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ec863ba6 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdbool.h> | |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <sys/socket.h> | |
26 | #include <sys/un.h> | |
27 | #include <stddef.h> | |
28 | #include <sys/poll.h> | |
29 | #include <sys/inotify.h> | |
30 | #include <unistd.h> | |
31 | #include <getopt.h> | |
b9ba604e | 32 | #include <sys/signalfd.h> |
7af53310 | 33 | #include <fcntl.h> |
ec863ba6 LP |
34 | |
35 | #include "util.h" | |
36 | #include "conf-parser.h" | |
37 | #include "utmp-wtmp.h" | |
e5ebf783 | 38 | #include "socket-util.h" |
7f4e0805 | 39 | #include "ask-password-api.h" |
21bc923a | 40 | #include "strv.h" |
ec863ba6 LP |
41 | |
42 | static enum { | |
43 | ACTION_LIST, | |
44 | ACTION_QUERY, | |
45 | ACTION_WATCH, | |
46 | ACTION_WALL | |
47 | } arg_action = ACTION_QUERY; | |
48 | ||
e5ebf783 | 49 | static bool arg_plymouth = false; |
0cf84693 | 50 | static bool arg_console = false; |
e5ebf783 | 51 | |
21bc923a LP |
52 | static int ask_password_plymouth( |
53 | const char *message, | |
54 | usec_t until, | |
55 | const char *flag_file, | |
56 | bool accept_cached, | |
57 | char ***_passphrases) { | |
58 | ||
e5ebf783 LP |
59 | int fd = -1, notify = -1; |
60 | union sockaddr_union sa; | |
61 | char *packet = NULL; | |
62 | ssize_t k; | |
63 | int r, n; | |
64 | struct pollfd pollfd[2]; | |
65 | char buffer[LINE_MAX]; | |
66 | size_t p = 0; | |
67 | enum { | |
68 | POLL_SOCKET, | |
69 | POLL_INOTIFY | |
70 | }; | |
71 | ||
21bc923a LP |
72 | assert(_passphrases); |
73 | ||
e5ebf783 LP |
74 | if (flag_file) { |
75 | if ((notify = inotify_init1(IN_CLOEXEC|IN_NONBLOCK)) < 0) { | |
76 | r = -errno; | |
77 | goto finish; | |
78 | } | |
79 | ||
80 | if (inotify_add_watch(notify, flag_file, IN_ATTRIB /* for the link count */) < 0) { | |
81 | r = -errno; | |
82 | goto finish; | |
83 | } | |
84 | } | |
85 | ||
86 | if ((fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0)) < 0) { | |
87 | r = -errno; | |
88 | goto finish; | |
89 | } | |
90 | ||
91 | zero(sa); | |
92 | sa.sa.sa_family = AF_UNIX; | |
96707269 LP |
93 | strncpy(sa.un.sun_path+1, "/org/freedesktop/plymouthd", sizeof(sa.un.sun_path)-1); |
94 | if (connect(fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + 1 + strlen(sa.un.sun_path+1)) < 0) { | |
c0f9c7da | 95 | log_error("Failed to connect to Plymouth: %m"); |
e5ebf783 LP |
96 | r = -errno; |
97 | goto finish; | |
98 | } | |
99 | ||
21bc923a LP |
100 | if (accept_cached) { |
101 | packet = strdup("c"); | |
102 | n = 1; | |
103 | } else | |
104 | asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n); | |
105 | ||
106 | if (!packet) { | |
e5ebf783 LP |
107 | r = -ENOMEM; |
108 | goto finish; | |
109 | } | |
110 | ||
111 | if ((k = loop_write(fd, packet, n+1, true)) != n+1) { | |
112 | r = k < 0 ? (int) k : -EIO; | |
113 | goto finish; | |
114 | } | |
115 | ||
116 | zero(pollfd); | |
117 | pollfd[POLL_SOCKET].fd = fd; | |
118 | pollfd[POLL_SOCKET].events = POLLIN; | |
119 | pollfd[POLL_INOTIFY].fd = notify; | |
