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Commit | Line | Data |
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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
5899f3b7 | 2 | |
a7334b09 LP |
3 | /*** |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
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 | |
a7334b09 LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
a7334b09 | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
a7334b09 LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
5899f3b7 LP |
22 | #include <stdarg.h> |
23 | #include <stdio.h> | |
c9b97d2a | 24 | #include <errno.h> |
16801e90 LP |
25 | #include <unistd.h> |
26 | #include <fcntl.h> | |
27 | #include <sys/socket.h> | |
28 | #include <sys/un.h> | |
5ba081b0 | 29 | #include <stddef.h> |
963ddb91 | 30 | #include <printf.h> |
5899f3b7 LP |
31 | |
32 | #include "log.h" | |
16801e90 | 33 | #include "util.h" |
4db17f29 | 34 | #include "missing.h" |
16801e90 | 35 | #include "macro.h" |
5ba081b0 | 36 | #include "socket-util.h" |
5899f3b7 | 37 | |
bb99a35a LP |
38 | #define SNDBUF_SIZE (8*1024*1024) |
39 | ||
16801e90 | 40 | static LogTarget log_target = LOG_TARGET_CONSOLE; |
bbe63281 | 41 | static int log_max_level = LOG_INFO; |
3eff4208 | 42 | static int log_facility = LOG_DAEMON; |
16801e90 | 43 | |
843d2643 | 44 | static int console_fd = STDERR_FILENO; |
16801e90 LP |
45 | static int syslog_fd = -1; |
46 | static int kmsg_fd = -1; | |
5ba081b0 | 47 | static int journal_fd = -1; |
16801e90 | 48 | |
c31e1495 LP |
49 | static bool syslog_is_stream = false; |
50 | ||
bbe63281 LP |
51 | static bool show_color = false; |
52 | static bool show_location = false; | |
53 | ||
c1dc6153 LP |
54 | static bool upgrade_syslog_to_journal = false; |
55 | ||
35b8ca3a | 56 | /* Akin to glibc's __abort_msg; which is private and we hence cannot |
185986c6 LP |
57 | * use here. */ |
58 | static char *log_abort_msg = NULL; | |
59 | ||
843d2643 LP |
60 | void log_close_console(void) { |
61 | ||
62 | if (console_fd < 0) | |
63 | return; | |
16801e90 | 64 | |
c8513d54 LP |
65 | if (getpid() == 1) { |
66 | if (console_fd >= 3) | |
03e334a1 | 67 | safe_close(console_fd); |
c8513d54 | 68 | |
843d2643 | 69 | console_fd = -1; |
16801e90 LP |
70 | } |
71 | } | |
72 | ||
843d2643 | 73 | static int log_open_console(void) { |
16801e90 | 74 | |
843d2643 | 75 | if (console_fd >= 0) |
16801e90 | 76 | return 0; |
843d2643 LP |
77 | |
78 | if (getpid() == 1) { | |
5ba081b0 | 79 | console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
cd15c418 | 80 | if (console_fd < 0) |
843d2643 | 81 | return console_fd; |
843d2643 LP |
82 | } else |
83 | console_fd = STDERR_FILENO; | |
84 | ||
85 | return 0; | |
86 | } | |
87 | ||
88 | void log_close_kmsg(void) { | |
03e334a1 | 89 | kmsg_fd = safe_close(kmsg_fd); |
843d2643 LP |
90 | } |
91 | ||
92 | static int log_open_kmsg(void) { | |
16801e90 LP |
93 | |
94 | if (kmsg_fd >= 0) | |
95 | return 0; | |
96 | ||
674f8283 | 97 | kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
cd15c418 | 98 | if (kmsg_fd < 0) |
16801e90 | 99 | return -errno; |
0dae83f9 | 100 | |
16801e90 LP |
101 | return 0; |
102 | } | |
103 | ||
104 | void log_close_syslog(void) { | |
03e334a1 | 105 | syslog_fd = safe_close(syslog_fd); |
16801e90 LP |
106 | } |
107 | ||
c31e1495 | 108 | static int create_log_socket(int type) { |
8b18fdc1 | 109 | struct timeval tv; |
95066a90 | 110 | int fd; |
c31e1495 | 111 | |
8b18fdc1 | 112 | fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0); |
5ba081b0 | 113 | if (fd < 0) |
c31e1495 LP |
114 | return -errno; |
115 | ||
bb99a35a LP |
116 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
117 | ||
8b18fdc1 LP |
118 | /* We need a blocking fd here since we'd otherwise lose |
119 | messages way too early. However, let's not hang forever in the | |
120 | unlikely case of a deadlock. */ | |
4d89874a ZJS |
121 | if (getpid() == 1) |
122 | timeval_store(&tv, 10 * USEC_PER_MSEC); | |
123 | else | |
124 | timeval_store(&tv, 10 * USEC_PER_SEC); | |
086891e5 | 125 | (void) setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); |
8b18fdc1 | 126 | |
c31e1495 LP |
127 | return fd; |
128 | } | |
129 | ||
843d2643 | 130 | static int log_open_syslog(void) { |
95066a90 LP |
131 | |
132 | static const union sockaddr_union sa = { | |
b92bea5d ZJS |
133 | .un.sun_family = AF_UNIX, |
134 | .un.sun_path = "/dev/log", | |
135 | }; | |
16801e90 | 136 | |
95066a90 LP |
137 | int r; |
138 | ||
16801e90 LP |
139 | if (syslog_fd >= 0) |
140 | return 0; | |
