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0a708c0e NW |
1 | /*- |
2 | * Copyright (c) 1991 The Regents of the University of California. | |
3 | * 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 | char copyright[] = | |
39 | "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ | |
40 | All rights reserved.\n"; | |
41 | #endif /* not lint */ | |
42 | ||
43 | #ifndef lint | |
44 | static char sccsid[] = "@(#)init.c 6.22 (Berkeley) 6/2/93"; | |
45 | #endif /* not lint */ | |
46 | ||
47 | #include <sys/param.h> | |
48 | #ifndef NOSYSCTL | |
49 | #include <sys/sysctl.h> | |
50 | #endif | |
51 | #include <sys/wait.h> | |
52 | ||
53 | #include <db.h> | |
54 | #include <errno.h> | |
55 | #include <fcntl.h> | |
56 | #include <signal.h> | |
57 | #include <stdio.h> | |
58 | #include <stdlib.h> | |
59 | #include <string.h> | |
60 | #include <syslog.h> | |
61 | #include <time.h> | |
62 | #include <ttyent.h> | |
63 | #include <unistd.h> | |
22860a22 | 64 | #include <sys/reboot.h> |
0a708c0e NW |
65 | |
66 | #ifdef __STDC__ | |
67 | #include <stdarg.h> | |
68 | #else | |
69 | #include <varargs.h> | |
70 | #endif | |
71 | ||
72 | #ifdef SECURE | |
73 | #include <pwd.h> | |
74 | #endif | |
75 | ||
76 | #include "pathnames.h" | |
77 | ||
78 | /* | |
79 | * Until the mythical util.h arrives... | |
80 | */ | |
81 | extern int login_tty __P((int)); | |
82 | extern int logout __P((const char *)); | |
83 | extern void logwtmp __P((const char *, const char *, const char *)); | |
84 | ||
85 | /* | |
86 | * Sleep times; used to prevent thrashing. | |
87 | */ | |
88 | #define GETTY_SPACING 5 /* N secs minimum getty spacing */ | |
89 | #define GETTY_SLEEP 30 /* sleep N secs after spacing problem */ | |
0a3a98ff | 90 | #define GETTY_NSPACE 3 /* max. spacing count to bring reaction */ |
0a708c0e NW |
91 | #define WINDOW_WAIT 3 /* wait N secs after starting window */ |
92 | #define STALL_TIMEOUT 30 /* wait N secs after warning */ | |
93 | #define DEATH_WATCH 10 /* wait N secs for procs to die */ | |
94 | ||
95 | void handle __P((sig_t, ...)); | |
96 | void delset __P((sigset_t *, ...)); | |
97 | ||
98 | void stall __P((char *, ...)); | |
99 | void warning __P((char *, ...)); | |
100 | void emergency __P((char *, ...)); | |
101 | void disaster __P((int)); | |
102 | void badsys __P((int)); | |
103 | ||
104 | /* | |
105 | * We really need a recursive typedef... | |
106 | * The following at least guarantees that the return type of (*state_t)() | |
107 | * is sufficiently wide to hold a function pointer. | |
108 | */ | |
109 | typedef long (*state_func_t) __P((void)); | |
110 | typedef state_func_t (*state_t) __P((void)); | |
111 | ||
112 | state_func_t single_user __P((void)); | |
113 | state_func_t runcom __P((void)); | |
114 | state_func_t read_ttys __P((void)); | |
115 | state_func_t multi_user __P((void)); | |
116 | state_func_t clean_ttys __P((void)); | |
117 | state_func_t catatonia __P((void)); | |
118 | state_func_t death __P((void)); | |
119 | ||
120 | enum { AUTOBOOT, FASTBOOT } runcom_mode = AUTOBOOT; | |
22860a22 | 121 | int noreboot = 0; |
0a708c0e NW |
122 | |
123 | void transition __P((state_t)); | |
124 | state_t requested_transition = runcom; | |
125 | ||
126 | void setctty __P((char *)); | |
127 | ||
128 | typedef struct init_session { | |
129 | int se_index; /* index of entry in ttys file */ | |
130 | pid_t se_process; /* controlling process */ | |
131 | time_t se_started; /* used to avoid thrashing */ | |
132 | int se_flags; /* status of session */ | |
133 | #define SE_SHUTDOWN 0x1 /* session won't be restarted */ | |
0a3a98ff | 134 | int se_nspace; /* spacing count */ |
0a708c0e | 135 | char *se_device; /* filename of port */ |
49866386 AC |
136 | char *se_getty; /* what to run on that port */ |
137 | char *se_getty_argv_space; /* pre-parsed argument array space */ | |
0a708c0e | 138 | char **se_getty_argv; /* pre-parsed argument array */ |
49866386 AC |
139 | char *se_window; /* window system (started only once) */ |
140 | char *se_window_argv_space; /* pre-parsed argument array space */ | |
0a708c0e | 141 | char **se_window_argv; /* pre-parsed argument array */ |
49866386 | 142 | char *se_type; /* default terminal type */ |
0a708c0e NW |
143 | struct init_session *se_prev; |
144 | struct init_session *se_next; | |
145 | } session_t; | |
146 | ||
147 | void free_session __P((session_t *)); | |
148 | session_t *new_session __P((session_t *, int, struct ttyent *)); | |
149 | session_t *sessions; | |
150 | ||
151 | char **construct_argv __P((char *)); | |
152 | void start_window_system __P((session_t *)); | |
153 | void collect_child __P((pid_t)); | |
154 | pid_t start_getty __P((session_t *)); | |
155 | void transition_handler __P((int)); | |
156 | void alrm_handler __P((int)); | |
157 | void setsecuritylevel __P((int)); | |
158 | int getsecuritylevel __P((void)); | |
159 | int setupargv __P((session_t *, struct ttyent *)); | |
160 | int clang; | |
161 | ||
162 | void clear_session_logs __P((session_t *)); | |
163 | ||
164 | int start_session_db __P((void)); | |
