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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 | ||
3e044c49 | 106 | sd_journal_close(m->journal); |
7b17a7d7 LP |
107 | |
108 | if (m->tmp) | |
109 | fclose(m->tmp); | |
110 | ||
111 | free(m->cursor); | |
112 | free(m); | |
113 | } | |
114 | ||
115 | static int open_journal(RequestMeta *m) { | |
116 | assert(m); | |
117 | ||
118 | if (m->journal) | |
119 | return 0; | |
120 | ||
a688baa8 | 121 | return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); |
7b17a7d7 LP |
122 | } |
123 | ||
cc02a7b3 ZJS |
124 | static int request_meta_ensure_tmp(RequestMeta *m) { |
125 | if (m->tmp) | |
126 | rewind(m->tmp); | |
127 | else { | |
128 | int fd; | |
129 | ||
130 | fd = open_tmpfile("/tmp", O_RDWR|O_CLOEXEC); | |
131 | if (fd < 0) | |
132 | return fd; | |
133 | ||
9e19c04f | 134 | m->tmp = fdopen(fd, "w+"); |
cc02a7b3 ZJS |
135 | if (!m->tmp) { |
136 | safe_close(fd); | |
137 | return -errno; | |
138 | } | |
139 | } | |
140 | ||
141 | return 0; | |
142 | } | |
143 | ||
7b17a7d7 LP |
144 | static ssize_t request_reader_entries( |
145 | void *cls, | |
146 | uint64_t pos, | |
147 | char *buf, | |
148 | size_t max) { | |
149 | ||
150 | RequestMeta *m = cls; | |
151 | int r; | |
152 | size_t n, k; | |
153 | ||
154 | assert(m); | |
155 | assert(buf); | |
156 | assert(max > 0); | |
157 | assert(pos >= m->delta); | |
158 | ||
159 | pos -= m->delta; | |
160 | ||
161 | while (pos >= m->size) { | |
162 | off_t sz; | |
163 | ||
164 | /* End of this entry, so let's serialize the next | |
165 | * one */ | |
166 | ||
167 | if (m->n_entries_set && | |
168 | m->n_entries <= 0) | |
169 | return MHD_CONTENT_READER_END_OF_STREAM; | |
170 | ||
77ad3b93 LP |
171 | if (m->n_skip < 0) |
172 | r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); | |
173 | else if (m->n_skip > 0) | |
7b17a7d7 LP |
174 | r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
175 | else | |
176 | r = sd_journal_next(m->journal); | |
177 | ||
178 | if (r < 0) { | |
da927ba9 | 179 | log_error_errno(r, "Failed to advance journal pointer: %m"); |
7b17a7d7 | 180 | return MHD_CONTENT_READER_END_WITH_ERROR; |
7a69007a LP |
181 | } else if (r == 0) { |
182 | ||
183 | if (m->follow) { | |
184 | r = sd_journal_wait(m->journal, (uint64_t) -1); | |
185 | if (r < 0) { | |
da927ba9 | 186 | log_error_errno(r, "Couldn't wait for journal event: %m"); |
7a69007a LP |
187 | return MHD_CONTENT_READER_END_WITH_ERROR; |
188 | } | |
189 | ||
190 | continue; | |
191 | } | |
192 | ||
7b17a7d7 | 193 | return MHD_CONTENT_READER_END_OF_STREAM; |
7a69007a | 194 | } |
7b17a7d7 | 195 | |
c6511e85 LP |
196 | if (m->discrete) { |
197 | assert(m->cursor); | |
198 | ||
199 | r = sd_journal_test_cursor(m->journal, m->cursor); | |
200 | if (r < 0) { | |
da927ba9 | 201 | log_error_errno(r, "Failed to test cursor: %m"); |
c6511e85 LP |
202 | return MHD_CONTENT_READER_END_WITH_ERROR; |
203 | } | |
204 | ||
205 | if (r == 0) | |
206 | return MHD_CONTENT_READER_END_OF_STREAM; | |
207 | } | |
208 | ||
7b17a7d7 LP |
209 | pos -= m->size; |
210 | m->delta += m->size; | |
211 | ||
212 | if (m->n_entries_set) | |
213 | m->n_entries -= 1; | |
214 | ||
215 | m->n_skip = 0; | |
216 | ||
cc02a7b3 ZJS |
217 | r = request_meta_ensure_tmp(m); |
218 | if (r < 0) { | |
219 | log_error_errno(r, "Failed to create temporary file: %m"); | |
220 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
7b17a7d7 LP |
221 | } |
222 | ||
94e0bd7d | 223 | r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL); |
7b17a7d7 | 224 | if (r < 0) { |
da927ba9 | 225 | log_error_errno(r, "Failed to serialize item: %m"); |
7b17a7d7 LP |
226 | return MHD_CONTENT_READER_END_WITH_ERROR; |
227 | } | |
228 | ||
229 | sz = ftello(m->tmp); | |
230 | if (sz == (off_t) -1) { | |
56f64d95 | 231 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
7b17a7d7 LP |