141 | ||
5ba081b0 LP |
142 | syslog_fd = create_log_socket(SOCK_DGRAM); |
143 | if (syslog_fd < 0) { | |
144 | r = syslog_fd; | |
843d2643 | 145 | goto fail; |
16801e90 LP |
146 | } |
147 | ||
3338b959 | 148 | if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { |
03e334a1 | 149 | safe_close(syslog_fd); |
c31e1495 LP |
150 | |
151 | /* Some legacy syslog systems still use stream | |
152 | * sockets. They really shouldn't. But what can we | |
153 | * do... */ | |
5ba081b0 LP |
154 | syslog_fd = create_log_socket(SOCK_STREAM); |
155 | if (syslog_fd < 0) { | |
156 | r = syslog_fd; | |
c31e1495 LP |
157 | goto fail; |
158 | } | |
159 | ||
3338b959 | 160 | if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { |
c31e1495 LP |
161 | r = -errno; |
162 | goto fail; | |
163 | } | |
164 | ||
165 | syslog_is_stream = true; | |
166 | } else | |
167 | syslog_is_stream = false; | |
168 | ||
16801e90 | 169 | return 0; |
843d2643 LP |
170 | |
171 | fail: | |
172 | log_close_syslog(); | |
843d2643 LP |
173 | return r; |
174 | } | |
175 | ||
5ba081b0 | 176 | void log_close_journal(void) { |
03e334a1 | 177 | journal_fd = safe_close(journal_fd); |
5ba081b0 LP |
178 | } |
179 | ||
180 | static int log_open_journal(void) { | |
95066a90 LP |
181 | |
182 | static const union sockaddr_union sa = { | |
b92bea5d ZJS |
183 | .un.sun_family = AF_UNIX, |
184 | .un.sun_path = "/run/systemd/journal/socket", | |
185 | }; | |
95066a90 | 186 | |
5ba081b0 LP |
187 | int r; |
188 | ||
189 | if (journal_fd >= 0) | |
190 | return 0; | |
191 | ||
192 | journal_fd = create_log_socket(SOCK_DGRAM); | |
193 | if (journal_fd < 0) { | |
194 | r = journal_fd; | |
195 | goto fail; | |
196 | } | |
197 | ||
5ba081b0 LP |
198 | if (connect(journal_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { |
199 | r = -errno; | |
200 | goto fail; | |
201 | } | |
202 | ||
5ba081b0 LP |
203 | return 0; |
204 | ||
205 | fail: | |
206 | log_close_journal(); | |
5ba081b0 LP |
207 | return r; |
208 | } | |
209 | ||
843d2643 LP |
210 | int log_open(void) { |
211 | int r; | |
212 | ||
213 | /* If we don't use the console we close it here, to not get | |
214 | * killed by SAK. If we don't use syslog we close it here so | |
215 | * that we are not confused by somebody deleting the socket in | |
216 | * the fs. If we don't use /dev/kmsg we still keep it open, | |
217 | * because there is no reason to close it. */ | |
218 | ||
9fae33d2 | 219 | if (log_target == LOG_TARGET_NULL) { |
5ba081b0 | 220 | log_close_journal(); |
9fae33d2 LP |
221 | log_close_syslog(); |
222 | log_close_console(); | |
223 | return 0; | |
224 | } | |
225 | ||
a6903061 | 226 | if ((log_target != LOG_TARGET_AUTO && log_target != LOG_TARGET_SAFE) || |
bb7df0da | 227 | getpid() == 1 || |
f41c094c | 228 | isatty(STDERR_FILENO) <= 0) { |
bb7df0da LP |
229 | |
230 | if (log_target == LOG_TARGET_AUTO || | |
5ba081b0 LP |
231 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
232 | log_target == LOG_TARGET_JOURNAL) { | |
233 | r = log_open_journal(); | |
234 | if (r >= 0) { | |
235 | log_close_syslog(); | |
bb7df0da LP |
236 | log_close_console(); |
237 | return r; | |
238 | } | |
5ba081b0 LP |
239 | } |
240 | ||
241 | if (log_target == LOG_TARGET_SYSLOG_OR_KMSG || | |
242 | log_target == LOG_TARGET_SYSLOG) { | |
243 | r = log_open_syslog(); | |
244 | if (r >= 0) { | |
245 | log_close_journal(); | |
246 | log_close_console(); | |
247 | return r; | |
248 | } | |
249 | } | |
250 | ||
bb7df0da | 251 | if (log_target == LOG_TARGET_AUTO || |
a6903061 | 252 | log_target == LOG_TARGET_SAFE || |
5ba081b0 | 253 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
bb7df0da | 254 | log_target == LOG_TARGET_SYSLOG_OR_KMSG || |
5ba081b0 LP |
255 | log_target == LOG_TARGET_KMSG) { |
256 | r = log_open_kmsg(); | |
257 | if (r >= 0) { | |
258 | log_close_journal(); | |
bb7df0da LP |
259 | log_close_syslog(); |
260 | log_close_console(); | |
261 | return r; | |
262 | } | |
5ba081b0 | 263 | } |
bb7df0da | 264 | } |
843d2643 | 265 | |
5ba081b0 | 266 | log_close_journal(); |
843d2643 | 267 | log_close_syslog(); |
dcdf86bb | 268 | |
843d2643 | 269 | return log_open_console(); |
16801e90 LP |
270 | } |
271 | ||
272 | void log_set_target(LogTarget target) { | |
273 | assert(target >= 0); | |
274 | assert(target < _LOG_TARGET_MAX); | |
275 | ||
c1dc6153 LP |
276 | if (upgrade_syslog_to_journal) { |
277 | if (target == LOG_TARGET_SYSLOG) | |
278 | target = LOG_TARGET_JOURNAL; | |
279 | else if (target == LOG_TARGET_SYSLOG_OR_KMSG) | |
280 | target = LOG_TARGET_JOURNAL_OR_KMSG; | |
