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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> | |
ca78ad1d ZJS |
8 | #include <sys/stat.h> |
9 | #include <sys/types.h> | |
3ffd4af2 | 10 | #include <unistd.h> |
f12be7e8 | 11 | |
a7edaadd | 12 | #include "sd-bus.h" |
3ffd4af2 LP |
13 | #include "sd-daemon.h" |
14 | #include "sd-journal.h" | |
3f6fd1ba | 15 | |
b5efdb8a | 16 | #include "alloc-util.h" |
40ca29a1 | 17 | #include "bus-util.h" |
4bbccb02 | 18 | #include "errno-util.h" |
3ffd4af2 | 19 | #include "fd-util.h" |
3f6fd1ba LP |
20 | #include "fileio.h" |
21 | #include "hostname-util.h" | |
22 | #include "log.h" | |
7b17a7d7 | 23 | #include "logs-show.h" |
29cd4c8f | 24 | #include "main-func.h" |
e64690a8 | 25 | #include "microhttpd-util.h" |
d58ad743 | 26 | #include "os-util.h" |
6bedfcbb | 27 | #include "parse-util.h" |
294bf0c3 | 28 | #include "pretty-print.h" |
2cf4172a | 29 | #include "sigbus.h" |
e4de7287 | 30 | #include "tmpfile-util.h" |
3f6fd1ba | 31 | #include "util.h" |
7b17a7d7 | 32 | |
11bb5147 DD |
33 | #define JOURNAL_WAIT_TIMEOUT (10*USEC_PER_SEC) |
34 | ||
2cf4172a LP |
35 | static char *arg_key_pem = NULL; |
36 | static char *arg_cert_pem = NULL; | |
37 | static char *arg_trust_pem = NULL; | |
29cd4c8f YW |
38 | static const char *arg_directory = NULL; |
39 | ||
40 | STATIC_DESTRUCTOR_REGISTER(arg_key_pem, freep); | |
41 | STATIC_DESTRUCTOR_REGISTER(arg_cert_pem, freep); | |
42 | STATIC_DESTRUCTOR_REGISTER(arg_trust_pem, freep); | |
f12be7e8 | 43 | |
7b17a7d7 LP |
44 | typedef struct RequestMeta { |
45 | sd_journal *journal; | |
46 | ||
47 | OutputMode mode; | |
48 | ||
49 | char *cursor; | |
50 | int64_t n_skip; | |
51 | uint64_t n_entries; | |
52 | bool n_entries_set; | |
53 | ||
54 | FILE *tmp; | |
55 | uint64_t delta, size; | |
98206c93 LP |
56 | |
57 | int argument_parse_error; | |
7a69007a LP |
58 | |
59 | bool follow; | |
c6511e85 | 60 | bool discrete; |
240a5fe8 LP |
61 | |
62 | uint64_t n_fields; | |
63 | bool n_fields_set; | |
7b17a7d7 LP |
64 | } RequestMeta; |
65 | ||
66 | static const char* const mime_types[_OUTPUT_MODE_MAX] = { | |
67 | [OUTPUT_SHORT] = "text/plain", | |
68 | [OUTPUT_JSON] = "application/json", | |
48383c25 | 69 | [OUTPUT_JSON_SSE] = "text/event-stream", |
8e044443 | 70 | [OUTPUT_JSON_SEQ] = "application/json-seq", |
48383c25 | 71 | [OUTPUT_EXPORT] = "application/vnd.fdo.journal", |
7b17a7d7 LP |
72 | }; |
73 | ||
74 | static RequestMeta *request_meta(void **connection_cls) { | |
75 | RequestMeta *m; | |
76 | ||
fdfccdbc | 77 | assert(connection_cls); |
7b17a7d7 LP |
78 | if (*connection_cls) |
79 | return *connection_cls; | |
80 | ||
81 | m = new0(RequestMeta, 1); | |
82 | if (!m) | |
83 | return NULL; | |
84 | ||
85 | *connection_cls = m; | |
86 | return m; | |
87 | } | |
88 | ||
89 | static void request_meta_free( | |
90 | void *cls, | |
91 | struct MHD_Connection *connection, | |
92 | void **connection_cls, | |
93 | enum MHD_RequestTerminationCode toe) { | |
94 | ||
95 | RequestMeta *m = *connection_cls; | |
96 | ||
97 | if (!m) | |
98 | return; | |
99 | ||
3e044c49 | 100 | sd_journal_close(m->journal); |
7b17a7d7 | 101 | |
74ca738f | 102 | safe_fclose(m->tmp); |
7b17a7d7 LP |
103 | |
104 | free(m->cursor); | |
105 | free(m); | |
106 | } | |
107 | ||
108 | static int open_journal(RequestMeta *m) { | |
109 | assert(m); | |
110 | ||
111 | if (m->journal) | |
112 | return 0; | |
113 | ||
1aa1e59c YE |
114 | if (arg_directory) |
115 | return sd_journal_open_directory(&m->journal, arg_directory, 0); | |
116 | else | |
117 | return sd_journal_open(&m->journal, SD_JOURNAL_LOCAL_ONLY|SD_JOURNAL_SYSTEM); | |
7b17a7d7 LP |
118 | } |
119 | ||
cc02a7b3 | 120 | static int request_meta_ensure_tmp(RequestMeta *m) { |
03532f0a LP |
121 | assert(m); |
122 | ||
cc02a7b3 ZJS |
123 | if (m->tmp) |
124 | rewind(m->tmp); | |
125 | else { | |
b46c3e49 | 126 | _cleanup_close_ int fd = -1; |
cc02a7b3 | 127 | |
03532f0a | 128 | fd = open_tmpfile_unlinkable("/tmp", O_RDWR|O_CLOEXEC); |
cc02a7b3 ZJS |
129 | if (fd < 0) |
130 | return fd; | |
131 | ||
b46c3e49 VC |
132 | m->tmp = take_fdopen(&fd, "w+"); |
133 | if (!m->tmp) | |
cc02a7b3 | 134 | return -errno; |
cc02a7b3 ZJS |
135 | } |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
7b17a7d7 LP |
140 | static ssize_t request_reader_entries( |
141 | void *cls, | |
142 | uint64_t pos, | |
143 | char *buf, | |
144 | size_t max) { | |
145 | ||
146 | RequestMeta *m = cls; | |
147 | int r; | |
