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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a45b9fca LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2011 Lennart Poettering | |
a45b9fca LP |
6 | ***/ |
7 | ||
4871690d | 8 | #include <stddef.h> |
07630cea | 9 | #include <unistd.h> |
a45b9fca | 10 | |
349cc4a5 | 11 | #if HAVE_SELINUX |
a45b9fca LP |
12 | #include <selinux/selinux.h> |
13 | #endif | |
14 | ||
13790add | 15 | #include "sd-daemon.h" |
4f5dd394 LP |
16 | #include "sd-event.h" |
17 | ||
b5efdb8a | 18 | #include "alloc-util.h" |
a0956174 | 19 | #include "dirent-util.h" |
4f5dd394 | 20 | #include "escape.h" |
3ffd4af2 | 21 | #include "fd-util.h" |
13790add | 22 | #include "fileio.h" |
afc5dbf3 | 23 | #include "io-util.h" |
4f5dd394 | 24 | #include "journald-console.h" |
22e3a02b | 25 | #include "journald-context.h" |
4f5dd394 | 26 | #include "journald-kmsg.h" |
d025f1e4 | 27 | #include "journald-server.h" |
3ffd4af2 | 28 | #include "journald-stream.h" |
a45b9fca | 29 | #include "journald-syslog.h" |
40b71e89 | 30 | #include "journald-wall.h" |
4f5dd394 | 31 | #include "mkdir.h" |
6bedfcbb | 32 | #include "parse-util.h" |
22e3a02b | 33 | #include "process-util.h" |
4f5dd394 LP |
34 | #include "selinux-util.h" |
35 | #include "socket-util.h" | |
15a5e950 | 36 | #include "stdio-util.h" |
07630cea | 37 | #include "string-util.h" |
7ccbd1ae | 38 | #include "syslog-util.h" |
7a1f1aaa | 39 | #include "unit-name.h" |
a45b9fca LP |
40 | |
41 | #define STDOUT_STREAMS_MAX 4096 | |
42 | ||
43 | typedef enum StdoutStreamState { | |
44 | STDOUT_STREAM_IDENTIFIER, | |
45 | STDOUT_STREAM_UNIT_ID, | |
46 | STDOUT_STREAM_PRIORITY, | |
47 | STDOUT_STREAM_LEVEL_PREFIX, | |
48 | STDOUT_STREAM_FORWARD_TO_SYSLOG, | |
49 | STDOUT_STREAM_FORWARD_TO_KMSG, | |
50 | STDOUT_STREAM_FORWARD_TO_CONSOLE, | |
51 | STDOUT_STREAM_RUNNING | |
52 | } StdoutStreamState; | |
53 | ||
ec20fe5f LP |
54 | /* The different types of log record terminators: a real \n was read, a NUL character was read, the maximum line length |
55 | * was reached, or the end of the stream was reached */ | |
56 | ||
57 | typedef enum LineBreak { | |
58 | LINE_BREAK_NEWLINE, | |
59 | LINE_BREAK_NUL, | |
60 | LINE_BREAK_LINE_MAX, | |
61 | LINE_BREAK_EOF, | |
62 | } LineBreak; | |
63 | ||
a45b9fca LP |
64 | struct StdoutStream { |
65 | Server *server; | |
66 | StdoutStreamState state; | |
67 | ||
68 | int fd; | |
69 | ||
70 | struct ucred ucred; | |
2de56f70 | 71 | char *label; |
a45b9fca LP |
72 | char *identifier; |
73 | char *unit_id; | |
74 | int priority; | |
75 | bool level_prefix:1; | |
76 | bool forward_to_syslog:1; | |
77 | bool forward_to_kmsg:1; | |
78 | bool forward_to_console:1; | |
79 | ||
13790add | 80 | bool fdstore:1; |
e22aa3d3 | 81 | bool in_notify_queue:1; |
13790add | 82 | |
ec20fe5f | 83 | char *buffer; |
a45b9fca | 84 | size_t length; |
ec20fe5f | 85 | size_t allocated; |
a45b9fca | 86 | |
f9a810be LP |
87 | sd_event_source *event_source; |
88 | ||
13790add LP |
89 | char *state_file; |
90 | ||
22e3a02b LP |
91 | ClientContext *context; |
92 | ||
a45b9fca | 93 | LIST_FIELDS(StdoutStream, stdout_stream); |
e22aa3d3 | 94 | LIST_FIELDS(StdoutStream, stdout_stream_notify_queue); |
ec20fe5f | 95 | |
fbd0b64f | 96 | char id_field[STRLEN("_STREAM_ID=") + SD_ID128_STRING_MAX]; |
a45b9fca LP |
97 | }; |
98 | ||
13790add LP |
99 | void stdout_stream_free(StdoutStream *s) { |
100 | if (!s) | |
101 | return; | |
102 | ||
103 | if (s->server) { | |
22e3a02b LP |
104 | |
105 | if (s->context) | |
106 | client_context_release(s->server, s->context); | |
107 | ||
13790add | 108 | assert(s->server->n_stdout_streams > 0); |
313cefa1 | 109 | s->server->n_stdout_streams--; |
13790add | 110 | LIST_REMOVE(stdout_stream, s->server->stdout_streams, s); |
e22aa3d3 LP |
111 | |