281 | } | |
282 | ||
16801e90 LP |
283 | log_target = target; |
284 | } | |
285 | ||
871e5809 | 286 | void log_close(void) { |
5ba081b0 | 287 | log_close_journal(); |
871e5809 | 288 | log_close_syslog(); |
5ba081b0 LP |
289 | log_close_kmsg(); |
290 | log_close_console(); | |
871e5809 LP |
291 | } |
292 | ||
4d8a7798 | 293 | void log_forget_fds(void) { |
5ba081b0 | 294 | console_fd = kmsg_fd = syslog_fd = journal_fd = -1; |
4d8a7798 MS |
295 | } |
296 | ||
16801e90 LP |
297 | void log_set_max_level(int level) { |
298 | assert((level & LOG_PRIMASK) == level); | |
299 | ||
300 | log_max_level = level; | |
301 | } | |
302 | ||
3eff4208 LP |
303 | void log_set_facility(int facility) { |
304 | log_facility = facility; | |
305 | } | |
306 | ||
843d2643 | 307 | static int write_to_console( |
20c03b7b | 308 | int level, |
086891e5 | 309 | int error, |
95066a90 | 310 | const char *file, |
20c03b7b LP |
311 | int line, |
312 | const char *func, | |
086891e5 | 313 | const char *object_field, |
fdf9f9bb | 314 | const char *object, |
20c03b7b | 315 | const char *buffer) { |
5899f3b7 | 316 | |
aca83a53 LP |
317 | char location[64], prefix[1 + DECIMAL_STR_MAX(int) + 2]; |
318 | struct iovec iovec[6] = {}; | |
843d2643 LP |
319 | unsigned n = 0; |
320 | bool highlight; | |
5899f3b7 | 321 | |
843d2643 LP |
322 | if (console_fd < 0) |
323 | return 0; | |
324 | ||
aca83a53 LP |
325 | if (log_target == LOG_TARGET_CONSOLE_PREFIXED) { |
326 | sprintf(prefix, "<%i>", level); | |
327 | IOVEC_SET_STRING(iovec[n++], prefix); | |
328 | } | |
329 | ||
bbe63281 | 330 | highlight = LOG_PRI(level) <= LOG_ERR && show_color; |
843d2643 | 331 | |
674f8283 LP |
332 | if (show_location) { |
333 | snprintf(location, sizeof(location), "(%s:%u) ", file, line); | |
334 | char_array_0(location); | |
bbe63281 | 335 | IOVEC_SET_STRING(iovec[n++], location); |
674f8283 LP |
336 | } |
337 | ||
843d2643 | 338 | if (highlight) |
c1072ea0 | 339 | IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED_ON); |
843d2643 LP |
340 | IOVEC_SET_STRING(iovec[n++], buffer); |
341 | if (highlight) | |
61cbdc4b | 342 | IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_OFF); |
843d2643 LP |
343 | IOVEC_SET_STRING(iovec[n++], "\n"); |
344 | ||
0e6eaa2d LP |
345 | if (writev(console_fd, iovec, n) < 0) { |
346 | ||
347 | if (errno == EIO && getpid() == 1) { | |
348 | ||
349 | /* If somebody tried to kick us from our | |
350 | * console tty (via vhangup() or suchlike), | |
351 | * try to reconnect */ | |
352 | ||
353 | log_close_console(); | |
354 | log_open_console(); | |
355 | ||
356 | if (console_fd < 0) | |
357 | return 0; | |
358 | ||
359 | if (writev(console_fd, iovec, n) < 0) | |
360 | return -errno; | |
361 | } else | |
362 | return -errno; | |
363 | } | |
5899f3b7 | 364 | |
843d2643 | 365 | return 1; |
16801e90 | 366 | } |
5899f3b7 | 367 | |
16801e90 | 368 | static int write_to_syslog( |
086891e5 LP |
369 | int level, |
370 | int error, | |
95066a90 | 371 | const char *file, |
086891e5 LP |
372 | int line, |
373 | const char *func, | |
374 | const char *object_field, | |
375 | const char *object, | |
376 | const char *buffer) { | |
16801e90 | 377 | |
e09ca588 | 378 | char header_priority[1 + DECIMAL_STR_MAX(int) + 2], header_time[64], header_pid[1 + DECIMAL_STR_MAX(pid_t) + 4]; |
b92bea5d ZJS |
379 | struct iovec iovec[5] = {}; |
380 | struct msghdr msghdr = { | |
381 | .msg_iov = iovec, | |
382 | .msg_iovlen = ELEMENTSOF(iovec), | |
383 | }; | |
16801e90 LP |
384 | time_t t; |
385 | struct tm *tm; | |
386 | ||
387 | if (syslog_fd < 0) | |
843d2643 | 388 | return 0; |
16801e90 | 389 | |
29db5834 | 390 | snprintf(header_priority, sizeof(header_priority), "<%i>", level); |
16801e90 LP |
391 | char_array_0(header_priority); |
392 | ||
393 | t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC); | |
fdf9f9bb ZJS |
394 | tm = localtime(&t); |
395 | if (!tm) | |
16801e90 LP |
396 | return -EINVAL; |
397 | ||
398 | if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0) | |
399 | return -EINVAL; | |
400 | ||
de0671ee | 401 | snprintf(header_pid, sizeof(header_pid), "["PID_FMT"]: ", getpid()); |
16801e90 LP |
402 | char_array_0(header_pid); |
403 | ||
16801e90 LP |
404 | IOVEC_SET_STRING(iovec[0], header_priority); |
405 | IOVEC_SET_STRING(iovec[1], header_time); | |
5b6319dc | 406 | IOVEC_SET_STRING(iovec[2], program_invocation_short_name); |
16801e90 LP |
407 | IOVEC_SET_STRING(iovec[3], header_pid); |
408 | IOVEC_SET_STRING(iovec[4], buffer); | |
409 | ||
