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7b17a7d7 LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2012 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 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 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <unistd.h> | |
25 | #include <fcntl.h> | |
858634ff | 26 | #include <getopt.h> |
7b17a7d7 LP |
27 | |
28 | #include <microhttpd.h> | |
29 | ||
f12be7e8 ZJS |
30 | #ifdef HAVE_GNUTLS |
31 | #include <gnutls/gnutls.h> | |
32 | #endif | |
33 | ||
7b17a7d7 LP |
34 | #include "sd-journal.h" |
35 | #include "sd-daemon.h" | |
a7edaadd | 36 | #include "sd-bus.h" |
2cf4172a LP |
37 | #include "log.h" |
38 | #include "util.h" | |
40ca29a1 | 39 | #include "bus-util.h" |
7b17a7d7 | 40 | #include "logs-show.h" |
e64690a8 | 41 | #include "microhttpd-util.h" |
858634ff | 42 | #include "build.h" |
a860325e | 43 | #include "fileio.h" |
2cf4172a | 44 | #include "sigbus.h" |
958b66ea | 45 | #include "hostname-util.h" |
7b17a7d7 | 46 | |
2cf4172a LP |
47 | static char *arg_key_pem = NULL; |
48 | static char *arg_cert_pem = NULL; | |
49 | static char *arg_trust_pem = NULL; | |
f12be7e8 | 50 | |
7b17a7d7 LP |
51 | typedef struct RequestMeta { |
52 | sd_journal *journal; | |
53 | ||
54 | OutputMode mode; | |
55 | ||
56 | char *cursor; | |
57 | int64_t n_skip; | |
58 | uint64_t n_entries; | |
59 | bool n_entries_set; | |
60 | ||
61 | FILE *tmp; | |
62 | uint64_t delta, size; | |
98206c93 LP |
63 | |
64 | int argument_parse_error; | |
7a69007a LP |
65 | |
66 | bool follow; | |
c6511e85 | 67 | bool discrete; |
240a5fe8 LP |
68 | |
69 | uint64_t n_fields; | |
70 | bool n_fields_set; | |
7b17a7d7 LP |
71 | } RequestMeta; |
72 | ||
73 | static const char* const mime_types[_OUTPUT_MODE_MAX] = { | |
74 | [OUTPUT_SHORT] = "text/plain", | |
75 | [OUTPUT_JSON] = "application/json", | |
48383c25 LP |
76 | [OUTPUT_JSON_SSE] = "text/event-stream", |
77 | [OUTPUT_EXPORT] = "application/vnd.fdo.journal", | |
7b17a7d7 LP |
78 | }; |
79 | ||
80 | static RequestMeta *request_meta(void **connection_cls) { | |
81 | RequestMeta *m; | |
82 | ||
fdfccdbc | 83 | assert(connection_cls); |
7b17a7d7 LP |
84 | if (*connection_cls) |
85 | return *connection_cls; | |
86 | ||
87 | m = new0(RequestMeta, 1); | |
88 | if (!m) | |
89 | return NULL; | |
90 | ||
91 | *connection_cls = m; | |
92 | return m; | |
93 | } | |
94 | ||
95 | static void request_meta_free( | |
96 | void *cls, | |
97 | struct MHD_Connection *connection, | |
98 | void **connection_cls, | |
99 | enum MHD_RequestTerminationCode toe) { | |
100 | ||
101 | RequestMeta *m = *connection_cls; | |
102 | ||
103 | if (!m) | |
104 | return; | |
105 | ||
106 | if (m->journal) | |
107 | sd_journal_close(m->journal); | |
108 | ||
109 | if (m->tmp) | |
110 | fclose(m->tmp); | |
111 | ||
112 | free(m->cursor); | |
113 | free(m); | |
114 | } | |
115 | ||
116 | static int open_journal(RequestMeta *m) { | |
117 | assert(m); | |
118 | ||
119 | if (m->journal) | |
120 | return 0; | |
121 | ||
a688baa8 | 122 | return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); |
7b17a7d7 LP |
123 | } |
124 | ||
cc02a7b3 ZJS |
125 | static int request_meta_ensure_tmp(RequestMeta *m) { |
126 | if (m->tmp) | |
127 | rewind(m->tmp); | |
128 | else { | |
129 | int fd; | |
130 | ||
131 | fd = open_tmpfile("/tmp", O_RDWR|O_CLOEXEC); | |
132 | if (fd < 0) | |
133 | return fd; | |
134 | ||
135 | m->tmp = fdopen(fd, "rw"); | |
136 | if (!m->tmp) { | |
137 | safe_close(fd); | |
138 | return -errno; | |
139 | } | |
140 | } | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
7b17a7d7 LP |
145 | static ssize_t request_reader_entries( |
146 | void *cls, | |
147 | uint64_t pos, | |
148 | char *buf, | |
149 | size_t max) { | |
150 | ||
151 | RequestMeta *m = cls; | |
152 | int r; | |
153 | size_t n, k; | |
154 | ||
155 | assert(m); | |
156 | assert(buf); | |
157 | assert(max > 0); | |
158 | assert(pos >= m->delta); | |
159 | ||
160 | pos -= m->delta; | |
161 | ||
162 | while (pos >= m->size) { | |
163 | off_t sz; | |
164 | ||
165 | /* End of this entry, so let's serialize the next | |
166 | * one */ | |
167 | ||
168 | if (m->n_entries_set && | |