165 | void add_session __P((session_t *)); | |
166 | void del_session __P((session_t *)); | |
167 | session_t *find_session __P((pid_t)); | |
168 | DB *session_db; | |
169 | ||
170 | /* | |
171 | * The mother of all processes. | |
172 | */ | |
173 | int | |
174 | main(argc, argv) | |
175 | int argc; | |
176 | char **argv; | |
177 | { | |
178 | int c; | |
179 | struct sigaction sa; | |
180 | sigset_t mask; | |
181 | ||
182 | ||
183 | /* Dispose of random users. */ | |
184 | if (getuid() != 0) { | |
185 | (void)fprintf(stderr, "init: %s\n", strerror(EPERM)); | |
186 | exit (1); | |
187 | } | |
188 | ||
189 | /* System V users like to reexec init. */ | |
190 | if (getpid() != 1) { | |
191 | (void)fprintf(stderr, "init: already running\n"); | |
192 | exit (1); | |
193 | } | |
194 | ||
195 | /* | |
196 | * Note that this does NOT open a file... | |
197 | * Does 'init' deserve its own facility number? | |
198 | */ | |
199 | openlog("init", LOG_CONS|LOG_ODELAY, LOG_AUTH); | |
200 | ||
201 | /* | |
202 | * Create an initial session. | |
203 | */ | |
204 | if (setsid() < 0) | |
205 | warning("initial setsid() failed: %m"); | |
206 | ||
207 | /* | |
208 | * This code assumes that we always get arguments through flags, | |
209 | * never through bits set in some random machine register. | |
210 | */ | |
211 | while ((c = getopt(argc, argv, "sf")) != -1) | |
212 | switch (c) { | |
213 | case 's': | |
214 | requested_transition = single_user; | |
215 | break; | |
216 | case 'f': | |
217 | runcom_mode = FASTBOOT; | |
218 | break; | |
219 | default: | |
220 | warning("unrecognized flag '-%c'", c); | |
221 | break; | |
222 | } | |
223 | ||
224 | if (optind != argc) | |
225 | warning("ignoring excess arguments"); | |
226 | ||
227 | /* | |
228 | * We catch or block signals rather than ignore them, | |
229 | * so that they get reset on exec. | |
230 | */ | |
231 | handle(badsys, SIGSYS, 0); | |
232 | handle(disaster, SIGABRT, SIGFPE, SIGILL, SIGSEGV, | |
233 | SIGBUS, SIGXCPU, SIGXFSZ, 0); | |
22860a22 | 234 | handle(transition_handler, SIGHUP, SIGINT, SIGTERM, SIGTSTP, 0); |
0a708c0e NW |
235 | handle(alrm_handler, SIGALRM, 0); |
236 | sigfillset(&mask); | |
237 | delset(&mask, SIGABRT, SIGFPE, SIGILL, SIGSEGV, SIGBUS, SIGSYS, | |
22860a22 | 238 | SIGXCPU, SIGXFSZ, SIGHUP, SIGINT, SIGTERM, SIGTSTP, SIGALRM, 0); |
0a708c0e NW |
239 | sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); |
240 | sigemptyset(&sa.sa_mask); | |
241 | sa.sa_flags = 0; | |
242 | sa.sa_handler = SIG_IGN; | |
243 | (void) sigaction(SIGTTIN, &sa, (struct sigaction *)0); | |
244 | (void) sigaction(SIGTTOU, &sa, (struct sigaction *)0); | |
245 | ||
246 | /* | |
247 | * Paranoia. | |
248 | */ | |
249 | close(0); | |
250 | close(1); | |
251 | close(2); | |
252 | ||
253 | /* | |
254 | * Start the state machine. | |
255 | */ | |
256 | transition(requested_transition); | |
257 | ||
258 | /* | |
259 | * Should never reach here. | |
260 | */ | |
261 | return 1; | |
262 | } | |
263 | ||
264 | /* | |
265 | * Associate a function with a signal handler. | |
266 | */ | |
267 | void | |
268 | #ifdef __STDC__ | |
269 | handle(sig_t handler, ...) | |
270 | #else | |
271 | handle(va_alist) | |
272 | va_dcl | |
273 | #endif | |
274 | { | |
275 | int sig; | |
276 | struct sigaction sa; | |
277 | int mask_everything; | |
278 | va_list ap; | |
279 | #ifndef __STDC__ | |
280 | sig_t handler; | |
281 | ||
282 | va_start(ap); | |
283 | handler = va_arg(ap, sig_t); | |
284 | #else | |
285 | va_start(ap, handler); | |
286 | #endif | |
287 | ||
288 | sa.sa_handler = handler; | |
289 | sigfillset(&mask_everything); | |
290 | ||
291 | while (sig = va_arg(ap, int)) { | |
292 | sa.sa_mask = mask_everything; | |
293 | /* XXX SA_RESTART? */ | |
294 | sa.sa_flags = sig == SIGCHLD ? SA_NOCLDSTOP : 0; | |
295 | sigaction(sig, &sa, (struct sigaction *) 0); | |
296 | } | |
297 | va_end(ap); | |
298 | } | |
299 | ||
300 | /* | |
301 | * Delete a set of signals from a mask. | |
302 | */ | |
303 | void | |
304 | #ifdef __STDC__ | |
305 | delset(sigset_t *maskp, ...) | |
306 | #else | |
307 | delset(va_alist) | |
308 | va_dcl | |
309 | #endif | |
310 | { | |
311 | int sig; | |
312 | va_list ap; | |
313 | #ifndef __STDC__ | |
314 | sigset_t *maskp; | |
315 | ||
316 | va_start(ap); | |
317 | maskp = va_arg(ap, sigset_t *); | |
318 | #else | |
319 | va_start(ap, maskp); | |
320 | #endif | |
321 | ||
322 | while (sig = va_arg(ap, int)) | |
323 | sigdelset(maskp, sig); | |
324 | va_end(ap); | |
325 | } | |
326 | ||
327 | /* | |
328 | * Log a message and sleep for a while (to give someone an opportunity | |
329 | * to read it and to save log or hardcopy output if the problem is chronic). | |
330 | * NB: should send a message to the session logger to avoid blocking. | |
331 | */ | |
332 | void | |
333 | #ifdef __STDC__ | |
334 | stall(char *message, ...) | |
335 | #else | |
336 | stall(va_alist) | |
337 | va_dcl | |
338 | #endif | |
339 | { | |
340 | va_list ap; | |
341 | #ifndef __STDC__ | |
342 | char *message; | |
343 | ||
344 | va_start(ap); | |
345 | message = va_arg(ap, char *); | |
