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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 | ||
35b8ca3a | 54 | /* Akin to glibc's __abort_msg; which is private and we hence cannot |
185986c6 LP |
55 | * use here. */ |
56 | static char *log_abort_msg = NULL; | |
57 | ||
843d2643 LP |
58 | void log_close_console(void) { |
59 | ||
60 | if (console_fd < 0) | |
61 | return; | |
16801e90 | 62 | |
c8513d54 LP |
63 | if (getpid() == 1) { |
64 | if (console_fd >= 3) | |
65 | close_nointr_nofail(console_fd); | |
66 | ||
843d2643 | 67 | console_fd = -1; |
16801e90 LP |
68 | } |
69 | } | |
70 | ||
843d2643 | 71 | static int log_open_console(void) { |
16801e90 | 72 | |
843d2643 | 73 | if (console_fd >= 0) |
16801e90 | 74 | return 0; |
843d2643 LP |
75 | |
76 | if (getpid() == 1) { | |
5ba081b0 | 77 | console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
cd15c418 | 78 | if (console_fd < 0) |
843d2643 | 79 | return console_fd; |
843d2643 LP |
80 | } else |
81 | console_fd = STDERR_FILENO; | |
82 | ||
83 | return 0; | |
84 | } | |
85 | ||
86 | void log_close_kmsg(void) { | |
87 | ||
88 | if (kmsg_fd < 0) | |
89 | return; | |
90 | ||
91 | close_nointr_nofail(kmsg_fd); | |
92 | kmsg_fd = -1; | |
93 | } | |
94 | ||
95 | static int log_open_kmsg(void) { | |
16801e90 LP |
96 | |
97 | if (kmsg_fd >= 0) | |
98 | return 0; | |
99 | ||
674f8283 | 100 | kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
cd15c418 | 101 | if (kmsg_fd < 0) |
16801e90 | 102 | return -errno; |
0dae83f9 | 103 | |
16801e90 LP |
104 | return 0; |
105 | } | |
106 | ||
107 | void log_close_syslog(void) { | |
108 | ||
843d2643 LP |
109 | if (syslog_fd < 0) |
110 | return; | |
111 | ||
112 | close_nointr_nofail(syslog_fd); | |
113 | syslog_fd = -1; | |
16801e90 LP |
114 | } |
115 | ||
c31e1495 | 116 | static int create_log_socket(int type) { |
c31e1495 | 117 | int fd; |
8b18fdc1 | 118 | struct timeval tv; |
c31e1495 | 119 | |
8b18fdc1 | 120 | fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0); |
5ba081b0 | 121 | if (fd < 0) |
c31e1495 LP |
122 | return -errno; |
123 | ||
bb99a35a LP |
124 | fd_inc_sndbuf(fd, SNDBUF_SIZE); |
125 | ||
8b18fdc1 LP |
126 | /* We need a blocking fd here since we'd otherwise lose |
127 | messages way too early. However, let's not hang forever in the | |
128 | unlikely case of a deadlock. */ | |
129 | timeval_store(&tv, 1*USEC_PER_MINUTE); | |
130 | setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
131 | ||
c31e1495 LP |
132 | return fd; |
133 | } | |
134 | ||
843d2643 | 135 | static int log_open_syslog(void) { |
16801e90 | 136 | int r; |
b92bea5d ZJS |
137 | union sockaddr_union sa = { |
138 | .un.sun_family = AF_UNIX, | |
139 | .un.sun_path = "/dev/log", | |
140 | }; | |
16801e90 | 141 | |
16801e90 LP |
142 | if (syslog_fd >= 0) |
143 | return 0; | |
144 | ||
5ba081b0 LP |
145 | syslog_fd = create_log_socket(SOCK_DGRAM); |
146 | if (syslog_fd < 0) { | |
147 | r = syslog_fd; | |
843d2643 | 148 | goto fail; |
16801e90 LP |
149 | } |
150 | ||
3338b959 | 151 | if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { |
c31e1495 LP |
152 | close_nointr_nofail(syslog_fd); |
153 | ||
154 | /* Some legacy syslog systems still use stream | |
155 | * sockets. They really shouldn't. But what can we | |
156 | * do... */ | |
5ba081b0 LP |
157 | syslog_fd = create_log_socket(SOCK_STREAM); |
158 | if (syslog_fd < 0) { | |
159 | r = syslog_fd; | |
c31e1495 LP |
160 | goto fail; |
161 | } | |
162 | ||
3338b959 | 163 | if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { |
c31e1495 LP |
164 | r = -errno; |
165 | goto fail; | |
166 | } | |
167 | ||
168 | syslog_is_stream = true; | |
