069c185c |
1 | /* -*-c-*- |
2 | * |
6a2d21e4 |
3 | * $Id: pixie.c,v 1.4 2000/06/17 11:50:53 mdw Exp $ |
069c185c |
4 | * |
5 | * Passphrase pixie for Catacomb |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of Catacomb. |
13 | * |
14 | * Catacomb is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * Catacomb is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with Catacomb; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: pixie.c,v $ |
6a2d21e4 |
33 | * Revision 1.4 2000/06/17 11:50:53 mdw |
34 | * New pixie protocol allowing application to request passphrases and send |
35 | * them to the pixie. Use the secure arena interface for the input |
36 | * buffer. Extend the input buffer. Other minor fixes. |
37 | * |
2b2d07ca |
38 | * Revision 1.3 1999/12/22 22:14:40 mdw |
39 | * Only produce initialization message if verbose. |
40 | * |
52b8f75d |
41 | * Revision 1.2 1999/12/22 22:13:42 mdw |
42 | * Fix bug in passphrase flushing loop. |
43 | * |
069c185c |
44 | * Revision 1.1 1999/12/22 15:58:41 mdw |
45 | * Passphrase pixie support. |
46 | * |
47 | */ |
48 | |
49 | /*----- Header files ------------------------------------------------------*/ |
50 | |
51 | #include "config.h" |
52 | |
53 | #include <assert.h> |
54 | #include <ctype.h> |
55 | #include <errno.h> |
56 | #include <signal.h> |
57 | #include <stdarg.h> |
58 | #include <stddef.h> |
59 | #include <stdio.h> |
60 | #include <stdlib.h> |
61 | #include <string.h> |
62 | #include <time.h> |
63 | |
64 | #include <sys/types.h> |
65 | #include <sys/time.h> |
66 | #include <unistd.h> |
67 | #include <sys/stat.h> |
68 | #include <sys/wait.h> |
69 | #include <pwd.h> |
70 | #include <fcntl.h> |
71 | #include <sys/ioctl.h> |
72 | #include <termios.h> |
73 | #include <syslog.h> |
74 | |
75 | #include <sys/socket.h> |
76 | #include <sys/un.h> |
77 | |
78 | #include <mLib/alloc.h> |
79 | #include <mLib/dstr.h> |
80 | #include <mLib/fdflags.h> |
81 | #include <mLib/mdwopt.h> |
82 | #include <mLib/quis.h> |
83 | #include <mLib/report.h> |
84 | #include <mLib/sel.h> |
85 | #include <mLib/selbuf.h> |
86 | #include <mLib/sig.h> |
87 | #include <mLib/str.h> |
88 | #include <mLib/sub.h> |
89 | #include <mLib/tv.h> |
90 | |
6a2d21e4 |
91 | #include "arena.h" |
069c185c |
92 | #include "lmem.h" |
93 | #include "passphrase.h" |
94 | #include "pixie.h" |
95 | |
96 | /*----- Static variables --------------------------------------------------*/ |
97 | |
98 | static unsigned long timeout = 300; |
99 | static sel_state sel; |
100 | static unsigned verbose = 1; |
101 | static const char *command = 0; |
102 | static lmem lm; |
103 | static unsigned flags = 0; |
104 | |
105 | enum { |
6a2d21e4 |
106 | F_SYSLOG = 1, |
107 | F_FETCH = 2 |
069c185c |
108 | }; |
109 | |
110 | /*----- Event logging -----------------------------------------------------*/ |
111 | |
112 | /* --- @log@ --- * |
113 | * |
114 | * Arguments: @const char *p@ = @printf@-style format string |
115 | * @...@ = extra arguments to fill in |
116 | * |
117 | * Returns: --- |
118 | * |
119 | * Use: Writes out a timestamped log message. |
120 | */ |
121 | |
122 | static void log(const char *p, ...) |
123 | { |
124 | dstr d = DSTR_INIT; |
125 | va_list ap; |
126 | |
127 | if (!(flags & F_SYSLOG)) { |
128 | time_t t = time(0); |
129 | struct tm *tm = localtime(&t); |
130 | DENSURE(&d, 64); |
131 | d.len += strftime(d.buf, d.sz, "%Y-%m-%d %H:%M:%S ", tm); |
132 | } |
133 | va_start(ap, p); |
134 | dstr_vputf(&d, p, ap); |
135 | va_end(ap); |
136 | |
137 | if (flags & F_SYSLOG) |
138 | syslog(LOG_NOTICE, "%s", d.buf); |
139 | else { |
140 | DPUTC(&d, '\n'); |
141 | dstr_write(&d, stderr); |
142 | } |
143 | DDESTROY(&d); |
144 | } |
145 | |
146 | /*----- Passphrase management ---------------------------------------------*/ |
147 | |
148 | /* --- Data structures --- */ |
149 | |
150 | typedef struct phrase { |
151 | struct phrase *next; |
152 | struct phrase *prev; |
153 | char *tag; |
154 | char *p; |
155 | unsigned long t; |
156 | sel_timer timer; |
157 | unsigned f; |
158 | } phrase; |
159 | |
160 | /* --- Variables --- */ |
161 | |
162 | #define P_ROOT ((phrase *)&p_root) |
163 | static struct { phrase *next; phrase *prev; } p_root = { P_ROOT, P_ROOT }; |
164 | |
165 | /* --- @p_free@ --- * |
166 | * |
167 | * Arguments: @phrase *p@ = pointer to phrase block |
168 | * |
169 | * Returns: --- |
170 | * |
171 | * Use: Frees a phrase block. |
172 | */ |
173 | |
174 | static void p_free(phrase *p) |
175 | { |
176 | if (p->t) |
177 | sel_rmtimer(&p->timer); |
178 | free(p->tag); |
179 | l_free(&lm, p->p); |
180 | p->next->prev = p->prev; |
181 | p->prev->next = p->next; |
182 | DESTROY(p); |
183 | } |
184 | |
185 | /* --- @p_timer@ --- * |
186 | * |
187 | * Arguments: @struct timeval *tv@ = current time |
188 | * @void *p@ = pointer to phrase |
