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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
7b17a7d7 | 2 | |
7b17a7d7 | 3 | #include <fcntl.h> |
858634ff | 4 | #include <getopt.h> |
3ffd4af2 LP |
5 | #include <microhttpd.h> |
6 | #include <stdlib.h> | |
7 | #include <string.h> | |
8 | #include <unistd.h> | |
f12be7e8 | 9 | |
a7edaadd | 10 | #include "sd-bus.h" |
3ffd4af2 LP |
11 | #include "sd-daemon.h" |
12 | #include "sd-journal.h" | |
3f6fd1ba | 13 | |
b5efdb8a | 14 | #include "alloc-util.h" |
40ca29a1 | 15 | #include "bus-util.h" |
3ffd4af2 | 16 | #include "fd-util.h" |
3f6fd1ba LP |
17 | #include "fileio.h" |
18 | #include "hostname-util.h" | |
19 | #include "log.h" | |
7b17a7d7 | 20 | #include "logs-show.h" |
e64690a8 | 21 | #include "microhttpd-util.h" |
d58ad743 | 22 | #include "os-util.h" |
6bedfcbb | 23 | #include "parse-util.h" |
2cf4172a | 24 | #include "sigbus.h" |
3f6fd1ba | 25 | #include "util.h" |
7b17a7d7 | 26 | |
11bb5147 DD |
27 | #define JOURNAL_WAIT_TIMEOUT (10*USEC_PER_SEC) |
28 | ||
2cf4172a LP |
29 | static char *arg_key_pem = NULL; |
30 | static char *arg_cert_pem = NULL; | |
31 | static char *arg_trust_pem = NULL; | |
1aa1e59c | 32 | static char *arg_directory = NULL; |
f12be7e8 | 33 | |
7b17a7d7 LP |
34 | typedef struct RequestMeta { |
35 | sd_journal *journal; | |
36 | ||
37 | OutputMode mode; | |
38 | ||
39 | char *cursor; | |
40 | int64_t n_skip; | |
41 | uint64_t n_entries; | |
42 | bool n_entries_set; | |
43 | ||
44 | FILE *tmp; | |
45 | uint64_t delta, size; | |
98206c93 LP |
46 | |
47 | int argument_parse_error; | |
7a69007a LP |
48 | |
49 | bool follow; | |
c6511e85 | 50 | bool discrete; |
240a5fe8 LP |
51 | |
52 | uint64_t n_fields; | |
53 | bool n_fields_set; | |
7b17a7d7 LP |
54 | } RequestMeta; |
55 | ||
56 | static const char* const mime_types[_OUTPUT_MODE_MAX] = { | |
57 | [OUTPUT_SHORT] = "text/plain", | |
58 | [OUTPUT_JSON] = "application/json", | |
48383c25 LP |
59 | [OUTPUT_JSON_SSE] = "text/event-stream", |
60 | [OUTPUT_EXPORT] = "application/vnd.fdo.journal", | |
7b17a7d7 LP |
61 | }; |
62 | ||
63 | static RequestMeta *request_meta(void **connection_cls) { | |
64 | RequestMeta *m; | |
65 | ||
fdfccdbc | 66 | assert(connection_cls); |
7b17a7d7 LP |
67 | if (*connection_cls) |
68 | return *connection_cls; | |
69 | ||
70 | m = new0(RequestMeta, 1); | |
71 | if (!m) | |
72 | return NULL; | |
73 | ||
74 | *connection_cls = m; | |
75 | return m; | |
76 | } | |
77 | ||
78 | static void request_meta_free( | |
79 | void *cls, | |
80 | struct MHD_Connection *connection, | |
81 | void **connection_cls, | |
82 | enum MHD_RequestTerminationCode toe) { | |
83 | ||
84 | RequestMeta *m = *connection_cls; | |
85 | ||
86 | if (!m) | |
87 | return; | |
88 | ||
3e044c49 | 89 | sd_journal_close(m->journal); |
7b17a7d7 | 90 | |
74ca738f | 91 | safe_fclose(m->tmp); |
7b17a7d7 LP |
92 | |
93 | free(m->cursor); | |
94 | free(m); | |
95 | } | |
96 | ||
97 | static int open_journal(RequestMeta *m) { | |
98 | assert(m); | |
99 | ||
100 | if (m->journal) | |
101 | return 0; | |
102 | ||
1aa1e59c YE |
103 | if (arg_directory) |
104 | return sd_journal_open_directory(&m->journal, arg_directory, 0); | |
105 | else | |
106 | return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); | |
7b17a7d7 LP |
107 | } |
108 | ||
cc02a7b3 | 109 | static int request_meta_ensure_tmp(RequestMeta *m) { |
03532f0a LP |
110 | assert(m); |
111 | ||
cc02a7b3 ZJS |
112 | if (m->tmp) |
113 | rewind(m->tmp); | |
114 | else { | |
115 | int fd; | |
116 | ||
03532f0a | 117 | fd = open_tmpfile_unlinkable("/tmp", O_RDWR|O_CLOEXEC); |
cc02a7b3 ZJS |
118 | if (fd < 0) |
119 | return fd; | |
120 | ||
9e19c04f | 121 | m->tmp = fdopen(fd, "w+"); |
cc02a7b3 ZJS |
122 | if (!m->tmp) { |
123 | safe_close(fd); | |
124 | return -errno; | |
125 | } | |
126 | } | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
7b17a7d7 LP |
131 | static ssize_t request_reader_entries( |
132 | void *cls, | |
133 | uint64_t pos, | |
134 | char *buf, | |
135 | size_t max) { | |
136 | ||
137 | RequestMeta *m = cls; | |
138 | int r; | |
139 | size_t n, k; | |
140 | ||
141 | assert(m); | |
142 | assert(buf); | |
143 | assert(max > 0); | |
144 | assert(pos >= m->delta); | |
145 | ||
146 | pos -= m->delta; | |
147 | ||
148 | while (pos >= m->size) { | |
149 | off_t sz; | |
150 | ||