148 | size_t n, k; | |
149 | ||
150 | assert(m); | |
151 | assert(buf); | |
152 | assert(max > 0); | |
153 | assert(pos >= m->delta); | |
154 | ||
155 | pos -= m->delta; | |
156 | ||
157 | while (pos >= m->size) { | |
158 | off_t sz; | |
159 | ||
160 | /* End of this entry, so let's serialize the next | |
161 | * one */ | |
162 | ||
163 | if (m->n_entries_set && | |
164 | m->n_entries <= 0) | |
165 | return MHD_CONTENT_READER_END_OF_STREAM; | |
166 | ||
77ad3b93 LP |
167 | if (m->n_skip < 0) |
168 | r = sd_journal_previous_skip(m->journal, (uint64_t) -m->n_skip + 1); | |
169 | else if (m->n_skip > 0) | |
7b17a7d7 LP |
170 | r = sd_journal_next_skip(m->journal, (uint64_t) m->n_skip + 1); |
171 | else | |
172 | r = sd_journal_next(m->journal); | |
173 | ||
174 | if (r < 0) { | |
da927ba9 | 175 | log_error_errno(r, "Failed to advance journal pointer: %m"); |
7b17a7d7 | 176 | return MHD_CONTENT_READER_END_WITH_ERROR; |
7a69007a LP |
177 | } else if (r == 0) { |
178 | ||
179 | if (m->follow) { | |
11bb5147 | 180 | r = sd_journal_wait(m->journal, (uint64_t) JOURNAL_WAIT_TIMEOUT); |
7a69007a | 181 | if (r < 0) { |
da927ba9 | 182 | log_error_errno(r, "Couldn't wait for journal event: %m"); |
7a69007a LP |
183 | return MHD_CONTENT_READER_END_WITH_ERROR; |
184 | } | |
11bb5147 DD |
185 | if (r == SD_JOURNAL_NOP) |
186 | break; | |
7a69007a LP |
187 | |
188 | continue; | |
189 | } | |
190 | ||
7b17a7d7 | 191 | return MHD_CONTENT_READER_END_OF_STREAM; |
7a69007a | 192 | } |
7b17a7d7 | 193 | |
c6511e85 LP |
194 | if (m->discrete) { |
195 | assert(m->cursor); | |
196 | ||
197 | r = sd_journal_test_cursor(m->journal, m->cursor); | |
198 | if (r < 0) { | |
da927ba9 | 199 | log_error_errno(r, "Failed to test cursor: %m"); |
c6511e85 LP |
200 | return MHD_CONTENT_READER_END_WITH_ERROR; |
201 | } | |
202 | ||
203 | if (r == 0) | |
204 | return MHD_CONTENT_READER_END_OF_STREAM; | |
205 | } | |
206 | ||
7b17a7d7 LP |
207 | pos -= m->size; |
208 | m->delta += m->size; | |
209 | ||
210 | if (m->n_entries_set) | |
211 | m->n_entries -= 1; | |
212 | ||
213 | m->n_skip = 0; | |
214 | ||
cc02a7b3 ZJS |
215 | r = request_meta_ensure_tmp(m); |
216 | if (r < 0) { | |
217 | log_error_errno(r, "Failed to create temporary file: %m"); | |
218 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
7b17a7d7 LP |
219 | } |
220 | ||
9b972c9a | 221 | r = show_journal_entry(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, |
b4766d5f | 222 | NULL, NULL, NULL); |
7b17a7d7 | 223 | if (r < 0) { |
da927ba9 | 224 | log_error_errno(r, "Failed to serialize item: %m"); |
7b17a7d7 LP |
225 | return MHD_CONTENT_READER_END_WITH_ERROR; |
226 | } | |
227 | ||
228 | sz = ftello(m->tmp); | |
229 | if (sz == (off_t) -1) { | |
56f64d95 | 230 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
7b17a7d7 LP |
231 | return MHD_CONTENT_READER_END_WITH_ERROR; |
232 | } | |
233 | ||
234 | m->size = (uint64_t) sz; | |
235 | } | |
236 | ||
3475fc58 YE |
237 | if (m->tmp == NULL && m->follow) |
238 | return 0; | |
239 | ||
7b17a7d7 | 240 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { |
56f64d95 | 241 | log_error_errno(errno, "Failed to seek to position: %m"); |
7b17a7d7 LP |
242 | return MHD_CONTENT_READER_END_WITH_ERROR; |
243 | } | |
244 | ||
245 | n = m->size - pos; | |
11bb5147 DD |
246 | if (n < 1) |
247 | return 0; | |
7b17a7d7 LP |
248 | if (n > max) |
249 | n = max; | |
250 | ||
251 | errno = 0; | |
252 | k = fread(buf, 1, n, m->tmp); | |
253 | if (k != n) { | |
4bbccb02 | 254 | log_error("Failed to read from file: %s", errno != 0 ? strerror_safe(errno) : "Premature EOF"); |
7b17a7d7 LP |
255 | return MHD_CONTENT_READER_END_WITH_ERROR; |
256 | } | |
257 | ||
258 | return (ssize_t) k; | |
259 | } | |
260 | ||
261 | static int request_parse_accept( | |
262 | RequestMeta *m, | |
263 | struct MHD_Connection *connection) { | |
264 | ||
6374a73b | 265 | const char *header; |
7b17a7d7 LP |
266 | |
267 | assert(m); | |
268 | assert(connection); | |
269 | ||
6374a73b ZJS |
270 | header = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Accept"); |
271 | if (!header) | |
7b17a7d7 LP |
272 | return 0; |
273 | ||
6374a73b | 274 | if (streq(header, mime_types[OUTPUT_JSON])) |
7b17a7d7 | 275 | m->mode = OUTPUT_JSON; |
6374a73b | 276 | else if (streq(header, mime_types[OUTPUT_JSON_SSE])) |
48383c25 | 277 | m->mode = OUTPUT_JSON_SSE; |
8e044443 LP |
278 | else if (streq(header, mime_types[OUTPUT_JSON_SEQ])) |
279 | m->mode = OUTPUT_JSON_SEQ; | |