189 | * |
190 | * Returns: --- |
191 | * |
192 | * Use: Expires a passphrase. |
193 | */ |
194 | |
195 | static void p_timer(struct timeval *tv, void *p) |
196 | { |
197 | phrase *pp = p; |
198 | if (verbose) |
199 | log("expiring passphrase `%s'", pp->tag); |
200 | p_free(pp); |
201 | } |
202 | |
203 | /* --- @p_alloc@ --- * |
204 | * |
205 | * Arguments: @size_t sz@ = amount of memory required |
206 | * |
207 | * Returns: Pointer to allocated memory, or null. |
208 | * |
209 | * Use: Allocates some locked memory, flushing old passphrases if |
210 | * there's not enough space. |
211 | */ |
212 | |
213 | static void *p_alloc(size_t sz) |
214 | { |
215 | for (;;) { |
216 | char *p; |
217 | if ((p = l_alloc(&lm, sz)) != 0) |
218 | return (p); |
219 | if (P_ROOT->next == P_ROOT) |
220 | return (0); |
221 | if (verbose) { |
222 | log("flushing passphrase `%s' to free up needed space", |
223 | P_ROOT->next->tag); |
224 | } |
225 | p_free(P_ROOT->next); |
226 | } |
227 | } |
228 | |
229 | /* --- @p_find@ --- * |
230 | * |
231 | * Arguments: @const char *tag@ = pointer to tag to find |
232 | * |
233 | * Returns: Pointer to passphrase block, or null. |
234 | * |
235 | * Use: Finds a passphrase with a given tag. |
236 | */ |
237 | |
238 | static phrase *p_find(const char *tag) |
239 | { |
240 | phrase *p; |
241 | |
242 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
243 | if (strcmp(p->tag, tag) == 0) { |
244 | if (p->t) { |
245 | struct timeval tv; |
246 | sel_rmtimer(&p->timer); |
247 | gettimeofday(&tv, 0); |
248 | tv.tv_sec += p->t; |
249 | sel_addtimer(&sel, &p->timer, &tv, p_timer, p); |
250 | } |
251 | p->next->prev = p->prev; |
252 | p->prev->next = p->next; |
253 | p->next = P_ROOT; |
254 | p->prev = P_ROOT->prev; |
255 | P_ROOT->prev->next = p; |
256 | P_ROOT->prev = p; |
257 | return (p); |
258 | } |
259 | } |
260 | return (0); |
261 | } |
262 | |
263 | /* --- @p_add@ --- * |
264 | * |
265 | * Arguments: @const char *tag@ = pointer to tag string |
266 | * @const char *p@ = pointer to passphrase |
267 | * @unsigned long t@ = expiry timeout |
268 | * |
269 | * Returns: Pointer to newly-added passphrase. |
270 | * |
271 | * Use: Adds a new passphrase. The tag must not already exist. |
272 | */ |
273 | |
274 | static phrase *p_add(const char *tag, const char *p, unsigned long t) |
275 | { |
276 | size_t sz = strlen(p) + 1; |
277 | char *l = p_alloc(sz); |
278 | phrase *pp; |
279 | |
280 | /* --- Make sure the locked memory was allocated --- */ |
281 | |
282 | if (!l) |
283 | return (0); |
284 | |
285 | /* --- Fill in some other bits of the block --- */ |
286 | |
287 | pp = CREATE(phrase); |
288 | memcpy(l, p, sz); |
289 | pp->p = l; |
290 | pp->tag = xstrdup(tag); |
291 | pp->f = 0; |
292 | |
293 | /* --- Set the timer --- */ |
294 | |
295 | pp->t = t; |
296 | if (t) { |
297 | struct timeval tv; |
298 | gettimeofday(&tv, 0); |
299 | tv.tv_sec += t; |
300 | sel_addtimer(&sel, &pp->timer, &tv, p_timer, pp); |
301 | } |
302 | |
303 | /* --- Link the block into the chain --- */ |
304 | |
305 | pp->next = P_ROOT; |
306 | pp->prev = P_ROOT->prev; |
307 | P_ROOT->prev->next = pp; |
308 | P_ROOT->prev = pp; |
309 | return (pp); |
310 | } |
311 | |
312 | /* --- @p_flush@ --- * |
313 | * |
314 | * Arguments: @const char *tag@ = pointer to tag string, or zero for all |
315 | * |
316 | * Returns: --- |
317 | * |
318 | * Use: Immediately flushes either a single phrase or all of them. |
319 | */ |
320 | |
321 | static void p_flush(const char *tag) |
322 | { |
323 | phrase *p; |
324 | |
325 | if (!tag && verbose > 1) |
326 | log("flushing all passphrases"); |
52b8f75d |
327 | p = P_ROOT->next; |
328 | while (p != P_ROOT) { |
329 | phrase *pp = p->next; |
069c185c |
330 | if (!tag) |
331 | p_free(p); |
332 | else if (strcmp(p->tag, tag) == 0) { |
333 | if (verbose > 1) |
334 | log("flushing passphrase `%s'", tag); |
335 | p_free(p); |
336 | break; |
337 | } |
52b8f75d |
338 | p = pp; |
069c185c |
339 | } |
340 | } |
341 | |
342 | /*----- Reading passphrases -----------------------------------------------*/ |
343 | |
344 | /* --- @p_request@ --- * |
345 | * |
346 | * Arguments: @const char *msg@ = message string |
347 | * @const char *tag@ = pointer to tag string |
348 | * @char *buf@ = pointer to (locked) buffer |
349 | * @size_t sz@ = size of buffer |
350 | * |
351 | * Returns: Zero if all went well, nonzero otherwise. |
352 | * |
353 | * Use: Requests a passphrase from the user. |
354 | */ |
355 | |
356 | static int p_request(const char *msg, const char *tag, char *buf, size_t sz) |
357 | { |
358 | /* --- If there's a passphrase-fetching command, run it --- */ |
359 | |
360 | if (command) { |
361 | dstr d = DSTR_INIT; |
362 | const char *p; |
363 | int fd[2]; |
364 | pid_t kid; |
365 | int r; |
366 | |
367 | /* --- Substitute the prompt string into the command --- */ |
