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 38 static 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 45 static char sccsid[] = "@(#)init.c 8.1 (Berkeley) 7/15/93"; 46 #endif 47 static const char rcsid[] = 48 "$Id: init.c,v 1.30 1998/07/06 06:56:08 charnier Exp $"; 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/types.h> 57 #include <sys/stat.h> 58 59 #include <db.h> 60 #include <errno.h> 61 #include <fcntl.h> 62 #include <libutil.h> 63 #include <signal.h> 64 #include <stdio.h> 65 #include <stdlib.h> 66 #include <string.h> 67 #include <syslog.h> 68 #include <time.h> 69 #include <ttyent.h> 70 #include <unistd.h> 71 #include <sys/reboot.h> 72 #include <err.h> 73 74 #ifdef __STDC__ 75 #include <stdarg.h> 76 #else 77 #include <varargs.h> 78 #endif 79 80 #ifdef SECURE 81 #include <pwd.h> 82 #endif 83 84 #ifdef LOGIN_CAP 85 #include <login_cap.h> 86 #endif 87 88 #include "pathnames.h" 89 90 /* 91 * Sleep times; used to prevent thrashing. 92 */ 93 #define GETTY_SPACING 5 /* N secs minimum getty spacing */ 94 #define GETTY_SLEEP 30 /* sleep N secs after spacing problem */ 95 #define GETTY_NSPACE 3 /* max. spacing count to bring reaction */ 96 #define WINDOW_WAIT 3 /* wait N secs after starting window */ 97 #define STALL_TIMEOUT 30 /* wait N secs after warning */ 98 #define DEATH_WATCH 10 /* wait N secs for procs to die */ 99 #define DEATH_SCRIPT 120 /* wait for 2min for /etc/rc.shutdown */ 100 #define RESOURCE_RC "daemon" 101 #define RESOURCE_WINDOW "default" 102 #define RESOURCE_GETTY "default" 103 104 void handle __P((sig_t, ...)); 105 void delset __P((sigset_t *, ...)); 106 107 void stall __P((char *, ...)); 108 void warning __P((char *, ...)); 109 void emergency __P((char *, ...)); 110 void disaster __P((int)); 111 void badsys __P((int)); 112 int runshutdown __P((void)); 113 114 /* 115 * We really need a recursive typedef... 116 * The following at least guarantees that the return type of (*state_t)() 117 * is sufficiently wide to hold a function pointer. 118 */ 119 typedef long (*state_func_t) __P((void)); 120 typedef state_func_t (*state_t) __P((void)); 121 122 state_func_t single_user __P((void)); 123 state_func_t runcom __P((void)); 124 state_func_t read_ttys __P((void)); 125 state_func_t multi_user __P((void)); 126 state_func_t clean_ttys __P((void)); 127 state_func_t catatonia __P((void)); 128 state_func_t death __P((void)); 129 130 enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT; 131 #define FALSE 0 132 #define TRUE 1 133 134 int Reboot = FALSE; 135 136 int devfs; 137 138 void transition __P((state_t)); 139 state_t requested_transition = runcom; 140 141 void setctty __P((char *)); 142 143 typedef 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 int se_nspace; /* spacing count */ 150 char *se_device; /* filename of port */ 151 char *se_getty; /* what to run on that port */ 152 char *se_getty_argv_space; /* pre-parsed argument array space */ 153 char **se_getty_argv; /* pre-parsed argument array */ 154 char *se_window; /* window system (started only once) */ 155 char *se_window_argv_space; /* pre-parsed argument array space */ 156 char **se_window_argv; /* pre-parsed argument array */ 157 char *se_type; /* default terminal type */ 158 struct init_session *se_prev; 159 struct init_session *se_next; 160 } session_t; 161 162 void free_session __P((session_t *)); 163 session_t *new_session __P((session_t *, int, struct ttyent *)); 164 session_t *sessions; 165 166 char **construct_argv __P((char *)); 167 void start_window_system __P((session_t *)); 168 void collect_child __P((pid_t)); 169 pid_t start_getty __P((session_t *)); 170 void transition_handler __P((int)); 171 void alrm_handler __P((int)); 172 void setsecuritylevel __P((int)); 173 int getsecuritylevel __P((void)); 174 int setupargv __P((session_t *, struct ttyent *)); 175 #ifdef LOGIN_CAP 176 void setprocresources __P((const char *)); 177 #endif 178 int clang; 179 180 void clear_session_logs __P((session_t *)); 181 182 int start_session_db __P((void)); 183 void add_session __P((session_t *)); 184 void del_session __P((session_t *)); 185 session_t *find_session __P((pid_t)); 186 DB *session_db; 187 188 /* 189 * The mother of all processes. 190 */ 191 int 192 main(argc, argv) 193 int argc; 194 char **argv; 195 { 196 int c; 197 struct sigaction sa; 198 sigset_t mask; 199 200 201 /* Dispose of random users. */ 202 if (getuid() != 0) 203 errx(1, "%s", strerror(EPERM)); 204 205 /* System V users like to reexec init. */ 206 if (getpid() != 1) 207 errx(1, "already running"); 208 209 /* 210 * Note that this does NOT open a file... 211 * Does 'init' deserve its own facility number? 212 */ 213 openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH); 214 215 /* 216 * Create an initial session. 