112 | if (s->in_notify_queue) | |
113 | LIST_REMOVE(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s); | |
13790add LP |
114 | } |
115 | ||
116 | if (s->event_source) { | |
117 | sd_event_source_set_enabled(s->event_source, SD_EVENT_OFF); | |
118 | s->event_source = sd_event_source_unref(s->event_source); | |
119 | } | |
120 | ||
121 | safe_close(s->fd); | |
2de56f70 | 122 | free(s->label); |
13790add LP |
123 | free(s->identifier); |
124 | free(s->unit_id); | |
125 | free(s->state_file); | |
ec20fe5f | 126 | free(s->buffer); |
13790add LP |
127 | |
128 | free(s); | |
129 | } | |
130 | ||
131 | DEFINE_TRIVIAL_CLEANUP_FUNC(StdoutStream*, stdout_stream_free); | |
132 | ||
133 | static void stdout_stream_destroy(StdoutStream *s) { | |
134 | if (!s) | |
135 | return; | |
136 | ||
137 | if (s->state_file) | |
e22aa3d3 | 138 | (void) unlink(s->state_file); |
13790add LP |
139 | |
140 | stdout_stream_free(s); | |
141 | } | |
142 | ||
143 | static int stdout_stream_save(StdoutStream *s) { | |
144 | _cleanup_free_ char *temp_path = NULL; | |
145 | _cleanup_fclose_ FILE *f = NULL; | |
146 | int r; | |
147 | ||
148 | assert(s); | |
149 | ||
150 | if (s->state != STDOUT_STREAM_RUNNING) | |
151 | return 0; | |
152 | ||
153 | if (!s->state_file) { | |
154 | struct stat st; | |
155 | ||
156 | r = fstat(s->fd, &st); | |
157 | if (r < 0) | |
158 | return log_warning_errno(errno, "Failed to stat connected stream: %m"); | |
159 | ||
160 | /* We use device and inode numbers as identifier for the stream */ | |
161 | if (asprintf(&s->state_file, "/run/systemd/journal/streams/%lu:%lu", (unsigned long) st.st_dev, (unsigned long) st.st_ino) < 0) | |
162 | return log_oom(); | |
163 | } | |
164 | ||
165 | mkdir_p("/run/systemd/journal/streams", 0755); | |
166 | ||
167 | r = fopen_temporary(s->state_file, &f, &temp_path); | |
168 | if (r < 0) | |
dacd6cee | 169 | goto fail; |
13790add LP |
170 | |
171 | fprintf(f, | |
172 | "# This is private data. Do not parse\n" | |
173 | "PRIORITY=%i\n" | |
174 | "LEVEL_PREFIX=%i\n" | |
175 | "FORWARD_TO_SYSLOG=%i\n" | |
176 | "FORWARD_TO_KMSG=%i\n" | |
ec20fe5f LP |
177 | "FORWARD_TO_CONSOLE=%i\n" |
178 | "STREAM_ID=%s\n", | |
13790add LP |
179 | s->priority, |
180 | s->level_prefix, | |
181 | s->forward_to_syslog, | |
182 | s->forward_to_kmsg, | |
ec20fe5f | 183 | s->forward_to_console, |
fbd0b64f | 184 | s->id_field + STRLEN("_STREAM_ID=")); |
13790add LP |
185 | |
186 | if (!isempty(s->identifier)) { | |
187 | _cleanup_free_ char *escaped; | |
188 | ||
189 | escaped = cescape(s->identifier); | |
190 | if (!escaped) { | |
191 | r = -ENOMEM; | |
dacd6cee | 192 | goto fail; |
13790add LP |
193 | } |
194 | ||
195 | fprintf(f, "IDENTIFIER=%s\n", escaped); | |
196 | } | |
197 | ||
198 | if (!isempty(s->unit_id)) { | |
199 | _cleanup_free_ char *escaped; | |
200 | ||
201 | escaped = cescape(s->unit_id); | |
202 | if (!escaped) { | |
203 | r = -ENOMEM; | |
dacd6cee | 204 | goto fail; |
13790add LP |
205 | } |
206 | ||
207 | fprintf(f, "UNIT=%s\n", escaped); | |
208 | } | |
209 | ||
210 | r = fflush_and_check(f); | |
211 | if (r < 0) | |
dacd6cee | 212 | goto fail; |
13790add LP |
213 | |
214 | if (rename(temp_path, s->state_file) < 0) { | |
215 | r = -errno; | |
dacd6cee | 216 | goto fail; |
13790add LP |
217 | } |
218 | ||
e22aa3d3 LP |
219 | if (!s->fdstore && !s->in_notify_queue) { |
220 | LIST_PREPEND(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s); | |
221 | s->in_notify_queue = true; | |
222 | ||
223 | if (s->server->notify_event_source) { | |
224 | r = sd_event_source_set_enabled(s->server->notify_event_source, SD_EVENT_ON); | |
225 | if (r < 0) | |
226 | log_warning_errno(r, "Failed to enable notify event source: %m"); | |
227 | } | |
13790add LP |
228 | } |
229 | ||
dacd6cee | 230 | return 0; |
13790add | 231 | |
