init.c revision 123157
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 123157 2003-12-05 04:28:03Z imp $"; 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#include <sys/uio.h> 58 59#include <db.h> 60#include <errno.h> 61#include <fcntl.h> 62#include <libutil.h> 63#include <paths.h> 64#include <signal.h> 65#include <stdio.h> 66#include <stdlib.h> 67#include <string.h> 68#include <syslog.h> 69#include <time.h> 70#include <ttyent.h> 71#include <unistd.h> 72#include <sys/reboot.h> 73#include <err.h> 74 75#include <stdarg.h> 76 77#ifdef SECURE 78#include <pwd.h> 79#endif 80 81#ifdef LOGIN_CAP 82#include <login_cap.h> 83#endif 84 85#include "pathnames.h" 86 87/* 88 * Sleep times; used to prevent thrashing. 89 */ 90#define GETTY_SPACING 5 /* N secs minimum getty spacing */ 91#define GETTY_SLEEP 30 /* sleep N secs after spacing problem */ 92#define GETTY_NSPACE 3 /* max. spacing count to bring reaction */ 93#define WINDOW_WAIT 3 /* wait N secs after starting window */ 94#define STALL_TIMEOUT 30 /* wait N secs after warning */ 95#define DEATH_WATCH 10 /* wait N secs for procs to die */ 96#define DEATH_SCRIPT 120 /* wait for 2min for /etc/rc.shutdown */ 97#define RESOURCE_RC "daemon" 98#define RESOURCE_WINDOW "default" 99#define RESOURCE_GETTY "default" 100 101void handle(sig_t, ...); 102void delset(sigset_t *, ...); 103 104void stall(const char *, ...) __printflike(1, 2); 105void warning(const char *, ...) __printflike(1, 2); 106void emergency(const char *, ...) __printflike(1, 2); 107void disaster(int); 108void badsys(int); 109int runshutdown(void); 110 111/* 112 * We really need a recursive typedef... 113 * The following at least guarantees that the return type of (*state_t)() 114 * is sufficiently wide to hold a function pointer. 115 */ 116typedef long (*state_func_t)(void); 117typedef state_func_t (*state_t)(void); 118 119state_func_t single_user(void); 120state_func_t runcom(void); 121state_func_t read_ttys(void); 122state_func_t multi_user(void); 123state_func_t clean_ttys(void); 124state_func_t catatonia(void); 125state_func_t death(void); 126 127enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT; 128#define FALSE 0 129#define TRUE 1 130 131int Reboot = FALSE; 132int howto = RB_AUTOBOOT; 133 134int devfs; 135 136void transition(state_t); 137state_t requested_transition = runcom; 138 139void setctty(char *); 140 141typedef struct init_session { 142 int se_index; /* index of entry in ttys file */ 143 pid_t se_process; /* controlling process */ 144 time_t se_started; /* used to avoid thrashing */ 145 int se_flags; /* status of session */ 146#define SE_SHUTDOWN 0x1 /* session won't be restarted */ 147#define SE_PRESENT 0x2 /* session is in /etc/ttys */ 148 int se_nspace; /* spacing count */ 149 char *se_device; /* filename of port */ 150 char *se_getty; /* what to run on that port */ 151 char *se_getty_argv_space; /* pre-parsed argument array space */ 152 char **se_getty_argv; /* pre-parsed argument array */ 153 char *se_window; /* window system (started only once) */ 154 char *se_window_argv_space; /* pre-parsed argument array space */ 155 char **se_window_argv; /* pre-parsed argument array */ 156 char *se_type; /* default terminal type */ 157 struct init_session *se_prev; 158 struct init_session *se_next; 159} session_t; 160 161void free_session(session_t *); 162session_t *new_session(session_t *, int, struct ttyent *); 163session_t *sessions; 164 165char **construct_argv(char *); 166void start_window_system(session_t *); 167void collect_child(pid_t); 168pid_t start_getty(session_t *); 169void transition_handler(int); 170void alrm_handler(int); 171void setsecuritylevel(int); 172int getsecuritylevel(void); 173int setupargv(session_t *, struct ttyent *); 174#ifdef LOGIN_CAP 175void setprocresources(const char *); 176#endif 177int clang; 178 179void clear_session_logs(session_t *); 180 181int start_session_db(void); 182void add_session(session_t *); 183void del_session(session_t *); 184session_t *find_session(pid_t); 185DB *session_db; 186 187/* 188 * The mother of all processes. 189 */ 190int 191main(int argc, char *argv[]) 192{ 193 int c; 194 struct sigaction sa; 195 sigset_t mask; 196 197 198 /* Dispose of random users. */ 199 if (getuid() != 0) 200 errx(1, "%s", strerror(EPERM)); 201 202 /* System V users like to reexec init. */ 203 if (getpid() != 1) { 204#ifdef COMPAT_SYSV_INIT 205 /* So give them what they want */ 206 if (argc > 1) { 207 if (strlen(argv[1]) == 1) { 208 char runlevel = *argv[1]; 209 int sig; 210 211 switch (runlevel) { 212 case '0': /* halt + poweroff */ 213 sig = SIGUSR2; 214 break; 215 case '1': /* single-user */ 216 sig = SIGTERM; 217 break; 218 case '6': /* reboot */ 219 sig = SIGINT; 220 break; 221 case 'c': /* block further logins */ 222 sig = SIGTSTP; 223 break; 224 case 'q': /* rescan /etc/ttys */ 225 sig = SIGHUP; 226 break; 227 default: 228 goto invalid; 229 } 230 kill(1, sig); 231 _exit(0); 232 } else 233invalid: 234 errx(1, "invalid run-level ``%s''", argv[1]); 235 } else 236#endif 237 errx(1, "already running"); 238 } 239 /* 240 * Note that this does NOT open a file... 241 * Does 'init' deserve its own facility number? 