151 | /* End of this entry, so let's serialize the next | |
152 | * one */ | |
153 | ||
154 | if (m->n_entries_set && | |
155 | m->n_entries <= 0) | |
156 | return MHD_CONTENT_READER_END_OF_STREAM; | |
157 | ||
77ad3b93 LP |
158 | if (m->n_skip < 0) |
159 | r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); | |
160 | else if (m->n_skip > 0) | |
7b17a7d7 LP |
161 | r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
162 | else | |
163 | r = sd_journal_next(m->journal); | |
164 | ||
165 | if (r < 0) { | |
da927ba9 | 166 | log_error_errno(r, "Failed to advance journal pointer: %m"); |
7b17a7d7 | 167 | return MHD_CONTENT_READER_END_WITH_ERROR; |
7a69007a LP |
168 | } else if (r == 0) { |
169 | ||
170 | if (m->follow) { | |
11bb5147 | 171 | r = sd_journal_wait(m->journal, (uint64_t) JOURNAL_WAIT_TIMEOUT); |
7a69007a | 172 | if (r < 0) { |
da927ba9 | 173 | log_error_errno(r, "Couldn't wait for journal event: %m"); |
7a69007a LP |
174 | return MHD_CONTENT_READER_END_WITH_ERROR; |
175 | } | |
11bb5147 DD |
176 | if (r == SD_JOURNAL_NOP) |
177 | break; | |
7a69007a LP |
178 | |
179 | continue; | |
180 | } | |
181 | ||
7b17a7d7 | 182 | return MHD_CONTENT_READER_END_OF_STREAM; |
7a69007a | 183 | } |
7b17a7d7 | 184 | |
c6511e85 LP |
185 | if (m->discrete) { |
186 | assert(m->cursor); | |
187 | ||
188 | r = sd_journal_test_cursor(m->journal, m->cursor); | |
189 | if (r < 0) { | |
da927ba9 | 190 | log_error_errno(r, "Failed to test cursor: %m"); |
c6511e85 LP |
191 | return MHD_CONTENT_READER_END_WITH_ERROR; |
192 | } | |
193 | ||
194 | if (r == 0) | |
195 | return MHD_CONTENT_READER_END_OF_STREAM; | |
196 | } | |
197 | ||
7b17a7d7 LP |
198 | pos -= m->size; |
199 | m->delta += m->size; | |
200 | ||
201 | if (m->n_entries_set) | |
202 | m->n_entries -= 1; | |
203 | ||
204 | m->n_skip = 0; | |
205 | ||
cc02a7b3 ZJS |
206 | r = request_meta_ensure_tmp(m); |
207 | if (r < 0) { | |
208 | log_error_errno(r, "Failed to create temporary file: %m"); | |
209 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
7b17a7d7 LP |
210 | } |
211 | ||
9b972c9a | 212 | r = show_journal_entry(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, |
b4766d5f | 213 | NULL, NULL, NULL); |
7b17a7d7 | 214 | if (r < 0) { |
da927ba9 | 215 | log_error_errno(r, "Failed to serialize item: %m"); |
7b17a7d7 LP |
216 | return MHD_CONTENT_READER_END_WITH_ERROR; |
217 | } | |
218 | ||
219 | sz = ftello(m->tmp); | |
220 | if (sz == (off_t) -1) { | |
56f64d95 | 221 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
7b17a7d7 LP |
222 | return MHD_CONTENT_READER_END_WITH_ERROR; |
223 | } | |
224 | ||
225 | m->size = (uint64_t) sz; | |
226 | } | |
227 | ||
3475fc58 YE |
228 | if (m->tmp == NULL && m->follow) |
229 | return 0; | |
230 | ||
7b17a7d7 | 231 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { |
56f64d95 | 232 | log_error_errno(errno, "Failed to seek to position: %m"); |
7b17a7d7 LP |
233 | return MHD_CONTENT_READER_END_WITH_ERROR; |
234 | } | |
235 | ||
236 | n = m->size - pos; | |
11bb5147 DD |
237 | if (n < 1) |
238 | return 0; | |
7b17a7d7 LP |
239 | if (n > max) |
240 | n = max; | |
241 | ||
242 | errno = 0; | |
243 | k = fread(buf, 1, n, m->tmp); | |
244 | if (k != n) { | |
245 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
246 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
247 | } | |
248 | ||
249 | return (ssize_t) k; | |
250 | } | |
251 | ||
252 | static int request_parse_accept( | |
253 | RequestMeta *m, | |
254 | struct MHD_Connection *connection) { | |
255 | ||
6374a73b | 256 | const char *header; |
7b17a7d7 LP |
257 | |
258 | assert(m); | |
259 | assert(connection); | |
260 | ||
6374a73b ZJS |
261 | header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
262 | if (!header) | |
7b17a7d7 LP |
263 | return 0; |
264 | ||
6374a73b | 265 | if (streq(header, mime_types[OUTPUT_JSON])) |
7b17a7d7 | 266 | m->mode = OUTPUT_JSON; |
6374a73b | 267 | else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
48383c25 | 268 | m->mode = OUTPUT_JSON_SSE; |
6374a73b | 269 | else if (streq(header, mime_types[OUTPUT_EXPORT])) |
7b17a7d7 LP |
270 | m->mode = OUTPUT_EXPORT; |
271 | else | |
272 | m->mode = OUTPUT_SHORT; | |
273 | ||
274 | return 0; | |
275 | } | |
276 | ||
277 | static int request_parse_range( | |
278 | RequestMeta *m, | |
279 | struct MHD_Connection *connection) { | |
280 | ||