169 | } else | |
170 | syslog_is_stream = false; | |
171 | ||
16801e90 | 172 | return 0; |
843d2643 LP |
173 | |
174 | fail: | |
175 | log_close_syslog(); | |
843d2643 LP |
176 | return r; |
177 | } | |
178 | ||
5ba081b0 LP |
179 | void log_close_journal(void) { |
180 | ||
181 | if (journal_fd < 0) | |
182 | return; | |
183 | ||
184 | close_nointr_nofail(journal_fd); | |
185 | journal_fd = -1; | |
186 | } | |
187 | ||
188 | static int log_open_journal(void) { | |
b92bea5d ZJS |
189 | union sockaddr_union sa = { |
190 | .un.sun_family = AF_UNIX, | |
191 | .un.sun_path = "/run/systemd/journal/socket", | |
192 | }; | |
5ba081b0 LP |
193 | int r; |
194 | ||
195 | if (journal_fd >= 0) | |
196 | return 0; | |
197 | ||
198 | journal_fd = create_log_socket(SOCK_DGRAM); | |
199 | if (journal_fd < 0) { | |
200 | r = journal_fd; | |
201 | goto fail; | |
202 | } | |
203 | ||
5ba081b0 LP |
204 | if (connect(journal_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { |
205 | r = -errno; | |
206 | goto fail; | |
207 | } | |
208 | ||
5ba081b0 LP |
209 | return 0; |
210 | ||
211 | fail: | |
212 | log_close_journal(); | |
5ba081b0 LP |
213 | return r; |
214 | } | |
215 | ||
843d2643 LP |
216 | int log_open(void) { |
217 | int r; | |
218 | ||
219 | /* If we don't use the console we close it here, to not get | |
220 | * killed by SAK. If we don't use syslog we close it here so | |
221 | * that we are not confused by somebody deleting the socket in | |
222 | * the fs. If we don't use /dev/kmsg we still keep it open, | |
223 | * because there is no reason to close it. */ | |
224 | ||
9fae33d2 | 225 | if (log_target == LOG_TARGET_NULL) { |
5ba081b0 | 226 | log_close_journal(); |
9fae33d2 LP |
227 | log_close_syslog(); |
228 | log_close_console(); | |
229 | return 0; | |
230 | } | |
231 | ||
a6903061 | 232 | if ((log_target != LOG_TARGET_AUTO && log_target != LOG_TARGET_SAFE) || |
bb7df0da | 233 | getpid() == 1 || |
f41c094c | 234 | isatty(STDERR_FILENO) <= 0) { |
bb7df0da LP |
235 | |
236 | if (log_target == LOG_TARGET_AUTO || | |
5ba081b0 LP |
237 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
238 | log_target == LOG_TARGET_JOURNAL) { | |
239 | r = log_open_journal(); | |
240 | if (r >= 0) { | |
241 | log_close_syslog(); | |
bb7df0da LP |
242 | log_close_console(); |
243 | return r; | |
244 | } | |
5ba081b0 LP |
245 | } |
246 | ||
247 | if (log_target == LOG_TARGET_SYSLOG_OR_KMSG || | |
248 | log_target == LOG_TARGET_SYSLOG) { | |
249 | r = log_open_syslog(); | |
250 | if (r >= 0) { | |
251 | log_close_journal(); | |
252 | log_close_console(); | |
253 | return r; | |
254 | } | |
255 | } | |
256 | ||
bb7df0da | 257 | if (log_target == LOG_TARGET_AUTO || |
a6903061 | 258 | log_target == LOG_TARGET_SAFE || |
5ba081b0 | 259 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
bb7df0da | 260 | log_target == LOG_TARGET_SYSLOG_OR_KMSG || |
5ba081b0 LP |
261 | log_target == LOG_TARGET_KMSG) { |
262 | r = log_open_kmsg(); | |
263 | if (r >= 0) { | |
264 | log_close_journal(); | |
bb7df0da LP |
265 | log_close_syslog(); |
266 | log_close_console(); | |
267 | return r; | |
268 | } | |
5ba081b0 | 269 | } |
bb7df0da | 270 | } |
843d2643 | 271 | |
5ba081b0 | 272 | log_close_journal(); |
843d2643 | 273 | log_close_syslog(); |
dcdf86bb LP |
274 | |
275 | /* Get the real /dev/console if we are PID=1, hence reopen */ | |
276 | log_close_console(); | |
843d2643 | 277 | return log_open_console(); |
16801e90 LP |
278 | } |
279 | ||
280 | void log_set_target(LogTarget target) { | |
281 | assert(target >= 0); | |
282 | assert(target < _LOG_TARGET_MAX); | |
283 | ||
284 | log_target = target; | |
285 | } | |
286 | ||