232 | return MHD_CONTENT_READER_END_WITH_ERROR; |
233 | } | |
234 | ||
235 | m->size = (uint64_t) sz; | |
236 | } | |
237 | ||
238 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
56f64d95 | 239 | log_error_errno(errno, "Failed to seek to position: %m"); |
7b17a7d7 LP |
240 | return MHD_CONTENT_READER_END_WITH_ERROR; |
241 | } | |
242 | ||
243 | n = m->size - pos; | |
244 | if (n > max) | |
245 | n = max; | |
246 | ||
247 | errno = 0; | |
248 | k = fread(buf, 1, n, m->tmp); | |
249 | if (k != n) { | |
250 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
251 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
252 | } | |
253 | ||
254 | return (ssize_t) k; | |
255 | } | |
256 | ||
257 | static int request_parse_accept( | |
258 | RequestMeta *m, | |
259 | struct MHD_Connection *connection) { | |
260 | ||
6374a73b | 261 | const char *header; |
7b17a7d7 LP |
262 | |
263 | assert(m); | |
264 | assert(connection); | |
265 | ||
6374a73b ZJS |
266 | header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
267 | if (!header) | |
7b17a7d7 LP |
268 | return 0; |
269 | ||
6374a73b | 270 | if (streq(header, mime_types[OUTPUT_JSON])) |
7b17a7d7 | 271 | m->mode = OUTPUT_JSON; |
6374a73b | 272 | else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
48383c25 | 273 | m->mode = OUTPUT_JSON_SSE; |
6374a73b | 274 | else if (streq(header, mime_types[OUTPUT_EXPORT])) |
7b17a7d7 LP |
275 | m->mode = OUTPUT_EXPORT; |
276 | else | |
277 | m->mode = OUTPUT_SHORT; | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | static int request_parse_range( | |
283 | RequestMeta *m, | |
284 | struct MHD_Connection *connection) { | |
285 | ||
286 | const char *range, *colon, *colon2; | |
287 | int r; | |
288 | ||
289 | assert(m); | |
290 | assert(connection); | |
291 | ||
292 | range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); | |
293 | if (!range) | |
294 | return 0; | |
295 | ||
296 | if (!startswith(range, "entries=")) | |
297 | return 0; | |
298 | ||
299 | range += 8; | |
300 | range += strspn(range, WHITESPACE); | |
301 | ||
302 | colon = strchr(range, ':'); | |
303 | if (!colon) | |
304 | m->cursor = strdup(range); | |
305 | else { | |
306 | const char *p; | |
307 | ||
308 | colon2 = strchr(colon + 1, ':'); | |
309 | if (colon2) { | |
7fd1b19b | 310 | _cleanup_free_ char *t; |
7b17a7d7 LP |
311 | |
312 | t = strndup(colon + 1, colon2 - colon - 1); | |
313 | if (!t) | |
314 | return -ENOMEM; | |
315 | ||
316 | r = safe_atoi64(t, &m->n_skip); | |
7b17a7d7 LP |
317 | if (r < 0) |
318 | return r; | |
319 | } | |
320 | ||
321 | p = (colon2 ? colon2 : colon) + 1; | |
322 | if (*p) { | |
323 | r = safe_atou64(p, &m->n_entries); | |
324 | if (r < 0) | |
325 | return r; | |
326 | ||
327 | if (m->n_entries <= 0) | |
328 | return -EINVAL; | |
329 | ||
330 | m->n_entries_set = true; | |
331 | } | |
332 | ||
333 | m->cursor = strndup(range, colon - range); | |
334 | } | |
335 | ||
336 | if (!m->cursor) | |
337 | return -ENOMEM; | |
338 | ||
339 | m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; | |
ece174c5 | 340 | if (isempty(m->cursor)) |
a1e58e8e | 341 | m->cursor = mfree(m->cursor); |
7b17a7d7 LP |
342 | |
343 | return 0; | |
344 | } | |
345 | ||
98206c93 LP |
346 | static int request_parse_arguments_iterator( |
347 | void *cls, | |
348 | enum MHD_ValueKind kind, | |
349 | const char *key, | |
350 | const char *value) { | |
351 | ||
352 | RequestMeta *m = cls; | |
353 | _cleanup_free_ char *p = NULL; | |
354 | int r; | |
355 | ||
356 | assert(m); | |
357 | ||
358 | if (isempty(key)) { | |
359 | m->argument_parse_error = -EINVAL; | |
360 | return MHD_NO; | |
361 | } | |
362 | ||
7a69007a LP |
363 | if (streq(key, "follow")) { |
364 | if (isempty(value)) { | |
365 | m->follow = true; | |
366 | return MHD_YES; | |
367 | } | |
368 | ||
369 | r = parse_boolean(value); | |
370 | if (r < 0) { | |
371 | m->argument_parse_error = r; | |