281 | const char *range, *colon, *colon2; | |
282 | int r; | |
283 | ||
284 | assert(m); | |
285 | assert(connection); | |
286 | ||
287 | range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); | |
288 | if (!range) | |
289 | return 0; | |
290 | ||
291 | if (!startswith(range, "entries=")) | |
292 | return 0; | |
293 | ||
294 | range += 8; | |
295 | range += strspn(range, WHITESPACE); | |
296 | ||
297 | colon = strchr(range, ':'); | |
298 | if (!colon) | |
299 | m->cursor = strdup(range); | |
300 | else { | |
301 | const char *p; | |
302 | ||
303 | colon2 = strchr(colon + 1, ':'); | |
304 | if (colon2) { | |
7fd1b19b | 305 | _cleanup_free_ char *t; |
7b17a7d7 LP |
306 | |
307 | t = strndup(colon + 1, colon2 - colon - 1); | |
308 | if (!t) | |
309 | return -ENOMEM; | |
310 | ||
311 | r = safe_atoi64(t, &m->n_skip); | |
7b17a7d7 LP |
312 | if (r < 0) |
313 | return r; | |
314 | } | |
315 | ||
316 | p = (colon2 ? colon2 : colon) + 1; | |
317 | if (*p) { | |
318 | r = safe_atou64(p, &m->n_entries); | |
319 | if (r < 0) | |
320 | return r; | |
321 | ||
322 | if (m->n_entries <= 0) | |
323 | return -EINVAL; | |
324 | ||
325 | m->n_entries_set = true; | |
326 | } | |
327 | ||
328 | m->cursor = strndup(range, colon - range); | |
329 | } | |
330 | ||
331 | if (!m->cursor) | |
332 | return -ENOMEM; | |
333 | ||
334 | m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; | |
ece174c5 | 335 | if (isempty(m->cursor)) |
a1e58e8e | 336 | m->cursor = mfree(m->cursor); |
7b17a7d7 LP |
337 | |
338 | return 0; | |
339 | } | |
340 | ||
98206c93 LP |
341 | static int request_parse_arguments_iterator( |
342 | void *cls, | |
343 | enum MHD_ValueKind kind, | |
344 | const char *key, | |
345 | const char *value) { | |
346 | ||
347 | RequestMeta *m = cls; | |
348 | _cleanup_free_ char *p = NULL; | |
349 | int r; | |
350 | ||
351 | assert(m); | |
352 | ||
353 | if (isempty(key)) { | |
354 | m->argument_parse_error = -EINVAL; | |
355 | return MHD_NO; | |
356 | } | |
357 | ||
7a69007a LP |
358 | if (streq(key, "follow")) { |
359 | if (isempty(value)) { | |
360 | m->follow = true; | |
361 | return MHD_YES; | |
362 | } | |
363 | ||
364 | r = parse_boolean(value); | |
365 | if (r < 0) { | |
366 | m->argument_parse_error = r; | |
367 | return MHD_NO; | |
368 | } | |
369 | ||
370 | m->follow = r; | |
371 | return MHD_YES; | |
372 | } | |
373 | ||
c6511e85 LP |
374 | if (streq(key, "discrete")) { |
375 | if (isempty(value)) { | |
376 | m->discrete = true; | |
377 | return MHD_YES; | |
378 | } | |
379 | ||
380 | r = parse_boolean(value); | |
381 | if (r < 0) { | |
382 | m->argument_parse_error = r; | |
383 | return MHD_NO; | |
384 | } | |
385 | ||
386 | m->discrete = r; | |
387 | return MHD_YES; | |
388 | } | |
389 | ||
082d0180 LP |
390 | if (streq(key, "boot")) { |
391 | if (isempty(value)) | |
392 | r = true; | |
393 | else { | |
394 | r = parse_boolean(value); | |
395 | if (r < 0) { | |
396 | m->argument_parse_error = r; | |
397 | return MHD_NO; | |
398 | } | |
399 | } | |
400 | ||
401 | if (r) { | |
402 | char match[9 + 32 + 1] = "_BOOT_ID="; | |
403 | sd_id128_t bid; | |
404 | ||
405 | r = sd_id128_get_boot(&bid); | |
406 | if (r < 0) { | |
da927ba9 | 407 | log_error_errno(r, "Failed to get boot ID: %m"); |
082d0180 LP |
408 | return MHD_NO; |
409 | } | |
410 | ||
411 | sd_id128_to_string(bid, match + 9); | |
412 | r = sd_journal_add_match(m->journal, match, sizeof(match)-1); | |
413 | if (r < 0) { | |
414 | m->argument_parse_error = r; | |
415 | return MHD_NO; | |
416 | } | |
417 | } | |
418 | ||
419 | return MHD_YES; | |
420 | } | |
421 | ||
605405c6 | 422 | p = strjoin(key, "=", strempty(value)); |
98206c93 LP |
423 | if (!p) { |
424 | m->argument_parse_error = log_oom(); | |
425 | return MHD_NO; | |
426 | } | |
427 | ||
428 | r = sd_journal_add_match(m->journal, p, 0); | |
429 | if (r < 0) { | |
430 | m->argument_parse_error = r; | |
431 | return MHD_NO; | |
432 | } | |
433 | ||
434 | return MHD_YES; | |
435 | } | |
436 | ||
437 | static int request_parse_arguments( | |
438 | RequestMeta *m, | |
439 | struct MHD_Connection *connection) { | |
440 | ||
441 | assert(m); | |
442 | assert(connection); | |
443 | ||
444 | m->argument_parse_error = 0; | |
445 | MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); | |
446 | ||
447 | return m->argument_parse_error; | |
448 | } | |
449 | ||