dacd6cee LP |
232 | fail: |
233 | (void) unlink(s->state_file); | |
234 | ||
235 | if (temp_path) | |
236 | (void) unlink(temp_path); | |
13790add | 237 | |
dacd6cee | 238 | return log_error_errno(r, "Failed to save stream data %s: %m", s->state_file); |
13790add LP |
239 | } |
240 | ||
ec20fe5f | 241 | static int stdout_stream_log(StdoutStream *s, const char *p, LineBreak line_break) { |
d3070fbd | 242 | struct iovec *iovec; |
a45b9fca | 243 | int priority; |
e3bfb7be | 244 | char syslog_priority[] = "PRIORITY=\0"; |
fbd0b64f | 245 | char syslog_facility[STRLEN("SYSLOG_FACILITY=") + DECIMAL_STR_MAX(int) + 1]; |
e3bfb7be | 246 | _cleanup_free_ char *message = NULL, *syslog_identifier = NULL; |
d3070fbd | 247 | size_t n = 0, m; |
22e3a02b | 248 | int r; |
a45b9fca LP |
249 | |
250 | assert(s); | |
251 | assert(p); | |
252 | ||
d3070fbd LP |
253 | if (s->context) |
254 | (void) client_context_maybe_refresh(s->server, s->context, NULL, NULL, 0, NULL, USEC_INFINITY); | |
255 | else if (pid_is_valid(s->ucred.pid)) { | |
256 | r = client_context_acquire(s->server, s->ucred.pid, &s->ucred, s->label, strlen_ptr(s->label), s->unit_id, &s->context); | |
257 | if (r < 0) | |
258 | log_warning_errno(r, "Failed to acquire client context, ignoring: %m"); | |
259 | } | |
260 | ||
a45b9fca LP |
261 | priority = s->priority; |
262 | ||
263 | if (s->level_prefix) | |
e3bfb7be | 264 | syslog_parse_priority(&p, &priority, false); |
a45b9fca | 265 | |
d3070fbd LP |
266 | if (!client_context_test_priority(s->context, priority)) |
267 | return 0; | |
268 | ||
6f526243 EV |
269 | if (isempty(p)) |
270 | return 0; | |
271 | ||
a45b9fca LP |
272 | if (s->forward_to_syslog || s->server->forward_to_syslog) |
273 | server_forward_syslog(s->server, syslog_fixup_facility(priority), s->identifier, p, &s->ucred, NULL); | |
274 | ||
275 | if (s->forward_to_kmsg || s->server->forward_to_kmsg) | |
276 | server_forward_kmsg(s->server, priority, s->identifier, p, &s->ucred); | |
277 | ||
278 | if (s->forward_to_console || s->server->forward_to_console) | |
279 | server_forward_console(s->server, priority, s->identifier, p, &s->ucred); | |
280 | ||
40b71e89 ST |
281 | if (s->server->forward_to_wall) |
282 | server_forward_wall(s->server, priority, s->identifier, p, &s->ucred); | |
283 | ||
d3070fbd LP |
284 | m = N_IOVEC_META_FIELDS + 7 + client_context_extra_fields_n_iovec(s->context); |
285 | iovec = newa(struct iovec, m); | |
286 | ||
e6a7ec4b LP |
287 | iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=stdout"); |
288 | iovec[n++] = IOVEC_MAKE_STRING(s->id_field); | |
ec20fe5f | 289 | |
fbd0b64f | 290 | syslog_priority[STRLEN("PRIORITY=")] = '0' + LOG_PRI(priority); |
e6a7ec4b | 291 | iovec[n++] = IOVEC_MAKE_STRING(syslog_priority); |
a45b9fca | 292 | |
e3bfb7be | 293 | if (priority & LOG_FACMASK) { |
5ffa8c81 | 294 | xsprintf(syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)); |
e6a7ec4b | 295 | iovec[n++] = IOVEC_MAKE_STRING(syslog_facility); |
e3bfb7be | 296 | } |
a45b9fca LP |
297 | |
298 | if (s->identifier) { | |
299 | syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier); | |
300 | if (syslog_identifier) | |
e6a7ec4b | 301 | iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier); |
a45b9fca LP |
302 | } |
303 | ||
ec20fe5f LP |
304 | if (line_break != LINE_BREAK_NEWLINE) { |
305 | const char *c; | |
306 | ||
307 | /* If this log message was generated due to an uncommon line break then mention this in the log | |
308 | * entry */ | |
309 | ||
310 | c = line_break == LINE_BREAK_NUL ? "_LINE_BREAK=nul" : | |
311 | line_break == LINE_BREAK_LINE_MAX ? "_LINE_BREAK=line-max" : | |
312 | "_LINE_BREAK=eof"; | |
e6a7ec4b | 313 | iovec[n++] = IOVEC_MAKE_STRING(c); |
ec20fe5f LP |
314 | } |
315 | ||
a45b9fca LP |
316 | message = strappend("MESSAGE=", p); |