346 | #else | |
347 | va_start(ap, message); | |
348 | #endif | |
349 | ||
350 | vsyslog(LOG_ALERT, message, ap); | |
351 | va_end(ap); | |
352 | sleep(STALL_TIMEOUT); | |
353 | } | |
354 | ||
355 | /* | |
356 | * Like stall(), but doesn't sleep. | |
357 | * If cpp had variadic macros, the two functions could be #defines for another. | |
358 | * NB: should send a message to the session logger to avoid blocking. | |
359 | */ | |
360 | void | |
361 | #ifdef __STDC__ | |
362 | warning(char *message, ...) | |
363 | #else | |
364 | warning(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 | } | |
381 | ||
382 | /* | |
383 | * Log an emergency message. | |
384 | * NB: should send a message to the session logger to avoid blocking. | |
385 | */ | |
386 | void | |
387 | #ifdef __STDC__ | |
388 | emergency(char *message, ...) | |
389 | #else | |
390 | emergency(va_alist) | |
391 | va_dcl | |
392 | #endif | |
393 | { | |
394 | va_list ap; | |
395 | #ifndef __STDC__ | |
396 | char *message; | |
397 | ||
398 | va_start(ap); | |
399 | message = va_arg(ap, char *); | |
400 | #else | |
401 | va_start(ap, message); | |
402 | #endif | |
403 | ||
404 | vsyslog(LOG_EMERG, message, ap); | |
405 | va_end(ap); | |
406 | } | |
407 | ||
408 | /* | |
409 | * Catch a SIGSYS signal. | |
410 | * | |
411 | * These may arise if a system does not support sysctl. | |
412 | * We tolerate up to 25 of these, then throw in the towel. | |
413 | */ | |
414 | void | |
415 | badsys(sig) | |
416 | int sig; | |
417 | { | |
418 | static int badcount = 0; | |
419 | ||
420 | if (badcount++ < 25) | |
421 | return; | |
422 | disaster(sig); | |
423 | } | |
424 | ||
425 | /* | |
426 | * Catch an unexpected signal. | |
427 | */ | |
428 | void | |
429 | disaster(sig) | |
430 | int sig; | |
431 | { | |
432 | emergency("fatal signal: %s", | |
433 | sig < (unsigned) NSIG ? sys_siglist[sig] : "unknown signal"); | |
434 | ||
435 | sleep(STALL_TIMEOUT); | |
436 | _exit(sig); /* reboot */ | |
437 | } | |
438 | ||
439 | /* | |
440 | * Get the security level of the kernel. | |
441 | */ | |
442 | int | |
443 | getsecuritylevel() | |
444 | { | |
445 | #ifdef KERN_SECURELVL | |
446 | int name[2], curlevel; | |
447 | size_t len; | |
448 | extern int errno; | |
449 | ||
450 | name[0] = CTL_KERN; | |
451 | name[1] = KERN_SECURELVL; | |
452 | len = sizeof curlevel; | |
453 | if (sysctl(name, 2, &curlevel, &len, NULL, 0) == -1) { | |
454 | emergency("cannot get kernel security level: %s", | |
455 | strerror(errno)); | |
456 | return (-1); | |
457 | } | |
458 | return (curlevel); | |
459 | #else | |
460 | return (-1); | |
461 | #endif | |
462 | } | |
463 | ||
464 | /* | |
465 | * Set the security level of the kernel. | |
466 | */ | |
467 | void | |
468 | setsecuritylevel(newlevel) | |
469 | int newlevel; | |
470 | { | |
471 | #ifdef KERN_SECURELVL | |
472 | int name[2], curlevel; | |
473 | extern int errno; | |
474 | ||
475 | curlevel = getsecuritylevel(); | |
476 | if (newlevel == curlevel) | |
477 | return; | |
478 | name[0] = CTL_KERN; | |
479 | name[1] = KERN_SECURELVL; | |
480 | if (sysctl(name, 2, NULL, NULL, &newlevel, sizeof newlevel) == -1) { | |
481 | emergency( | |
482 | "cannot change kernel security level from %d to %d: %s", | |
483 | curlevel, newlevel, strerror(errno)); | |
484 | return; | |
485 | } | |
486 | #ifdef SECURE | |
487 | warning("kernel security level changed from %d to %d", | |
488 | curlevel, newlevel); | |
489 | #endif | |
490 | #endif | |
491 | } | |
492 | ||
493 | /* | |
494 | * Change states in the finite state machine. | |
495 | * The initial state is passed as an argument. | |
496 | */ | |
497 | void | |
498 | transition(s) | |
499 | state_t s; | |
500 | { | |
501 | for (;;) | |
502 | s = (state_t) (*s)(); | |
503 | } | |
504 | ||
505 | /* | |
506 | * Close out the accounting files for a login session. | |
507 | * NB: should send a message to the session logger to avoid blocking. | |
508 | */ | |
509 | void | |
510 | clear_session_logs(sp) | |
511 | session_t *sp; | |
512 | { | |
513 | char *line = sp->se_device + sizeof(_PATH_DEV) - 1; | |
514 | ||
515 | if (logout(line)) | |
516 | logwtmp(line, "", ""); | |
517 | } | |
518 | ||
519 | /* | |
520 | * Start a session and allocate a controlling terminal. | |
521 | * Only called by children of init after forking. | |
522 | */ | |
523 | void | |
524 | setctty(name) | |
525 | char *name; | |
526 | { | |
527 | int fd; | |
528 | ||
529 | (void) revoke(name); | |
df08b487 | 530 | #ifdef BROKEN_DTR |
0a708c0e | 531 | sleep (2); /* leave DTR low */ |
df08b487 | 532 | #endif |
0a708c0e NW |
533 | if ((fd = open(name, O_RDWR)) == -1) { |
534 | stall("can't open %s: %m", name); | |
535 | _exit(1); | |
536 | } | |
537 | if (login_tty(fd) == -1) { | |
538 | stall("can't get %s for controlling terminal: %m", name); | |
539 | _exit(1); | |
540 | } | |
541 | } | |
542 | ||
543 | /* | |
544 | * Bring the system up single user. | |
545 | */ | |
546 | state_func_t | |
547 | single_user() | |
548 | { | |
549 | pid_t pid, wpid; | |
550 | int status; | |
551 | sigset_t mask; | |
