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 * @(#) Copyright (c) 1991, 1993 The Regents of the University of California. All rights reserved. 37 * @(#)init.c 8.1 (Berkeley) 7/15/93 38 * $FreeBSD: src/sbin/init/init.c,v 1.38.2.8 2001/10/22 11:27:32 des Exp $ 39 * $DragonFly: src/sbin/init/init.c,v 1.4 2003/11/01 17:15:59 drhodus Exp $ 40 */ 41 42 #include <sys/param.h> 43 #include <sys/ioctl.h> 44 #include <sys/mount.h> 45 #include <sys/sysctl.h> 46 #include <sys/wait.h> 47 #include <sys/stat.h> 48 49 #include <db.h> 50 #include <errno.h> 51 #include <fcntl.h> 52 #include <libutil.h> 53 #include <paths.h> 54 #include <signal.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <syslog.h> 59 #include <time.h> 60 #include <ttyent.h> 61 #include <unistd.h> 62 #include <sys/reboot.h> 63 #include <err.h> 64 65 #ifdef __STDC__ 66 #include <stdarg.h> 67 #else 68 #include <varargs.h> 69 #endif 70 71 #ifdef SECURE 72 #include <pwd.h> 73 #endif 74 75 #ifdef LOGIN_CAP 76 #include <login_cap.h> 77 #endif 78 79 #include "pathnames.h" 80 81 /* 82 * Sleep times; used to prevent thrashing. 83 */ 84 #define GETTY_SPACING 5 /* N secs minimum getty spacing */ 85 #define GETTY_SLEEP 30 /* sleep N secs after spacing problem */ 86 #define GETTY_NSPACE 3 /* max. spacing count to bring reaction */ 87 #define WINDOW_WAIT 3 /* wait N secs after starting window */ 88 #define STALL_TIMEOUT 30 /* wait N secs after warning */ 89 #define DEATH_WATCH 10 /* wait N secs for procs to die */ 90 #define DEATH_SCRIPT 120 /* wait for 2min for /etc/rc.shutdown */ 91 #define RESOURCE_RC "daemon" 92 #define RESOURCE_WINDOW "default" 93 #define RESOURCE_GETTY "default" 94 95 void handle(sig_t, ...); 96 void delset(sigset_t *, ...); 97 98 void stall(char *, ...); 99 void warning(char *, ...); 100 void emergency(char *, ...); 101 void disaster(int); 102 void badsys(int); 103 int runshutdown(void); 104 105 /* 106 * We really need a recursive typedef... 107 * The following at least guarantees that the return type of (*state_t)() 108 * is sufficiently wide to hold a function pointer. 109 */ 110 typedef long (*state_func_t)(void); 111 typedef state_func_t (*state_t)(void); 112 113 state_func_t single_user(void); 114 state_func_t runcom(void); 115 state_func_t read_ttys(void); 116 state_func_t multi_user(void); 117 state_func_t clean_ttys(void); 118 state_func_t catatonia(void); 119 state_func_t death(void); 120 121 enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT; 122 #define FALSE 0 123 #define TRUE 1 124 125 int Reboot = FALSE; 126 int howto = RB_AUTOBOOT; 127 128 void transition(state_t); 129 state_t requested_transition = runcom; 130 131 void setctty(char *); 132 133 typedef struct init_session { 134 int se_index; /* index of entry in ttys file */ 135 pid_t se_process; /* controlling process */ 136 time_t se_started; /* used to avoid thrashing */ 137 int se_flags; /* status of session */ 138 #define SE_SHUTDOWN 0x1 /* session won't be restarted */ 139 #define SE_PRESENT 0x2 /* session is in /etc/ttys */ 140 int se_nspace; /* spacing count */ 141 char *se_device; /* filename of port */ 142 char *se_getty; /* what to run on that port */ 143 char *se_getty_argv_space; /* pre-parsed argument array space */ 144 char **se_getty_argv; /* pre-parsed argument array */ 145 char *se_window; /* window system (started only once) */ 146 char *se_window_argv_space; /* pre-parsed argument array space */ 147 char **se_window_argv; /* pre-parsed argument array */ 148 char *se_type; /* default terminal type */ 149 struct init_session *se_prev; 150 struct init_session *se_next; 151 } session_t; 152 153 void free_session(session_t *); 154 session_t *new_session(session_t *, int, struct ttyent *); 155 session_t *sessions; 156 157 char **construct_argv(char *); 158 void start_window_system(session_t *); 159 void collect_child(pid_t); 160 pid_t start_getty(session_t *); 161 void transition_handler(int); 162 void alrm_handler(int); 163 void setsecuritylevel(int); 164 int getsecuritylevel(void); 165 int setupargv(session_t *, struct ttyent *); 166 #ifdef LOGIN_CAP 167 void setprocresources(const char *); 168 #endif 169 int clang; 170 171 void clear_session_logs(session_t *); 172 173 int start_session_db(void); 174 void add_session(session_t *); 175 void del_session(session_t *); 176 session_t *find_session(pid_t); 177 DB *session_db; 178 179 /* 180 * The mother of all processes. 