init.c revision 59871
1/*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Donn Seeley at Berkeley Software Design, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. 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 37#ifndef lint 38static const char copyright[] = 39"@(#) Copyright (c) 1991, 1993\n\ 40 The Regents of the University of California. All rights reserved.\n"; 41#endif /* not lint */ 42 43#ifndef lint 44#if 0 45static char sccsid[] = "@(#)init.c 8.1 (Berkeley) 7/15/93"; 46#endif 47static const char rcsid[] = 48 "$FreeBSD: head/sbin/init/init.c 59871 2000-05-01 20:20:05Z asmodai $"; 49#endif /* not lint */ 50 51#include <sys/param.h> 52#include <sys/ioctl.h> 53#include <sys/mount.h> 54#include <sys/sysctl.h> 55#include <sys/wait.h> 56#include <sys/stat.h> 57 58#include <db.h> 59#include <errno.h> 60#include <fcntl.h> 61#include <libutil.h> 62#include <signal.h> 63#include <stdio.h> 64#include <stdlib.h> 65#include <string.h> 66#include <syslog.h> 67#include <time.h> 68#include <ttyent.h> 69#include <unistd.h> 70#include <sys/reboot.h> 71#include <err.h> 72 73#ifdef __STDC__ 74#include <stdarg.h> 75#else 76#include <varargs.h> 77#endif 78 79#ifdef SECURE 80#include <pwd.h> 81#endif 82 83#ifdef LOGIN_CAP 84#include <login_cap.h> 85#endif 86 87#include "pathnames.h" 88 89/* 90 * Sleep times; used to prevent thrashing. 91 */ 92#define GETTY_SPACING 5 /* N secs minimum getty spacing */ 93#define GETTY_SLEEP 30 /* sleep N secs after spacing problem */ 94#define GETTY_NSPACE 3 /* max. spacing count to bring reaction */ 95#define WINDOW_WAIT 3 /* wait N secs after starting window */ 96#define STALL_TIMEOUT 30 /* wait N secs after warning */ 97#define DEATH_WATCH 10 /* wait N secs for procs to die */ 98#define DEATH_SCRIPT 120 /* wait for 2min for /etc/rc.shutdown */ 99#define RESOURCE_RC "daemon" 100#define RESOURCE_WINDOW "default" 101#define RESOURCE_GETTY "default" 102 103void handle __P((sig_t, ...)); 104void delset __P((sigset_t *, ...)); 105 106void stall __P((char *, ...)); 107void warning __P((char *, ...)); 108void emergency __P((char *, ...)); 109void disaster __P((int)); 110void badsys __P((int)); 111int runshutdown __P((void)); 112 113/* 114 * We really need a recursive typedef... 115 * The following at least guarantees that the return type of (*state_t)() 116 * is sufficiently wide to hold a function pointer. 117 */ 118typedef long (*state_func_t) __P((void)); 119typedef state_func_t (*state_t) __P((void)); 120 121state_func_t single_user __P((void)); 122state_func_t runcom __P((void)); 123state_func_t read_ttys __P((void)); 124state_func_t multi_user __P((void)); 125state_func_t clean_ttys __P((void)); 126state_func_t catatonia __P((void)); 127state_func_t death __P((void)); 128 129enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT; 130#define FALSE 0 131#define TRUE 1 132 133int Reboot = FALSE; 134int howto = RB_AUTOBOOT; 135 136int devfs; 137 138void transition __P((state_t)); 139state_t requested_transition = runcom; 140 141void setctty __P((char *)); 142 143typedef struct init_session { 144 int se_index; /* index of entry in ttys file */ 145 pid_t se_process; /* controlling process */ 146 time_t se_started; /* used to avoid thrashing */ 147 int se_flags; /* status of session */ 148#define SE_SHUTDOWN 0x1 /* session won't be restarted */ 149#define SE_PRESENT 0x2 /* session is in /etc/ttys */ 150 int se_nspace; /* spacing count */ 151 char *se_device; /* filename of port */ 152 char *se_getty; /* what to run on that port */ 153 char *se_getty_argv_space; /* pre-parsed argument array space */ 154 char **se_getty_argv; /* pre-parsed argument array */ 155 char *se_window; /* window system (started only once) */ 156 char *se_window_argv_space; /* pre-parsed argument array space */ 157 char **se_window_argv; /* pre-parsed argument array */ 158 char *se_type; /* default terminal type */ 159 struct init_session *se_prev; 160 struct init_session *se_next; 161} session_t; 162 163void free_session __P((session_t *)); 164session_t *new_session __P((session_t *, int, struct ttyent *)); 165session_t *sessions; 166 167char **construct_argv __P((char *)); 168void start_window_system __P((session_t *)); 169void collect_child __P((pid_t)); 170pid_t start_getty __P((session_t *)); 171void transition_handler __P((int)); 172void alrm_handler __P((int)); 173void setsecuritylevel __P((int)); 174int getsecuritylevel __P((void)); 175int setupargv __P((session_t *, struct ttyent *)); 176#ifdef LOGIN_CAP 177void setprocresources __P((const char *)); 178#endif 179int clang; 180 181void clear_session_logs __P((session_t *)); 182 183int start_session_db __P((void)); 184void add_session __P((session_t *)); 185void del_session __P((session_t *)); 186session_t *find_session __P((pid_t)); 187DB *session_db; 188 189/* 190 * The mother of all processes. 