552 | char *shell = _PATH_BSHELL; | |
553 | char *argv[2]; | |
554 | #ifdef SECURE | |
555 | struct ttyent *typ; | |
556 | struct passwd *pp; | |
557 | static const char banner[] = | |
558 | "Enter root password, or ^D to go multi-user\n"; | |
559 | char *clear, *password; | |
560 | #endif | |
561 | ||
562 | /* | |
563 | * If the kernel is in secure mode, downgrade it to insecure mode. | |
564 | */ | |
565 | if (getsecuritylevel() > 0) | |
566 | setsecuritylevel(0); | |
567 | ||
22860a22 NW |
568 | if ( noreboot > 0) { |
569 | /* Instead of going single user, let's halt the machine */ | |
570 | sync(); | |
571 | alarm(2); | |
572 | pause(); | |
573 | reboot(RB_HALT); | |
574 | _exit(0); | |
575 | } | |
576 | ||
0a708c0e NW |
577 | if ((pid = fork()) == 0) { |
578 | /* | |
579 | * Start the single user session. | |
580 | */ | |
581 | setctty(_PATH_CONSOLE); | |
582 | ||
583 | #ifdef SECURE | |
584 | /* | |
585 | * Check the root password. | |
586 | * We don't care if the console is 'on' by default; | |
587 | * it's the only tty that can be 'off' and 'secure'. | |
588 | */ | |
589 | typ = getttynam("console"); | |
590 | pp = getpwnam("root"); | |
591 | if (typ && (typ->ty_status & TTY_SECURE) == 0 && pp) { | |
592 | write(2, banner, sizeof banner - 1); | |
593 | for (;;) { | |
594 | clear = getpass("Password:"); | |
595 | if (clear == 0 || *clear == '\0') | |
596 | _exit(0); | |
597 | password = crypt(clear, pp->pw_passwd); | |
598 | bzero(clear, _PASSWORD_LEN); | |
599 | if (strcmp(password, pp->pw_passwd) == 0) | |
600 | break; | |
601 | warning("single-user login failed\n"); | |
602 | } | |
603 | } | |
604 | endttyent(); | |
605 | endpwent(); | |
606 | #endif /* SECURE */ | |
607 | ||
608 | #ifdef DEBUGSHELL | |
609 | { | |
610 | char altshell[128], *cp = altshell; | |
611 | int num; | |
612 | ||
613 | #define SHREQUEST \ | |
614 | "Enter pathname of shell or RETURN for sh: " | |
615 | (void)write(STDERR_FILENO, | |
616 | SHREQUEST, sizeof(SHREQUEST) - 1); | |
617 | while ((num = read(STDIN_FILENO, cp, 1)) != -1 && | |
618 | num != 0 && *cp != '\n' && cp < &altshell[127]) | |
619 | cp++; | |
620 | *cp = '\0'; | |
621 | if (altshell[0] != '\0') | |
622 | shell = altshell; | |
623 | } | |
624 | #endif /* DEBUGSHELL */ | |
625 | ||
626 | /* | |
627 | * Unblock signals. | |
628 | * We catch all the interesting ones, | |
629 | * and those are reset to SIG_DFL on exec. | |
630 | */ | |
631 | sigemptyset(&mask); | |
632 | sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); | |
633 | ||
634 | /* | |
635 | * Fire off a shell. | |
636 | * If the default one doesn't work, try the Bourne shell. | |
637 | */ | |
638 | argv[0] = "-sh"; | |
639 | argv[1] = 0; | |
640 | execv(shell, argv); | |
641 | emergency("can't exec %s for single user: %m", shell); | |
642 | execv(_PATH_BSHELL, argv); | |
643 | emergency("can't exec %s for single user: %m", _PATH_BSHELL); | |
644 | sleep(STALL_TIMEOUT); | |
645 | _exit(1); | |
646 | } | |
647 | ||
648 | if (pid == -1) { | |
649 | /* | |
650 | * We are seriously hosed. Do our best. | |
651 | */ | |
652 | emergency("can't fork single-user shell, trying again"); | |
653 | while (waitpid(-1, (int *) 0, WNOHANG) > 0) | |
654 | continue; | |
655 | return (state_func_t) single_user; | |
656 | } | |
657 | ||
658 | requested_transition = 0; | |
659 | do { | |
660 | if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) | |
661 | collect_child(wpid); | |
662 | if (wpid == -1) { | |
663 | if (errno == EINTR) | |
664 | continue; | |
665 | warning("wait for single-user shell failed: %m; restarting"); | |
666 | return (state_func_t) single_user; | |
667 | } | |
668 | if (wpid == pid && WIFSTOPPED(status)) { | |
669 | warning("init: shell stopped, restarting\n"); | |
670 | kill(pid, SIGCONT); | |
671 | wpid = -1; | |
672 | } | |
673 | } while (wpid != pid && !requested_transition); | |
674 | ||
675 | if (requested_transition) | |
676 | return (state_func_t) requested_transition; | |
677 | ||
678 | if (!WIFEXITED(status)) { | |
679 | if (WTERMSIG(status) == SIGKILL) { | |
680 | /* | |
681 | * reboot(8) killed shell? | |
682 | */ | |
683 | warning("single user shell terminated."); | |
684 | sleep(STALL_TIMEOUT); | |
685 | _exit(0); | |
686 | } else { | |
687 | warning("single user shell terminated, restarting"); | |
688 | return (state_func_t) single_user; | |
689 | } | |
690 | } | |
691 | ||
692 | runcom_mode = FASTBOOT; | |
693 | return (state_func_t) runcom; | |
694 | } | |
695 | ||
696 | /* | |
697 | * Run the system startup script. | |
698 | */ | |
699 | state_func_t | |
700 | runcom() | |
701 | { | |
702 | pid_t pid, wpid; | |
703 | int status; | |
704 | char *argv[4]; | |
705 | struct sigaction sa; | |
706 | ||
707 | if ((pid = fork()) == 0) { | |
708 | sigemptyset(&sa.sa_mask); | |
709 | sa.sa_flags = 0; | |
710 | sa.sa_handler = SIG_IGN; | |
711 | (void) sigaction(SIGTSTP, &sa, (struct sigaction *)0); | |
712 | (void) sigaction(SIGHUP, &sa, (struct sigaction *)0); | |
713 | ||
714 | setctty(_PATH_CONSOLE); | |
715 | ||
716 | argv[0] = "sh"; | |
717 | argv[1] = _PATH_RUNCOM; | |