6374a73b | 280 | else if (streq(header, mime_types[OUTPUT_EXPORT])) |
7b17a7d7 LP |
281 | m->mode = OUTPUT_EXPORT; |
282 | else | |
283 | m->mode = OUTPUT_SHORT; | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int request_parse_range( | |
289 | RequestMeta *m, | |
290 | struct MHD_Connection *connection) { | |
291 | ||
292 | const char *range, *colon, *colon2; | |
293 | int r; | |
294 | ||
295 | assert(m); | |
296 | assert(connection); | |
297 | ||
298 | range = MHD_lookup_connection_value(connection, MHD_HEADER_KIND, "Range"); | |
299 | if (!range) | |
300 | return 0; | |
301 | ||
302 | if (!startswith(range, "entries=")) | |
303 | return 0; | |
304 | ||
305 | range += 8; | |
306 | range += strspn(range, WHITESPACE); | |
307 | ||
308 | colon = strchr(range, ':'); | |
309 | if (!colon) | |
310 | m->cursor = strdup(range); | |
311 | else { | |
312 | const char *p; | |
313 | ||
314 | colon2 = strchr(colon + 1, ':'); | |
315 | if (colon2) { | |
7fd1b19b | 316 | _cleanup_free_ char *t; |
7b17a7d7 LP |
317 | |
318 | t = strndup(colon + 1, colon2 - colon - 1); | |
319 | if (!t) | |
320 | return -ENOMEM; | |
321 | ||
322 | r = safe_atoi64(t, &m->n_skip); | |
7b17a7d7 LP |
323 | if (r < 0) |
324 | return r; | |
325 | } | |
326 | ||
327 | p = (colon2 ? colon2 : colon) + 1; | |
328 | if (*p) { | |
329 | r = safe_atou64(p, &m->n_entries); | |
330 | if (r < 0) | |
331 | return r; | |
332 | ||
333 | if (m->n_entries <= 0) | |
334 | return -EINVAL; | |
335 | ||
336 | m->n_entries_set = true; | |
337 | } | |
338 | ||
339 | m->cursor = strndup(range, colon - range); | |
340 | } | |
341 | ||
342 | if (!m->cursor) | |
343 | return -ENOMEM; | |
344 | ||
345 | m->cursor[strcspn(m->cursor, WHITESPACE)] = 0; | |
ece174c5 | 346 | if (isempty(m->cursor)) |
a1e58e8e | 347 | m->cursor = mfree(m->cursor); |
7b17a7d7 LP |
348 | |
349 | return 0; | |
350 | } | |
351 | ||
d17eabb1 | 352 | static mhd_result request_parse_arguments_iterator( |
98206c93 LP |
353 | void *cls, |
354 | enum MHD_ValueKind kind, | |
355 | const char *key, | |
356 | const char *value) { | |
357 | ||
358 | RequestMeta *m = cls; | |
359 | _cleanup_free_ char *p = NULL; | |
360 | int r; | |
361 | ||
362 | assert(m); | |
363 | ||
364 | if (isempty(key)) { | |
365 | m->argument_parse_error = -EINVAL; | |
366 | return MHD_NO; | |
367 | } | |
368 | ||
7a69007a LP |
369 | if (streq(key, "follow")) { |
370 | if (isempty(value)) { | |
371 | m->follow = true; | |
372 | return MHD_YES; | |
373 | } | |
374 | ||
375 | r = parse_boolean(value); | |
376 | if (r < 0) { | |
377 | m->argument_parse_error = r; | |
378 | return MHD_NO; | |
379 | } | |
380 | ||
381 | m->follow = r; | |
382 | return MHD_YES; | |
383 | } | |
384 | ||
c6511e85 LP |
385 | if (streq(key, "discrete")) { |
386 | if (isempty(value)) { | |
387 | m->discrete = true; | |
388 | return MHD_YES; | |
389 | } | |
390 | ||
391 | r = parse_boolean(value); | |
392 | if (r < 0) { | |
393 | m->argument_parse_error = r; | |
394 | return MHD_NO; | |
395 | } | |
396 | ||
397 | m->discrete = r; | |
398 | return MHD_YES; | |
399 | } | |
400 | ||
082d0180 LP |
401 | if (streq(key, "boot")) { |
402 | if (isempty(value)) | |
403 | r = true; | |
404 | else { | |
405 | r = parse_boolean(value); | |
406 | if (r < 0) { | |
407 | m->argument_parse_error = r; | |
408 | return MHD_NO; | |
409 | } | |
410 | } | |
411 | ||
412 | if (r) { | |
413 | char match[9 + 32 + 1] = "_BOOT_ID="; | |
414 | sd_id128_t bid; | |
415 | ||
416 | r = sd_id128_get_boot(&bid); | |
417 | if (r < 0) { | |
da927ba9 | 418 | log_error_errno(r, "Failed to get boot ID: %m"); |
082d0180 LP |
419 | return MHD_NO; |
420 | } | |
421 | ||
422 | sd_id128_to_string(bid, match + 9); | |
423 | r = sd_journal_add_match(m->journal, match, sizeof(match)-1); | |
424 | if (r < 0) { | |
425 | m->argument_parse_error = r; | |
426 | return MHD_NO; | |
427 | } | |
428 | } | |
429 | ||
430 | return MHD_YES; | |
431 | } | |
432 | ||
605405c6 | 433 | p = strjoin(key, "=", strempty(value)); |
98206c93 LP |
434 | if (!p) { |
435 | m->argument_parse_error = log_oom(); | |
436 | return MHD_NO; | |
437 | } | |
438 | ||
439 | r = sd_journal_add_match(m->journal, p, 0); | |
440 | if (r < 0) { | |
441 | m->argument_parse_error = r; | |
442 | return MHD_NO; | |
443 | } | |
444 | ||
445 | return MHD_YES; | |
446 | } | |
447 | ||
448 | static int request_parse_arguments( | |
449 | RequestMeta *m, | |
450 | struct MHD_Connection *connection) { | |
451 | ||
452 | assert(m); | |