368 | |
369 | p = command; |
370 | for (;;) { |
371 | const char *q = strchr(p, '%'); |
372 | if (!q || !q[1]) { |
373 | DPUTS(&d, p); |
374 | break; |
375 | } |
376 | DPUTM(&d, p, q - p); |
377 | p = q + 1; |
378 | switch (*p) { |
379 | case 'm': |
380 | DPUTS(&d, msg); |
381 | break; |
382 | case 't': |
383 | DPUTS(&d, tag); |
384 | break; |
385 | default: |
386 | DPUTC(&d, '%'); |
387 | DPUTC(&d, *p); |
388 | break; |
389 | } |
390 | p++; |
391 | } |
392 | DPUTZ(&d); |
393 | |
394 | /* --- Create a pipe and start a child process --- */ |
395 | |
396 | if (pipe(fd)) |
397 | goto fail_1; |
398 | if ((kid = fork()) < 0) |
399 | goto fail_2; |
400 | |
401 | /* --- Child process --- */ |
402 | |
403 | fflush(0); |
404 | if (kid == 0) { |
405 | if (dup2(fd[1], STDOUT_FILENO) < 0) |
406 | _exit(127); |
407 | close(fd[0]); |
408 | execl("/bin/sh", "sh", "-c", d.buf, (void *)0); |
409 | _exit(127); |
410 | } |
411 | |
412 | /* --- Read the data back into my buffer --- */ |
413 | |
414 | close(fd[1]); |
415 | if ((r = read(fd[0], buf, sz - 1)) >= 0) { |
416 | char *q = memchr(buf, '\n', r); |
417 | if (!q) |
418 | q = buf + r; |
419 | *q = 0; |
420 | } |
421 | close(fd[0]); |
422 | waitpid(kid, 0, 0); |
423 | dstr_destroy(&d); |
424 | if (r < 0) |
425 | goto fail_0; |
6a2d21e4 |
426 | goto ok; |
069c185c |
427 | |
428 | /* --- Tidy up when things go wrong --- */ |
429 | |
430 | fail_2: |
431 | close(fd[0]); |
432 | close(fd[1]); |
433 | fail_1: |
434 | dstr_destroy(&d); |
435 | fail_0: |
436 | return (-1); |
437 | } |
438 | |
439 | /* --- Read a passphrase from the terminal --- * |
440 | * |
441 | * Use the standard Catacomb passphrase-reading function, so it'll read the |
442 | * passphrase from a file descriptor or something if the appropriate |
443 | * environment variable is set. |
444 | */ |
445 | |
446 | { |
447 | dstr d = DSTR_INIT; |
448 | int rc; |
449 | dstr_putf(&d, "%s %s: ", msg, tag); |
450 | rc = pixie_getpass(d.buf, buf, sz); |
451 | dstr_destroy(&d); |
6a2d21e4 |
452 | if (rc) |
453 | return (rc); |
454 | goto ok; |
069c185c |
455 | } |
6a2d21e4 |
456 | |
457 | /* --- Sort out the buffer --- * |
458 | * |
459 | * Strip leading spaces. |
460 | */ |
461 | |
462 | ok: { |
463 | char *p = buf; |
464 | size_t len; |
465 | while (isspace((unsigned char)*p)) |
466 | p++; |
467 | len = strlen(p); |
468 | memmove(buf, p, len); |
469 | p[len] = 0; |
470 | } |
471 | |
472 | /* --- Done --- */ |
473 | |
474 | return (0); |
069c185c |
475 | } |
476 | |
477 | /* --- @p_get@ --- * |
478 | * |
6a2d21e4 |
479 | * Arguments: @const char **q@ = where to store the result |
480 | * @const char *tag@ = pointer to tag string |
069c185c |
481 | * @unsigned mode@ = reading mode (verify?) |
482 | * @time_t exp@ = expiry time suggestion |
483 | * |
6a2d21e4 |
484 | * Returns: Zero if successful, @-1@ on a read failure, or @+1@ if the |
485 | * passphrase is missing and there is no fetcher. (This will |
486 | * always happen if there is no fetcher and @mode@ is |
487 | * @PMODE_VERIFY@. |
069c185c |
488 | * |
489 | * Use: Reads a passphrase from somewhere. |
490 | */ |
491 | |
6a2d21e4 |
492 | static int p_get(const char **q, const char *tag, unsigned mode, time_t exp) |
069c185c |
493 | { |
494 | #define LBUFSZ 1024 |
495 | |
496 | phrase *p; |
497 | char *pp = 0; |
498 | |
499 | /* --- Write a log message --- */ |
500 | |
501 | if (verbose > 1) |
502 | log("passphrase `%s' requested", tag); |
503 | |
6a2d21e4 |
504 | /* --- If there is no fetcher, life is simpler --- */ |
505 | |
506 | if (!(flags & F_FETCH)) { |
507 | if (mode == PMODE_VERIFY) |
508 | return (+1); |
509 | if ((p = p_find(tag)) == 0) |
510 | return (+1); |
511 | *q = p->p; |
512 | return (0); |
513 | } |
514 | |
069c185c |
515 | /* --- Try to find the phrase --- */ |
516 | |
6a2d21e4 |
517 | if (mode == PMODE_VERIFY) |
518 | p_flush(tag); |
519 | if (mode == PMODE_VERIFY || (p = p_find(tag)) == 0) { |
069c185c |
520 | if ((pp = p_alloc(LBUFSZ)) == 0) |
521 | goto fail; |
6a2d21e4 |
522 | if (p_request(mode == PMODE_READ ? "Passphrase" : "New passphrase", |
523 | tag, pp, LBUFSZ) < 0) |
069c185c |
524 | goto fail; |
525 | p = p_add(tag, pp, exp); |
526 | if (!p) |
527 | goto fail; |
528 | } |
529 | |
530 | /* --- If verification is requested, verify the passphrase --- */ |
531 | |
532 | if (mode == PMODE_VERIFY) { |
533 | if (!pp && (pp = p_alloc(LBUFSZ)) == 0) |
534 | goto fail; |
535 | if (p_request("Verify passphrase", tag, pp, LBUFSZ) < 0) |
536 | goto fail; |
537 | if (strcmp(pp, p->p) != 0) { |
538 | if (verbose) |
539 | log("passphrases for `%s' don't match", tag); |
540 | p_free(p); |
541 | goto fail; |
542 | } |
543 | } |
544 | |
545 | /* --- Tidy up and return the passphrase --- */ |
546 | |
547 | if (pp) { |
548 | memset(pp, 0, LBUFSZ); |
