifndef curproc 142 struct proc *curproc = &proc0; 143 #endif 144 struct proc *initproc; 145 146 int cmask = CMASK; 147 extern struct user *proc0paddr; 148 149 struct vnode *rootvp, *swapdev_vp; 150 int boothowto; 151 int cold = 1; /* still working on startup */ 152 struct timeval boottime; 153 154 __volatile int start_init_exec; /* semaphore for start_init() */ 155 156 static void check_console(struct proc *p); 157 static void start_init(void *); 158 void main(void); 159 160 extern const struct emul emul_netbsd; /* defined in kern_exec.c */ 161 162 /* 163 * System startup; initialize the world, create process 0, mount root 164 * filesystem, and fork to create init and pagedaemon. Most of the 165 * hard work is done in the lower-level initialization routines including 166 * startup(), which does memory initialization and autoconfiguration. 167 */ 168 void 169 main(void) 170 { 171 struct proc *p; 172 struct pdevinit *pdev; 173 int s, error; 174 u_int i; 175 rlim_t lim; 176 extern struct pdevinit pdevinit[]; 177 extern void schedcpu(void *); 178 #if defined(NFSSERVER) || defined(NFS) 179 extern void nfs_init(void); 180 #endif 181 #ifdef NVNODE_IMPLICIT 182 int usevnodes; 183 #endif 184 185 /* 186 * Initialize the current process pointer (curproc) before 187 * any possible traps/probes to simplify trap processing. 188 */ 189 simple_lock_init(&proc0.p_raslock); 190 p = &proc0; 191 curproc = p; 192 p->p_cpu = curcpu(); 193 /* 194 * Attempt to find console and initialize 195 * in case of early panic or other messages. 196 */ 197 consinit(); 198 printf("%s", copyright); 199 200 KERNEL_LOCK_INIT(); 201 202 uvm_init(); 203 204 /* Do machine-dependent initialization. */ 205 cpu_startup(); 206 207 /* Initialize callouts. */ 208 callout_startup(); 209 210 /* 211 * Initialize mbuf's. Do this now because we might attempt to 212 * allocate mbufs or mbuf clusters during autoconfiguration. 213 */ 214 mbinit(); 215 216 /* Initialize kqueues. */ 217 kqueue_init(); 218 219 /* Initialize sockets. */ 220 soinit(); 221 222 /* 223 * The following 3 things must be done before autoconfiguration. 224 */ 225 disk_init(); /* initialize disk list */ 226 tty_init(); /* initialize tty list */ 227 #if NRND > 0 228 rnd_init(); /* initialize RNG */ 229 #endif 230 231 /* Initialize the sysctl subsystem. */ 232 sysctl_init(); 233 234 /* 235 * Initialize process and pgrp structures. 236 */ 237 procinit(); 238 239 /* 240 * Create process 0 (the swapper). 241 */ 242 s = proclist_lock_write(); 243 LIST_INSERT_HEAD(&allproc, p, p_list); 244 LIST_INSERT_HEAD(PIDHASH(p->p_pid), p, p_hash); 245 proclist_unlock_write(s); 246 247 p->p_pgrp = &pgrp0; 248 LIST_INSERT_HEAD(PGRPHASH(0), &pgrp0, pg_hash); 249 LIST_INIT(&pgrp0.pg_members); 250 LIST_INSERT_HEAD(&pgrp0.pg_members, p, p_pglist); 251 252 pgrp0.pg_session = &session0; 253 session0.s_count = 1; 254 session0.s_sid = p->p_pid; 255 session0.s_leader = p; 256 257 /* 258 * Set P_NOCLDWAIT so that kernel threads are reparented to 259 * init(8) when they exit. init(8) can easily wait them out 260 * for us. 261 */ 262 p->p_flag = P_INMEM | P_SYSTEM | P_NOCLDWAIT; 263 p->p_stat = SONPROC; 264 p->p_nice = NZERO; 265 