453 | assert(connection); | |
454 | ||
455 | m->argument_parse_error = 0; | |
456 | MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, request_parse_arguments_iterator, m); | |
457 | ||
458 | return m->argument_parse_error; | |
459 | } | |
460 | ||
7b17a7d7 LP |
461 | static int request_handler_entries( |
462 | struct MHD_Connection *connection, | |
8530a143 | 463 | void *connection_cls) { |
7b17a7d7 | 464 | |
d101fb24 | 465 | _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL; |
8530a143 | 466 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
467 | int r; |
468 | ||
469 | assert(connection); | |
8530a143 | 470 | assert(m); |
7b17a7d7 LP |
471 | |
472 | r = open_journal(m); | |
473 | if (r < 0) | |
f5e757f1 | 474 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
7b17a7d7 LP |
475 | |
476 | if (request_parse_accept(m, connection) < 0) | |
f5e757f1 | 477 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header."); |
7b17a7d7 LP |
478 | |
479 | if (request_parse_range(m, connection) < 0) | |
f5e757f1 | 480 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Range header."); |
7b17a7d7 | 481 | |
98206c93 | 482 | if (request_parse_arguments(m, connection) < 0) |
f5e757f1 | 483 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse URL arguments."); |
98206c93 | 484 | |
c6511e85 LP |
485 | if (m->discrete) { |
486 | if (!m->cursor) | |
f5e757f1 | 487 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Discrete seeks require a cursor specification."); |
c6511e85 LP |
488 | |
489 | m->n_entries = 1; | |
490 | m->n_entries_set = true; | |
491 | } | |
492 | ||
7b17a7d7 LP |
493 | if (m->cursor) |
494 | r = sd_journal_seek_cursor(m->journal, m->cursor); | |
495 | else if (m->n_skip >= 0) | |
496 | r = sd_journal_seek_head(m->journal); | |
497 | else if (m->n_skip < 0) | |
498 | r = sd_journal_seek_tail(m->journal); | |
499 | if (r < 0) | |
f5e757f1 | 500 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to seek in journal."); |
7b17a7d7 LP |
501 | |
502 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_entries, m, NULL); | |
503 | if (!response) | |
504 | return respond_oom(connection); | |
505 | ||
506 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode]); | |
d101fb24 | 507 | return MHD_queue_response(connection, MHD_HTTP_OK, response); |
7b17a7d7 LP |
508 | } |
509 | ||
240a5fe8 LP |
510 | static int output_field(FILE *f, OutputMode m, const char *d, size_t l) { |
511 | const char *eq; | |
512 | size_t j; | |
513 | ||
514 | eq = memchr(d, '=', l); | |
515 | if (!eq) | |
516 | return -EINVAL; | |
517 | ||
518 | j = l - (eq - d + 1); | |
519 | ||
520 | if (m == OUTPUT_JSON) { | |
521 | fprintf(f, "{ \"%.*s\" : ", (int) (eq - d), d); | |
522 | json_escape(f, eq+1, j, OUTPUT_FULL_WIDTH); | |
523 | fputs(" }\n", f); | |
524 | } else { | |
525 | fwrite(eq+1, 1, j, f); | |
526 | fputc('\n', f); | |
527 | } | |
528 | ||
529 | return 0; | |
530 | } | |
531 | ||
532 | static ssize_t request_reader_fields( | |
533 | void *cls, | |
534 | uint64_t pos, | |
535 | char *buf, | |
536 | size_t max) { | |
537 | ||
538 | RequestMeta *m = cls; | |
539 | int r; | |
540 | size_t n, k; | |
541 | ||
542 | assert(m); | |
543 | assert(buf); | |
544 | assert(max > 0); | |
545 | assert(pos >= m->delta); | |
546 | ||
547 | pos -= m->delta; | |
548 | ||
549 | while (pos >= m->size) { | |
550 | off_t sz; | |
551 | const void *d; | |
552 | size_t l; | |
553 | ||
554 | /* End of this field, so let's serialize the next | |
555 | * one */ | |
556 | ||
557 | if (m->n_fields_set && | |
558 | m->n_fields <= 0) | |
559 | return MHD_CONTENT_READER_END_OF_STREAM; | |
560 | ||
561 | r = sd_journal_enumerate_unique(m->journal, &d, &l); | |
562 | if (r < 0) { | |
da927ba9 | 563 | log_error_errno(r, "Failed to advance field index: %m"); |
240a5fe8 LP |
564 | return MHD_CONTENT_READER_END_WITH_ERROR; |
565 | } else if (r == 0) | |
566 | return MHD_CONTENT_READER_END_OF_STREAM; | |
567 | ||
568 | pos -= m->size; | |
569 | m->delta += m->size; | |
570 | ||
571 | if (m->n_fields_set) | |
572 | m->n_fields -= 1; | |
573 | ||
cc02a7b3 ZJS |
574 | r = request_meta_ensure_tmp(m); |
575 | if (r < 0) { | |
576 | log_error_errno(r, "Failed to create temporary file: %m"); | |
577 | return MHD_CONTENT_READER_END_WITH_ERROR; | |
240a5fe8 LP |
578 | } |
579 | ||
580 | r = output_field(m->tmp, m->mode, d, l); | |
581 | if (r < 0) { | |
da927ba9 | 582 | log_error_errno(r, "Failed to serialize item: %m"); |
240a5fe8 LP |