191 */ 192int 193main(argc, argv) 194 int argc; 195 char **argv; 196{ 197 int c; 198 struct sigaction sa; 199 sigset_t mask; 200 201 202 /* Dispose of random users. */ 203 if (getuid() != 0) 204 errx(1, "%s", strerror(EPERM)); 205 206 /* System V users like to reexec init. */ 207 if (getpid() != 1) { 208#ifdef COMPAT_SYSV_INIT 209 /* So give them what they want */ 210 if (argc > 1) { 211 if (strlen(argv[1]) == 1) { 212 register char runlevel = *argv[1]; 213 register int sig; 214 215 switch (runlevel) { 216 case '0': /* halt + poweroff */ 217 sig = SIGUSR2; 218 break; 219 case '1': /* single-user */ 220 sig = SIGTERM; 221 break; 222 case '6': /* reboot */ 223 sig = SIGINT; 224 break; 225 case 'c': /* block further logins */ 226 sig = SIGTSTP; 227 break; 228 case 'q': /* rescan /etc/ttys */ 229 sig = SIGHUP; 230 break; 231 default: 232 goto invalid; 233 } 234 kill(1, sig); 235 _exit(0); 236 } else 237invalid: 238 errx(1, "invalid run-level ``%s''", argv[1]); 239 } else 240#endif 241 errx(1, "already running"); 242 } 243 /* 244 * Note that this does NOT open a file... 245 * Does 'init' deserve its own facility number? 246 */ 247 openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH); 248 249 /* 250 * Create an initial session. 251 */ 252 if (setsid() < 0) 253 warning("initial setsid() failed: %m"); 254 255 /* 256 * Establish an initial user so that programs running 257 * single user do not freak out and die (like passwd). 258 */ 259 if (setlogin("root") < 0) 260 warning("setlogin() failed: %m"); 261 262 /* 263 * This code assumes that we always get arguments through flags, 264 * never through bits set in some random machine register. 265 */ 266 while ((c = getopt(argc, argv, "dsf")) != -1) 267 switch (c) { 268 case 'd': 269 devfs = 1; 270 break; 271 case 's': 272 requested_transition = single_user; 273 break; 274 case 'f': 275 runcom_mode = FASTBOOT; 276 break; 277 default: 278 warning("unrecognized flag '-%c'", c); 279 break; 280 } 281 282 if (optind != argc) 283 warning("ignoring excess arguments"); 284 285 if (devfs) { 286 mount("devfs", "/dev", MNT_NOEXEC|MNT_RDONLY, 0); 287 } 288 289 /* 290 * We catch or block signals rather than ignore them, 291 * so that they get reset on exec. 292 */ 293 handle(badsys, SIGSYS, 0); 294 handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, 295 SIGBUS, SIGXCPU, SIGXFSZ, 0); 296 handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 297 SIGUSR1, SIGUSR2, 0); 298 handle(alrm_handler, SIGALRM, 0); 299 sigfillset(&mask); 300 delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS, 301 SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 302 SIGUSR1, SIGUSR2, 0); 303 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 304 sigemptyset(&sa.sa_mask); 305 sa.sa_flags = 0; 306 sa.sa_handler = SIG_IGN; 307 (void) sigaction(SIGTTIN, &sa, (struct sigaction *)0); 308 (void) sigaction(SIGTTOU, &sa, (struct sigaction *)0); 309 310 /* 311 * Paranoia. 312 */ 313 close(0); 314 close(1); 315 close(2); 316 317 /* 318 * Start the state machine. 319 */ 320 transition(requested_transition); 321 322 /* 323 * Should never reach here. 324 */ 325 return 1; 326} 327 328/* 329 * Associate a function with a signal handler. 330 */ 331void 332#ifdef __STDC__ 333handle(sig_t handler, ...) 334#else 335handle(va_alist) 336 va_dcl 337#endif 338{ 339 int sig; 340 struct sigaction sa; 341 sigset_t mask_everything; 342 va_list ap; 343#ifndef __STDC__ 344 sig_t handler; 345 346 va_start(ap); 347 handler = va_arg(ap, sig_t); 348#else 349 va_start(ap, handler); 350#endif 351 352 sa.sa_handler = handler; 353 sigfillset(&mask_everything); 354 355 while ((sig = va_arg(ap, int)) != NULL) { 356 sa.sa_mask = mask_everything; 357 /* XXX SA_RESTART? */ 358 sa.sa_flags = sig == SIGCHLD ? SA_NOCLDSTOP : 0; 359 sigaction(sig, &sa, (struct sigaction *) 0); 360 } 361 va_end(ap); 362} 363 364/* 365 * Delete a set of signals from a mask. 366 */ 367void 368#ifdef __STDC__ 369delset(sigset_t *maskp, ...) 370#else 371delset(va_alist) 372 va_dcl 373#endif 374{ 375 int sig; 376 va_list ap; 377#ifndef __STDC__ 378 sigset_t *maskp; 379 380 va_start(ap); 381 maskp = va_arg(ap, sigset_t *); 382#else 383 va_start(ap, maskp); 384#endif 385 386 while ((sig = va_arg(ap, int)) != NULL) 387 sigdelset(maskp, sig); 388 va_end(ap); 389} 390 391/* 392 * Log a message and sleep for a while (to give someone an opportunity 393 * to read it and to save log or hardcopy output if the problem is chronic). 394 * NB: should send a message to the session logger to avoid blocking. 395 */ 396void 397#ifdef __STDC__ 398stall(char *message, ...) 399#else 400stall(va_alist) 401 va_dcl 402#endif 403{ 404 va_list ap; 405#ifndef __STDC__ 406 char *message; 407 408 va_start(ap); 409 message = va_arg(ap, char *); 410#else 411 va_start(ap, message); 412#endif 413 414 vsyslog(LOG_ALERT, message, ap); 415 va_end(ap); 416 sleep(STALL_TIMEOUT); 417} 418 419/* 420 * Like stall(), but doesn't sleep. 421 * If cpp had variadic macros, the two functions could be #defines for another. 422 * NB: should send a message to the session logger to avoid blocking. 