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Commit | Line | Data |
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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
a7334b09 | 2 | |
c9b97d2a | 3 | #include <errno.h> |
16801e90 | 4 | #include <fcntl.h> |
11c3a366 TA |
5 | #include <inttypes.h> |
6 | #include <limits.h> | |
07630cea LP |
7 | #include <stdarg.h> |
8 | #include <stddef.h> | |
11c3a366 | 9 | #include <sys/signalfd.h> |
bc694c06 | 10 | #include <sys/stat.h> |
11c3a366 TA |
11 | #include <sys/time.h> |
12 | #include <sys/uio.h> | |
16801e90 | 13 | #include <sys/un.h> |
07630cea | 14 | #include <unistd.h> |
5899f3b7 | 15 | |
158350e8 | 16 | #include "sd-messages.h" |
07630cea | 17 | |
b5efdb8a | 18 | #include "alloc-util.h" |
2b2fec7d | 19 | #include "errno-util.h" |
3ffd4af2 | 20 | #include "fd-util.h" |
f97b34a6 | 21 | #include "format-util.h" |
afc5dbf3 | 22 | #include "io-util.h" |
3ffd4af2 | 23 | #include "log.h" |
07630cea | 24 | #include "macro.h" |
4e731273 LP |
25 | #include "parse-util.h" |
26 | #include "proc-cmdline.h" | |
0b452006 | 27 | #include "process-util.h" |
78158d13 | 28 | #include "ratelimit.h" |
24882e06 | 29 | #include "signal-util.h" |
07630cea | 30 | #include "socket-util.h" |
15a5e950 | 31 | #include "stdio-util.h" |
8b43440b | 32 | #include "string-table.h" |
07630cea | 33 | #include "string-util.h" |
7ccbd1ae | 34 | #include "syslog-util.h" |
07630cea | 35 | #include "terminal-util.h" |
93cc7779 | 36 | #include "time-util.h" |
d04ce5a9 | 37 | #include "utf8.h" |
5899f3b7 | 38 | |
bb99a35a LP |
39 | #define SNDBUF_SIZE (8*1024*1024) |
40 | ||
16801e90 | 41 | static LogTarget log_target = LOG_TARGET_CONSOLE; |
ff524019 ZJS |
42 | static int log_max_level[] = {LOG_INFO, LOG_INFO}; |
43 | assert_cc(ELEMENTSOF(log_max_level) == _LOG_REALM_MAX); | |
3eff4208 | 44 | static int log_facility = LOG_DAEMON; |
16801e90 | 45 | |
843d2643 | 46 | static int console_fd = STDERR_FILENO; |
16801e90 LP |
47 | static int syslog_fd = -1; |
48 | static int kmsg_fd = -1; | |
5ba081b0 | 49 | static int journal_fd = -1; |
16801e90 | 50 | |
c31e1495 LP |
51 | static bool syslog_is_stream = false; |
52 | ||
bbe63281 LP |
53 | static bool show_color = false; |
54 | static bool show_location = false; | |
c5673ed0 | 55 | static bool show_time = false; |
bbe63281 | 56 | |
c1dc6153 | 57 | static bool upgrade_syslog_to_journal = false; |
48a601fe | 58 | static bool always_reopen_console = false; |
16e4fd87 | 59 | static bool open_when_needed = false; |
adf47c91 | 60 | static bool prohibit_ipc = false; |
c1dc6153 | 61 | |
35b8ca3a | 62 | /* Akin to glibc's __abort_msg; which is private and we hence cannot |
185986c6 LP |
63 | * use here. */ |
64 | static char *log_abort_msg = NULL; | |
65 | ||
780747da ZJS |
66 | /* An assert to use in logging functions that does not call recursively |
67 | * into our logging functions (since that might lead to a loop). */ | |
68 | #define assert_raw(expr) \ | |
69 | do { \ | |
70 | if (_unlikely_(!(expr))) { \ | |
71 | fputs(#expr "\n", stderr); \ | |
72 | abort(); \ | |
73 | } \ | |
74 | } while (false) | |
75 | ||
cc2b9e6b | 76 | static void log_close_console(void) { |
e7685a77 | 77 | console_fd = safe_close_above_stdio(console_fd); |
16801e90 LP |
78 | } |
79 | ||
843d2643 | 80 | static int log_open_console(void) { |
16801e90 | 81 | |
cc2b9e6b AJ |
82 | if (!always_reopen_console) { |
83 | console_fd = STDERR_FILENO; | |
16801e90 | 84 | return 0; |
cc2b9e6b | 85 | } |
843d2643 | 86 | |
cc2b9e6b | 87 | if (console_fd < 3) { |
d5a1c99b | 88 | int fd; |
7fe2903c | 89 | |
d5a1c99b LP |
90 | fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
91 | if (fd < 0) | |
92 | return fd; | |
93 | ||
94 | console_fd = fd_move_above_stdio(fd); | |
cc2b9e6b | 95 | } |
843d2643 LP |
96 | |
97 | return 0; | |
98 | } | |
99 | ||
cc2b9e6b | 100 | static void log_close_kmsg(void) { |
03e334a1 | 101 | kmsg_fd = safe_close(kmsg_fd); |
843d2643 LP |
102 | } |
103 | ||
104 | static int log_open_kmsg(void) { | |
16801e90 LP |
105 | |
106 | if (kmsg_fd >= 0) | |
107 | return 0; | |
108 | ||
674f8283 | 109 | kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC); |
cd15c418 | 110 | if (kmsg_fd < 0) |
16801e90 | 111 | return -errno; |
0dae83f9 | 112 | |
7fe2903c | 113 | kmsg_fd = fd_move_above_stdio(kmsg_fd); |
16801e90 LP |
114 | return 0; |
115 | } | |
116 | ||
cc2b9e6b | 117 | static void log_close_syslog(void) { |
03e334a1 | 118 | syslog_fd = safe_close(syslog_fd); |
16801e90 LP |
119 | } |
120 | ||
c31e1495 | 121 | static int create_log_socket(int type) { |
8b18fdc1 | 122 | struct timeval tv; |
95066a90 | 123 | int fd; |
c31e1495 | 124 | |
8b18fdc1 | 125 | fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0); |
5ba081b0 | 126 | if (fd < 0) |
c31e1495 LP |
127 | return -errno; |
128 | ||
7fe2903c | 129 | fd = fd_move_above_stdio(fd); |
0474ef7b | 130 | (void) fd_inc_sndbuf(fd, SNDBUF_SIZE); |
bb99a35a | 131 | |
7fe2903c LP |
132 | /* We need a blocking fd here since we'd otherwise lose messages way too early. However, let's not hang forever |
133 | * in the unlikely case of a deadlock. */ | |
df0ff127 | 134 | if (getpid_cached() == 1) |
4d89874a ZJS |
135 | timeval_store(&tv, 10 * USEC_PER_MSEC); |
136 | else | |
137 | timeval_store(&tv, 10 * USEC_PER_SEC); | |
086891e5 | 138 | (void) setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); |
8b18fdc1 | 139 | |
c31e1495 LP |
140 | return fd; |
141 | } | |
142 | ||
843d2643 | 143 | static int log_open_syslog(void) { |
95066a90 LP |
144 | |
145 | static const union sockaddr_union sa = { | |
b92bea5d ZJS |
146 | .un.sun_family = AF_UNIX, |
147 | .un.sun_path = "/dev/log", | |
148 | }; | |
16801e90 | 149 | |
95066a90 LP |
150 | int r; |
151 | ||
16801e90 LP |
152 | if (syslog_fd >= 0) |
153 | return 0; | |
154 | ||
5ba081b0 LP |
155 | syslog_fd = create_log_socket(SOCK_DGRAM); |
156 | if (syslog_fd < 0) { | |
157 | r = syslog_fd; | |
843d2643 | 158 | goto fail; |
16801e90 LP |
159 | } |
160 | ||
fc2fffe7 | 161 | if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) { |
03e334a1 | 162 | safe_close(syslog_fd); |
c31e1495 LP |
163 | |
164 | /* Some legacy syslog systems still use stream | |
165 | * sockets. They really shouldn't. But what can we | |
166 | * do... */ | |
5ba081b0 LP |
167 | syslog_fd = create_log_socket(SOCK_STREAM); |
168 | if (syslog_fd < 0) { | |
169 | r = syslog_fd; | |
c31e1495 LP |
170 | goto fail; |
171 | } | |
172 | ||