169 | m->n_entries <= 0) | |
170 | return MHD_CONTENT_READER_END_OF_STREAM; | |
171 | ||
77ad3b93 LP |
172 | if (m->n_skip < 0) |
173 | r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); | |
174 | else if (m->n_skip > 0) | |
7b17a7d7 LP |
175 | r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
176 | else | |
177 | r = sd_journal_next(m->journal); | |
178 | ||
179 | if (r < 0) { | |
da927ba9 | 180 | log_error_errno(r, "Failed to advance journal pointer: %m"); |
7b17a7d7 | 181 | return MHD_CONTENT_READER_END_WITH_ERROR; |
7a69007a LP |
182 | } else if (r == 0) { |
183 | ||
184 | if (m->follow) { | |
185 | r = sd_journal_wait(m->journal, (uint64_t) -1); | |
186 | if (r < 0) { | |
da927ba9 | 187 | log_error_errno(r, "Couldn't wait for journal event: %m"); |
7a69007a LP |
188 | return MHD_CONTENT_READER_END_WITH_ERROR; |
189 | } | |
190 | ||
191 | continue; | |
192 | } | |
193 | ||
7b17a7d7 | 194 | return MHD_CONTENT_READER_END_OF_STREAM; |
7a69007a | 195 | } |
7b17a7d7 | 196 | |
c6511e85 LP |
197 | if (m->discrete) { |
198 | assert(m->cursor); | |
199 | ||
200 | r = sd_journal_test_cursor(m->journal, m->cursor); | |
201 | if (r < 0) { | |
da927ba9 | 202 | log_error_errno(r, "Failed to test cursor: %m"); |
c6511e85 LP |
203 | return MHD_CONTENT_READER_END_WITH_ERROR; |
204 | } | |
205 | ||
206 | if (r == 0) | |
207 | return MHD_CONTENT_READER_END_OF_STREAM; | |
208 | } | |
209 | ||
7b17a7d7 LP |
210 | pos -= m->size; |
211 | m->delta += m->size; | |
212 | ||
213 | if (m->n_entries_set) | |
214 | m->n_entries -= 1; | |
215 | ||
216 | m->n_skip = 0; | |
217 | ||
cc02a7b3 ZJS |
218 | r = request_meta_ensure_tmp(m); |
219 | if (r < 0) { | |
220 | log_error_errno(r, "Failed to create temporary file: %m"); | |
221 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
7b17a7d7 LP |
222 | } |
223 | ||
94e0bd7d | 224 | r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL); |
7b17a7d7 | 225 | if (r < 0) { |
da927ba9 | 226 | log_error_errno(r, "Failed to serialize item: %m"); |
7b17a7d7 LP |
227 | return MHD_CONTENT_READER_END_WITH_ERROR; |
228 | } | |
229 | ||
230 | sz = ftello(m->tmp); | |
231 | if (sz == (off_t) -1) { | |
56f64d95 | 232 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
7b17a7d7 LP |
233 | return MHD_CONTENT_READER_END_WITH_ERROR; |
234 | } | |
235 | ||
236 | m->size = (uint64_t) sz; | |
237 | } | |
238 | ||
239 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
56f64d95 | 240 | log_error_errno(errno, "Failed to seek to position: %m"); |
7b17a7d7 LP |
241 | return MHD_CONTENT_READER_END_WITH_ERROR; |
242 | } | |
243 | ||
244 | n = m->size - pos; | |
245 | if (n > max) | |
246 | n = max; | |
247 | ||
248 | errno = 0; | |
249 | k = fread(buf, 1, n, m->tmp); | |
250 | if (k != n) { | |
251 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
252 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
253 | } | |
254 | ||
255 | return (ssize_t) k; | |
256 | } | |
257 | ||
258 | static int request_parse_accept( | |
259 | RequestMeta *m, | |
260 | struct MHD_Connection *connection) { | |
261 | ||
6374a73b | 262 | const char *header; |
7b17a7d7 LP |
263 | |
264 | assert(m); | |
265 | assert(connection); | |
266 | ||
6374a73b ZJS |
267 | header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
268 | if (!header) | |
7b17a7d7 LP |
269 | return 0; |
270 | ||
6374a73b | 271 | if (streq(header, mime_types[OUTPUT_JSON])) |
7b17a7d7 | 272 | m->mode = OUTPUT_JSON; |
6374a73b | 273 | else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
48383c25 | 274 | m->mode = OUTPUT_JSON_SSE; |
6374a73b | 275 | else if (streq(header, mime_types[OUTPUT_EXPORT])) |
7b17a7d7 LP |
276 | m->mode = OUTPUT_EXPORT; |
277 | else | |
278 | m->mode = OUTPUT_SHORT; | |
279 | ||
280 | return 0; | |
281 | } | |
282 | ||
283 | static int request_parse_range( | |
284 | RequestMeta *m, | |
285 | struct MHD_Connection *connection) { | |
286 | ||
287 | const char *range, *colon, *colon2; | |
288 | int r; | |
289 | ||
290 | assert(m); | |
291 | assert(connection); | |
292 | ||
293 | range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); | |
294 | if (!range) | |
295 | return 0; | |
296 | ||
297 | if (!startswith(range, "entries=")) | |