583 | return MHD_CONTENT_READER_END_WITH_ERROR; |
584 | } | |
585 | ||
586 | sz = ftello(m->tmp); | |
587 | if (sz == (off_t) -1) { | |
56f64d95 | 588 | log_error_errno(errno, "Failed to retrieve file position: %m"); |
240a5fe8 LP |
589 | return MHD_CONTENT_READER_END_WITH_ERROR; |
590 | } | |
591 | ||
592 | m->size = (uint64_t) sz; | |
593 | } | |
594 | ||
595 | if (fseeko(m->tmp, pos, SEEK_SET) < 0) { | |
56f64d95 | 596 | log_error_errno(errno, "Failed to seek to position: %m"); |
240a5fe8 LP |
597 | return MHD_CONTENT_READER_END_WITH_ERROR; |
598 | } | |
599 | ||
600 | n = m->size - pos; | |
601 | if (n > max) | |
602 | n = max; | |
603 | ||
604 | errno = 0; | |
605 | k = fread(buf, 1, n, m->tmp); | |
606 | if (k != n) { | |
4bbccb02 | 607 | log_error("Failed to read from file: %s", errno != 0 ? strerror_safe(errno) : "Premature EOF"); |
240a5fe8 LP |
608 | return MHD_CONTENT_READER_END_WITH_ERROR; |
609 | } | |
610 | ||
611 | return (ssize_t) k; | |
612 | } | |
613 | ||
614 | static int request_handler_fields( | |
615 | struct MHD_Connection *connection, | |
616 | const char *field, | |
617 | void *connection_cls) { | |
618 | ||
d101fb24 | 619 | _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL; |
8530a143 | 620 | RequestMeta *m = connection_cls; |
240a5fe8 LP |
621 | int r; |
622 | ||
623 | assert(connection); | |
8530a143 | 624 | assert(m); |
240a5fe8 LP |
625 | |
626 | r = open_journal(m); | |
627 | if (r < 0) | |
f5e757f1 | 628 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
240a5fe8 LP |
629 | |
630 | if (request_parse_accept(m, connection) < 0) | |
f5e757f1 | 631 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to parse Accept header."); |
240a5fe8 LP |
632 | |
633 | r = sd_journal_query_unique(m->journal, field); | |
634 | if (r < 0) | |
f5e757f1 | 635 | return mhd_respond(connection, MHD_HTTP_BAD_REQUEST, "Failed to query unique fields."); |
240a5fe8 LP |
636 | |
637 | response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 4*1024, request_reader_fields, m, NULL); | |
638 | if (!response) | |
639 | return respond_oom(connection); | |
640 | ||
641 | MHD_add_response_header(response, "Content-Type", mime_types[m->mode == OUTPUT_JSON ? OUTPUT_JSON : OUTPUT_SHORT]); | |
d101fb24 | 642 | return MHD_queue_response(connection, MHD_HTTP_OK, response); |
240a5fe8 LP |
643 | } |
644 | ||
7b17a7d7 LP |
645 | static int request_handler_redirect( |
646 | struct MHD_Connection *connection, | |
647 | const char *target) { | |
648 | ||
649 | char *page; | |
d101fb24 | 650 | _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL; |
7b17a7d7 LP |
651 | |
652 | assert(connection); | |
fadd79d2 | 653 | assert(target); |
7b17a7d7 LP |
654 | |
655 | if (asprintf(&page, "<html><body>Please continue to the <a href=\"%s\">journal browser</a>.</body></html>", target) < 0) | |
656 | return respond_oom(connection); | |
657 | ||
658 | response = MHD_create_response_from_buffer(strlen(page), page, MHD_RESPMEM_MUST_FREE); | |
659 | if (!response) { | |
660 | free(page); | |
661 | return respond_oom(connection); | |
662 | } | |
663 | ||
664 | MHD_add_response_header(response, "Content-Type", "text/html"); | |
665 | MHD_add_response_header(response, "Location", target); | |
d101fb24 | 666 | return MHD_queue_response(connection, MHD_HTTP_MOVED_PERMANENTLY, response); |
7b17a7d7 LP |
667 | } |
668 | ||
669 | static int request_handler_file( | |
670 | struct MHD_Connection *connection, | |
671 | const char *path, | |
672 | const char *mime_type) { | |
673 | ||
d101fb24 | 674 | _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL; |
7b17a7d7 LP |
675 | _cleanup_close_ int fd = -1; |
676 | struct stat st; | |
677 | ||
678 | assert(connection); | |
679 | assert(path); | |
680 | assert(mime_type); | |
681 | ||
682 | fd = open(path, O_RDONLY|O_CLOEXEC); | |
683 | if (fd < 0) | |
f5e757f1 | 684 | return mhd_respondf(connection, errno, MHD_HTTP_NOT_FOUND, "Failed to open file %s: %m", path); |
7b17a7d7 LP |
685 | |
686 | if (fstat(fd, &st) < 0) | |
f5e757f1 | 687 | return mhd_respondf(connection, errno, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to stat file: %m"); |
7b17a7d7 | 688 | |
da0a9a33 | 689 | response = MHD_create_response_from_fd_at_offset64(st.st_size, fd, 0); |
7b17a7d7 LP |
690 | if (!response) |
691 | return respond_oom(connection); | |
d101fb24 | 692 | TAKE_FD(fd); |
7b17a7d7 LP |
693 | |
694 | MHD_add_response_header(response, "Content-Type", mime_type); | |