317 | if (message) | |
e6a7ec4b | 318 | iovec[n++] = IOVEC_MAKE_STRING(message); |
a45b9fca | 319 | |
d3070fbd | 320 | server_dispatch_message(s->server, iovec, n, m, s->context, NULL, priority, 0); |
a45b9fca LP |
321 | return 0; |
322 | } | |
323 | ||
ec20fe5f | 324 | static int stdout_stream_line(StdoutStream *s, char *p, LineBreak line_break) { |
a45b9fca | 325 | int r; |
cfa1b98e | 326 | char *orig; |
a45b9fca LP |
327 | |
328 | assert(s); | |
329 | assert(p); | |
330 | ||
cfa1b98e | 331 | orig = p; |
a45b9fca LP |
332 | p = strstrip(p); |
333 | ||
ec20fe5f LP |
334 | /* line breaks by NUL, line max length or EOF are not permissible during the negotiation part of the protocol */ |
335 | if (line_break != LINE_BREAK_NEWLINE && s->state != STDOUT_STREAM_RUNNING) { | |
336 | log_warning("Control protocol line not properly terminated."); | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
a45b9fca LP |
340 | switch (s->state) { |
341 | ||
342 | case STDOUT_STREAM_IDENTIFIER: | |
7a1f1aaa | 343 | if (!isempty(p)) { |
a45b9fca LP |
344 | s->identifier = strdup(p); |
345 | if (!s->identifier) | |
346 | return log_oom(); | |
347 | } | |
348 | ||
349 | s->state = STDOUT_STREAM_UNIT_ID; | |
350 | return 0; | |
351 | ||
352 | case STDOUT_STREAM_UNIT_ID: | |
7a1f1aaa LP |
353 | if (s->ucred.uid == 0 && |
354 | unit_name_is_valid(p, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE)) { | |
355 | ||
356 | s->unit_id = strdup(p); | |
357 | if (!s->unit_id) | |
358 | return log_oom(); | |
a45b9fca LP |
359 | } |
360 | ||
361 | s->state = STDOUT_STREAM_PRIORITY; | |
362 | return 0; | |
363 | ||
364 | case STDOUT_STREAM_PRIORITY: | |
365 | r = safe_atoi(p, &s->priority); | |
41891700 | 366 | if (r < 0 || s->priority < 0 || s->priority > 999) { |
a45b9fca LP |
367 | log_warning("Failed to parse log priority line."); |
368 | return -EINVAL; | |
369 | } | |
370 | ||
371 | s->state = STDOUT_STREAM_LEVEL_PREFIX; | |
372 | return 0; | |
373 | ||
374 | case STDOUT_STREAM_LEVEL_PREFIX: | |
375 | r = parse_boolean(p); | |
376 | if (r < 0) { | |
377 | log_warning("Failed to parse level prefix line."); | |
378 | return -EINVAL; | |
379 | } | |
380 | ||
381 | s->level_prefix = !!r; | |
382 | s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG; | |
383 | return 0; | |
384 | ||
385 | case STDOUT_STREAM_FORWARD_TO_SYSLOG: | |
386 | r = parse_boolean(p); | |
387 | if (r < 0) { | |
388 | log_warning("Failed to parse forward to syslog line."); | |
389 | return -EINVAL; | |
390 | } | |
391 | ||
392 | s->forward_to_syslog = !!r; | |
393 | s->state = STDOUT_STREAM_FORWARD_TO_KMSG; | |
394 | return 0; | |
395 | ||
396 | case STDOUT_STREAM_FORWARD_TO_KMSG: | |
397 | r = parse_boolean(p); | |
398 | if (r < 0) { | |
399 | log_warning("Failed to parse copy to kmsg line."); | |
400 | return -EINVAL; | |
401 | } | |
402 | ||
403 | s->forward_to_kmsg = !!r; | |
404 | s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE; | |
405 | return 0; | |
406 | ||
407 | case STDOUT_STREAM_FORWARD_TO_CONSOLE: | |
408 | r = parse_boolean(p); | |
409 | if (r < 0) { | |
410 | log_warning("Failed to parse copy to console line."); | |
411 | return -EINVAL; | |
412 | } | |
413 | ||
414 | s->forward_to_console = !!r; | |
415 | s->state = STDOUT_STREAM_RUNNING; | |
13790add LP |
416 | |
417 | /* Try to save the stream, so that journald can be restarted and we can recover */ | |
418 | (void) stdout_stream_save(s); | |
a45b9fca LP |
419 | return 0; |
420 | ||
421 | case STDOUT_STREAM_RUNNING: | |
ec20fe5f | 422 | return stdout_stream_log(s, orig, line_break); |
a45b9fca LP |
423 | } |
424 | ||
425 | assert_not_reached("Unknown stream state"); | |
426 | } | |
427 | ||
428 | static int stdout_stream_scan(StdoutStream *s, bool force_flush) { | |
429 | char *p; | |
430 | size_t remaining; | |