871e5809 | 287 | void log_close(void) { |
5ba081b0 | 288 | log_close_journal(); |
871e5809 | 289 | log_close_syslog(); |
5ba081b0 LP |
290 | log_close_kmsg(); |
291 | log_close_console(); | |
871e5809 LP |
292 | } |
293 | ||
4d8a7798 | 294 | void log_forget_fds(void) { |
5ba081b0 | 295 | console_fd = kmsg_fd = syslog_fd = journal_fd = -1; |
4d8a7798 MS |
296 | } |
297 | ||
16801e90 LP |
298 | void log_set_max_level(int level) { |
299 | assert((level & LOG_PRIMASK) == level); | |
300 | ||
301 | log_max_level = level; | |
302 | } | |
303 | ||
3eff4208 LP |
304 | void log_set_facility(int facility) { |
305 | log_facility = facility; | |
306 | } | |
307 | ||
843d2643 | 308 | static int write_to_console( |
20c03b7b LP |
309 | int level, |
310 | const char*file, | |
311 | int line, | |
312 | const char *func, | |
fdf9f9bb ZJS |
313 | const char *object_name, |
314 | const char *object, | |
20c03b7b | 315 | const char *buffer) { |
5899f3b7 | 316 | |
843d2643 | 317 | char location[64]; |
b92bea5d | 318 | struct iovec iovec[5] = {}; |
843d2643 LP |
319 | unsigned n = 0; |
320 | bool highlight; | |
5899f3b7 | 321 | |
843d2643 LP |
322 | if (console_fd < 0) |
323 | return 0; | |
324 | ||
bbe63281 | 325 | highlight = LOG_PRI(level) <= LOG_ERR && show_color; |
843d2643 | 326 | |
674f8283 LP |
327 | if (show_location) { |
328 | snprintf(location, sizeof(location), "(%s:%u) ", file, line); | |
329 | char_array_0(location); | |
bbe63281 | 330 | IOVEC_SET_STRING(iovec[n++], location); |
674f8283 LP |
331 | } |
332 | ||
843d2643 | 333 | if (highlight) |
c1072ea0 | 334 | IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED_ON); |
843d2643 LP |
335 | IOVEC_SET_STRING(iovec[n++], buffer); |
336 | if (highlight) | |
61cbdc4b | 337 | IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_OFF); |
843d2643 LP |
338 | IOVEC_SET_STRING(iovec[n++], "\n"); |
339 | ||
340 | if (writev(console_fd, iovec, n) < 0) | |
341 | return -errno; | |
5899f3b7 | 342 | |
843d2643 | 343 | return 1; |
16801e90 | 344 | } |
5899f3b7 | 345 | |
16801e90 LP |
346 | static int write_to_syslog( |
347 | int level, | |
348 | const char*file, | |
349 | int line, | |
350 | const char *func, | |
fdf9f9bb ZJS |
351 | const char *object_name, |
352 | const char *object, | |
843d2643 | 353 | const char *buffer) { |
16801e90 LP |
354 | |
355 | char header_priority[16], header_time[64], header_pid[16]; | |
b92bea5d ZJS |
356 | struct iovec iovec[5] = {}; |
357 | struct msghdr msghdr = { | |
358 | .msg_iov = iovec, | |
359 | .msg_iovlen = ELEMENTSOF(iovec), | |
360 | }; | |
16801e90 LP |
361 | time_t t; |
362 | struct tm *tm; | |
363 | ||
364 | if (syslog_fd < 0) | |
843d2643 | 365 | return 0; |
16801e90 | 366 | |
29db5834 | 367 | snprintf(header_priority, sizeof(header_priority), "<%i>", level); |
16801e90 LP |
368 | char_array_0(header_priority); |
369 | ||
370 | t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC); | |
fdf9f9bb ZJS |
371 | tm = localtime(&t); |
372 | if (!tm) | |
16801e90 LP |
373 | return -EINVAL; |
374 | ||
375 | if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0) | |
376 | return -EINVAL; | |
377 | ||
bb00e604 | 378 | snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) getpid()); |
16801e90 LP |
379 | char_array_0(header_pid); |
380 | ||
16801e90 LP |
381 | IOVEC_SET_STRING(iovec[0], header_priority); |
382 | IOVEC_SET_STRING(iovec[1], header_time); | |
5b6319dc | 383 | IOVEC_SET_STRING(iovec[2], program_invocation_short_name); |
16801e90 LP |
384 | IOVEC_SET_STRING(iovec[3], header_pid); |
385 | IOVEC_SET_STRING(iovec[4], buffer); | |
386 | ||
c899f8c6 | 387 | /* When using syslog via SOCK_STREAM separate the messages by NUL chars */ |