217 */ 218 if (setsid() < 0) 219 warning("initial setsid() failed: %m"); 220 221 /* 222 * Establish an initial user so that programs running 223 * single user do not freak out and die (like passwd). 224 */ 225 if (setlogin("root") < 0) 226 warning("setlogin() failed: %m"); 227 228 /* 229 * This code assumes that we always get arguments through flags, 230 * never through bits set in some random machine register. 231 */ 232 while ((c = getopt(argc, argv, "dsf")) != -1) 233 switch (c) { 234 case 'd': 235 devfs = 1; 236 break; 237 case 's': 238 requested_transition = single_user; 239 break; 240 case 'f': 241 runcom_mode = FASTBOOT; 242 break; 243 default: 244 warning("unrecognized flag '-%c'", c); 245 break; 246 } 247 248 if (optind != argc) 249 warning("ignoring excess arguments"); 250 251 if (devfs) { 252 mount("devfs", "/dev", MNT_NOEXEC|MNT_RDONLY, 0); 253 } 254 255 /* 256 * We catch or block signals rather than ignore them, 257 * so that they get reset on exec. 258 */ 259 handle(badsys, SIGSYS, 0); 260 handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, 261 SIGBUS, SIGXCPU, SIGXFSZ, 0); 262 handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 0); 263 handle(alrm_handler, SIGALRM, 0); 264 sigfillset(&mask); 265 delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS, 266 SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 0); 267 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 268 sigemptyset(&sa.sa_mask); 269 sa.sa_flags = 0; 270 sa.sa_handler = SIG_IGN; 271 (void) sigaction(SIGTTIN, &sa, (struct sigaction *)0); 272 (void) sigaction(SIGTTOU, &sa, (struct sigaction *)0); 273 274 /* 275 * Paranoia. 276 */ 277 close(0); 278 close(1); 279 close(2); 280 281 /* 282 * Start the state machine. 283 */ 284 transition(requested_transition); 285 286 /* 287 * Should never reach here. 288 */ 289 return 1; 290 } 291 292 /* 293 * Associate a function with a signal handler. 294 */ 295 void 296 #ifdef __STDC__ 297 handle(sig_t handler, ...) 298 #else 299 handle(va_alist) 300 va_dcl 301 #endif 302 { 303 int sig; 304 struct sigaction sa; 305 sigset_t mask_everything; 306 va_list ap; 307 #ifndef __STDC__ 308 sig_t handler; 309 310 va_start(ap); 311 handler = va_arg(ap, sig_t); 312 #else 313 va_start(ap, handler); 314 #endif 315 316 sa.sa_handler = handler; 317 sigfillset(&mask_everything); 318 319 while ((sig = va_arg(ap, int)) != NULL) { 320 sa.sa_mask = mask_everything; 321 /* XXX SA_RESTART? */ 322 sa.sa_flags = sig == SIGCHLD ? SA_NOCLDSTOP : 0; 323 sigaction(sig, &sa, (struct sigaction *) 0); 324 } 325 va_end(ap); 326 } 327 328 /* 329 * Delete a set of signals from a mask. 330 */ 331 void 332 #ifdef __STDC__ 333 delset(sigset_t *maskp, ...) 334 #else 335 delset(va_alist) 336 va_dcl 337 #endif 338 { 339 int sig; 340 va_list ap; 341 #ifndef __STDC__ 342 sigset_t *maskp; 343 344 va_start(ap); 345 maskp = va_arg(ap, sigset_t *); 346 #else 347 va_start(ap, maskp); 348 #endif 349 350 while ((sig = va_arg(ap, int)) != NULL) 351 sigdelset(maskp, sig); 352 va_end(ap); 353 } 354 355 /* 356 * Log a message and sleep for a while (to give someone an opportunity 357 * to read it and to save log or hardcopy output if the problem is chronic). 358 * NB: should send a message to the session logger to avoid blocking. 359 */ 360 void 361 #ifdef __STDC__ 362 stall(char *message, ...) 363 #else 364 stall(va_alist) 365 va_dcl 366 #endif 367 { 368 va_list ap; 369 #ifndef __STDC__ 370 char *message; 371 372 va_start(ap); 373 message = va_arg(ap, char *); 374 #else 375 va_start(ap, message); 376 #endif 377 378 vsyslog(LOG_ALERT, message, ap); 379 va_end(ap); 380 sleep(STALL_TIMEOUT); 381 } 382 383 /* 384 * Like stall(), but doesn't sleep. 385 * If cpp had variadic macros, the two functions could be #defines for another. 386 * NB: should send a message to the session logger to avoid blocking. 387 */ 388 void 389 #ifdef __STDC__ 390 warning(char *message, ...) 391 #else 392 warning(va_alist) 393 va_dcl 394 #endif 395 { 396 va_list ap; 397 #ifndef __STDC__ 398 char *message; 399 400 va_start(ap); 401 message = va_arg(ap, char *); 402 #else 403 va_start(ap, message); 404 #endif 405 406 vsyslog(LOG_ALERT, message, ap); 407 va_end(ap); 408 } 409 410 /* 411 * Log an emergency message. 412 * NB: should send a message to the session logger to avoid blocking. 413 */ 414 void 415 #ifdef __STDC__ 416 emergency(char *message, ...) 417 #else 418 emergency(va_alist) 419 va_dcl 420 #endif 421 { 422 va_list ap; 423 #ifndef __STDC__ 424 char *message; 425 426 va_start(ap); 427 message = va_arg(ap, char *); 428 #else 429 va_start(ap, message); 430 #endif 431 432 vsyslog(LOG_EMERG, message, ap); 433 va_end(ap); 434 } 435 436 /* 437 * Catch a SIGSYS signal. 