120 | pollfd[POLL_INOTIFY].events = POLLIN; | |
121 | ||
122 | for (;;) { | |
123 | int sleep_for = -1, j; | |
124 | ||
125 | if (until > 0) { | |
126 | usec_t y; | |
127 | ||
128 | y = now(CLOCK_MONOTONIC); | |
129 | ||
130 | if (y > until) { | |
ccc80078 | 131 | r = -ETIME; |
e5ebf783 LP |
132 | goto finish; |
133 | } | |
134 | ||
135 | sleep_for = (int) ((until - y) / USEC_PER_MSEC); | |
136 | } | |
137 | ||
138 | if (flag_file) | |
139 | if (access(flag_file, F_OK) < 0) { | |
140 | r = -errno; | |
141 | goto finish; | |
142 | } | |
143 | ||
144 | if ((j = poll(pollfd, notify > 0 ? 2 : 1, sleep_for)) < 0) { | |
145 | ||
146 | if (errno == EINTR) | |
147 | continue; | |
148 | ||
149 | r = -errno; | |
150 | goto finish; | |
151 | } else if (j == 0) { | |
ccc80078 | 152 | r = -ETIME; |
e5ebf783 LP |
153 | goto finish; |
154 | } | |
155 | ||
156 | if (notify > 0 && pollfd[POLL_INOTIFY].revents != 0) | |
157 | flush_fd(notify); | |
158 | ||
159 | if (pollfd[POLL_SOCKET].revents == 0) | |
160 | continue; | |
161 | ||
162 | if ((k = read(fd, buffer + p, sizeof(buffer) - p)) <= 0) { | |
163 | r = k < 0 ? -errno : -EIO; | |
164 | goto finish; | |
165 | } | |
166 | ||
167 | p += k; | |
168 | ||
169 | if (p < 1) | |
170 | continue; | |
171 | ||
172 | if (buffer[0] == 5) { | |
21bc923a LP |
173 | |
174 | if (accept_cached) { | |
175 | /* Hmm, first try with cached | |
176 | * passwords failed, so let's retry | |
177 | * with a normal password request */ | |
178 | free(packet); | |
179 | packet = NULL; | |
180 | ||
181 | if (asprintf(&packet, "*\002%c%s%n", (int) (strlen(message) + 1), message, &n) < 0) { | |
182 | r = -ENOMEM; | |
183 | goto finish; | |
184 | } | |
185 | ||
186 | if ((k = loop_write(fd, packet, n+1, true)) != n+1) { | |
187 | r = k < 0 ? (int) k : -EIO; | |
188 | goto finish; | |
189 | } | |
190 | ||
191 | accept_cached = false; | |
192 | p = 0; | |
193 | continue; | |
194 | } | |
195 | ||
e5ebf783 LP |
196 | /* No password, because UI not shown */ |
197 | r = -ENOENT; | |
198 | goto finish; | |
199 | ||
21bc923a | 200 | } else if (buffer[0] == 2 || buffer[0] == 9) { |
e5ebf783 | 201 | uint32_t size; |
21bc923a | 202 | char **l; |
e5ebf783 | 203 | |
21bc923a | 204 | /* One ore more answers */ |
e5ebf783 LP |
205 | if (p < 5) |
206 | continue; | |
207 | ||
208 | memcpy(&size, buffer+1, sizeof(size)); | |
bb53abeb | 209 | size = le32toh(size); |
e5ebf783 LP |
210 | if (size+5 > sizeof(buffer)) { |
211 | r = -EIO; | |
212 | goto finish; | |
213 | } | |
214 | ||
215 | if (p-5 < size) | |
216 | continue; | |
217 | ||
21bc923a | 218 | if (!(l = strv_parse_nulstr(buffer + 5, size))) { |
e5ebf783 LP |
219 | r = -ENOMEM; |
220 | goto finish; | |
221 | } | |
222 | ||
21bc923a | 223 | *_passphrases = l; |
e5ebf783 | 224 | break; |
21bc923a | 225 | |
e5ebf783 LP |
226 | } else { |
227 | /* Unknown packet */ | |
228 | r = -EIO; | |
229 | goto finish; | |
230 | } | |
231 | } | |
232 | ||
233 | r = 0; | |
234 | ||
235 | finish: | |
236 | if (notify >= 0) | |
237 | close_nointr_nofail(notify); | |
238 | ||
239 | if (fd >= 0) | |