c31e1495 LP |
388 | if (syslog_is_stream) |
389 | iovec[4].iov_len++; | |
390 | ||
c31e1495 LP |
391 | for (;;) { |
392 | ssize_t n; | |
393 | ||
8f7f7a1b MS |
394 | n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL); |
395 | if (n < 0) | |
c31e1495 LP |
396 | return -errno; |
397 | ||
398 | if (!syslog_is_stream || | |
399 | (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec))) | |
400 | break; | |
401 | ||
402 | IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n); | |
403 | } | |
16801e90 | 404 | |
843d2643 | 405 | return 1; |
16801e90 LP |
406 | } |
407 | ||
408 | static int write_to_kmsg( | |
409 | int level, | |
410 | const char*file, | |
411 | int line, | |
412 | const char *func, | |
fdf9f9bb ZJS |
413 | const char *object_name, |
414 | const char *object, | |
843d2643 | 415 | const char *buffer) { |
16801e90 LP |
416 | |
417 | char header_priority[16], header_pid[16]; | |
b92bea5d | 418 | struct iovec iovec[5] = {}; |
16801e90 LP |
419 | |
420 | if (kmsg_fd < 0) | |
843d2643 | 421 | return 0; |
16801e90 | 422 | |
29db5834 | 423 | snprintf(header_priority, sizeof(header_priority), "<%i>", level); |
16801e90 LP |
424 | char_array_0(header_priority); |
425 | ||
bb00e604 | 426 | snprintf(header_pid, sizeof(header_pid), "[%lu]: ", (unsigned long) getpid()); |
16801e90 LP |
427 | char_array_0(header_pid); |
428 | ||
16801e90 | 429 | IOVEC_SET_STRING(iovec[0], header_priority); |
5b6319dc | 430 | IOVEC_SET_STRING(iovec[1], program_invocation_short_name); |
16801e90 LP |
431 | IOVEC_SET_STRING(iovec[2], header_pid); |
432 | IOVEC_SET_STRING(iovec[3], buffer); | |
843d2643 | 433 | IOVEC_SET_STRING(iovec[4], "\n"); |
16801e90 LP |
434 | |
435 | if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0) | |
436 | return -errno; | |
437 | ||
843d2643 | 438 | return 1; |
16801e90 LP |
439 | } |
440 | ||
41a79f10 ZJS |
441 | static int log_do_header(char *header, size_t size, |
442 | int level, | |
443 | const char *file, int line, const char *func, | |
444 | const char *object_name, const char *object) { | |
445 | snprintf(header, size, | |
5ba081b0 | 446 | "PRIORITY=%i\n" |
3eff4208 | 447 | "SYSLOG_FACILITY=%i\n" |
e429981b ZJS |
448 | "%s%.*s%s" |
449 | "%s%.*i%s" | |
450 | "%s%.*s%s" | |
fdf9f9bb | 451 | "%s%.*s%s" |
41a79f10 | 452 | "SYSLOG_IDENTIFIER=%s\n", |
5ba081b0 | 453 | LOG_PRI(level), |
3eff4208 | 454 | LOG_FAC(level), |
e429981b ZJS |
455 | file ? "CODE_FILE=" : "", |
456 | file ? LINE_MAX : 0, file, /* %.0s means no output */ | |
457 | file ? "\n" : "", | |
458 | line ? "CODE_LINE=" : "", | |
459 | line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */ | |
460 | line ? "\n" : "", | |
461 | func ? "CODE_FUNCTION=" : "", | |
462 | func ? LINE_MAX : 0, func, | |
463 | func ? "\n" : "", | |
fdf9f9bb ZJS |
464 | object ? object_name : "", |
465 | object ? LINE_MAX : 0, object, /* %.0s means no output */ | |
466 | object ? "\n" : "", | |
d29b05a4 | 467 | program_invocation_short_name); |
41a79f10 ZJS |
468 | header[size - 1] = '\0'; |
469 | return 0; | |
470 | } | |
5ba081b0 | 471 | |
41a79f10 ZJS |
472 | static int write_to_journal( |
473 | int level, | |
474 | const char*file, | |
475 | int line, | |
476 | const char *func, | |
477 | const char *object_name, | |
478 | const char *object, | |
479 | const char *buffer) { | |
480 | ||
481 | char header[LINE_MAX]; | |
b92bea5d ZJS |
482 | struct iovec iovec[4] = {}; |
483 | struct msghdr mh = {}; | |
41a79f10 ZJS |
484 | |
485 | if (journal_fd < 0) | |
486 | return 0; | |
487 | ||
488 | log_do_header(header, sizeof(header), level, | |
489 | file, line, func, object_name, object); | |
5ba081b0 | 490 | |