242 */ 243 openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH); 244 245 /* 246 * Create an initial session. 247 */ 248 if (setsid() < 0) 249 warning("initial setsid() failed: %m"); 250 251 /* 252 * Establish an initial user so that programs running 253 * single user do not freak out and die (like passwd). 254 */ 255 if (setlogin("root") < 0) 256 warning("setlogin() failed: %m"); 257 258 /* 259 * This code assumes that we always get arguments through flags, 260 * never through bits set in some random machine register. 261 */ 262 while ((c = getopt(argc, argv, "dsf")) != -1) 263 switch (c) { 264 case 'd': 265 devfs = 1; 266 break; 267 case 's': 268 requested_transition = single_user; 269 break; 270 case 'f': 271 runcom_mode = FASTBOOT; 272 break; 273 default: 274 warning("unrecognized flag '-%c'", c); 275 break; 276 } 277 278 if (optind != argc) 279 warning("ignoring excess arguments"); 280 281 if (devfs) { 282 struct iovec iov[4]; 283 char *s; 284 int i; 285 286 iov[0].iov_base = "fstype"; 287 iov[0].iov_len = sizeof("fstype"); 288 iov[1].iov_base = "devfs"; 289 iov[1].iov_len = sizeof("devfs"); 290 iov[2].iov_base = "fspath"; 291 iov[2].iov_len = sizeof("fspath"); 292 /* 293 * Try to avoid the trailing slash in _PATH_DEV. 294 * Be *very* defensive. 295 */ 296 s = strdup(_PATH_DEV); 297 if (s != NULL) { 298 i = strlen(s); 299 if (i > 0 && s[i - 1] == '/') 300 s[i - 1] = '\0'; 301 iov[3].iov_base = s; 302 iov[3].iov_len = strlen(s) + 1; 303 } else { 304 iov[3].iov_base = _PATH_DEV; 305 iov[3].iov_len = sizeof(_PATH_DEV); 306 } 307 nmount(iov, 4, 0); 308 if (s != NULL) 309 free(s); 310 } 311 312 /* 313 * We catch or block signals rather than ignore them, 314 * so that they get reset on exec. 315 */ 316 handle(badsys, SIGSYS, 0); 317 handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, 318 SIGBUS, SIGXCPU, SIGXFSZ, 0); 319 handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 320 SIGUSR1, SIGUSR2, 0); 321 handle(alrm_handler, SIGALRM, 0); 322 sigfillset(&mask); 323 delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS, 324 SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 325 SIGUSR1, SIGUSR2, 0); 326 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 327 sigemptyset(&sa.sa_mask); 328 sa.sa_flags = 0; 329 sa.sa_handler = SIG_IGN; 330 (void) sigaction(SIGTTIN, &sa, (struct sigaction *)0); 331 (void) sigaction(SIGTTOU, &sa, (struct sigaction *)0); 332 333 /* 334 * Paranoia. 335 */ 336 close(0); 337 close(1); 338 close(2); 339 340 /* 341 * Start the state machine. 342 */ 343 transition(requested_transition); 344 345 /* 346 * Should never reach here. 347 */ 348 return 1; 349} 350 351/* 352 * Associate a function with a signal handler. 353 */ 354void 355handle(sig_t handler, ...) 356{ 357 int sig; 358 struct sigaction sa; 359 sigset_t mask_everything; 360 va_list ap; 361 va_start(ap, handler); 362 363 sa.sa_handler = handler; 364 sigfillset(&mask_everything); 365 366 while ((sig = va_arg(ap, int)) != NULL) { 367 sa.sa_mask = mask_everything; 368 /* XXX SA_RESTART? */ 369 sa.sa_flags = sig == SIGCHLD ? SA_NOCLDSTOP : 0; 370 sigaction(sig, &sa, (struct sigaction *) 0); 371 } 372 va_end(ap); 373} 374 375/* 376 * Delete a set of signals from a mask. 377 */ 378void 379delset(sigset_t *maskp, ...) 380{ 381 int sig; 382 va_list ap; 383 va_start(ap, maskp); 384 385 while ((sig = va_arg(ap, int)) != NULL) 386 sigdelset(maskp, sig); 387 va_end(ap); 388} 389 390/* 391 * Log a message and sleep for a while (to give someone an opportunity 392 * to read it and to save log or hardcopy output if the problem is chronic). 393 * NB: should send a message to the session logger to avoid blocking. 394 */ 395void 396stall(const char *message, ...) 397{ 398 va_list ap; 399 va_start(ap, message); 400 401 vsyslog(LOG_ALERT, message, ap); 402 va_end(ap); 403 sleep(STALL_TIMEOUT); 404} 405 406/* 407 * Like stall(), but doesn't sleep. 408 * If cpp had variadic macros, the two functions could be #defines for another. 409 * NB: should send a message to the session logger to avoid blocking. 410 */ 411void 412warning(const char *message, ...) 413{ 414 va_list ap; 415 va_start(ap, message); 416 417 vsyslog(LOG_ALERT, message, ap); 418 va_end(ap); 419} 420 421/* 422 * Log an emergency message. 423 * NB: should send a message to the session logger to avoid blocking. 424 */ 425void 426emergency(const char *message, ...) 