181 */ 182 int 183 main(int argc, char **argv) 184 { 185 int c; 186 struct sigaction sa; 187 sigset_t mask; 188 189 190 /* Dispose of random users. */ 191 if (getuid() != 0) 192 errx(1, "%s", strerror(EPERM)); 193 194 /* System V users like to reexec init. */ 195 if (getpid() != 1) { 196 #ifdef COMPAT_SYSV_INIT 197 /* So give them what they want */ 198 if (argc > 1) { 199 if (strlen(argv[1]) == 1) { 200 register char runlevel = *argv[1]; 201 register int sig; 202 203 switch (runlevel) { 204 case '0': /* halt + poweroff */ 205 sig = SIGUSR2; 206 break; 207 case '1': /* single-user */ 208 sig = SIGTERM; 209 break; 210 case '6': /* reboot */ 211 sig = SIGINT; 212 break; 213 case 'c': /* block further logins */ 214 sig = SIGTSTP; 215 break; 216 case 'q': /* rescan /etc/ttys */ 217 sig = SIGHUP; 218 break; 219 default: 220 goto invalid; 221 } 222 kill(1, sig); 223 _exit(0); 224 } else 225 invalid: 226 errx(1, "invalid run-level ``%s''", argv[1]); 227 } else 228 #endif 229 errx(1, "already running"); 230 } 231 /* 232 * Note that this does NOT open a file... 233 * Does 'init' deserve its own facility number? 234 */ 235 openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH); 236 237 /* 238 * Create an initial session. 239 */ 240 if (setsid() < 0) 241 warning("initial setsid() failed: %m"); 242 243 /* 244 * Establish an initial user so that programs running 245 * single user do not freak out and die (like passwd). 246 */ 247 if (setlogin("root") < 0) 248 warning("setlogin() failed: %m"); 249 250 /* 251 * This code assumes that we always get arguments through flags, 252 * never through bits set in some random machine register. 253 */ 254 while ((c = getopt(argc, argv, "dsf")) != -1) 255 switch (c) { 256 case 'd': 257 /* We don't support DEVFS. */ 258 break; 259 case 's': 260 requested_transition = single_user; 261 break; 262 case 'f': 263 runcom_mode = FASTBOOT; 264 break; 265 default: 266 warning("unrecognized flag '-%c'", c); 267 break; 268 } 269 270 if (optind != argc) 271 warning("ignoring excess arguments"); 272 273 /* 274 * We catch or block signals rather than ignore them, 275 * so that they get reset on exec. 276 */ 277 handle(badsys, SIGSYS, 0); 278 handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, 279 SIGBUS, SIGXCPU, SIGXFSZ, 0); 280 handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 281 SIGUSR1, SIGUSR2, 0); 282 handle(alrm_handler, SIGALRM, 0); 283 sigfillset(&mask); 284 delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS, 285 SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 286 SIGUSR1, SIGUSR2, 0); 287 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 288 sigemptyset(&sa.sa_mask); 289 sa.sa_flags = 0; 290 sa.sa_handler = SIG_IGN; 291 (void) sigaction(SIGTTIN, &sa, (struct sigaction *)0); 292 (void) sigaction(SIGTTOU, &sa, (struct sigaction *)0); 293 294 /* 295 * Paranoia. 296 */ 297 close(0); 298 close(1); 299 close(2); 300 301 /* 302 * Start the state machine. 303 */ 304 transition(requested_transition); 305 306 /* 307 * Should never reach here. 308 */ 309 return 1; 310 } 311 312 /* 313 * Associate a function with a signal handler. 314 */ 315 void 316 handle(sig_t handler, ...) 317 { 318 int sig; 319 struct sigaction sa; 320 sigset_t mask_everything; 321 va_list ap; 322 323 va_start(ap, handler); 324 325 sa.sa_handler = handler; 326 sigfillset(&mask_everything); 327 328 while ((sig = va_arg(ap, int)) != NULL) { 329 sa.sa_mask = mask_everything; 330 /* XXX SA_RESTART? */ 331 sa.sa_flags = sig == SIGCHLD ? SA_NOCLDSTOP : 0; 332 sigaction(sig, &sa, (struct sigaction *) 0); 333 } 334 va_end(ap); 335 } 336 337 /* 338 * Delete a set of signals from a mask. 339 */ 340 void 341 delset(sigset_t *maskp, ...) 342 { 343 int sig; 344 va_list ap; 345 346 va_start(ap, maskp); 347 348 while ((sig = va_arg(ap, int)) != NULL) 349 sigdelset(maskp, sig); 350 va_end(ap); 351 } 352 353 /* 354 * Log a message and sleep for a while (to give someone an opportunity 355 * to read it and to save log or hardcopy output if the problem is chronic). 356 * NB: should send a message to the session logger to avoid blocking. 357 */ 358 void 359 stall(char *message, ...) 360 { 361 va_list ap; 362 363 va_start(ap, message); 364 365 vsyslog(LOG_ALERT, message, ap); 366 va_end(ap); 367 sleep(STALL_TIMEOUT); 368 } 369 370 /* 371 * Like stall(), but doesn't sleep. 372 * If cpp had variadic macros, the two functions could be #defines for another. 373 * NB: should send a message to the session logger to avoid blocking. 374 */ 375 void 376 warning(char *message, ...) 377 { 378 va_list ap; 379 380 va_start(ap, message); 381 382 vsyslog(LOG_ALERT, message, ap); 383 va_end(ap); 384 } 385 386 /* 387 * Log an emergency message. 388 * NB: should send a message to the session logger to avoid blocking. 389 */ 390 void 391 emergency(char *message, ...) 392 { 393 va_list ap; 394 395 va_start(ap, message); 396 397 vsyslog(LOG_EMERG, message, ap); 398 va_end(ap); 399 } 400 401 /* 402 * Catch a SIGSYS signal. 403 * 404 * These may arise if a system does not support sysctl. 405 * We tolerate up to 25 of these, then throw in the towel. 