438 * 439 * These may arise if a system does not support sysctl. 440 * We tolerate up to 25 of these, then throw in the towel. 441 */ 442 void 443 badsys(sig) 444 int sig; 445 { 446 static int badcount = 0; 447 448 if (badcount++ < 25) 449 return; 450 disaster(sig); 451 } 452 453 /* 454 * Catch an unexpected signal. 455 */ 456 void 457 disaster(sig) 458 int sig; 459 { 460 emergency("fatal signal: %s", 461 (unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal"); 462 463 sleep(STALL_TIMEOUT); 464 _exit(sig); /* reboot */ 465 } 466 467 /* 468 * Get the security level of the kernel. 469 */ 470 int 471 getsecuritylevel() 472 { 473 #ifdef KERN_SECURELVL 474 int name[2], curlevel; 475 size_t len; 476 extern int errno; 477 478 name[0] = CTL_KERN; 479 name[1] = KERN_SECURELVL; 480 len = sizeof curlevel; 481 if (sysctl(name, 2, &curlevel, &len, NULL, 0) == -1) { 482 emergency("cannot get kernel security level: %s", 483 strerror(errno)); 484 return (-1); 485 } 486 return (curlevel); 487 #else 488 return (-1); 489 #endif 490 } 491 492 /* 493 * Set the security level of the kernel. 494 */ 495 void 496 setsecuritylevel(newlevel) 497 int newlevel; 498 { 499 #ifdef KERN_SECURELVL 500 int name[2], curlevel; 501 extern int errno; 502 503 curlevel = getsecuritylevel(); 504 if (newlevel == curlevel) 505 return; 506 name[0] = CTL_KERN; 507 name[1] = KERN_SECURELVL; 508 if (sysctl(name, 2, NULL, NULL, &newlevel, sizeof newlevel) == -1) { 509 emergency( 510 "cannot change kernel security level from %d to %d: %s", 511 curlevel, newlevel, strerror(errno)); 512 return; 513 } 514 #ifdef SECURE 515 warning("kernel security level changed from %d to %d", 516 curlevel, newlevel); 517 #endif 518 #endif 519 } 520 521 /* 522 * Change states in the finite state machine. 523 * The initial state is passed as an argument. 524 */ 525 void 526 transition(s) 527 state_t s; 528 { 529 for (;;) 530 s = (state_t) (*s)(); 531 } 532 533 /* 534 * Close out the accounting files for a login session. 535 * NB: should send a message to the session logger to avoid blocking. 536 */ 537 void 538 clear_session_logs(sp) 539 session_t *sp; 540 { 541 char *line = sp->se_device + sizeof(_PATH_DEV) - 1; 542 543 if (logout(line)) 544 logwtmp(line, "", ""); 545 } 546 547 /* 548 * Start a session and allocate a controlling terminal. 549 * Only called by children of init after forking. 550 */ 551 void 552 setctty(name) 553 char *name; 554 { 555 int fd; 556 557 (void) revoke(name); 558 if ((fd = open(name, O_RDWR)) == -1) { 559 stall("can't open %s: %m", name); 560 _exit(1); 561 } 562 if (login_tty(fd) == -1) { 563 stall("can't get %s for controlling terminal: %m", name); 564 _exit(1); 565 } 566 } 567 568 /* 569 * Bring the system up single user. 570 */ 571 state_func_t 572 single_user() 573 { 574 pid_t pid, wpid; 575 int status; 576 sigset_t mask; 577 char *shell = _PATH_BSHELL; 578 char *argv[2]; 579 #ifdef SECURE 580 struct ttyent *typ; 581 struct passwd *pp; 582 static const char banner[] = 583 "Enter root password, or ^D to go multi-user\n"; 584 char *clear, *password; 585 #endif 586 #ifdef DEBUGSHELL 587 char altshell[128]; 588 #endif 589 590 /* 591 * If the kernel is in secure mode, downgrade it to insecure mode. 592 */ 593 if (getsecuritylevel() > 0) 594 setsecuritylevel(0); 595 596 if (Reboot) { 597 /* Instead of going single user, let's halt the machine */ 598 sync(); 599 alarm(2); 600 pause(); 601 reboot(RB_AUTOBOOT); 602 _exit(0); 603 } 604 605 if ((pid = fork()) == 0) { 606 /* 607 * Start the single user session. 608 */ 609 setctty(_PATH_CONSOLE); 610 611 #ifdef SECURE 612 /* 613 * Check the root password. 614 * We don't care if the console is 'on' by default; 615 * it's the only tty that can be 'off' and 'secure'. 616 */ 617 typ = getttynam("console"); 618 pp = getpwnam("root"); 619 if (typ && (typ->ty_status & TTY_SECURE) == 0 && pp && *pp->pw_passwd) { 620 write(2, banner, sizeof banner - 1); 621 for (;;) { 622 clear = getpass("Password:"); 623 if (clear == 0 || *clear == '\0') 624 _exit(0); 625 password = crypt(clear, pp->pw_passwd); 626 bzero(clear, _PASSWORD_LEN); 627 if (strcmp(password, pp->pw_passwd) == 0) 628 break; 629 warning("single-user login failed\n"); 630 } 631 } 632 endttyent(); 633 endpwent(); 634 #endif /* SECURE */ 635 636 #ifdef DEBUGSHELL 637 { 638 char *cp = altshell; 639 int num; 640 641 #define SHREQUEST \ 642 "Enter full pathname of shell or RETURN for " _PATH_BSHELL ": " 643 (void)write(STDERR_FILENO, 644 SHREQUEST, sizeof(SHREQUEST) - 1); 645 while ((num = read(STDIN_FILENO, cp, 1)) != -1 && 646 num != 0 && *cp != '\n' && cp < &altshell[127]) 647 cp++; 648 *cp = '\0'; 649 if (altshell[0] != '\0') 650 shell = altshell; 651 } 652 #endif /* DEBUGSHELL */ 653 654 /* 655 * Unblock signals. 