p->p_emul = &emul_netbsd; 266 #ifdef __HAVE_SYSCALL_INTERN 267 (*p->p_emul->e_syscall_intern)(p); 268 #endif 269 strncpy(p->p_comm, "swapper", MAXCOMLEN); 270 271 callout_init(&p->p_realit_ch); 272 callout_init(&p->p_tsleep_ch); 273 274 /* Create credentials. */ 275 cred0.p_refcnt = 1; 276 p->p_cred = &cred0; 277 p->p_ucred = crget(); 278 p->p_ucred->cr_ngroups = 1; /* group 0 */ 279 280 /* Create the file descriptor table. */ 281 finit(); 282 p->p_fd = &filedesc0.fd_fd; 283 fdinit1(&filedesc0); 284 285 /* Create the CWD info. */ 286 p->p_cwdi = &cwdi0; 287 cwdi0.cwdi_cmask = cmask; 288 cwdi0.cwdi_refcnt = 1; 289 290 /* Create the limits structures. */ 291 p->p_limit = &limit0; 292 for (i = 0; i < sizeof(p->p_rlimit)/sizeof(p->p_rlimit[0]); i++) 293 limit0.pl_rlimit[i].rlim_cur = 294 limit0.pl_rlimit[i].rlim_max = RLIM_INFINITY; 295 296 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_max = maxfiles; 297 limit0.pl_rlimit[RLIMIT_NOFILE].rlim_cur = 298 maxfiles < NOFILE ? maxfiles : NOFILE; 299 300 limit0.pl_rlimit[RLIMIT_NPROC].rlim_max = maxproc; 301 limit0.pl_rlimit[RLIMIT_NPROC].rlim_cur = 302 maxproc < MAXUPRC ? maxproc : MAXUPRC; 303 304 lim = ptoa(uvmexp.free); 305 limit0.pl_rlimit[RLIMIT_RSS].rlim_max = lim; 306 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_max = lim; 307 limit0.pl_rlimit[RLIMIT_MEMLOCK].rlim_cur = lim / 3; 308 limit0.pl_corename = defcorename; 309 limit0.p_refcnt = 1; 310 311 /* 312 * Initialize proc0's vmspace, which uses the kernel pmap. 313 * All kernel processes (which never have user space mappings) 314 * share proc0's vmspace, and thus, the kernel pmap. 315 */ 316 uvmspace_init(&vmspace0, pmap_kernel(), round_page(VM_MIN_ADDRESS), 317 trunc_page(VM_MAX_ADDRESS)); 318 p->p_vmspace = &vmspace0; 319 320 p->p_addr = proc0paddr; /* XXX */ 321 322 /* 323 * We continue to place resource usage info in the 324 * user struct so they're pageable. 325 */ 326 p->p_stats = &p->p_addr->u_stats; 327 328 /* 329 * Charge root for one process. 330 */ 331 (void)chgproccnt(0, 1); 332 333 rqinit(); 334 335 /* Configure virtual memory system, set vm rlimits. */ 336 uvm_init_limits(p); 337 338 /* Initialize the file systems. */ 339 #if defined(NFSSERVER) || defined(NFS) 340 nfs_init(); /* initialize server/shared data */ 341 #endif 342 #ifdef NVNODE_IMPLICIT 343 /* 344 * If maximum number of vnodes in namei vnode cache is not explicitly 345 * defined in kernel config, adjust the number such as we use roughly 346 * 0.5% of memory for vnode cache (but not less than NVNODE vnodes). 347 */ 348 usevnodes = (ptoa((unsigned)physmem) / 200) / sizeof(struct vnode); 349 if (usevnodes > desiredvnodes) 350 desiredvnodes = usevnodes; 351 #endif 352 vfsinit(); 353 354 /* Configure the system hardware. This will enable interrupts. */ 355 configure(); 356 357 ubc_init(); /* must be after autoconfig */ 358 359 /* Lock the kernel on behalf of proc0. */ 360 KERNEL_PROC_LOCK(p); 361 362 #ifdef SYSVSHM 363 /* Initialize System V style shared memory. */ 364 shminit(); 365 #endif 366 367 #ifdef SYSVSEM 368 /* Initialize System V style semaphores. */ 369 seminit(); 370 #endif 371 372 #ifdef SYSVMSG 373 /* Initialize System V style message queues. */ 374 msginit(); 375 #endif 376 377 /* Attach pseudo-devices. */ 378 for (pdev = pdevinit; pdev->pdev_attach != NULL; pdev++) 379 (*pdev->pdev_attach)(pdev->pdev_count); 380 381 /* 382 * Initialize protocols. Block reception of incoming packets 383 * until everything is ready. 