c899f8c6 | 410 | /* When using syslog via SOCK_STREAM separate the messages by NUL chars */ |
c31e1495 LP |
411 | if (syslog_is_stream) |
412 | iovec[4].iov_len++; | |
413 | ||
c31e1495 LP |
414 | for (;;) { |
415 | ssize_t n; | |
416 | ||
8f7f7a1b MS |
417 | n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL); |
418 | if (n < 0) | |
c31e1495 LP |
419 | return -errno; |
420 | ||
421 | if (!syslog_is_stream || | |
422 | (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec))) | |
423 | break; | |
424 | ||
425 | IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n); | |
426 | } | |
16801e90 | 427 | |
843d2643 | 428 | return 1; |
16801e90 LP |
429 | } |
430 | ||
431 | static int write_to_kmsg( | |
086891e5 LP |
432 | int level, |
433 | int error, | |
434 | const char*file, | |
435 | int line, | |
436 | const char *func, | |
437 | const char *object_field, | |
438 | const char *object, | |
439 | const char *buffer) { | |
16801e90 | 440 | |
e09ca588 | 441 | char header_priority[1 + DECIMAL_STR_MAX(int) + 2], header_pid[1 + DECIMAL_STR_MAX(pid_t) + 4]; |
b92bea5d | 442 | struct iovec iovec[5] = {}; |
16801e90 LP |
443 | |
444 | if (kmsg_fd < 0) | |
843d2643 | 445 | return 0; |
16801e90 | 446 | |
29db5834 | 447 | snprintf(header_priority, sizeof(header_priority), "<%i>", level); |
16801e90 LP |
448 | char_array_0(header_priority); |
449 | ||
de0671ee | 450 | snprintf(header_pid, sizeof(header_pid), "["PID_FMT"]: ", getpid()); |
16801e90 LP |
451 | char_array_0(header_pid); |
452 | ||
16801e90 | 453 | IOVEC_SET_STRING(iovec[0], header_priority); |
5b6319dc | 454 | IOVEC_SET_STRING(iovec[1], program_invocation_short_name); |
16801e90 LP |
455 | IOVEC_SET_STRING(iovec[2], header_pid); |
456 | IOVEC_SET_STRING(iovec[3], buffer); | |
843d2643 | 457 | IOVEC_SET_STRING(iovec[4], "\n"); |
16801e90 LP |
458 | |
459 | if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0) | |
460 | return -errno; | |
461 | ||
843d2643 | 462 | return 1; |
16801e90 LP |
463 | } |
464 | ||
086891e5 LP |
465 | static int log_do_header( |
466 | char *header, | |
467 | size_t size, | |
468 | int level, | |
469 | int error, | |
470 | const char *file, int line, const char *func, | |
471 | const char *object_field, const char *object) { | |
472 | ||
41a79f10 | 473 | snprintf(header, size, |
5ba081b0 | 474 | "PRIORITY=%i\n" |
3eff4208 | 475 | "SYSLOG_FACILITY=%i\n" |
086891e5 | 476 | "%s%s%s" |
e429981b | 477 | "%s%.*i%s" |
086891e5 LP |
478 | "%s%s%s" |
479 | "%s%.*i%s" | |
480 | "%s%s%s" | |
41a79f10 | 481 | "SYSLOG_IDENTIFIER=%s\n", |
5ba081b0 | 482 | LOG_PRI(level), |
3eff4208 | 483 | LOG_FAC(level), |
086891e5 LP |
484 | isempty(file) ? "" : "CODE_FILE=", |
485 | isempty(file) ? "" : file, | |
486 | isempty(file) ? "" : "\n", | |
e429981b ZJS |
487 | line ? "CODE_LINE=" : "", |
488 | line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */ | |
489 | line ? "\n" : "", | |
086891e5 LP |
490 | isempty(func) ? "" : "CODE_FUNCTION=", |
491 | isempty(func) ? "" : func, | |
492 | isempty(func) ? "" : "\n", | |
493 | error ? "ERRNO=" : "", | |
494 | error ? 1 : 0, error, | |
495 | error ? "\n" : "", | |
496 | isempty(object) ? "" : object_field, | |
497 | isempty(object) ? "" : object, | |
498 | isempty(object) ? "" : "\n", | |
d29b05a4 | 499 | program_invocation_short_name); |
41a79f10 | 500 | header[size - 1] = '\0'; |
086891e5 | 501 | |
41a79f10 ZJS |
502 | return 0; |
503 | } | |
5ba081b0 | 504 | |
41a79f10 | 505 | static int write_to_journal( |
086891e5 LP |
506 | int level, |
507 | int error, | |
508 | const char*file, | |
509 | int line, | |
510 | const char *func, | |
511 | const char *object_field, | |
512 | const char *object, | |
513 | const char *buffer) { | |
41a79f10 ZJS |
514 | |
515 | char header[LINE_MAX]; | |
b92bea5d ZJS |
516 | struct iovec iovec[4] = {}; |
517 | struct msghdr mh = {}; | |
41a79f10 ZJS |
518 | |
519 | if (journal_fd < 0) | |
520 | return 0; | |
521 | ||
086891e5 | 522 | log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object); |
5ba081b0 | 523 | |
5ba081b0 | 524 | IOVEC_SET_STRING(iovec[0], header); |
41a79f10 ZJS |
525 | IOVEC_SET_STRING(iovec[1], "MESSAGE="); |
526 | IOVEC_SET_STRING(iovec[2], buffer); | |
527 | IOVEC_SET_STRING(iovec[3], "\n"); | |
5ba081b0 | 528 | |
5ba081b0 LP |
529 | mh.msg_iov = iovec; |
530 | mh.msg_iovlen = ELEMENTSOF(iovec); | |
531 | ||
532 | if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0) | |
533 | return -errno; | |
534 | ||
535 | return 1; | |
536 | } | |
537 | ||
843d2643 | 538 | static int log_dispatch( |
086891e5 LP |