d101fb24 | 695 | return MHD_queue_response(connection, MHD_HTTP_OK, response); |
7b17a7d7 LP |
696 | } |
697 | ||
a7edaadd | 698 | static int get_virtualization(char **v) { |
4afd3348 | 699 | _cleanup_(sd_bus_unrefp) sd_bus *bus = NULL; |
39883f62 | 700 | char *b = NULL; |
a7edaadd LP |
701 | int r; |
702 | ||
76b54375 | 703 | r = sd_bus_default_system(&bus); |
a7edaadd LP |
704 | if (r < 0) |
705 | return r; | |
706 | ||
47c649b5 | 707 | r = sd_bus_get_property_string( |
a7edaadd LP |
708 | bus, |
709 | "org.freedesktop.systemd1", | |
710 | "/org/freedesktop/systemd1", | |
917b5dc7 | 711 | "org.freedesktop.systemd1.Manager", |
47c649b5 LP |
712 | "Virtualization", |
713 | NULL, | |
714 | &b); | |
a7edaadd LP |
715 | if (r < 0) |
716 | return r; | |
717 | ||
47c649b5 LP |
718 | if (isempty(b)) { |
719 | free(b); | |
a7edaadd LP |
720 | *v = NULL; |
721 | return 0; | |
722 | } | |
723 | ||
a7edaadd LP |
724 | *v = b; |
725 | return 1; | |
726 | } | |
727 | ||
7b17a7d7 LP |
728 | static int request_handler_machine( |
729 | struct MHD_Connection *connection, | |
8530a143 | 730 | void *connection_cls) { |
7b17a7d7 | 731 | |
d101fb24 | 732 | _cleanup_(MHD_destroy_responsep) struct MHD_Response *response = NULL; |
8530a143 | 733 | RequestMeta *m = connection_cls; |
7b17a7d7 LP |
734 | int r; |
735 | _cleanup_free_ char* hostname = NULL, *os_name = NULL; | |
a7f7d1bd | 736 | uint64_t cutoff_from = 0, cutoff_to = 0, usage = 0; |
7b17a7d7 | 737 | sd_id128_t mid, bid; |
d101fb24 | 738 | _cleanup_free_ char *v = NULL, *json = NULL; |
7b17a7d7 LP |
739 | |
740 | assert(connection); | |
8530a143 | 741 | assert(m); |
7b17a7d7 LP |
742 | |
743 | r = open_journal(m); | |
744 | if (r < 0) | |
f5e757f1 | 745 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to open journal: %m"); |
7b17a7d7 LP |
746 | |
747 | r = sd_id128_get_machine(&mid); | |
748 | if (r < 0) | |
f5e757f1 | 749 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine machine ID: %m"); |
7b17a7d7 LP |
750 | |
751 | r = sd_id128_get_boot(&bid); | |
752 | if (r < 0) | |
f5e757f1 | 753 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine boot ID: %m"); |
7b17a7d7 LP |
754 | |
755 | hostname = gethostname_malloc(); | |
756 | if (!hostname) | |
757 | return respond_oom(connection); | |
758 | ||
759 | r = sd_journal_get_usage(m->journal, &usage); | |
760 | if (r < 0) | |
e4662e55 | 761 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %m"); |
7b17a7d7 LP |
762 | |
763 | r = sd_journal_get_cutoff_realtime_usec(m->journal, &cutoff_from, &cutoff_to); | |
764 | if (r < 0) | |
e4662e55 | 765 | return mhd_respondf(connection, r, MHD_HTTP_INTERNAL_SERVER_ERROR, "Failed to determine disk usage: %m"); |
7b17a7d7 | 766 | |
d58ad743 LP |
767 | (void) parse_os_release(NULL, "PRETTY_NAME", &os_name, NULL); |
768 | (void) get_virtualization(&v); | |
7b17a7d7 LP |
769 | |
770 | r = asprintf(&json, | |
771 | "{ \"machine_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
772 | "\"boot_id\" : \"" SD_ID128_FORMAT_STR "\"," | |
773 | "\"hostname\" : \"%s\"," | |
774 | "\"os_pretty_name\" : \"%s\"," | |
775 | "\"virtualization\" : \"%s\"," | |
507f22bd ZJS |
776 | "\"usage\" : \"%"PRIu64"\"," |
777 | "\"cutoff_from_realtime\" : \"%"PRIu64"\"," | |
778 | "\"cutoff_to_realtime\" : \"%"PRIu64"\" }\n", | |
7b17a7d7 LP |
779 | SD_ID128_FORMAT_VAL(mid), |
780 | SD_ID128_FORMAT_VAL(bid), | |
ae691c1d | 781 | hostname_cleanup(hostname), |
7b17a7d7 | 782 | os_name ? os_name : "Linux", |
a7edaadd | 783 | v ? v : "bare", |
507f22bd ZJS |
784 | usage, |
785 | cutoff_from, | |
786 | cutoff_to); | |
7b17a7d7 LP |
787 | if (r < 0) |
788 | return respond_oom(connection); | |
789 | ||
790 | response = MHD_create_response_from_buffer(strlen(json), json, MHD_RESPMEM_MUST_FREE); | |
d101fb24 | 791 | if (!response) |
7b17a7d7 | 792 | return respond_oom(connection); |
d101fb24 | 793 | TAKE_PTR(json); |
7b17a7d7 LP |
794 | |
795 | MHD_add_response_header(response, "Content-Type", "application/json"); | |
d101fb24 | 796 | return MHD_queue_response(connection, MHD_HTTP_OK, response); |
7b17a7d7 LP |
797 | } |
798 | ||
d17eabb1 | 799 | static mhd_result request_handler( |
7b17a7d7 LP |
800 | void *cls, |
801 | struct MHD_Connection *connection, | |
802 | const char *url, | |
803 | const char *method, | |
804 | const char *version, | |
805 | const char *upload_data, | |
806 | size_t *upload_data_size, | |
807 | void **connection_cls) { | |
f12be7e8 | 808 | int r, code; |
7b17a7d7 LP |
809 | |
810 | assert(connection); | |