5ba081b0 | 491 | IOVEC_SET_STRING(iovec[0], header); |
41a79f10 ZJS |
492 | IOVEC_SET_STRING(iovec[1], "MESSAGE="); |
493 | IOVEC_SET_STRING(iovec[2], buffer); | |
494 | IOVEC_SET_STRING(iovec[3], "\n"); | |
5ba081b0 | 495 | |
5ba081b0 LP |
496 | mh.msg_iov = iovec; |
497 | mh.msg_iovlen = ELEMENTSOF(iovec); | |
498 | ||
499 | if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0) | |
500 | return -errno; | |
501 | ||
502 | return 1; | |
503 | } | |
504 | ||
843d2643 LP |
505 | static int log_dispatch( |
506 | int level, | |
507 | const char*file, | |
508 | int line, | |
509 | const char *func, | |
fdf9f9bb ZJS |
510 | const char *object_name, |
511 | const char *object, | |
9726b29e | 512 | char *buffer) { |
843d2643 | 513 | |
9726b29e | 514 | int r = 0; |
843d2643 | 515 | |
9fae33d2 LP |
516 | if (log_target == LOG_TARGET_NULL) |
517 | return 0; | |
518 | ||
29db5834 | 519 | /* Patch in LOG_DAEMON facility if necessary */ |
7d76f312 | 520 | if ((level & LOG_FACMASK) == 0) |
3eff4208 | 521 | level = log_facility | LOG_PRI(level); |
29db5834 | 522 | |
9726b29e LP |
523 | do { |
524 | char *e; | |
9499b235 | 525 | int k = 0; |
843d2643 | 526 | |
9726b29e | 527 | buffer += strspn(buffer, NEWLINE); |
843d2643 | 528 | |
9726b29e LP |
529 | if (buffer[0] == 0) |
530 | break; | |
843d2643 | 531 | |
9726b29e LP |
532 | if ((e = strpbrk(buffer, NEWLINE))) |
533 | *(e++) = 0; | |
843d2643 | 534 | |
bb7df0da | 535 | if (log_target == LOG_TARGET_AUTO || |
5ba081b0 LP |
536 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
537 | log_target == LOG_TARGET_JOURNAL) { | |
538 | ||
fdf9f9bb ZJS |
539 | k = write_to_journal(level, file, line, func, |
540 | object_name, object, buffer); | |
4e7bc3f3 LP |
541 | if (k < 0) { |
542 | if (k != -EAGAIN) | |
5ba081b0 LP |
543 | log_close_journal(); |
544 | log_open_kmsg(); | |
4e7bc3f3 | 545 | } else if (k > 0) |
5ba081b0 LP |
546 | r++; |
547 | } | |
548 | ||
549 | if (log_target == LOG_TARGET_SYSLOG_OR_KMSG || | |
9726b29e LP |
550 | log_target == LOG_TARGET_SYSLOG) { |
551 | ||
fdf9f9bb ZJS |
552 | k = write_to_syslog(level, file, line, func, |
553 | object_name, object, buffer); | |
4e7bc3f3 LP |
554 | if (k < 0) { |
555 | if (k != -EAGAIN) | |
8f7f7a1b | 556 | log_close_syslog(); |
9726b29e | 557 | log_open_kmsg(); |
4e7bc3f3 | 558 | } else if (k > 0) |
9726b29e LP |
559 | r++; |
560 | } | |
561 | ||
9499b235 | 562 | if (k <= 0 && |
bb7df0da | 563 | (log_target == LOG_TARGET_AUTO || |
a6903061 | 564 | log_target == LOG_TARGET_SAFE || |
bb7df0da | 565 | log_target == LOG_TARGET_SYSLOG_OR_KMSG || |
678d485a | 566 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || |
9499b235 | 567 | log_target == LOG_TARGET_KMSG)) { |
9726b29e | 568 | |
fdf9f9bb ZJS |
569 | k = write_to_kmsg(level, file, line, func, |
570 | object_name, object, buffer); | |
4e7bc3f3 LP |
571 | if (k < 0) { |
572 | log_close_kmsg(); | |
9726b29e | 573 | log_open_console(); |
4e7bc3f3 | 574 | } else if (k > 0) |
9726b29e LP |
575 | r++; |
576 | } | |
577 | ||
8f7f7a1b | 578 | if (k <= 0) { |
fdf9f9bb ZJS |
579 | k = write_to_console(level, file, line, func, |
580 | object_name, object, buffer); | |
8f7f7a1b MS |
581 | if (k < 0) |
582 | return k; | |
583 | } | |
9726b29e LP |
584 | |
585 | buffer = e; | |
586 | } while (buffer); | |
587 | ||
588 | return r; | |
843d2643 LP |
589 | } |
590 | ||
2149e37c LP |
591 | int log_dump_internal( |
592 | int level, | |
593 | const char*file, | |
594 | int line, | |
595 | const char *func, | |
596 | char *buffer) { | |
597 | ||
5c0aa72a | 598 | PROTECT_ERRNO; |
2149e37c LP |
599 | |
600 | /* This modifies the buffer... */ | |
601 | ||