406 */ 407 void 408 badsys(int sig) 409 { 410 static int badcount = 0; 411 412 if (badcount++ < 25) 413 return; 414 disaster(sig); 415 } 416 417 /* 418 * Catch an unexpected signal. 419 */ 420 void 421 disaster(int sig) 422 { 423 emergency("fatal signal: %s", 424 (unsigned)sig < NSIG ? sys_siglist[sig] : "unknown signal"); 425 426 sleep(STALL_TIMEOUT); 427 _exit(sig); /* reboot */ 428 } 429 430 /* 431 * Get the security level of the kernel. 432 */ 433 int 434 getsecuritylevel(void) 435 { 436 #ifdef KERN_SECURELVL 437 int name[2], curlevel; 438 size_t len; 439 440 name[0] = CTL_KERN; 441 name[1] = KERN_SECURELVL; 442 len = sizeof curlevel; 443 if (sysctl(name, 2, &curlevel, &len, NULL, 0) == -1) { 444 emergency("cannot get kernel security level: %s", 445 strerror(errno)); 446 return (-1); 447 } 448 return (curlevel); 449 #else 450 return (-1); 451 #endif 452 } 453 454 /* 455 * Set the security level of the kernel. 456 */ 457 void 458 setsecuritylevel(int newlevel) 459 { 460 #ifdef KERN_SECURELVL 461 int name[2], curlevel; 462 463 curlevel = getsecuritylevel(); 464 if (newlevel == curlevel) 465 return; 466 name[0] = CTL_KERN; 467 name[1] = KERN_SECURELVL; 468 if (sysctl(name, 2, NULL, NULL, &newlevel, sizeof newlevel) == -1) { 469 emergency( 470 "cannot change kernel security level from %d to %d: %s", 471 curlevel, newlevel, strerror(errno)); 472 return; 473 } 474 #ifdef SECURE 475 warning("kernel security level changed from %d to %d", 476 curlevel, newlevel); 477 #endif 478 #endif 479 } 480 481 /* 482 * Change states in the finite state machine. 483 * The initial state is passed as an argument. 484 */ 485 void 486 transition(state_t s) 487 { 488 for (;;) 489 s = (state_t) (*s)(); 490 } 491 492 /* 493 * Close out the accounting files for a login session. 494 * NB: should send a message to the session logger to avoid blocking. 495 */ 496 void 497 clear_session_logs(session_t *sp) 498 { 499 char *line = sp->se_device + sizeof(_PATH_DEV) - 1; 500 501 if (logout(line)) 502 logwtmp(line, "", ""); 503 } 504 505 /* 506 * Start a session and allocate a controlling terminal. 507 * Only called by children of init after forking. 508 */ 509 void 510 setctty(char *name) 511 { 512 int fd; 513 514 (void) revoke(name); 515 if ((fd = open(name, O_RDWR)) == -1) { 516 stall("can't open %s: %m", name); 517 _exit(1); 518 } 519 if (login_tty(fd) == -1) { 520 stall("can't get %s for controlling terminal: %m", name); 521 _exit(1); 522 } 523 } 524 525 /* 526 * Bring the system up single user. 527 */ 528 state_func_t 529 single_user(void) 530 { 531 pid_t pid, wpid; 532 int status; 533 sigset_t mask; 534 char *shell = _PATH_BSHELL; 535 char *argv[2]; 536 #ifdef SECURE 537 struct ttyent *typ; 538 struct passwd *pp; 539 static const char banner[] = 540 "Enter root password, or ^D to go multi-user\n"; 541 char *clear, *password; 542 #endif 543 #ifdef DEBUGSHELL 544 char altshell[128]; 545 #endif 546 547 if (Reboot) { 548 /* Instead of going single user, let's reboot the machine */ 549 sync(); 550 alarm(2); 551 pause(); 552 reboot(howto); 553 _exit(0); 554 } 555 556 if ((pid = fork()) == 0) { 557 /* 558 * Start the single user session. 559 */ 560 setctty(_PATH_CONSOLE); 561 562 #ifdef SECURE 563 /* 564 * Check the root password. 565 * We don't care if the console is 'on' by default; 566 * it's the only tty that can be 'off' and 'secure'. 567 */ 568 typ = getttynam("console"); 569 pp = getpwnam("root"); 570 if (typ && (typ->ty_status & TTY_SECURE) == 0 && 571 pp && *pp->pw_passwd) { 572 write(2, banner, sizeof banner - 1); 573 for (;;) { 574 clear = getpass("Password:"); 575 if (clear == 0 || *clear == '\0') 576 _exit(0); 577 password = crypt(clear, pp->pw_passwd); 578 bzero(clear, _PASSWORD_LEN); 579 if (strcmp(password, pp->pw_passwd) == 0) 580 break; 581 warning("single-user login failed\n"); 582 } 583 } 584 endttyent(); 585 endpwent(); 586 #endif /* SECURE */ 587 588 #ifdef DEBUGSHELL 589 { 590 char *cp = altshell; 591 int num; 592 593 #define SHREQUEST \ 594 "Enter full pathname of shell or RETURN for " _PATH_BSHELL ": " 595 (void)write(STDERR_FILENO, 596 SHREQUEST, sizeof(SHREQUEST) - 1); 597 while ((num = read(STDIN_FILENO, cp, 1)) != -1 && 598 num != 0 && *cp != '\n' && cp < &altshell[127]) 599 cp++; 600 *cp = '\0'; 601 if (altshell[0] != '\0') 602 shell = altshell; 603 } 604 #endif /* DEBUGSHELL */ 605 606 /* 607 * Unblock signals. 608 * We catch all the interesting ones, 609 * and those are reset to SIG_DFL on exec. 610 */ 611 sigemptyset(&mask); 612 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 613 614 /* 615 * Fire off a shell. 616 * If the default one doesn't work, try the Bourne shell. 