8530a143 | 811 | assert(connection_cls); |
7b17a7d7 LP |
812 | assert(url); |
813 | assert(method); | |
814 | ||
815 | if (!streq(method, "GET")) | |
f5e757f1 | 816 | return mhd_respond(connection, MHD_HTTP_NOT_ACCEPTABLE, "Unsupported method."); |
a93035ce | 817 | |
8530a143 ZJS |
818 | if (!*connection_cls) { |
819 | if (!request_meta(connection_cls)) | |
820 | return respond_oom(connection); | |
821 | return MHD_YES; | |
822 | } | |
823 | ||
2cf4172a | 824 | if (arg_trust_pem) { |
8201af08 | 825 | r = check_permissions(connection, &code, NULL); |
f12be7e8 ZJS |
826 | if (r < 0) |
827 | return code; | |
828 | } | |
829 | ||
7b17a7d7 LP |
830 | if (streq(url, "/")) |
831 | return request_handler_redirect(connection, "/browse"); | |
832 | ||
833 | if (streq(url, "/entries")) | |
8530a143 | 834 | return request_handler_entries(connection, *connection_cls); |
7b17a7d7 | 835 | |
240a5fe8 | 836 | if (startswith(url, "/fields/")) |
8530a143 | 837 | return request_handler_fields(connection, url + 8, *connection_cls); |
240a5fe8 | 838 | |
7b17a7d7 LP |
839 | if (streq(url, "/browse")) |
840 | return request_handler_file(connection, DOCUMENT_ROOT "/browse.html", "text/html"); | |
841 | ||
842 | if (streq(url, "/machine")) | |
8530a143 | 843 | return request_handler_machine(connection, *connection_cls); |
7b17a7d7 | 844 | |
f5e757f1 | 845 | return mhd_respond(connection, MHD_HTTP_NOT_FOUND, "Not found."); |
7b17a7d7 LP |
846 | } |
847 | ||
37ec0fdd LP |
848 | static int help(void) { |
849 | _cleanup_free_ char *link = NULL; | |
850 | int r; | |
851 | ||
852 | r = terminal_urlify_man("systemd-journal-gatewayd.service", "8", &link); | |
853 | if (r < 0) | |
854 | return log_oom(); | |
855 | ||
c3a7cfb7 ZJS |
856 | printf("%s [OPTIONS...] ...\n\n" |
857 | "HTTP server for journal events.\n\n" | |
858 | " -h --help Show this help\n" | |
859 | " --version Show package version\n" | |
e5ebe12b ZJS |
860 | " --cert=CERT.PEM Server certificate in PEM format\n" |
861 | " --key=KEY.PEM Server key in PEM format\n" | |
5a507f8c | 862 | " --trust=CERT.PEM Certificate authority certificate in PEM format\n" |
37ec0fdd LP |
863 | " -D --directory=PATH Serve journal files in directory\n" |
864 | "\nSee the %s for details.\n" | |
865 | , program_invocation_short_name | |
866 | , link | |
867 | ); | |
868 | ||
869 | return 0; | |
c3a7cfb7 ZJS |
870 | } |
871 | ||
858634ff ZJS |
872 | static int parse_argv(int argc, char *argv[]) { |
873 | enum { | |
874 | ARG_VERSION = 0x100, | |
875 | ARG_KEY, | |
876 | ARG_CERT, | |
e5ebe12b | 877 | ARG_TRUST, |
858634ff ZJS |
878 | }; |
879 | ||
880 | int r, c; | |
881 | ||
882 | static const struct option options[] = { | |
1aa1e59c YE |
883 | { "help", no_argument, NULL, 'h' }, |
884 | { "version", no_argument, NULL, ARG_VERSION }, | |
885 | { "key", required_argument, NULL, ARG_KEY }, | |
886 | { "cert", required_argument, NULL, ARG_CERT }, | |
887 | { "trust", required_argument, NULL, ARG_TRUST }, | |
29b5b0c9 | 888 | { "directory", required_argument, NULL, 'D' }, |
eb9da376 | 889 | {} |
858634ff ZJS |
890 | }; |
891 | ||
892 | assert(argc >= 0); | |
893 | assert(argv); | |
894 | ||
554597a1 | 895 | while ((c = getopt_long(argc, argv, "hD:", options, NULL)) >= 0) |
eb9da376 | 896 | |
858634ff | 897 | switch(c) { |
eb9da376 LP |
898 | |
899 | case 'h': | |
37ec0fdd | 900 | return help(); |
eb9da376 | 901 | |
858634ff | 902 | case ARG_VERSION: |
3f6fd1ba | 903 | return version(); |
858634ff ZJS |
904 | |
905 | case ARG_KEY: | |
baaa35ad ZJS |
906 | if (arg_key_pem) |
907 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
908 | "Key file specified twice"); | |
2cf4172a | 909 | r = read_full_file(optarg, &arg_key_pem, NULL); |
23bbb0de MS |
910 | if (r < 0) |
911 | return log_error_errno(r, "Failed to read key file: %m"); | |
2cf4172a | 912 | assert(arg_key_pem); |
858634ff | 913 | break; |
7b17a7d7 | 914 | |
858634ff | 915 | case ARG_CERT: |
baaa35ad ZJS |
916 | if (arg_cert_pem) |
917 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
918 | "Certificate file specified twice"); | |
2cf4172a | 919 | r = read_full_file(optarg, &arg_cert_pem, NULL); |
23bbb0de MS |
920 | if (r < 0) |
921 | return log_error_errno(r, "Failed to read certificate file: %m"); | |
2cf4172a | 922 | assert(arg_cert_pem); |
858634ff ZJS |
923 | break; |
924 | ||
e5ebe12b | 925 | case ARG_TRUST: |
349cc4a5 | 926 | #if HAVE_GNUTLS |
baaa35ad ZJS |
927 | if (arg_trust_pem) |
