]>
Commit | Line | Data |
---|---|---|
a45b9fca LP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2011 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <fcntl.h> | |
23 | #include <unistd.h> | |
4871690d | 24 | #include <stddef.h> |
a45b9fca LP |
25 | #include <sys/epoll.h> |
26 | ||
27 | #ifdef HAVE_SELINUX | |
28 | #include <selinux/selinux.h> | |
29 | #endif | |
30 | ||
31 | #include "socket-util.h" | |
d025f1e4 | 32 | #include "journald-server.h" |
a45b9fca LP |
33 | #include "journald-stream.h" |
34 | #include "journald-syslog.h" | |
35 | #include "journald-kmsg.h" | |
3b7124a8 | 36 | #include "journald-console.h" |
a45b9fca LP |
37 | |
38 | #define STDOUT_STREAMS_MAX 4096 | |
39 | ||
40 | typedef enum StdoutStreamState { | |
41 | STDOUT_STREAM_IDENTIFIER, | |
42 | STDOUT_STREAM_UNIT_ID, | |
43 | STDOUT_STREAM_PRIORITY, | |
44 | STDOUT_STREAM_LEVEL_PREFIX, | |
45 | STDOUT_STREAM_FORWARD_TO_SYSLOG, | |
46 | STDOUT_STREAM_FORWARD_TO_KMSG, | |
47 | STDOUT_STREAM_FORWARD_TO_CONSOLE, | |
48 | STDOUT_STREAM_RUNNING | |
49 | } StdoutStreamState; | |
50 | ||
51 | struct StdoutStream { | |
52 | Server *server; | |
53 | StdoutStreamState state; | |
54 | ||
55 | int fd; | |
56 | ||
57 | struct ucred ucred; | |
58 | #ifdef HAVE_SELINUX | |
59 | security_context_t security_context; | |
60 | #endif | |
61 | ||
62 | char *identifier; | |
63 | char *unit_id; | |
64 | int priority; | |
65 | bool level_prefix:1; | |
66 | bool forward_to_syslog:1; | |
67 | bool forward_to_kmsg:1; | |
68 | bool forward_to_console:1; | |
69 | ||
70 | char buffer[LINE_MAX+1]; | |
71 | size_t length; | |
72 | ||
73 | LIST_FIELDS(StdoutStream, stdout_stream); | |
74 | }; | |
75 | ||
76 | static int stdout_stream_log(StdoutStream *s, const char *p) { | |
77 | struct iovec iovec[N_IOVEC_META_FIELDS + 5]; | |
78 | char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL; | |
79 | unsigned n = 0; | |
80 | int priority; | |
81 | char *label = NULL; | |
82 | size_t label_len = 0; | |
83 | ||
84 | assert(s); | |
85 | assert(p); | |
86 | ||
87 | if (isempty(p)) | |
88 | return 0; | |
89 | ||
90 | priority = s->priority; | |
91 | ||
92 | if (s->level_prefix) | |
93 | syslog_parse_priority((char**) &p, &priority); | |
94 | ||
95 | if (s->forward_to_syslog || s->server->forward_to_syslog) | |
96 | server_forward_syslog(s->server, syslog_fixup_facility(priority), s->identifier, p, &s->ucred, NULL); | |
97 | ||
98 | if (s->forward_to_kmsg || s->server->forward_to_kmsg) | |
99 | server_forward_kmsg(s->server, priority, s->identifier, p, &s->ucred); | |
100 | ||
101 | if (s->forward_to_console || s->server->forward_to_console) | |
102 | server_forward_console(s->server, priority, s->identifier, p, &s->ucred); | |
103 | ||
104 | IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout"); | |
105 | ||
106 | if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0) | |
107 | IOVEC_SET_STRING(iovec[n++], syslog_priority); | |
108 | ||
109 | if (priority & LOG_FACMASK) | |
110 | if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0) | |
111 | IOVEC_SET_STRING(iovec[n++], syslog_facility); | |
112 | ||
113 | if (s->identifier) { | |