423 */ 424void 425#ifdef __STDC__ 426warning(char *message, ...) 427#else 428warning(va_alist) 429 va_dcl 430#endif 431{ 432 va_list ap; 433#ifndef __STDC__ 434 char *message; 435 436 va_start(ap); 437 message = va_arg(ap, char *); 438#else 439 va_start(ap, message); 440#endif 441 442 vsyslog(LOG_ALERT, message, ap); 443 va_end(ap); 444} 445 446/* 447 * Log an emergency message. 448 * NB: should send a message to the session logger to avoid blocking. 449 */ 450void 451#ifdef __STDC__ 452emergency(char *message, ...) 453#else 454emergency(va_alist) 455 va_dcl 456#endif 457{ 458 va_list ap; 459#ifndef __STDC__ 460 char *message; 461 462 va_start(ap); 463 message = va_arg(ap, char *); 464#else 465 va_start(ap, message); 466#endif 467 468 vsyslog(LOG_EMERG, message, ap); 469 va_end(ap); 470} 471 472/* 473 * Catch a SIGSYS signal. 474 * 475 * These may arise if a system does not support sysctl. 476 * We tolerate up to 25 of these, then throw in the towel. 477 */ 478void 479badsys(sig) 480 int sig; 481{ 482 static int badcount = 0; 483 484 if (badcount++ < 25) 485 return; 486 disaster(sig); 487} 488 489/* 490 * Catch an unexpected signal. 491 */ 492void 493disaster(sig) 494 int sig; 495{ 496 emergency("fatal signal: %s", 497 (unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal"); 498 499 sleep(STALL_TIMEOUT); 500 _exit(sig); /* reboot */ 501} 502 503/* 504 * Get the security level of the kernel. 505 */ 506int 507getsecuritylevel() 508{ 509#ifdef KERN_SECURELVL 510 int name[2], curlevel; 511 size_t len; 512 513 name[0] = CTL_KERN; 514 name[1] = KERN_SECURELVL; 515 len = sizeof curlevel; 516 if (sysctl(name, 2, &curlevel, &len, NULL, 0) == -1) { 517 emergency("cannot get kernel security level: %s", 518 strerror(errno)); 519 return (-1); 520 } 521 return (curlevel); 522#else 523 return (-1); 524#endif 525} 526 527/* 528 * Set the security level of the kernel. 529 */ 530void 531setsecuritylevel(newlevel) 532 int newlevel; 533{ 534#ifdef KERN_SECURELVL 535 int name[2], curlevel; 536 537 curlevel = getsecuritylevel(); 538 if (newlevel == curlevel) 539 return; 540 name[0] = CTL_KERN; 541 name[1] = KERN_SECURELVL; 542 if (sysctl(name, 2, NULL, NULL, &newlevel, sizeof newlevel) == -1) { 543 emergency( 544 "cannot change kernel security level from %d to %d: %s", 545 curlevel, newlevel, strerror(errno)); 546 return; 547 } 548#ifdef SECURE 549 warning("kernel security level changed from %d to %d", 550 curlevel, newlevel); 551#endif 552#endif 553} 554 555/* 556 * Change states in the finite state machine. 557 * The initial state is passed as an argument. 558 */ 559void 560transition(s) 561 state_t s; 562{ 563 for (;;) 564 s = (state_t) (*s)(); 565} 566 567/* 568 * Close out the accounting files for a login session. 569 * NB: should send a message to the session logger to avoid blocking. 570 */ 571void 572clear_session_logs(sp) 573 session_t *sp; 574{ 575 char *line = sp->se_device + sizeof(_PATH_DEV) - 1; 576 577 if (logout(line)) 578 logwtmp(line, "", ""); 579} 580 581/* 582 * Start a session and allocate a controlling terminal. 583 * Only called by children of init after forking. 584 */ 585void 586setctty(name) 587 char *name; 588{ 589 int fd; 590 591 (void) revoke(name); 592 if ((fd = open(name, O_RDWR)) == -1) { 593 stall("can't open %s: %m", name); 594 _exit(1); 595 } 596 if (login_tty(fd) == -1) { 597 stall("can't get %s for controlling terminal: %m", name); 598 _exit(1); 599 } 600} 601 602/* 603 * Bring the system up single user. 604 */ 605state_func_t 606single_user() 607{ 608 pid_t pid, wpid; 609 int status; 610 sigset_t mask; 611 char *shell = _PATH_BSHELL; 612 char *argv[2]; 613#ifdef SECURE 614 struct ttyent *typ; 615 struct passwd *pp; 616 static const char banner[] = 617 "Enter root password, or ^D to go multi-user\n"; 618 char *clear, *password; 619#endif 620#ifdef DEBUGSHELL 621 char altshell[128]; 622#endif 623 624 if (Reboot) { 625 /* Instead of going single user, let's reboot the machine */ 626 sync(); 627 alarm(2); 628 pause(); 629 reboot(howto); 630 _exit(0); 631 } 632 633 if ((pid = fork()) == 0) { 634 /* 635 * Start the single user session. 636 */ 637 setctty(_PATH_CONSOLE); 638 639#ifdef SECURE 640 /* 641 * Check the root password. 642 * We don't care if the console is 'on' by default; 643 * it's the only tty that can be 'off' and 'secure'. 644 */ 645 typ = getttynam("console"); 646 pp = getpwnam("root"); 647 if (typ && (typ->ty_status & TTY_SECURE) == 0 && 648 pp && *pp->pw_passwd) { 649 write(2, banner, sizeof banner - 1); 650 for (;;) { 651 clear = getpass("Password:"); 652 if (clear == 0 || *clear == '\0') 653 _exit(0); 654 password = crypt(clear, pp->pw_passwd); 655 bzero(clear, _PASSWORD_LEN); 656 if (strcmp(password, pp->pw_passwd) == 0) 657 break; 658 warning("single-user login failed\n"); 659 } 660 } 661 endttyent(); 662 endpwent(); 663#endif /* SECURE */ 664 665#ifdef DEBUGSHELL 666 { 667 char *cp = altshell; 668 int num; 669 670#define SHREQUEST \ 671 "Enter full pathname of shell or RETURN for " _PATH_BSHELL ": " 672 (void)write(STDERR_FILENO, 673 SHREQUEST, sizeof(SHREQUEST) - 1); 674 while ((num = read(STDIN_FILENO, cp, 1)) != -1 && 675 num != 0 && *cp != '\n' && cp < &altshell[127]) 676 cp++; 677 *cp = '\0'; 678 if (altshell[0] != '\0') 679 shell = altshell; 680 } 681#endif /* DEBUGSHELL */ 682 683 /* 684 * Unblock signals. 