431 | int r; | |
432 | ||
433 | assert(s); | |
434 | ||
435 | p = s->buffer; | |
436 | remaining = s->length; | |
95cbb83c VC |
437 | |
438 | /* XXX: This function does nothing if (s->length == 0) */ | |
439 | ||
a45b9fca | 440 | for (;;) { |
ec20fe5f | 441 | LineBreak line_break; |
a45b9fca | 442 | size_t skip; |
ec20fe5f LP |
443 | char *end1, *end2; |
444 | ||
445 | end1 = memchr(p, '\n', remaining); | |
446 | end2 = memchr(p, 0, end1 ? (size_t) (end1 - p) : remaining); | |
447 | ||
448 | if (end2) { | |
449 | /* We found a NUL terminator */ | |
450 | skip = end2 - p + 1; | |
451 | line_break = LINE_BREAK_NUL; | |
452 | } else if (end1) { | |
453 | /* We found a \n terminator */ | |
454 | *end1 = 0; | |
455 | skip = end1 - p + 1; | |
456 | line_break = LINE_BREAK_NEWLINE; | |
457 | } else if (remaining >= s->server->line_max) { | |
458 | /* Force a line break after the maximum line length */ | |
459 | *(p + s->server->line_max) = 0; | |
a45b9fca | 460 | skip = remaining; |
ec20fe5f | 461 | line_break = LINE_BREAK_LINE_MAX; |
a45b9fca LP |
462 | } else |
463 | break; | |
464 | ||
ec20fe5f | 465 | r = stdout_stream_line(s, p, line_break); |
a45b9fca LP |
466 | if (r < 0) |
467 | return r; | |
468 | ||
469 | remaining -= skip; | |
470 | p += skip; | |
471 | } | |
472 | ||
473 | if (force_flush && remaining > 0) { | |
474 | p[remaining] = 0; | |
ec20fe5f | 475 | r = stdout_stream_line(s, p, LINE_BREAK_EOF); |
a45b9fca LP |
476 | if (r < 0) |
477 | return r; | |
478 | ||
479 | p += remaining; | |
480 | remaining = 0; | |
481 | } | |
482 | ||
483 | if (p > s->buffer) { | |
484 | memmove(s->buffer, p, remaining); | |
485 | s->length = remaining; | |
486 | } | |
487 | ||
488 | return 0; | |
489 | } | |
490 | ||
f9a810be LP |
491 | static int stdout_stream_process(sd_event_source *es, int fd, uint32_t revents, void *userdata) { |
492 | StdoutStream *s = userdata; | |
ec20fe5f | 493 | size_t limit; |
a45b9fca LP |
494 | ssize_t l; |
495 | int r; | |
496 | ||
497 | assert(s); | |
498 | ||
f9a810be LP |
499 | if ((revents|EPOLLIN|EPOLLHUP) != (EPOLLIN|EPOLLHUP)) { |
500 | log_error("Got invalid event from epoll for stdout stream: %"PRIx32, revents); | |
91bf3b3e | 501 | goto terminate; |
f9a810be LP |
502 | } |
503 | ||
ec20fe5f LP |
504 | /* If the buffer is full already (discounting the extra NUL we need), add room for another 1K */ |
505 | if (s->length + 1 >= s->allocated) { | |
506 | if (!GREEDY_REALLOC(s->buffer, s->allocated, s->length + 1 + 1024)) { | |
507 | log_oom(); | |
508 | goto terminate; | |
509 | } | |
510 | } | |
a45b9fca | 511 | |
ec20fe5f LP |
512 | /* Try to make use of the allocated buffer in full, but never read more than the configured line size. Also, |
513 | * always leave room for a terminating NUL we might need to add. */ | |
514 | limit = MIN(s->allocated - 1, s->server->line_max); | |
515 | ||
516 | l = read(s->fd, s->buffer + s->length, limit - s->length); | |
517 | if (l < 0) { | |
a45b9fca LP |
518 | if (errno == EAGAIN) |
519 | return 0; | |
520 | ||
56f64d95 | 521 | log_warning_errno(errno, "Failed to read from stream: %m"); |
91bf3b3e | 522 | goto terminate; |
a45b9fca LP |
523 | } |
524 | ||
525 | if (l == 0) { | |
7b77ed8c | 526 | stdout_stream_scan(s, true); |
91bf3b3e | 527 | goto terminate; |
a45b9fca LP |
528 | } |
529 | ||
530 | s->length += l; | |
531 | r = stdout_stream_scan(s, false); | |
532 | if (r < 0) | |
91bf3b3e | 533 | goto terminate; |
a45b9fca LP |
534 | |
535 | return 1; | |
536 | ||
91bf3b3e | 537 | terminate: |
13790add | 538 | stdout_stream_destroy(s); |
f9a810be | 539 | return 0; |
a45b9fca LP |
540 | } |
541 | ||
13790add LP |
542 | static int stdout_stream_install(Server *s, int fd, StdoutStream **ret) { |
543 | _cleanup_(stdout_stream_freep) StdoutStream *stream = NULL; | |