549 | l_free(&lm, pp); |
550 | } |
6a2d21e4 |
551 | *q = p->p; |
552 | return (0); |
069c185c |
553 | |
554 | /* --- Tidy up if things went wrong --- */ |
555 | |
556 | fail: |
557 | if (pp) { |
558 | memset(pp, 0, LBUFSZ); |
559 | l_free(&lm, pp); |
560 | } |
561 | return (0); |
562 | |
563 | #undef LBUFSZ |
564 | } |
565 | |
566 | /*----- Server command parsing --------------------------------------------*/ |
567 | |
568 | /* --- Data structures --- */ |
569 | |
570 | typedef struct pixserv { |
571 | selbuf b; |
572 | int fd; |
573 | sel_timer timer; |
6a2d21e4 |
574 | unsigned f; |
069c185c |
575 | } pixserv; |
576 | |
6a2d21e4 |
577 | enum { px_stdin = 1 }; |
578 | |
579 | #define PIXSERV_TIMEOUT 30 |
069c185c |
580 | |
581 | /* --- @pixserv_expire@ --- * |
582 | * |
583 | * Arguments: @struct timeval *tv@ = pointer to current time |
584 | * @void *p@ = pointer to server block |
585 | * |
586 | * Returns: --- |
587 | * |
588 | * Use: Expires a pixie connection if the remote end decides he's not |
589 | * interested any more. |
590 | */ |
591 | |
592 | static void pixserv_expire(struct timeval *tv, void *p) |
593 | { |
594 | pixserv *px = p; |
595 | if (px->fd != px->b.reader.fd) |
596 | close(px->fd); |
6a2d21e4 |
597 | selbuf_destroy(&px->b); |
069c185c |
598 | close(px->b.reader.fd); |
599 | DESTROY(px); |
600 | } |
601 | |
602 | /* --- @pixserv_write@ --- * |
603 | * |
604 | * Arguments: @pixserv *px@ = pointer to server block |
605 | * @const char *p@ = pointer to skeleton string |
606 | * @...@ = other arguments to fill in |
607 | * |
608 | * Returns: --- |
609 | * |
610 | * Use: Formats a string and emits it to the output file. |
611 | */ |
612 | |
613 | static void pixserv_write(pixserv *px, const char *p, ...) |
614 | { |
615 | dstr d = DSTR_INIT; |
616 | va_list ap; |
617 | |
618 | va_start(ap, p); |
619 | dstr_vputf(&d, p, ap); |
620 | write(px->fd, d.buf, d.len); |
621 | va_end(ap); |
622 | dstr_destroy(&d); |
623 | } |
624 | |
625 | /* --- @pixserv_timeout@ --- * |
626 | * |
627 | * Arguments: @const char *p@ = pointer to timeout string |
628 | * |
629 | * Returns: Timeout in seconds. |
630 | * |
631 | * Use: Translates a string to a timeout value in seconds. |
632 | */ |
633 | |
634 | static unsigned long pixserv_timeout(const char *p) |
635 | { |
636 | unsigned long t; |
637 | char *q; |
638 | |
639 | if (!p) |
640 | return (timeout); |
641 | |
642 | t = strtoul(p, &q, 0); |
643 | switch (*q) { |
644 | case 'd': t *= 24; |
645 | case 'h': t *= 60; |
646 | case 'm': t *= 60; |
647 | case 's': if (q[1] != 0) |
648 | default: t = 0; |
649 | case 0: break; |
650 | } |
651 | return (t); |
652 | } |
653 | |
654 | /* --- @pixserv_line@ --- * |
655 | * |
656 | * Arguments: @char *s@ = pointer to the line read |
657 | * @void *p@ = pointer to server block |
658 | * |
659 | * Returns: --- |
660 | * |
661 | * Use: Handles a line read from the client. |
662 | */ |
663 | |
664 | static void pixserv_line(char *s, void *p) |
665 | { |
666 | pixserv *px = p; |
667 | char *q, *qq; |
668 | unsigned mode; |
669 | |
670 | /* --- Handle an end-of-file --- */ |
671 | |
6a2d21e4 |
672 | if (!(px->f & px_stdin)) |
673 | sel_rmtimer(&px->timer); |
069c185c |
674 | if (!s) { |
675 | if (px->fd != px->b.reader.fd) |
676 | close(px->fd); |
6a2d21e4 |
677 | selbuf_destroy(&px->b); |
069c185c |
678 | close(px->b.reader.fd); |
679 | return; |
680 | } |
681 | |
682 | /* --- Fiddle the timeout --- */ |
683 | |
6a2d21e4 |
684 | if (!(px->f & px_stdin)) { |
069c185c |
685 | struct timeval tv; |
686 | gettimeofday(&tv, 0); |
687 | tv.tv_sec += PIXSERV_TIMEOUT; |
688 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
689 | } |
690 | |
691 | /* --- Scan out the first word --- */ |
692 | |
693 | if ((q = str_getword(&s)) == 0) |
694 | return; |
695 | for (qq = q; *qq; qq++) |
696 | *qq = tolower((unsigned char)*qq); |
697 | |
698 | /* --- Handle a help request --- */ |
699 | |
700 | if (strcmp(q, "help") == 0) { |
701 | pixserv_write(px, "\ |
702 | INFO Commands supported:\n\ |
703 | INFO HELP\n\ |
704 | INFO LIST\n\ |
705 | INFO PASS tag [expire]\n\ |
706 | INFO VERIFY tag [expire]\n\ |
707 | INFO FLUSH [tag]\n\ |
6a2d21e4 |
708 | INFO SET tag [expire] -- phrase\n\ |
069c185c |
709 | INFO QUIT\n\ |
710 | OK\n\ |
711 | "); |
712 | } |
713 | |
714 | /* --- List the passphrases --- */ |
715 | |
716 | else if (strcmp(q, "list") == 0) { |
717 | phrase *p; |
718 | |
719 | for (p = P_ROOT->next; p != P_ROOT; p = p->next) { |
720 | if (!p->t) |
721 | pixserv_write(px, "ITEM %s no-expire\n", p->tag); |
722 | else { |
723 | struct timeval tv; |
724 | gettimeofday(&tv, 0); |
725 | TV_SUB(&tv, &p->timer.tv, &tv); |
726 | pixserv_write(px, "ITEM %s %i\n", p->tag, tv.tv_sec); |
727 | } |
728 | } |
729 | pixserv_write(px, "OK\n"); |
730 | } |
731 | |