539 | int level, |
540 | int error, | |
95066a90 | 541 | const char *file, |
086891e5 LP |
542 | int line, |
543 | const char *func, | |
544 | const char *object_field, | |
545 | const char *object, | |
546 | char *buffer) { | |
843d2643 | 547 | |
bf371116 | 548 | assert(buffer); |
843d2643 | 549 | |
9fae33d2 | 550 | if (log_target == LOG_TARGET_NULL) |
bf371116 | 551 | return -error; |
9fae33d2 | 552 | |
29db5834 | 553 | /* Patch in LOG_DAEMON facility if necessary */ |
7d76f312 | 554 | if ((level & LOG_FACMASK) == 0) |
3eff4208 | 555 | level = log_facility | LOG_PRI(level); |
29db5834 | 556 | |
8f16f51d LP |
557 | if (error < 0) |
558 | error = -error; | |
559 | ||
9726b29e LP |
560 | do { |
561 | char *e; | |
9499b235 | 562 | int k = 0; |
843d2643 | 563 | |
9726b29e | 564 | buffer += strspn(buffer, NEWLINE); |
843d2643 | 565 | |
9726b29e LP |
566 | if (buffer[0] == 0) |
567 | break; | |
843d2643 | 568 | |
9726b29e LP |
569 | if ((e = strpbrk(buffer, NEWLINE))) |
570 | *(e++) = 0; | |
843d2643 | 571 | |
bb7df0da | 572 | if (log_target == LOG_TARGET_AUTO || |
5ba081b0 LP |
573 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
574 | log_target == LOG_TARGET_JOURNAL) { | |
575 | ||
086891e5 | 576 | k = write_to_journal(level, error, file, line, func, object_field, object, buffer); |
4e7bc3f3 LP |
577 | if (k < 0) { |
578 | if (k != -EAGAIN) | |
5ba081b0 LP |
579 | log_close_journal(); |
580 | log_open_kmsg(); | |
bf371116 | 581 | } |
5ba081b0 LP |
582 | } |
583 | ||
584 | if (log_target == LOG_TARGET_SYSLOG_OR_KMSG || | |
9726b29e LP |
585 | log_target == LOG_TARGET_SYSLOG) { |
586 | ||
086891e5 | 587 | k = write_to_syslog(level, error, file, line, func, object_field, object, buffer); |
4e7bc3f3 LP |
588 | if (k < 0) { |
589 | if (k != -EAGAIN) | |
8f7f7a1b | 590 | log_close_syslog(); |
9726b29e | 591 | log_open_kmsg(); |
bf371116 | 592 | } |
9726b29e LP |
593 | } |
594 | ||
9499b235 | 595 | if (k <= 0 && |
bb7df0da | 596 | (log_target == LOG_TARGET_AUTO || |
a6903061 | 597 | log_target == LOG_TARGET_SAFE || |
bb7df0da | 598 | log_target == LOG_TARGET_SYSLOG_OR_KMSG || |
678d485a | 599 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
9499b235 | 600 | log_target == LOG_TARGET_KMSG)) { |
9726b29e | 601 | |
086891e5 | 602 | k = write_to_kmsg(level, error, file, line, func, object_field, object, buffer); |
4e7bc3f3 LP |
603 | if (k < 0) { |
604 | log_close_kmsg(); | |
9726b29e | 605 | log_open_console(); |
bf371116 | 606 | } |
9726b29e LP |
607 | } |
608 | ||
bf371116 LP |
609 | if (k <= 0) |
610 | (void) write_to_console(level, error, file, line, func, object_field, object, buffer); | |
9726b29e LP |
611 | |
612 | buffer = e; | |
613 | } while (buffer); | |
614 | ||
bf371116 | 615 | return -error; |
843d2643 LP |
616 | } |
617 | ||
2149e37c LP |
618 | int log_dump_internal( |
619 | int level, | |
086891e5 | 620 | int error, |
bf371116 | 621 | const char *file, |
2149e37c LP |
622 | int line, |
623 | const char *func, | |
624 | char *buffer) { | |
625 | ||
5c0aa72a | 626 | PROTECT_ERRNO; |
2149e37c LP |
627 | |
628 | /* This modifies the buffer... */ | |
629 | ||
bf371116 LP |
630 | if (error < 0) |
631 | error = -error; | |
632 | ||
2149e37c | 633 | if (_likely_(LOG_PRI(level) > log_max_level)) |
bf371116 | 634 | return -error; |
2149e37c | 635 | |
086891e5 | 636 | return log_dispatch(level, error, file, line, func, NULL, NULL, buffer); |
2149e37c LP |
637 | } |
638 | ||
79008bdd | 639 | int log_internalv( |
086891e5 LP |
640 | int level, |
641 | int error, | |
642 | const char*file, | |
643 | int line, | |
644 | const char *func, | |
645 | const char *format, | |
646 | va_list ap) { | |
16801e90 | 647 | |
5c0aa72a | 648 | PROTECT_ERRNO; |
addab137 | 649 | char buffer[LINE_MAX]; |
16801e90 | 650 | |
bf371116 LP |
651 | if (error < 0) |
652 | error = -error; | |
653 | ||
93a46b0b | 654 | if (_likely_(LOG_PRI(level) > log_max_level)) |
bf371116 | 655 | return -error; |
16801e90 | 656 | |
086891e5 LP |
657 | /* Make sure that %m maps to the specified error */ |
658 | if (error != 0) | |
bf371116 | 659 | errno = error; |
086891e5 | 660 | |
843d2643 | 661 | vsnprintf(buffer, sizeof(buffer), format, ap); |
843d2643 LP |
662 | char_array_0(buffer); |
663 | ||
086891e5 | 664 | return log_dispatch(level, error, file, line, func, NULL, NULL, buffer); |
185986c6 | 665 | } |
16801e90 | 666 | |
79008bdd | 667 | int log_internal( |
086891e5 LP |
668 | int level, |
669 | int error, | |
670 | const char*file, | |
671 | int line, | |
672 | const char *func, | |