372 | return MHD_NO; | |
373 | } | |
374 | ||
375 | m->follow = r; | |
376 | return MHD_YES; | |
377 | } | |
378 | ||
c6511e85 LP |
379 | if (streq(key, "discrete")) { |
380 | if (isempty(value)) { | |
381 | m->discrete = true; | |
382 | return MHD_YES; | |
383 | } | |
384 | ||
385 | r = parse_boolean(value); | |
386 | if (r < 0) { | |
387 | m->argument_parse_error = r; | |
388 | return MHD_NO; | |
389 | } | |
390 | ||
391 | m->discrete = r; | |
392 | return MHD_YES; | |
393 | } | |
394 | ||
082d0180 LP |
395 | if (streq(key, "boot")) { |
396 | if (isempty(value)) | |
397 | r = true; | |
398 | else { | |
399 | r = parse_boolean(value); | |
400 | if (r < 0) { | |
401 | m->argument_parse_error = r; | |
402 | return MHD_NO; | |
403 | } | |
404 | } | |
405 | ||
406 | if (r) { | |
407 | char match[9 + 32 + 1] = "_BOOT_ID="; | |
408 | sd_id128_t bid; | |
409 | ||
410 | r = sd_id128_get_boot(&bid); | |
411 | if (r < 0) { | |
da927ba9 | 412 | log_error_errno(r, "Failed to get boot ID: %m"); |
082d0180 LP |
413 | return MHD_NO; |
414 | } | |
415 | ||
416 | sd_id128_to_string(bid, match + 9); | |
417 | r = sd_journal_add_match(m->journal, match, sizeof(match)-1); | |
418 | if (r < 0) { | |
419 | m->argument_parse_error = r; | |
420 | return MHD_NO; | |
421 | } | |
422 | } | |
423 | ||
424 | return MHD_YES; | |
425 | } | |
426 | ||
98206c93 LP |
427 | p = strjoin(key, "=", strempty(value), NULL); |
428 | if (!p) { | |
429 | m->argument_parse_error = log_oom(); | |
430 | return MHD_NO; | |
431 | } | |
432 | ||
433 | r = sd_journal_add_match(m->journal, p, 0); | |
434 | if (r < 0) { | |
435 | m->argument_parse_error = r; | |
436 | return MHD_NO; | |
437 | } | |
438 | ||
439 | return MHD_YES; | |
440 | } | |
441 | ||
442 | static int request_parse_arguments( | |
443 | RequestMeta *m, | |
444 | struct MHD_Connection *connection) { | |
445 | ||
446 | assert(m); | |
447 | assert(connection); | |
448 | ||
449 | m->argument_parse_error = 0; | |
450 | MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); | |
451 | ||
452 | return m->argument_parse_error; | |
453 | } | |
454 | ||
7b17a7d7 LP |
455 | static int request_handler_entries( |
456 | struct MHD_Connection *connection, | |
8530a143 | 457 | void *connection_cls) { |
7b17a7d7 LP |
458 | |
459 | struct MHD_Response *response; | |
8530a143 | 460 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
461 | int r; |
462 | ||
463 | assert(connection); | |
8530a143 | 464 | assert(m); |
7b17a7d7 LP |
465 | |
466 | r = open_journal(m); | |
467 | if (r < 0) | |
e7216d11 | 468 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); |
7b17a7d7 LP |
469 | |
470 | if (request_parse_accept(m, connection) < 0) | |
e7216d11 | 471 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); |
7b17a7d7 LP |
472 | |
473 | if (request_parse_range(m, connection) < 0) | |
e7216d11 | 474 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header.\n"); |
7b17a7d7 | 475 | |
98206c93 | 476 | if (request_parse_arguments(m, connection) < 0) |
e7216d11 | 477 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments.\n"); |
98206c93 | 478 | |
c6511e85 LP |
479 | if (m->discrete) { |
480 | if (!m->cursor) | |
e7216d11 | 481 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification.\n"); |
c6511e85 LP |
482 | |
483 | m->n_entries = 1; | |
484 | m->n_entries_set = true; | |
485 | } | |
486 | ||
7b17a7d7 LP |
487 | if (m->cursor) |
488 | r = sd_journal_seek_cursor(m->journal, m->cursor); | |
489 | else if (m->n_skip >= 0) | |
490 | r = sd_journal_seek_head(m->journal); | |
491 | else if (m->n_skip < 0) | |
492 | r = sd_journal_seek_tail(m->journal); | |
493 | if (r < 0) | |
e7216d11 | 494 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal.\n"); |
7b17a7d7 LP |
495 | |
496 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); | |
497 | if (!response) | |