fc2fffe7 | 173 | if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) { |
c31e1495 LP |
174 | r = -errno; |
175 | goto fail; | |
176 | } | |
177 | ||
178 | syslog_is_stream = true; | |
179 | } else | |
180 | syslog_is_stream = false; | |
181 | ||
16801e90 | 182 | return 0; |
843d2643 LP |
183 | |
184 | fail: | |
185 | log_close_syslog(); | |
843d2643 LP |
186 | return r; |
187 | } | |
188 | ||
cc2b9e6b | 189 | static void log_close_journal(void) { |
03e334a1 | 190 | journal_fd = safe_close(journal_fd); |
5ba081b0 LP |
191 | } |
192 | ||
193 | static int log_open_journal(void) { | |
95066a90 LP |
194 | |
195 | static const union sockaddr_union sa = { | |
b92bea5d ZJS |
196 | .un.sun_family = AF_UNIX, |
197 | .un.sun_path = "/run/systemd/journal/socket", | |
198 | }; | |
95066a90 | 199 | |
5ba081b0 LP |
200 | int r; |
201 | ||
202 | if (journal_fd >= 0) | |
203 | return 0; | |
204 | ||
205 | journal_fd = create_log_socket(SOCK_DGRAM); | |
206 | if (journal_fd < 0) { | |
207 | r = journal_fd; | |
208 | goto fail; | |
209 | } | |
210 | ||
fc2fffe7 | 211 | if (connect(journal_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) { |
5ba081b0 LP |
212 | r = -errno; |
213 | goto fail; | |
214 | } | |
215 | ||
5ba081b0 LP |
216 | return 0; |
217 | ||
218 | fail: | |
219 | log_close_journal(); | |
5ba081b0 LP |
220 | return r; |
221 | } | |
222 | ||
bc694c06 DDM |
223 | static bool stderr_is_journal(void) { |
224 | _cleanup_free_ char *w = NULL; | |
225 | const char *e; | |
226 | uint64_t dev, ino; | |
227 | struct stat st; | |
228 | ||
229 | e = getenv("JOURNAL_STREAM"); | |
230 | if (!e) | |
231 | return false; | |
232 | ||
233 | if (extract_first_word(&e, &w, ":", EXTRACT_DONT_COALESCE_SEPARATORS) <= 0) | |
234 | return false; | |
235 | if (!e) | |
236 | return false; | |
237 | ||
238 | if (safe_atou64(w, &dev) < 0) | |
239 | return false; | |
240 | if (safe_atou64(e, &ino) < 0) | |
241 | return false; | |
242 | ||
243 | if (fstat(STDERR_FILENO, &st) < 0) | |
244 | return false; | |
245 | ||
246 | return st.st_dev == dev && st.st_ino == ino; | |
247 | } | |
248 | ||
843d2643 LP |
249 | int log_open(void) { |
250 | int r; | |
251 | ||
e3e42fc2 ZJS |
252 | /* Do not call from library code. */ |
253 | ||
843d2643 LP |
254 | /* If we don't use the console we close it here, to not get |
255 | * killed by SAK. If we don't use syslog we close it here so | |
256 | * that we are not confused by somebody deleting the socket in | |
cc2b9e6b AJ |
257 | * the fs, and to make sure we don't use it if prohibit_ipc is |
258 | * set. If we don't use /dev/kmsg we still keep it open, | |
843d2643 LP |
259 | * because there is no reason to close it. */ |
260 | ||
9fae33d2 | 261 | if (log_target == LOG_TARGET_NULL) { |
5ba081b0 | 262 | log_close_journal(); |
9fae33d2 LP |
263 | log_close_syslog(); |
264 | log_close_console(); | |
265 | return 0; | |
266 | } | |
267 | ||
bc694c06 | 268 | if (log_target != LOG_TARGET_AUTO || getpid_cached() == 1 || stderr_is_journal()) { |
bb7df0da | 269 | |
adf47c91 LP |
270 | if (!prohibit_ipc && |
271 | IN_SET(log_target, LOG_TARGET_AUTO, | |
5b5688af ZJS |
272 | LOG_TARGET_JOURNAL_OR_KMSG, |
273 | LOG_TARGET_JOURNAL)) { | |
5ba081b0 LP |
274 | r = log_open_journal(); |
275 | if (r >= 0) { | |
276 | log_close_syslog(); | |
bb7df0da LP |
277 | log_close_console(); |
278 | return r; | |
279 | } | |
5ba081b0 LP |
280 | } |
281 | ||
adf47c91 LP |
282 | if (!prohibit_ipc && |
283 | IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG, | |
5b5688af | 284 | LOG_TARGET_SYSLOG)) { |
5ba081b0 LP |
285 | r = log_open_syslog(); |
286 | if (r >= 0) { | |
287 | log_close_journal(); | |
288 | log_close_console(); | |
289 | return r; | |
290 | } | |
291 | } | |
292 | ||
5b5688af | 293 | if (IN_SET(log_target, LOG_TARGET_AUTO, |
5b5688af ZJS |
294 | LOG_TARGET_JOURNAL_OR_KMSG, |
295 | LOG_TARGET_SYSLOG_OR_KMSG, | |
296 | LOG_TARGET_KMSG)) { | |
5ba081b0 LP |
297 | r = log_open_kmsg(); |
298 | if (r >= 0) { | |
299 | log_close_journal(); | |
bb7df0da LP |
300 | log_close_syslog(); |
301 | log_close_console(); | |
302 | return r; | |
303 | } | |
5ba081b0 | 304 | } |
bb7df0da | 305 | } |
843d2643 | 306 | |
5ba081b0 | 307 | log_close_journal(); |
843d2643 | 308 | log_close_syslog(); |
dcdf86bb | 309 | |
843d2643 | 310 | return log_open_console(); |
16801e90 LP |
311 | } |
312 | ||
313 | void log_set_target(LogTarget target) { | |
314 | assert(target >= 0); | |
315 | assert(target < _LOG_TARGET_MAX); | |
316 | ||
c1dc6153 LP |
317 | if (upgrade_syslog_to_journal) { |
318 | if (target == LOG_TARGET_SYSLOG) | |
319 | target = LOG_TARGET_JOURNAL; | |
320 | else if (target == LOG_TARGET_SYSLOG_OR_KMSG) | |
321 | target = LOG_TARGET_JOURNAL_OR_KMSG; | |
322 | } | |
323 | ||
16801e90 LP |
324 | log_target = target; |
325 | } | |
326 | ||
871e5809 | 327 | void log_close(void) { |
e3e42fc2 ZJS |
328 | /* Do not call from library code. */ |
329 | ||
5ba081b0 | 330 | log_close_journal(); |
871e5809 | 331 | log_close_syslog(); |
5ba081b0 LP |
332 | log_close_kmsg(); |
333 | log_close_console(); | |
871e5809 LP |
334 | } |
335 | ||
4d8a7798 | 336 | void log_forget_fds(void) { |
e3e42fc2 ZJS |
337 | /* Do not call from library code. */ |
338 | ||
5ba081b0 | 339 | console_fd = kmsg_fd = syslog_fd = journal_fd = -1; |
4d8a7798 MS |
340 | } |
341 | ||
ff524019 | 342 | void log_set_max_level_realm(LogRealm realm, int level) { |
16801e90 | 343 | assert((level & LOG_PRIMASK) == level); |
ff524019 | 344 | assert(realm < ELEMENTSOF(log_max_level)); |
16801e90 | 345 | |
ff524019 | 346 | log_max_level[realm] = level; |
16801e90 LP |
347 | } |
348 | ||
3eff4208 LP |
349 | void log_set_facility(int facility) { |
350 | log_facility = facility; | |
351 | } | |
352 | ||
843d2643 | 353 | static int write_to_console( |
20c03b7b | 354 | int level, |
086891e5 | 355 | int error, |
95066a90 | 356 | const char *file, |
20c03b7b LP |
357 | int line, |
358 | const char *func, | |
359 | const char *buffer) { | |
5899f3b7 | 360 | |
c5673ed0 DS |
361 | char location[256], |
362 | header_time[FORMAT_TIMESTAMP_MAX], | |
363 | prefix[1 + DECIMAL_STR_MAX(int) + 2]; | |
364 | struct iovec iovec[8] = {}; | |
37b8d2f6 | 365 | const char *on = NULL, *off = NULL; |
da6053d0 | 366 | size_t n = 0; |
5899f3b7 | 367 | |
843d2643 LP |
368 | if (console_fd < 0) |
369 | return 0; | |
370 | ||
aca83a53 | 371 | if (log_target == LOG_TARGET_CONSOLE_PREFIXED) { |
0474ef7b | 372 | xsprintf(prefix, "<%i>", level); |