7b17a7d7 LP |
450 | static int request_handler_entries( |
451 | struct MHD_Connection *connection, | |
8530a143 | 452 | void *connection_cls) { |
7b17a7d7 LP |
453 | |
454 | struct MHD_Response *response; | |
8530a143 | 455 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
456 | int r; |
457 | ||
458 | assert(connection); | |
8530a143 | 459 | assert(m); |
7b17a7d7 LP |
460 | |
461 | r = open_journal(m); | |
462 | if (r < 0) | |
f5e757f1 | 463 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
7b17a7d7 LP |
464 | |
465 | if (request_parse_accept(m, connection) < 0) | |
f5e757f1 | 466 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header."); |
7b17a7d7 LP |
467 | |
468 | if (request_parse_range(m, connection) < 0) | |
f5e757f1 | 469 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header."); |
7b17a7d7 | 470 | |
98206c93 | 471 | if (request_parse_arguments(m, connection) < 0) |
f5e757f1 | 472 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments."); |
98206c93 | 473 | |
c6511e85 LP |
474 | if (m->discrete) { |
475 | if (!m->cursor) | |
f5e757f1 | 476 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification."); |
c6511e85 LP |
477 | |
478 | m->n_entries = 1; | |
479 | m->n_entries_set = true; | |
480 | } | |
481 | ||
7b17a7d7 LP |
482 | if (m->cursor) |
483 | r = sd_journal_seek_cursor(m->journal, m->cursor); | |
484 | else if (m->n_skip >= 0) | |
485 | r = sd_journal_seek_head(m->journal); | |
486 | else if (m->n_skip < 0) | |
487 | r = sd_journal_seek_tail(m->journal); | |
488 | if (r < 0) | |
f5e757f1 | 489 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal."); |
7b17a7d7 LP |
490 | |
491 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); | |
492 | if (!response) | |
493 | return respond_oom(connection); | |
494 | ||
495 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); | |
496 | ||
497 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
498 | MHD_destroy_response(response); | |
499 | ||
500 | return r; | |
501 | } | |
502 | ||
240a5fe8 LP |
503 | static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { |
504 | const char *eq; | |
505 | size_t j; | |
506 | ||
507 | eq = memchr(d, '=', l); | |
508 | if (!eq) | |
509 | return -EINVAL; | |
510 | ||
511 | j = l - (eq - d + 1); | |
512 | ||
513 | if (m == OUTPUT_JSON) { | |
514 | fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); | |
515 | json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); | |
516 | fputs(" }\n", f); | |
517 | } else { | |
518 | fwrite(eq+1, 1, j, f); | |
519 | fputc('\n', f); | |
520 | } | |
521 | ||
522 | return 0; | |
523 | } | |
524 | ||
525 | static ssize_t request_reader_fields( | |
526 | void *cls, | |
527 | uint64_t pos, | |
528 | char *buf, | |
529 | size_t max) { | |
530 | ||
531 | RequestMeta *m = cls; | |
532 | int r; | |
533 | size_t n, k; | |
534 | ||
535 | assert(m); | |
536 | assert(buf); | |
537 | assert(max > 0); | |
538 | assert(pos >= m->delta); | |
539 | ||
540 | pos -= m->delta; | |
541 | ||
542 | while (pos >= m->size) { | |
543 | off_t sz; | |
544 | const void *d; | |
545 | size_t l; | |
546 | ||
547 | /* End of this field, so let's serialize the next | |
548 | * one */ | |
549 | ||
550 | if (m->n_fields_set && | |
551 | m->n_fields <= 0) | |
552 | return MHD_CONTENT_READER_END_OF_STREAM; | |
553 | ||
554 | r = sd_journal_enumerate_unique(m->journal, &d, &l); | |
555 | if (r < 0) { | |
da927ba9 | 556 | log_error_errno(r, "Failed to advance field index: %m"); |
240a5fe8 LP |
557 | return MHD_CONTENT_READER_END_WITH_ERROR; |
558 | } else if (r == 0) | |
559 | return MHD_CONTENT_READER_END_OF_STREAM; | |
560 | ||
561 | pos -= m->size; | |
562 | m->delta += m->size; | |
563 | ||
564 | if (m->n_fields_set) | |
565 | m->n_fields -= 1; | |
566 | ||
cc02a7b3 ZJS |
567 | r = request_meta_ensure_tmp(m); |
568 | if (r < 0) { | |
569 | log_error_errno(r, "Failed to create temporary file: %m"); | |
570 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
240a5fe8 LP |
571 | } |
572 | ||
573 | r = output_field(m->tmp, m->mode, d, l); | |
574 | if (r < 0) { | |
da927ba9 | 575 | log_error_errno(r, "Failed to serialize item: %m"); |
240a5fe8 LP |
576 | return MHD_CONTENT_READER_END_WITH_ERROR; |
577 | } | |
578 | ||
579 | sz = ftello(m->tmp); | |
580 | if (sz == (off_t) -1) { | |
56f64d95 | 581 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