498 | return respond_oom(connection); | |
499 | ||
500 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); | |
501 | ||
502 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
503 | MHD_destroy_response(response); | |
504 | ||
505 | return r; | |
506 | } | |
507 | ||
240a5fe8 LP |
508 | static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { |
509 | const char *eq; | |
510 | size_t j; | |
511 | ||
512 | eq = memchr(d, '=', l); | |
513 | if (!eq) | |
514 | return -EINVAL; | |
515 | ||
516 | j = l - (eq - d + 1); | |
517 | ||
518 | if (m == OUTPUT_JSON) { | |
519 | fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); | |
520 | json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); | |
521 | fputs(" }\n", f); | |
522 | } else { | |
523 | fwrite(eq+1, 1, j, f); | |
524 | fputc('\n', f); | |
525 | } | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | static ssize_t request_reader_fields( | |
531 | void *cls, | |
532 | uint64_t pos, | |
533 | char *buf, | |
534 | size_t max) { | |
535 | ||
536 | RequestMeta *m = cls; | |
537 | int r; | |
538 | size_t n, k; | |
539 | ||
540 | assert(m); | |
541 | assert(buf); | |
542 | assert(max > 0); | |
543 | assert(pos >= m->delta); | |
544 | ||
545 | pos -= m->delta; | |
546 | ||
547 | while (pos >= m->size) { | |
548 | off_t sz; | |
549 | const void *d; | |
550 | size_t l; | |
551 | ||
552 | /* End of this field, so let's serialize the next | |
553 | * one */ | |
554 | ||
555 | if (m->n_fields_set && | |
556 | m->n_fields <= 0) | |
557 | return MHD_CONTENT_READER_END_OF_STREAM; | |
558 | ||
559 | r = sd_journal_enumerate_unique(m->journal, &d, &l); | |
560 | if (r < 0) { | |
da927ba9 | 561 | log_error_errno(r, "Failed to advance field index: %m"); |
240a5fe8 LP |
562 | return MHD_CONTENT_READER_END_WITH_ERROR; |
563 | } else if (r == 0) | |
564 | return MHD_CONTENT_READER_END_OF_STREAM; | |
565 | ||
566 | pos -= m->size; | |
567 | m->delta += m->size; | |
568 | ||
569 | if (m->n_fields_set) | |
570 | m->n_fields -= 1; | |
571 | ||
cc02a7b3 ZJS |
572 | r = request_meta_ensure_tmp(m); |
573 | if (r < 0) { | |
574 | log_error_errno(r, "Failed to create temporary file: %m"); | |
575 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
240a5fe8 LP |
576 | } |
577 | ||
578 | r = output_field(m->tmp, m->mode, d, l); | |
579 | if (r < 0) { | |
da927ba9 | 580 | log_error_errno(r, "Failed to serialize item: %m"); |
240a5fe8 LP |
581 | return MHD_CONTENT_READER_END_WITH_ERROR; |
582 | } | |
583 | ||
584 | sz = ftello(m->tmp); | |
585 | if (sz == (off_t) -1) { | |
56f64d95 | 586 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
240a5fe8 LP |
587 | return MHD_CONTENT_READER_END_WITH_ERROR; |
588 | } | |
589 | ||
590 | m->size = (uint64_t) sz; | |
591 | } | |
592 | ||
593 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
56f64d95 | 594 | log_error_errno(errno, "Failed to seek to position: %m"); |
240a5fe8 LP |
595 | return MHD_CONTENT_READER_END_WITH_ERROR; |
596 | } | |
597 | ||
598 | n = m->size - pos; | |
599 | if (n > max) | |
600 | n = max; | |
601 | ||
602 | errno = 0; | |
603 | k = fread(buf, 1, n, m->tmp); | |
604 | if (k != n) { | |
605 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
606 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
607 | } | |
608 | ||
609 | return (ssize_t) k; | |
610 | } | |
611 | ||
612 | static int request_handler_fields( | |
613 | struct MHD_Connection *connection, | |
614 | const char *field, | |
615 | void *connection_cls) { | |
616 | ||
617 | struct MHD_Response *response; | |
8530a143 | 618 | RequestMeta *m = connection_cls; |
240a5fe8 LP |
619 | int r; |
620 | ||
621 | assert(connection); | |
8530a143 | 622 | assert(m); |
240a5fe8 LP |
623 | |
624 | r = open_journal(m); | |
625 | if (r < 0) | |
e7216d11 | 626 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); |
240a5fe8 LP |
627 | |
628 | if (request_parse_accept(m, connection) < 0) | |