240 | close_nointr_nofail(fd); | |
241 | ||
242 | free(packet); | |
243 | ||
244 | return r; | |
245 | } | |
246 | ||
0ddf1d3a | 247 | static int parse_password(const char *filename, char **wall) { |
ec863ba6 LP |
248 | char *socket_name = NULL, *message = NULL, *packet = NULL; |
249 | uint64_t not_after = 0; | |
250 | unsigned pid = 0; | |
251 | int socket_fd = -1; | |
21bc923a | 252 | bool accept_cached = false; |
ec863ba6 | 253 | |
f975e971 LP |
254 | const ConfigTableItem items[] = { |
255 | { "Ask", "Socket", config_parse_string, 0, &socket_name }, | |
256 | { "Ask", "NotAfter", config_parse_uint64, 0, ¬_after }, | |
257 | { "Ask", "Message", config_parse_string, 0, &message }, | |
258 | { "Ask", "PID", config_parse_unsigned, 0, &pid }, | |
259 | { "Ask", "AcceptCached", config_parse_bool, 0, &accept_cached }, | |
260 | { NULL, NULL, NULL, 0, NULL } | |
ec863ba6 LP |
261 | }; |
262 | ||
263 | FILE *f; | |
264 | int r; | |
ec863ba6 LP |
265 | |
266 | assert(filename); | |
267 | ||
f975e971 LP |
268 | f = fopen(filename, "re"); |
269 | if (!f) { | |
ec863ba6 LP |
270 | if (errno == ENOENT) |
271 | return 0; | |
272 | ||
273 | log_error("open(%s): %m", filename); | |
274 | return -errno; | |
275 | } | |
276 | ||
f975e971 LP |
277 | r = config_parse(filename, f, NULL, config_item_table_lookup, (void*) items, true, NULL); |
278 | if (r < 0) { | |
ec863ba6 LP |
279 | log_error("Failed to parse password file %s: %s", filename, strerror(-r)); |
280 | goto finish; | |
281 | } | |
282 | ||
7dcda352 | 283 | if (!socket_name) { |
ec863ba6 LP |
284 | log_error("Invalid password file %s", filename); |
285 | r = -EBADMSG; | |
286 | goto finish; | |
287 | } | |
288 | ||
7dcda352 LP |
289 | if (not_after > 0) { |
290 | if (now(CLOCK_MONOTONIC) > not_after) { | |
291 | r = 0; | |
292 | goto finish; | |
293 | } | |
ec863ba6 LP |
294 | } |
295 | ||
ded80335 LP |
296 | if (pid > 0 && |
297 | kill(pid, 0) < 0 && | |
298 | errno == ESRCH) { | |
299 | r = 0; | |
300 | goto finish; | |
301 | } | |
302 | ||
ec863ba6 LP |
303 | if (arg_action == ACTION_LIST) |
304 | printf("'%s' (PID %u)\n", message, pid); | |
305 | else if (arg_action == ACTION_WALL) { | |
0ddf1d3a | 306 | char *_wall; |
ec863ba6 | 307 | |
0ddf1d3a LP |
308 | if (asprintf(&_wall, |
309 | "%s%sPassword entry required for \'%s\' (PID %u).\r\n" | |
9d3e691e | 310 | "Please enter password with the systemd-tty-ask-password-agent tool!", |
0ddf1d3a LP |
311 | *wall ? *wall : "", |
312 | *wall ? "\r\n\r\n" : "", | |
ec863ba6 LP |
313 | message, |
314 | pid) < 0) { | |
315 | log_error("Out of memory"); | |
316 | r = -ENOMEM; | |
317 | goto finish; | |
318 | } | |
319 | ||
0ddf1d3a LP |
320 | free(*wall); |
321 | *wall = _wall; | |
ec863ba6 LP |
322 | } else { |
323 | union { | |
324 | struct sockaddr sa; | |
325 | struct sockaddr_un un; | |
326 | } sa; | |
3414abee | 327 | size_t packet_length = 0; |
ec863ba6 LP |
328 | |
329 | assert(arg_action == ACTION_QUERY || | |
330 | arg_action == ACTION_WATCH); | |
331 | ||
332 | if (access(socket_name, W_OK) < 0) { | |
333 | ||