928 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
929 | "CA certificate file specified twice"); | |
2cf4172a | 930 | r = read_full_file(optarg, &arg_trust_pem, NULL); |
23bbb0de MS |
931 | if (r < 0) |
932 | return log_error_errno(r, "Failed to read CA certificate file: %m"); | |
2cf4172a | 933 | assert(arg_trust_pem); |
e5ebe12b | 934 | break; |
f12be7e8 | 935 | #else |
baaa35ad ZJS |
936 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
937 | "Option --trust is not available."); | |
f12be7e8 | 938 | #endif |
1aa1e59c YE |
939 | case 'D': |
940 | arg_directory = optarg; | |
941 | break; | |
e5ebe12b | 942 | |
858634ff ZJS |
943 | case '?': |
944 | return -EINVAL; | |
945 | ||
946 | default: | |
eb9da376 | 947 | assert_not_reached("Unhandled option"); |
858634ff ZJS |
948 | } |
949 | ||
baaa35ad ZJS |
950 | if (optind < argc) |
951 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
952 | "This program does not take arguments."); | |
858634ff | 953 | |
baaa35ad ZJS |
954 | if (!!arg_key_pem != !!arg_cert_pem) |
955 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
956 | "Certificate and key files must be specified together"); | |
7b17a7d7 | 957 | |
baaa35ad ZJS |
958 | if (arg_trust_pem && !arg_key_pem) |
959 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
960 | "CA certificate can only be used with certificate file"); | |
e5ebe12b | 961 | |
858634ff ZJS |
962 | return 1; |
963 | } | |
964 | ||
29cd4c8f | 965 | static int run(int argc, char *argv[]) { |
0d2a1a20 | 966 | _cleanup_(MHD_stop_daemonp) struct MHD_Daemon *d = NULL; |
29cd4c8f YW |
967 | struct MHD_OptionItem opts[] = { |
968 | { MHD_OPTION_NOTIFY_COMPLETED, | |
969 | (intptr_t) request_meta_free, NULL }, | |
970 | { MHD_OPTION_EXTERNAL_LOGGER, | |
971 | (intptr_t) microhttpd_logger, NULL }, | |
972 | { MHD_OPTION_END, 0, NULL }, | |
973 | { MHD_OPTION_END, 0, NULL }, | |
974 | { MHD_OPTION_END, 0, NULL }, | |
975 | { MHD_OPTION_END, 0, NULL }, | |
976 | { MHD_OPTION_END, 0, NULL }, | |
977 | }; | |
978 | int opts_pos = 2; | |
979 | ||
980 | /* We force MHD_USE_ITC here, in order to make sure | |
981 | * libmicrohttpd doesn't use shutdown() on our listening | |
982 | * socket, which would break socket re-activation. See | |
983 | * | |
984 | * https://lists.gnu.org/archive/html/libmicrohttpd/2015-09/msg00014.html | |
985 | * https://github.com/systemd/systemd/pull/1286 | |
986 | */ | |
987 | ||
988 | int flags = | |
989 | MHD_USE_DEBUG | | |
990 | MHD_USE_DUAL_STACK | | |
991 | MHD_USE_ITC | | |
992 | MHD_USE_POLL_INTERNAL_THREAD | | |
993 | MHD_USE_THREAD_PER_CONNECTION; | |
858634ff ZJS |
994 | int r, n; |
995 | ||
6bf3c61c | 996 | log_setup_service(); |
7b17a7d7 | 997 | |
858634ff | 998 | r = parse_argv(argc, argv); |
29cd4c8f YW |
999 | if (r <= 0) |
1000 | return r; | |
858634ff | 1001 | |
2cf4172a LP |
1002 | sigbus_install(); |
1003 | ||
d357562c ZJS |
1004 | r = setup_gnutls_logger(NULL); |
1005 | if (r < 0) | |
29cd4c8f | 1006 | return r; |
cafc7f91 | 1007 | |
7b17a7d7 | 1008 | n = sd_listen_fds(1); |
29cd4c8f YW |
1009 | if (n < 0) |
1010 | return log_error_errno(n, "Failed to determine passed sockets: %m"); | |
1011 | if (n > 1) | |
1012 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Can't listen on more than one socket."); | |
1013 | ||
1014 | if (n == 1) | |
1015 | opts[opts_pos++] = (struct MHD_OptionItem) | |
1016 | { MHD_OPTION_LISTEN_SOCKET, SD_LISTEN_FDS_START }; | |
1017 | ||
1018 | if (arg_key_pem) { | |
1019 | assert(arg_cert_pem); | |
1020 | opts[opts_pos++] = (struct MHD_OptionItem) | |
1021 | { MHD_OPTION_HTTPS_MEM_KEY, 0, arg_key_pem }; | |
1022 | opts[opts_pos++] = (struct MHD_OptionItem) | |
1023 | { MHD_OPTION_HTTPS_MEM_CERT, 0, arg_cert_pem }; | |
1024 | flags |= MHD_USE_TLS; | |
7b17a7d7 LP |
1025 | } |
1026 | ||
29cd4c8f YW |
1027 | if (arg_trust_pem) { |
1028 | assert(flags & MHD_USE_TLS); | |
1029 | opts[opts_pos++] = (struct MHD_OptionItem) | |
1030 | { MHD_OPTION_HTTPS_MEM_TRUST, 0, arg_trust_pem }; | |
7b17a7d7 LP |
1031 | } |
1032 | ||
29cd4c8f YW |
1033 | d = MHD_start_daemon(flags, 19531, |
1034 | NULL, NULL, | |
1035 | request_handler, NULL, | |
1036 | MHD_OPTION_ARRAY, opts, | |
1037 | MHD_OPTION_END); | |
1038 | if (!d) | |
1039 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Failed to start daemon!"); | |
7b17a7d7 | 1040 | |
29cd4c8f | 1041 | pause(); |
7b17a7d7 | 1042 | |
29cd4c8f | 1043 | return 0; |
7b17a7d7 | 1044 | } |
29cd4c8f YW |
1045 | |
1046 | DEFINE_MAIN_FUNCTION(run); |