656 * We catch all the interesting ones, 657 * and those are reset to SIG_DFL on exec. 658 */ 659 sigemptyset(&mask); 660 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 661 662 /* 663 * Fire off a shell. 664 * If the default one doesn't work, try the Bourne shell. 665 */ 666 argv[0] = "-sh"; 667 argv[1] = 0; 668 execv(shell, argv); 669 emergency("can't exec %s for single user: %m", shell); 670 execv(_PATH_BSHELL, argv); 671 emergency("can't exec %s for single user: %m", _PATH_BSHELL); 672 sleep(STALL_TIMEOUT); 673 _exit(1); 674 } 675 676 if (pid == -1) { 677 /* 678 * We are seriously hosed. Do our best. 679 */ 680 emergency("can't fork single-user shell, trying again"); 681 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 682 continue; 683 return (state_func_t) single_user; 684 } 685 686 requested_transition = 0; 687 do { 688 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 689 collect_child(wpid); 690 if (wpid == -1) { 691 if (errno == EINTR) 692 continue; 693 warning("wait for single-user shell failed: %m; restarting"); 694 return (state_func_t) single_user; 695 } 696 if (wpid == pid && WIFSTOPPED(status)) { 697 warning("init: shell stopped, restarting\n"); 698 kill(pid, SIGCONT); 699 wpid = -1; 700 } 701 } while (wpid != pid && !requested_transition); 702 703 if (requested_transition) 704 return (state_func_t) requested_transition; 705 706 if (!WIFEXITED(status)) { 707 if (WTERMSIG(status) == SIGKILL) { 708 /* 709 * reboot(8) killed shell? 710 */ 711 warning("single user shell terminated."); 712 sleep(STALL_TIMEOUT); 713 _exit(0); 714 } else { 715 warning("single user shell terminated, restarting"); 716 return (state_func_t) single_user; 717 } 718 } 719 720 runcom_mode = FASTBOOT; 721 return (state_func_t) runcom; 722 } 723 724 /* 725 * Run the system startup script. 726 */ 727 state_func_t 728 runcom() 729 { 730 pid_t pid, wpid; 731 int status; 732 char *argv[4]; 733 struct sigaction sa; 734 735 if ((pid = fork()) == 0) { 736 sigemptyset(&sa.sa_mask); 737 sa.sa_flags = 0; 738 sa.sa_handler = SIG_IGN; 739 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 740 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 741 742 setctty(_PATH_CONSOLE); 743 744 argv[0] = "sh"; 745 argv[1] = _PATH_RUNCOM; 746 argv[2] = runcom_mode == AUTOBOOT ? "autoboot" : 0; 747 argv[3] = 0; 748 749 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 750 751 #ifdef LOGIN_CAP 752 setprocresources(RESOURCE_RC); 753 #endif 754 execv(_PATH_BSHELL, argv); 755 stall("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNCOM); 756 _exit(1); /* force single user mode */ 757 } 758 759 if (pid == -1) { 760 emergency("can't fork for %s on %s: %m", 761 _PATH_BSHELL, _PATH_RUNCOM); 762 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 763 continue; 764 sleep(STALL_TIMEOUT); 765 return (state_func_t) single_user; 766 } 767 768 /* 769 * Copied from single_user(). This is a bit paranoid. 770 */ 771 do { 772 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 773 collect_child(wpid); 774 if (wpid == -1) { 775 if (errno == EINTR) 776 continue; 777 warning("wait for %s on %s failed: %m; going to single user mode", 778 _PATH_BSHELL, _PATH_RUNCOM); 779 return (state_func_t) single_user; 780 } 781 if (wpid == pid && WIFSTOPPED(status)) { 782 warning("init: %s on %s stopped, restarting\n", 783 _PATH_BSHELL, _PATH_RUNCOM); 784 kill(pid, SIGCONT); 785 wpid = -1; 786 } 787 } while (wpid != pid); 788 789 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 790 requested_transition == catatonia) { 791 /* /etc/rc executed /sbin/reboot; wait for the end quietly */ 792 sigset_t s; 793 794 sigfillset(&s); 795 for (;;) 796 sigsuspend(&s); 797 } 798 799 if (!WIFEXITED(status)) { 800 warning("%s on %s terminated abnormally, going to single user mode", 801 _PATH_BSHELL, _PATH_RUNCOM); 802 return (state_func_t) single_user; 803 } 804 805 if (WEXITSTATUS(status)) 806 return (state_func_t) single_user; 807 808 runcom_mode = AUTOBOOT; /* the default */ 809 /* NB: should send a message to the session logger to avoid blocking. */ 810 logwtmp("~", "reboot", ""); 811 return (state_func_t) read_ttys; 812 } 813 814 /* 815 * Open the session database. 816 * 817 * NB: We could pass in the size here; is it necessary? 818 */ 819 int 820 start_session_db() 821 { 822 if (session_db && (*session_db->close)(session_db)) 823 emergency("session database close: %s", strerror(errno)); 824 if ((session_db = dbopen(NULL, O_RDWR, 0, DB_HASH, NULL)) == 0) { 825 emergency("session database open: %s", strerror(errno)); 826 return (1); 827 } 828 return (0); 829 830 } 831 832 /* 833 * Add a new login session. 