334 | if (arg_action == ACTION_QUERY) | |
335 | log_info("Not querying '%s' (PID %u), lacking privileges.", message, pid); | |
336 | ||
337 | r = 0; | |
338 | goto finish; | |
339 | } | |
340 | ||
21bc923a | 341 | if (arg_plymouth) { |
3414abee | 342 | char **passwords = NULL; |
21bc923a LP |
343 | |
344 | if ((r = ask_password_plymouth(message, not_after, filename, accept_cached, &passwords)) >= 0) { | |
345 | char **p; | |
346 | ||
347 | packet_length = 1; | |
348 | STRV_FOREACH(p, passwords) | |
349 | packet_length += strlen(*p) + 1; | |
350 | ||
351 | if (!(packet = new(char, packet_length))) | |
352 | r = -ENOMEM; | |
353 | else { | |
354 | char *d; | |
355 | ||
356 | packet[0] = '+'; | |
357 | d = packet+1; | |
358 | ||
359 | STRV_FOREACH(p, passwords) | |
360 | d = stpcpy(d, *p) + 1; | |
361 | } | |
362 | } | |
363 | ||
364 | } else { | |
0cf84693 | 365 | int tty_fd = -1; |
21bc923a | 366 | char *password; |
0cf84693 LP |
367 | |
368 | if (arg_console) | |
369 | if ((tty_fd = acquire_terminal("/dev/console", false, false, false)) < 0) { | |
370 | r = tty_fd; | |
371 | goto finish; | |
372 | } | |
373 | ||
e5ebf783 LP |
374 | r = ask_password_tty(message, not_after, filename, &password); |
375 | ||
0cf84693 LP |
376 | if (arg_console) { |
377 | close_nointr_nofail(tty_fd); | |
378 | release_terminal(); | |
379 | } | |
21bc923a | 380 | |
9726f9ff LP |
381 | if (r >= 0) { |
382 | packet_length = 1+strlen(password)+1; | |
383 | if (!(packet = new(char, packet_length))) | |
384 | r = -ENOMEM; | |
385 | else { | |
386 | packet[0] = '+'; | |
387 | strcpy(packet+1, password); | |
388 | } | |
21bc923a | 389 | |
5ba7b871 LP |
390 | free(password); |
391 | } | |
0cf84693 LP |
392 | } |
393 | ||
446f0046 LP |
394 | if (r == -ETIME || r == -ENOENT) { |
395 | /* If the query went away, that's OK */ | |
396 | r = 0; | |
397 | goto finish; | |
398 | } | |
399 | ||
e5ebf783 LP |
400 | if (r < 0) { |
401 | log_error("Failed to query password: %s", strerror(-r)); | |
ec863ba6 LP |
402 | goto finish; |
403 | } | |
404 | ||
ec863ba6 LP |
405 | if ((socket_fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) { |
406 | log_error("socket(): %m"); | |
407 | r = -errno; | |
408 | goto finish; | |
409 | } | |
410 | ||
411 | zero(sa); | |
412 | sa.un.sun_family = AF_UNIX; | |
413 | strncpy(sa.un.sun_path, socket_name, sizeof(sa.un.sun_path)); | |
414 | ||
21bc923a | 415 | if (sendto(socket_fd, packet, packet_length, MSG_NOSIGNAL, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(socket_name)) < 0) { |
ec863ba6 LP |
416 | log_error("Failed to send: %m"); |
417 | r = -errno; | |
418 | goto finish; | |
419 | } | |
420 | } | |
421 | ||
422 | finish: | |
423 | fclose(f); | |
424 | ||
425 | if (socket_fd >= 0) | |
426 | close_nointr_nofail(socket_fd); | |
427 | ||
428 | free(packet); | |
429 | free(socket_name); | |
430 | free(message); | |
431 | ||
432 | return r; | |
433 | } | |
434 | ||
0cf84693 | 435 | static int wall_tty_block(void) { |
7af53310 | 436 | char *p; |
fc116c6a LP |
437 | int fd, r; |
438 | dev_t devnr; | |
7af53310 | 439 | |