e7216d11 | 629 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header.\n"); |
240a5fe8 LP |
630 | |
631 | r = sd_journal_query_unique(m->journal, field); | |
632 | if (r < 0) | |
e7216d11 | 633 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields.\n"); |
240a5fe8 LP |
634 | |
635 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); | |
636 | if (!response) | |
637 | return respond_oom(connection); | |
638 | ||
639 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); | |
640 | ||
641 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
642 | MHD_destroy_response(response); | |
643 | ||
644 | return r; | |
645 | } | |
646 | ||
7b17a7d7 LP |
647 | static int request_handler_redirect( |
648 | struct MHD_Connection *connection, | |
649 | const char *target) { | |
650 | ||
651 | char *page; | |
652 | struct MHD_Response *response; | |
653 | int ret; | |
654 | ||
655 | assert(connection); | |
fadd79d2 | 656 | assert(target); |
7b17a7d7 LP |
657 | |
658 | if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) | |
659 | return respond_oom(connection); | |
660 | ||
661 | response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); | |
662 | if (!response) { | |
663 | free(page); | |
664 | return respond_oom(connection); | |
665 | } | |
666 | ||
667 | MHD_add_response_header(response, "Content-Type", "text/html"); | |
668 | MHD_add_response_header(response, "Location", target); | |
669 | ||
670 | ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); | |
671 | MHD_destroy_response(response); | |
672 | ||
673 | return ret; | |
674 | } | |
675 | ||
676 | static int request_handler_file( | |
677 | struct MHD_Connection *connection, | |
678 | const char *path, | |
679 | const char *mime_type) { | |
680 | ||
681 | struct MHD_Response *response; | |
682 | int ret; | |
683 | _cleanup_close_ int fd = -1; | |
684 | struct stat st; | |
685 | ||
686 | assert(connection); | |
687 | assert(path); | |
688 | assert(mime_type); | |
689 | ||
690 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
691 | if (fd < 0) | |
e7216d11 | 692 | return mhd_respondf(connection, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m\n", path); |
7b17a7d7 LP |
693 | |
694 | if (fstat(fd, &st) < 0) | |
e7216d11 | 695 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m\n"); |
7b17a7d7 LP |
696 | |
697 | response = MHD_create_response_from_fd_at_offset(st.st_size, fd, 0); | |
698 | if (!response) | |
699 | return respond_oom(connection); | |
700 | ||
701 | fd = -1; | |
702 | ||
703 | MHD_add_response_header(response, "Content-Type", mime_type); | |
704 | ||
705 | ret = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
706 | MHD_destroy_response(response); | |
707 | ||
708 | return ret; | |
709 | } | |
710 | ||
a7edaadd | 711 | static int get_virtualization(char **v) { |
a7edaadd | 712 | _cleanup_bus_unref_ sd_bus *bus = NULL; |
39883f62 | 713 | char *b = NULL; |
a7edaadd LP |
714 | int r; |
715 | ||
76b54375 | 716 | r = sd_bus_default_system(&bus); |
a7edaadd LP |
717 | if (r < 0) |
718 | return r; | |
719 | ||
47c649b5 | 720 | r = sd_bus_get_property_string( |
a7edaadd LP |
721 | bus, |
722 | "org.freedesktop.systemd1", | |
723 | "/org/freedesktop/systemd1", | |
917b5dc7 | 724 | "org.freedesktop.systemd1.Manager", |
47c649b5 LP |
725 | "Virtualization", |
726 | NULL, | |
727 | &b); | |
a7edaadd LP |
728 | if (r < 0) |
729 | return r; | |
730 | ||
47c649b5 LP |
731 | if (isempty(b)) { |
732 | free(b); | |
a7edaadd LP |
733 | *v = NULL; |
734 | return 0; | |
735 | } | |
736 | ||
a7edaadd LP |
737 | *v = b; |
738 | return 1; | |
739 | } | |
740 | ||
7b17a7d7 LP |
741 | static int request_handler_machine( |
742 | struct MHD_Connection *connection, | |
8530a143 | 743 | void *connection_cls) { |
7b17a7d7 LP |
744 | |
745 | struct MHD_Response *response; | |
8530a143 | 746 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