114 | syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier); | |
115 | if (syslog_identifier) | |
116 | IOVEC_SET_STRING(iovec[n++], syslog_identifier); | |
117 | } | |
118 | ||
119 | message = strappend("MESSAGE=", p); | |
120 | if (message) | |
121 | IOVEC_SET_STRING(iovec[n++], message); | |
122 | ||
123 | #ifdef HAVE_SELINUX | |
124 | if (s->security_context) { | |
125 | label = (char*) s->security_context; | |
126 | label_len = strlen((char*) s->security_context); | |
127 | } | |
128 | #endif | |
129 | ||
130 | server_dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority); | |
131 | ||
132 | free(message); | |
133 | free(syslog_priority); | |
134 | free(syslog_facility); | |
135 | free(syslog_identifier); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | static int stdout_stream_line(StdoutStream *s, char *p) { | |
141 | int r; | |
142 | ||
143 | assert(s); | |
144 | assert(p); | |
145 | ||
146 | p = strstrip(p); | |
147 | ||
148 | switch (s->state) { | |
149 | ||
150 | case STDOUT_STREAM_IDENTIFIER: | |
151 | if (isempty(p)) | |
152 | s->identifier = NULL; | |
153 | else { | |
154 | s->identifier = strdup(p); | |
155 | if (!s->identifier) | |
156 | return log_oom(); | |
157 | } | |
158 | ||
159 | s->state = STDOUT_STREAM_UNIT_ID; | |
160 | return 0; | |
161 | ||
162 | case STDOUT_STREAM_UNIT_ID: | |
163 | if (s->ucred.uid == 0) { | |
164 | if (isempty(p)) | |
165 | s->unit_id = NULL; | |
166 | else { | |
167 | s->unit_id = strdup(p); | |
168 | if (!s->unit_id) | |
169 | return log_oom(); | |
170 | } | |
171 | } | |
172 | ||
173 | s->state = STDOUT_STREAM_PRIORITY; | |
174 | return 0; | |
175 | ||
176 | case STDOUT_STREAM_PRIORITY: | |
177 | r = safe_atoi(p, &s->priority); | |
41891700 | 178 | if (r < 0 || s->priority < 0 || s->priority > 999) { |
a45b9fca LP |
179 | log_warning("Failed to parse log priority line."); |
180 | return -EINVAL; | |
181 | } | |
182 | ||
183 | s->state = STDOUT_STREAM_LEVEL_PREFIX; | |
184 | return 0; | |
185 | ||
186 | case STDOUT_STREAM_LEVEL_PREFIX: | |
187 | r = parse_boolean(p); | |
188 | if (r < 0) { | |
189 | log_warning("Failed to parse level prefix line."); | |
190 | return -EINVAL; | |
191 | } | |
192 | ||
193 | s->level_prefix = !!r; | |
194 | s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG; | |
195 | return 0; | |
196 | ||
197 | case STDOUT_STREAM_FORWARD_TO_SYSLOG: | |
198 | r = parse_boolean(p); | |
199 | if (r < 0) { | |
200 | log_warning("Failed to parse forward to syslog line."); | |
201 | return -EINVAL; | |
202 | } | |
203 | ||
204 | s->forward_to_syslog = !!r; | |
205 | s->state = STDOUT_STREAM_FORWARD_TO_KMSG; | |
206 | return 0; | |
207 | ||
208 | case STDOUT_STREAM_FORWARD_TO_KMSG: | |
209 | r = parse_boolean(p); | |
210 | if (r < 0) { | |
211 | log_warning("Failed to parse copy to kmsg line."); | |
212 | return -EINVAL; | |
213 | } | |
214 | ||
215 | s->forward_to_kmsg = !!r; | |
216 | s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE; | |
217 | return 0; | |
218 | ||
219 | case STDOUT_STREAM_FORWARD_TO_CONSOLE: | |
220 | r = parse_boolean(p); | |
221 | if (r < 0) { | |
222 | log_warning("Failed to parse copy to console line."); | |
223 | return -EINVAL; | |