ec20fe5f | 544 | sd_id128_t id; |
13790add LP |
545 | int r; |
546 | ||
a45b9fca | 547 | assert(s); |
13790add | 548 | assert(fd >= 0); |
a45b9fca | 549 | |
ec20fe5f LP |
550 | r = sd_id128_randomize(&id); |
551 | if (r < 0) | |
552 | return log_error_errno(r, "Failed to generate stream ID: %m"); | |
553 | ||
13790add LP |
554 | stream = new0(StdoutStream, 1); |
555 | if (!stream) | |
556 | return log_oom(); | |
a45b9fca | 557 | |
13790add LP |
558 | stream->fd = -1; |
559 | stream->priority = LOG_INFO; | |
a45b9fca | 560 | |
ec20fe5f LP |
561 | xsprintf(stream->id_field, "_STREAM_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(id)); |
562 | ||
13790add LP |
563 | r = getpeercred(fd, &stream->ucred); |
564 | if (r < 0) | |
565 | return log_error_errno(r, "Failed to determine peer credentials: %m"); | |
a45b9fca | 566 | |
6d395665 | 567 | if (mac_selinux_use()) { |
2de56f70 ZJS |
568 | r = getpeersec(fd, &stream->label); |
569 | if (r < 0 && r != -EOPNOTSUPP) | |
570 | (void) log_warning_errno(r, "Failed to determine peer security context: %m"); | |
13790add | 571 | } |
a45b9fca | 572 | |
13790add LP |
573 | (void) shutdown(fd, SHUT_WR); |
574 | ||
575 | r = sd_event_add_io(s->event, &stream->event_source, fd, EPOLLIN, stdout_stream_process, stream); | |
576 | if (r < 0) | |
577 | return log_error_errno(r, "Failed to add stream to event loop: %m"); | |
578 | ||
579 | r = sd_event_source_set_priority(stream->event_source, SD_EVENT_PRIORITY_NORMAL+5); | |
580 | if (r < 0) | |
581 | return log_error_errno(r, "Failed to adjust stdout event source priority: %m"); | |
582 | ||
583 | stream->fd = fd; | |
584 | ||
585 | stream->server = s; | |
586 | LIST_PREPEND(stdout_stream, s->stdout_streams, stream); | |
313cefa1 | 587 | s->n_stdout_streams++; |
13790add LP |
588 | |
589 | if (ret) | |
590 | *ret = stream; | |
591 | ||
592 | stream = NULL; | |
593 | ||
594 | return 0; | |
a45b9fca LP |
595 | } |
596 | ||
f9a810be | 597 | static int stdout_stream_new(sd_event_source *es, int listen_fd, uint32_t revents, void *userdata) { |
13790add | 598 | _cleanup_close_ int fd = -1; |
f9a810be | 599 | Server *s = userdata; |
13790add | 600 | int r; |
a45b9fca LP |
601 | |
602 | assert(s); | |
603 | ||
f9a810be LP |
604 | if (revents != EPOLLIN) { |
605 | log_error("Got invalid event from epoll for stdout server fd: %"PRIx32, revents); | |
606 | return -EIO; | |
607 | } | |
608 | ||
a45b9fca LP |
609 | fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); |
610 | if (fd < 0) { | |
611 | if (errno == EAGAIN) | |
612 | return 0; | |
613 | ||
e1427b13 | 614 | return log_error_errno(errno, "Failed to accept stdout connection: %m"); |
a45b9fca LP |
615 | } |
616 | ||
617 | if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) { | |
618 | log_warning("Too many stdout streams, refusing connection."); | |
a45b9fca LP |
619 | return 0; |
620 | } | |
621 | ||
13790add LP |
622 | r = stdout_stream_install(s, fd, NULL); |
623 | if (r < 0) | |
624 | return r; | |
625 | ||
626 | fd = -1; | |
627 | return 0; | |
628 | } | |
629 | ||
630 | static int stdout_stream_load(StdoutStream *stream, const char *fname) { | |
631 | _cleanup_free_ char | |
632 | *priority = NULL, | |
633 | *level_prefix = NULL, | |
634 | *forward_to_syslog = NULL, | |
635 | *forward_to_kmsg = NULL, | |
ec20fe5f LP |
636 | *forward_to_console = NULL, |
637 | *stream_id = NULL; | |
13790add LP |
638 | int r; |
639 | ||
640 | assert(stream); | |
641 | assert(fname); | |
642 | ||
643 | if (!stream->state_file) { | |
644 | stream->state_file = strappend("/run/systemd/journal/streams/", fname); | |
645 | if (!stream->state_file) | |
646 | return log_oom(); | |
a45b9fca LP |
647 | } |
648 | ||
13790add LP |
649 | r = parse_env_file(stream->state_file, NEWLINE, |
650 | "PRIORITY", &priority, | |