384 */ 385 s = splnet(); 386 ifinit(); 387 domaininit(); 388 if_attachdomain(); 389 splx(s); 390 391 #ifdef GPROF 392 /* Initialize kernel profiling. */ 393 kmstartup(); 394 #endif 395 396 /* Initialize system accouting. */ 397 acct_init(); 398 399 #ifdef SYSTRACE 400 systrace_init(); 401 #endif 402 /* 403 * Initialize signal-related data structures, and signal state 404 * for proc0. 405 */ 406 signal_init(); 407 p->p_sigacts = &sigacts0; 408 siginit(p); 409 410 /* Kick off timeout driven events by calling first time. */ 411 schedcpu(NULL); 412 413 /* 414 * Create process 1 (init(8)). We do this now, as Unix has 415 * historically had init be process 1, and changing this would 416 * probably upset a lot of people. 417 * 418 * Note that process 1 won't immediately exec init(8), but will 419 * wait for us to inform it that the root file system has been 420 * mounted. 421 */ 422 if (fork1(p, 0, SIGCHLD, NULL, 0, start_init, NULL, NULL, &initproc)) 423 panic("fork init"); 424 425 /* 426 * Create any kernel threads who's creation was deferred because 427 * initproc had not yet been created. 428 */ 429 kthread_run_deferred_queue(); 430 431 /* 432 * Now that device driver threads have been created, wait for 433 * them to finish any deferred autoconfiguration. Note we don't 434 * need to lock this semaphore, since we haven't booted any 435 * secondary processors, yet. 436 */ 437 while (config_pending) 438 (void) tsleep((void *)&config_pending, PWAIT, "cfpend", 0); 439 440 /* 441 * Finalize configuration now that all real devices have been 442 * found. This needs to be done before the root device is 443 * selected, since finalization may create the root device. 444 */ 445 config_finalize(); 446 447 /* 448 * Now that autoconfiguration has completed, we can determine 449 * the root and dump devices. 450 */ 451 cpu_rootconf(); 452 cpu_dumpconf(); 453 454 /* Mount the root file system. */ 455 do { 456 domountroothook(); 457 if ((error = vfs_mountroot())) { 458 printf("cannot mount root, error = %d\n", error); 459 boothowto |= RB_ASKNAME; 460 setroot(root_device, 461 (rootdev != NODEV) ? DISKPART(rootdev) : 0); 462 } 463 } while (error != 0); 464 mountroothook_destroy(); 465 466 CIRCLEQ_FIRST(&mountlist)->mnt_flag |= MNT_ROOTFS; 467 CIRCLEQ_FIRST(&mountlist)->mnt_op->vfs_refcount++; 468 469 /* 470 * Get the vnode for '/'. Set filedesc0.fd_fd.fd_cdir to 471 * reference it. 472 */ 473 if (VFS_ROOT(CIRCLEQ_FIRST(&mountlist), &rootvnode)) 474 panic("cannot find root vnode"); 475 cwdi0.cwdi_cdir = rootvnode; 476 VREF(cwdi0.cwdi_cdir); 477 VOP_UNLOCK(rootvnode, 0); 478 cwdi0.cwdi_rdir = NULL; 479 480 /* 481 * Now that root is mounted, we can fixup initproc's CWD 482 * info. All other processes are kthreads, which merely 483 * share proc0's CWD info. 484 */ 485 initproc->p_cwdi->cwdi_cdir = rootvnode; 486 VREF(initproc->p_cwdi->cwdi_cdir); 