224 | } | |
225 | ||
226 | s->forward_to_console = !!r; | |
227 | s->state = STDOUT_STREAM_RUNNING; | |
228 | return 0; | |
229 | ||
230 | case STDOUT_STREAM_RUNNING: | |
231 | return stdout_stream_log(s, p); | |
232 | } | |
233 | ||
234 | assert_not_reached("Unknown stream state"); | |
235 | } | |
236 | ||
237 | static int stdout_stream_scan(StdoutStream *s, bool force_flush) { | |
238 | char *p; | |
239 | size_t remaining; | |
240 | int r; | |
241 | ||
242 | assert(s); | |
243 | ||
244 | p = s->buffer; | |
245 | remaining = s->length; | |
246 | for (;;) { | |
247 | char *end; | |
248 | size_t skip; | |
249 | ||
250 | end = memchr(p, '\n', remaining); | |
251 | if (end) | |
252 | skip = end - p + 1; | |
253 | else if (remaining >= sizeof(s->buffer) - 1) { | |
254 | end = p + sizeof(s->buffer) - 1; | |
255 | skip = remaining; | |
256 | } else | |
257 | break; | |
258 | ||
259 | *end = 0; | |
260 | ||
261 | r = stdout_stream_line(s, p); | |
262 | if (r < 0) | |
263 | return r; | |
264 | ||
265 | remaining -= skip; | |
266 | p += skip; | |
267 | } | |
268 | ||
269 | if (force_flush && remaining > 0) { | |
270 | p[remaining] = 0; | |
271 | r = stdout_stream_line(s, p); | |
272 | if (r < 0) | |
273 | return r; | |
274 | ||
275 | p += remaining; | |
276 | remaining = 0; | |
277 | } | |
278 | ||
279 | if (p > s->buffer) { | |
280 | memmove(s->buffer, p, remaining); | |
281 | s->length = remaining; | |
282 | } | |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | int stdout_stream_process(StdoutStream *s) { | |
288 | ssize_t l; | |
289 | int r; | |
290 | ||
291 | assert(s); | |
292 | ||
293 | l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length); | |
294 | if (l < 0) { | |
295 | ||
296 | if (errno == EAGAIN) | |
297 | return 0; | |
298 | ||
299 | log_warning("Failed to read from stream: %m"); | |
300 | return -errno; | |
301 | } | |
302 | ||
303 | if (l == 0) { | |
304 | r = stdout_stream_scan(s, true); | |
305 | if (r < 0) | |
306 | return r; | |
307 | ||
308 | return 0; | |
309 | } | |
310 | ||
311 | s->length += l; | |
312 | r = stdout_stream_scan(s, false); | |
313 | if (r < 0) | |
314 | return r; | |
315 | ||
316 | return 1; | |
317 | ||
318 | } | |
319 | ||
320 | void stdout_stream_free(StdoutStream *s) { | |
321 | assert(s); | |
322 | ||
323 | if (s->server) { | |
324 | assert(s->server->n_stdout_streams > 0); | |
325 | s->server->n_stdout_streams --; | |
326 | LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s); | |
327 | } | |
328 | ||
329 | if (s->fd >= 0) { | |
330 | if (s->server) | |
331 | epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL); | |
332 | ||
333 | close_nointr_nofail(s->fd); | |
334 | } | |
335 | ||
336 | #ifdef HAVE_SELINUX | |
337 | if (s->security_context) | |
338 | freecon(s->security_context); | |
339 | #endif | |
340 | ||
341 | free(s->identifier); | |
342 | free(s); | |
343 | } | |
344 | ||
345 | int stdout_stream_new(Server *s) { | |
346 | StdoutStream *stream; | |
347 | int fd, r; | |
348 | socklen_t len; | |
349 | struct epoll_event ev; | |
350 | ||
351 | assert(s); | |
352 | ||
353 | fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); | |
354 | if (fd < 0) { | |