240a5fe8 LP |
582 | return MHD_CONTENT_READER_END_WITH_ERROR; |
583 | } | |
584 | ||
585 | m->size = (uint64_t) sz; | |
586 | } | |
587 | ||
588 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
56f64d95 | 589 | log_error_errno(errno, "Failed to seek to position: %m"); |
240a5fe8 LP |
590 | return MHD_CONTENT_READER_END_WITH_ERROR; |
591 | } | |
592 | ||
593 | n = m->size - pos; | |
594 | if (n > max) | |
595 | n = max; | |
596 | ||
597 | errno = 0; | |
598 | k = fread(buf, 1, n, m->tmp); | |
599 | if (k != n) { | |
600 | log_error("Failed to read from file: %s", errno ? strerror(errno) : "Premature EOF"); | |
601 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
602 | } | |
603 | ||
604 | return (ssize_t) k; | |
605 | } | |
606 | ||
607 | static int request_handler_fields( | |
608 | struct MHD_Connection *connection, | |
609 | const char *field, | |
610 | void *connection_cls) { | |
611 | ||
612 | struct MHD_Response *response; | |
8530a143 | 613 | RequestMeta *m = connection_cls; |
240a5fe8 LP |
614 | int r; |
615 | ||
616 | assert(connection); | |
8530a143 | 617 | assert(m); |
240a5fe8 LP |
618 | |
619 | r = open_journal(m); | |
620 | if (r < 0) | |
f5e757f1 | 621 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
240a5fe8 LP |
622 | |
623 | if (request_parse_accept(m, connection) < 0) | |
f5e757f1 | 624 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header."); |
240a5fe8 LP |
625 | |
626 | r = sd_journal_query_unique(m->journal, field); | |
627 | if (r < 0) | |
f5e757f1 | 628 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields."); |
240a5fe8 LP |
629 | |
630 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); | |
631 | if (!response) | |
632 | return respond_oom(connection); | |
633 | ||
634 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); | |
635 | ||
636 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
637 | MHD_destroy_response(response); | |
638 | ||
639 | return r; | |
640 | } | |
641 | ||
7b17a7d7 LP |
642 | static int request_handler_redirect( |
643 | struct MHD_Connection *connection, | |
644 | const char *target) { | |
645 | ||
646 | char *page; | |
647 | struct MHD_Response *response; | |
648 | int ret; | |
649 | ||
650 | assert(connection); | |
fadd79d2 | 651 | assert(target); |
7b17a7d7 LP |
652 | |
653 | if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) | |
654 | return respond_oom(connection); | |
655 | ||
656 | response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); | |
657 | if (!response) { | |
658 | free(page); | |
659 | return respond_oom(connection); | |
660 | } | |
661 | ||
662 | MHD_add_response_header(response, "Content-Type", "text/html"); | |
663 | MHD_add_response_header(response, "Location", target); | |
664 | ||
665 | ret = MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); | |
666 | MHD_destroy_response(response); | |
667 | ||
668 | return ret; | |
669 | } | |
670 | ||
671 | static int request_handler_file( | |
672 | struct MHD_Connection *connection, | |
673 | const char *path, | |
674 | const char *mime_type) { | |
675 | ||
676 | struct MHD_Response *response; | |
677 | int ret; | |
678 | _cleanup_close_ int fd = -1; | |
679 | struct stat st; | |
680 | ||
681 | assert(connection); | |
682 | assert(path); | |
683 | assert(mime_type); | |
684 | ||
685 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
686 | if (fd < 0) | |
f5e757f1 | 687 | return mhd_respondf(connection, errno, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m", path); |
7b17a7d7 LP |
688 | |
689 | if (fstat(fd, &st) < 0) | |
f5e757f1 | 690 | return mhd_respondf(connection, errno, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m"); |
7b17a7d7 | 691 | |
da0a9a33 | 692 | response = MHD_create_response_from_fd_at_offset64(st.st_size, fd, 0); |
7b17a7d7 LP |
693 | if (!response) |
694 | return respond_oom(connection); | |
695 | ||
696 | fd = -1; | |
697 | ||
698 | MHD_add_response_header(response, "Content-Type", mime_type); | |
699 | ||
700 | ret = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
701 | MHD_destroy_response(response); | |
702 | ||
703 | return ret; | |
704 | } | |
705 | ||
a7edaadd | 706 | static int get_virtualization(char **v) { |
4afd3348 | 707 | _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL; |
39883f62 | 708 | char *b = NULL; |
a7edaadd LP |
709 | int r; |