487 initproc->p_cwdi->cwdi_rdir = NULL; 488 489 /* 490 * Now can look at time, having had a chance to verify the time 491 * from the file system. Reset p->p_rtime as it may have been 492 * munched in mi_switch() after the time got set. 493 */ 494 proclist_lock_read(); 495 s = splsched(); 496 for (p = LIST_FIRST(&allproc); p != NULL; 497 p = LIST_NEXT(p, p_list)) { 498 p->p_stats->p_start = mono_time = boottime = time; 499 if (p->p_cpu != NULL) 500 p->p_cpu->ci_schedstate.spc_runtime = time; 501 p->p_rtime.tv_sec = p->p_rtime.tv_usec = 0; 502 } 503 splx(s); 504 proclist_unlock_read(); 505 506 /* Create the pageout daemon kernel thread. */ 507 uvm_swap_init(); 508 if (kthread_create1(uvm_pageout, NULL, NULL, "pagedaemon")) 509 panic("fork pagedaemon"); 510 511 /* Create the process reaper kernel thread. */ 512 if (kthread_create1(reaper, NULL, NULL, "reaper")) 513 panic("fork reaper"); 514 515 /* Create the filesystem syncer kernel thread. */ 516 if (kthread_create1(sched_sync, NULL, NULL, "ioflush")) 517 panic("fork syncer"); 518 519 /* Create the aiodone daemon kernel thread. */ 520 if (kthread_create1(uvm_aiodone_daemon, NULL, NULL, "aiodoned")) 521 panic("fork aiodoned"); 522 523 #if defined(MULTIPROCESSOR) 524 /* Boot the secondary processors. */ 525 cpu_boot_secondary_processors(); 526 #endif 527 528 /* Initialize exec structures */ 529 exec_init(1); 530 531 #ifndef PIPE_SOCKETPAIR 532 /* Initialize pipe structures */ 533 pipe_init(); 534 #endif 535 536 /* 537 * Okay, now we can let init(8) exec! It's off to userland! 538 */ 539 start_init_exec = 1; 540 wakeup((void *)&start_init_exec); 541 542 /* The scheduler is an infinite loop. */ 543 uvm_scheduler(); 544 /* NOTREACHED */ 545 } 546 547 static void 548 check_console(struct proc *p) 549 { 550 struct nameidata nd; 551 int error; 552 553 NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, "/dev/console", p); 554 error = namei(&nd); 555 if (error == 0) 556 vrele(nd.ni_vp); 557 else if (error == ENOENT) 558 printf("warning: no /dev/console\n"); 559 else 560 printf("warning: lookup /dev/console: error %d\n", error); 561 } 562 563 /* 564 * List of paths to try when searching for "init". 565 */ 566 static const char *initpaths[] = { 567 "/sbin/init", 568 "/sbin/oinit", 569 "/sbin/init.bak", 570 NULL, 571 }; 572 573 /* 574 * Start the initial user process; try exec'ing each pathname in "initpaths". 575 * The program is invoked with one argument containing the boot flags. 576 */ 577 static void 578 start_init(void *arg) 579 { 580 struct proc *p = arg; 581 vaddr_t addr; 582 struct sys_execve_args /* { 583 syscallarg(const char *) path; 584 syscallarg(char * const *) argp; 585 syscallarg(char * const *) envp; 586 } */ args; 587 int options, i, error; 588 register_t retval[2]; 589 char flags[4], *flagsp; 590 const char *path, *slash; 591 char *ucp, **uap, *arg0, *arg1 = NULL; 592 char ipath[129]; 593 int ipx, len; 594 595 /* 596 * Now in process 1. 