298 | return 0; | |
299 | ||
300 | range += 8; | |
301 | range += strspn(range, WHITESPACE); | |
302 | ||
303 | colon = strchr(range, ':'); | |
304 | if (!colon) | |
305 | m->cursor = strdup(range); | |
306 | else { | |
307 | const char *p; | |
308 | ||
309 | colon2 = strchr(colon + 1, ':'); | |
310 | if (colon2) { | |
7fd1b19b | 311 | _cleanup_free_ char *t; |
7b17a7d7 LP |
312 | |
313 | t = strndup(colon + 1, colon2 - colon - 1); | |
314 | if (!t) | |
315 | return -ENOMEM; | |
316 | ||
317 | r = safe_atoi64(t, &m->n_skip); | |
7b17a7d7 LP |
318 | if (r < 0) |
319 | return r; | |
320 | } | |
321 | ||
322 | p = (colon2 ? colon2 : colon) + 1; | |
323 | if (*p) { | |
324 | r = safe_atou64(p, &m->n_entries); | |
325 | if (r < 0) | |
326 | return r; | |
327 | ||
328 | if (m->n_entries <= 0) | |
329 | return -EINVAL; | |
330 | ||
331 | m->n_entries_set = true; | |
332 | } | |
333 | ||
334 | m->cursor = strndup(range, colon - range); | |
335 | } | |
336 | ||
337 | if (!m->cursor) | |
338 | return -ENOMEM; | |
339 | ||
340 | m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; | |
341 | if (isempty(m->cursor)) { | |
342 | free(m->cursor); | |
343 | m->cursor = NULL; | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
98206c93 LP |
349 | static int request_parse_arguments_iterator( |
350 | void *cls, | |
351 | enum MHD_ValueKind kind, | |
352 | const char *key, | |
353 | const char *value) { | |
354 | ||
355 | RequestMeta *m = cls; | |
356 | _cleanup_free_ char *p = NULL; | |
357 | int r; | |
358 | ||
359 | assert(m); | |
360 | ||
361 | if (isempty(key)) { | |
362 | m->argument_parse_error = -EINVAL; | |
363 | return MHD_NO; | |
364 | } | |
365 | ||
7a69007a LP |
366 | if (streq(key, "follow")) { |
367 | if (isempty(value)) { | |
368 | m->follow = true; | |
369 | return MHD_YES; | |
370 | } | |
371 | ||
372 | r = parse_boolean(value); | |
373 | if (r < 0) { | |
374 | m->argument_parse_error = r; | |
375 | return MHD_NO; | |
376 | } | |
377 | ||
378 | m->follow = r; | |
379 | return MHD_YES; | |
380 | } | |
381 | ||
c6511e85 LP |
382 | if (streq(key, "discrete")) { |
383 | if (isempty(value)) { | |
384 | m->discrete = true; | |
385 | return MHD_YES; | |
386 | } | |
387 | ||
388 | r = parse_boolean(value); | |
389 | if (r < 0) { | |
390 | m->argument_parse_error = r; | |
391 | return MHD_NO; | |
392 | } | |
393 | ||
394 | m->discrete = r; | |
395 | return MHD_YES; | |
396 | } | |
397 | ||
082d0180 LP |
398 | if (streq(key, "boot")) { |
399 | if (isempty(value)) | |
400 | r = true; | |
401 | else { | |
402 | r = parse_boolean(value); | |
403 | if (r < 0) { | |
404 | m->argument_parse_error = r; | |
405 | return MHD_NO; | |
406 | } | |
407 | } | |
408 | ||
409 | if (r) { | |
410 | char match[9 + 32 + 1] = "_BOOT_ID="; | |
411 | sd_id128_t bid; | |
412 | ||
413 | r = sd_id128_get_boot(&bid); | |
414 | if (r < 0) { | |
da927ba9 | 415 | log_error_errno(r, "Failed to get boot ID: %m"); |
082d0180 LP |
416 | return MHD_NO; |
417 | } | |
418 | ||
419 | sd_id128_to_string(bid, match + 9); | |
420 | r = sd_journal_add_match(m->journal, match, sizeof(match)-1); | |
421 | if (r < 0) { | |
422 | m->argument_parse_error = r; | |
423 | return MHD_NO; | |
424 | } | |
425 | } | |
426 | ||
427 | return MHD_YES; | |
428 | } | |
429 | ||
98206c93 LP |
430 | p = strjoin(key, "=", strempty(value), NULL); |
431 | if (!p) { | |
432 | m->argument_parse_error = log_oom(); | |
433 | return MHD_NO; | |
434 | } | |
435 | ||
436 | r = sd_journal_add_match(m->journal, p, 0); | |
437 | if (r < 0) { | |
438 | m->argument_parse_error = r; | |
439 | return MHD_NO; | |
440 | } | |
441 | ||
442 | return MHD_YES; | |
443 | } | |
444 | ||
445 | static int request_parse_arguments( | |
446 | RequestMeta *m, | |
447 | struct MHD_Connection *connection) { | |
448 | ||
449 | assert(m); | |
450 | assert(connection); | |
451 | ||
452 | m->argument_parse_error = 0; | |
453 | MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); | |
454 | ||
455 | return m->argument_parse_error; | |
456 | } | |
457 | ||
7b17a7d7 LP |
458 | static int request_handler_entries( |
459 | struct MHD_Connection *connection, | |
8530a143 | 460 | void *connection_cls) { |