4d6d6518 LP |
440 | r = get_ctty_devnr(0, &devnr); |
441 | if (r < 0) | |
fc116c6a | 442 | return -r; |
7af53310 | 443 | |
2b583ce6 | 444 | if (asprintf(&p, "/run/systemd/ask-password-block/%u:%u", major(devnr), minor(devnr)) < 0) |
7af53310 LP |
445 | return -ENOMEM; |
446 | ||
447 | mkdir_parents(p, 0700); | |
448 | mkfifo(p, 0600); | |
449 | ||
450 | fd = open(p, O_RDONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); | |
451 | free(p); | |
452 | ||
453 | if (fd < 0) | |
454 | return -errno; | |
455 | ||
456 | return fd; | |
457 | } | |
458 | ||
0cf84693 | 459 | static bool wall_tty_match(const char *path) { |
fc116c6a | 460 | int fd, k; |
7af53310 | 461 | char *p; |
fc116c6a LP |
462 | struct stat st; |
463 | ||
464 | if (path_is_absolute(path)) | |
465 | k = lstat(path, &st); | |
466 | else { | |
467 | if (asprintf(&p, "/dev/%s", path) < 0) | |
468 | return true; | |
469 | ||
470 | k = lstat(p, &st); | |
471 | free(p); | |
472 | } | |
473 | ||
474 | if (k < 0) | |
475 | return true; | |
476 | ||
477 | if (!S_ISCHR(st.st_mode)) | |
478 | return true; | |
7af53310 LP |
479 | |
480 | /* We use named pipes to ensure that wall messages suggesting | |
481 | * password entry are not printed over password prompts | |
482 | * already shown. We use the fact here that opening a pipe in | |
483 | * non-blocking mode for write-only will succeed only if | |
484 | * there's some writer behind it. Using pipes has the | |
485 | * advantage that the block will automatically go away if the | |
486 | * process dies. */ | |
487 | ||
2b583ce6 | 488 | if (asprintf(&p, "/run/systemd/ask-password-block/%u:%u", major(st.st_rdev), minor(st.st_rdev)) < 0) |
7af53310 LP |
489 | return true; |
490 | ||
491 | fd = open(p, O_WRONLY|O_CLOEXEC|O_NONBLOCK|O_NOCTTY); | |
492 | free(p); | |
493 | ||
494 | if (fd < 0) | |
495 | return true; | |
496 | ||
497 | /* What, we managed to open the pipe? Then this tty is filtered. */ | |
498 | close_nointr_nofail(fd); | |
499 | return false; | |
500 | } | |
501 | ||
ec863ba6 LP |
502 | static int show_passwords(void) { |
503 | DIR *d; | |
504 | struct dirent *de; | |
505 | int r = 0; | |
506 | ||
2b583ce6 | 507 | if (!(d = opendir("/run/systemd/ask-password"))) { |
ec863ba6 LP |
508 | if (errno == ENOENT) |
509 | return 0; | |
510 | ||
511 | log_error("opendir(): %m"); | |
512 | return -errno; | |
513 | } | |
514 | ||
515 | while ((de = readdir(d))) { | |
516 | char *p; | |
517 | int q; | |
0ddf1d3a | 518 | char *wall; |
ec863ba6 | 519 | |
1a6f4df6 LP |
520 | /* We only support /dev on tmpfs, hence we can rely on |
521 | * d_type to be reliable */ | |
522 | ||
ec863ba6 LP |
523 | if (de->d_type != DT_REG) |
524 | continue; | |
525 | ||
526 | if (ignore_file(de->d_name)) | |
527 | continue; | |
528 | ||
529 | if (!startswith(de->d_name, "ask.")) | |
530 | continue; | |
531 | ||
2b583ce6 | 532 | if (!(p = strappend("/run/systemd/ask-password/", de->d_name))) { |
ec863ba6 LP |
533 | log_error("Out of memory"); |
534 | r = -ENOMEM; | |
535 | goto finish; | |
536 | } | |
537 | ||
0ddf1d3a LP |
538 | wall = NULL; |