685 * We catch all the interesting ones, 686 * and those are reset to SIG_DFL on exec. 687 */ 688 sigemptyset(&mask); 689 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 690 691 /* 692 * Fire off a shell. 693 * If the default one doesn't work, try the Bourne shell. 694 */ 695 argv[0] = "-sh"; 696 argv[1] = 0; 697 execv(shell, argv); 698 emergency("can't exec %s for single user: %m", shell); 699 execv(_PATH_BSHELL, argv); 700 emergency("can't exec %s for single user: %m", _PATH_BSHELL); 701 sleep(STALL_TIMEOUT); 702 _exit(1); 703 } 704 705 if (pid == -1) { 706 /* 707 * We are seriously hosed. Do our best. 708 */ 709 emergency("can't fork single-user shell, trying again"); 710 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 711 continue; 712 return (state_func_t) single_user; 713 } 714 715 requested_transition = 0; 716 do { 717 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 718 collect_child(wpid); 719 if (wpid == -1) { 720 if (errno == EINTR) 721 continue; 722 warning("wait for single-user shell failed: %m; restarting"); 723 return (state_func_t) single_user; 724 } 725 if (wpid == pid && WIFSTOPPED(status)) { 726 warning("init: shell stopped, restarting\n"); 727 kill(pid, SIGCONT); 728 wpid = -1; 729 } 730 } while (wpid != pid && !requested_transition); 731 732 if (requested_transition) 733 return (state_func_t) requested_transition; 734 735 if (!WIFEXITED(status)) { 736 if (WTERMSIG(status) == SIGKILL) { 737 /* 738 * reboot(8) killed shell? 739 */ 740 warning("single user shell terminated."); 741 sleep(STALL_TIMEOUT); 742 _exit(0); 743 } else { 744 warning("single user shell terminated, restarting"); 745 return (state_func_t) single_user; 746 } 747 } 748 749 runcom_mode = FASTBOOT; 750 return (state_func_t) runcom; 751} 752 753/* 754 * Run the system startup script. 755 */ 756state_func_t 757runcom() 758{ 759 pid_t pid, wpid; 760 int status; 761 char *argv[4]; 762 struct sigaction sa; 763 764 if ((pid = fork()) == 0) { 765 sigemptyset(&sa.sa_mask); 766 sa.sa_flags = 0; 767 sa.sa_handler = SIG_IGN; 768 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 769 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 770 771 setctty(_PATH_CONSOLE); 772 773 argv[0] = "sh"; 774 argv[1] = _PATH_RUNCOM; 775 argv[2] = runcom_mode == AUTOBOOT ? "autoboot" : 0; 776 argv[3] = 0; 777 778 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 779 780#ifdef LOGIN_CAP 781 setprocresources(RESOURCE_RC); 782#endif 783 execv(_PATH_BSHELL, argv); 784 stall("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNCOM); 785 _exit(1); /* force single user mode */ 786 } 787 788 if (pid == -1) { 789 emergency("can't fork for %s on %s: %m", 790 _PATH_BSHELL, _PATH_RUNCOM); 791 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 792 continue; 793 sleep(STALL_TIMEOUT); 794 return (state_func_t) single_user; 795 } 796 797 /* 798 * Copied from single_user(). This is a bit paranoid. 799 */ 800 do { 801 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 802 collect_child(wpid); 803 if (wpid == -1) { 804 if (errno == EINTR) 805 continue; 806 warning("wait for %s on %s failed: %m; going to single user mode", 807 _PATH_BSHELL, _PATH_RUNCOM); 808 return (state_func_t) single_user; 809 } 810 if (wpid == pid && WIFSTOPPED(status)) { 811 warning("init: %s on %s stopped, restarting\n", 812 _PATH_BSHELL, _PATH_RUNCOM); 813 kill(pid, SIGCONT); 814 wpid = -1; 815 } 816 } while (wpid != pid); 817 818 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 819 requested_transition == catatonia) { 820 /* /etc/rc executed /sbin/reboot; wait for the end quietly */ 821 sigset_t s; 822 823 sigfillset(&s); 824 for (;;) 825 sigsuspend(&s); 826 } 827 828 if (!WIFEXITED(status)) { 829 warning("%s on %s terminated abnormally, going to single user mode", 830 _PATH_BSHELL, _PATH_RUNCOM); 831 return (state_func_t) single_user; 832 } 833 834 if (WEXITSTATUS(status)) 835 return (state_func_t) single_user; 836 837 runcom_mode = AUTOBOOT; /* the default */ 838 /* NB: should send a message to the session logger to avoid blocking. */ 839 logwtmp("~", "reboot", ""); 840 return (state_func_t) read_ttys; 841} 842 843/* 844 * Open the session database. 845 * 846 * NB: We could pass in the size here; is it necessary? 847 */ 848int 849start_session_db() 850{ 851 if (session_db && (*session_db->close)(session_db)) 852 emergency("session database close: %s", strerror(errno)); 853 if ((session_db = dbopen(NULL, O_RDWR, 0, DB_HASH, NULL)) == 0) { 854 emergency("session database open: %s", strerror(errno)); 855 return (1); 856 } 857 return (0); 858 859} 860 861/* 862 * Add a new login session. 