7b17a7d7 LP |
461 | |
462 | struct MHD_Response *response; | |
8530a143 | 463 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
464 | int r; |
465 | ||
466 | assert(connection); | |
8530a143 | 467 | assert(m); |
7b17a7d7 LP |
468 | |
469 | r = open_journal(m); | |
470 | if (r < 0) | |
e7216d11 | 471 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); |
7b17a7d7 LP |
472 | |
473 | if (request_parse_accept(m, connection) < 0) | |
e7216d11 | 474 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); |
7b17a7d7 LP |
475 | |
476 | if (request_parse_range(m, connection) < 0) | |
e7216d11 | 477 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header.\n"); |
7b17a7d7 | 478 | |
98206c93 | 479 | if (request_parse_arguments(m, connection) < 0) |
e7216d11 | 480 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments.\n"); |
98206c93 | 481 | |
c6511e85 LP |
482 | if (m->discrete) { |
483 | if (!m->cursor) | |
e7216d11 | 484 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification.\n"); |
c6511e85 LP |
485 | |
486 | m->n_entries = 1; | |
487 | m->n_entries_set = true; | |
488 | } | |
489 | ||
7b17a7d7 LP |
490 | if (m->cursor) |
491 | r = sd_journal_seek_cursor(m->journal, m->cursor); | |
492 | else if (m->n_skip >= 0) | |
493 | r = sd_journal_seek_head(m->journal); | |
494 | else if (m->n_skip < 0) | |
495 | r = sd_journal_seek_tail(m->journal); | |
496 | if (r < 0) | |
e7216d11 | 497 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal.\n"); |
7b17a7d7 LP |
498 | |
499 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); | |
500 | if (!response) | |
501 | return respond_oom(connection); | |
502 | ||
503 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); | |
504 | ||
505 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
506 | MHD_destroy_response(response); | |
507 | ||
508 | return r; | |
509 | } | |
510 | ||
240a5fe8 LP |
511 | static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { |
512 | const char *eq; | |
513 | size_t j; | |
514 | ||
515 | eq = memchr(d, '=', l); | |
516 | if (!eq) | |
517 | return -EINVAL; | |
518 | ||
519 | j = l - (eq - d + 1); | |
520 | ||
521 | if (m == OUTPUT_JSON) { | |
522 | fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); | |
523 | json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); | |
524 | fputs(" }\n", f); | |
525 | } else { | |
526 | fwrite(eq+1, 1, j, f); | |
527 | fputc('\n', f); | |
528 | } | |
529 | ||
530 | return 0; | |
531 | } | |
532 | ||
533 | static ssize_t request_reader_fields( | |
534 | void *cls, | |
535 | uint64_t pos, | |
536 | char *buf, | |
537 | size_t max) { | |
538 | ||
539 | RequestMeta *m = cls; | |
540 | int r; | |
541 | size_t n, k; | |
542 | ||
543 | assert(m); | |
544 | assert(buf); | |
545 | assert(max > 0); | |
546 | assert(pos >= m->delta); | |
547 | ||
548 | pos -= m->delta; | |
549 | ||
550 | while (pos >= m->size) { | |
551 | off_t sz; | |
552 | const void *d; | |
553 | size_t l; | |
554 | ||
555 | /* End of this field, so let's serialize the next | |
556 | * one */ | |
557 | ||
558 | if (m->n_fields_set && | |
559 | m->n_fields <= 0) | |
560 | return MHD_CONTENT_READER_END_OF_STREAM; | |
561 | ||
562 | r = sd_journal_enumerate_unique(m->journal, &d, &l); | |
563 | if (r < 0) { | |
da927ba9 | 564 | log_error_errno(r, "Failed to advance field index: %m"); |
240a5fe8 LP |
565 | return MHD_CONTENT_READER_END_WITH_ERROR; |
566 | } else if (r == 0) | |
567 | return MHD_CONTENT_READER_END_OF_STREAM; | |
568 | ||
569 | pos -= m->size; | |
570 | m->delta += m->size; | |
571 | ||
572 | if (m->n_fields_set) | |
573 | m->n_fields -= 1; | |
574 | ||
cc02a7b3 ZJS |
575 | r = request_meta_ensure_tmp(m); |
576 | if (r < 0) { | |
577 | log_error_errno(r, "Failed to create temporary file: %m"); | |
578 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
240a5fe8 LP |
579 | } |
580 | ||
581 | r = output_field(m->tmp, m->mode, d, l); | |
582 | if (r < 0) { | |
da927ba9 | 583 | log_error_errno(r, "Failed to serialize item: %m"); |
240a5fe8 LP |
584 | return MHD_CONTENT_READER_END_WITH_ERROR; |
585 | } | |
586 | ||
587 | sz = ftello(m->tmp); | |
588 | if (sz == (off_t) -1) { | |