427{ 428 va_list ap; 429 va_start(ap, message); 430 431 vsyslog(LOG_EMERG, message, ap); 432 va_end(ap); 433} 434 435/* 436 * Catch a SIGSYS signal. 437 * 438 * These may arise if a system does not support sysctl. 439 * We tolerate up to 25 of these, then throw in the towel. 440 */ 441void 442badsys(int sig) 443{ 444 static int badcount = 0; 445 446 if (badcount++ < 25) 447 return; 448 disaster(sig); 449} 450 451/* 452 * Catch an unexpected signal. 453 */ 454void 455disaster(int sig) 456{ 457 emergency("fatal signal: %s", 458 (unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal"); 459 460 sleep(STALL_TIMEOUT); 461 _exit(sig); /* reboot */ 462} 463 464/* 465 * Get the security level of the kernel. 466 */ 467int 468getsecuritylevel(void) 469{ 470#ifdef KERN_SECURELVL 471 int name[2], curlevel; 472 size_t len; 473 474 name[0] = CTL_KERN; 475 name[1] = KERN_SECURELVL; 476 len = sizeof curlevel; 477 if (sysctl(name, 2, &curlevel, &len, NULL, 0) == -1) { 478 emergency("cannot get kernel security level: %s", 479 strerror(errno)); 480 return (-1); 481 } 482 return (curlevel); 483#else 484 return (-1); 485#endif 486} 487 488/* 489 * Set the security level of the kernel. 490 */ 491void 492setsecuritylevel(int newlevel) 493{ 494#ifdef KERN_SECURELVL 495 int name[2], curlevel; 496 497 curlevel = getsecuritylevel(); 498 if (newlevel == curlevel) 499 return; 500 name[0] = CTL_KERN; 501 name[1] = KERN_SECURELVL; 502 if (sysctl(name, 2, NULL, NULL, &newlevel, sizeof newlevel) == -1) { 503 emergency( 504 "cannot change kernel security level from %d to %d: %s", 505 curlevel, newlevel, strerror(errno)); 506 return; 507 } 508#ifdef SECURE 509 warning("kernel security level changed from %d to %d", 510 curlevel, newlevel); 511#endif 512#endif 513} 514 515/* 516 * Change states in the finite state machine. 517 * The initial state is passed as an argument. 518 */ 519void 520transition(state_t s) 521{ 522 for (;;) 523 s = (state_t) (*s)(); 524} 525 526/* 527 * Close out the accounting files for a login session. 528 * NB: should send a message to the session logger to avoid blocking. 529 */ 530void 531clear_session_logs(session_t *sp) 532{ 533 char *line = sp->se_device + sizeof(_PATH_DEV) - 1; 534 535 if (logout(line)) 536 logwtmp(line, "", ""); 537} 538 539/* 540 * Start a session and allocate a controlling terminal. 541 * Only called by children of init after forking. 542 */ 543void 544setctty(char *name) 545{ 546 int fd; 547 548 (void) revoke(name); 549 if ((fd = open(name, O_RDWR)) == -1) { 550 stall("can't open %s: %m", name); 551 _exit(1); 552 } 553 if (login_tty(fd) == -1) { 554 stall("can't get %s for controlling terminal: %m", name); 555 _exit(1); 556 } 557} 558 559/* 560 * Bring the system up single user. 561 */ 562state_func_t 563single_user(void) 564{ 565 pid_t pid, wpid; 566 int status; 567 sigset_t mask; 568 char *shell = _PATH_BSHELL; 569 char *argv[2]; 570#ifdef SECURE 571 struct ttyent *typ; 572 struct passwd *pp; 573 static const char banner[] = 574 "Enter root password, or ^D to go multi-user\n"; 575 char *clear, *password; 576#endif 577#ifdef DEBUGSHELL 578 char altshell[128]; 579#endif 580 581 if (Reboot) { 582 /* Instead of going single user, let's reboot the machine */ 583 sync(); 584 alarm(2); 585 pause(); 586 reboot(howto); 587 _exit(0); 588 } 589 590 if ((pid = fork()) == 0) { 591 /* 592 * Start the single user session. 593 */ 594 setctty(_PATH_CONSOLE); 595 596#ifdef SECURE 597 /* 598 * Check the root password. 599 * We don't care if the console is 'on' by default; 600 * it's the only tty that can be 'off' and 'secure'. 601 */ 602 typ = getttynam("console"); 603 pp = getpwnam("root"); 604 if (typ && (typ->ty_status & TTY_SECURE) == 0 && 605 pp && *pp->pw_passwd) { 606 write(STDERR_FILENO, banner, sizeof banner - 1); 607 for (;;) { 608 clear = getpass("Password:"); 609 if (clear == 0 || *clear == '\0') 610 _exit(0); 611 password = crypt(clear, pp->pw_passwd); 612 bzero(clear, _PASSWORD_LEN); 613 if (strcmp(password, pp->pw_passwd) == 0) 614 break; 615 warning("single-user login failed\n"); 616 } 617 } 618 endttyent(); 619 endpwent(); 620#endif /* SECURE */ 621 622#ifdef DEBUGSHELL 623 { 624 char *cp = altshell; 625 int num; 626 627#define SHREQUEST \ 628 "Enter full pathname of shell or RETURN for " _PATH_BSHELL ": " 629 (void)write(STDERR_FILENO, 630 SHREQUEST, sizeof(SHREQUEST) - 1); 631 while ((num = read(STDIN_FILENO, cp, 1)) != -1 && 632 num != 0 && *cp != '\n' && cp < &altshell[127]) 633 cp++; 634 *cp = '\0'; 635 if (altshell[0] != '\0') 636 shell = altshell; 637 } 638#endif /* DEBUGSHELL */ 639 640 /* 641 * Unblock signals. 642 * We catch all the interesting ones, 643 * and those are reset to SIG_DFL on exec. 644 */ 645 sigemptyset(&mask); 646 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 647 648 /* 649 * Fire off a shell. 