710 | ||
76b54375 | 711 | r = sd_bus_default_system(&bus); |
a7edaadd LP |
712 | if (r < 0) |
713 | return r; | |
714 | ||
47c649b5 | 715 | r = sd_bus_get_property_string( |
a7edaadd LP |
716 | bus, |
717 | "org.freedesktop.systemd1", | |
718 | "/org/freedesktop/systemd1", | |
917b5dc7 | 719 | "org.freedesktop.systemd1.Manager", |
47c649b5 LP |
720 | "Virtualization", |
721 | NULL, | |
722 | &b); | |
a7edaadd LP |
723 | if (r < 0) |
724 | return r; | |
725 | ||
47c649b5 LP |
726 | if (isempty(b)) { |
727 | free(b); | |
a7edaadd LP |
728 | *v = NULL; |
729 | return 0; | |
730 | } | |
731 | ||
a7edaadd LP |
732 | *v = b; |
733 | return 1; | |
734 | } | |
735 | ||
7b17a7d7 LP |
736 | static int request_handler_machine( |
737 | struct MHD_Connection *connection, | |
8530a143 | 738 | void *connection_cls) { |
7b17a7d7 LP |
739 | |
740 | struct MHD_Response *response; | |
8530a143 | 741 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
742 | int r; |
743 | _cleanup_free_ char* hostname = NULL, *os_name = NULL; | |
a7f7d1bd | 744 | uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0; |
7b17a7d7 LP |
745 | char *json; |
746 | sd_id128_t mid, bid; | |
a7edaadd | 747 | _cleanup_free_ char *v = NULL; |
7b17a7d7 LP |
748 | |
749 | assert(connection); | |
8530a143 | 750 | assert(m); |
7b17a7d7 LP |
751 | |
752 | r = open_journal(m); | |
753 | if (r < 0) | |
f5e757f1 | 754 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
7b17a7d7 LP |
755 | |
756 | r = sd_id128_get_machine(&mid); | |
757 | if (r < 0) | |
f5e757f1 | 758 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %m"); |
7b17a7d7 LP |
759 | |
760 | r = sd_id128_get_boot(&bid); | |
761 | if (r < 0) | |
f5e757f1 | 762 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %m"); |
7b17a7d7 LP |
763 | |
764 | hostname = gethostname_malloc(); | |
765 | if (!hostname) | |
766 | return respond_oom(connection); | |
767 | ||
768 | r = sd_journal_get_usage(m->journal, &usage); | |
769 | if (r < 0) | |
e4662e55 | 770 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %m"); |
7b17a7d7 LP |
771 | |
772 | r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); | |
773 | if (r < 0) | |
e4662e55 | 774 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %m"); |
7b17a7d7 | 775 | |
d58ad743 LP |
776 | (void) parse_os_release(NULL, "PRETTY_NAME", &os_name, NULL); |
777 | (void) get_virtualization(&v); | |
7b17a7d7 LP |
778 | |
779 | r = asprintf(&json, | |
780 | "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
781 | "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
782 | "\"hostname\" : \"%s\"," | |
783 | "\"os_pretty_name\" : \"%s\"," | |
784 | "\"virtualization\" : \"%s\"," | |
507f22bd ZJS |
785 | "\"usage\" : \"%"PRIu64"\"," |
786 | "\"cutoff_from_realtime\" : \"%"PRIu64"\"," | |
787 | "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", | |
7b17a7d7 LP |
788 | SD_ID128_FORMAT_VAL(mid), |
789 | SD_ID128_FORMAT_VAL(bid), | |
ae691c1d | 790 | hostname_cleanup(hostname), |
7b17a7d7 | 791 | os_name ? os_name : "Linux", |
a7edaadd | 792 | v ? v : "bare", |
507f22bd ZJS |
793 | usage, |
794 | cutoff_from, | |
795 | cutoff_to); | |
7b17a7d7 LP |
796 | |
797 | if (r < 0) | |
798 | return respond_oom(connection); | |
799 | ||
800 | response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); | |
801 | if (!response) { | |
802 | free(json); | |
803 | return respond_oom(connection); | |
804 | } | |
805 | ||
806 | MHD_add_response_header(response, "Content-Type", "application/json"); | |
807 | r = MHD_queue_response(connection, MHD_HTTP_OK, response); | |
808 | MHD_destroy_response(response); | |
809 | ||
810 | return r; | |
811 | } | |
812 | ||
813 | static int request_handler( | |
814 | void *cls, | |
815 | struct MHD_Connection *connection, | |
816 | const char *url, | |
817 | const char *method, | |
818 | const char *version, | |
819 | const char *upload_data, | |
820 | size_t *upload_data_size, | |
821 | void **connection_cls) { | |
f12be7e8 | 822 | int r, code; |
7b17a7d7 LP |
823 | |
824 | assert(connection); | |
8530a143 | 825 | assert(connection_cls); |
7b17a7d7 LP |
826 | assert(url); |
827 | assert(method); | |
828 | ||
829 | if (!streq(method, "GET")) | |
f5e757f1 | 830 | return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method."); |
a93035ce | 831 | |
8530a143 ZJS |
832 | if (!*connection_cls) { |