56f64d95 | 589 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
240a5fe8 LP |
590 | return MHD_CONTENT_READER_END_WITH_ERROR; |
591 | } | |
592 | ||
593 | m->size = (uint64_t) sz; | |
594 | } | |
595 | ||
596 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
56f64d95 | 597 | log_error_errno(errno, "Failed to seek to position: %m"); |
240a5fe8 LP |
598 | return MHD_CONTENT_READER_END_WITH_ERROR; |
599 | } | |
600 | ||
601 | n = m->size - pos; | |
602 | if (n > max) | |
603 | n = max; | |
604 | ||
605 | errno = 0; | |
606 | k = fread(buf, 1, n, m->tmp); | |
607 | if (k != n) { | |
608 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
609 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
610 | } | |
611 | ||
612 | return (ssize_t) k; | |
613 | } | |
614 | ||
615 | static int request_handler_fields( | |
616 | struct MHD_Connection *connection, | |
617 | const char *field, | |
618 | void *connection_cls) { | |
619 | ||
620 | struct MHD_Response *response; | |
8530a143 | 621 | RequestMeta *m = connection_cls; |
240a5fe8 LP |
622 | int r; |
623 | ||
624 | assert(connection); | |
8530a143 | 625 | assert(m); |
240a5fe8 LP |
626 | |
627 | r = open_journal(m); | |
628 | if (r < 0) | |
e7216d11 | 629 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); |
240a5fe8 LP |
630 | |
631 | if (request_parse_accept(m, connection) < 0) | |
e7216d11 | 632 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); |
240a5fe8 LP |
633 | |
634 | r = sd_journal_query_unique(m->journal, field); | |
635 | if (r < 0) | |
e7216d11 | 636 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields.\n"); |
240a5fe8 LP |
637 | |
638 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); | |
639 | if (!response) | |
640 | return respond_oom(connection); | |
641 | ||
642 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); | |
643 | ||
644 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
645 | MHD_destroy_response(response); | |
646 | ||
647 | return r; | |
648 | } | |
649 | ||
7b17a7d7 LP |
650 | static int request_handler_redirect( |
651 | struct MHD_Connection *connection, | |
652 | const char *target) { | |
653 | ||
654 | char *page; | |
655 | struct MHD_Response *response; | |
656 | int ret; | |
657 | ||
658 | assert(connection); | |
fadd79d2 | 659 | assert(target); |
7b17a7d7 LP |
660 | |
661 | if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) | |
662 | return respond_oom(connection); | |
663 | ||
664 | response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); | |
665 | if (!response) { | |
666 | free(page); | |
667 | return respond_oom(connection); | |
668 | } | |
669 | ||
670 | MHD_add_response_header(response, "Content-Type", "text/html"); | |
671 | MHD_add_response_header(response, "Location", target); | |
672 | ||
673 | ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); | |
674 | MHD_destroy_response(response); | |
675 | ||
676 | return ret; | |
677 | } | |
678 | ||
679 | static int request_handler_file( | |
680 | struct MHD_Connection *connection, | |
681 | const char *path, | |
682 | const char *mime_type) { | |
683 | ||
684 | struct MHD_Response *response; | |
685 | int ret; | |
686 | _cleanup_close_ int fd = -1; | |
687 | struct stat st; | |
688 | ||
689 | assert(connection); | |
690 | assert(path); | |
691 | assert(mime_type); | |
692 | ||
693 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
694 | if (fd < 0) | |
e7216d11 | 695 | return mhd_respondf(connection, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m\n", path); |
7b17a7d7 LP |
696 | |
697 | if (fstat(fd, &st) < 0) | |
e7216d11 | 698 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m\n"); |
7b17a7d7 LP |
699 | |
700 | response = MHD_create_response_from_fd_at_offset(st.st_size, fd, 0); | |
701 | if (!response) | |
702 | return respond_oom(connection); | |
703 | ||
704 | fd = -1; | |
705 | ||
706 | MHD_add_response_header(response, "Content-Type", mime_type); | |
707 | ||
708 | ret = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
709 | MHD_destroy_response(response); | |
710 | ||
711 | return ret; | |
712 | } | |
713 | ||
a7edaadd | 714 | static int get_virtualization(char **v) { |
a7edaadd | 715 | _cleanup_bus_unref_ sd_bus *bus = NULL; |