863 */ 864void 865add_session(sp) 866 session_t *sp; 867{ 868 DBT key; 869 DBT data; 870 871 key.data = &sp->se_process; 872 key.size = sizeof sp->se_process; 873 data.data = &sp; 874 data.size = sizeof sp; 875 876 if ((*session_db->put)(session_db, &key, &data, 0)) 877 emergency("insert %d: %s", sp->se_process, strerror(errno)); 878} 879 880/* 881 * Delete an old login session. 882 */ 883void 884del_session(sp) 885 session_t *sp; 886{ 887 DBT key; 888 889 key.data = &sp->se_process; 890 key.size = sizeof sp->se_process; 891 892 if ((*session_db->del)(session_db, &key, 0)) 893 emergency("delete %d: %s", sp->se_process, strerror(errno)); 894} 895 896/* 897 * Look up a login session by pid. 898 */ 899session_t * 900#ifdef __STDC__ 901find_session(pid_t pid) 902#else 903find_session(pid) 904 pid_t pid; 905#endif 906{ 907 DBT key; 908 DBT data; 909 session_t *ret; 910 911 key.data = &pid; 912 key.size = sizeof pid; 913 if ((*session_db->get)(session_db, &key, &data, 0) != 0) 914 return 0; 915 bcopy(data.data, (char *)&ret, sizeof(ret)); 916 return ret; 917} 918 919/* 920 * Construct an argument vector from a command line. 921 */ 922char ** 923construct_argv(command) 924 char *command; 925{ 926 char *strk (char *); 927 register int argc = 0; 928 register char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1) 929 * sizeof (char *)); 930 931 if ((argv[argc++] = strk(command)) == 0) { 932 free(argv); 933 return (NULL); 934 } 935 while ((argv[argc++] = strk((char *) 0)) != NULL) 936 continue; 937 return argv; 938} 939 940/* 941 * Deallocate a session descriptor. 942 */ 943void 944free_session(sp) 945 register session_t *sp; 946{ 947 free(sp->se_device); 948 if (sp->se_getty) { 949 free(sp->se_getty); 950 free(sp->se_getty_argv_space); 951 free(sp->se_getty_argv); 952 } 953 if (sp->se_window) { 954 free(sp->se_window); 955 free(sp->se_window_argv_space); 956 free(sp->se_window_argv); 957 } 958 if (sp->se_type) 959 free(sp->se_type); 960 free(sp); 961} 962 963/* 964 * Allocate a new session descriptor. 965 * Mark it SE_PRESENT. 966 */ 967session_t * 968new_session(sprev, session_index, typ) 969 session_t *sprev; 970 int session_index; 971 register struct ttyent *typ; 972{ 973 register session_t *sp; 974 int fd; 975 976 if ((typ->ty_status & TTY_ON) == 0 || 977 typ->ty_name == 0 || 978 typ->ty_getty == 0) 979 return 0; 980 981 sp = (session_t *) calloc(1, sizeof (session_t)); 982 983 sp->se_index = session_index; 984 sp->se_flags |= SE_PRESENT; 985 986 sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name)); 987 (void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name); 988 989 /* 990 * Attempt to open the device, if we get "device not configured" 991 * then don't add the device to the session list. 992 */ 993 if ((fd = open(sp->se_device, O_RDONLY | O_NONBLOCK, 0)) < 0) { 994 if (errno == ENXIO) { 995 free_session(sp); 996 return (0); 997 } 998 } else 999 close(fd); 1000 1001 if (setupargv(sp, typ) == 0) { 1002 free_session(sp); 1003 return (0); 1004 } 1005 1006 sp->se_next = 0; 1007 if (sprev == 0) { 1008 sessions = sp; 1009 sp->se_prev = 0; 1010 } else { 1011 sprev->se_next = sp; 1012 sp->se_prev = sprev; 1013 } 1014 1015 return sp; 1016} 1017 1018/* 1019 * Calculate getty and if useful window argv vectors. 1020 */ 1021int 1022setupargv(sp, typ) 1023 session_t *sp; 1024 struct ttyent *typ; 1025{ 1026 1027 if (sp->se_getty) { 1028 free(sp->se_getty); 1029 free(sp->se_getty_argv_space); 1030 free(sp->se_getty_argv); 1031 } 1032 sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2); 1033 (void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name); 1034 sp->se_getty_argv_space = strdup(sp->se_getty); 1035 sp->se_getty_argv = construct_argv(sp->se_getty_argv_space); 1036 if (sp->se_getty_argv == 0) { 1037 warning("can't parse getty for port %s", sp->se_device); 1038 free(sp->se_getty); 1039 free(sp->se_getty_argv_space); 1040 sp->se_getty = sp->se_getty_argv_space = 0; 1041 return (0); 1042 } 1043 if (sp->se_window) { 1044 free(sp->se_window); 1045 free(sp->se_window_argv_space); 1046 free(sp->se_window_argv); 1047 } 1048 sp->se_window = sp->se_window_argv_space = 0; 1049 sp->se_window_argv = 0; 1050 if (typ->ty_window) { 1051 sp->se_window = strdup(typ->ty_window); 1052 sp->se_window_argv_space = strdup(sp->se_window); 1053 sp->se_window_argv = construct_argv(sp->se_window_argv_space); 1054 if (sp->se_window_argv == 0) { 1055 warning("can't parse window for port %s", 1056 sp->se_device); 1057 free(sp->se_window_argv_space); 1058 free(sp->se_window); 1059 sp->se_window = sp->se_window_argv_space = 0; 1060 return (0); 1061 } 1062 } 1063 if (sp->se_type) 1064 free(sp->se_type); 1065 sp->se_type = typ->ty_type ? strdup(typ->ty_type) : 0; 1066 return (1); 1067} 1068 1069/* 1070 * Walk the list of ttys and create sessions for each active line. 1071 */ 1072state_func_t 1073read_ttys() 1074{ 1075 int session_index = 0; 1076 register session_t *sp, *snext; 1077 register struct ttyent *typ; 1078 1079 /* 1080 * Destroy any previous session state. 