e6a7ec4b | 373 | iovec[n++] = IOVEC_MAKE_STRING(prefix); |
aca83a53 LP |
374 | } |
375 | ||
c5673ed0 DS |
376 | if (show_time) { |
377 | if (format_timestamp(header_time, sizeof(header_time), now(CLOCK_REALTIME))) { | |
378 | iovec[n++] = IOVEC_MAKE_STRING(header_time); | |
379 | iovec[n++] = IOVEC_MAKE_STRING(" "); | |
380 | } | |
381 | } | |
382 | ||
37b8d2f6 ZJS |
383 | if (show_color) |
384 | get_log_colors(LOG_PRI(level), &on, &off, NULL); | |
843d2643 | 385 | |
674f8283 | 386 | if (show_location) { |
d35305fe ZJS |
387 | const char *lon = "", *loff = ""; |
388 | if (show_color) { | |
389 | lon = ANSI_HIGHLIGHT_YELLOW4; | |
390 | loff = ANSI_NORMAL; | |
391 | } | |
392 | ||
393 | (void) snprintf(location, sizeof location, "%s%s:%i%s: ", lon, file, line, loff); | |
e6a7ec4b | 394 | iovec[n++] = IOVEC_MAKE_STRING(location); |
674f8283 LP |
395 | } |
396 | ||
37b8d2f6 ZJS |
397 | if (on) |
398 | iovec[n++] = IOVEC_MAKE_STRING(on); | |
e6a7ec4b | 399 | iovec[n++] = IOVEC_MAKE_STRING(buffer); |
37b8d2f6 ZJS |
400 | if (off) |
401 | iovec[n++] = IOVEC_MAKE_STRING(off); | |
e6a7ec4b | 402 | iovec[n++] = IOVEC_MAKE_STRING("\n"); |
843d2643 | 403 | |
0e6eaa2d LP |
404 | if (writev(console_fd, iovec, n) < 0) { |
405 | ||
df0ff127 | 406 | if (errno == EIO && getpid_cached() == 1) { |
0e6eaa2d | 407 | |
e11a5c72 LP |
408 | /* If somebody tried to kick us from our console tty (via vhangup() or suchlike), try |
409 | * to reconnect. */ | |
0e6eaa2d LP |
410 | |
411 | log_close_console(); | |
e11a5c72 | 412 | (void) log_open_console(); |
0e6eaa2d LP |
413 | if (console_fd < 0) |
414 | return 0; | |
415 | ||
416 | if (writev(console_fd, iovec, n) < 0) | |
417 | return -errno; | |
418 | } else | |
419 | return -errno; | |
420 | } | |
5899f3b7 | 421 | |
843d2643 | 422 | return 1; |
16801e90 | 423 | } |
5899f3b7 | 424 | |
16801e90 | 425 | static int write_to_syslog( |
086891e5 LP |
426 | int level, |
427 | int error, | |
95066a90 | 428 | const char *file, |
086891e5 LP |
429 | int line, |
430 | const char *func, | |
086891e5 | 431 | const char *buffer) { |
16801e90 | 432 | |
5ffa8c81 ZJS |
433 | char header_priority[2 + DECIMAL_STR_MAX(int) + 1], |
434 | header_time[64], | |
435 | header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1]; | |
b92bea5d ZJS |
436 | struct iovec iovec[5] = {}; |
437 | struct msghdr msghdr = { | |
438 | .msg_iov = iovec, | |
439 | .msg_iovlen = ELEMENTSOF(iovec), | |
440 | }; | |
16801e90 | 441 | time_t t; |
e0f691e1 | 442 | struct tm tm; |
16801e90 LP |
443 | |
444 | if (syslog_fd < 0) | |
843d2643 | 445 | return 0; |
16801e90 | 446 | |
5ffa8c81 | 447 | xsprintf(header_priority, "<%i>", level); |
16801e90 LP |
448 | |
449 | t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC); | |
e0f691e1 | 450 | if (!localtime_r(&t, &tm)) |
16801e90 LP |
451 | return -EINVAL; |
452 | ||
e0f691e1 | 453 | if (strftime(header_time, sizeof(header_time), "%h %e %T ", &tm) <= 0) |
16801e90 LP |
454 | return -EINVAL; |
455 | ||
df0ff127 | 456 | xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached()); |
16801e90 | 457 | |
e6a7ec4b LP |
458 | iovec[0] = IOVEC_MAKE_STRING(header_priority); |
459 | iovec[1] = IOVEC_MAKE_STRING(header_time); | |
460 | iovec[2] = IOVEC_MAKE_STRING(program_invocation_short_name); | |
461 | iovec[3] = IOVEC_MAKE_STRING(header_pid); | |
462 | iovec[4] = IOVEC_MAKE_STRING(buffer); | |
16801e90 | 463 | |
c899f8c6 | 464 | /* When using syslog via SOCK_STREAM separate the messages by NUL chars */ |
c31e1495 LP |
465 | if (syslog_is_stream) |
466 | iovec[4].iov_len++; | |
467 | ||
c31e1495 LP |
468 | for (;;) { |
469 | ssize_t n; | |
470 | ||
8f7f7a1b MS |
471 | n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL); |
472 | if (n < 0) | |
c31e1495 LP |
473 | return -errno; |
474 | ||
475 | if (!syslog_is_stream || | |
476 | (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec))) | |
477 | break; | |
478 | ||
479 | IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n); | |
480 | } | |
16801e90 | 481 | |
843d2643 | 482 | return 1; |
16801e90 LP |
483 | } |
484 | ||
485 | static int write_to_kmsg( | |
086891e5 LP |
486 | int level, |
487 | int error, | |
bcf5c276 | 488 | const char *file, |
086891e5 LP |
489 | int line, |
490 | const char *func, | |
086891e5 | 491 | const char *buffer) { |
16801e90 | 492 | |
78158d13 ZJS |
493 | /* Set a ratelimit on the amount of messages logged to /dev/kmsg. This is mostly supposed to be a |
494 | * safety catch for the case where start indiscriminately logging in a loop. It will not catch cases | |
495 | * where we log excessively, but not in a tight loop. | |
496 | * | |
497 | * Note that this ratelimit is per-emitter, so we might still overwhelm /dev/kmsg with multiple | |
498 | * loggers. | |
499 | */ | |
500 | static thread_local RateLimit ratelimit = { 5 * USEC_PER_SEC, 200 }; | |
501 | ||
5ffa8c81 ZJS |
502 | char header_priority[2 + DECIMAL_STR_MAX(int) + 1], |
503 | header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1]; | |
b92bea5d | 504 | struct iovec iovec[5] = {}; |
16801e90 LP |
505 | |
506 | if (kmsg_fd < 0) | |
843d2643 | 507 | return 0; |
16801e90 | 508 | |
78158d13 ZJS |
509 | if (!ratelimit_below(&ratelimit)) |
510 | return 0; | |
511 | ||
5ffa8c81 | 512 | xsprintf(header_priority, "<%i>", level); |
df0ff127 | 513 | xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached()); |
16801e90 | 514 | |
e6a7ec4b LP |
515 | iovec[0] = IOVEC_MAKE_STRING(header_priority); |
516 | iovec[1] = IOVEC_MAKE_STRING(program_invocation_short_name); | |
517 | iovec[2] = IOVEC_MAKE_STRING(header_pid); | |
518 | iovec[3] = IOVEC_MAKE_STRING(buffer); | |
519 | iovec[4] = IOVEC_MAKE_STRING("\n"); | |
16801e90 LP |
520 | |
521 | if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0) | |
522 | return -errno; | |
523 | ||
843d2643 | 524 | return 1; |
16801e90 LP |
525 | } |
526 | ||
086891e5 LP |
527 | static int log_do_header( |
528 | char *header, | |
529 | size_t size, | |
530 | int level, | |
531 | int error, | |
532 | const char *file, int line, const char *func, | |
4b58153d LP |
533 | const char *object_field, const char *object, |
534 | const char *extra_field, const char *extra) { | |
f8e6f4aa | 535 | int r; |
086891e5 | 536 | |
52d86690 ZJS |
537 | error = IS_SYNTHETIC_ERRNO(error) ? 0 : ERRNO_VALUE(error); |
538 | ||
f8e6f4aa ZJS |
539 | r = snprintf(header, size, |
540 | "PRIORITY=%i\n" | |
541 | "SYSLOG_FACILITY=%i\n" | |
542 | "%s%.256s%s" /* CODE_FILE */ | |