617 */ 618 argv[0] = "-sh"; 619 argv[1] = 0; 620 execv(shell, argv); 621 emergency("can't exec %s for single user: %m", shell); 622 execv(_PATH_BSHELL, argv); 623 emergency("can't exec %s for single user: %m", _PATH_BSHELL); 624 sleep(STALL_TIMEOUT); 625 _exit(1); 626 } 627 628 if (pid == -1) { 629 /* 630 * We are seriously hosed. Do our best. 631 */ 632 emergency("can't fork single-user shell, trying again"); 633 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 634 continue; 635 return (state_func_t) single_user; 636 } 637 638 requested_transition = 0; 639 do { 640 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 641 collect_child(wpid); 642 if (wpid == -1) { 643 if (errno == EINTR) 644 continue; 645 warning("wait for single-user shell failed: %m; restarting"); 646 return (state_func_t) single_user; 647 } 648 if (wpid == pid && WIFSTOPPED(status)) { 649 warning("init: shell stopped, restarting\n"); 650 kill(pid, SIGCONT); 651 wpid = -1; 652 } 653 } while (wpid != pid && !requested_transition); 654 655 if (requested_transition) 656 return (state_func_t) requested_transition; 657 658 if (!WIFEXITED(status)) { 659 if (WTERMSIG(status) == SIGKILL) { 660 /* 661 * reboot(8) killed shell? 662 */ 663 warning("single user shell terminated."); 664 sleep(STALL_TIMEOUT); 665 _exit(0); 666 } else { 667 warning("single user shell terminated, restarting"); 668 return (state_func_t) single_user; 669 } 670 } 671 672 runcom_mode = FASTBOOT; 673 return (state_func_t) runcom; 674 } 675 676 /* 677 * Run the system startup script. 678 */ 679 state_func_t 680 runcom(void) 681 { 682 pid_t pid, wpid; 683 int status; 684 char *argv[4]; 685 struct sigaction sa; 686 687 if ((pid = fork()) == 0) { 688 sigemptyset(&sa.sa_mask); 689 sa.sa_flags = 0; 690 sa.sa_handler = SIG_IGN; 691 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 692 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 693 694 setctty(_PATH_CONSOLE); 695 696 argv[0] = "sh"; 697 argv[1] = _PATH_RUNCOM; 698 argv[2] = runcom_mode == AUTOBOOT ? "autoboot" : 0; 699 argv[3] = 0; 700 701 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 702 703 #ifdef LOGIN_CAP 704 setprocresources(RESOURCE_RC); 705 #endif 706 execv(_PATH_BSHELL, argv); 707 stall("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNCOM); 708 _exit(1); /* force single user mode */ 709 } 710 711 if (pid == -1) { 712 emergency("can't fork for %s on %s: %m", 713 _PATH_BSHELL, _PATH_RUNCOM); 714 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 715 continue; 716 sleep(STALL_TIMEOUT); 717 return (state_func_t) single_user; 718 } 719 720 /* 721 * Copied from single_user(). This is a bit paranoid. 722 */ 723 requested_transition = 0; 724 do { 725 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 726 collect_child(wpid); 727 if (wpid == -1) { 728 if (requested_transition == death) 729 return (state_func_t) death; 730 if (errno == EINTR) 731 continue; 732 warning("wait for %s on %s failed: %m; going to single user mode", 733 _PATH_BSHELL, _PATH_RUNCOM); 734 return (state_func_t) single_user; 735 } 736 if (wpid == pid && WIFSTOPPED(status)) { 737 warning("init: %s on %s stopped, restarting\n", 738 _PATH_BSHELL, _PATH_RUNCOM); 739 kill(pid, SIGCONT); 740 wpid = -1; 741 } 742 } while (wpid != pid); 743 744 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 745 requested_transition == catatonia) { 746 /* /etc/rc executed /sbin/reboot; wait for the end quietly */ 747 sigset_t s; 748 749 sigfillset(&s); 750 for (;;) 751 sigsuspend(&s); 752 } 753 754 if (!WIFEXITED(status)) { 755 warning("%s on %s terminated abnormally, going to single user mode", 756 _PATH_BSHELL, _PATH_RUNCOM); 757 return (state_func_t) single_user; 758 } 759 760 if (WEXITSTATUS(status)) 761 return (state_func_t) single_user; 762 763 runcom_mode = AUTOBOOT; /* the default */ 764 /* NB: should send a message to the session logger to avoid blocking. */ 765 logwtmp("~", "reboot", ""); 766 return (state_func_t) read_ttys; 767 } 768 769 /* 770 * Open the session database. 771 * 772 * NB: We could pass in the size here; is it necessary? 773 */ 774 int 775 start_session_db(void) 776 { 777 if (session_db && (*session_db->close)(session_db)) 778 emergency("session database close: %s", strerror(errno)); 779 if ((session_db = dbopen(NULL, O_RDWR, 0, DB_HASH, NULL)) == 0) { 780 emergency("session database open: %s", strerror(errno)); 781 return (1); 782 } 783 return (0); 784 785 } 786 787 /* 788 * Add a new login session. 789 */ 790 void 791 add_session(session_t *sp) 792 { 793 DBT key; 794 DBT data; 795 796 key.data = &sp->se_process; 797 key.size = sizeof sp->se_process; 798 data.data = &sp; 799 data.size = sizeof sp; 800 801 if ((*session_db->put)(session_db, &key, &data, 0)) 802 emergency("insert %d: %s", sp->se_process, strerror(errno)); 803 } 804 805 /* 806 * Delete an old login session. 