732 | /* --- Request a passphrase --- */ |
733 | |
734 | else if ((mode = PMODE_READ, strcmp(q, "pass") == 0) || |
735 | (mode = PMODE_VERIFY, strcmp(q, "verify") == 0)) { |
736 | unsigned long t; |
737 | const char *p; |
6a2d21e4 |
738 | int rc; |
069c185c |
739 | |
740 | if ((q = str_getword(&s)) == 0) |
741 | pixserv_write(px, "FAIL missing tag\n"); |
742 | else if ((t = pixserv_timeout(s)) == 0) |
743 | pixserv_write(px, "FAIL bad timeout\n"); |
6a2d21e4 |
744 | else { |
745 | rc = p_get(&p, q, mode, t > timeout ? timeout : t); |
746 | switch (rc) { |
747 | case 0: |
748 | pixserv_write(px, "OK %s\n", p); |
749 | break; |
750 | case -1: |
751 | pixserv_write(px, "FAIL error reading passphrase\n"); |
752 | break; |
753 | case +1: |
754 | pixserv_write(px, "MISSING\n"); |
755 | break; |
756 | } |
757 | } |
069c185c |
758 | } |
759 | |
760 | /* --- Flush existing passphrases --- */ |
761 | |
762 | else if (strcmp(q, "flush") == 0) { |
763 | q = str_getword(&s); |
764 | p_flush(q); |
765 | pixserv_write(px, "OK\n"); |
766 | } |
767 | |
6a2d21e4 |
768 | /* --- Set a passphrase --- */ |
769 | |
770 | else if (strcmp(q, "set") == 0) { |
771 | char *tag; |
772 | unsigned long t; |
773 | if ((tag = str_getword(&s)) == 0) |
774 | pixserv_write(px, "FAIL missing tag\n"); |
775 | else if ((q = str_getword(&s)) == 0) |
776 | pixserv_write(px, "FAIL no passphrase\n"); |
777 | else { |
778 | if (strcmp(q, "--") != 0) { |
779 | t = pixserv_timeout(q); |
780 | q = str_getword(&s); |
781 | } else |
782 | t = pixserv_timeout(0); |
783 | if (!q) |
784 | pixserv_write(px, "FAIL no passphrase\n"); |
785 | else if (strcmp(q, "--") != 0) |
786 | pixserv_write(px, "FAIL rubbish found before passphrase\n"); |
787 | else { |
788 | p_flush(tag); |
789 | p_add(tag, s, t); |
790 | pixserv_write(px, "OK\n"); |
791 | } |
792 | } |
793 | } |
794 | |
069c185c |
795 | /* --- Shut the server down --- */ |
796 | |
797 | else if (strcmp(q, "quit") == 0) { |
798 | if (verbose) |
6a2d21e4 |
799 | log("%s client requested shutdown", |
800 | px->f & px_stdin ? "local" : "remote"); |
069c185c |
801 | pixserv_write(px, "OK\n"); |
802 | exit(0); |
803 | } |
804 | |
805 | /* --- Report an error for other commands --- */ |
806 | |
807 | else |
808 | pixserv_write(px, "FAIL unknown command `%s'\n", q); |
809 | } |
810 | |
811 | /* --- @pixserv_create@ --- * |
812 | * |
813 | * Arguments: @int fd@ = file descriptor to read from |
814 | * @int ofd@ = file descriptor to write to |
815 | * |
6a2d21e4 |
816 | * Returns: Pointer to the new connection. |
069c185c |
817 | * |
818 | * Use: Creates a new Pixie server instance for a new connection. |
819 | */ |
820 | |
6a2d21e4 |
821 | static pixserv *pixserv_create(int fd, int ofd) |
069c185c |
822 | { |
823 | pixserv *px = CREATE(pixserv); |
824 | struct timeval tv; |
825 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
826 | if (ofd != fd) |
827 | fdflags(ofd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
828 | px->fd = ofd; |
829 | selbuf_init(&px->b, &sel, fd, pixserv_line, px); |
6a2d21e4 |
830 | px->b.b.a = arena_secure; |
831 | selbuf_setsize(&px->b, 1024); |
069c185c |
832 | gettimeofday(&tv, 0); |
833 | tv.tv_sec += PIXSERV_TIMEOUT; |
834 | sel_addtimer(&sel, &px->timer, &tv, pixserv_expire, px); |
6a2d21e4 |
835 | px->f = 0; |
836 | return (px); |
069c185c |
837 | } |
838 | |
839 | /* --- @pixserv_accept@ --- * |
840 | * |
841 | * Arguments: @int fd@ = file descriptor |
842 | * @unsigned mode@ = what's happened |
843 | * @void *p@ = an uninteresting argument |
844 | * |
845 | * Returns: --- |
846 | * |
847 | * Use: Accepts a new connection. |
848 | */ |
849 | |
850 | static void pixserv_accept(int fd, unsigned mode, void *p) |
851 | { |
852 | int nfd; |
853 | struct sockaddr_un sun; |
854 | int sunsz = sizeof(sun); |
855 | |
856 | if (mode != SEL_READ) |
857 | return; |
858 | if ((nfd = accept(fd, (struct sockaddr *)&sun, &sunsz)) < 0) { |
859 | if (verbose) |
860 | log("new connection failed: %s", strerror(errno)); |
861 | return; |
862 | } |
863 | pixserv_create(nfd, nfd); |
864 | } |
865 | |
866 | /*----- Setting up the server ---------------------------------------------*/ |
867 | |
868 | /* --- @unlinksocket@ --- * |
869 | * |
870 | * Arguments: --- |
871 | * |
872 | * Returns: --- |
873 | * |
874 | * Use: Tidies up the socket when it's finished with. |
875 | */ |
876 | |
877 | static char *sockpath; |
878 | |
879 | static void unlinksocket(void) |
880 | { |
881 | unlink(sockpath); |
882 | l_purge(&lm); |
883 | } |
884 | |
885 | /* --- @pix_sigdie@ --- * |
886 | * |
887 | * Arguments: @int sig@ = signal number |
888 | * @void *p@ = uninteresting argument |
889 | * |
890 | * Returns: --- |
891 | * |
892 | * Use: Shuts down the program after a fatal signal. |
893 | */ |
894 | |
895 | static void pix_sigdie(int sig, void *p) |