543 | "%s%.*i%s" /* CODE_LINE */ | |
544 | "%s%.256s%s" /* CODE_FUNC */ | |
545 | "%s%.*i%s" /* ERRNO */ | |
546 | "%s%.256s%s" /* object */ | |
547 | "%s%.256s%s" /* extra */ | |
548 | "SYSLOG_IDENTIFIER=%.256s\n", | |
549 | LOG_PRI(level), | |
550 | LOG_FAC(level), | |
551 | isempty(file) ? "" : "CODE_FILE=", | |
552 | isempty(file) ? "" : file, | |
553 | isempty(file) ? "" : "\n", | |
554 | line ? "CODE_LINE=" : "", | |
555 | line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */ | |
556 | line ? "\n" : "", | |
557 | isempty(func) ? "" : "CODE_FUNC=", | |
558 | isempty(func) ? "" : func, | |
559 | isempty(func) ? "" : "\n", | |
560 | error ? "ERRNO=" : "", | |
561 | error ? 1 : 0, error, | |
562 | error ? "\n" : "", | |
563 | isempty(object) ? "" : object_field, | |
564 | isempty(object) ? "" : object, | |
565 | isempty(object) ? "" : "\n", | |
566 | isempty(extra) ? "" : extra_field, | |
567 | isempty(extra) ? "" : extra, | |
568 | isempty(extra) ? "" : "\n", | |
569 | program_invocation_short_name); | |
780747da | 570 | assert_raw((size_t) r < size); |
086891e5 | 571 | |
41a79f10 ZJS |
572 | return 0; |
573 | } | |
5ba081b0 | 574 | |
41a79f10 | 575 | static int write_to_journal( |
086891e5 LP |
576 | int level, |
577 | int error, | |
bcf5c276 | 578 | const char *file, |
086891e5 LP |
579 | int line, |
580 | const char *func, | |
581 | const char *object_field, | |
582 | const char *object, | |
4b58153d LP |
583 | const char *extra_field, |
584 | const char *extra, | |
086891e5 | 585 | const char *buffer) { |
41a79f10 ZJS |
586 | |
587 | char header[LINE_MAX]; | |
b92bea5d ZJS |
588 | struct iovec iovec[4] = {}; |
589 | struct msghdr mh = {}; | |
41a79f10 ZJS |
590 | |
591 | if (journal_fd < 0) | |
592 | return 0; | |
593 | ||
4b58153d | 594 | log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object, extra_field, extra); |
5ba081b0 | 595 | |
e6a7ec4b LP |
596 | iovec[0] = IOVEC_MAKE_STRING(header); |
597 | iovec[1] = IOVEC_MAKE_STRING("MESSAGE="); | |
598 | iovec[2] = IOVEC_MAKE_STRING(buffer); | |
599 | iovec[3] = IOVEC_MAKE_STRING("\n"); | |
5ba081b0 | 600 | |
5ba081b0 LP |
601 | mh.msg_iov = iovec; |
602 | mh.msg_iovlen = ELEMENTSOF(iovec); | |
603 | ||
604 | if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0) | |
605 | return -errno; | |
606 | ||
607 | return 1; | |
608 | } | |
609 | ||
93484b47 | 610 | int log_dispatch_internal( |
086891e5 LP |
611 | int level, |
612 | int error, | |
95066a90 | 613 | const char *file, |
086891e5 LP |
614 | int line, |
615 | const char *func, | |
616 | const char *object_field, | |
617 | const char *object, | |
4b58153d | 618 | const char *extra_field, |
4dd09c6a | 619 | const char *extra, |
086891e5 | 620 | char *buffer) { |
843d2643 | 621 | |
780747da | 622 | assert_raw(buffer); |
843d2643 | 623 | |
9fae33d2 | 624 | if (log_target == LOG_TARGET_NULL) |
52d86690 | 625 | return -ERRNO_VALUE(error); |
9fae33d2 | 626 | |
29db5834 | 627 | /* Patch in LOG_DAEMON facility if necessary */ |
7d76f312 | 628 | if ((level & LOG_FACMASK) == 0) |
52d86690 | 629 | level |= log_facility; |
29db5834 | 630 | |
16e4fd87 | 631 | if (open_when_needed) |
e11a5c72 | 632 | (void) log_open(); |
16e4fd87 | 633 | |
9726b29e LP |
634 | do { |
635 | char *e; | |
9499b235 | 636 | int k = 0; |
843d2643 | 637 | |
9726b29e | 638 | buffer += strspn(buffer, NEWLINE); |
843d2643 | 639 | |
9726b29e LP |
640 | if (buffer[0] == 0) |
641 | break; | |
843d2643 | 642 | |
9726b29e LP |
643 | if ((e = strpbrk(buffer, NEWLINE))) |
644 | *(e++) = 0; | |
843d2643 | 645 | |
5b5688af ZJS |
646 | if (IN_SET(log_target, LOG_TARGET_AUTO, |
647 | LOG_TARGET_JOURNAL_OR_KMSG, | |
648 | LOG_TARGET_JOURNAL)) { | |
5ba081b0 | 649 | |
4b58153d | 650 | k = write_to_journal(level, error, file, line, func, object_field, object, extra_field, extra, buffer); |
e38b8a40 LP |
651 | if (k < 0 && k != -EAGAIN) |
652 | log_close_journal(); | |
5ba081b0 LP |
653 | } |
654 | ||
5b5688af ZJS |
655 | if (IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG, |
656 | LOG_TARGET_SYSLOG)) { | |
9726b29e | 657 | |
4b58153d | 658 | k = write_to_syslog(level, error, file, line, func, buffer); |
e38b8a40 LP |
659 | if (k < 0 && k != -EAGAIN) |
660 | log_close_syslog(); | |
9726b29e LP |
661 | } |
662 | ||
9499b235 | 663 | if (k <= 0 && |
5b5688af | 664 | IN_SET(log_target, LOG_TARGET_AUTO, |
5b5688af ZJS |
665 | LOG_TARGET_SYSLOG_OR_KMSG, |
666 | LOG_TARGET_JOURNAL_OR_KMSG, | |
667 | LOG_TARGET_KMSG)) { | |
9726b29e | 668 | |
e38b8a40 LP |
669 | if (k < 0) |
670 | log_open_kmsg(); | |
671 | ||
4b58153d | 672 | k = write_to_kmsg(level, error, file, line, func, buffer); |
4e7bc3f3 LP |
673 | if (k < 0) { |
674 | log_close_kmsg(); | |
e11a5c72 | 675 | (void) log_open_console(); |
bf371116 | 676 | } |
9726b29e LP |
677 | } |
678 | ||
bf371116 | 679 | if (k <= 0) |
4b58153d | 680 | (void) write_to_console(level, error, file, line, func, buffer); |
9726b29e LP |
681 | |
682 | buffer = e; | |
683 | } while (buffer); | |
684 | ||
16e4fd87 LP |
685 | if (open_when_needed) |
686 | log_close(); | |
687 | ||
52d86690 | 688 | return -ERRNO_VALUE(error); |
843d2643 LP |
689 | } |
690 | ||
2149e37c | 691 | int log_dump_internal( |
ff524019 ZJS |
692 | int level, |
693 | int error, | |
694 | const char *file, | |
695 | int line, | |
696 | const char *func, | |
697 | char *buffer) { | |
2149e37c | 698 | |
ff524019 | 699 | LogRealm realm = LOG_REALM_REMOVE_LEVEL(level); |
5c0aa72a | 700 | PROTECT_ERRNO; |
2149e37c LP |
701 | |
702 | /* This modifies the buffer... */ | |
703 | ||
ff524019 | 704 | if (_likely_(LOG_PRI(level) > log_max_level[realm])) |
52d86690 | 705 | return -ERRNO_VALUE(error); |
2149e37c | 706 | |
93484b47 | 707 | return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer); |
2149e37c LP |
708 | } |
709 | ||
ff524019 | 710 | int log_internalv_realm( |
086891e5 LP |
711 | int level, |
712 | int error, | |
bcf5c276 | 713 | const char *file, |
086891e5 LP |
714 | int line, |
715 | const char *func, | |
716 | const char *format, | |
717 | va_list ap) { | |
16801e90 | 718 | |
ff524019 | 719 | LogRealm realm = LOG_REALM_REMOVE_LEVEL(level); |
addab137 | 720 | char buffer[LINE_MAX]; |
ff524019 | 721 | PROTECT_ERRNO; |
16801e90 | 722 | |
ff524019 | 723 | if (_likely_(LOG_PRI(level) > log_max_level[realm])) |
52d86690 | 724 | return -ERRNO_VALUE(error); |
16801e90 | 725 | |
b29f6480 | 726 | /* Make sure that %m maps to the specified error (or "Success"). */ |