39883f62 | 716 | char *b = NULL; |
a7edaadd LP |
717 | int r; |
718 | ||
76b54375 | 719 | r = sd_bus_default_system(&bus); |
a7edaadd LP |
720 | if (r < 0) |
721 | return r; | |
722 | ||
47c649b5 | 723 | r = sd_bus_get_property_string( |
a7edaadd LP |
724 | bus, |
725 | "org.freedesktop.systemd1", | |
726 | "/org/freedesktop/systemd1", | |
917b5dc7 | 727 | "org.freedesktop.systemd1.Manager", |
47c649b5 LP |
728 | "Virtualization", |
729 | NULL, | |
730 | &b); | |
a7edaadd LP |
731 | if (r < 0) |
732 | return r; | |
733 | ||
47c649b5 LP |
734 | if (isempty(b)) { |
735 | free(b); | |
a7edaadd LP |
736 | *v = NULL; |
737 | return 0; | |
738 | } | |
739 | ||
a7edaadd LP |
740 | *v = b; |
741 | return 1; | |
742 | } | |
743 | ||
7b17a7d7 LP |
744 | static int request_handler_machine( |
745 | struct MHD_Connection *connection, | |
8530a143 | 746 | void *connection_cls) { |
7b17a7d7 LP |
747 | |
748 | struct MHD_Response *response; | |
8530a143 | 749 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
750 | int r; |
751 | _cleanup_free_ char* hostname = NULL, *os_name = NULL; | |
a7f7d1bd | 752 | uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0; |
7b17a7d7 LP |
753 | char *json; |
754 | sd_id128_t mid, bid; | |
a7edaadd | 755 | _cleanup_free_ char *v = NULL; |
7b17a7d7 LP |
756 | |
757 | assert(connection); | |
8530a143 | 758 | assert(m); |
7b17a7d7 LP |
759 | |
760 | r = open_journal(m); | |
761 | if (r < 0) | |
e7216d11 | 762 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); |
7b17a7d7 LP |
763 | |
764 | r = sd_id128_get_machine(&mid); | |
765 | if (r < 0) | |
e7216d11 | 766 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %s\n", strerror(-r)); |
7b17a7d7 LP |
767 | |
768 | r = sd_id128_get_boot(&bid); | |
769 | if (r < 0) | |
e7216d11 | 770 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %s\n", strerror(-r)); |
7b17a7d7 LP |
771 | |
772 | hostname = gethostname_malloc(); | |
773 | if (!hostname) | |
774 | return respond_oom(connection); | |
775 | ||
776 | r = sd_journal_get_usage(m->journal, &usage); | |
777 | if (r < 0) | |
e7216d11 | 778 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); |
7b17a7d7 LP |
779 | |
780 | r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); | |
781 | if (r < 0) | |
e7216d11 | 782 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); |
7b17a7d7 | 783 | |
5ae4d543 | 784 | if (parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL) == -ENOENT) |
e51728b0 | 785 | (void) parse_env_file("/usr/lib/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL); |
7b17a7d7 | 786 | |
a7edaadd | 787 | get_virtualization(&v); |
7b17a7d7 LP |
788 | |
789 | r = asprintf(&json, | |
790 | "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
791 | "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
792 | "\"hostname\" : \"%s\"," | |
793 | "\"os_pretty_name\" : \"%s\"," | |
794 | "\"virtualization\" : \"%s\"," | |
507f22bd ZJS |
795 | "\"usage\" : \"%"PRIu64"\"," |
796 | "\"cutoff_from_realtime\" : \"%"PRIu64"\"," | |
797 | "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", | |
7b17a7d7 LP |
798 | SD_ID128_FORMAT_VAL(mid), |
799 | SD_ID128_FORMAT_VAL(bid), | |
e724b063 | 800 | hostname_cleanup(hostname, false), |
7b17a7d7 | 801 | os_name ? os_name : "Linux", |
a7edaadd | 802 | v ? v : "bare", |
507f22bd ZJS |
803 | usage, |
804 | cutoff_from, | |
805 | cutoff_to); | |
7b17a7d7 LP |
806 | |
807 | if (r < 0) | |
808 | return respond_oom(connection); | |
809 | ||
810 | response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); | |
811 | if (!response) { | |
812 | free(json); | |
813 | return respond_oom(connection); | |
814 | } | |
815 | ||
816 | MHD_add_response_header(response, "Content-Type", "application/json"); | |
817 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
818 | MHD_destroy_response(response); | |
819 | ||
820 | return r; | |
821 | } | |
822 | ||
823 | static int request_handler( | |
824 | void *cls, | |
825 | struct MHD_Connection *connection, | |
826 | const char *url, | |
827 | const char *method, | |
828 | const char *version, | |
829 | const char *upload_data, | |
830 | size_t *upload_data_size, | |