747 | int r; |
748 | _cleanup_free_ char* hostname = NULL, *os_name = NULL; | |
a7f7d1bd | 749 | uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0; |
7b17a7d7 LP |
750 | char *json; |
751 | sd_id128_t mid, bid; | |
a7edaadd | 752 | _cleanup_free_ char *v = NULL; |
7b17a7d7 LP |
753 | |
754 | assert(connection); | |
8530a143 | 755 | assert(m); |
7b17a7d7 LP |
756 | |
757 | r = open_journal(m); | |
758 | if (r < 0) | |
e7216d11 | 759 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %s\n", strerror(-r)); |
7b17a7d7 LP |
760 | |
761 | r = sd_id128_get_machine(&mid); | |
762 | if (r < 0) | |
e7216d11 | 763 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %s\n", strerror(-r)); |
7b17a7d7 LP |
764 | |
765 | r = sd_id128_get_boot(&bid); | |
766 | if (r < 0) | |
e7216d11 | 767 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %s\n", strerror(-r)); |
7b17a7d7 LP |
768 | |
769 | hostname = gethostname_malloc(); | |
770 | if (!hostname) | |
771 | return respond_oom(connection); | |
772 | ||
773 | r = sd_journal_get_usage(m->journal, &usage); | |
774 | if (r < 0) | |
e7216d11 | 775 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); |
7b17a7d7 LP |
776 | |
777 | r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); | |
778 | if (r < 0) | |
e7216d11 | 779 | return mhd_respondf(connection, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %s\n", strerror(-r)); |
7b17a7d7 | 780 | |
5ae4d543 | 781 | if (parse_env_file("/etc/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL) == -ENOENT) |
e51728b0 | 782 | (void) parse_env_file("/usr/lib/os-release", NEWLINE, "PRETTY_NAME", &os_name, NULL); |
7b17a7d7 | 783 | |
a7edaadd | 784 | get_virtualization(&v); |
7b17a7d7 LP |
785 | |
786 | r = asprintf(&json, | |
787 | "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
788 | "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
789 | "\"hostname\" : \"%s\"," | |
790 | "\"os_pretty_name\" : \"%s\"," | |
791 | "\"virtualization\" : \"%s\"," | |
507f22bd ZJS |
792 | "\"usage\" : \"%"PRIu64"\"," |
793 | "\"cutoff_from_realtime\" : \"%"PRIu64"\"," | |
794 | "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", | |
7b17a7d7 LP |
795 | SD_ID128_FORMAT_VAL(mid), |
796 | SD_ID128_FORMAT_VAL(bid), | |
ae691c1d | 797 | hostname_cleanup(hostname), |
7b17a7d7 | 798 | os_name ? os_name : "Linux", |
a7edaadd | 799 | v ? v : "bare", |
507f22bd ZJS |
800 | usage, |
801 | cutoff_from, | |
802 | cutoff_to); | |
7b17a7d7 LP |
803 | |
804 | if (r < 0) | |
805 | return respond_oom(connection); | |
806 | ||
807 | response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); | |
808 | if (!response) { | |
809 | free(json); | |
810 | return respond_oom(connection); | |
811 | } | |
812 | ||
813 | MHD_add_response_header(response, "Content-Type", "application/json"); | |
814 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
815 | MHD_destroy_response(response); | |
816 | ||
817 | return r; | |
818 | } | |
819 | ||
820 | static int request_handler( | |
821 | void *cls, | |
822 | struct MHD_Connection *connection, | |
823 | const char *url, | |
824 | const char *method, | |
825 | const char *version, | |
826 | const char *upload_data, | |
827 | size_t *upload_data_size, | |
828 | void **connection_cls) { | |
f12be7e8 | 829 | int r, code; |
7b17a7d7 LP |
830 | |
831 | assert(connection); | |
8530a143 | 832 | assert(connection_cls); |
7b17a7d7 LP |
833 | assert(url); |
834 | assert(method); | |
835 | ||
836 | if (!streq(method, "GET")) | |
e7216d11 ZJS |
837 | return mhd_respond(connection, MHD_HTTP_METHOD_NOT_ACCEPTABLE, |
838 | "Unsupported method.\n"); | |
a93035ce | 839 | |
7b17a7d7 | 840 | |
8530a143 ZJS |
841 | if (!*connection_cls) { |
842 | if (!request_meta(connection_cls)) | |
843 | return respond_oom(connection); | |
844 | return MHD_YES; | |
845 | } | |
846 | ||