833 | if (!request_meta(connection_cls)) | |
834 | return respond_oom(connection); | |
835 | return MHD_YES; | |
836 | } | |
837 | ||
2cf4172a | 838 | if (arg_trust_pem) { |
8201af08 | 839 | r = check_permissions(connection, &code, NULL); |
f12be7e8 ZJS |
840 | if (r < 0) |
841 | return code; | |
842 | } | |
843 | ||
7b17a7d7 LP |
844 | if (streq(url, "/")) |
845 | return request_handler_redirect(connection, "/browse"); | |
846 | ||
847 | if (streq(url, "/entries")) | |
8530a143 | 848 | return request_handler_entries(connection, *connection_cls); |
7b17a7d7 | 849 | |
240a5fe8 | 850 | if (startswith(url, "/fields/")) |
8530a143 | 851 | return request_handler_fields(connection, url + 8, *connection_cls); |
240a5fe8 | 852 | |
7b17a7d7 LP |
853 | if (streq(url, "/browse")) |
854 | return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); | |
855 | ||
856 | if (streq(url, "/machine")) | |
8530a143 | 857 | return request_handler_machine(connection, *connection_cls); |
7b17a7d7 | 858 | |
f5e757f1 | 859 | return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found."); |
7b17a7d7 LP |
860 | } |
861 | ||
601185b4 | 862 | static void help(void) { |
c3a7cfb7 ZJS |
863 | printf("%s [OPTIONS...] ...\n\n" |
864 | "HTTP server for journal events.\n\n" | |
865 | " -h --help Show this help\n" | |
866 | " --version Show package version\n" | |
e5ebe12b ZJS |
867 | " --cert=CERT.PEM Server certificate in PEM format\n" |
868 | " --key=KEY.PEM Server key in PEM format\n" | |
5a507f8c | 869 | " --trust=CERT.PEM Certificate authority certificate in PEM format\n" |
1aa1e59c | 870 | " -D --directory=PATH Serve journal files in directory\n", |
c3a7cfb7 | 871 | program_invocation_short_name); |
c3a7cfb7 ZJS |
872 | } |
873 | ||
858634ff ZJS |
874 | static int parse_argv(int argc, char *argv[]) { |
875 | enum { | |
876 | ARG_VERSION = 0x100, | |
877 | ARG_KEY, | |
878 | ARG_CERT, | |
e5ebe12b | 879 | ARG_TRUST, |
858634ff ZJS |
880 | }; |
881 | ||
882 | int r, c; | |
883 | ||
884 | static const struct option options[] = { | |
1aa1e59c YE |
885 | { "help", no_argument, NULL, 'h' }, |
886 | { "version", no_argument, NULL, ARG_VERSION }, | |
887 | { "key", required_argument, NULL, ARG_KEY }, | |
888 | { "cert", required_argument, NULL, ARG_CERT }, | |
889 | { "trust", required_argument, NULL, ARG_TRUST }, | |
29b5b0c9 | 890 | { "directory", required_argument, NULL, 'D' }, |
eb9da376 | 891 | {} |
858634ff ZJS |
892 | }; |
893 | ||
894 | assert(argc >= 0); | |
895 | assert(argv); | |
896 | ||
554597a1 | 897 | while ((c = getopt_long(argc, argv, "hD:", options, NULL)) >= 0) |
eb9da376 | 898 | |
858634ff | 899 | switch(c) { |
eb9da376 LP |
900 | |
901 | case 'h': | |
601185b4 ZJS |
902 | help(); |
903 | return 0; | |
eb9da376 | 904 | |
858634ff | 905 | case ARG_VERSION: |
3f6fd1ba | 906 | return version(); |
858634ff ZJS |
907 | |
908 | case ARG_KEY: | |
2cf4172a | 909 | if (arg_key_pem) { |
858634ff ZJS |
910 | log_error("Key file specified twice"); |
911 | return -EINVAL; | |
912 | } | |
2cf4172a | 913 | r = read_full_file(optarg, &arg_key_pem, NULL); |
23bbb0de MS |
914 | if (r < 0) |
915 | return log_error_errno(r, "Failed to read key file: %m"); | |
2cf4172a | 916 | assert(arg_key_pem); |
858634ff | 917 | break; |
7b17a7d7 | 918 | |
858634ff | 919 | case ARG_CERT: |
2cf4172a | 920 | if (arg_cert_pem) { |
858634ff ZJS |
921 | log_error("Certificate file specified twice"); |
922 | return -EINVAL; | |
923 | } | |
2cf4172a | 924 | r = read_full_file(optarg, &arg_cert_pem, NULL); |
23bbb0de MS |
925 | if (r < 0) |
926 | return log_error_errno(r, "Failed to read certificate file: %m"); | |
2cf4172a | 927 | assert(arg_cert_pem); |
858634ff ZJS |
928 | break; |
929 | ||
e5ebe12b | 930 | case ARG_TRUST: |
349cc4a5 | 931 | #if HAVE_GNUTLS |
2cf4172a | 932 | if (arg_trust_pem) { |
e5ebe12b ZJS |
933 | log_error("CA certificate file specified twice"); |
934 | return -EINVAL; | |
935 | } | |
2cf4172a | 936 | r = read_full_file(optarg, &arg_trust_pem, NULL); |
23bbb0de MS |
937 | if (r < 0) |
938 | return log_error_errno(r, "Failed to read CA certificate file: %m"); | |
2cf4172a | 939 | assert(arg_trust_pem); |
e5ebe12b | 940 | break; |
f12be7e8 ZJS |
941 | #else |
942 | log_error("Option --trust is not available."); | |
3ab2feef | 943 | return -EINVAL; |
f12be7e8 | 944 | #endif |
1aa1e59c YE |