807 */ 808 void 809 del_session(session_t *sp) 810 { 811 DBT key; 812 813 key.data = &sp->se_process; 814 key.size = sizeof sp->se_process; 815 816 if ((*session_db->del)(session_db, &key, 0)) 817 emergency("delete %d: %s", sp->se_process, strerror(errno)); 818 } 819 820 /* 821 * Look up a login session by pid. 822 */ 823 session_t * 824 find_session(pid_t pid) 825 { 826 DBT key; 827 DBT data; 828 session_t *ret; 829 830 key.data = &pid; 831 key.size = sizeof pid; 832 if ((*session_db->get)(session_db, &key, &data, 0) != 0) 833 return 0; 834 bcopy(data.data, (char *)&ret, sizeof(ret)); 835 return ret; 836 } 837 838 /* 839 * Construct an argument vector from a command line. 840 */ 841 char ** 842 construct_argv(char *command) 843 { 844 char *strk (char *); 845 register int argc = 0; 846 register char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1) 847 * sizeof (char *)); 848 849 if ((argv[argc++] = strk(command)) == 0) { 850 free(argv); 851 return (NULL); 852 } 853 while ((argv[argc++] = strk((char *) 0)) != NULL) 854 continue; 855 return argv; 856 } 857 858 /* 859 * Deallocate a session descriptor. 860 */ 861 void 862 free_session(register session_t *sp) 863 { 864 free(sp->se_device); 865 if (sp->se_getty) { 866 free(sp->se_getty); 867 free(sp->se_getty_argv_space); 868 free(sp->se_getty_argv); 869 } 870 if (sp->se_window) { 871 free(sp->se_window); 872 free(sp->se_window_argv_space); 873 free(sp->se_window_argv); 874 } 875 if (sp->se_type) 876 free(sp->se_type); 877 free(sp); 878 } 879 880 /* 881 * Allocate a new session descriptor. 882 * Mark it SE_PRESENT. 883 */ 884 session_t * 885 new_session(session_t *sprev, int session_index, register struct ttyent *typ) 886 { 887 register session_t *sp; 888 int fd; 889 890 if ((typ->ty_status & TTY_ON) == 0 || 891 typ->ty_name == 0 || 892 typ->ty_getty == 0) 893 return 0; 894 895 sp = (session_t *) calloc(1, sizeof (session_t)); 896 897 sp->se_index = session_index; 898 sp->se_flags |= SE_PRESENT; 899 900 sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name)); 901 (void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name); 902 903 /* 904 * Attempt to open the device, if we get "device not configured" 905 * then don't add the device to the session list. 906 */ 907 if ((fd = open(sp->se_device, O_RDONLY | O_NONBLOCK, 0)) < 0) { 908 if (errno == ENXIO) { 909 free_session(sp); 910 return (0); 911 } 912 } else 913 close(fd); 914 915 if (setupargv(sp, typ) == 0) { 916 free_session(sp); 917 return (0); 918 } 919 920 sp->se_next = 0; 921 if (sprev == 0) { 922 sessions = sp; 923 sp->se_prev = 0; 924 } else { 925 sprev->se_next = sp; 926 sp->se_prev = sprev; 927 } 928 929 return sp; 930 } 931 932 /* 933 * Calculate getty and if useful window argv vectors. 934 */ 935 int 936 setupargv(session_t *sp, struct ttyent *typ) 937 { 938 939 if (sp->se_getty) { 940 free(sp->se_getty); 941 free(sp->se_getty_argv_space); 942 free(sp->se_getty_argv); 943 } 944 sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2); 945 (void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name); 946 sp->se_getty_argv_space = strdup(sp->se_getty); 947 sp->se_getty_argv = construct_argv(sp->se_getty_argv_space); 948 if (sp->se_getty_argv == 0) { 949 warning("can't parse getty for port %s", sp->se_device); 950 free(sp->se_getty); 951 free(sp->se_getty_argv_space); 952 sp->se_getty = sp->se_getty_argv_space = 0; 953 return (0); 954 } 955 if (sp->se_window) { 956 free(sp->se_window); 957 free(sp->se_window_argv_space); 958 free(sp->se_window_argv); 959 } 960 sp->se_window = sp->se_window_argv_space = 0; 961 sp->se_window_argv = 0; 962 if (typ->ty_window) { 963 sp->se_window = strdup(typ->ty_window); 964 sp->se_window_argv_space = strdup(sp->se_window); 965 sp->se_window_argv = construct_argv(sp->se_window_argv_space); 966 if (sp->se_window_argv == 0) { 967 warning("can't parse window for port %s", 968 sp->se_device); 969 free(sp->se_window_argv_space); 970 free(sp->se_window); 971 sp->se_window = sp->se_window_argv_space = 0; 972 return (0); 973 } 974 } 975 if (sp->se_type) 976 free(sp->se_type); 977 sp->se_type = typ->ty_type ? strdup(typ->ty_type) : 0; 978 return (1); 979 } 980 981 /* 982 * Walk the list of ttys and create sessions for each active line. 983 */ 984 state_func_t 985 read_ttys(void) 986 { 987 int session_index = 0; 988 register session_t *sp, *snext; 989 register struct ttyent *typ; 990 991 /* 992 * Destroy any previous session state. 993 * There shouldn't be any, but just in case... 994 */ 995 for (sp = sessions; sp; sp = snext) { 996 if (sp->se_process) 997 clear_session_logs(sp); 998 snext = sp->se_next; 999 free_session(sp); 1000 } 1001 sessions = 0; 1002 if (start_session_db()) 1003 return (state_func_t) single_user; 1004 1005 /* 1006 * Allocate a session entry for each active port. 1007 * Note that sp starts at 0. 