52d86690 | 727 | errno = ERRNO_VALUE(error); |
086891e5 | 728 | |
4ad2b562 | 729 | (void) vsnprintf(buffer, sizeof buffer, format, ap); |
843d2643 | 730 | |
93484b47 | 731 | return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer); |
185986c6 | 732 | } |
16801e90 | 733 | |
ff524019 | 734 | int log_internal_realm( |
086891e5 LP |
735 | int level, |
736 | int error, | |
bcf5c276 | 737 | const char *file, |
086891e5 LP |
738 | int line, |
739 | const char *func, | |
740 | const char *format, ...) { | |
17a94911 | 741 | |
17a94911 | 742 | va_list ap; |
bf371116 | 743 | int r; |
17a94911 LP |
744 | |
745 | va_start(ap, format); | |
ff524019 | 746 | r = log_internalv_realm(level, error, file, line, func, format, ap); |
17a94911 LP |
747 | va_end(ap); |
748 | ||
749 | return r; | |
750 | } | |
751 | ||
f6d6d532 | 752 | int log_object_internalv( |
086891e5 LP |
753 | int level, |
754 | int error, | |
bcf5c276 | 755 | const char *file, |
086891e5 LP |
756 | int line, |
757 | const char *func, | |
758 | const char *object_field, | |
759 | const char *object, | |
4b58153d LP |
760 | const char *extra_field, |
761 | const char *extra, | |
086891e5 LP |
762 | const char *format, |
763 | va_list ap) { | |
fdf9f9bb | 764 | |
5c0aa72a | 765 | PROTECT_ERRNO; |
f2341e0a | 766 | char *buffer, *b; |
fdf9f9bb | 767 | |
ff524019 | 768 | if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD])) |
52d86690 | 769 | return -ERRNO_VALUE(error); |
fdf9f9bb | 770 | |
d1a1f0aa | 771 | /* Make sure that %m maps to the specified error (or "Success"). */ |
52d86690 | 772 | errno = ERRNO_VALUE(error); |
086891e5 | 773 | |
f2341e0a LP |
774 | /* Prepend the object name before the message */ |
775 | if (object) { | |
776 | size_t n; | |
777 | ||
778 | n = strlen(object); | |
1741b25c | 779 | buffer = newa(char, n + 2 + LINE_MAX); |
f2341e0a | 780 | b = stpcpy(stpcpy(buffer, object), ": "); |
1741b25c EV |
781 | } else |
782 | b = buffer = newa(char, LINE_MAX); | |
f2341e0a | 783 | |
4ad2b562 | 784 | (void) vsnprintf(b, LINE_MAX, format, ap); |
fdf9f9bb | 785 | |
93484b47 ZJS |
786 | return log_dispatch_internal(level, error, file, line, func, |
787 | object_field, object, extra_field, extra, buffer); | |
fdf9f9bb ZJS |
788 | } |
789 | ||
79008bdd | 790 | int log_object_internal( |
086891e5 LP |
791 | int level, |
792 | int error, | |
bcf5c276 | 793 | const char *file, |
086891e5 LP |
794 | int line, |
795 | const char *func, | |
796 | const char *object_field, | |
797 | const char *object, | |
4b58153d LP |
798 | const char *extra_field, |
799 | const char *extra, | |
086891e5 | 800 | const char *format, ...) { |
fdf9f9bb | 801 | |
fdf9f9bb | 802 | va_list ap; |
bf371116 | 803 | int r; |
fdf9f9bb ZJS |
804 | |
805 | va_start(ap, format); | |
4b58153d | 806 | r = log_object_internalv(level, error, file, line, func, object_field, object, extra_field, extra, format, ap); |
fdf9f9bb ZJS |
807 | va_end(ap); |
808 | ||
809 | return r; | |
810 | } | |
811 | ||
086891e5 LP |
812 | static void log_assert( |
813 | int level, | |
814 | const char *text, | |
815 | const char *file, | |
816 | int line, | |
817 | const char *func, | |
818 | const char *format) { | |
819 | ||
addab137 | 820 | static char buffer[LINE_MAX]; |
ff524019 | 821 | LogRealm realm = LOG_REALM_REMOVE_LEVEL(level); |
185986c6 | 822 | |
ff524019 | 823 | if (_likely_(LOG_PRI(level) > log_max_level[realm])) |
50f72bca ZJS |
824 | return; |
825 | ||
bcfce235 | 826 | DISABLE_WARNING_FORMAT_NONLITERAL; |
4ad2b562 | 827 | (void) snprintf(buffer, sizeof buffer, format, text, file, line, func); |
bcfce235 | 828 | REENABLE_WARNING; |
185986c6 | 829 | |
185986c6 LP |
830 | log_abort_msg = buffer; |
831 | ||
93484b47 | 832 | log_dispatch_internal(level, 0, file, line, func, NULL, NULL, NULL, NULL, buffer); |
5899f3b7 | 833 | } |
34f0e866 | 834 | |
848e863a | 835 | _noreturn_ void log_assert_failed_realm( |
ff524019 ZJS |
836 | LogRealm realm, |
837 | const char *text, | |
838 | const char *file, | |
839 | int line, | |
840 | const char *func) { | |
e11a5c72 | 841 | (void) log_open(); |
ff524019 ZJS |
842 | log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func, |
843 | "Assertion '%s' failed at %s:%u, function %s(). Aborting."); | |
80514f9c | 844 | abort(); |
b7f33638 MS |
845 | } |
846 | ||
848e863a | 847 | _noreturn_ void log_assert_failed_unreachable_realm( |
ff524019 ZJS |
848 | LogRealm realm, |
849 | const char *text, | |
850 | const char *file, | |
851 | int line, | |
852 | const char *func) { | |
e11a5c72 | 853 | (void) log_open(); |
ff524019 ZJS |
854 | log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func, |
855 | "Code should not be reached '%s' at %s:%u, function %s(). Aborting."); | |
80514f9c LP |
856 | abort(); |
857 | } | |
858 | ||
ff524019 ZJS |
859 | void log_assert_failed_return_realm( |
860 | LogRealm realm, | |
861 | const char *text, | |
862 | const char *file, | |
863 | int line, | |
864 | const char *func) { | |
e5ca092c | 865 | PROTECT_ERRNO; |
ff524019 ZJS |
866 | log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_DEBUG), text, file, line, func, |
867 | "Assertion '%s' failed at %s:%u, function %s(). Ignoring."); | |
b7f33638 MS |
868 | } |
869 | ||
ff524019 | 870 | int log_oom_internal(LogRealm realm, const char *file, int line, const char *func) { |
7558e10c LP |
871 | return log_internal_realm(LOG_REALM_PLUS_LEVEL(realm, LOG_ERR), |
872 | ENOMEM, file, line, func, "Out of memory."); | |
6dc1e7e0 MS |
873 | } |
874 | ||
8a03c9ef ZJS |
875 | int log_format_iovec( |
876 | struct iovec *iovec, | |
d3070fbd LP |
877 | size_t iovec_len, |
878 | size_t *n, | |
8a03c9ef ZJS |
879 | bool newline_separator, |
880 | int error, | |
881 | const char *format, | |
882 | va_list ap) { | |
883 | ||
884 | static const char nl = '\n'; | |
885 | ||
886 | while (format && *n + 1 < iovec_len) { | |
887 | va_list aq; | |
888 | char *m; | |
889 | int r; | |
890 | ||
891 | /* We need to copy the va_list structure, | |
892 | * since vasprintf() leaves it afterwards at | |
893 | * an undefined location */ | |
894 | ||
52d86690 | 895 | errno = ERRNO_VALUE(error); |
8a03c9ef ZJS |
896 | |
897 | va_copy(aq, ap); | |
898 | r = vasprintf(&m, format, aq); | |
899 | va_end(aq); | |
900 | if (r < 0) | |
901 | return -EINVAL; | |
902 | ||
903 | /* Now, jump enough ahead, so that we point to | |
904 | * the next format string */ | |
905 | VA_FORMAT_ADVANCE(format, ap); | |
906 | ||
e6a7ec4b | 907 | iovec[(*n)++] = IOVEC_MAKE_STRING(m); |