945 | case 'D': |
946 | arg_directory = optarg; | |
947 | break; | |
e5ebe12b | 948 | |
858634ff ZJS |
949 | case '?': |
950 | return -EINVAL; | |
951 | ||
952 | default: | |
eb9da376 | 953 | assert_not_reached("Unhandled option"); |
858634ff ZJS |
954 | } |
955 | ||
956 | if (optind < argc) { | |
7b17a7d7 | 957 | log_error("This program does not take arguments."); |
858634ff ZJS |
958 | return -EINVAL; |
959 | } | |
960 | ||
2cf4172a | 961 | if (!!arg_key_pem != !!arg_cert_pem) { |
858634ff ZJS |
962 | log_error("Certificate and key files must be specified together"); |
963 | return -EINVAL; | |
7b17a7d7 LP |
964 | } |
965 | ||
2cf4172a | 966 | if (arg_trust_pem && !arg_key_pem) { |
e5ebe12b ZJS |
967 | log_error("CA certificate can only be used with certificate file"); |
968 | return -EINVAL; | |
969 | } | |
970 | ||
858634ff ZJS |
971 | return 1; |
972 | } | |
973 | ||
974 | int main(int argc, char *argv[]) { | |
975 | struct MHD_Daemon *d = NULL; | |
976 | int r, n; | |
977 | ||
77ad3b93 | 978 | log_set_target(LOG_TARGET_AUTO); |
7b17a7d7 LP |
979 | log_parse_environment(); |
980 | log_open(); | |
981 | ||
858634ff ZJS |
982 | r = parse_argv(argc, argv); |
983 | if (r < 0) | |
984 | return EXIT_FAILURE; | |
985 | if (r == 0) | |
986 | return EXIT_SUCCESS; | |
987 | ||
2cf4172a LP |
988 | sigbus_install(); |
989 | ||
d357562c ZJS |
990 | r = setup_gnutls_logger(NULL); |
991 | if (r < 0) | |
992 | return EXIT_FAILURE; | |
cafc7f91 | 993 | |
7b17a7d7 LP |
994 | n = sd_listen_fds(1); |
995 | if (n < 0) { | |
da927ba9 | 996 | log_error_errno(n, "Failed to determine passed sockets: %m"); |
7b17a7d7 LP |
997 | goto finish; |
998 | } else if (n > 1) { | |
999 | log_error("Can't listen on more than one socket."); | |
1000 | goto finish; | |
7b17a7d7 | 1001 | } else { |
c54ff8e3 ZJS |
1002 | struct MHD_OptionItem opts[] = { |
1003 | { MHD_OPTION_NOTIFY_COMPLETED, | |
1004 | (intptr_t) request_meta_free, NULL }, | |
e64690a8 ZJS |
1005 | { MHD_OPTION_EXTERNAL_LOGGER, |
1006 | (intptr_t) microhttpd_logger, NULL }, | |
c54ff8e3 | 1007 | { MHD_OPTION_END, 0, NULL }, |
858634ff ZJS |
1008 | { MHD_OPTION_END, 0, NULL }, |
1009 | { MHD_OPTION_END, 0, NULL }, | |
e5ebe12b | 1010 | { MHD_OPTION_END, 0, NULL }, |
c54ff8e3 | 1011 | { MHD_OPTION_END, 0, NULL }}; |
e64690a8 | 1012 | int opts_pos = 2; |
ef08ced6 | 1013 | |
21b6ff36 ZJS |
1014 | /* We force MHD_USE_ITC here, in order to make sure |
1015 | * libmicrohttpd doesn't use shutdown() on our listening | |
1016 | * socket, which would break socket re-activation. See | |
ef08ced6 LP |
1017 | * |
1018 | * https://lists.gnu.org/archive/html/libmicrohttpd/2015-09/msg00014.html | |
1019 | * https://github.com/systemd/systemd/pull/1286 | |
1020 | */ | |
1021 | ||
1022 | int flags = | |
1023 | MHD_USE_DEBUG | | |
1024 | MHD_USE_DUAL_STACK | | |
21b6ff36 | 1025 | MHD_USE_ITC | |
315629a8 | 1026 | MHD_USE_POLL_INTERNAL_THREAD | |
ef08ced6 | 1027 | MHD_USE_THREAD_PER_CONNECTION; |
858634ff | 1028 | |
c54ff8e3 | 1029 | if (n > 0) |
858634ff ZJS |
1030 | opts[opts_pos++] = (struct MHD_OptionItem) |
1031 | {MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START}; | |
2cf4172a LP |
1032 | if (arg_key_pem) { |
1033 | assert(arg_cert_pem); | |
858634ff | 1034 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1035 | {MHD_OPTION_HTTPS_MEM_KEY, 0, arg_key_pem}; |
858634ff | 1036 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1037 | {MHD_OPTION_HTTPS_MEM_CERT, 0, arg_cert_pem}; |
c831aa75 | 1038 | flags |= MHD_USE_TLS; |
858634ff | 1039 | } |
2cf4172a | 1040 | if (arg_trust_pem) { |
c831aa75 | 1041 | assert(flags & MHD_USE_TLS); |
e5ebe12b | 1042 | opts[opts_pos++] = (struct MHD_OptionItem) |
2cf4172a | 1043 | {MHD_OPTION_HTTPS_MEM_TRUST, 0, arg_trust_pem}; |
e5ebe12b | 1044 | } |
858634ff ZJS |
1045 | |
1046 | d = MHD_start_daemon(flags, 19531, | |
1047 | NULL, NULL, | |
1048 | request_handler, NULL, | |
1049 | MHD_OPTION_ARRAY, opts, | |
1050 | MHD_OPTION_END); | |
7b17a7d7 LP |
1051 | } |
1052 | ||
6374a73b | 1053 | if (!d) { |
7b17a7d7 LP |
1054 | log_error("Failed to start daemon!"); |
1055 | goto finish; | |
1056 | } | |
1057 | ||
1058 | pause(); | |
1059 | ||
1060 | r = EXIT_SUCCESS; | |
1061 | ||
1062 | finish: | |
6374a73b ZJS |
1063 | if (d) |
1064 | MHD_stop_daemon(d); | |
7b17a7d7 LP |
1065 | |
1066 | return r; | |
1067 | } |