1081 * There shouldn't be any, but just in case... 1082 */ 1083 for (sp = sessions; sp; sp = snext) { 1084 if (sp->se_process) 1085 clear_session_logs(sp); 1086 snext = sp->se_next; 1087 free_session(sp); 1088 } 1089 sessions = 0; 1090 if (start_session_db()) 1091 return (state_func_t) single_user; 1092 1093 /* 1094 * Allocate a session entry for each active port. 1095 * Note that sp starts at 0. 1096 */ 1097 while ((typ = getttyent()) != NULL) 1098 if ((snext = new_session(sp, ++session_index, typ)) != NULL) 1099 sp = snext; 1100 1101 endttyent(); 1102 1103 return (state_func_t) multi_user; 1104} 1105 1106/* 1107 * Start a window system running. 1108 */ 1109void 1110start_window_system(sp) 1111 session_t *sp; 1112{ 1113 pid_t pid; 1114 sigset_t mask; 1115 char term[64], *env[2]; 1116 1117 if ((pid = fork()) == -1) { 1118 emergency("can't fork for window system on port %s: %m", 1119 sp->se_device); 1120 /* hope that getty fails and we can try again */ 1121 return; 1122 } 1123 1124 if (pid) 1125 return; 1126 1127 sigemptyset(&mask); 1128 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1129 1130 if (setsid() < 0) 1131 emergency("setsid failed (window) %m"); 1132 1133#ifdef LOGIN_CAP 1134 setprocresources(RESOURCE_WINDOW); 1135#endif 1136 if (sp->se_type) { 1137 /* Don't use malloc after fork */ 1138 strcpy(term, "TERM="); 1139 strncat(term, sp->se_type, sizeof(term) - 6); 1140 env[0] = term; 1141 env[1] = 0; 1142 } 1143 else 1144 env[0] = 0; 1145 execve(sp->se_window_argv[0], sp->se_window_argv, env); 1146 stall("can't exec window system '%s' for port %s: %m", 1147 sp->se_window_argv[0], sp->se_device); 1148 _exit(1); 1149} 1150 1151/* 1152 * Start a login session running. 1153 */ 1154pid_t 1155start_getty(sp) 1156 session_t *sp; 1157{ 1158 pid_t pid; 1159 sigset_t mask; 1160 time_t current_time = time((time_t *) 0); 1161 int too_quick = 0; 1162 char term[64], *env[2]; 1163 1164 if (current_time >= sp->se_started && 1165 current_time - sp->se_started < GETTY_SPACING) { 1166 if (++sp->se_nspace > GETTY_NSPACE) { 1167 sp->se_nspace = 0; 1168 too_quick = 1; 1169 } 1170 } else 1171 sp->se_nspace = 0; 1172 1173 /* 1174 * fork(), not vfork() -- we can't afford to block. 1175 */ 1176 if ((pid = fork()) == -1) { 1177 emergency("can't fork for getty on port %s: %m", sp->se_device); 1178 return -1; 1179 } 1180 1181 if (pid) 1182 return pid; 1183 1184 if (too_quick) { 1185 warning("getty repeating too quickly on port %s, sleeping %d secs", 1186 sp->se_device, GETTY_SLEEP); 1187 sleep((unsigned) GETTY_SLEEP); 1188 } 1189 1190 if (sp->se_window) { 1191 start_window_system(sp); 1192 sleep(WINDOW_WAIT); 1193 } 1194 1195 sigemptyset(&mask); 1196 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1197 1198#ifdef LOGIN_CAP 1199 setprocresources(RESOURCE_GETTY); 1200#endif 1201 if (sp->se_type) { 1202 /* Don't use malloc after fork */ 1203 strcpy(term, "TERM="); 1204 strncat(term, sp->se_type, sizeof(term) - 6); 1205 env[0] = term; 1206 env[1] = 0; 1207 } 1208 else 1209 env[0] = 0; 1210 execve(sp->se_getty_argv[0], sp->se_getty_argv, env); 1211 stall("can't exec getty '%s' for port %s: %m", 1212 sp->se_getty_argv[0], sp->se_device); 1213 _exit(1); 1214} 1215 1216/* 1217 * Collect exit status for a child. 1218 * If an exiting login, start a new login running. 1219 */ 1220void 1221#ifdef __STDC__ 1222collect_child(pid_t pid) 1223#else 1224collect_child(pid) 1225 pid_t pid; 1226#endif 1227{ 1228 register session_t *sp, *sprev, *snext; 1229 1230 if (! sessions) 1231 return; 1232 1233 if (! (sp = find_session(pid))) 1234 return; 1235 1236 clear_session_logs(sp); 1237 del_session(sp); 1238 sp->se_process = 0; 1239 1240 if (sp->se_flags & SE_SHUTDOWN) { 1241 if ((sprev = sp->se_prev) != NULL) 1242 sprev->se_next = sp->se_next; 1243 else 1244 sessions = sp->se_next; 1245 if ((snext = sp->se_next) != NULL) 1246 snext->se_prev = sp->se_prev; 1247 free_session(sp); 1248 return; 1249 } 1250 1251 if ((pid = start_getty(sp)) == -1) { 1252 /* serious trouble */ 1253 requested_transition = clean_ttys; 1254 return; 1255 } 1256 1257 sp->se_process = pid; 1258 sp->se_started = time((time_t *) 0); 1259 add_session(sp); 1260} 1261 1262/* 1263 * Catch a signal and request a state transition. 1264 */ 1265void 1266transition_handler(sig) 1267 int sig; 1268{ 1269 1270 switch (sig) { 1271 case SIGHUP: 1272 requested_transition = clean_ttys; 1273 break; 1274 case SIGUSR2: 1275 howto = RB_POWEROFF; 1276 case SIGUSR1: 1277 howto |= RB_HALT; 1278 case SIGINT: 1279 Reboot = TRUE; 1280 case SIGTERM: 1281 requested_transition = death; 1282 break; 1283 case SIGTSTP: 1284 requested_transition = catatonia; 1285 break; 1286 default: 1287 requested_transition = 0; 1288 break; 1289 } 1290} 1291 1292/* 1293 * Take the system multiuser. 