831 | void **connection_cls) { | |
f12be7e8 | 832 | int r, code; |
7b17a7d7 LP |
833 | |
834 | assert(connection); | |
8530a143 | 835 | assert(connection_cls); |
7b17a7d7 LP |
836 | assert(url); |
837 | assert(method); | |
838 | ||
839 | if (!streq(method, "GET")) | |
e7216d11 ZJS |
840 | return mhd_respond(connection, MHD_HTTP_METHOD_NOT_ACCEPTABLE, |
841 | "Unsupported method.\n"); | |
a93035ce | 842 | |
7b17a7d7 | 843 | |
8530a143 ZJS |
844 | if (!*connection_cls) { |
845 | if (!request_meta(connection_cls)) | |
846 | return respond_oom(connection); | |
847 | return MHD_YES; | |
848 | } | |
849 | ||
2cf4172a | 850 | if (arg_trust_pem) { |
8201af08 | 851 | r = check_permissions(connection, &code, NULL); |
f12be7e8 ZJS |
852 | if (r < 0) |
853 | return code; | |
854 | } | |
855 | ||
7b17a7d7 LP |
856 | if (streq(url, "/")) |
857 | return request_handler_redirect(connection, "/browse"); | |
858 | ||
859 | if (streq(url, "/entries")) | |
8530a143 | 860 | return request_handler_entries(connection, *connection_cls); |
7b17a7d7 | 861 | |
240a5fe8 | 862 | if (startswith(url, "/fields/")) |
8530a143 | 863 | return request_handler_fields(connection, url + 8, *connection_cls); |
240a5fe8 | 864 | |
7b17a7d7 LP |
865 | if (streq(url, "/browse")) |
866 | return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); | |
867 | ||
868 | if (streq(url, "/machine")) | |
8530a143 | 869 | return request_handler_machine(connection, *connection_cls); |
7b17a7d7 | 870 | |
e7216d11 | 871 | return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found.\n"); |
7b17a7d7 LP |
872 | } |
873 | ||
601185b4 | 874 | static void help(void) { |
c3a7cfb7 ZJS |
875 | printf("%s [OPTIONS...] ...\n\n" |
876 | "HTTP server for journal events.\n\n" | |
877 | " -h --help Show this help\n" | |
878 | " --version Show package version\n" | |
e5ebe12b ZJS |
879 | " --cert=CERT.PEM Server certificate in PEM format\n" |
880 | " --key=KEY.PEM Server key in PEM format\n" | |
881 | " --trust=CERT.PEM Certificat authority certificate in PEM format\n", | |
c3a7cfb7 | 882 | program_invocation_short_name); |
c3a7cfb7 ZJS |
883 | } |
884 | ||
858634ff ZJS |
885 | static int parse_argv(int argc, char *argv[]) { |
886 | enum { | |
887 | ARG_VERSION = 0x100, | |
888 | ARG_KEY, | |
889 | ARG_CERT, | |
e5ebe12b | 890 | ARG_TRUST, |
858634ff ZJS |
891 | }; |
892 | ||
893 | int r, c; | |
894 | ||
895 | static const struct option options[] = { | |
c3a7cfb7 | 896 | { "help", no_argument, NULL, 'h' }, |
858634ff ZJS |
897 | { "version", no_argument, NULL, ARG_VERSION }, |
898 | { "key", required_argument, NULL, ARG_KEY }, | |
899 | { "cert", required_argument, NULL, ARG_CERT }, | |
e5ebe12b | 900 | { "trust", required_argument, NULL, ARG_TRUST }, |
eb9da376 | 901 | {} |
858634ff ZJS |
902 | }; |
903 | ||
904 | assert(argc >= 0); | |
905 | assert(argv); | |
906 | ||
c3a7cfb7 | 907 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
eb9da376 | 908 | |
858634ff | 909 | switch(c) { |
eb9da376 LP |
910 | |
911 | case 'h': | |
601185b4 ZJS |
912 | help(); |
913 | return 0; | |
eb9da376 | 914 | |
858634ff ZJS |
915 | case ARG_VERSION: |
916 | puts(PACKAGE_STRING); | |
917 | puts(SYSTEMD_FEATURES); | |
918 | return 0; | |
919 | ||
920 | case ARG_KEY: | |
2cf4172a | 921 | if (arg_key_pem) { |
858634ff ZJS |
922 | log_error("Key file specified twice"); |
923 | return -EINVAL; | |
924 | } | |
2cf4172a | 925 | r = read_full_file(optarg, &arg_key_pem, NULL); |
23bbb0de MS |
926 | if (r < 0) |
927 | return log_error_errno(r, "Failed to read key file: %m"); | |
2cf4172a | 928 | assert(arg_key_pem); |
858634ff | 929 | break; |
7b17a7d7 | 930 | |
858634ff | 931 | case ARG_CERT: |
2cf4172a | 932 | if (arg_cert_pem) { |
858634ff ZJS |
933 | log_error("Certificate file specified twice"); |
934 | return -EINVAL; | |
935 | } | |
2cf4172a | 936 | r = read_full_file(optarg, &arg_cert_pem, NULL); |
23bbb0de MS |
937 | if (r < 0) |
938 | return log_error_errno(r, "Failed to read certificate file: %m"); | |
2cf4172a | 939 | assert(arg_cert_pem); |
858634ff ZJS |
940 | break; |
941 | ||
e5ebe12b | 942 | case ARG_TRUST: |
f12be7e8 | 943 | #ifdef HAVE_GNUTLS |
2cf4172a | 944 | if (arg_trust_pem) { |