834 */ 835 void 836 add_session(sp) 837 session_t *sp; 838 { 839 DBT key; 840 DBT data; 841 842 key.data = &sp->se_process; 843 key.size = sizeof sp->se_process; 844 data.data = &sp; 845 data.size = sizeof sp; 846 847 if ((*session_db->put)(session_db, &key, &data, 0)) 848 emergency("insert %d: %s", sp->se_process, strerror(errno)); 849 } 850 851 /* 852 * Delete an old login session. 853 */ 854 void 855 del_session(sp) 856 session_t *sp; 857 { 858 DBT key; 859 860 key.data = &sp->se_process; 861 key.size = sizeof sp->se_process; 862 863 if ((*session_db->del)(session_db, &key, 0)) 864 emergency("delete %d: %s", sp->se_process, strerror(errno)); 865 } 866 867 /* 868 * Look up a login session by pid. 869 */ 870 session_t * 871 #ifdef __STDC__ 872 find_session(pid_t pid) 873 #else 874 find_session(pid) 875 pid_t pid; 876 #endif 877 { 878 DBT key; 879 DBT data; 880 session_t *ret; 881 882 key.data = &pid; 883 key.size = sizeof pid; 884 if ((*session_db->get)(session_db, &key, &data, 0) != 0) 885 return 0; 886 bcopy(data.data, (char *)&ret, sizeof(ret)); 887 return ret; 888 } 889 890 /* 891 * Construct an argument vector from a command line. 892 */ 893 char ** 894 construct_argv(command) 895 char *command; 896 { 897 char *strk (char *); 898 register int argc = 0; 899 register char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1) 900 * sizeof (char *)); 901 902 if ((argv[argc++] = strk(command)) == 0) 903 return 0; 904 while ((argv[argc++] = strk((char *) 0)) != NULL) 905 continue; 906 return argv; 907 } 908 909 /* 910 * Deallocate a session descriptor. 911 */ 912 void 913 free_session(sp) 914 register session_t *sp; 915 { 916 free(sp->se_device); 917 if (sp->se_getty) { 918 free(sp->se_getty); 919 free(sp->se_getty_argv_space); 920 free(sp->se_getty_argv); 921 } 922 if (sp->se_window) { 923 free(sp->se_window); 924 free(sp->se_window_argv_space); 925 free(sp->se_window_argv); 926 } 927 if (sp->se_type) 928 free(sp->se_type); 929 free(sp); 930 } 931 932 /* 933 * Allocate a new session descriptor. 934 */ 935 session_t * 936 new_session(sprev, session_index, typ) 937 session_t *sprev; 938 int session_index; 939 register struct ttyent *typ; 940 { 941 register session_t *sp; 942 int fd; 943 944 if ((typ->ty_status & TTY_ON) == 0 || 945 typ->ty_name == 0 || 946 typ->ty_getty == 0) 947 return 0; 948 949 sp = (session_t *) calloc(1, sizeof (session_t)); 950 951 sp->se_index = session_index; 952 953 sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name)); 954 (void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name); 955 956 /* 957 * Attempt to open the device, if we get "device not configured" 958 * then don't add the device to the session list. 959 */ 960 if ((fd = open(sp->se_device, O_RDONLY | O_NONBLOCK, 0)) < 0) { 961 if (errno == ENXIO) { 962 free_session(sp); 963 return (0); 964 } 965 } else 966 close(fd); 967 968 if (setupargv(sp, typ) == 0) { 969 free_session(sp); 970 return (0); 971 } 972 973 sp->se_next = 0; 974 if (sprev == 0) { 975 sessions = sp; 976 sp->se_prev = 0; 977 } else { 978 sprev->se_next = sp; 979 sp->se_prev = sprev; 980 } 981 982 return sp; 983 } 984 985 /* 986 * Calculate getty and if useful window argv vectors. 987 */ 988 int 989 setupargv(sp, typ) 990 session_t *sp; 991 struct ttyent *typ; 992 { 993 994 if (sp->se_getty) { 995 free(sp->se_getty); 996 free(sp->se_getty_argv_space); 997 free(sp->se_getty_argv); 998 } 999 sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2); 1000 (void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name); 1001 sp->se_getty_argv_space = strdup(sp->se_getty); 1002 sp->se_getty_argv = construct_argv(sp->se_getty_argv_space); 1003 if (sp->se_getty_argv == 0) { 1004 warning("can't parse getty for port %s", sp->se_device); 1005 free(sp->se_getty); 1006 free(sp->se_getty_argv_space); 1007 sp->se_getty = sp->se_getty_argv_space = 0; 1008 return (0); 1009 } 1010 if (sp->se_window) { 1011 free(sp->se_window); 1012 free(sp->se_window_argv_space); 1013 free(sp->se_window_argv); 1014 } 1015 sp->se_window = sp->se_window_argv_space = 0; 1016 sp->se_window_argv = 0; 1017 if (typ->ty_window) { 1018 sp->se_window = strdup(typ->ty_window); 1019 sp->se_window_argv_space = strdup(sp->se_window); 1020 sp->se_window_argv = construct_argv(sp->se_window_argv_space); 1021 if (sp->se_window_argv == 0) { 1022 warning("can't parse window for port %s", 1023 sp->se_device); 1024 free(sp->se_window_argv_space); 1025 free(sp->se_window); 1026 sp->se_window = sp->se_window_argv_space = 0; 1027 return (0); 1028 } 1029 } 1030 if (sp->se_type) 1031 free(sp->se_type); 1032 sp->se_type = typ->ty_type ? strdup(typ->ty_type) : 0; 1033 return (1); 1034 } 1035 1036 /* 1037 * Walk the list of ttys and create sessions for each active line. 1038 */ 1039 state_func_t 1040 read_ttys() 1041 { 1042 int session_index = 0; 1043 register session_t *sp, *snext; 1044 register struct ttyent *typ; 1045 1046 /* 1047 * Destroy any previous session state. 