602 | if (_likely_(LOG_PRI(level) > log_max_level)) | |
603 | return 0; | |
604 | ||
5c0aa72a | 605 | return log_dispatch(level, file, line, func, NULL, NULL, buffer); |
2149e37c LP |
606 | } |
607 | ||
17a94911 | 608 | int log_metav( |
16801e90 LP |
609 | int level, |
610 | const char*file, | |
611 | int line, | |
612 | const char *func, | |
17a94911 LP |
613 | const char *format, |
614 | va_list ap) { | |
16801e90 | 615 | |
5c0aa72a | 616 | PROTECT_ERRNO; |
addab137 | 617 | char buffer[LINE_MAX]; |
16801e90 | 618 | |
93a46b0b | 619 | if (_likely_(LOG_PRI(level) > log_max_level)) |
843d2643 | 620 | return 0; |
16801e90 | 621 | |
843d2643 | 622 | vsnprintf(buffer, sizeof(buffer), format, ap); |
843d2643 LP |
623 | char_array_0(buffer); |
624 | ||
5c0aa72a | 625 | return log_dispatch(level, file, line, func, NULL, NULL, buffer); |
185986c6 | 626 | } |
16801e90 | 627 | |
17a94911 LP |
628 | int log_meta( |
629 | int level, | |
630 | const char*file, | |
631 | int line, | |
632 | const char *func, | |
633 | const char *format, ...) { | |
634 | ||
635 | int r; | |
636 | va_list ap; | |
637 | ||
638 | va_start(ap, format); | |
639 | r = log_metav(level, file, line, func, format, ap); | |
640 | va_end(ap); | |
641 | ||
642 | return r; | |
643 | } | |
644 | ||
fdf9f9bb ZJS |
645 | int log_metav_object( |
646 | int level, | |
647 | const char*file, | |
648 | int line, | |
649 | const char *func, | |
650 | const char *object_name, | |
651 | const char *object, | |
652 | const char *format, | |
653 | va_list ap) { | |
654 | ||
5c0aa72a | 655 | PROTECT_ERRNO; |
fdf9f9bb | 656 | char buffer[LINE_MAX]; |
fdf9f9bb ZJS |
657 | |
658 | if (_likely_(LOG_PRI(level) > log_max_level)) | |
659 | return 0; | |
660 | ||
fdf9f9bb ZJS |
661 | vsnprintf(buffer, sizeof(buffer), format, ap); |
662 | char_array_0(buffer); | |
663 | ||
5c0aa72a LP |
664 | return log_dispatch(level, file, line, func, |
665 | object_name, object, buffer); | |
fdf9f9bb ZJS |
666 | } |
667 | ||
668 | int log_meta_object( | |
669 | int level, | |
670 | const char*file, | |
671 | int line, | |
672 | const char *func, | |
673 | const char *object_name, | |
674 | const char *object, | |
675 | const char *format, ...) { | |
676 | ||
677 | int r; | |
678 | va_list ap; | |
679 | ||
680 | va_start(ap, format); | |
681 | r = log_metav_object(level, file, line, func, | |
682 | object_name, object, format, ap); | |
683 | va_end(ap); | |
684 | ||
685 | return r; | |
686 | } | |
687 | ||
a3f914b2 MS |
688 | #pragma GCC diagnostic push |
689 | #pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
80514f9c | 690 | static void log_assert(int level, const char *text, const char *file, int line, const char *func, const char *format) { |
addab137 | 691 | static char buffer[LINE_MAX]; |
185986c6 | 692 | |
50f72bca ZJS |
693 | if (_likely_(LOG_PRI(level) > log_max_level)) |
694 | return; | |
695 | ||
b7f33638 | 696 | snprintf(buffer, sizeof(buffer), format, text, file, line, func); |
185986c6 LP |
697 | |
698 | char_array_0(buffer); | |
699 | log_abort_msg = buffer; | |
700 | ||
80514f9c | 701 | log_dispatch(level, file, line, func, NULL, NULL, buffer); |
5899f3b7 | 702 | } |
a3f914b2 | 703 | #pragma GCC diagnostic pop |
34f0e866 | 704 | |
6a39419f | 705 | _noreturn_ void log_assert_failed(const char *text, const char *file, int line, const char *func) { |
80514f9c LP |
706 | log_assert(LOG_CRIT, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Aborting."); |
707 | abort(); | |
b7f33638 MS |
708 | } |
709 | ||
6a39419f | 710 | _noreturn_ void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func) { |
80514f9c LP |