673 | const char *format, ...) { | |
17a94911 | 674 | |
17a94911 | 675 | va_list ap; |
bf371116 | 676 | int r; |
17a94911 LP |
677 | |
678 | va_start(ap, format); | |
79008bdd | 679 | r = log_internalv(level, error, file, line, func, format, ap); |
17a94911 LP |
680 | va_end(ap); |
681 | ||
682 | return r; | |
683 | } | |
684 | ||
79008bdd | 685 | int log_object_internalv( |
086891e5 LP |
686 | int level, |
687 | int error, | |
688 | const char*file, | |
689 | int line, | |
690 | const char *func, | |
691 | const char *object_field, | |
692 | const char *object, | |
693 | const char *format, | |
694 | va_list ap) { | |
fdf9f9bb | 695 | |
5c0aa72a | 696 | PROTECT_ERRNO; |
fdf9f9bb | 697 | char buffer[LINE_MAX]; |
fdf9f9bb | 698 | |
bf371116 LP |
699 | if (error < 0) |
700 | error = -error; | |
701 | ||
fdf9f9bb | 702 | if (_likely_(LOG_PRI(level) > log_max_level)) |
bf371116 | 703 | return -error; |
fdf9f9bb | 704 | |
086891e5 LP |
705 | /* Make sure that %m maps to the specified error */ |
706 | if (error != 0) | |
bf371116 | 707 | errno = error; |
086891e5 | 708 | |
fdf9f9bb ZJS |
709 | vsnprintf(buffer, sizeof(buffer), format, ap); |
710 | char_array_0(buffer); | |
711 | ||
086891e5 | 712 | return log_dispatch(level, error, file, line, func, object_field, object, buffer); |
fdf9f9bb ZJS |
713 | } |
714 | ||
79008bdd | 715 | int log_object_internal( |
086891e5 LP |
716 | int level, |
717 | int error, | |
718 | const char*file, | |
719 | int line, | |
720 | const char *func, | |
721 | const char *object_field, | |
722 | const char *object, | |
723 | const char *format, ...) { | |
fdf9f9bb | 724 | |
fdf9f9bb | 725 | va_list ap; |
bf371116 | 726 | int r; |
fdf9f9bb ZJS |
727 | |
728 | va_start(ap, format); | |
79008bdd | 729 | r = log_object_internalv(level, error, file, line, func, object_field, object, format, ap); |
fdf9f9bb ZJS |
730 | va_end(ap); |
731 | ||
732 | return r; | |
733 | } | |
734 | ||
086891e5 LP |
735 | static void log_assert( |
736 | int level, | |
737 | const char *text, | |
738 | const char *file, | |
739 | int line, | |
740 | const char *func, | |
741 | const char *format) { | |
742 | ||
addab137 | 743 | static char buffer[LINE_MAX]; |
185986c6 | 744 | |
50f72bca ZJS |
745 | if (_likely_(LOG_PRI(level) > log_max_level)) |
746 | return; | |
747 | ||
bcfce235 | 748 | DISABLE_WARNING_FORMAT_NONLITERAL; |
b7f33638 | 749 | snprintf(buffer, sizeof(buffer), format, text, file, line, func); |
bcfce235 | 750 | REENABLE_WARNING; |
185986c6 LP |
751 | |
752 | char_array_0(buffer); | |
753 | log_abort_msg = buffer; | |
754 | ||
086891e5 | 755 | log_dispatch(level, 0, file, line, func, NULL, NULL, buffer); |
5899f3b7 | 756 | } |
34f0e866 | 757 | |
919ce0b7 | 758 | noreturn void log_assert_failed(const char *text, const char *file, int line, const char *func) { |
80514f9c LP |
759 | log_assert(LOG_CRIT, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Aborting."); |
760 | abort(); | |
b7f33638 MS |
761 | } |
762 | ||
919ce0b7 | 763 | noreturn void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func) { |
80514f9c LP |
764 | log_assert(LOG_CRIT, text, file, line, func, "Code should not be reached '%s' at %s:%u, function %s(). Aborting."); |
765 | abort(); | |
766 | } | |
767 | ||
768 | void log_assert_failed_return(const char *text, const char *file, int line, const char *func) { | |
e5ca092c | 769 | PROTECT_ERRNO; |
80514f9c | 770 | log_assert(LOG_DEBUG, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Ignoring."); |
b7f33638 MS |
771 | } |
772 | ||
877d54e9 | 773 | int log_oom_internal(const char *file, int line, const char *func) { |
79008bdd | 774 | log_internal(LOG_ERR, ENOMEM, file, line, func, "Out of memory."); |
6dc1e7e0 MS |
775 | return -ENOMEM; |
776 | } | |
777 | ||
877d54e9 LP |
778 | int log_struct_internal( |
779 | int level, | |
086891e5 | 780 | int error, |
877d54e9 LP |
781 | const char *file, |
782 | int line, | |
783 | const char *func, | |
784 | const char *format, ...) { | |
785 | ||
bf371116 LP |
786 | char buf[LINE_MAX]; |
787 | bool found = false; | |
5c0aa72a | 788 | PROTECT_ERRNO; |
877d54e9 | 789 | va_list ap; |
bf371116 LP |
790 | |
791 | if (error < 0) | |
792 | error = -error; | |
877d54e9 LP |
793 | |
794 | if (_likely_(LOG_PRI(level) > log_max_level)) | |
bf371116 | 795 | return -error; |
877d54e9 LP |
796 | |
797 | if (log_target == LOG_TARGET_NULL) | |
bf371116 | 798 | return -error; |
877d54e9 LP |
799 | |
800 | if ((level & LOG_FACMASK) == 0) | |
801 | level = log_facility | LOG_PRI(level); | |