2cf4172a | 847 | if (arg_trust_pem) { |
8201af08 | 848 | r = check_permissions(connection, &code, NULL); |
f12be7e8 ZJS |
849 | if (r < 0) |
850 | return code; | |
851 | } | |
852 | ||
7b17a7d7 LP |
853 | if (streq(url, "/")) |
854 | return request_handler_redirect(connection, "/browse"); | |
855 | ||
856 | if (streq(url, "/entries")) | |
8530a143 | 857 | return request_handler_entries(connection, *connection_cls); |
7b17a7d7 | 858 | |
240a5fe8 | 859 | if (startswith(url, "/fields/")) |
8530a143 | 860 | return request_handler_fields(connection, url + 8, *connection_cls); |
240a5fe8 | 861 | |
7b17a7d7 LP |
862 | if (streq(url, "/browse")) |
863 | return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); | |
864 | ||
865 | if (streq(url, "/machine")) | |
8530a143 | 866 | return request_handler_machine(connection, *connection_cls); |
7b17a7d7 | 867 | |
e7216d11 | 868 | return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found.\n"); |
7b17a7d7 LP |
869 | } |
870 | ||
601185b4 | 871 | static void help(void) { |
c3a7cfb7 ZJS |
872 | printf("%s [OPTIONS...] ...\n\n" |
873 | "HTTP server for journal events.\n\n" | |
874 | " -h --help Show this help\n" | |
875 | " --version Show package version\n" | |
e5ebe12b ZJS |
876 | " --cert=CERT.PEM Server certificate in PEM format\n" |
877 | " --key=KEY.PEM Server key in PEM format\n" | |
878 | " --trust=CERT.PEM Certificat authority certificate in PEM format\n", | |
c3a7cfb7 | 879 | program_invocation_short_name); |
c3a7cfb7 ZJS |
880 | } |
881 | ||
858634ff ZJS |
882 | static int parse_argv(int argc, char *argv[]) { |
883 | enum { | |
884 | ARG_VERSION = 0x100, | |
885 | ARG_KEY, | |
886 | ARG_CERT, | |
e5ebe12b | 887 | ARG_TRUST, |
858634ff ZJS |
888 | }; |
889 | ||
890 | int r, c; | |
891 | ||
892 | static const struct option options[] = { | |
c3a7cfb7 | 893 | { "help", no_argument, NULL, 'h' }, |
858634ff ZJS |
894 | { "version", no_argument, NULL, ARG_VERSION }, |
895 | { "key", required_argument, NULL, ARG_KEY }, | |
896 | { "cert", required_argument, NULL, ARG_CERT }, | |
e5ebe12b | 897 | { "trust", required_argument, NULL, ARG_TRUST }, |
eb9da376 | 898 | {} |
858634ff ZJS |
899 | }; |
900 | ||
901 | assert(argc >= 0); | |
902 | assert(argv); | |
903 | ||
c3a7cfb7 | 904 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) |
eb9da376 | 905 | |
858634ff | 906 | switch(c) { |
eb9da376 LP |
907 | |
908 | case 'h': | |
601185b4 ZJS |
909 | help(); |
910 | return 0; | |
eb9da376 | 911 | |
858634ff ZJS |
912 | case ARG_VERSION: |
913 | puts(PACKAGE_STRING); | |
914 | puts(SYSTEMD_FEATURES); | |
915 | return 0; | |
916 | ||
917 | case ARG_KEY: | |
2cf4172a | 918 | if (arg_key_pem) { |
858634ff ZJS |
919 | log_error("Key file specified twice"); |
920 | return -EINVAL; | |
921 | } | |
2cf4172a | 922 | r = read_full_file(optarg, &arg_key_pem, NULL); |
23bbb0de MS |
923 | if (r < 0) |
924 | return log_error_errno(r, "Failed to read key file: %m"); | |
2cf4172a | 925 | assert(arg_key_pem); |
858634ff | 926 | break; |
7b17a7d7 | 927 | |
858634ff | 928 | case ARG_CERT: |
2cf4172a | 929 | if (arg_cert_pem) { |
858634ff ZJS |
930 | log_error("Certificate file specified twice"); |
931 | return -EINVAL; | |
932 | } | |
2cf4172a | 933 | r = read_full_file(optarg, &arg_cert_pem, NULL); |
23bbb0de MS |
934 | if (r < 0) |
935 | return log_error_errno(r, "Failed to read certificate file: %m"); | |
2cf4172a | 936 | assert(arg_cert_pem); |
858634ff ZJS |
937 | break; |
938 | ||
e5ebe12b | 939 | case ARG_TRUST: |
f12be7e8 | 940 | #ifdef HAVE_GNUTLS |
2cf4172a | 941 | if (arg_trust_pem) { |
e5ebe12b ZJS |
942 | log_error("CA certificate file specified twice"); |
943 | return -EINVAL; | |
944 | } | |
2cf4172a | 945 | r = read_full_file(optarg, &arg_trust_pem, NULL); |
23bbb0de MS |
946 | if (r < 0) |
947 | return log_error_errno(r, "Failed to read CA certificate file: %m"); | |