1294 */ 1295state_func_t 1296multi_user() 1297{ 1298 pid_t pid; 1299 register session_t *sp; 1300 1301 requested_transition = 0; 1302 1303 /* 1304 * If the administrator has not set the security level to -1 1305 * to indicate that the kernel should not run multiuser in secure 1306 * mode, and the run script has not set a higher level of security 1307 * than level 1, then put the kernel into secure mode. 1308 */ 1309 if (getsecuritylevel() == 0) 1310 setsecuritylevel(1); 1311 1312 for (sp = sessions; sp; sp = sp->se_next) { 1313 if (sp->se_process) 1314 continue; 1315 if ((pid = start_getty(sp)) == -1) { 1316 /* serious trouble */ 1317 requested_transition = clean_ttys; 1318 break; 1319 } 1320 sp->se_process = pid; 1321 sp->se_started = time((time_t *) 0); 1322 add_session(sp); 1323 } 1324 1325 while (!requested_transition) 1326 if ((pid = waitpid(-1, (int *) 0, 0)) != -1) 1327 collect_child(pid); 1328 1329 return (state_func_t) requested_transition; 1330} 1331 1332/* 1333 * This is an (n*2)+(n^2) algorithm. We hope it isn't run often... 1334 */ 1335state_func_t 1336clean_ttys() 1337{ 1338 register session_t *sp, *sprev; 1339 register struct ttyent *typ; 1340 register int session_index = 0; 1341 register int devlen; 1342 char *old_getty, *old_window, *old_type; 1343 1344 if (! sessions) 1345 return (state_func_t) multi_user; 1346 1347 /* 1348 * mark all sessions for death, (!SE_PRESENT) 1349 * as we find or create new ones they'll be marked as keepers, 1350 * we'll later nuke all the ones not found in /etc/ttys 1351 */ 1352 for (sp = sessions; sp != NULL; sp = sp->se_next) 1353 sp->se_flags &= ~SE_PRESENT; 1354 1355 devlen = sizeof(_PATH_DEV) - 1; 1356 while ((typ = getttyent()) != NULL) { 1357 ++session_index; 1358 1359 for (sprev = 0, sp = sessions; sp; sprev = sp, sp = sp->se_next) 1360 if (strcmp(typ->ty_name, sp->se_device + devlen) == 0) 1361 break; 1362 1363 if (sp) { 1364 /* we want this one to live */ 1365 sp->se_flags |= SE_PRESENT; 1366 if (sp->se_index != session_index) { 1367 warning("port %s changed utmp index from %d to %d", 1368 sp->se_device, sp->se_index, 1369 session_index); 1370 sp->se_index = session_index; 1371 } 1372 if ((typ->ty_status & TTY_ON) == 0 || 1373 typ->ty_getty == 0) { 1374 sp->se_flags |= SE_SHUTDOWN; 1375 kill(sp->se_process, SIGHUP); 1376 continue; 1377 } 1378 sp->se_flags &= ~SE_SHUTDOWN; 1379 old_getty = sp->se_getty ? strdup(sp->se_getty) : 0; 1380 old_window = sp->se_window ? strdup(sp->se_window) : 0; 1381 old_type = sp->se_type ? strdup(sp->se_type) : 0; 1382 if (setupargv(sp, typ) == 0) { 1383 warning("can't parse getty for port %s", 1384 sp->se_device); 1385 sp->se_flags |= SE_SHUTDOWN; 1386 kill(sp->se_process, SIGHUP); 1387 } 1388 else if ( !old_getty 1389 || (!old_type && sp->se_type) 1390 || (old_type && !sp->se_type) 1391 || (!old_window && sp->se_window) 1392 || (old_window && !sp->se_window) 1393 || (strcmp(old_getty, sp->se_getty) != 0) 1394 || (old_window && strcmp(old_window, sp->se_window) != 0) 1395 || (old_type && strcmp(old_type, sp->se_type) != 0) 1396 ) { 1397 /* Don't set SE_SHUTDOWN here */ 1398 sp->se_nspace = 0; 1399 sp->se_started = 0; 1400 kill(sp->se_process, SIGHUP); 1401 } 1402 if (old_getty) 1403 free(old_getty); 1404 if (old_getty) 1405 free(old_window); 1406 if (old_type) 1407 free(old_type); 1408 continue; 1409 } 1410 1411 new_session(sprev, session_index, typ); 1412 } 1413 1414 endttyent(); 1415 1416 /* 1417 * sweep through and kill all deleted sessions 1418 * ones who's /etc/ttys line was deleted (SE_PRESENT unset) 1419 */ 1420 for (sp = sessions; sp != NULL; sp = sp->se_next) { 1421 if ((sp->se_flags & SE_PRESENT) == 0) { 1422 sp->se_flags |= SE_SHUTDOWN; 1423 kill(sp->se_process, SIGHUP); 1424 } 1425 } 1426 1427 return (state_func_t) multi_user; 1428} 1429 1430/* 1431 * Block further logins. 1432 */ 1433state_func_t 1434catatonia() 1435{ 1436 register session_t *sp; 1437 1438 for (sp = sessions; sp; sp = sp->se_next) 1439 sp->se_flags |= SE_SHUTDOWN; 1440 1441 return (state_func_t) multi_user; 1442} 1443 1444/* 1445 * Note SIGALRM. 1446 */ 1447void 1448alrm_handler(sig) 1449 int sig; 1450{ 1451 (void)sig; 1452 clang = 1; 1453} 1454 1455/* 1456 * Bring the system down to single user. 1457 */ 1458state_func_t 1459death() 1460{ 1461 register session_t *sp; 1462 register int i; 1463 pid_t pid; 1464 static const int death_sigs[2] = { SIGTERM, SIGKILL }; 1465 1466 /* NB: should send a message to the session logger to avoid blocking. */ 1467 logwtmp("~", "shutdown", ""); 1468 1469 for (sp = sessions; sp; sp = sp->se_next) { 1470 sp->se_flags |= SE_SHUTDOWN; 1471 kill(sp->se_process, SIGHUP); 1472 } 1473 1474 /* Try to run the rc.shutdown script within a period of time */ 1475 (void) runshutdown(); 1476 1477 for (i = 0; i < 2; ++i) { 1478 if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH) 1479 return (state_func_t) single_user; 1480 1481 clang = 0; 1482 alarm(DEATH_WATCH); 1483 do 1484 if ((pid = waitpid(-1, (int *)0, 0)) != -1) 1485 collect_child(pid); 1486 while (clang == 0 && errno != ECHILD); 1487 1488 if (errno == ECHILD) 1489 return (state_func_t) single_user; 1490 } 1491 1492 warning("some processes would not die; ps axl advised"); 1493 1494 return (state_func_t) single_user; 1495} 1496 1497/* 1498 * Run the system shutdown script. 