1008 */ 1009 while ((typ = getttyent()) != NULL) 1010 if ((snext = new_session(sp, ++session_index, typ)) != NULL) 1011 sp = snext; 1012 1013 endttyent(); 1014 1015 return (state_func_t) multi_user; 1016 } 1017 1018 /* 1019 * Start a window system running. 1020 */ 1021 void 1022 start_window_system(session_t *sp) 1023 { 1024 pid_t pid; 1025 sigset_t mask; 1026 char term[64], *env[2]; 1027 1028 if ((pid = fork()) == -1) { 1029 emergency("can't fork for window system on port %s: %m", 1030 sp->se_device); 1031 /* hope that getty fails and we can try again */ 1032 return; 1033 } 1034 1035 if (pid) 1036 return; 1037 1038 sigemptyset(&mask); 1039 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1040 1041 if (setsid() < 0) 1042 emergency("setsid failed (window) %m"); 1043 1044 #ifdef LOGIN_CAP 1045 setprocresources(RESOURCE_WINDOW); 1046 #endif 1047 if (sp->se_type) { 1048 /* Don't use malloc after fork */ 1049 strcpy(term, "TERM="); 1050 strncat(term, sp->se_type, sizeof(term) - 6); 1051 env[0] = term; 1052 env[1] = 0; 1053 } 1054 else 1055 env[0] = 0; 1056 execve(sp->se_window_argv[0], sp->se_window_argv, env); 1057 stall("can't exec window system '%s' for port %s: %m", 1058 sp->se_window_argv[0], sp->se_device); 1059 _exit(1); 1060 } 1061 1062 /* 1063 * Start a login session running. 1064 */ 1065 pid_t 1066 start_getty(session_t *sp) 1067 { 1068 pid_t pid; 1069 sigset_t mask; 1070 time_t current_time = time((time_t *) 0); 1071 int too_quick = 0; 1072 char term[64], *env[2]; 1073 1074 if (current_time >= sp->se_started && 1075 current_time - sp->se_started < GETTY_SPACING) { 1076 if (++sp->se_nspace > GETTY_NSPACE) { 1077 sp->se_nspace = 0; 1078 too_quick = 1; 1079 } 1080 } else 1081 sp->se_nspace = 0; 1082 1083 /* 1084 * fork(), not vfork() -- we can't afford to block. 1085 */ 1086 if ((pid = fork()) == -1) { 1087 emergency("can't fork for getty on port %s: %m", sp->se_device); 1088 return -1; 1089 } 1090 1091 if (pid) 1092 return pid; 1093 1094 if (too_quick) { 1095 warning("getty repeating too quickly on port %s, sleeping %d secs", 1096 sp->se_device, GETTY_SLEEP); 1097 sleep((unsigned) GETTY_SLEEP); 1098 } 1099 1100 if (sp->se_window) { 1101 start_window_system(sp); 1102 sleep(WINDOW_WAIT); 1103 } 1104 1105 sigemptyset(&mask); 1106 sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); 1107 1108 #ifdef LOGIN_CAP 1109 setprocresources(RESOURCE_GETTY); 1110 #endif 1111 if (sp->se_type) { 1112 /* Don't use malloc after fork */ 1113 strcpy(term, "TERM="); 1114 strncat(term, sp->se_type, sizeof(term) - 6); 1115 env[0] = term; 1116 env[1] = 0; 1117 } 1118 else 1119 env[0] = 0; 1120 execve(sp->se_getty_argv[0], sp->se_getty_argv, env); 1121 stall("can't exec getty '%s' for port %s: %m", 1122 sp->se_getty_argv[0], sp->se_device); 1123 _exit(1); 1124 } 1125 1126 /* 1127 * Collect exit status for a child. 1128 * If an exiting login, start a new login running. 1129 */ 1130 void 1131 collect_child(pid_t pid) 1132 { 1133 register session_t *sp, *sprev, *snext; 1134 1135 if (! sessions) 1136 return; 1137 1138 if (! (sp = find_session(pid))) 1139 return; 1140 1141 clear_session_logs(sp); 1142 del_session(sp); 1143 sp->se_process = 0; 1144 1145 if (sp->se_flags & SE_SHUTDOWN) { 1146 if ((sprev = sp->se_prev) != NULL) 1147 sprev->se_next = sp->se_next; 1148 else 1149 sessions = sp->se_next; 1150 if ((snext = sp->se_next) != NULL) 1151 snext->se_prev = sp->se_prev; 1152 free_session(sp); 1153 return; 1154 } 1155 1156 if ((pid = start_getty(sp)) == -1) { 1157 /* serious trouble */ 1158 requested_transition = clean_ttys; 1159 return; 1160 } 1161 1162 sp->se_process = pid; 1163 sp->se_started = time((time_t *) 0); 1164 add_session(sp); 1165 } 1166 1167 /* 1168 * Catch a signal and request a state transition. 1169 */ 1170 void 1171 transition_handler(int sig) 1172 { 1173 1174 switch (sig) { 1175 case SIGHUP: 1176 requested_transition = clean_ttys; 1177 break; 1178 case SIGUSR2: 1179 howto = RB_POWEROFF; 1180 case SIGUSR1: 1181 howto |= RB_HALT; 1182 case SIGINT: 1183 Reboot = TRUE; 1184 case SIGTERM: 1185 requested_transition = death; 1186 break; 1187 case SIGTSTP: 1188 requested_transition = catatonia; 1189 break; 1190 default: 1191 requested_transition = 0; 1192 break; 1193 } 1194 } 1195 1196 /* 1197 * Take the system multiuser. 