896 | { |
897 | if (verbose) { |
898 | char *p; |
899 | char buf[20]; |
900 | |
901 | switch (sig) { |
902 | case SIGTERM: p = "SIGTERM"; break; |
903 | case SIGINT: p = "SIGINT"; break; |
904 | default: |
905 | sprintf(buf, "signal %i", sig); |
906 | p = buf; |
907 | break; |
908 | } |
909 | log("shutting down on %s", p); |
910 | } |
911 | exit(0); |
912 | } |
913 | |
914 | /* --- @pix_sigflush@ --- * |
915 | * |
916 | * Arguments: @int sig@ = signal number |
917 | * @void *p@ = uninteresting argument |
918 | * |
919 | * Returns: --- |
920 | * |
921 | * Use: Flushes the passphrase cache on receipt of a signal. |
922 | */ |
923 | |
924 | static void pix_sigflush(int sig, void *p) |
925 | { |
926 | if (verbose) { |
927 | char *p; |
928 | char buf[20]; |
929 | |
930 | switch (sig) { |
931 | case SIGHUP: p = "SIGHUP"; break; |
932 | case SIGQUIT: p = "SIGQUIT"; break; |
933 | default: |
934 | sprintf(buf, "signal %i", sig); |
935 | p = buf; |
936 | break; |
937 | } |
938 | log("received %s; flushing passphrases", p); |
939 | } |
940 | p_flush(0); |
941 | } |
942 | |
943 | /* --- @pix_setup@ --- * |
944 | * |
945 | * Arguments: @struct sockaddr_un *sun@ = pointer to address to use |
946 | * @size_t sz@ = size of socket address |
947 | * |
948 | * Returns: --- |
949 | * |
950 | * Use: Sets up the pixie's Unix-domain socket. |
951 | */ |
952 | |
953 | static void pix_setup(struct sockaddr_un *sun, size_t sz) |
954 | { |
955 | int fd; |
956 | |
957 | /* --- Set up the parent directory --- */ |
958 | |
959 | { |
960 | dstr d = DSTR_INIT; |
961 | char *p = sun->sun_path; |
962 | char *q = strrchr(p, '/'); |
963 | |
964 | if (q) { |
965 | struct stat st; |
966 | |
967 | DPUTM(&d, p, q - p); |
968 | DPUTZ(&d); |
969 | |
970 | mkdir(d.buf, 0700); |
971 | if (stat(d.buf, &st)) |
972 | die(1, "couldn't stat `%s': %s", d.buf, strerror(errno)); |
973 | if (st.st_mode & 0077) |
974 | die(1, "parent directory `%s' has group or world access", d.buf); |
975 | } |
976 | } |
977 | |
978 | /* --- Initialize the socket --- */ |
979 | |
980 | { |
981 | int n = 5; |
982 | int e; |
983 | |
984 | umask(0077); |
985 | again: |
986 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
987 | die(1, "couldn't create socket: %s", strerror(errno)); |
988 | if (bind(fd, (struct sockaddr *)sun, sz) < 0) { |
989 | e = errno; |
990 | if (errno != EADDRINUSE) |
991 | die(1, "couldn't bind to address: %s", strerror(e)); |
992 | if (!n) |
993 | die(1, "too many retries; giving up"); |
994 | n--; |
995 | if (connect(fd, (struct sockaddr *)sun, sz)) { |
996 | if (errno != ECONNREFUSED) |
997 | die(1, "couldn't bind to address: %s", strerror(e)); |
998 | if (verbose) |
999 | log("stale socket found; removing it"); |
1000 | unlink(sun->sun_path); |
1001 | close(fd); |
1002 | } else { |
1003 | if (verbose) |
1004 | log("server already running; shutting it down"); |
1005 | write(fd, "QUIT\n", 5); |
1006 | sleep(1); |
1007 | close(fd); |
1008 | } |
1009 | goto again; |
1010 | } |
1011 | chmod(sun->sun_path, 0600); |
1012 | fdflags(fd, O_NONBLOCK, O_NONBLOCK, FD_CLOEXEC, FD_CLOEXEC); |
1013 | if (listen(fd, 5)) |
1014 | die(1, "couldn't listen on socket: %s", strerror(errno)); |
1015 | } |
1016 | |
1017 | /* --- Set up the rest of the server --- */ |
1018 | |
1019 | { |
1020 | static sel_file serv; |
1021 | sockpath = sun->sun_path; |
1022 | atexit(unlinksocket); |
1023 | sel_initfile(&sel, &serv, fd, SEL_READ, pixserv_accept, 0); |
1024 | sel_addfile(&serv); |
1025 | } |
1026 | } |
1027 | |
1028 | /*----- Client support code -----------------------------------------------*/ |
1029 | |
1030 | /* --- Variables --- */ |
1031 | |
6a2d21e4 |
1032 | static selbuf c_server, c_client; |
1033 | static c_flags = 0; |
1034 | enum { cf_uclose = 1, cf_sclose = 2 }; |
069c185c |
1035 | |
1036 | /* --- Line handler functions --- */ |
1037 | |
1038 | static void c_uline(char *s, void *p) |
1039 | { |
1040 | size_t sz; |
6a2d21e4 |
1041 | if (!s) { |
1042 | selbuf_destroy(&c_client); |
1043 | shutdown(c_server.reader.fd, 1); |
1044 | c_flags |= cf_uclose; |
1045 | } else { |
1046 | sz = strlen(s); |
1047 | s[sz++] = '\n'; |
1048 | write(c_server.reader.fd, s, sz); |
1049 | } |
069c185c |
1050 | } |
1051 | |
1052 | static void c_sline(char *s, void *p) |
1053 | { |
1054 | if (!s) { |
6a2d21e4 |
1055 | selbuf_destroy(&c_server); |
1056 | if (!(c_flags & cf_uclose)) { |
069c185c |
1057 | moan("server closed the connection"); |
6a2d21e4 |
1058 | selbuf_destroy(&c_client); |
1059 | } |
069c185c |
1060 | exit(0); |
6a2d21e4 |
1061 | } else |
1062 | puts(s); |
069c185c |
1063 | } |
1064 | |
1065 | /* --- @pix_client@ --- * |
1066 | * |
1067 | * Arguments: @struct sockaddr_un *sun@ = pointer to socket address |
1068 | * @size_t sz@ = size of socket address |
1069 | * @char *argv[]@ = pointer to arguments to send |