355 | if (errno == EAGAIN) | |
356 | return 0; | |
357 | ||
358 | log_error("Failed to accept stdout connection: %m"); | |
359 | return -errno; | |
360 | } | |
361 | ||
362 | if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) { | |
363 | log_warning("Too many stdout streams, refusing connection."); | |
364 | close_nointr_nofail(fd); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | stream = new0(StdoutStream, 1); | |
369 | if (!stream) { | |
370 | close_nointr_nofail(fd); | |
371 | return log_oom(); | |
372 | } | |
373 | ||
374 | stream->fd = fd; | |
375 | ||
376 | len = sizeof(stream->ucred); | |
377 | if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) { | |
378 | log_error("Failed to determine peer credentials: %m"); | |
379 | r = -errno; | |
380 | goto fail; | |
381 | } | |
382 | ||
383 | #ifdef HAVE_SELINUX | |
384 | if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT) | |
385 | log_error("Failed to determine peer security context: %m"); | |
386 | #endif | |
387 | ||
388 | if (shutdown(fd, SHUT_WR) < 0) { | |
389 | log_error("Failed to shutdown writing side of socket: %m"); | |
390 | r = -errno; | |
391 | goto fail; | |
392 | } | |
393 | ||
394 | zero(ev); | |
395 | ev.data.ptr = stream; | |
396 | ev.events = EPOLLIN; | |
397 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) { | |
398 | log_error("Failed to add stream to event loop: %m"); | |
399 | r = -errno; | |
400 | goto fail; | |
401 | } | |
402 | ||
403 | stream->server = s; | |
404 | LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream); | |
405 | s->n_stdout_streams ++; | |
406 | ||
407 | return 0; | |
408 | ||
409 | fail: | |
410 | stdout_stream_free(stream); | |
411 | return r; | |
412 | } | |
413 | ||
414 | int server_open_stdout_socket(Server *s) { | |
a45b9fca LP |
415 | int r; |
416 | struct epoll_event ev; | |
417 | ||
418 | assert(s); | |
419 | ||
420 | if (s->stdout_fd < 0) { | |
b92bea5d ZJS |
421 | union sockaddr_union sa = { |
422 | .un.sun_family = AF_UNIX, | |
423 | .un.sun_path = "/run/systemd/journal/stdout", | |
424 | }; | |
a45b9fca LP |
425 | |
426 | s->stdout_fd = socket(AF_UNIX, SOCK_STREAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0); | |
427 | if (s->stdout_fd < 0) { | |
428 | log_error("socket() failed: %m"); | |
429 | return -errno; | |
430 | } | |
431 | ||
a45b9fca LP |
432 | unlink(sa.un.sun_path); |
433 | ||
434 | r = bind(s->stdout_fd, &sa.sa, offsetof(union sockaddr_union, un.sun_path) + strlen(sa.un.sun_path)); | |
435 | if (r < 0) { | |
436 | log_error("bind() failed: %m"); | |
437 | return -errno; | |
438 | } | |
439 | ||
440 | chmod(sa.un.sun_path, 0666); | |
441 | ||
442 | if (listen(s->stdout_fd, SOMAXCONN) < 0) { | |
443 | log_error("liste() failed: %m"); | |
444 | return -errno; | |
445 | } | |
446 | } else | |
447 | fd_nonblock(s->stdout_fd, 1); | |
448 | ||
449 | zero(ev); | |
450 | ev.events = EPOLLIN; | |
451 | ev.data.fd = s->stdout_fd; | |
452 | if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, s->stdout_fd, &ev) < 0) { | |
453 | log_error("Failed to add stdout server fd to epoll object: %m"); | |
454 | return -errno; | |
455 | } | |
456 | ||
457 | return 0; | |
458 | } |