8a03c9ef ZJS |
908 | |
909 | if (newline_separator) { | |
5cfa2c3d | 910 | iovec[*n] = IOVEC_MAKE((char *)&nl, 1); |
8a03c9ef ZJS |
911 | (*n)++; |
912 | } | |
913 | ||
914 | format = va_arg(ap, char *); | |
915 | } | |
916 | return 0; | |
917 | } | |
918 | ||
877d54e9 LP |
919 | int log_struct_internal( |
920 | int level, | |
086891e5 | 921 | int error, |
877d54e9 LP |
922 | const char *file, |
923 | int line, | |
924 | const char *func, | |
925 | const char *format, ...) { | |
926 | ||
e6a7ec4b | 927 | LogRealm realm = LOG_REALM_REMOVE_LEVEL(level); |
bf371116 LP |
928 | char buf[LINE_MAX]; |
929 | bool found = false; | |
5c0aa72a | 930 | PROTECT_ERRNO; |
877d54e9 | 931 | va_list ap; |
bf371116 | 932 | |
52d86690 ZJS |
933 | if (_likely_(LOG_PRI(level) > log_max_level[realm]) || |
934 | log_target == LOG_TARGET_NULL) | |
935 | return -ERRNO_VALUE(error); | |
877d54e9 LP |
936 | |
937 | if ((level & LOG_FACMASK) == 0) | |
52d86690 | 938 | level |= log_facility; |
877d54e9 | 939 | |
16e4fd87 LP |
940 | if (IN_SET(log_target, |
941 | LOG_TARGET_AUTO, | |
942 | LOG_TARGET_JOURNAL_OR_KMSG, | |
943 | LOG_TARGET_JOURNAL)) { | |
944 | ||
945 | if (open_when_needed) | |
946 | log_open_journal(); | |
947 | ||
948 | if (journal_fd >= 0) { | |
949 | char header[LINE_MAX]; | |
950 | struct iovec iovec[17] = {}; | |
d3070fbd | 951 | size_t n = 0, i; |
16e4fd87 LP |
952 | int r; |
953 | struct msghdr mh = { | |
954 | .msg_iov = iovec, | |
955 | }; | |
956 | bool fallback = false; | |
957 | ||
52d86690 ZJS |
958 | /* If the journal is available do structured logging. |
959 | * Do not report the errno if it is synthetic. */ | |
16e4fd87 LP |
960 | log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL); |
961 | iovec[n++] = IOVEC_MAKE_STRING(header); | |
962 | ||
963 | va_start(ap, format); | |
964 | r = log_format_iovec(iovec, ELEMENTSOF(iovec), &n, true, error, format, ap); | |
965 | if (r < 0) | |
966 | fallback = true; | |
967 | else { | |
968 | mh.msg_iovlen = n; | |
969 | (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL); | |
970 | } | |
877d54e9 | 971 | |
16e4fd87 LP |
972 | va_end(ap); |
973 | for (i = 1; i < n; i += 2) | |
974 | free(iovec[i].iov_base); | |
877d54e9 | 975 | |
16e4fd87 LP |
976 | if (!fallback) { |
977 | if (open_when_needed) | |
978 | log_close(); | |
877d54e9 | 979 | |
52d86690 | 980 | return -ERRNO_VALUE(error); |
16e4fd87 LP |
981 | } |
982 | } | |
bf371116 | 983 | } |
877d54e9 | 984 | |
bf371116 | 985 | /* Fallback if journal logging is not available or didn't work. */ |
6357ac66 | 986 | |
bf371116 LP |
987 | va_start(ap, format); |
988 | while (format) { | |
989 | va_list aq; | |
877d54e9 | 990 | |
52d86690 | 991 | errno = ERRNO_VALUE(error); |
877d54e9 | 992 | |
bf371116 | 993 | va_copy(aq, ap); |
4ad2b562 | 994 | (void) vsnprintf(buf, sizeof buf, format, aq); |
bf371116 | 995 | va_end(aq); |
963ddb91 | 996 | |
bf371116 LP |
997 | if (startswith(buf, "MESSAGE=")) { |
998 | found = true; | |
999 | break; | |
877d54e9 | 1000 | } |
877d54e9 | 1001 | |
bf371116 LP |
1002 | VA_FORMAT_ADVANCE(format, ap); |
1003 | ||
1004 | format = va_arg(ap, char *); | |
877d54e9 | 1005 | } |
bf371116 | 1006 | va_end(ap); |
877d54e9 | 1007 | |
16e4fd87 LP |
1008 | if (!found) { |
1009 | if (open_when_needed) | |
1010 | log_close(); | |
1011 | ||
52d86690 | 1012 | return -ERRNO_VALUE(error); |
16e4fd87 | 1013 | } |
bf371116 | 1014 | |
93484b47 | 1015 | return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buf + 8); |
877d54e9 LP |
1016 | } |
1017 | ||
915b1d01 LP |
1018 | int log_struct_iovec_internal( |
1019 | int level, | |
1020 | int error, | |
1021 | const char *file, | |
1022 | int line, | |
1023 | const char *func, | |
1024 | const struct iovec input_iovec[], | |
1025 | size_t n_input_iovec) { | |
1026 | ||
1027 | LogRealm realm = LOG_REALM_REMOVE_LEVEL(level); | |
1028 | PROTECT_ERRNO; | |
1029 | size_t i; | |
1030 | char *m; | |
1031 | ||
52d86690 ZJS |
1032 | if (_likely_(LOG_PRI(level) > log_max_level[realm]) || |
1033 | log_target == LOG_TARGET_NULL) | |
1034 | return -ERRNO_VALUE(error); | |
915b1d01 LP |
1035 | |
1036 | if ((level & LOG_FACMASK) == 0) | |
52d86690 | 1037 | level |= log_facility; |
915b1d01 LP |
1038 | |
1039 | if (IN_SET(log_target, LOG_TARGET_AUTO, | |
1040 | LOG_TARGET_JOURNAL_OR_KMSG, | |
1041 | LOG_TARGET_JOURNAL) && | |
1042 | journal_fd >= 0) { | |
1043 | ||
1044 | struct iovec iovec[1 + n_input_iovec*2]; | |
1045 | char header[LINE_MAX]; | |
1046 | struct msghdr mh = { | |
1047 | .msg_iov = iovec, | |
1048 | .msg_iovlen = 1 + n_input_iovec*2, | |
1049 | }; | |
1050 | ||
1051 | log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL); | |
1052 | iovec[0] = IOVEC_MAKE_STRING(header); | |
1053 | ||
1054 | for (i = 0; i < n_input_iovec; i++) { | |
1055 | iovec[1+i*2] = input_iovec[i]; | |
1056 | iovec[1+i*2+1] = IOVEC_MAKE_STRING("\n"); | |
1057 | } | |
1058 | ||
1059 | if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) >= 0) | |
52d86690 | 1060 | return -ERRNO_VALUE(error); |
915b1d01 LP |
1061 | } |
1062 | ||
d27b725a LP |
1063 | for (i = 0; i < n_input_iovec; i++) |
1064 | if (memory_startswith(input_iovec[i].iov_base, input_iovec[i].iov_len, "MESSAGE=")) | |
915b1d01 | 1065 | break; |
915b1d01 LP |
1066 | |
1067 | if (_unlikely_(i >= n_input_iovec)) /* Couldn't find MESSAGE=? */ | |
52d86690 | 1068 | return -ERRNO_VALUE(error); |
915b1d01 | 1069 | |
fbd0b64f LP |
1070 | m = strndupa(input_iovec[i].iov_base + STRLEN("MESSAGE="), |
1071 | input_iovec[i].iov_len - STRLEN("MESSAGE=")); | |
915b1d01 LP |
1072 | |
1073 | return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, m); | |
1074 | } | |
1075 | ||
34f0e866 LP |
1076 | int log_set_target_from_string(const char *e) { |
1077 | LogTarget t; | |
1078 | ||
5ba081b0 LP |
1079 | t = log_target_from_string(e); |
1080 | if (t < 0) | |
34f0e866 LP |
1081 | return -EINVAL; |
1082 | ||
1083 | log_set_target(t); | |
1084 | return 0; | |
1085 | } | |
1086 | ||
ff524019 | 1087 | int log_set_max_level_from_string_realm(LogRealm realm, const char *e) { |
34f0e866 LP |
1088 | int t; |
1089 | ||
5ba081b0 LP |
1090 | t = log_level_from_string(e); |
1091 | if (t < 0) | |
737af734 | 1092 | return -EINVAL; |
34f0e866 | 1093 | |
ff524019 | 1094 | log_set_max_level_realm(realm, t); |
34f0e866 LP |
1095 | return 0; |
1096 | } | |
1097 | ||
96287a49 | 1098 | static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
1de1c9c3 LP |
1099 | |
1100 | /* | |