1070 | * |
1071 | * Returns: --- |
1072 | * |
1073 | * Use: Performs client-side actions for the passphrase pixie. |
1074 | */ |
1075 | |
1076 | static void pix_client(struct sockaddr_un *sun, size_t sz, char *argv[]) |
1077 | { |
1078 | int fd; |
1079 | |
1080 | /* --- Open the socket --- */ |
1081 | |
1082 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) |
1083 | die(1, "couldn't create socket: %s", strerror(errno)); |
1084 | if (connect(fd, (struct sockaddr *)sun, sz)) |
1085 | die(1, "couldn't connect to server: %s", strerror(errno)); |
1086 | selbuf_init(&c_server, &sel, fd, c_sline, 0); |
1087 | |
1088 | /* --- If there are any arguments, turn them into a string --- */ |
1089 | |
1090 | if (!*argv) |
1091 | selbuf_init(&c_client, &sel, STDIN_FILENO, c_uline, 0); |
1092 | else { |
1093 | dstr d = DSTR_INIT; |
1094 | DPUTS(&d, *argv++); |
1095 | while (*argv) { |
1096 | DPUTC(&d, ' '); |
1097 | DPUTS(&d, *argv++); |
1098 | } |
1099 | DPUTC(&d, '\n'); |
1100 | write(fd, d.buf, d.len); |
1101 | shutdown(fd, 1); |
1102 | dstr_destroy(&d); |
1103 | } |
1104 | |
1105 | /* --- And repeat --- */ |
1106 | |
1107 | for (;;) |
1108 | sel_select(&sel); |
1109 | } |
1110 | |
1111 | /*----- Main code ---------------------------------------------------------*/ |
1112 | |
1113 | /* --- @help@, @version@, @usage@ --- * |
1114 | * |
1115 | * Arguments: @FILE *fp@ = stream to write on |
1116 | * |
1117 | * Returns: --- |
1118 | * |
1119 | * Use: Emit helpful messages. |
1120 | */ |
1121 | |
1122 | static void usage(FILE *fp) |
1123 | { |
1124 | pquis(fp, "\ |
1125 | Usage:\n\ |
1126 | $ [-qvidl] [-c command] [-t timeout] [-s socket]\n\ |
1127 | $ [-s socket] -C [command args...]\n\ |
1128 | "); |
1129 | } |
1130 | |
1131 | static void version(FILE *fp) |
1132 | { |
1133 | pquis(fp, "$, Catacomb version " VERSION "\n"); |
1134 | } |
1135 | |
1136 | static void help(FILE *fp) |
1137 | { |
1138 | version(fp); |
1139 | fputc('\n', fp); |
1140 | usage(fp); |
1141 | pquis(fp, "\n\ |
1142 | The Catacomb passphrase pixie collects and caches passphrases used to\n\ |
1143 | protect important keys. Options provided:\n\ |
1144 | \n\ |
1145 | -h, --help Show this help text.\n\ |
1146 | -V, --version Show the program's version number.\n\ |
1147 | -u, --usage Show a (very) terse usage summary.\n\ |
1148 | \n\ |
1149 | -C, --client Connect to a running pixie as a client.\n\ |
1150 | \n\ |
1151 | -q, --quiet Emit fewer log messages.\n\ |
1152 | -v, --version Emit more log messages.\n\ |
1153 | -s, --socket=FILE Name the pixie's socket.\n\ |
1154 | -c, --command=COMMAND Shell command to read a passphrase.\n\ |
6a2d21e4 |
1155 | -f, --fetch Fetch passphrases from the terminal.\n\ |
069c185c |
1156 | -t, --timeout=TIMEOUT Length of time to retain a passphrase in memory.\n\ |
1157 | -i, --interactive Allow commands to be typed interactively.\n\ |
6a2d21e4 |
1158 | -d, --daemon Fork into the background after initialization.\n\ |
069c185c |
1159 | -l, --syslog Emit log messages to the system log.\n\ |
1160 | \n\ |
1161 | The COMMAND may contain `%m' and `%t' markers which are replaced by a\n\ |
1162 | prompt message and the passphrase tag respectively. The TIMEOUT is an\n\ |
1163 | integer, optionally followed by `d', `h', `m' or `s' to specify units of\n\ |
1164 | days, hours, minutes or seconds respectively.\n\ |
1165 | \n\ |
1166 | In client mode, if a command is specified on the command line, it is sent\n\ |
1167 | to the running server; otherwise the program reads requests from stdin.\n\ |
1168 | Responses from the pixie are written to stdout. Send a HELP request for\n\ |
1169 | a quick summary of the pixie communication protocol.\n\ |
1170 | "); |
1171 | } |
1172 | |
1173 | /* --- @main@ --- * |
1174 | * |
1175 | * Arguments: @int argc@ = number of arguments |
1176 | * @char *argv[]@ = vector of argument values |
1177 | * |
1178 | * Returns: Zero if OK. |
1179 | * |
1180 | * Use: Main program. Listens on a socket and responds with a PGP |
1181 | * passphrase when asked. |
1182 | */ |
1183 | |
1184 | int main(int argc, char *argv[]) |
1185 | { |
1186 | char *path = 0; |
1187 | struct sockaddr_un *sun; |
1188 | size_t sz; |
1189 | unsigned f = 0; |
1190 | |
1191 | enum { |
1192 | f_bogus = 1, |
1193 | f_client = 2, |
1194 | f_stdin = 4, |
1195 | f_daemon = 8, |
1196 | f_syslog = 16 |
1197 | }; |
1198 | |
1199 | /* --- Initialize libraries --- */ |
1200 | |
1201 | ego(argv[0]); |
1202 | sub_init(); |
1203 | |
1204 | /* --- Set up the locked memory area --- */ |
1205 | |
6a2d21e4 |
1206 | l_init(&lm, 16384); |
069c185c |
1207 | setuid(getuid()); |
1208 | |
1209 | /* --- Parse command line arguments --- */ |
1210 | |
1211 | for (;;) { |
1212 | static struct option opts[] = { |
1213 | |
1214 | /* --- Standard GNUy help options --- */ |
1215 | |