651 | "LEVEL_PREFIX", &level_prefix, | |
652 | "FORWARD_TO_SYSLOG", &forward_to_syslog, | |
653 | "FORWARD_TO_KMSG", &forward_to_kmsg, | |
654 | "FORWARD_TO_CONSOLE", &forward_to_console, | |
655 | "IDENTIFIER", &stream->identifier, | |
656 | "UNIT", &stream->unit_id, | |
ec20fe5f | 657 | "STREAM_ID", &stream_id, |
13790add LP |
658 | NULL); |
659 | if (r < 0) | |
660 | return log_error_errno(r, "Failed to read: %s", stream->state_file); | |
a45b9fca | 661 | |
13790add LP |
662 | if (priority) { |
663 | int p; | |
664 | ||
665 | p = log_level_from_string(priority); | |
666 | if (p >= 0) | |
667 | stream->priority = p; | |
a45b9fca LP |
668 | } |
669 | ||
13790add LP |
670 | if (level_prefix) { |
671 | r = parse_boolean(level_prefix); | |
672 | if (r >= 0) | |
673 | stream->level_prefix = r; | |
d682b3a7 | 674 | } |
a45b9fca | 675 | |
13790add LP |
676 | if (forward_to_syslog) { |
677 | r = parse_boolean(forward_to_syslog); | |
678 | if (r >= 0) | |
679 | stream->forward_to_syslog = r; | |
a45b9fca LP |
680 | } |
681 | ||
13790add LP |
682 | if (forward_to_kmsg) { |
683 | r = parse_boolean(forward_to_kmsg); | |
684 | if (r >= 0) | |
685 | stream->forward_to_kmsg = r; | |
f9a810be LP |
686 | } |
687 | ||
13790add LP |
688 | if (forward_to_console) { |
689 | r = parse_boolean(forward_to_console); | |
690 | if (r >= 0) | |
691 | stream->forward_to_console = r; | |
a45b9fca LP |
692 | } |
693 | ||
ec20fe5f LP |
694 | if (stream_id) { |
695 | sd_id128_t id; | |
696 | ||
697 | r = sd_id128_from_string(stream_id, &id); | |
698 | if (r >= 0) | |
699 | xsprintf(stream->id_field, "_STREAM_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(id)); | |
700 | } | |
701 | ||
13790add LP |
702 | return 0; |
703 | } | |
704 | ||
705 | static int stdout_stream_restore(Server *s, const char *fname, int fd) { | |
706 | StdoutStream *stream; | |
707 | int r; | |
708 | ||
709 | assert(s); | |
710 | assert(fname); | |
711 | assert(fd >= 0); | |
712 | ||
713 | if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) { | |
714 | log_warning("Too many stdout streams, refusing restoring of stream."); | |
715 | return -ENOBUFS; | |
716 | } | |
717 | ||
718 | r = stdout_stream_install(s, fd, &stream); | |
719 | if (r < 0) | |
720 | return r; | |
721 | ||
722 | stream->state = STDOUT_STREAM_RUNNING; | |
723 | stream->fdstore = true; | |
724 | ||
725 | /* Ignore all parsing errors */ | |
726 | (void) stdout_stream_load(stream, fname); | |
a45b9fca LP |
727 | |
728 | return 0; | |
13790add LP |
729 | } |
730 | ||
15d91bff | 731 | int server_restore_streams(Server *s, FDSet *fds) { |
13790add LP |
732 | _cleanup_closedir_ DIR *d = NULL; |
733 | struct dirent *de; | |
734 | int r; | |
735 | ||
736 | d = opendir("/run/systemd/journal/streams"); | |
737 | if (!d) { | |
738 | if (errno == ENOENT) | |
739 | return 0; | |
740 | ||
741 | return log_warning_errno(errno, "Failed to enumerate /run/systemd/journal/streams: %m"); | |
742 | } | |
743 | ||
744 | FOREACH_DIRENT(de, d, goto fail) { | |
745 | unsigned long st_dev, st_ino; | |
746 | bool found = false; | |
747 | Iterator i; | |
748 | int fd; | |
749 | ||
750 | if (sscanf(de->d_name, "%lu:%lu", &st_dev, &st_ino) != 2) | |
751 | continue; | |
752 | ||
753 | FDSET_FOREACH(fd, fds, i) { | |
754 | struct stat st; | |
755 | ||
756 | if (fstat(fd, &st) < 0) | |
757 | return log_error_errno(errno, "Failed to stat %s: %m", de->d_name); | |
758 | ||
759 | if (S_ISSOCK(st.st_mode) && st.st_dev == st_dev && st.st_ino == st_ino) { | |
760 | found = true; | |
761 | break; | |
762 | } | |
763 | } | |
764 | ||
765 | if (!found) { | |
766 | /* No file descriptor? Then let's delete the state file */ | |
767 | log_debug("Cannot restore stream file %s", de->d_name); | |
cb51ee7a ZJS |
768 | if (unlinkat(dirfd(d), de->d_name, 0) < 0) |