2cf4172a | 948 | assert(arg_trust_pem); |
e5ebe12b | 949 | break; |
f12be7e8 ZJS |
950 | #else |
951 | log_error("Option --trust is not available."); | |
952 | #endif | |
e5ebe12b | 953 | |
858634ff ZJS |
954 | case '?': |
955 | return -EINVAL; | |
956 | ||
957 | default: | |
eb9da376 | 958 | assert_not_reached("Unhandled option"); |
858634ff ZJS |
959 | } |
960 | ||
961 | if (optind < argc) { | |
7b17a7d7 | 962 | log_error("This program does not take arguments."); |
858634ff ZJS |
963 | return -EINVAL; |
964 | } | |
965 | ||
2cf4172a | 966 | if (!!arg_key_pem != !!arg_cert_pem) { |
858634ff ZJS |
967 | log_error("Certificate and key files must be specified together"); |
968 | return -EINVAL; | |
7b17a7d7 LP |
969 | } |
970 | ||
2cf4172a | 971 | if (arg_trust_pem && !arg_key_pem) { |
e5ebe12b ZJS |
972 | log_error("CA certificate can only be used with certificate file"); |
973 | return -EINVAL; | |
974 | } | |
975 | ||
858634ff ZJS |
976 | return 1; |
977 | } | |
978 | ||
979 | int main(int argc, char *argv[]) { | |
980 | struct MHD_Daemon *d = NULL; | |
981 | int r, n; | |
982 | ||
77ad3b93 | 983 | log_set_target(LOG_TARGET_AUTO); |
7b17a7d7 LP |
984 | log_parse_environment(); |
985 | log_open(); | |
986 | ||
858634ff ZJS |
987 | r = parse_argv(argc, argv); |
988 | if (r < 0) | |
989 | return EXIT_FAILURE; | |
990 | if (r == 0) | |
991 | return EXIT_SUCCESS; | |
992 | ||
2cf4172a LP |
993 | sigbus_install(); |
994 | ||
d357562c ZJS |
995 | r = setup_gnutls_logger(NULL); |
996 | if (r < 0) | |
997 | return EXIT_FAILURE; | |
cafc7f91 | 998 | |
7b17a7d7 LP |
999 | n = sd_listen_fds(1); |
1000 | if (n < 0) { | |
da927ba9 | 1001 | log_error_errno(n, "Failed to determine passed sockets: %m"); |
7b17a7d7 LP |
1002 | goto finish; |
1003 | } else if (n > 1) { | |
1004 | log_error("Can't listen on more than one socket."); | |
1005 | goto finish; | |
7b17a7d7 | 1006 | } else { |
c54ff8e3 ZJS |
1007 | struct MHD_OptionItem opts[] = { |
1008 | { MHD_OPTION_NOTIFY_COMPLETED, | |
1009 | (intptr_t) request_meta_free, NULL }, | |
e64690a8 ZJS |
1010 | { MHD_OPTION_EXTERNAL_LOGGER, |
1011 | (intptr_t) microhttpd_logger, NULL }, | |
c54ff8e3 | 1012 | { MHD_OPTION_END, 0, NULL }, |
858634ff ZJS |
1013 | { MHD_OPTION_END, 0, NULL }, |
1014 | { MHD_OPTION_END, 0, NULL }, | |
e5ebe12b | 1015 | { MHD_OPTION_END, 0, NULL }, |
c54ff8e3 | 1016 | { MHD_OPTION_END, 0, NULL }}; |
e64690a8 | 1017 | int opts_pos = 2; |
858634ff ZJS |
1018 | int flags = MHD_USE_THREAD_PER_CONNECTION|MHD_USE_POLL|MHD_USE_DEBUG; |
1019 | ||
c54ff8e3 | 1020 | if (n > 0) |
858634ff ZJS |
1021 | opts[opts_pos++] = (struct MHD_OptionItem) |
1022 | {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; | |
2cf4172a LP |
1023 | if (arg_key_pem) { |
1024 | assert(arg_cert_pem); | |
858634ff | 1025 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1026 | {MHD_OPTION_HTTPS_MEM_KEY, 0, arg_key_pem}; |
858634ff | 1027 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1028 | {MHD_OPTION_HTTPS_MEM_CERT, 0, arg_cert_pem}; |
858634ff ZJS |
1029 | flags |= MHD_USE_SSL; |
1030 | } | |
2cf4172a | 1031 | if (arg_trust_pem) { |
e5ebe12b ZJS |
1032 | assert(flags & MHD_USE_SSL); |
1033 | opts[opts_pos++] = (struct MHD_OptionItem) | |
2cf4172a | 1034 | {MHD_OPTION_HTTPS_MEM_TRUST, 0, arg_trust_pem}; |
e5ebe12b | 1035 | } |
858634ff ZJS |
1036 | |
1037 | d = MHD_start_daemon(flags, 19531, | |
1038 | NULL, NULL, | |
1039 | request_handler, NULL, | |
1040 | MHD_OPTION_ARRAY, opts, | |
1041 | MHD_OPTION_END); | |
7b17a7d7 LP |
1042 | } |
1043 | ||
6374a73b | 1044 | if (!d) { |
7b17a7d7 LP |
1045 | log_error("Failed to start daemon!"); |
1046 | goto finish; | |
1047 | } | |
1048 | ||
1049 | pause(); | |
1050 | ||
1051 | r = EXIT_SUCCESS; | |
1052 | ||
1053 | finish: | |
6374a73b ZJS |
1054 | if (d) |
1055 | MHD_stop_daemon(d); | |
7b17a7d7 LP |
1056 | |
1057 | return r; | |
1058 | } |