711 | log_assert(LOG_CRIT, text, file, line, func, "Code should not be reached '%s' at %s:%u, function %s(). Aborting."); |
712 | abort(); | |
713 | } | |
714 | ||
715 | void log_assert_failed_return(const char *text, const char *file, int line, const char *func) { | |
716 | log_assert(LOG_DEBUG, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Ignoring."); | |
b7f33638 MS |
717 | } |
718 | ||
877d54e9 | 719 | int log_oom_internal(const char *file, int line, const char *func) { |
6dc1e7e0 MS |
720 | log_meta(LOG_ERR, file, line, func, "Out of memory."); |
721 | return -ENOMEM; | |
722 | } | |
723 | ||
877d54e9 LP |
724 | int log_struct_internal( |
725 | int level, | |
726 | const char *file, | |
727 | int line, | |
728 | const char *func, | |
729 | const char *format, ...) { | |
730 | ||
5c0aa72a | 731 | PROTECT_ERRNO; |
877d54e9 LP |
732 | va_list ap; |
733 | int r; | |
734 | ||
735 | if (_likely_(LOG_PRI(level) > log_max_level)) | |
736 | return 0; | |
737 | ||
738 | if (log_target == LOG_TARGET_NULL) | |
739 | return 0; | |
740 | ||
741 | if ((level & LOG_FACMASK) == 0) | |
742 | level = log_facility | LOG_PRI(level); | |
743 | ||
877d54e9 LP |
744 | if ((log_target == LOG_TARGET_AUTO || |
745 | log_target == LOG_TARGET_JOURNAL_OR_KMSG || | |
746 | log_target == LOG_TARGET_JOURNAL) && | |
747 | journal_fd >= 0) { | |
748 | ||
749 | char header[LINE_MAX]; | |
b92bea5d | 750 | struct iovec iovec[17] = {}; |
877d54e9 | 751 | unsigned n = 0, i; |
543295ad ZJS |
752 | struct msghdr mh = { |
753 | .msg_iov = iovec, | |
754 | }; | |
41a79f10 | 755 | static const char nl = '\n'; |
877d54e9 LP |
756 | |
757 | /* If the journal is available do structured logging */ | |
41a79f10 ZJS |
758 | log_do_header(header, sizeof(header), level, |
759 | file, line, func, NULL, NULL); | |
877d54e9 LP |
760 | IOVEC_SET_STRING(iovec[n++], header); |
761 | ||
762 | va_start(ap, format); | |
763 | while (format && n + 1 < ELEMENTSOF(iovec)) { | |
764 | char *buf; | |
963ddb91 | 765 | va_list aq; |
877d54e9 | 766 | |
963ddb91 LP |
767 | /* We need to copy the va_list structure, |
768 | * since vasprintf() leaves it afterwards at | |
769 | * an undefined location */ | |
770 | ||
771 | va_copy(aq, ap); | |
772 | if (vasprintf(&buf, format, aq) < 0) { | |
773 | va_end(aq); | |
877d54e9 LP |
774 | r = -ENOMEM; |
775 | goto finish; | |
776 | } | |
963ddb91 LP |
777 | va_end(aq); |
778 | ||
779 | /* Now, jump enough ahead, so that we point to | |
780 | * the next format string */ | |
781 | VA_FORMAT_ADVANCE(format, ap); | |
877d54e9 LP |
782 | |
783 | IOVEC_SET_STRING(iovec[n++], buf); | |
784 | ||
785 | iovec[n].iov_base = (char*) &nl; | |
786 | iovec[n].iov_len = 1; | |
787 | n++; | |
788 | ||
789 | format = va_arg(ap, char *); | |
790 | } | |
877d54e9 | 791 | |
877d54e9 LP |
792 | mh.msg_iovlen = n; |
793 | ||
794 | if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0) | |
795 | r = -errno; | |
796 | else | |
797 | r = 1; | |
798 | ||
799 | finish: | |
e98055de | 800 | va_end(ap); |
877d54e9 LP |
801 | for (i = 1; i < n; i += 2) |
802 | free(iovec[i].iov_base); | |
803 | ||
804 | } else { | |
805 | char buf[LINE_MAX]; | |
806 | bool found = false; | |
807 | ||
808 | /* Fallback if journal logging is not available */ | |
809 | ||
810 | va_start(ap, format); | |
811 | while (format) { | |
963ddb91 | 812 | va_list aq; |
877d54e9 | 813 | |
963ddb91 LP |
814 | va_copy(aq, ap); |
815 | vsnprintf(buf, sizeof(buf), format, aq); | |
816 | va_end(aq); | |
877d54e9 LP |
817 | char_array_0(buf); |
818 | ||
819 | if (startswith(buf, "MESSAGE=")) { | |
820 | found = true; | |
821 | break; | |
822 | } | |
823 | ||
963ddb91 LP |
824 | VA_FORMAT_ADVANCE(format, ap); |