1198 */ 1199 state_func_t 1200 multi_user(void) 1201 { 1202 pid_t pid; 1203 register session_t *sp; 1204 1205 requested_transition = 0; 1206 1207 /* 1208 * If the administrator has not set the security level to -1 1209 * to indicate that the kernel should not run multiuser in secure 1210 * mode, and the run script has not set a higher level of security 1211 * than level 1, then put the kernel into secure mode. 1212 */ 1213 if (getsecuritylevel() == 0) 1214 setsecuritylevel(1); 1215 1216 for (sp = sessions; sp; sp = sp->se_next) { 1217 if (sp->se_process) 1218 continue; 1219 if ((pid = start_getty(sp)) == -1) { 1220 /* serious trouble */ 1221 requested_transition = clean_ttys; 1222 break; 1223 } 1224 sp->se_process = pid; 1225 sp->se_started = time((time_t *) 0); 1226 add_session(sp); 1227 } 1228 1229 while (!requested_transition) 1230 if ((pid = waitpid(-1, (int *) 0, 0)) != -1) 1231 collect_child(pid); 1232 1233 return (state_func_t) requested_transition; 1234 } 1235 1236 /* 1237 * This is an (n*2)+(n^2) algorithm. We hope it isn't run often... 1238 */ 1239 state_func_t 1240 clean_ttys(void) 1241 { 1242 register session_t *sp, *sprev; 1243 register struct ttyent *typ; 1244 register int session_index = 0; 1245 register int devlen; 1246 char *old_getty, *old_window, *old_type; 1247 1248 if (! sessions) 1249 return (state_func_t) multi_user; 1250 1251 /* 1252 * mark all sessions for death, (!SE_PRESENT) 1253 * as we find or create new ones they'll be marked as keepers, 1254 * we'll later nuke all the ones not found in /etc/ttys 1255 */ 1256 for (sp = sessions; sp != NULL; sp = sp->se_next) 1257 sp->se_flags &= ~SE_PRESENT; 1258 1259 devlen = sizeof(_PATH_DEV) - 1; 1260 while ((typ = getttyent()) != NULL) { 1261 ++session_index; 1262 1263 for (sprev = 0, sp = sessions; sp; sprev = sp, sp = sp->se_next) 1264 if (strcmp(typ->ty_name, sp->se_device + devlen) == 0) 1265 break; 1266 1267 if (sp) { 1268 /* we want this one to live */ 1269 sp->se_flags |= SE_PRESENT; 1270 if (sp->se_index != session_index) { 1271 warning("port %s changed utmp index from %d to %d", 1272 sp->se_device, sp->se_index, 1273 session_index); 1274 sp->se_index = session_index; 1275 } 1276 if ((typ->ty_status & TTY_ON) == 0 || 1277 typ->ty_getty == 0) { 1278 sp->se_flags |= SE_SHUTDOWN; 1279 kill(sp->se_process, SIGHUP); 1280 continue; 1281 } 1282 sp->se_flags &= ~SE_SHUTDOWN; 1283 old_getty = sp->se_getty ? strdup(sp->se_getty) : 0; 1284 old_window = sp->se_window ? strdup(sp->se_window) : 0; 1285 old_type = sp->se_type ? strdup(sp->se_type) : 0; 1286 if (setupargv(sp, typ) == 0) { 1287 warning("can't parse getty for port %s", 1288 sp->se_device); 1289 sp->se_flags |= SE_SHUTDOWN; 1290 kill(sp->se_process, SIGHUP); 1291 } 1292 else if ( !old_getty 1293 || (!old_type && sp->se_type) 1294 || (old_type && !sp->se_type) 1295 || (!old_window && sp->se_window) 1296 || (old_window && !sp->se_window) 1297 || (strcmp(old_getty, sp->se_getty) != 0) 1298 || (old_window && strcmp(old_window, sp->se_window) != 0) 1299 || (old_type && strcmp(old_type, sp->se_type) != 0) 1300 ) { 1301 /* Don't set SE_SHUTDOWN here */ 1302 sp->se_nspace = 0; 1303 sp->se_started = 0; 1304 kill(sp->se_process, SIGHUP); 1305 } 1306 if (old_getty) 1307 free(old_getty); 1308 if (old_window) 1309 free(old_window); 1310 if (old_type) 1311 free(old_type); 1312 continue; 1313 } 1314 1315 new_session(sprev, session_index, typ); 1316 } 1317 1318 endttyent(); 1319 1320 /* 1321 * sweep through and kill all deleted sessions 1322 * ones who's /etc/ttys line was deleted (SE_PRESENT unset) 1323 */ 1324 for (sp = sessions; sp != NULL; sp = sp->se_next) { 1325 if ((sp->se_flags & SE_PRESENT) == 0) { 1326 sp->se_flags |= SE_SHUTDOWN; 1327 kill(sp->se_process, SIGHUP); 1328 } 1329 } 1330 1331 return (state_func_t) multi_user; 1332 } 1333 1334 /* 1335 * Block further logins. 1336 */ 1337 state_func_t 1338 catatonia(void) 1339 { 1340 register session_t *sp; 1341 1342 for (sp = sessions; sp; sp = sp->se_next) 1343 sp->se_flags |= SE_SHUTDOWN; 1344 1345 return (state_func_t) multi_user; 1346 } 1347 1348 /* 1349 * Note SIGALRM. 1350 */ 1351 void 1352 alrm_handler(int sig) 1353 { 1354 (void)sig; 1355 clang = 1; 1356 } 1357 1358 /* 1359 * Bring the system down to single user. 1360 */ 1361 state_func_t 1362 death(void) 1363 { 1364 register session_t *sp; 1365 register int i; 1366 pid_t pid; 1367 static const int death_sigs[2] = { SIGTERM, SIGKILL }; 1368 1369 /* NB: should send a message to the session logger to avoid blocking. */ 1370 logwtmp("~", "shutdown", ""); 1371 1372 for (sp = sessions; sp; sp = sp->se_next) { 1373 sp->se_flags |= SE_SHUTDOWN; 1374 kill(sp->se_process, SIGHUP); 1375 } 1376 1377 /* Try to run the rc.shutdown script within a period of time */ 1378 (void) runshutdown(); 1379 1380 for (i = 0; i < 2; ++i) { 1381 if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH) 1382 return (state_func_t) single_user; 1383 1384 clang = 0; 1385 alarm(DEATH_WATCH); 1386 do 1387 if ((pid = waitpid(-1, (int *)0, 0)) != -1) 1388 collect_child(pid); 1389 while (clang == 0 && errno != ECHILD); 1390 1391 if (errno == ECHILD) 1392 return (state_func_t) single_user; 1393 } 1394 1395 warning("some processes would not die; ps axl advised"); 1396 1397 return (state_func_t) single_user; 1398 } 1399 1400 /* 1401 * Run the system shutdown script. 