597 */ 598 strncpy(p->p_comm, "init", MAXCOMLEN); 599 600 /* 601 * Wait for main() to tell us that it's safe to exec. 602 */ 603 while (start_init_exec == 0) 604 (void) tsleep((void *)&start_init_exec, PWAIT, "initexec", 0); 605 606 /* 607 * This is not the right way to do this. We really should 608 * hand-craft a descriptor onto /dev/console to hand to init, 609 * but that's a _lot_ more work, and the benefit from this easy 610 * hack makes up for the "good is the enemy of the best" effect. 611 */ 612 check_console(p); 613 614 /* 615 * Need just enough stack to hold the faked-up "execve()" arguments. 616 */ 617 addr = USRSTACK - PAGE_SIZE; 618 if (uvm_map(&p->p_vmspace->vm_map, &addr, PAGE_SIZE, 619 NULL, UVM_UNKNOWN_OFFSET, 0, 620 UVM_MAPFLAG(UVM_PROT_ALL, UVM_PROT_ALL, UVM_INH_COPY, 621 UVM_ADV_NORMAL, 622 UVM_FLAG_FIXED|UVM_FLAG_OVERLAY|UVM_FLAG_COPYONW)) != 0) 623 panic("init: couldn't allocate argument space"); 624 p->p_vmspace->vm_maxsaddr = (caddr_t)addr; 625 626 ipx = 0; 627 while (1) { 628 if (boothowto & RB_ASKNAME) { 629 printf("init path"); 630 if (initpaths[ipx]) 631 printf(" (default %s)", initpaths[ipx]); 632 printf(": "); 633 len = cngetsn(ipath, sizeof(ipath)-1); 634 if (len == 0) { 635 if (initpaths[ipx]) 636 path = initpaths[ipx++]; 637 else 638 continue; 639 } else { 640 ipath[len] = '\0'; 641 path = ipath; 642 } 643 } else { 644 if ((path = initpaths[ipx++]) == NULL) 645 break; 646 } 647 648 ucp = (char *)(addr + PAGE_SIZE); 649 650 /* 651 * Construct the boot flag argument. 652 */ 653 flagsp = flags; 654 *flagsp++ = '-'; 655 options = 0; 656 657 if (boothowto & RB_SINGLE) { 658 *flagsp++ = 's'; 659 options = 1; 660 } 661 #ifdef notyet 662 if (boothowto & RB_FASTBOOT) { 663 *flagsp++ = 'f'; 664 options = 1; 665 } 666 #endif 667 668 /* 669 * Move out the flags (arg 1), if necessary. 670 */ 671 if (options != 0) { 672 *flagsp++ = '\0'; 673 i = flagsp - flags; 674 #ifdef DEBUG 675 printf("init: copying out flags `%s' %d\n", flags, i); 676 #endif 677 (void)copyout((caddr_t)flags, (caddr_t)(ucp -= i), i); 678 arg1 = ucp; 679 } 680 681 /* 682 * Move out the file name (also arg 0). 683 */ 684 i = strlen(path) + 1; 685 #ifdef DEBUG 686 printf("init: copying out path `%s' %d\n", path, i); 687 #else 688 if (boothowto & RB_ASKNAME || path != initpaths[0]) 689 printf("init: trying %s\n", path); 690 #endif 691 (void)copyout((caddr_t)path, (caddr_t)(ucp -= i), i); 692 arg0 = ucp; 693 694 /* 695 * Move out the arg pointers. 696 */ 697 uap = (char **)((long)ucp & ~ALIGNBYTES); 698 (void)suword((caddr_t)--uap, 0); /* terminator */ 699 if (options != 0) 700 (void)suword((caddr_t)--uap, (long)arg1); 701 slash = strrchr(path, '/'); 702 if (slash) 703 (void)suword((caddr_t)--uap, 704 (long)arg0 + (slash + 1 - path)); 705 else 706 (void)suword((caddr_t)--uap, (long)arg0); 707 708 /* 709 * Point at the arguments. 710 */ 711 SCARG(&args, path) = arg0; 712 SCARG(&args, argp) = uap; 713 SCARG(&args, envp) = NULL; 714 715 /* 716 * Now try to exec the program. If can't for any reason 717 * other than it doesn't exist, complain. 718 */ 719 error = sys_execve(p, &args, retval); 720 if (error == 0 || error == EJUSTRETURN) { 721 KERNEL_PROC_UNLOCK(p); 722 return; 723 } 724 printf("exec %s: error %d\n", path, error); 725 } 726 printf("init: not found\n"); 727 panic("no init"); 728 } 729
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