718 | argv[2] = runcom_mode == AUTOBOOT ? "autoboot" : 0; | |
719 | argv[3] = 0; | |
720 | ||
721 | sigprocmask(SIG_SETMASK, &sa.sa_mask, (sigset_t *) 0); | |
722 | ||
723 | execv(_PATH_BSHELL, argv); | |
724 | stall("can't exec %s for %s: %m", _PATH_BSHELL, _PATH_RUNCOM); | |
725 | _exit(1); /* force single user mode */ | |
726 | } | |
727 | ||
728 | if (pid == -1) { | |
729 | emergency("can't fork for %s on %s: %m", | |
730 | _PATH_BSHELL, _PATH_RUNCOM); | |
731 | while (waitpid(-1, (int *) 0, WNOHANG) > 0) | |
732 | continue; | |
733 | sleep(STALL_TIMEOUT); | |
734 | return (state_func_t) single_user; | |
735 | } | |
736 | ||
737 | /* | |
738 | * Copied from single_user(). This is a bit paranoid. | |
739 | */ | |
740 | do { | |
741 | if ((wpid = waitpid(-1, &status, WUNTRACED)) != -1) | |
742 | collect_child(wpid); | |
743 | if (wpid == -1) { | |
744 | if (errno == EINTR) | |
745 | continue; | |
746 | warning("wait for %s on %s failed: %m; going to single user mode", | |
747 | _PATH_BSHELL, _PATH_RUNCOM); | |
748 | return (state_func_t) single_user; | |
749 | } | |
750 | if (wpid == pid && WIFSTOPPED(status)) { | |
751 | warning("init: %s on %s stopped, restarting\n", | |
752 | _PATH_BSHELL, _PATH_RUNCOM); | |
753 | kill(pid, SIGCONT); | |
754 | wpid = -1; | |
755 | } | |
756 | } while (wpid != pid); | |
757 | ||
758 | if (WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM && | |
759 | requested_transition == catatonia) { | |
760 | /* /etc/rc executed /sbin/reboot; wait for the end quietly */ | |
761 | sigset_t s; | |
762 | ||
763 | sigfillset(&s); | |
764 | for (;;) | |
765 | sigsuspend(&s); | |
766 | } | |
767 | ||
768 | if (!WIFEXITED(status)) { | |
769 | warning("%s on %s terminated abnormally, going to single user mode", | |
770 | _PATH_BSHELL, _PATH_RUNCOM); | |
771 | return (state_func_t) single_user; | |
772 | } | |
773 | ||
774 | if (WEXITSTATUS(status)) | |
775 | return (state_func_t) single_user; | |
776 | ||
777 | runcom_mode = AUTOBOOT; /* the default */ | |
778 | /* NB: should send a message to the session logger to avoid blocking. */ | |
779 | logwtmp("~", "reboot", ""); | |
780 | return (state_func_t) read_ttys; | |
781 | } | |
782 | ||
783 | /* | |
784 | * Open the session database. | |
785 | * | |
786 | * NB: We could pass in the size here; is it necessary? | |
787 | */ | |
788 | int | |
789 | start_session_db() | |
790 | { | |
791 | if (session_db && (*session_db->close)(session_db)) | |
792 | emergency("session database close: %s", strerror(errno)); | |
793 | if ((session_db = dbopen(NULL, O_RDWR, 0, DB_HASH, NULL)) == 0) { | |
794 | emergency("session database open: %s", strerror(errno)); | |
795 | return (1); | |
796 | } | |
797 | return (0); | |
798 | ||
799 | } | |
800 | ||
801 | /* | |
802 | * Add a new login session. | |
803 | */ | |
804 | void | |
805 | add_session(sp) | |
806 | session_t *sp; | |
807 | { | |
808 | DBT key; | |
809 | DBT data; | |
810 | ||
811 | key.data = &sp->se_process; | |
812 | key.size = sizeof sp->se_process; | |
813 | data.data = &sp; | |
814 | data.size = sizeof sp; | |
815 | ||
816 | if ((*session_db->put)(session_db, &key, &data, 0)) | |
817 | emergency("insert %d: %s", sp->se_process, strerror(errno)); | |
818 | } | |
819 | ||
820 | /* | |
821 | * Delete an old login session. | |
822 | */ | |
823 | void | |
824 | del_session(sp) | |
825 | session_t *sp; | |
826 | { | |
827 | DBT key; | |
828 | ||
829 | key.data = &sp->se_process; | |
830 | key.size = sizeof sp->se_process; | |
831 | ||
832 | if ((*session_db->del)(session_db, &key, 0)) | |
833 | emergency("delete %d: %s", sp->se_process, strerror(errno)); | |
834 | } | |
835 | ||
836 | /* | |
837 | * Look up a login session by pid. | |
838 | */ | |
839 | session_t * | |
840 | #ifdef __STDC__ | |
841 | find_session(pid_t pid) | |
842 | #else | |
843 | find_session(pid) | |
844 | pid_t pid; | |
845 | #endif | |
846 | { | |
847 | DBT key; | |
848 | DBT data; | |
849 | session_t *ret; | |
850 | ||
851 | key.data = &pid; | |
852 | key.size = sizeof pid; | |
853 | if ((*session_db->get)(session_db, &key, &data, 0) != 0) | |
854 | return 0; | |
855 | bcopy(data.data, (char *)&ret, sizeof(ret)); | |
856 | return ret; | |
857 | } | |
858 | ||
859 | /* | |
860 | * Construct an argument vector from a command line. | |
861 | */ | |
862 | char ** | |
863 | construct_argv(command) | |
864 | char *command; | |
865 | { | |
866 | register int argc = 0; | |
867 | register char **argv = (char **) malloc(((strlen(command) + 1) / 2 + 1) | |
868 | * sizeof (char *)); | |
869 | static const char separators[] = " \t"; | |
870 | ||
871 | if ((argv[argc++] = strtok(command, separators)) == 0) | |
872 | return 0; | |
873 | while (argv[argc++] = strtok((char *) 0, separators)) | |
874 | continue; | |
875 | return argv; | |
876 | } | |
877 | ||
878 | /* | |
879 | * Deallocate a session descriptor. | |
880 | */ | |
881 | void | |
882 | free_session(sp) | |
883 | register session_t *sp; | |
884 | { | |
885 | free(sp->se_device); | |
886 | if (sp->se_getty) { | |
887 | free(sp->se_getty); | |