1101 | * The systemd.log_xyz= settings are parsed by all tools, and | |
1102 | * so is "debug". | |
1103 | * | |
5e07a79e LP |
1104 | * However, "quiet" is only parsed by PID 1, and only turns of |
1105 | * status output to /dev/console, but does not alter the log | |
1106 | * level. | |
1de1c9c3 LP |
1107 | */ |
1108 | ||
1109 | if (streq(key, "debug") && !value) | |
1110 | log_set_max_level(LOG_DEBUG); | |
1111 | ||
1d84ad94 LP |
1112 | else if (proc_cmdline_key_streq(key, "systemd.log_target")) { |
1113 | ||
1114 | if (proc_cmdline_value_missing(key, value)) | |
1115 | return 0; | |
1de1c9c3 LP |
1116 | |
1117 | if (log_set_target_from_string(value) < 0) | |
1118 | log_warning("Failed to parse log target '%s'. Ignoring.", value); | |
1119 | ||
1d84ad94 LP |
1120 | } else if (proc_cmdline_key_streq(key, "systemd.log_level")) { |
1121 | ||
1122 | if (proc_cmdline_value_missing(key, value)) | |
1123 | return 0; | |
1de1c9c3 LP |
1124 | |
1125 | if (log_set_max_level_from_string(value) < 0) | |
1126 | log_warning("Failed to parse log level '%s'. Ignoring.", value); | |
1127 | ||
1d84ad94 | 1128 | } else if (proc_cmdline_key_streq(key, "systemd.log_color")) { |
1de1c9c3 | 1129 | |
1d84ad94 | 1130 | if (log_show_color_from_string(value ?: "1") < 0) |
1de1c9c3 LP |
1131 | log_warning("Failed to parse log color setting '%s'. Ignoring.", value); |
1132 | ||
1d84ad94 | 1133 | } else if (proc_cmdline_key_streq(key, "systemd.log_location")) { |
1de1c9c3 | 1134 | |
1d84ad94 | 1135 | if (log_show_location_from_string(value ?: "1") < 0) |
1de1c9c3 | 1136 | log_warning("Failed to parse log location setting '%s'. Ignoring.", value); |
c5673ed0 DS |
1137 | |
1138 | } else if (proc_cmdline_key_streq(key, "systemd.log_time")) { | |
1139 | ||
1140 | if (log_show_time_from_string(value ?: "1") < 0) | |
1141 | log_warning("Failed to parse log time setting '%s'. Ignoring.", value); | |
1142 | ||
1de1c9c3 LP |
1143 | } |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
ff524019 | 1148 | void log_parse_environment_realm(LogRealm realm) { |
5f4a8823 ZJS |
1149 | if (getpid_cached() == 1 || get_ctty_devnr(0, NULL) < 0) |
1150 | /* Only try to read the command line in daemons. We assume that anything that has a | |
1151 | * controlling tty is user stuff. For PID1 we do a special check in case it hasn't | |
1152 | * closed the console yet. */ | |
1d84ad94 | 1153 | (void) proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
34f0e866 | 1154 | |
41d1f469 FB |
1155 | log_parse_environment_cli_realm(realm); |
1156 | } | |
1157 | ||
1158 | void log_parse_environment_cli_realm(LogRealm realm) { | |
1159 | /* Do not call from library code. */ | |
1160 | ||
1161 | const char *e; | |
1162 | ||
a99e002c | 1163 | e = getenv("SYSTEMD_LOG_TARGET"); |
88fae6e0 | 1164 | if (e && log_set_target_from_string(e) < 0) |
f0ea29ea | 1165 | log_warning("Failed to parse log target '%s'. Ignoring.", e); |
34f0e866 | 1166 | |
a99e002c | 1167 | e = getenv("SYSTEMD_LOG_LEVEL"); |
ff524019 | 1168 | if (e && log_set_max_level_from_string_realm(realm, e) < 0) |
f0ea29ea | 1169 | log_warning("Failed to parse log level '%s'. Ignoring.", e); |
bbe63281 | 1170 | |
a99e002c | 1171 | e = getenv("SYSTEMD_LOG_COLOR"); |
88fae6e0 | 1172 | if (e && log_show_color_from_string(e) < 0) |
df2452c5 | 1173 | log_warning("Failed to parse log color '%s'. Ignoring.", e); |
bbe63281 | 1174 | |
a99e002c | 1175 | e = getenv("SYSTEMD_LOG_LOCATION"); |
88fae6e0 | 1176 | if (e && log_show_location_from_string(e) < 0) |
df2452c5 | 1177 | log_warning("Failed to parse log location '%s'. Ignoring.", e); |
c5673ed0 DS |
1178 | |
1179 | e = getenv("SYSTEMD_LOG_TIME"); | |
1180 | if (e && log_show_time_from_string(e) < 0) | |
1181 | log_warning("Failed to parse log time '%s'. Ignoring.", e); | |
34f0e866 LP |
1182 | } |
1183 | ||
1adf1049 LP |
1184 | LogTarget log_get_target(void) { |
1185 | return log_target; | |
1186 | } | |
1187 | ||
ff524019 ZJS |
1188 | int log_get_max_level_realm(LogRealm realm) { |
1189 | return log_max_level[realm]; | |
1adf1049 LP |
1190 | } |
1191 | ||
bbe63281 LP |
1192 | void log_show_color(bool b) { |
1193 | show_color = b; | |
1194 | } | |
1195 | ||
b1e90ec5 ZJS |
1196 | bool log_get_show_color(void) { |
1197 | return show_color; | |
1198 | } | |
1199 | ||
bbe63281 LP |
1200 | void log_show_location(bool b) { |
1201 | show_location = b; | |
1202 | } | |
1203 | ||
b1e90ec5 ZJS |
1204 | bool log_get_show_location(void) { |
1205 | return show_location; | |
1206 | } | |
1207 | ||
c5673ed0 DS |
1208 | void log_show_time(bool b) { |
1209 | show_time = b; | |
1210 | } | |
1211 | ||
1212 | bool log_get_show_time(void) { | |
1213 | return show_time; | |
1214 | } | |
1215 | ||
bbe63281 LP |
1216 | int log_show_color_from_string(const char *e) { |
1217 | int t; | |
1218 | ||
5ba081b0 LP |
1219 | t = parse_boolean(e); |
1220 | if (t < 0) | |
1221 | return t; | |
bbe63281 LP |
1222 | |
1223 | log_show_color(t); | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | int log_show_location_from_string(const char *e) { | |
1228 | int t; | |
1229 | ||
5ba081b0 LP |
1230 | t = parse_boolean(e); |
1231 | if (t < 0) | |
1232 | return t; | |
bbe63281 LP |
1233 | |
1234 | log_show_location(t); | |
1235 | return 0; | |
1236 | } | |
1237 | ||
c5673ed0 DS |
1238 | int log_show_time_from_string(const char *e) { |
1239 | int t; | |
1240 | ||
1241 | t = parse_boolean(e); | |
1242 | if (t < 0) | |
1243 | return t; | |
1244 | ||
1245 | log_show_time(t); | |
1246 | return 0; | |
1247 | } | |
1248 | ||
81270860 | 1249 | bool log_on_console(void) { |
5b5688af ZJS |
1250 | if (IN_SET(log_target, LOG_TARGET_CONSOLE, |
1251 | LOG_TARGET_CONSOLE_PREFIXED)) | |
81270860 LP |
1252 | return true; |
1253 | ||
1254 | return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0; | |
1255 | } | |
1256 | ||
2c5859af | 1257 | static const char *const log_target_table[_LOG_TARGET_MAX] = { |
34f0e866 | 1258 | [LOG_TARGET_CONSOLE] = "console", |
aca83a53 | 1259 | [LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed", |
34f0e866 | 1260 | [LOG_TARGET_KMSG] = "kmsg", |
5ba081b0 LP |
1261 | [LOG_TARGET_JOURNAL] = "journal", |
1262 | [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg", | |
1263 | [LOG_TARGET_SYSLOG] = "syslog", | |
843d2643 | 1264 | [LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg", |
5ba081b0 | 1265 | [LOG_TARGET_AUTO] = "auto", |
6c347d50 | 1266 | [LOG_TARGET_NULL] = "null", |
34f0e866 LP |
1267 | }; |
1268 | ||