650 * If the default one doesn't work, try the Bourne shell. 651 */ 652 argv[0] = "-sh"; 653 argv[1] = 0; 654 execv(shell, argv); 655 emergency("can't exec %s for single user: %m", shell); 656 execv(_PATH_BSHELL, argv); 657 emergency("can't exec %s for single user: %m", _PATH_BSHELL); 658 sleep(STALL_TIMEOUT); 659 _exit(1); 660 } 661 662 if (pid == -1) { 663 /* 664 * We are seriously hosed. Do our best. 665 */ 666 emergency("can't fork single-user shell, trying again"); 667 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 668 continue; 669 return (state_func_t) single_user; 670 } 671 672 requested_transition = 0; 673 do { 674 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 675 collect_child(wpid); 676 if (wpid == -1) { 677 if (errno == EINTR) 678 continue; 679 warning("wait for single-user shell failed: %m; restarting"); 680 return (state_func_t) single_user; 681 } 682 if (wpid == pid && WIFSTOPPED(status)) { 683 warning("init: shell stopped, restarting\n"); 684 kill(pid, SIGCONT); 685 wpid = -1; 686 } 687 } while (wpid != pid && !requested_transition); 688 689 if (requested_transition) 690 return (state_func_t) requested_transition; 691 692 if (!WIFEXITED(status)) { 693 if (WTERMSIG(status) == SIGKILL) { 694 /* 695 * reboot(8) killed shell? 696 */ 697 warning("single user shell terminated."); 698 sleep(STALL_TIMEOUT); 699 _exit(0); 700 } else { 701 warning("single user shell terminated, restarting"); 702 return (state_func_t) single_user; 703 } 704 } 705 706 runcom_mode = FASTBOOT; 707 return (state_func_t) runcom; 708} 709 710/* 711 * Run the system startup script. 712 */ 713state_func_t 714runcom(void) 715{ 716 pid_t pid, wpid; 717 int status; 718 char *argv[4]; 719 struct sigaction sa; 720 721 if ((pid = fork()) == 0) { 722 sigemptyset(&sa.sa_mask); 723 sa.sa_flags = 0; 724 sa.sa_handler = SIG_IGN; 725 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 726 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 727 728 setctty(_PATH_CONSOLE); 729 730 argv[0] = "sh"; 731 argv[1] = _PATH_RUNCOM; 732 argv[2] = runcom_mode == AUTOBOOT ? "autoboot" : 0; 733 argv[3] = 0; 734 735 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 736 737#ifdef LOGIN_CAP 738 setprocresources(RESOURCE_RC); 739#endif 740 execv(_PATH_BSHELL, argv); 741 stall("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNCOM); 742 _exit(1); /* force single user mode */ 743 } 744 745 if (pid == -1) { 746 emergency("can't fork for %s on %s: %m", 747 _PATH_BSHELL, _PATH_RUNCOM); 748 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 749 continue; 750 sleep(STALL_TIMEOUT); 751 return (state_func_t) single_user; 752 } 753 754 /* 755 * Copied from single_user(). This is a bit paranoid. 756 */ 757 requested_transition = 0; 758 do { 759 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 760 collect_child(wpid); 761 if (wpid == -1) { 762 if (requested_transition == death) 763 return (state_func_t) death; 764 if (errno == EINTR) 765 continue; 766 warning("wait for %s on %s failed: %m; going to single user mode", 767 _PATH_BSHELL, _PATH_RUNCOM); 768 return (state_func_t) single_user; 769 } 770 if (wpid == pid && WIFSTOPPED(status)) { 771 warning("init: %s on %s stopped, restarting\n", 772 _PATH_BSHELL, _PATH_RUNCOM); 773 kill(pid, SIGCONT); 774 wpid = -1; 775 } 776 } while (wpid != pid); 777 778 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 779 requested_transition == catatonia) { 780 /* /etc/rc executed /sbin/reboot; wait for the end quietly */ 781 sigset_t s; 782 783 sigfillset(&s); 784 for (;;) 785 sigsuspend(&s); 786 } 787 788 if (!WIFEXITED(status)) { 789 warning("%s on %s terminated abnormally, going to single user mode", 790 _PATH_BSHELL, _PATH_RUNCOM); 791 return (state_func_t) single_user; 792 } 793 794 if (WEXITSTATUS(status)) 795 return (state_func_t) single_user; 796 797 runcom_mode = AUTOBOOT; /* the default */ 798 /* NB: should send a message to the session logger to avoid blocking. */ 799 logwtmp("~", "reboot", ""); 800 return (state_func_t) read_ttys; 801} 802 803/* 804 * Open the session database. 805 * 806 * NB: We could pass in the size here; is it necessary? 807 */ 808int 809start_session_db(void) 810{ 811 if (session_db && (*session_db->close)(session_db)) 812 emergency("session database close: %s", strerror(errno)); 813 if ((session_db = dbopen(NULL, O_RDWR, 0, DB_HASH, NULL)) == 0) { 814 emergency("session database open: %s", strerror(errno)); 815 return (1); 816 } 817 return (0); 818 819} 820 821/* 822 * Add a new login session. 