1048 * There shouldn't be any, but just in case... 1049 */ 1050 for (sp = sessions; sp; sp = snext) { 1051 if (sp->se_process) 1052 clear_session_logs(sp); 1053 snext = sp->se_next; 1054 free_session(sp); 1055 } 1056 sessions = 0; 1057 if (start_session_db()) 1058 return (state_func_t) single_user; 1059 1060 /* 1061 * Allocate a session entry for each active port. 1062 * Note that sp starts at 0. 1063 */ 1064 while ((typ = getttyent()) != NULL) 1065 if ((snext = new_session(sp, ++session_index, typ)) != NULL) 1066 sp = snext; 1067 1068 endttyent(); 1069 1070 return (state_func_t) multi_user; 1071 } 1072 1073 /* 1074 * Start a window system running. 1075 */ 1076 void 1077 start_window_system(sp) 1078 session_t *sp; 1079 { 1080 pid_t pid; 1081 sigset_t mask; 1082 char term[64], *env[2]; 1083 1084 if ((pid = fork()) == -1) { 1085 emergency("can't fork for window system on port %s: %m", 1086 sp->se_device); 1087 /* hope that getty fails and we can try again */ 1088 return; 1089 } 1090 1091 if (pid) 1092 return; 1093 1094 sigemptyset(&mask); 1095 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1096 1097 if (setsid() < 0) 1098 emergency("setsid failed (window) %m"); 1099 1100 #ifdef LOGIN_CAP 1101 setprocresources(RESOURCE_WINDOW); 1102 #endif 1103 if (sp->se_type) { 1104 /* Don't use malloc after fork */ 1105 strcpy(term, "TERM="); 1106 strncat(term, sp->se_type, sizeof(term) - 6); 1107 env[0] = term; 1108 env[1] = 0; 1109 } 1110 else 1111 env[0] = 0; 1112 execve(sp->se_window_argv[0], sp->se_window_argv, env); 1113 stall("can't exec window system '%s' for port %s: %m", 1114 sp->se_window_argv[0], sp->se_device); 1115 _exit(1); 1116 } 1117 1118 /* 1119 * Start a login session running. 1120 */ 1121 pid_t 1122 start_getty(sp) 1123 session_t *sp; 1124 { 1125 pid_t pid; 1126 sigset_t mask; 1127 time_t current_time = time((time_t *) 0); 1128 int too_quick = 0; 1129 char term[64], *env[2]; 1130 1131 if (current_time >= sp->se_started && 1132 current_time - sp->se_started < GETTY_SPACING) { 1133 if (++sp->se_nspace > GETTY_NSPACE) { 1134 sp->se_nspace = 0; 1135 too_quick = 1; 1136 } 1137 } else 1138 sp->se_nspace = 0; 1139 1140 /* 1141 * fork(), not vfork() -- we can't afford to block. 1142 */ 1143 if ((pid = fork()) == -1) { 1144 emergency("can't fork for getty on port %s: %m", sp->se_device); 1145 return -1; 1146 } 1147 1148 if (pid) 1149 return pid; 1150 1151 if (too_quick) { 1152 warning("getty repeating too quickly on port %s, sleeping %d secs", 1153 sp->se_device, GETTY_SLEEP); 1154 sleep((unsigned) GETTY_SLEEP); 1155 } 1156 1157 if (sp->se_window) { 1158 start_window_system(sp); 1159 sleep(WINDOW_WAIT); 1160 } 1161 1162 sigemptyset(&mask); 1163 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1164 1165 #ifdef LOGIN_CAP 1166 setprocresources(RESOURCE_GETTY); 1167 #endif 1168 if (sp->se_type) { 1169 /* Don't use malloc after fork */ 1170 strcpy(term, "TERM="); 1171 strncat(term, sp->se_type, sizeof(term) - 6); 1172 env[0] = term; 1173 env[1] = 0; 1174 } 1175 else 1176 env[0] = 0; 1177 execve(sp->se_getty_argv[0], sp->se_getty_argv, env); 1178 stall("can't exec getty '%s' for port %s: %m", 1179 sp->se_getty_argv[0], sp->se_device); 1180 _exit(1); 1181 } 1182 1183 /* 1184 * Collect exit status for a child. 1185 * If an exiting login, start a new login running. 1186 */ 1187 void 1188 #ifdef __STDC__ 1189 collect_child(pid_t pid) 1190 #else 1191 collect_child(pid) 1192 pid_t pid; 1193 #endif 1194 { 1195 register session_t *sp, *sprev, *snext; 1196 1197 if (! sessions) 1198 return; 1199 1200 if (! (sp = find_session(pid))) 1201 return; 1202 1203 clear_session_logs(sp); 1204 del_session(sp); 1205 sp->se_process = 0; 1206 1207 if (sp->se_flags & SE_SHUTDOWN) { 1208 if ((sprev = sp->se_prev) != NULL) 1209 sprev->se_next = sp->se_next; 1210 else 1211 sessions = sp->se_next; 1212 if ((snext = sp->se_next) != NULL) 1213 snext->se_prev = sp->se_prev; 1214 free_session(sp); 1215 return; 1216 } 1217 1218 if ((pid = start_getty(sp)) == -1) { 1219 /* serious trouble */ 1220 requested_transition = clean_ttys; 1221 return; 1222 } 1223 1224 sp->se_process = pid; 1225 sp->se_started = time((time_t *) 0); 1226 add_session(sp); 1227 } 1228 1229 /* 1230 * Catch a signal and request a state transition. 1231 */ 1232 void 1233 transition_handler(sig) 1234 int sig; 1235 { 1236 1237 switch (sig) { 1238 case SIGHUP: 1239 requested_transition = clean_ttys; 1240 break; 1241 case SIGINT: 1242 Reboot = TRUE; 1243 case SIGTERM: 1244 requested_transition = death; 1245 break; 1246 case SIGTSTP: 1247 requested_transition = catatonia; 1248 break; 1249 default: 1250 requested_transition = 0; 1251 break; 1252 } 1253 } 1254 1255 /* 1256 * Take the system multiuser. 