1402 * 1403 * Exit codes: XXX I should document more 1404 * -2 shutdown script terminated abnormally 1405 * -1 fatal error - can't run script 1406 * 0 good. 1407 * >0 some error (exit code) 1408 */ 1409 int 1410 runshutdown(void) 1411 { 1412 pid_t pid, wpid; 1413 int status; 1414 int shutdowntimeout; 1415 size_t len; 1416 char *argv[4]; 1417 struct sigaction sa; 1418 struct stat sb; 1419 1420 /* 1421 * rc.shutdown is optional, so to prevent any unnecessary 1422 * complaints from the shell we simply don't run it if the 1423 * file does not exist. If the stat() here fails for other 1424 * reasons, we'll let the shell complain. 1425 */ 1426 if (stat(_PATH_RUNDOWN, &sb) == -1 && errno == ENOENT) 1427 return 0; 1428 1429 if ((pid = fork()) == 0) { 1430 int fd; 1431 1432 /* Assume that init already grab console as ctty before */ 1433 1434 sigemptyset(&sa.sa_mask); 1435 sa.sa_flags = 0; 1436 sa.sa_handler = SIG_IGN; 1437 (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); 1438 (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); 1439 1440 if ((fd = open(_PATH_CONSOLE, O_RDWR)) == -1) 1441 warning("can't open %s: %m", _PATH_CONSOLE); 1442 else { 1443 (void) dup2(fd, 0); 1444 (void) dup2(fd, 1); 1445 (void) dup2(fd, 2); 1446 if (fd > 2) 1447 close(fd); 1448 } 1449 1450 /* 1451 * Run the shutdown script. 1452 */ 1453 argv[0] = "sh"; 1454 argv[1] = _PATH_RUNDOWN; 1455 if (Reboot) 1456 argv[2] = "reboot"; 1457 else 1458 argv[2] = "single"; 1459 argv[3] = 0; 1460 1461 sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); 1462 1463 #ifdef LOGIN_CAP 1464 setprocresources(RESOURCE_RC); 1465 #endif 1466 execv(_PATH_BSHELL, argv); 1467 warning("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNDOWN); 1468 _exit(1); /* force single user mode */ 1469 } 1470 1471 if (pid == -1) { 1472 emergency("can't fork for %s on %s: %m", 1473 _PATH_BSHELL, _PATH_RUNDOWN); 1474 while (waitpid(-1, (int *) 0, WNOHANG) > 0) 1475 continue; 1476 sleep(STALL_TIMEOUT); 1477 return -1; 1478 } 1479 1480 len = sizeof(shutdowntimeout); 1481 if (sysctlbyname("kern.shutdown_timeout", 1482 &shutdowntimeout, 1483 &len, NULL, 0) == -1 || shutdowntimeout < 2) 1484 shutdowntimeout = DEATH_SCRIPT; 1485 alarm(shutdowntimeout); 1486 clang = 0; 1487 /* 1488 * Copied from single_user(). This is a bit paranoid. 1489 * Use the same ALRM handler. 1490 */ 1491 do { 1492 if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) 1493 collect_child(wpid); 1494 if (clang == 1) { 1495 /* we were waiting for the sub-shell */ 1496 kill(wpid, SIGTERM); 1497 warning("timeout expired for %s on %s: %m; going to single user mode", 1498 _PATH_BSHELL, _PATH_RUNDOWN); 1499 return -1; 1500 } 1501 if (wpid == -1) { 1502 if (errno == EINTR) 1503 continue; 1504 warning("wait for %s on %s failed: %m; going to single user mode", 1505 _PATH_BSHELL, _PATH_RUNDOWN); 1506 return -1; 1507 } 1508 if (wpid == pid && WIFSTOPPED(status)) { 1509 warning("init: %s on %s stopped, restarting\n", 1510 _PATH_BSHELL, _PATH_RUNDOWN); 1511 kill(pid, SIGCONT); 1512 wpid = -1; 1513 } 1514 } while (wpid != pid && !clang); 1515 1516 /* Turn off the alarm */ 1517 alarm(0); 1518 1519 if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && 1520 requested_transition == catatonia) { 1521 /* 1522 * /etc/rc.shutdown executed /sbin/reboot; 1523 * wait for the end quietly 1524 */ 1525 sigset_t s; 1526 1527 sigfillset(&s); 1528 for (;;) 1529 sigsuspend(&s); 1530 } 1531 1532 if (!WIFEXITED(status)) { 1533 warning("%s on %s terminated abnormally, going to single user mode", 1534 _PATH_BSHELL, _PATH_RUNDOWN); 1535 return -2; 1536 } 1537 1538 if ((status = WEXITSTATUS(status)) != 0) 1539 warning("%s returned status %d", _PATH_RUNDOWN, status); 1540 1541 return status; 1542 } 1543 1544 char * 1545 strk (char *p) 1546 { 1547 static char *t; 1548 char *q; 1549 int c; 1550 1551 if (p) 1552 t = p; 1553 if (!t) 1554 return 0; 1555 1556 c = *t; 1557 while (c == ' ' || c == '\t' ) 1558 c = *++t; 1559 if (!c) { 1560 t = 0; 1561 return 0; 1562 } 1563 q = t; 1564 if (c == '\'') { 1565 c = *++t; 1566 q = t; 1567 while (c && c != '\'') 1568 c = *++t; 1569 if (!c) /* unterminated string */ 1570 q = t = 0; 1571 else 1572 *t++ = 0; 1573 } else { 1574 while (c && c != ' ' && c != '\t' ) 1575 c = *++t; 1576 *t++ = 0; 1577 if (!c) 1578 t = 0; 1579 } 1580 return q; 1581 } 1582 1583 #ifdef LOGIN_CAP 1584 void 1585 setprocresources(const char *cname) 1586 { 1587 login_cap_t *lc; 1588 if ((lc = login_getclassbyname(cname, NULL)) != NULL) { 1589 setusercontext(lc, (struct passwd*)NULL, 0, LOGIN_SETPRIORITY|LOGIN_SETRESOURCES); 1590 login_close(lc); 1591 } 1592 } 1593 #endif 1594