802 | ||
877d54e9 LP |
803 | if ((log_target == LOG_TARGET_AUTO || |
804 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || | |
805 | log_target == LOG_TARGET_JOURNAL) && | |
806 | journal_fd >= 0) { | |
877d54e9 | 807 | char header[LINE_MAX]; |
b92bea5d | 808 | struct iovec iovec[17] = {}; |
877d54e9 | 809 | unsigned n = 0, i; |
543295ad ZJS |
810 | struct msghdr mh = { |
811 | .msg_iov = iovec, | |
812 | }; | |
41a79f10 | 813 | static const char nl = '\n'; |
bf371116 | 814 | bool fallback = false; |
877d54e9 LP |
815 | |
816 | /* If the journal is available do structured logging */ | |
086891e5 | 817 | log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL); |
877d54e9 LP |
818 | IOVEC_SET_STRING(iovec[n++], header); |
819 | ||
820 | va_start(ap, format); | |
821 | while (format && n + 1 < ELEMENTSOF(iovec)) { | |
963ddb91 | 822 | va_list aq; |
bf371116 | 823 | char *m; |
877d54e9 | 824 | |
963ddb91 LP |
825 | /* We need to copy the va_list structure, |
826 | * since vasprintf() leaves it afterwards at | |
827 | * an undefined location */ | |
828 | ||
6357ac66 LP |
829 | if (error != 0) |
830 | errno = error; | |
831 | ||
963ddb91 | 832 | va_copy(aq, ap); |
bf371116 | 833 | if (vasprintf(&m, format, aq) < 0) { |
963ddb91 | 834 | va_end(aq); |
bf371116 | 835 | fallback = true; |
877d54e9 LP |
836 | goto finish; |
837 | } | |
963ddb91 LP |
838 | va_end(aq); |
839 | ||
840 | /* Now, jump enough ahead, so that we point to | |
841 | * the next format string */ | |
842 | VA_FORMAT_ADVANCE(format, ap); | |
877d54e9 | 843 | |
bf371116 | 844 | IOVEC_SET_STRING(iovec[n++], m); |
877d54e9 LP |
845 | |
846 | iovec[n].iov_base = (char*) &nl; | |
847 | iovec[n].iov_len = 1; | |
848 | n++; | |
849 | ||
850 | format = va_arg(ap, char *); | |
851 | } | |
877d54e9 | 852 | |
877d54e9 LP |
853 | mh.msg_iovlen = n; |
854 | ||
bf371116 | 855 | (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL); |
877d54e9 LP |
856 | |
857 | finish: | |
e98055de | 858 | va_end(ap); |
877d54e9 LP |
859 | for (i = 1; i < n; i += 2) |
860 | free(iovec[i].iov_base); | |
861 | ||
bf371116 LP |
862 | if (!fallback) |
863 | return -error; | |
864 | } | |
877d54e9 | 865 | |
bf371116 | 866 | /* Fallback if journal logging is not available or didn't work. */ |
6357ac66 | 867 | |
bf371116 LP |
868 | va_start(ap, format); |
869 | while (format) { | |
870 | va_list aq; | |
877d54e9 | 871 | |
bf371116 LP |
872 | if (error != 0) |
873 | errno = error; | |
877d54e9 | 874 | |
bf371116 LP |
875 | va_copy(aq, ap); |
876 | vsnprintf(buf, sizeof(buf), format, aq); | |
877 | va_end(aq); | |
878 | char_array_0(buf); | |
963ddb91 | 879 | |
bf371116 LP |
880 | if (startswith(buf, "MESSAGE=")) { |
881 | found = true; | |
882 | break; | |
877d54e9 | 883 | } |
877d54e9 | 884 | |
bf371116 LP |
885 | VA_FORMAT_ADVANCE(format, ap); |
886 | ||
887 | format = va_arg(ap, char *); | |
877d54e9 | 888 | } |
bf371116 | 889 | va_end(ap); |
877d54e9 | 890 | |
bf371116 LP |
891 | if (!found) |
892 | return -error; | |
893 | ||
894 | return log_dispatch(level, error, file, line, func, NULL, NULL, buf + 8); | |
877d54e9 LP |
895 | } |
896 | ||
34f0e866 LP |
897 | int log_set_target_from_string(const char *e) { |
898 | LogTarget t; | |
899 | ||
5ba081b0 LP |
900 | t = log_target_from_string(e); |
901 | if (t < 0) | |
34f0e866 LP |
902 | return -EINVAL; |
903 | ||
904 | log_set_target(t); | |
905 | return 0; | |
906 | } | |
907 | ||
908 | int log_set_max_level_from_string(const char *e) { | |
909 | int t; | |
910 | ||
5ba081b0 LP |
911 | t = log_level_from_string(e); |
912 | if (t < 0) | |
913 | return t; | |
34f0e866 LP |
914 | |
915 | log_set_max_level(t); | |
916 | return 0; | |
917 | } | |
918 | ||
1de1c9c3 LP |
919 | static int parse_proc_cmdline_item(const char *key, const char *value) { |
920 | ||
921 | /* | |
922 | * The systemd.log_xyz= settings are parsed by all tools, and | |
923 | * so is "debug". | |
924 | * | |
925 | * However, "quiet" is only parsed by PID 1! | |
926 | */ | |
927 | ||
928 | if (streq(key, "debug") && !value) | |
929 | log_set_max_level(LOG_DEBUG); | |
930 | ||
931 | else if (streq(key, "systemd.log_target") && value) { | |
932 | ||
933 | if (log_set_target_from_string(value) < 0) | |
934 | log_warning("Failed to parse log target '%s'. Ignoring.", value); | |
935 | ||
936 | } else if (streq(key, "systemd.log_level") && value) { | |
937 | ||
938 | if (log_set_max_level_from_string(value) < 0) | |
939 | log_warning("Failed to parse log level '%s'. Ignoring.", value); | |
940 | ||