823 */ 824void 825add_session(session_t *sp) 826{ 827 DBT key; 828 DBT data; 829 830 key.data = &sp->se_process; 831 key.size = sizeof sp->se_process; 832 data.data = &sp; 833 data.size = sizeof sp; 834 835 if ((*session_db->put)(session_db, &key, &data, 0)) 836 emergency("insert %d: %s", sp->se_process, strerror(errno)); 837} 838 839/* 840 * Delete an old login session. 841 */ 842void 843del_session(session_t *sp) 844{ 845 DBT key; 846 847 key.data = &sp->se_process; 848 key.size = sizeof sp->se_process; 849 850 if ((*session_db->del)(session_db, &key, 0)) 851 emergency("delete %d: %s", sp->se_process, strerror(errno)); 852} 853 854/* 855 * Look up a login session by pid. 856 */ 857session_t * 858find_session(pid_t pid) 859{ 860 DBT key; 861 DBT data; 862 session_t *ret; 863 864 key.data = &pid; 865 key.size = sizeof pid; 866 if ((*session_db->get)(session_db, &key, &data, 0) != 0) 867 return 0; 868 bcopy(data.data, (char *)&ret, sizeof(ret)); 869 return ret; 870} 871 872/* 873 * Construct an argument vector from a command line. 874 */ 875char ** 876construct_argv(char *command) 877{ 878 char *strk (char *); 879 int argc = 0; 880 char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1) 881 * sizeof (char *)); 882 883 if ((argv[argc++] = strk(command)) == 0) { 884 free(argv); 885 return (NULL); 886 } 887 while ((argv[argc++] = strk((char *) 0)) != NULL) 888 continue; 889 return argv; 890} 891 892/* 893 * Deallocate a session descriptor. 894 */ 895void 896free_session(session_t *sp) 897{ 898 free(sp->se_device); 899 if (sp->se_getty) { 900 free(sp->se_getty); 901 free(sp->se_getty_argv_space); 902 free(sp->se_getty_argv); 903 } 904 if (sp->se_window) { 905 free(sp->se_window); 906 free(sp->se_window_argv_space); 907 free(sp->se_window_argv); 908 } 909 if (sp->se_type) 910 free(sp->se_type); 911 free(sp); 912} 913 914/* 915 * Allocate a new session descriptor. 916 * Mark it SE_PRESENT. 917 */ 918session_t * 919new_session(session_t *sprev, int session_index, struct ttyent *typ) 920{ 921 session_t *sp; 922 int fd; 923 924 if ((typ->ty_status & TTY_ON) == 0 || 925 typ->ty_name == 0 || 926 typ->ty_getty == 0) 927 return 0; 928 929 sp = (session_t *) calloc(1, sizeof (session_t)); 930 931 sp->se_index = session_index; 932 sp->se_flags |= SE_PRESENT; 933 934 sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name)); 935 (void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name); 936 937 /* 938 * Attempt to open the device, if we get "device not configured" 939 * then don't add the device to the session list. 940 */ 941 if ((fd = open(sp->se_device, O_RDONLY | O_NONBLOCK, 0)) < 0) { 942 if (errno == ENXIO || errno == ENOENT) { 943 free_session(sp); 944 return (0); 945 } 946 } else 947 close(fd); 948 949 if (setupargv(sp, typ) == 0) { 950 free_session(sp); 951 return (0); 952 } 953 954 sp->se_next = 0; 955 if (sprev == 0) { 956 sessions = sp; 957 sp->se_prev = 0; 958 } else { 959 sprev->se_next = sp; 960 sp->se_prev = sprev; 961 } 962 963 return sp; 964} 965 966/* 967 * Calculate getty and if useful window argv vectors. 968 */ 969int 970setupargv(session_t *sp, struct ttyent *typ) 971{ 972 973 if (sp->se_getty) { 974 free(sp->se_getty); 975 free(sp->se_getty_argv_space); 976 free(sp->se_getty_argv); 977 } 978 sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2); 979 (void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name); 980 sp->se_getty_argv_space = strdup(sp->se_getty); 981 sp->se_getty_argv = construct_argv(sp->se_getty_argv_space); 982 if (sp->se_getty_argv == 0) { 983 warning("can't parse getty for port %s", sp->se_device); 984 free(sp->se_getty); 985 free(sp->se_getty_argv_space); 986 sp->se_getty = sp->se_getty_argv_space = 0; 987 return (0); 988 } 989 if (sp->se_window) { 990 free(sp->se_window); 991 free(sp->se_window_argv_space); 992 free(sp->se_window_argv); 993 } 994 sp->se_window = sp->se_window_argv_space = 0; 995 sp->se_window_argv = 0; 996 if (typ->ty_window) { 997 sp->se_window = strdup(typ->ty_window); 998 sp->se_window_argv_space = strdup(sp->se_window); 999 sp->se_window_argv = construct_argv(sp->se_window_argv_space); 1000 if (sp->se_window_argv == 0) { 1001 warning("can't parse window for port %s", 1002 sp->se_device); 1003 free(sp->se_window_argv_space); 1004 free(sp->se_window); 1005 sp->se_window = sp->se_window_argv_space = 0; 1006 return (0); 1007 } 1008 } 1009 if (sp->se_type) 1010 free(sp->se_type); 1011 sp->se_type = typ->ty_type ? strdup(typ->ty_type) : 0; 1012 return (1); 1013} 1014 1015/* 1016 * Walk the list of ttys and create sessions for each active line. 1017 */ 1018state_func_t 1019read_ttys(void) 1020{ 1021 int session_index = 0; 1022 session_t *sp, *snext; 1023 struct ttyent *typ; 1024 1025 /* 1026 * Destroy any previous session state. 