49866386 | 888 | free(sp->se_getty_argv_space); |
0a708c0e NW |
889 | free(sp->se_getty_argv); |
890 | } | |
891 | if (sp->se_window) { | |
892 | free(sp->se_window); | |
49866386 | 893 | free(sp->se_window_argv_space); |
0a708c0e NW |
894 | free(sp->se_window_argv); |
895 | } | |
49866386 AC |
896 | if (sp->se_type) |
897 | free(sp->se_type); | |
0a708c0e NW |
898 | free(sp); |
899 | } | |
900 | ||
901 | /* | |
902 | * Allocate a new session descriptor. | |
903 | */ | |
904 | session_t * | |
905 | new_session(sprev, session_index, typ) | |
906 | session_t *sprev; | |
907 | int session_index; | |
908 | register struct ttyent *typ; | |
909 | { | |
910 | register session_t *sp; | |
911 | ||
912 | if ((typ->ty_status & TTY_ON) == 0 || | |
913 | typ->ty_name == 0 || | |
914 | typ->ty_getty == 0) | |
915 | return 0; | |
916 | ||
917 | sp = (session_t *) malloc(sizeof (session_t)); | |
918 | bzero(sp, sizeof *sp); | |
919 | ||
920 | sp->se_index = session_index; | |
921 | ||
922 | sp->se_device = malloc(sizeof(_PATH_DEV) + strlen(typ->ty_name)); | |
923 | (void) sprintf(sp->se_device, "%s%s", _PATH_DEV, typ->ty_name); | |
924 | ||
925 | if (setupargv(sp, typ) == 0) { | |
926 | free_session(sp); | |
927 | return (0); | |
928 | } | |
929 | ||
930 | sp->se_next = 0; | |
931 | if (sprev == 0) { | |
932 | sessions = sp; | |
933 | sp->se_prev = 0; | |
934 | } else { | |
935 | sprev->se_next = sp; | |
936 | sp->se_prev = sprev; | |
937 | } | |
938 | ||
939 | return sp; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Calculate getty and if useful window argv vectors. | |
944 | */ | |
945 | int | |
946 | setupargv(sp, typ) | |
947 | session_t *sp; | |
948 | struct ttyent *typ; | |
949 | { | |
950 | ||
951 | if (sp->se_getty) { | |
952 | free(sp->se_getty); | |
49866386 | 953 | free(sp->se_getty_argv_space); |
0a708c0e NW |
954 | free(sp->se_getty_argv); |
955 | } | |
956 | sp->se_getty = malloc(strlen(typ->ty_getty) + strlen(typ->ty_name) + 2); | |
957 | (void) sprintf(sp->se_getty, "%s %s", typ->ty_getty, typ->ty_name); | |
49866386 AC |
958 | sp->se_getty_argv_space = strdup(sp->se_getty); |
959 | sp->se_getty_argv = construct_argv(sp->se_getty_argv_space); | |
0a708c0e NW |
960 | if (sp->se_getty_argv == 0) { |
961 | warning("can't parse getty for port %s", sp->se_device); | |
962 | free(sp->se_getty); | |
49866386 AC |
963 | free(sp->se_getty_argv_space); |
964 | sp->se_getty = sp->se_getty_argv_space = 0; | |
0a708c0e NW |
965 | return (0); |
966 | } | |
49866386 AC |
967 | if (sp->se_window) { |
968 | free(sp->se_window); | |
969 | free(sp->se_window_argv_space); | |
970 | free(sp->se_window_argv); | |
971 | } | |
972 | sp->se_window = sp->se_window_argv_space = 0; | |
973 | sp->se_window_argv = 0; | |
0a708c0e | 974 | if (typ->ty_window) { |
0a708c0e | 975 | sp->se_window = strdup(typ->ty_window); |
49866386 AC |
976 | sp->se_window_argv_space = strdup(sp->se_window); |
977 | sp->se_window_argv = construct_argv(sp->se_window_argv_space); | |
0a708c0e NW |
978 | if (sp->se_window_argv == 0) { |
979 | warning("can't parse window for port %s", | |
980 | sp->se_device); | |
49866386 | 981 | free(sp->se_window_argv_space); |
0a708c0e | 982 | free(sp->se_window); |
49866386 | 983 | sp->se_window = sp->se_window_argv_space = 0; |
0a708c0e NW |
984 | return (0); |
985 | } | |
986 | } | |
49866386 AC |
987 | if (sp->se_type) |
988 | free(sp->se_type); | |
989 | sp->se_type = typ->ty_type ? strdup(typ->ty_type) : 0; | |
0a708c0e NW |
990 | return (1); |
991 | } | |
992 | ||
993 | /* | |
994 | * Walk the list of ttys and create sessions for each active line. | |
995 | */ | |
996 | state_func_t | |
997 | read_ttys() | |
998 | { | |
999 | int session_index = 0; | |
1000 | register session_t *sp, *snext; | |
1001 | register struct ttyent *typ; | |
1002 | ||
1003 | /* | |
1004 | * Destroy any previous session state. | |
1005 | * There shouldn't be any, but just in case... | |
1006 | */ | |
1007 | for (sp = sessions; sp; sp = snext) { | |
1008 | if (sp->se_process) | |
1009 | clear_session_logs(sp); | |
1010 | snext = sp->se_next; | |
1011 | free_session(sp); | |
1012 | } | |
1013 | sessions = 0; | |
1014 | if (start_session_db()) | |
1015 | return (state_func_t) single_user; | |
1016 | ||
1017 | /* | |
1018 | * Allocate a session entry for each active port. | |
1019 | * Note that sp starts at 0. | |
1020 | */ | |
1021 | while (typ = getttyent()) | |
1022 | if (snext = new_session(sp, ++session_index, typ)) | |
1023 | sp = snext; | |
1024 | ||
1025 | endttyent(); | |
1026 | ||
1027 | return (state_func_t) multi_user; | |
1028 | } | |
1029 | ||
1030 | /* | |
1031 | * Start a window system running. | |
1032 | */ | |
1033 | void | |
1034 | start_window_system(sp) | |
1035 | session_t *sp; | |
1036 | { | |
1037 | pid_t pid; | |
1038 | sigset_t mask; | |
49866386 | 1039 | char term[64], *env[2]; |
0a708c0e NW |
1040 | |
1041 | if ((pid = fork()) == -1) { | |
1042 | emergency("can't fork for window system on port %s: %m", | |
1043 | sp->se_device); | |
1044 | /* hope that getty fails and we can try again */ | |