769 | log_warning("Failed to remove /run/systemd/journal/streams/%s: %m", | |
770 | de->d_name); | |
13790add LP |
771 | continue; |
772 | } | |
773 | ||
774 | fdset_remove(fds, fd); | |
775 | ||
776 | r = stdout_stream_restore(s, de->d_name, fd); | |
777 | if (r < 0) | |
778 | safe_close(fd); | |
779 | } | |
a45b9fca | 780 | |
7b77ed8c | 781 | return 0; |
13790add LP |
782 | |
783 | fail: | |
784 | return log_error_errno(errno, "Failed to read streams directory: %m"); | |
a45b9fca LP |
785 | } |
786 | ||
15d91bff | 787 | int server_open_stdout_socket(Server *s) { |
fc2fffe7 LP |
788 | static const union sockaddr_union sa = { |
789 | .un.sun_family = AF_UNIX, | |
790 | .un.sun_path = "/run/systemd/journal/stdout", | |
791 | }; | |
a45b9fca | 792 | int r; |
a45b9fca LP |
793 | |
794 | assert(s); | |
795 | ||
796 | if (s->stdout_fd < 0) { | |
a45b9fca | 797 | s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); |
4a62c710 MS |
798 | if (s->stdout_fd < 0) |
799 | return log_error_errno(errno, "socket() failed: %m"); | |
a45b9fca | 800 | |
fc2fffe7 | 801 | (void) unlink(sa.un.sun_path); |
a45b9fca | 802 | |
fc2fffe7 | 803 | r = bind(s->stdout_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)); |
4a62c710 MS |
804 | if (r < 0) |
805 | return log_error_errno(errno, "bind(%s) failed: %m", sa.un.sun_path); | |
a45b9fca | 806 | |
4a61c3e5 | 807 | (void) chmod(sa.un.sun_path, 0666); |
a45b9fca | 808 | |
4a62c710 MS |
809 | if (listen(s->stdout_fd, SOMAXCONN) < 0) |
810 | return log_error_errno(errno, "listen(%s) failed: %m", sa.un.sun_path); | |
a45b9fca LP |
811 | } else |
812 | fd_nonblock(s->stdout_fd, 1); | |
813 | ||
151b9b96 | 814 | r = sd_event_add_io(s->event, &s->stdout_event_source, s->stdout_fd, EPOLLIN, stdout_stream_new, s); |
23bbb0de MS |
815 | if (r < 0) |
816 | return log_error_errno(r, "Failed to add stdout server fd to event source: %m"); | |
f9a810be | 817 | |
48cef295 | 818 | r = sd_event_source_set_priority(s->stdout_event_source, SD_EVENT_PRIORITY_NORMAL+5); |
23bbb0de MS |
819 | if (r < 0) |
820 | return log_error_errno(r, "Failed to adjust priority of stdout server event source: %m"); | |
a45b9fca LP |
821 | |
822 | return 0; | |
823 | } | |
e22aa3d3 LP |
824 | |
825 | void stdout_stream_send_notify(StdoutStream *s) { | |
826 | struct iovec iovec = { | |
827 | .iov_base = (char*) "FDSTORE=1", | |
fbd0b64f | 828 | .iov_len = STRLEN("FDSTORE=1"), |
e22aa3d3 LP |
829 | }; |
830 | struct msghdr msghdr = { | |
831 | .msg_iov = &iovec, | |
832 | .msg_iovlen = 1, | |
833 | }; | |
834 | struct cmsghdr *cmsg; | |
835 | ssize_t l; | |
836 | ||
837 | assert(s); | |
838 | assert(!s->fdstore); | |
839 | assert(s->in_notify_queue); | |
840 | assert(s->server); | |
841 | assert(s->server->notify_fd >= 0); | |
842 | ||
843 | /* Store the connection fd in PID 1, so that we get it passed | |
844 | * in again on next start */ | |
845 | ||
846 | msghdr.msg_controllen = CMSG_SPACE(sizeof(int)); | |
847 | msghdr.msg_control = alloca0(msghdr.msg_controllen); | |
848 | ||
849 | cmsg = CMSG_FIRSTHDR(&msghdr); | |
850 | cmsg->cmsg_level = SOL_SOCKET; | |
851 | cmsg->cmsg_type = SCM_RIGHTS; | |
852 | cmsg->cmsg_len = CMSG_LEN(sizeof(int)); | |
853 | ||
854 | memcpy(CMSG_DATA(cmsg), &s->fd, sizeof(int)); | |
855 | ||
856 | l = sendmsg(s->server->notify_fd, &msghdr, MSG_DONTWAIT|MSG_NOSIGNAL); | |
857 | if (l < 0) { | |
858 | if (errno == EAGAIN) | |
859 | return; | |
860 | ||
861 | log_error_errno(errno, "Failed to send stream file descriptor to service manager: %m"); | |
862 | } else { | |
863 | log_debug("Successfully sent stream file descriptor to service manager."); | |
864 | s->fdstore = 1; | |
865 | } | |
866 | ||
867 | LIST_REMOVE(stdout_stream_notify_queue, s->server->stdout_streams_notify_queue, s); | |
868 | s->in_notify_queue = false; | |
869 | ||
870 | } |