941 | } else if (streq(key, "systemd.log_color") && value) { | |
942 | ||
943 | if (log_show_color_from_string(value) < 0) | |
944 | log_warning("Failed to parse log color setting '%s'. Ignoring.", value); | |
945 | ||
946 | } else if (streq(key, "systemd.log_location") && value) { | |
947 | ||
948 | if (log_show_location_from_string(value) < 0) | |
949 | log_warning("Failed to parse log location setting '%s'. Ignoring.", value); | |
950 | } | |
951 | ||
952 | return 0; | |
953 | } | |
954 | ||
34f0e866 LP |
955 | void log_parse_environment(void) { |
956 | const char *e; | |
b8d0ffc2 | 957 | |
f9aa5413 | 958 | (void) parse_proc_cmdline(parse_proc_cmdline_item); |
34f0e866 | 959 | |
4db17f29 | 960 | e = secure_getenv("SYSTEMD_LOG_TARGET"); |
88fae6e0 | 961 | if (e && log_set_target_from_string(e) < 0) |
f0ea29ea | 962 | log_warning("Failed to parse log target '%s'. Ignoring.", e); |
34f0e866 | 963 | |
4db17f29 | 964 | e = secure_getenv("SYSTEMD_LOG_LEVEL"); |
88fae6e0 | 965 | if (e && log_set_max_level_from_string(e) < 0) |
f0ea29ea | 966 | log_warning("Failed to parse log level '%s'. Ignoring.", e); |
bbe63281 | 967 | |
4db17f29 | 968 | e = secure_getenv("SYSTEMD_LOG_COLOR"); |
88fae6e0 | 969 | if (e && log_show_color_from_string(e) < 0) |
f0ea29ea | 970 | log_warning("Failed to parse bool '%s'. Ignoring.", e); |
bbe63281 | 971 | |
4db17f29 | 972 | e = secure_getenv("SYSTEMD_LOG_LOCATION"); |
88fae6e0 | 973 | if (e && log_show_location_from_string(e) < 0) |
f0ea29ea | 974 | log_warning("Failed to parse bool '%s'. Ignoring.", e); |
34f0e866 LP |
975 | } |
976 | ||
1adf1049 LP |
977 | LogTarget log_get_target(void) { |
978 | return log_target; | |
979 | } | |
980 | ||
981 | int log_get_max_level(void) { | |
982 | return log_max_level; | |
983 | } | |
984 | ||
bbe63281 LP |
985 | void log_show_color(bool b) { |
986 | show_color = b; | |
987 | } | |
988 | ||
b1e90ec5 ZJS |
989 | bool log_get_show_color(void) { |
990 | return show_color; | |
991 | } | |
992 | ||
bbe63281 LP |
993 | void log_show_location(bool b) { |
994 | show_location = b; | |
995 | } | |
996 | ||
b1e90ec5 ZJS |
997 | bool log_get_show_location(void) { |
998 | return show_location; | |
999 | } | |
1000 | ||
bbe63281 LP |
1001 | int log_show_color_from_string(const char *e) { |
1002 | int t; | |
1003 | ||
5ba081b0 LP |
1004 | t = parse_boolean(e); |
1005 | if (t < 0) | |
1006 | return t; | |
bbe63281 LP |
1007 | |
1008 | log_show_color(t); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
1012 | int log_show_location_from_string(const char *e) { | |
1013 | int t; | |
1014 | ||
5ba081b0 LP |
1015 | t = parse_boolean(e); |
1016 | if (t < 0) | |
1017 | return t; | |
bbe63281 LP |
1018 | |
1019 | log_show_location(t); | |
1020 | return 0; | |
1021 | } | |
1022 | ||
81270860 | 1023 | bool log_on_console(void) { |
aca83a53 LP |
1024 | if (log_target == LOG_TARGET_CONSOLE || |
1025 | log_target == LOG_TARGET_CONSOLE_PREFIXED) | |
81270860 LP |
1026 | return true; |
1027 | ||
1028 | return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0; | |
1029 | } | |
1030 | ||
2c5859af | 1031 | static const char *const log_target_table[_LOG_TARGET_MAX] = { |
34f0e866 | 1032 | [LOG_TARGET_CONSOLE] = "console", |
aca83a53 | 1033 | [LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed", |
34f0e866 | 1034 | [LOG_TARGET_KMSG] = "kmsg", |
5ba081b0 LP |
1035 | [LOG_TARGET_JOURNAL] = "journal", |
1036 | [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg", | |
1037 | [LOG_TARGET_SYSLOG] = "syslog", | |
843d2643 | 1038 | [LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg", |
5ba081b0 | 1039 | [LOG_TARGET_AUTO] = "auto", |
a6903061 | 1040 | [LOG_TARGET_SAFE] = "safe", |
5ba081b0 | 1041 | [LOG_TARGET_NULL] = "null" |
34f0e866 LP |
1042 | }; |
1043 | ||
1044 | DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget); | |
4daf54a8 ZJS |
1045 | |
1046 | void log_received_signal(int level, const struct signalfd_siginfo *si) { | |
1047 | if (si->ssi_pid > 0) { | |
1048 | _cleanup_free_ char *p = NULL; | |
1049 | ||
1050 | get_process_comm(si->ssi_pid, &p); | |
1051 | ||
1052 | log_full(level, | |
1053 | "Received SIG%s from PID "PID_FMT" (%s).", | |
1054 | signal_to_string(si->ssi_signo), | |
1055 | si->ssi_pid, strna(p)); | |
1056 | } else | |
1057 | log_full(level, | |
1058 | "Received SIG%s.", | |
1059 | signal_to_string(si->ssi_signo)); | |
1060 | ||
1061 | } | |
c1dc6153 LP |
1062 | |
1063 | void log_set_upgrade_syslog_to_journal(bool b) { | |
1064 | upgrade_syslog_to_journal = b; | |
1065 | } |