1045 | return; | |
1046 | } | |
1047 | ||
1048 | if (pid) | |
1049 | return; | |
1050 | ||
1051 | sigemptyset(&mask); | |
1052 | sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); | |
1053 | ||
1054 | if (setsid() < 0) | |
1055 | emergency("setsid failed (window) %m"); | |
1056 | ||
49866386 AC |
1057 | if (sp->se_type) { |
1058 | /* Don't use malloc after fork */ | |
1059 | strcpy(term, "TERM="); | |
1060 | strcat(term, sp->se_type); | |
1061 | env[0] = term; | |
1062 | env[1] = 0; | |
1063 | } | |
1064 | else | |
1065 | env[0] = 0; | |
1066 | execve(sp->se_window_argv[0], sp->se_window_argv, env); | |
0a708c0e NW |
1067 | stall("can't exec window system '%s' for port %s: %m", |
1068 | sp->se_window_argv[0], sp->se_device); | |
1069 | _exit(1); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | * Start a login session running. | |
1074 | */ | |
1075 | pid_t | |
1076 | start_getty(sp) | |
1077 | session_t *sp; | |
1078 | { | |
1079 | pid_t pid; | |
1080 | sigset_t mask; | |
1081 | time_t current_time = time((time_t *) 0); | |
49866386 | 1082 | char term[64], *env[2]; |
0a708c0e NW |
1083 | |
1084 | /* | |
1085 | * fork(), not vfork() -- we can't afford to block. | |
1086 | */ | |
1087 | if ((pid = fork()) == -1) { | |
1088 | emergency("can't fork for getty on port %s: %m", sp->se_device); | |
1089 | return -1; | |
1090 | } | |
1091 | ||
1092 | if (pid) | |
1093 | return pid; | |
1094 | ||
1095 | if (current_time > sp->se_started && | |
1096 | current_time - sp->se_started < GETTY_SPACING) { | |
0a3a98ff AC |
1097 | if (++sp->se_nspace > GETTY_NSPACE) { |
1098 | sp->se_nspace = 0; | |
1099 | warning("getty repeating too quickly on port %s, sleeping %d secs", | |
1100 | sp->se_device, GETTY_SLEEP); | |
0a708c0e NW |
1101 | sleep((unsigned) GETTY_SLEEP); |
1102 | } | |
0a3a98ff AC |
1103 | } |
1104 | else | |
1105 | sp->se_nspace = 0; | |
0a708c0e NW |
1106 | |
1107 | if (sp->se_window) { | |
1108 | start_window_system(sp); | |
1109 | sleep(WINDOW_WAIT); | |
1110 | } | |
1111 | ||
1112 | sigemptyset(&mask); | |
1113 | sigprocmask(SIG_SETMASK, &mask, (sigset_t *) 0); | |
1114 | ||
49866386 AC |
1115 | if (sp->se_type) { |
1116 | /* Don't use malloc after fork */ | |
1117 | strcpy(term, "TERM="); | |
1118 | strcat(term, sp->se_type); | |
1119 | env[0] = term; | |
1120 | env[1] = 0; | |
1121 | } | |
1122 | else | |
1123 | env[0] = 0; | |
1124 | execve(sp->se_getty_argv[0], sp->se_getty_argv, env); | |
0a708c0e NW |
1125 | stall("can't exec getty '%s' for port %s: %m", |
1126 | sp->se_getty_argv[0], sp->se_device); | |
1127 | _exit(1); | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | * Collect exit status for a child. | |
1132 | * If an exiting login, start a new login running. | |
1133 | */ | |
1134 | void | |
1135 | #ifdef __STDC__ | |
1136 | collect_child(pid_t pid) | |
1137 | #else | |
1138 | collect_child(pid) | |
1139 | pid_t pid; | |
1140 | #endif | |
1141 | { | |
1142 | register session_t *sp, *sprev, *snext; | |
1143 | ||
1144 | if (! sessions) | |
1145 | return; | |
1146 | ||
1147 | if (! (sp = find_session(pid))) | |
1148 | return; | |
1149 | ||
1150 | clear_session_logs(sp); | |
1151 | del_session(sp); | |
1152 | sp->se_process = 0; | |
1153 | ||
1154 | if (sp->se_flags & SE_SHUTDOWN) { | |
1155 | if (sprev = sp->se_prev) | |
1156 | sprev->se_next = sp->se_next; | |
1157 | else | |
1158 | sessions = sp->se_next; | |
1159 | if (snext = sp->se_next) | |
1160 | snext->se_prev = sp->se_prev; | |
1161 | free_session(sp); | |
1162 | return; | |
1163 | } | |
1164 | ||
1165 | if ((pid = start_getty(sp)) == -1) { | |
1166 | /* serious trouble */ | |
1167 | requested_transition = clean_ttys; | |
1168 | return; | |
1169 | } | |
1170 | ||
1171 | sp->se_process = pid; | |
1172 | sp->se_started = time((time_t *) 0); | |
1173 | add_session(sp); | |
1174 | } | |
1175 | ||
1176 | /* | |
1177 | * Catch a signal and request a state transition. | |
1178 | */ | |
1179 | void | |
1180 | transition_handler(sig) | |
1181 | int sig; | |
1182 | { | |
1183 | ||
1184 | switch (sig) { | |
1185 | case SIGHUP: | |
1186 | requested_transition = clean_ttys; | |
1187 | break; | |
22860a22 NW |
1188 | case SIGINT: |
1189 | noreboot++; | |
0a708c0e NW |
1190 | case SIGTERM: |
1191 | requested_transition = death; | |
1192 | break; | |
1193 | case SIGTSTP: | |
1194 | requested_transition = catatonia; | |
1195 | break; | |
1196 | default: | |
1197 | requested_transition = 0; | |
1198 | break; | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | /* | |
1203 | * Take the system multiuser. | |
1204 | */ | |
1205 | state_func_t | |
1206 | multi_user() | |
1207 | { | |
1208 | pid_t pid; | |
1209 | register session_t *sp; | |
1210 | ||
1211 | requested_transition = 0; | |
1212 | ||
1213 | /* | |
1214 | * If the administrator has not set the security level to -1 | |
1215 | * to indicate that the kernel should not run multiuser in secure | |
1216 | * mode, and the run script has not set a higher level of security | |
1217 | * than level 1, then put the kernel into secure mode. | |
1218 | */ | |