e5ebe12b ZJS |
945 | log_error("CA certificate file specified twice"); |
946 | return -EINVAL; | |
947 | } | |
2cf4172a | 948 | r = read_full_file(optarg, &arg_trust_pem, NULL); |
23bbb0de MS |
949 | if (r < 0) |
950 | return log_error_errno(r, "Failed to read CA certificate file: %m"); | |
2cf4172a | 951 | assert(arg_trust_pem); |
e5ebe12b | 952 | break; |
f12be7e8 ZJS |
953 | #else |
954 | log_error("Option --trust is not available."); | |
955 | #endif | |
e5ebe12b | 956 | |
858634ff ZJS |
957 | case '?': |
958 | return -EINVAL; | |
959 | ||
960 | default: | |
eb9da376 | 961 | assert_not_reached("Unhandled option"); |
858634ff ZJS |
962 | } |
963 | ||
964 | if (optind < argc) { | |
7b17a7d7 | 965 | log_error("This program does not take arguments."); |
858634ff ZJS |
966 | return -EINVAL; |
967 | } | |
968 | ||
2cf4172a | 969 | if (!!arg_key_pem != !!arg_cert_pem) { |
858634ff ZJS |
970 | log_error("Certificate and key files must be specified together"); |
971 | return -EINVAL; | |
7b17a7d7 LP |
972 | } |
973 | ||
2cf4172a | 974 | if (arg_trust_pem && !arg_key_pem) { |
e5ebe12b ZJS |
975 | log_error("CA certificate can only be used with certificate file"); |
976 | return -EINVAL; | |
977 | } | |
978 | ||
858634ff ZJS |
979 | return 1; |
980 | } | |
981 | ||
982 | int main(int argc, char *argv[]) { | |
983 | struct MHD_Daemon *d = NULL; | |
984 | int r, n; | |
985 | ||
77ad3b93 | 986 | log_set_target(LOG_TARGET_AUTO); |
7b17a7d7 LP |
987 | log_parse_environment(); |
988 | log_open(); | |
989 | ||
858634ff ZJS |
990 | r = parse_argv(argc, argv); |
991 | if (r < 0) | |
992 | return EXIT_FAILURE; | |
993 | if (r == 0) | |
994 | return EXIT_SUCCESS; | |
995 | ||
2cf4172a LP |
996 | sigbus_install(); |
997 | ||
d357562c ZJS |
998 | r = setup_gnutls_logger(NULL); |
999 | if (r < 0) | |
1000 | return EXIT_FAILURE; | |
cafc7f91 | 1001 | |
7b17a7d7 LP |
1002 | n = sd_listen_fds(1); |
1003 | if (n < 0) { | |
da927ba9 | 1004 | log_error_errno(n, "Failed to determine passed sockets: %m"); |
7b17a7d7 LP |
1005 | goto finish; |
1006 | } else if (n > 1) { | |
1007 | log_error("Can't listen on more than one socket."); | |
1008 | goto finish; | |
7b17a7d7 | 1009 | } else { |
c54ff8e3 ZJS |
1010 | struct MHD_OptionItem opts[] = { |
1011 | { MHD_OPTION_NOTIFY_COMPLETED, | |
1012 | (intptr_t) request_meta_free, NULL }, | |
e64690a8 ZJS |
1013 | { MHD_OPTION_EXTERNAL_LOGGER, |
1014 | (intptr_t) microhttpd_logger, NULL }, | |
c54ff8e3 | 1015 | { MHD_OPTION_END, 0, NULL }, |
858634ff ZJS |
1016 | { MHD_OPTION_END, 0, NULL }, |
1017 | { MHD_OPTION_END, 0, NULL }, | |
e5ebe12b | 1018 | { MHD_OPTION_END, 0, NULL }, |
c54ff8e3 | 1019 | { MHD_OPTION_END, 0, NULL }}; |
e64690a8 | 1020 | int opts_pos = 2; |
858634ff ZJS |
1021 | int flags = MHD_USE_THREAD_PER_CONNECTION|MHD_USE_POLL|MHD_USE_DEBUG; |
1022 | ||
c54ff8e3 | 1023 | if (n > 0) |
858634ff ZJS |
1024 | opts[opts_pos++] = (struct MHD_OptionItem) |
1025 | {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; | |
2cf4172a LP |
1026 | if (arg_key_pem) { |
1027 | assert(arg_cert_pem); | |
858634ff | 1028 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1029 | {MHD_OPTION_HTTPS_MEM_KEY, 0, arg_key_pem}; |
858634ff | 1030 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1031 | {MHD_OPTION_HTTPS_MEM_CERT, 0, arg_cert_pem}; |
858634ff ZJS |
1032 | flags |= MHD_USE_SSL; |
1033 | } | |
2cf4172a | 1034 | if (arg_trust_pem) { |
e5ebe12b ZJS |
1035 | assert(flags & MHD_USE_SSL); |
1036 | opts[opts_pos++] = (struct MHD_OptionItem) | |
2cf4172a | 1037 | {MHD_OPTION_HTTPS_MEM_TRUST, 0, arg_trust_pem}; |
e5ebe12b | 1038 | } |
858634ff ZJS |
1039 | |
1040 | d = MHD_start_daemon(flags, 19531, | |
1041 | NULL, NULL, | |
1042 | request_handler, NULL, | |
1043 | MHD_OPTION_ARRAY, opts, | |
1044 | MHD_OPTION_END); | |
7b17a7d7 LP |
1045 | } |
1046 | ||
6374a73b | 1047 | if (!d) { |
7b17a7d7 LP |
1048 | log_error("Failed to start daemon!"); |
1049 | goto finish; | |
1050 | } | |
1051 | ||
1052 | pause(); | |
1053 | ||
1054 | r = EXIT_SUCCESS; | |
1055 | ||
1056 | finish: | |
6374a73b ZJS |
1057 | if (d) |
1058 | MHD_stop_daemon(d); | |
7b17a7d7 LP |
1059 | |
1060 | return r; | |
1061 | } |