1269 | DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget); | |
4daf54a8 ZJS |
1270 | |
1271 | void log_received_signal(int level, const struct signalfd_siginfo *si) { | |
a6ab2365 LP |
1272 | assert(si); |
1273 | ||
1274 | if (pid_is_valid(si->ssi_pid)) { | |
4daf54a8 ZJS |
1275 | _cleanup_free_ char *p = NULL; |
1276 | ||
a6ab2365 | 1277 | (void) get_process_comm(si->ssi_pid, &p); |
4daf54a8 ZJS |
1278 | |
1279 | log_full(level, | |
1fa2f38f | 1280 | "Received SIG%s from PID %"PRIu32" (%s).", |
4daf54a8 ZJS |
1281 | signal_to_string(si->ssi_signo), |
1282 | si->ssi_pid, strna(p)); | |
1283 | } else | |
1284 | log_full(level, | |
1285 | "Received SIG%s.", | |
1286 | signal_to_string(si->ssi_signo)); | |
4daf54a8 | 1287 | } |
c1dc6153 | 1288 | |
158350e8 LP |
1289 | int log_syntax_internal( |
1290 | const char *unit, | |
1291 | int level, | |
1292 | const char *config_file, | |
1293 | unsigned config_line, | |
1294 | int error, | |
1295 | const char *file, | |
1296 | int line, | |
1297 | const char *func, | |
1298 | const char *format, ...) { | |
1299 | ||
1300 | PROTECT_ERRNO; | |
1301 | char buffer[LINE_MAX]; | |
158350e8 | 1302 | va_list ap; |
c2dec702 | 1303 | const char *unit_fmt = NULL; |
158350e8 | 1304 | |
52d86690 ZJS |
1305 | if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]) || |
1306 | log_target == LOG_TARGET_NULL) | |
1307 | return -ERRNO_VALUE(error); | |
158350e8 | 1308 | |
ee96382f | 1309 | errno = ERRNO_VALUE(error); |
158350e8 LP |
1310 | |
1311 | va_start(ap, format); | |
4ad2b562 | 1312 | (void) vsnprintf(buffer, sizeof buffer, format, ap); |
158350e8 LP |
1313 | va_end(ap); |
1314 | ||
1315 | if (unit) | |
df0ff127 | 1316 | unit_fmt = getpid_cached() == 1 ? "UNIT=%s" : "USER_UNIT=%s"; |
c2dec702 | 1317 | |
bdc34268 ZJS |
1318 | if (config_file) { |
1319 | if (config_line > 0) | |
1320 | return log_struct_internal( | |
1321 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
1322 | error, | |
1323 | file, line, func, | |
1324 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
1325 | "CONFIG_FILE=%s", config_file, | |
1326 | "CONFIG_LINE=%u", config_line, | |
1327 | LOG_MESSAGE("%s:%u: %s", config_file, config_line, buffer), | |
1328 | unit_fmt, unit, | |
1329 | NULL); | |
1330 | else | |
1331 | return log_struct_internal( | |
1332 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
1333 | error, | |
1334 | file, line, func, | |
1335 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
1336 | "CONFIG_FILE=%s", config_file, | |
1337 | LOG_MESSAGE("%s: %s", config_file, buffer), | |
1338 | unit_fmt, unit, | |
1339 | NULL); | |
1340 | } else if (unit) | |
6bfb1daf ZJS |
1341 | return log_struct_internal( |
1342 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
1343 | error, | |
1344 | file, line, func, | |
1345 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
1346 | LOG_MESSAGE("%s: %s", unit, buffer), | |
1347 | unit_fmt, unit, | |
1348 | NULL); | |
1349 | else | |
1350 | return log_struct_internal( | |
1351 | LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level), | |
1352 | error, | |
1353 | file, line, func, | |
1354 | "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR, | |
1355 | LOG_MESSAGE("%s", buffer), | |
1356 | NULL); | |
158350e8 | 1357 | } |
48a601fe | 1358 | |
d04ce5a9 LP |
1359 | int log_syntax_invalid_utf8_internal( |
1360 | const char *unit, | |
1361 | int level, | |
1362 | const char *config_file, | |
1363 | unsigned config_line, | |
1364 | const char *file, | |
1365 | int line, | |
1366 | const char *func, | |
1367 | const char *rvalue) { | |
1368 | ||
1369 | _cleanup_free_ char *p = NULL; | |
1370 | ||
1371 | if (rvalue) | |
1372 | p = utf8_escape_invalid(rvalue); | |
1373 | ||
1374 | log_syntax_internal(unit, level, config_file, config_line, 0, file, line, func, | |
1375 | "String is not UTF-8 clean, ignoring assignment: %s", strna(p)); | |
1376 | ||
1377 | return -EINVAL; | |
1378 | } | |
1379 | ||
16e4fd87 LP |
1380 | void log_set_upgrade_syslog_to_journal(bool b) { |
1381 | upgrade_syslog_to_journal = b; | |
6fdb8de4 LP |
1382 | |
1383 | /* Make the change effective immediately */ | |
1384 | if (b) { | |
1385 | if (log_target == LOG_TARGET_SYSLOG) | |
1386 | log_target = LOG_TARGET_JOURNAL; | |
1387 | else if (log_target == LOG_TARGET_SYSLOG_OR_KMSG) | |
1388 | log_target = LOG_TARGET_JOURNAL_OR_KMSG; | |
1389 | } | |
16e4fd87 LP |
1390 | } |
1391 | ||
48a601fe LP |
1392 | void log_set_always_reopen_console(bool b) { |
1393 | always_reopen_console = b; | |
1394 | } | |
16e4fd87 LP |
1395 | |
1396 | void log_set_open_when_needed(bool b) { | |
1397 | open_when_needed = b; | |
1398 | } | |
dccca82b | 1399 | |
adf47c91 LP |
1400 | void log_set_prohibit_ipc(bool b) { |
1401 | prohibit_ipc = b; | |
1402 | } | |
1403 | ||
dccca82b LP |
1404 | int log_emergency_level(void) { |
1405 | /* Returns the log level to use for log_emergency() logging. We use LOG_EMERG only when we are PID 1, as only | |
1406 | * then the system of the whole system is obviously affected. */ | |
1407 | ||
1408 | return getpid_cached() == 1 ? LOG_EMERG : LOG_ERR; | |
1409 | } | |
17cac366 LP |
1410 | |
1411 | int log_dup_console(void) { | |
1412 | int copy; | |
1413 | ||
1414 | /* Duplicate the fd we use for fd logging if it's < 3 and use the copy from now on. This call is useful | |
1415 | * whenever we want to continue logging through the original fd, but want to rearrange stderr. */ | |
1416 | ||
1417 | if (console_fd >= 3) | |
1418 | return 0; | |
1419 | ||
1420 | copy = fcntl(console_fd, F_DUPFD_CLOEXEC, 3); | |
1421 | if (copy < 0) | |
1422 | return -errno; | |
1423 | ||
1424 | console_fd = copy; | |
1425 | return 0; | |
1426 | } | |
6bf3c61c LP |
1427 | |
1428 | void log_setup_service(void) { | |
1429 | /* Sets up logging the way it is most appropriate for running a program as a service. Note that using this | |
1430 | * doesn't make the binary unsuitable for invocation on the command line, as log output will still go to the | |
1431 | * terminal if invoked interactively. */ | |
1432 | ||
1433 | log_set_target(LOG_TARGET_AUTO); | |
1434 | log_parse_environment(); | |
e11a5c72 | 1435 | (void) log_open(); |
6bf3c61c | 1436 | } |
41d1f469 FB |
1437 | |
1438 | void log_setup_cli(void) { | |
1439 | /* Sets up logging the way it is most appropriate for running a program as a CLI utility. */ | |
1440 | ||
1441 | log_show_color(true); | |
1442 | log_parse_environment_cli(); | |
1443 | (void) log_open(); | |
1444 | } |