1027 * There shouldn't be any, but just in case... 1028 */ 1029 for (sp = sessions; sp; sp = snext) { 1030 if (sp->se_process) 1031 clear_session_logs(sp); 1032 snext = sp->se_next; 1033 free_session(sp); 1034 } 1035 sessions = 0; 1036 if (start_session_db()) 1037 return (state_func_t) single_user; 1038 1039 /* 1040 * Allocate a session entry for each active port. 1041 * Note that sp starts at 0. 1042 */ 1043 while ((typ = getttyent()) != NULL) 1044 if ((snext = new_session(sp, ++session_index, typ)) != NULL) 1045 sp = snext; 1046 1047 endttyent(); 1048 1049 return (state_func_t) multi_user; 1050} 1051 1052/* 1053 * Start a window system running. 1054 */ 1055void 1056start_window_system(session_t *sp) 1057{ 1058 pid_t pid; 1059 sigset_t mask; 1060 char term[64], *env[2]; 1061 1062 if ((pid = fork()) == -1) { 1063 emergency("can't fork for window system on port %s: %m", 1064 sp->se_device); 1065 /* hope that getty fails and we can try again */ 1066 return; 1067 } 1068 1069 if (pid) 1070 return; 1071 1072 sigemptyset(&mask); 1073 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1074 1075 if (setsid() < 0) 1076 emergency("setsid failed (window) %m"); 1077 1078#ifdef LOGIN_CAP 1079 setprocresources(RESOURCE_WINDOW); 1080#endif 1081 if (sp->se_type) { 1082 /* Don't use malloc after fork */ 1083 strcpy(term, "TERM="); 1084 strncat(term, sp->se_type, sizeof(term) - 6); 1085 env[0] = term; 1086 env[1] = 0; 1087 } 1088 else 1089 env[0] = 0; 1090 execve(sp->se_window_argv[0], sp->se_window_argv, env); 1091 stall("can't exec window system '%s' for port %s: %m", 1092 sp->se_window_argv[0], sp->se_device); 1093 _exit(1); 1094} 1095 1096/* 1097 * Start a login session running. 1098 */ 1099pid_t 1100start_getty(session_t *sp) 1101{ 1102 pid_t pid; 1103 sigset_t mask; 1104 time_t current_time = time((time_t *) 0); 1105 int too_quick = 0; 1106 char term[64], *env[2]; 1107 1108 if (current_time >= sp->se_started && 1109 current_time - sp->se_started < GETTY_SPACING) { 1110 if (++sp->se_nspace > GETTY_NSPACE) { 1111 sp->se_nspace = 0; 1112 too_quick = 1; 1113 } 1114 } else 1115 sp->se_nspace = 0; 1116 1117 /* 1118 * fork(), not vfork() -- we can't afford to block. 1119 */ 1120 if ((pid = fork()) == -1) { 1121 emergency("can't fork for getty on port %s: %m", sp->se_device); 1122 return -1; 1123 } 1124 1125 if (pid) 1126 return pid; 1127 1128 if (too_quick) { 1129 warning("getty repeating too quickly on port %s, sleeping %d secs", 1130 sp->se_device, GETTY_SLEEP); 1131 sleep((unsigned) GETTY_SLEEP); 1132 } 1133 1134 if (sp->se_window) { 1135 start_window_system(sp); 1136 sleep(WINDOW_WAIT); 1137 } 1138 1139 sigemptyset(&mask); 1140 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1141 1142#ifdef LOGIN_CAP 1143 setprocresources(RESOURCE_GETTY); 1144#endif 1145 if (sp->se_type) { 1146 /* Don't use malloc after fork */ 1147 strcpy(term, "TERM="); 1148 strncat(term, sp->se_type, sizeof(term) - 6); 1149 env[0] = term; 1150 env[1] = 0; 1151 } 1152 else 1153 env[0] = 0; 1154 execve(sp->se_getty_argv[0], sp->se_getty_argv, env); 1155 stall("can't exec getty '%s' for port %s: %m", 1156 sp->se_getty_argv[0], sp->se_device); 1157 _exit(1); 1158} 1159 1160/* 1161 * Collect exit status for a child. 1162 * If an exiting login, start a new login running. 1163 */ 1164void 1165collect_child(pid_t pid) 1166{ 1167 session_t *sp, *sprev, *snext; 1168 1169 if (! sessions) 1170 return; 1171 1172 if (! (sp = find_session(pid))) 1173 return; 1174 1175 clear_session_logs(sp); 1176 del_session(sp); 1177 sp->se_process = 0; 1178 1179 if (sp->se_flags & SE_SHUTDOWN) { 1180 if ((sprev = sp->se_prev) != NULL) 1181 sprev->se_next = sp->se_next; 1182 else 1183 sessions = sp->se_next; 1184 if ((snext = sp->se_next) != NULL) 1185 snext->se_prev = sp->se_prev; 1186 free_session(sp); 1187 return; 1188 } 1189 1190 if ((pid = start_getty(sp)) == -1) { 1191 /* serious trouble */ 1192 requested_transition = clean_ttys; 1193 return; 1194 } 1195 1196 sp->se_process = pid; 1197 sp->se_started = time((time_t *) 0); 1198 add_session(sp); 1199} 1200 1201/* 1202 * Catch a signal and request a state transition. 1203 */ 1204void 1205transition_handler(int sig) 1206{ 1207 1208 switch (sig) { 1209 case SIGHUP: 1210 requested_transition = clean_ttys; 1211 break; 1212 case SIGUSR2: 1213 howto = RB_POWEROFF; 1214 case SIGUSR1: 1215 howto |= RB_HALT; 1216 case SIGINT: 1217 Reboot = TRUE; 1218 case SIGTERM: 1219 requested_transition = death; 1220 break; 1221 case SIGTSTP: 1222 requested_transition = catatonia; 1223 break; 1224 default: 1225 requested_transition = 0; 1226 break; 1227 } 1228} 1229 1230/* 1231 * Take the system multiuser. 