825 | ||
877d54e9 LP |
826 | format = va_arg(ap, char *); |
827 | } | |
828 | va_end(ap); | |
829 | ||
830 | if (found) | |
fdf9f9bb ZJS |
831 | r = log_dispatch(level, file, line, func, |
832 | NULL, NULL, buf + 8); | |
877d54e9 LP |
833 | else |
834 | r = -EINVAL; | |
835 | } | |
836 | ||
877d54e9 LP |
837 | return r; |
838 | } | |
839 | ||
34f0e866 LP |
840 | int log_set_target_from_string(const char *e) { |
841 | LogTarget t; | |
842 | ||
5ba081b0 LP |
843 | t = log_target_from_string(e); |
844 | if (t < 0) | |
34f0e866 LP |
845 | return -EINVAL; |
846 | ||
847 | log_set_target(t); | |
848 | return 0; | |
849 | } | |
850 | ||
851 | int log_set_max_level_from_string(const char *e) { | |
852 | int t; | |
853 | ||
5ba081b0 LP |
854 | t = log_level_from_string(e); |
855 | if (t < 0) | |
856 | return t; | |
34f0e866 LP |
857 | |
858 | log_set_max_level(t); | |
859 | return 0; | |
860 | } | |
861 | ||
862 | void log_parse_environment(void) { | |
863 | const char *e; | |
864 | ||
4db17f29 | 865 | e = secure_getenv("SYSTEMD_LOG_TARGET"); |
88fae6e0 LP |
866 | if (e && log_set_target_from_string(e) < 0) |
867 | log_warning("Failed to parse log target %s. Ignoring.", e); | |
34f0e866 | 868 | |
4db17f29 | 869 | e = secure_getenv("SYSTEMD_LOG_LEVEL"); |
88fae6e0 LP |
870 | if (e && log_set_max_level_from_string(e) < 0) |
871 | log_warning("Failed to parse log level %s. Ignoring.", e); | |
bbe63281 | 872 | |
4db17f29 | 873 | e = secure_getenv("SYSTEMD_LOG_COLOR"); |
88fae6e0 LP |
874 | if (e && log_show_color_from_string(e) < 0) |
875 | log_warning("Failed to parse bool %s. Ignoring.", e); | |
bbe63281 | 876 | |
4db17f29 | 877 | e = secure_getenv("SYSTEMD_LOG_LOCATION"); |
88fae6e0 LP |
878 | if (e && log_show_location_from_string(e) < 0) |
879 | log_warning("Failed to parse bool %s. Ignoring.", e); | |
34f0e866 LP |
880 | } |
881 | ||
1adf1049 LP |
882 | LogTarget log_get_target(void) { |
883 | return log_target; | |
884 | } | |
885 | ||
886 | int log_get_max_level(void) { | |
887 | return log_max_level; | |
888 | } | |
889 | ||
bbe63281 LP |
890 | void log_show_color(bool b) { |
891 | show_color = b; | |
892 | } | |
893 | ||
894 | void log_show_location(bool b) { | |
895 | show_location = b; | |
896 | } | |
897 | ||
898 | int log_show_color_from_string(const char *e) { | |
899 | int t; | |
900 | ||
5ba081b0 LP |
901 | t = parse_boolean(e); |
902 | if (t < 0) | |
903 | return t; | |
bbe63281 LP |
904 | |
905 | log_show_color(t); | |
906 | return 0; | |
907 | } | |
908 | ||
909 | int log_show_location_from_string(const char *e) { | |
910 | int t; | |
911 | ||
5ba081b0 LP |
912 | t = parse_boolean(e); |
913 | if (t < 0) | |
914 | return t; | |
bbe63281 LP |
915 | |
916 | log_show_location(t); | |
917 | return 0; | |
918 | } | |
919 | ||
81270860 LP |
920 | bool log_on_console(void) { |
921 | if (log_target == LOG_TARGET_CONSOLE) | |
922 | return true; | |
923 | ||
924 | return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0; | |
925 | } | |
926 | ||
34f0e866 LP |
927 | static const char *const log_target_table[] = { |
928 | [LOG_TARGET_CONSOLE] = "console", | |
34f0e866 | 929 | [LOG_TARGET_KMSG] = "kmsg", |
5ba081b0 LP |
930 | [LOG_TARGET_JOURNAL] = "journal", |
931 | [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg", | |
932 | [LOG_TARGET_SYSLOG] = "syslog", | |
843d2643 | 933 | [LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg", |
5ba081b0 | 934 | [LOG_TARGET_AUTO] = "auto", |
a6903061 | 935 | [LOG_TARGET_SAFE] = "safe", |
5ba081b0 | 936 | [LOG_TARGET_NULL] = "null" |
34f0e866 LP |
937 | }; |
938 | ||
939 | DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget); |