1257 */ 1258 state_func_t 1259 multi_user() 1260 { 1261 pid_t pid; 1262 register session_t *sp; 1263 1264 requested_transition = 0; 1265 1266 /* 1267 * If the administrator has not set the security level to -1 1268 * to indicate that the kernel should not run multiuser in secure 1269 * mode, and the run script has not set a higher level of security 1270 * than level 1, then put the kernel into secure mode. 1271 */ 1272 if (getsecuritylevel() == 0) 1273 setsecuritylevel(1); 1274 1275 for (sp = sessions; sp; sp = sp->se_next) { 1276 if (sp->se_process) 1277 continue; 1278 if ((pid = start_getty(sp)) == -1) { 1279 /* serious trouble */ 1280 requested_transition = clean_ttys; 1281 break; 1282 } 1283 sp->se_process = pid; 1284 sp->se_started = time((time_t *) 0); 1285 add_session(sp); 1286 } 1287 1288 while (!requested_transition) 1289 if ((pid = waitpid(-1, (int *) 0, 0)) != -1) 1290 collect_child(pid); 1291 1292 return (state_func_t) requested_transition; 1293 } 1294 1295 /* 1296 * This is an n-squared algorithm. We hope it isn't run often... 1297 */ 1298 state_func_t 1299 clean_ttys() 1300 { 1301 register session_t *sp, *sprev; 1302 register struct ttyent *typ; 1303 register int session_index = 0; 1304 register int devlen; 1305 char *old_getty, *old_window, *old_type; 1306 1307 if (! sessions) 1308 return (state_func_t) multi_user; 1309 1310 devlen = sizeof(_PATH_DEV) - 1; 1311 while ((typ = getttyent()) != NULL) { 1312 ++session_index; 1313 1314 for (sprev = 0, sp = sessions; sp; sprev = sp, sp = sp->se_next) 1315 if (strcmp(typ->ty_name, sp->se_device + devlen) == 0) 1316 break; 1317 1318 if (sp) { 1319 if (sp->se_index != session_index) { 1320 warning("port %s changed utmp index from %d to %d", 1321 sp->se_device, sp->se_index, 1322 session_index); 1323 sp->se_index = session_index; 1324 } 1325 if ((typ->ty_status & TTY_ON) == 0 || 1326 typ->ty_getty == 0) { 1327 sp->se_flags |= SE_SHUTDOWN; 1328 kill(sp->se_process, SIGHUP); 1329 continue; 1330 } 1331 sp->se_flags &= ~SE_SHUTDOWN; 1332 old_getty = sp->se_getty ? strdup(sp->se_getty) : 0; 1333 old_window = sp->se_window ? strdup(sp->se_window) : 0; 1334 old_type = sp->se_type ? strdup(sp->se_type) : 0; 1335 if (setupargv(sp, typ) == 0) { 1336 warning("can't parse getty for port %s", 1337 sp->se_device); 1338 sp->se_flags |= SE_SHUTDOWN; 1339 kill(sp->se_process, SIGHUP); 1340 } 1341 else if ( !old_getty 1342 || (!old_type && sp->se_type) 1343 || (old_type && !sp->se_type) 1344 || (!old_window && sp->se_window) 1345 || (old_window && !sp->se_window) 1346 || (strcmp(old_getty, sp->se_getty) != 0) 1347 || (old_window && strcmp(old_window, sp->se_window) != 0) 1348 || (old_type && strcmp(old_type, sp->se_type) != 0) 1349 ) { 1350 /* Don't set SE_SHUTDOWN here */ 1351 sp->se_nspace = 0; 1352 sp->se_started = 0; 1353 kill(sp->se_process, SIGHUP); 1354 } 1355 if (old_getty) 1356 free(old_getty); 1357 if (old_getty) 1358 free(old_window); 1359 if (old_type) 1360 free(old_type); 1361 continue; 1362 } 1363 1364 new_session(sprev, session_index, typ); 1365 } 1366 1367 endttyent(); 1368 1369 return (state_func_t) multi_user; 1370 } 1371 1372 /* 1373 * Block further logins. 1374 */ 1375 state_func_t 1376 catatonia() 1377 { 1378 register session_t *sp; 1379 1380 for (sp = sessions; sp; sp = sp->se_next) 1381 sp->se_flags |= SE_SHUTDOWN; 1382 1383 return (state_func_t) multi_user; 1384 } 1385 1386 /* 1387 * Note SIGALRM. 1388 */ 1389 void 1390 alrm_handler(sig) 1391 int sig; 1392 { 1393 (void)sig; 1394 clang = 1; 1395 } 1396 1397 /* 1398 * Bring the system down to single user. 1399 */ 1400 state_func_t 1401 death() 1402 { 1403 register session_t *sp; 1404 register int i; 1405 pid_t pid; 1406 static const int death_sigs[2] = { SIGTERM, SIGKILL }; 1407 1408 /* NB: should send a message to the session logger to avoid blocking. */ 1409 logwtmp("~", "shutdown", ""); 1410 1411 for (sp = sessions; sp; sp = sp->se_next) { 1412 sp->se_flags |= SE_SHUTDOWN; 1413 kill(sp->se_process, SIGHUP); 1414 } 1415 1416 /* Try to run the rc.shutdown script within a period of time */ 1417 (void) runshutdown(); 1418 1419 for (i = 0; i < 2; ++i) { 1420 if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH) 1421 return (state_func_t) single_user; 1422 1423 clang = 0; 1424 alarm(DEATH_WATCH); 1425 do 1426 if ((pid = waitpid(-1, (int *)0, 0)) != -1) 1427 collect_child(pid); 1428 while (clang == 0 && errno != ECHILD); 1429 1430 if (errno == ECHILD) 1431 return (state_func_t) single_user; 1432 } 1433 1434 warning("some processes would not die; ps axl advised"); 1435 1436 return (state_func_t) single_user; 1437 } 1438 1439 /* 1440 * Run the system shutdown script. 