1232 */ 1233state_func_t 1234multi_user(void) 1235{ 1236 pid_t pid; 1237 session_t *sp; 1238 1239 requested_transition = 0; 1240 1241 /* 1242 * If the administrator has not set the security level to -1 1243 * to indicate that the kernel should not run multiuser in secure 1244 * mode, and the run script has not set a higher level of security 1245 * than level 1, then put the kernel into secure mode. 1246 */ 1247 if (getsecuritylevel() == 0) 1248 setsecuritylevel(1); 1249 1250 for (sp = sessions; sp; sp = sp->se_next) { 1251 if (sp->se_process) 1252 continue; 1253 if ((pid = start_getty(sp)) == -1) { 1254 /* serious trouble */ 1255 requested_transition = clean_ttys; 1256 break; 1257 } 1258 sp->se_process = pid; 1259 sp->se_started = time((time_t *) 0); 1260 add_session(sp); 1261 } 1262 1263 while (!requested_transition) 1264 if ((pid = waitpid(-1, (int *) 0, 0)) != -1) 1265 collect_child(pid); 1266 1267 return (state_func_t) requested_transition; 1268} 1269 1270/* 1271 * This is an (n*2)+(n^2) algorithm. We hope it isn't run often... 1272 */ 1273state_func_t 1274clean_ttys(void) 1275{ 1276 session_t *sp, *sprev; 1277 struct ttyent *typ; 1278 int session_index = 0; 1279 int devlen; 1280 char *old_getty, *old_window, *old_type; 1281 1282 /* 1283 * mark all sessions for death, (!SE_PRESENT) 1284 * as we find or create new ones they'll be marked as keepers, 1285 * we'll later nuke all the ones not found in /etc/ttys 1286 */ 1287 for (sp = sessions; sp != NULL; sp = sp->se_next) 1288 sp->se_flags &= ~SE_PRESENT; 1289 1290 devlen = sizeof(_PATH_DEV) - 1; 1291 while ((typ = getttyent()) != NULL) { 1292 ++session_index; 1293 1294 for (sprev = 0, sp = sessions; sp; sprev = sp, sp = sp->se_next) 1295 if (strcmp(typ->ty_name, sp->se_device + devlen) == 0) 1296 break; 1297 1298 if (sp) { 1299 /* we want this one to live */ 1300 sp->se_flags |= SE_PRESENT; 1301 if (sp->se_index != session_index) { 1302 warning("port %s changed utmp index from %d to %d", 1303 sp->se_device, sp->se_index, 1304 session_index); 1305 sp->se_index = session_index; 1306 } 1307 if ((typ->ty_status & TTY_ON) == 0 || 1308 typ->ty_getty == 0) { 1309 sp->se_flags |= SE_SHUTDOWN; 1310 kill(sp->se_process, SIGHUP); 1311 continue; 1312 } 1313 sp->se_flags &= ~SE_SHUTDOWN; 1314 old_getty = sp->se_getty ? strdup(sp->se_getty) : 0; 1315 old_window = sp->se_window ? strdup(sp->se_window) : 0; 1316 old_type = sp->se_type ? strdup(sp->se_type) : 0; 1317 if (setupargv(sp, typ) == 0) { 1318 warning("can't parse getty for port %s", 1319 sp->se_device); 1320 sp->se_flags |= SE_SHUTDOWN; 1321 kill(sp->se_process, SIGHUP); 1322 } 1323 else if ( !old_getty 1324 || (!old_type && sp->se_type) 1325 || (old_type && !sp->se_type) 1326 || (!old_window && sp->se_window) 1327 || (old_window && !sp->se_window) 1328 || (strcmp(old_getty, sp->se_getty) != 0) 1329 || (old_window && strcmp(old_window, sp->se_window) != 0) 1330 || (old_type && strcmp(old_type, sp->se_type) != 0) 1331 ) { 1332 /* Don't set SE_SHUTDOWN here */ 1333 sp->se_nspace = 0; 1334 sp->se_started = 0; 1335 kill(sp->se_process, SIGHUP); 1336 } 1337 if (old_getty) 1338 free(old_getty); 1339 if (old_window) 1340 free(old_window); 1341 if (old_type) 1342 free(old_type); 1343 continue; 1344 } 1345 1346 new_session(sprev, session_index, typ); 1347 } 1348 1349 endttyent(); 1350 1351 /* 1352 * sweep through and kill all deleted sessions 1353 * ones who's /etc/ttys line was deleted (SE_PRESENT unset) 1354 */ 1355 for (sp = sessions; sp != NULL; sp = sp->se_next) { 1356 if ((sp->se_flags & SE_PRESENT) == 0) { 1357 sp->se_flags |= SE_SHUTDOWN; 1358 kill(sp->se_process, SIGHUP); 1359 } 1360 } 1361 1362 return (state_func_t) multi_user; 1363} 1364 1365/* 1366 * Block further logins. 1367 */ 1368state_func_t 1369catatonia(void) 1370{ 1371 session_t *sp; 1372 1373 for (sp = sessions; sp; sp = sp->se_next) 1374 sp->se_flags |= SE_SHUTDOWN; 1375 1376 return (state_func_t) multi_user; 1377} 1378 1379/* 1380 * Note SIGALRM. 1381 */ 1382void 1383alrm_handler(int sig) 1384{ 1385 (void)sig; 1386 clang = 1; 1387} 1388 1389/* 1390 * Bring the system down to single user. 1391 */ 1392state_func_t 1393death(void) 1394{ 1395 session_t *sp; 1396 int i; 1397 pid_t pid; 1398 static const int death_sigs[2] = { SIGTERM, SIGKILL }; 1399 1400 /* NB: should send a message to the session logger to avoid blocking. */ 1401 logwtmp("~", "shutdown", ""); 1402 1403 for (sp = sessions; sp; sp = sp->se_next) { 1404 sp->se_flags |= SE_SHUTDOWN; 1405 kill(sp->se_process, SIGHUP); 1406 } 1407 1408 /* Try to run the rc.shutdown script within a period of time */ 1409 (void) runshutdown(); 1410 1411 for (i = 0; i < 2; ++i) { 1412 if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH) 1413 return (state_func_t) single_user; 1414 1415 clang = 0; 1416 alarm(DEATH_WATCH); 1417 do 1418 if ((pid = waitpid(-1, (int *)0, 0)) != -1) 1419 collect_child(pid); 1420 while (clang == 0 && errno != ECHILD); 1421 1422 if (errno == ECHILD) 1423 return (state_func_t) single_user; 1424 } 1425 1426 warning("some processes would not die; ps axl advised"); 1427 1428 return (state_func_t) single_user; 1429} 1430 1431/* 1432 * Run the system shutdown script. 