1219 | if (getsecuritylevel() == 0) | |
1220 | setsecuritylevel(1); | |
1221 | ||
1222 | for (sp = sessions; sp; sp = sp->se_next) { | |
1223 | if (sp->se_process) | |
1224 | continue; | |
1225 | if ((pid = start_getty(sp)) == -1) { | |
1226 | /* serious trouble */ | |
1227 | requested_transition = clean_ttys; | |
1228 | break; | |
1229 | } | |
1230 | sp->se_process = pid; | |
1231 | sp->se_started = time((time_t *) 0); | |
1232 | add_session(sp); | |
1233 | } | |
1234 | ||
1235 | while (!requested_transition) | |
1236 | if ((pid = waitpid(-1, (int *) 0, 0)) != -1) | |
1237 | collect_child(pid); | |
1238 | ||
1239 | return (state_func_t) requested_transition; | |
1240 | } | |
1241 | ||
1242 | /* | |
1243 | * This is an n-squared algorithm. We hope it isn't run often... | |
1244 | */ | |
1245 | state_func_t | |
1246 | clean_ttys() | |
1247 | { | |
1248 | register session_t *sp, *sprev; | |
1249 | register struct ttyent *typ; | |
1250 | register int session_index = 0; | |
1251 | register int devlen; | |
49866386 | 1252 | char *old_getty, *old_window, *old_type; |
0a708c0e NW |
1253 | |
1254 | if (! sessions) | |
1255 | return (state_func_t) multi_user; | |
1256 | ||
1257 | devlen = sizeof(_PATH_DEV) - 1; | |
1258 | while (typ = getttyent()) { | |
1259 | ++session_index; | |
1260 | ||
1261 | for (sprev = 0, sp = sessions; sp; sprev = sp, sp = sp->se_next) | |
1262 | if (strcmp(typ->ty_name, sp->se_device + devlen) == 0) | |
1263 | break; | |
1264 | ||
1265 | if (sp) { | |
1266 | if (sp->se_index != session_index) { | |
1267 | warning("port %s changed utmp index from %d to %d", | |
1268 | sp->se_device, sp->se_index, | |
1269 | session_index); | |
1270 | sp->se_index = session_index; | |
1271 | } | |
1272 | if ((typ->ty_status & TTY_ON) == 0 || | |
1273 | typ->ty_getty == 0) { | |
1274 | sp->se_flags |= SE_SHUTDOWN; | |
1275 | kill(sp->se_process, SIGHUP); | |
1276 | continue; | |
1277 | } | |
1278 | sp->se_flags &= ~SE_SHUTDOWN; | |
49866386 AC |
1279 | old_getty = sp->se_getty ? strdup(sp->se_getty) : 0; |
1280 | old_window = sp->se_window ? strdup(sp->se_window) : 0; | |
1281 | old_type = sp->se_type ? strdup(sp->se_type) : 0; | |
0a708c0e NW |
1282 | if (setupargv(sp, typ) == 0) { |
1283 | warning("can't parse getty for port %s", | |
1284 | sp->se_device); | |
1285 | sp->se_flags |= SE_SHUTDOWN; | |
1286 | kill(sp->se_process, SIGHUP); | |
1287 | } | |
49866386 AC |
1288 | else if ( !old_getty |
1289 | || !old_type && sp->se_type | |
1290 | || old_type && !sp->se_type | |
1291 | || !old_window && sp->se_window | |
1292 | || old_window && !sp->se_window | |
1293 | || strcmp(old_getty, sp->se_getty) != 0 | |
1294 | || old_window && strcmp(old_window, sp->se_window) != 0 | |
1295 | || old_type && strcmp(old_type, sp->se_type) != 0 | |
3be802d9 | 1296 | ) { |
49866386 | 1297 | /* Don't set SE_SHUTDOWN here */ |
3be802d9 AC |
1298 | sp->se_nspace = 0; |
1299 | sp->se_started = 0; | |
49866386 | 1300 | kill(sp->se_process, SIGHUP); |
3be802d9 | 1301 | } |
49866386 AC |
1302 | if (old_getty) |
1303 | free(old_getty); | |
1304 | if (old_getty) | |
1305 | free(old_window); | |
1306 | if (old_type) | |
1307 | free(old_type); | |
0a708c0e NW |
1308 | continue; |
1309 | } | |
1310 | ||
1311 | new_session(sprev, session_index, typ); | |
1312 | } | |
1313 | ||
1314 | endttyent(); | |
1315 | ||
1316 | return (state_func_t) multi_user; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Block further logins. | |
1321 | */ | |
1322 | state_func_t | |
1323 | catatonia() | |
1324 | { | |
1325 | register session_t *sp; | |
1326 | ||
1327 | for (sp = sessions; sp; sp = sp->se_next) | |
1328 | sp->se_flags |= SE_SHUTDOWN; | |
1329 | ||
1330 | return (state_func_t) multi_user; | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | * Note SIGALRM. | |
1335 | */ | |
1336 | void | |
1337 | alrm_handler(sig) | |
1338 | int sig; | |
1339 | { | |
1340 | clang = 1; | |
1341 | } | |
1342 | ||
1343 | /* | |
1344 | * Bring the system down to single user. | |
1345 | */ | |
1346 | state_func_t | |
1347 | death() | |
1348 | { | |
1349 | register session_t *sp; | |
1350 | register int i; | |
1351 | pid_t pid; | |
1352 | static const int death_sigs[3] = { SIGHUP, SIGTERM, SIGKILL }; | |
1353 | ||
1354 | for (sp = sessions; sp; sp = sp->se_next) | |
1355 | sp->se_flags |= SE_SHUTDOWN; | |
1356 | ||
1357 | /* NB: should send a message to the session logger to avoid blocking. */ | |
1358 | logwtmp("~", "shutdown", ""); | |
1359 | ||
1360 | for (i = 0; i < 3; ++i) { | |
1361 | if (kill(-1, death_sigs[i]) == -1 && errno == ESRCH) | |
1362 | return (state_func_t) single_user; | |
1363 | ||
1364 | clang = 0; | |
1365 | alarm(DEATH_WATCH); | |
1366 | do | |
1367 | if ((pid = waitpid(-1, (int *)0, 0)) != -1) | |
1368 | collect_child(pid); | |
1369 | while (clang == 0 && errno != ECHILD); | |
1370 | ||
1371 | if (errno == ECHILD) | |
1372 | return (state_func_t) single_user; | |
1373 | } | |
1374 | ||
1375 | warning("some processes would not die; ps axl advised"); | |
1376 | ||
1377 | return (state_func_t) single_user; | |
1378 | } |