1216 | { "help", 0, 0, 'h' }, |
1217 | { "version", 0, 0, 'V' }, |
1218 | { "usage", 0, 0, 'u' }, |
1219 | |
1220 | /* --- Other options --- */ |
1221 | |
1222 | { "quiet", 0, 0, 'q' }, |
1223 | { "verbose", 0, 0, 'v' }, |
1224 | { "client", 0, 0, 'C' }, |
1225 | { "socket", OPTF_ARGREQ, 0, 's' }, |
1226 | { "command", OPTF_ARGREQ, 0, 'c' }, |
6a2d21e4 |
1227 | { "fetch", 0, 0, 'f' }, |
069c185c |
1228 | { "timeout", OPTF_ARGREQ, 0, 't' }, |
1229 | { "interactive", 0, 0, 'i' }, |
1230 | { "stdin", 0, 0, 'i' }, |
1231 | { "daemon", 0, 0, 'd' }, |
1232 | { "log", 0, 0, 'l' }, |
1233 | { "syslog", 0, 0, 'l' }, |
1234 | |
1235 | /* --- Magic terminator --- */ |
1236 | |
1237 | { 0, 0, 0, 0 } |
1238 | }; |
1239 | |
6a2d21e4 |
1240 | int i = mdwopt(argc, argv, "hVuqvCs:c:ft:idl", opts, 0, 0, 0); |
069c185c |
1241 | if (i < 0) |
1242 | break; |
1243 | |
1244 | switch (i) { |
1245 | |
1246 | /* --- GNUy help options --- */ |
1247 | |
1248 | case 'h': |
1249 | help(stdout); |
1250 | exit(0); |
1251 | case 'V': |
1252 | version(stdout); |
1253 | exit(0); |
1254 | case 'u': |
1255 | usage(stdout); |
1256 | exit(0); |
1257 | |
1258 | /* --- Other interesting things --- */ |
1259 | |
1260 | case 'q': |
1261 | if (verbose) |
1262 | verbose--; |
1263 | break; |
1264 | case 'v': |
1265 | verbose++; |
1266 | break; |
1267 | case 'C': |
1268 | f |= f_client; |
1269 | break; |
1270 | case 's': |
1271 | path = optarg; |
1272 | break; |
1273 | case 't': |
1274 | if ((timeout = pixserv_timeout(optarg)) == 0) |
1275 | die(1, "bad timeout `%s'", optarg); |
1276 | break; |
1277 | case 'c': |
1278 | command = optarg; |
6a2d21e4 |
1279 | flags |= F_FETCH; |
1280 | break; |
1281 | case 'f': |
1282 | flags |= F_FETCH; |
069c185c |
1283 | break; |
1284 | case 'i': |
1285 | f |= f_stdin; |
1286 | break; |
1287 | case 'd': |
1288 | f |= f_daemon; |
1289 | break; |
1290 | case 'l': |
1291 | f |= f_syslog; |
1292 | break; |
1293 | |
1294 | /* --- Something else --- */ |
1295 | |
1296 | default: |
1297 | f |= f_bogus; |
1298 | break; |
1299 | } |
1300 | } |
1301 | |
1302 | if (f & f_bogus || (optind < argc && !(f & f_client))) { |
1303 | usage(stderr); |
1304 | exit(1); |
1305 | } |
1306 | |
1307 | /* --- Set up the socket address --- */ |
1308 | |
1309 | sun = pixie_address(path, &sz); |
1310 | |
1311 | /* --- Initialize selectory --- */ |
1312 | |
1313 | sel_init(&sel); |
1314 | signal(SIGPIPE, SIG_IGN); |
1315 | |
1316 | /* --- Be a client if a client's wanted --- */ |
1317 | |
1318 | if (f & f_client) |
1319 | pix_client(sun, sz, argv + optind); |
1320 | |
1321 | /* --- Open the syslog if requested --- */ |
1322 | |
1323 | if (f & f_syslog) { |
1324 | flags |= F_SYSLOG; |
1325 | openlog(QUIS, 0, LOG_DAEMON); |
1326 | } |
1327 | |
1328 | /* --- Check on the locked memory area --- */ |
1329 | |
1330 | { |
1331 | dstr d = DSTR_INIT; |
1332 | int rc = l_report(&lm, &d); |
1333 | if (rc < 0) |
1334 | die(EXIT_FAILURE, d.buf); |
1335 | else if (rc && verbose) { |
1336 | log(d.buf); |
1337 | log("couldn't lock passphrase buffer"); |
1338 | } |
1339 | dstr_destroy(&d); |
6a2d21e4 |
1340 | arena_setsecure(&lm.a); |
069c185c |
1341 | } |
1342 | |
1343 | /* --- Set signal behaviours --- */ |
1344 | |
1345 | { |
1346 | static sig sigint, sigterm, sigquit, sighup; |
1347 | sig_init(&sel); |
1348 | sig_add(&sigint, SIGINT, pix_sigdie, 0); |
1349 | sig_add(&sigterm, SIGTERM, pix_sigdie, 0); |
1350 | sig_add(&sigquit, SIGQUIT, pix_sigflush, 0); |
1351 | sig_add(&sighup, SIGHUP, pix_sigflush, 0); |
1352 | } |
1353 | |
1354 | /* --- Set up the server --- */ |
1355 | |
1356 | pix_setup(sun, sz); |
6a2d21e4 |
1357 | if (f & f_stdin) { |
1358 | pixserv *px = pixserv_create(STDIN_FILENO, STDOUT_FILENO); |
1359 | sel_rmtimer(&px->timer); |
1360 | px->f |= px_stdin; |
1361 | } |
069c185c |
1362 | |
1363 | /* --- Fork into the background if requested --- */ |
1364 | |
1365 | if (f & f_daemon) { |
1366 | pid_t kid; |
1367 | |
1368 | if (((f & f_stdin) && |
1369 | (isatty(STDIN_FILENO) || isatty(STDOUT_FILENO))) || |
6a2d21e4 |
1370 | (!command && (flags & F_FETCH))) |
069c185c |
1371 | die(1, "can't become a daemon if terminal required"); |
1372 | |
1373 | if ((kid = fork()) < 0) |
1374 | die(1, "fork failed: %s", strerror(errno)); |
1375 | if (kid) |
1376 | _exit(0); |
1377 | #ifdef TIOCNOTTY |
1378 | { |
1379 | int fd; |
1380 | if ((fd = open("/dev/tty", O_RDONLY)) >= 0) { |
1381 | ioctl(fd, TIOCNOTTY); |
1382 | close(fd); |
1383 | } |
1384 | } |
1385 | #endif |
1386 | setsid(); |
1387 | |
1388 | if (fork() > 0) |
1389 | _exit(0); |
1390 | } |
1391 | |
2b2d07ca |
1392 | if (verbose) |
1393 | log("initialized ok"); |
069c185c |
1394 | for (;;) |
1395 | sel_select(&sel); |
1396 | return (0); |
1397 | } |
1398 | |
1399 | /*----- That's all, folks -------------------------------------------------*/ |