1433 * 1434 * Exit codes: XXX I should document more 1435 * -2 shutdown script terminated abnormally 1436 * -1 fatal error - can't run script 1437 * 0 good. 1438 * >0 some error (exit code) 1439 */ 1440int 1441runshutdown(void) 1442{ 1443 pid_t pid, wpid; 1444 int status; 1445 int shutdowntimeout; 1446 size_t len; 1447 char *argv[4]; 1448 struct sigaction sa; 1449 struct stat sb; 1450 1451 /* 1452 * rc.shutdown is optional, so to prevent any unnecessary 1453 * complaints from the shell we simply don't run it if the 1454 * file does not exist. If the stat() here fails for other 1455 * reasons, we'll let the shell complain. 1456 */ 1457 if (stat(_PATH_RUNDOWN, &sb) == -1 && errno == ENOENT) 1458 return 0; 1459 1460 if ((pid = fork()) == 0) { 1461 int fd; 1462 1463 /* Assume that init already grab console as ctty before */ 1464 1465 sigemptyset(&sa.sa_mask); 1466 sa.sa_flags = 0; 1467 sa.sa_handler = SIG_IGN; 1468 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 1469 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 1470 1471 if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1) 1472 warning("can't open %s: %m", _PATH_CONSOLE); 1473 else { 1474 (void) dup2(fd, 0); 1475 (void) dup2(fd, 1); 1476 (void) dup2(fd, 2); 1477 if (fd > 2) 1478 close(fd); 1479 } 1480 1481 /* 1482 * Run the shutdown script. 1483 */ 1484 argv[0] = "sh"; 1485 argv[1] = _PATH_RUNDOWN; 1486 if (Reboot) 1487 argv[2] = "reboot"; 1488 else 1489 argv[2] = "single"; 1490 argv[3] = 0; 1491 1492 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 1493 1494#ifdef LOGIN_CAP 1495 setprocresources(RESOURCE_RC); 1496#endif 1497 execv(_PATH_BSHELL, argv); 1498 warning("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNDOWN); 1499 _exit(1); /* force single user mode */ 1500 } 1501 1502 if (pid == -1) { 1503 emergency("can't fork for %s on %s: %m", 1504 _PATH_BSHELL, _PATH_RUNDOWN); 1505 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 1506 continue; 1507 sleep(STALL_TIMEOUT); 1508 return -1; 1509 } 1510 1511 len = sizeof(shutdowntimeout); 1512 if (sysctlbyname("kern.shutdown_timeout", 1513 &shutdowntimeout, 1514 &len, NULL, 0) == -1 || shutdowntimeout < 2) 1515 shutdowntimeout = DEATH_SCRIPT; 1516 alarm(shutdowntimeout); 1517 clang = 0; 1518 /* 1519 * Copied from single_user(). This is a bit paranoid. 1520 * Use the same ALRM handler. 1521 */ 1522 do { 1523 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 1524 collect_child(wpid); 1525 if (clang == 1) { 1526 /* we were waiting for the sub-shell */ 1527 kill(wpid, SIGTERM); 1528 warning("timeout expired for %s on %s: %m; going to single user mode", 1529 _PATH_BSHELL, _PATH_RUNDOWN); 1530 return -1; 1531 } 1532 if (wpid == -1) { 1533 if (errno == EINTR) 1534 continue; 1535 warning("wait for %s on %s failed: %m; going to single user mode", 1536 _PATH_BSHELL, _PATH_RUNDOWN); 1537 return -1; 1538 } 1539 if (wpid == pid && WIFSTOPPED(status)) { 1540 warning("init: %s on %s stopped, restarting\n", 1541 _PATH_BSHELL, _PATH_RUNDOWN); 1542 kill(pid, SIGCONT); 1543 wpid = -1; 1544 } 1545 } while (wpid != pid && !clang); 1546 1547 /* Turn off the alarm */ 1548 alarm(0); 1549 1550 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 1551 requested_transition == catatonia) { 1552 /* 1553 * /etc/rc.shutdown executed /sbin/reboot; 1554 * wait for the end quietly 1555 */ 1556 sigset_t s; 1557 1558 sigfillset(&s); 1559 for (;;) 1560 sigsuspend(&s); 1561 } 1562 1563 if (!WIFEXITED(status)) { 1564 warning("%s on %s terminated abnormally, going to single user mode", 1565 _PATH_BSHELL, _PATH_RUNDOWN); 1566 return -2; 1567 } 1568 1569 if ((status = WEXITSTATUS(status)) != 0) 1570 warning("%s returned status %d", _PATH_RUNDOWN, status); 1571 1572 return status; 1573} 1574 1575char * 1576strk (char *p) 1577{ 1578 static char *t; 1579 char *q; 1580 int c; 1581 1582 if (p) 1583 t = p; 1584 if (!t) 1585 return 0; 1586 1587 c = *t; 1588 while (c == ' ' || c == '\t' ) 1589 c = *++t; 1590 if (!c) { 1591 t = 0; 1592 return 0; 1593 } 1594 q = t; 1595 if (c == '\'') { 1596 c = *++t; 1597 q = t; 1598 while (c && c != '\'') 1599 c = *++t; 1600 if (!c) /* unterminated string */ 1601 q = t = 0; 1602 else 1603 *t++ = 0; 1604 } else { 1605 while (c && c != ' ' && c != '\t' ) 1606 c = *++t; 1607 *t++ = 0; 1608 if (!c) 1609 t = 0; 1610 } 1611 return q; 1612} 1613 1614#ifdef LOGIN_CAP 1615void 1616setprocresources(const char *cname) 1617{ 1618 login_cap_t *lc; 1619 if ((lc = login_getclassbyname(cname, NULL)) != NULL) { 1620 setusercontext(lc, (struct passwd*)NULL, 0, LOGIN_SETPRIORITY|LOGIN_SETRESOURCES); 1621 login_close(lc); 1622 } 1623} 1624#endif 1625