1499 * 1500 * Exit codes: XXX I should document more 1501 * -2 shutdown script terminated abnormally 1502 * -1 fatal error - can't run script 1503 * 0 good. 1504 * >0 some error (exit code) 1505 */ 1506int 1507runshutdown() 1508{ 1509 pid_t pid, wpid; 1510 int status; 1511 int shutdowntimeout; 1512 size_t len; 1513 char *argv[4]; 1514 struct sigaction sa; 1515 struct stat sb; 1516 1517 /* 1518 * rc.shutdown is optional, so to prevent any unnecessary 1519 * complaints from the shell we simply don't run it if the 1520 * file does not exist. If the stat() here fails for other 1521 * reasons, we'll let the shell complain. 1522 */ 1523 if (stat(_PATH_RUNDOWN, &sb) == -1 && errno == ENOENT) 1524 return 0; 1525 1526 if ((pid = fork()) == 0) { 1527 int fd; 1528 1529 /* Assume that init already grab console as ctty before */ 1530 1531 sigemptyset(&sa.sa_mask); 1532 sa.sa_flags = 0; 1533 sa.sa_handler = SIG_IGN; 1534 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 1535 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 1536 1537 if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1) 1538 warning("can't open %s: %m", _PATH_CONSOLE); 1539 else { 1540 (void) dup2(fd, 0); 1541 (void) dup2(fd, 1); 1542 (void) dup2(fd, 2); 1543 if (fd > 2) 1544 close(fd); 1545 } 1546 1547 /* 1548 * Run the shutdown script. 1549 */ 1550 argv[0] = "sh"; 1551 argv[1] = _PATH_RUNDOWN; 1552 if (Reboot) 1553 argv[2] = "reboot"; 1554 else 1555 argv[2] = "single"; 1556 argv[3] = 0; 1557 1558 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 1559 1560#ifdef LOGIN_CAP 1561 setprocresources(RESOURCE_RC); 1562#endif 1563 execv(_PATH_BSHELL, argv); 1564 warning("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNDOWN); 1565 _exit(1); /* force single user mode */ 1566 } 1567 1568 if (pid == -1) { 1569 emergency("can't fork for %s on %s: %m", 1570 _PATH_BSHELL, _PATH_RUNDOWN); 1571 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 1572 continue; 1573 sleep(STALL_TIMEOUT); 1574 return -1; 1575 } 1576 1577 len = sizeof(shutdowntimeout); 1578 if (sysctlbyname("kern.shutdown_timeout", 1579 &shutdowntimeout, 1580 &len, NULL, 0) == -1 || shutdowntimeout < 2) 1581 shutdowntimeout = DEATH_SCRIPT; 1582 alarm(shutdowntimeout); 1583 clang = 0; 1584 /* 1585 * Copied from single_user(). This is a bit paranoid. 1586 * Use the same ALRM handler. 1587 */ 1588 do { 1589 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 1590 collect_child(wpid); 1591 if (clang == 1) { 1592 /* we were waiting for the sub-shell */ 1593 kill(wpid, SIGTERM); 1594 warning("timeout expired for %s on %s: %m; going to single used mode", 1595 _PATH_BSHELL, _PATH_RUNDOWN); 1596 return -1; 1597 } 1598 if (wpid == -1) { 1599 if (errno == EINTR) 1600 continue; 1601 warning("wait for %s on %s failed: %m; going to single user mode", 1602 _PATH_BSHELL, _PATH_RUNDOWN); 1603 return -1; 1604 } 1605 if (wpid == pid && WIFSTOPPED(status)) { 1606 warning("init: %s on %s stopped, restarting\n", 1607 _PATH_BSHELL, _PATH_RUNDOWN); 1608 kill(pid, SIGCONT); 1609 wpid = -1; 1610 } 1611 } while (wpid != pid && !clang); 1612 1613 /* Turn off the alarm */ 1614 alarm(0); 1615 1616 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 1617 requested_transition == catatonia) { 1618 /* 1619 * /etc/rc.shutdown executed /sbin/reboot; 1620 * wait for the end quietly 1621 */ 1622 sigset_t s; 1623 1624 sigfillset(&s); 1625 for (;;) 1626 sigsuspend(&s); 1627 } 1628 1629 if (!WIFEXITED(status)) { 1630 warning("%s on %s terminated abnormally, going to single user mode", 1631 _PATH_BSHELL, _PATH_RUNDOWN); 1632 return -2; 1633 } 1634 1635 if ((status = WEXITSTATUS(status)) != 0) 1636 warning("%s returned status %d", _PATH_RUNDOWN, status); 1637 1638 return status; 1639} 1640 1641char * 1642strk (char *p) 1643{ 1644 static char *t; 1645 char *q; 1646 int c; 1647 1648 if (p) 1649 t = p; 1650 if (!t) 1651 return 0; 1652 1653 c = *t; 1654 while (c == ' ' || c == '\t' ) 1655 c = *++t; 1656 if (!c) { 1657 t = 0; 1658 return 0; 1659 } 1660 q = t; 1661 if (c == '\'') { 1662 c = *++t; 1663 q = t; 1664 while (c && c != '\'') 1665 c = *++t; 1666 if (!c) /* unterminated string */ 1667 q = t = 0; 1668 else 1669 *t++ = 0; 1670 } else { 1671 while (c && c != ' ' && c != '\t' ) 1672 c = *++t; 1673 *t++ = 0; 1674 if (!c) 1675 t = 0; 1676 } 1677 return q; 1678} 1679 1680#ifdef LOGIN_CAP 1681void 1682setprocresources(cname) 1683 const char *cname; 1684{ 1685 login_cap_t *lc; 1686 if ((lc = login_getclassbyname(cname, NULL)) != NULL) { 1687 setusercontext(lc, (struct passwd*)NULL, 0, LOGIN_SETPRIORITY|LOGIN_SETRESOURCES); 1688 login_close(lc); 1689 } 1690} 1691#endif 1692