539 | if ((q = parse_password(p, &wall)) < 0) | |
ec863ba6 LP |
540 | r = q; |
541 | ||
542 | free(p); | |
0ddf1d3a LP |
543 | |
544 | if (wall) { | |
0cf84693 | 545 | utmp_wall(wall, wall_tty_match); |
0ddf1d3a LP |
546 | free(wall); |
547 | } | |
ec863ba6 LP |
548 | } |
549 | ||
550 | finish: | |
551 | if (d) | |
552 | closedir(d); | |
553 | ||
554 | return r; | |
555 | } | |
556 | ||
557 | static int watch_passwords(void) { | |
b9ba604e LP |
558 | enum { |
559 | FD_INOTIFY, | |
560 | FD_SIGNAL, | |
561 | _FD_MAX | |
562 | }; | |
563 | ||
7af53310 | 564 | int notify = -1, signal_fd = -1, tty_block_fd = -1; |
b9ba604e LP |
565 | struct pollfd pollfd[_FD_MAX]; |
566 | sigset_t mask; | |
ec863ba6 LP |
567 | int r; |
568 | ||
0cf84693 | 569 | tty_block_fd = wall_tty_block(); |
7af53310 | 570 | |
2b583ce6 | 571 | mkdir_p("/run/systemd/ask-password", 0755); |
ec863ba6 LP |
572 | |
573 | if ((notify = inotify_init1(IN_CLOEXEC)) < 0) { | |
574 | r = -errno; | |
575 | goto finish; | |
576 | } | |
577 | ||
2b583ce6 | 578 | if (inotify_add_watch(notify, "/run/systemd/ask-password", IN_CLOSE_WRITE|IN_MOVED_TO) < 0) { |
ec863ba6 LP |
579 | r = -errno; |
580 | goto finish; | |
581 | } | |
582 | ||
b9ba604e LP |
583 | assert_se(sigemptyset(&mask) == 0); |
584 | sigset_add_many(&mask, SIGINT, SIGTERM, -1); | |
585 | assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0); | |
586 | ||
587 | if ((signal_fd = signalfd(-1, &mask, SFD_NONBLOCK|SFD_CLOEXEC)) < 0) { | |
588 | log_error("signalfd(): %m"); | |
589 | r = -errno; | |
590 | goto finish; | |
591 | } | |
592 | ||
ec863ba6 | 593 | zero(pollfd); |
b9ba604e LP |
594 | pollfd[FD_INOTIFY].fd = notify; |
595 | pollfd[FD_INOTIFY].events = POLLIN; | |
596 | pollfd[FD_SIGNAL].fd = signal_fd; | |
597 | pollfd[FD_SIGNAL].events = POLLIN; | |
ec863ba6 LP |
598 | |
599 | for (;;) { | |
600 | if ((r = show_passwords()) < 0) | |
0cf84693 | 601 | log_error("Failed to show password: %s", strerror(-r)); |
ec863ba6 | 602 | |
b9ba604e | 603 | if (poll(pollfd, _FD_MAX, -1) < 0) { |
ec863ba6 LP |
604 | |
605 | if (errno == EINTR) | |
606 | continue; | |
607 | ||
608 | r = -errno; | |
609 | goto finish; | |
610 | } | |
611 | ||
b9ba604e | 612 | if (pollfd[FD_INOTIFY].revents != 0) |
ec863ba6 | 613 | flush_fd(notify); |
b9ba604e LP |
614 | |
615 | if (pollfd[FD_SIGNAL].revents != 0) | |
616 | break; | |
ec863ba6 LP |
617 | } |
618 | ||
619 | r = 0; | |
620 | ||
621 | finish: | |
622 | if (notify >= 0) | |
623 | close_nointr_nofail(notify); | |
624 | ||
b9ba604e LP |
625 | if (signal_fd >= 0) |
626 | close_nointr_nofail(signal_fd); | |
627 | ||
7af53310 LP |
628 | if (tty_block_fd >= 0) |
629 | close_nointr_nofail(tty_block_fd); | |
630 | ||
ec863ba6 LP |
631 | return r; |
632 | } | |
633 | ||
634 | static int help(void) { | |
635 | ||
636 | printf("%s [OPTIONS...]\n\n" | |
637 | "Process system password requests.\n\n" | |
e5ebf783 LP |
638 | " -h --help Show this help\n" |
639 | " --list Show pending password requests\n" | |
640 | " --query Process pending password requests\n" | |
35b8ca3a HH |