1441 * 1442 * Exit codes: XXX I should document more 1443 * -2 shutdown script terminated abnormally 1444 * -1 fatal error - can't run script 1445 * 0 good. 1446 * >0 some error (exit code) 1447 */ 1448 int 1449 runshutdown() 1450 { 1451 pid_t pid, wpid; 1452 int status; 1453 int shutdowntimeout; 1454 size_t len; 1455 char *argv[3]; 1456 struct sigaction sa; 1457 struct stat sb; 1458 1459 /* 1460 * rc.shutdown is optional, so to prevent any unnecessary 1461 * complaints from the shell we simply don't run it if the 1462 * file does not exist. If the stat() here fails for other 1463 * reasons, we'll let the shell complain. 1464 */ 1465 if (stat(_PATH_RUNDOWN, &sb) == -1 && errno == ENOENT) 1466 return 0; 1467 1468 if ((pid = fork()) == 0) { 1469 int fd; 1470 1471 /* Assume that init already grab console as ctty before */ 1472 1473 sigemptyset(&sa.sa_mask); 1474 sa.sa_flags = 0; 1475 sa.sa_handler = SIG_IGN; 1476 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 1477 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 1478 1479 if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1) 1480 warning("can't open %s: %m", _PATH_CONSOLE); 1481 else { 1482 (void) dup2(fd, 0); 1483 (void) dup2(fd, 1); 1484 (void) dup2(fd, 2); 1485 if (fd > 2) 1486 close(fd); 1487 } 1488 1489 /* 1490 * Run the shutdown script. 1491 */ 1492 argv[0] = "sh"; 1493 argv[1] = _PATH_RUNDOWN; 1494 argv[2] = 0; 1495 1496 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 1497 1498 #ifdef LOGIN_CAP 1499 setprocresources(RESOURCE_RC); 1500 #endif 1501 execv(_PATH_BSHELL, argv); 1502 warning("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNDOWN); 1503 _exit(1); /* force single user mode */ 1504 } 1505 1506 if (pid == -1) { 1507 emergency("can't fork for %s on %s: %m", 1508 _PATH_BSHELL, _PATH_RUNDOWN); 1509 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 1510 continue; 1511 sleep(STALL_TIMEOUT); 1512 return -1; 1513 } 1514 1515 len = sizeof(shutdowntimeout); 1516 if (sysctlbyname("kern.shutdown_timeout", 1517 &shutdowntimeout, 1518 &len, NULL, 0) == -1 || shutdowntimeout < 2) 1519 shutdowntimeout = DEATH_SCRIPT; 1520 alarm(shutdowntimeout); 1521 clang = 0; 1522 /* 1523 * Copied from single_user(). This is a bit paranoid. 1524 * Use the same ALRM handler. 1525 */ 1526 do { 1527 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 1528 collect_child(wpid); 1529 if (clang == 1) { 1530 /* we were waiting for the sub-shell */ 1531 kill(wpid, SIGTERM); 1532 warning("timeout expired for %s on %s: %m; going to single used mode", 1533 _PATH_BSHELL, _PATH_RUNDOWN); 1534 return -1; 1535 } 1536 if (wpid == -1) { 1537 if (errno == EINTR) 1538 continue; 1539 warning("wait for %s on %s failed: %m; going to single user mode", 1540 _PATH_BSHELL, _PATH_RUNDOWN); 1541 return -1; 1542 } 1543 if (wpid == pid && WIFSTOPPED(status)) { 1544 warning("init: %s on %s stopped, restarting\n", 1545 _PATH_BSHELL, _PATH_RUNDOWN); 1546 kill(pid, SIGCONT); 1547 wpid = -1; 1548 } 1549 } while (wpid != pid && !clang); 1550 1551 /* Turn off the alarm */ 1552 alarm(0); 1553 1554 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 1555 requested_transition == catatonia) { 1556 /* 1557 * /etc/rc.shutdown executed /sbin/reboot; 1558 * wait for the end quietly 1559 */ 1560 sigset_t s; 1561 1562 sigfillset(&s); 1563 for (;;) 1564 sigsuspend(&s); 1565 } 1566 1567 if (!WIFEXITED(status)) { 1568 warning("%s on %s terminated abnormally, going to single user mode", 1569 _PATH_BSHELL, _PATH_RUNDOWN); 1570 return -2; 1571 } 1572 1573 if ((status = WEXITSTATUS(status)) != 0) 1574 warning("%s returned status %d", _PATH_RUNDOWN, status); 1575 1576 return status; 1577 } 1578 1579 char * 1580 strk (char *p) 1581 { 1582 static char *t; 1583 char *q; 1584 int c; 1585 1586 if (p) 1587 t = p; 1588 if (!t) 1589 return 0; 1590 1591 c = *t; 1592 while (c == ' ' || c == '\t' ) 1593 c = *++t; 1594 if (!c) { 1595 t = 0; 1596 return 0; 1597 } 1598 q = t; 1599 if (c == '\'') { 1600 c = *++t; 1601 q = t; 1602 while (c && c != '\'') 1603 c = *++t; 1604 if (!c) /* unterminated string */ 1605 q = t = 0; 1606 else 1607 *t++ = 0; 1608 } else { 1609 while (c && c != ' ' && c != '\t' ) 1610 c = *++t; 1611 *t++ = 0; 1612 if (!c) 1613 t = 0; 1614 } 1615 return q; 1616 } 1617 1618 #ifdef LOGIN_CAP 1619 void 1620 setprocresources(cname) 1621 const char *cname; 1622 { 1623 login_cap_t *lc; 1624 if ((lc = login_getclassbyname(cname, NULL)) != NULL) { 1625 setusercontext(lc, (struct passwd*)NULL, 0, LOGIN_SETPRIORITY|LOGIN_SETRESOURCES); 1626 login_close(lc); 1627 } 1628 } 1629 #endif 1630