641 | " --watch Continuously process password requests\n" |
642 | " --wall Continuously forward password requests to wall\n" | |
0cf84693 LP |
643 | " --plymouth Ask question with Plymouth instead of on TTY\n" |
644 | " --console Ask question on /dev/console instead of current TTY\n", | |
ec863ba6 LP |
645 | program_invocation_short_name); |
646 | ||
647 | return 0; | |
648 | } | |
649 | ||
650 | static int parse_argv(int argc, char *argv[]) { | |
651 | ||
652 | enum { | |
653 | ARG_LIST = 0x100, | |
654 | ARG_QUERY, | |
655 | ARG_WATCH, | |
656 | ARG_WALL, | |
0cf84693 LP |
657 | ARG_PLYMOUTH, |
658 | ARG_CONSOLE | |
ec863ba6 LP |
659 | }; |
660 | ||
661 | static const struct option options[] = { | |
e5ebf783 LP |
662 | { "help", no_argument, NULL, 'h' }, |
663 | { "list", no_argument, NULL, ARG_LIST }, | |
664 | { "query", no_argument, NULL, ARG_QUERY }, | |
665 | { "watch", no_argument, NULL, ARG_WATCH }, | |
666 | { "wall", no_argument, NULL, ARG_WALL }, | |
667 | { "plymouth", no_argument, NULL, ARG_PLYMOUTH }, | |
0cf84693 | 668 | { "console", no_argument, NULL, ARG_CONSOLE }, |
e5ebf783 | 669 | { NULL, 0, NULL, 0 } |
ec863ba6 LP |
670 | }; |
671 | ||
672 | int c; | |
673 | ||
674 | assert(argc >= 0); | |
675 | assert(argv); | |
676 | ||
677 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
678 | ||
679 | switch (c) { | |
680 | ||
681 | case 'h': | |
682 | help(); | |
683 | return 0; | |
684 | ||
685 | case ARG_LIST: | |
686 | arg_action = ACTION_LIST; | |
687 | break; | |
688 | ||
689 | case ARG_QUERY: | |
690 | arg_action = ACTION_QUERY; | |
691 | break; | |
692 | ||
693 | case ARG_WATCH: | |
694 | arg_action = ACTION_WATCH; | |
695 | break; | |
696 | ||
697 | case ARG_WALL: | |
698 | arg_action = ACTION_WALL; | |
699 | break; | |
700 | ||
e5ebf783 LP |
701 | case ARG_PLYMOUTH: |
702 | arg_plymouth = true; | |
703 | break; | |
704 | ||
0cf84693 LP |
705 | case ARG_CONSOLE: |
706 | arg_console = true; | |
707 | break; | |
708 | ||
ec863ba6 LP |
709 | case '?': |
710 | return -EINVAL; | |
711 | ||
712 | default: | |
713 | log_error("Unknown option code %c", c); | |
714 | return -EINVAL; | |
715 | } | |
716 | } | |
717 | ||
718 | if (optind != argc) { | |
719 | help(); | |
720 | return -EINVAL; | |
721 | } | |
722 | ||
723 | return 1; | |
724 | } | |
725 | ||
726 | int main(int argc, char *argv[]) { | |
727 | int r; | |
728 | ||
729 | log_parse_environment(); | |
730 | log_open(); | |
731 | ||
4c12626c LP |
732 | umask(0022); |
733 | ||
ec863ba6 LP |
734 | if ((r = parse_argv(argc, argv)) <= 0) |
735 | goto finish; | |
736 | ||
0cf84693 LP |
737 | if (arg_console) { |
738 | setsid(); | |
739 | release_terminal(); | |
740 | } | |
741 | ||
ec863ba6 LP |
742 | if (arg_action == ACTION_WATCH || |
743 | arg_action == ACTION_WALL) | |
744 | r = watch_passwords(); | |
745 | else | |
746 | r = show_passwords(); | |
747 | ||
96707269 LP |
748 | if (r < 0) |
749 | log_error("Error: %s", strerror(-r)); | |
750 | ||
ec863ba6 LP |
751 | finish: |
752 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
753 | } |