117
122
static int create_log_socket(int type) {
121
if ((fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0)) < 0)
124
/* Make sure we don't block for more than 5s when talking to
126
timeval_store(&tv, SYSLOG_TIMEOUT_USEC);
127
if (setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)) < 0) {
128
close_nointr_nofail(fd);
125
/* All output to the syslog/journal fds we do asynchronously,
126
* and if the buffers are full we just drop the messages */
128
fd = socket(AF_UNIX, type|SOCK_CLOEXEC|SOCK_NONBLOCK, 0);
132
fd_inc_sndbuf(fd, SNDBUF_SIZE);
135
137
static int log_open_syslog(void) {
138
struct sockaddr_un un;
138
union sockaddr_union sa;
142
141
if (syslog_fd >= 0)
185
void log_close_journal(void) {
190
close_nointr_nofail(journal_fd);
194
static int log_open_journal(void) {
195
union sockaddr_union sa;
201
journal_fd = create_log_socket(SOCK_DGRAM);
202
if (journal_fd < 0) {
208
sa.un.sun_family = AF_UNIX;
209
strncpy(sa.un.sun_path, "/run/systemd/journal/socket", sizeof(sa.un.sun_path));
211
if (connect(journal_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) {
216
log_debug("Successfully opened journal for logging.");
222
log_debug("Failed to open journal for logging: %s", strerror(-r));
184
226
int log_open(void) {
201
244
isatty(STDERR_FILENO) <= 0) {
203
246
if (log_target == LOG_TARGET_AUTO ||
204
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
205
log_target == LOG_TARGET_SYSLOG)
206
if ((r = log_open_syslog()) >= 0) {
247
log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
248
log_target == LOG_TARGET_JOURNAL) {
249
r = log_open_journal();
257
if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
258
log_target == LOG_TARGET_SYSLOG) {
259
r = log_open_syslog();
210
267
if (log_target == LOG_TARGET_AUTO ||
268
log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
211
269
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
212
log_target == LOG_TARGET_KMSG)
213
if ((r = log_open_kmsg()) >= 0) {
270
log_target == LOG_TARGET_KMSG) {
214
274
log_close_syslog();
215
275
log_close_console();
220
282
log_close_syslog();
222
284
/* Get the real /dev/console if we are PID=1, hence reopen */
258
325
if (console_fd < 0)
261
snprintf(location, sizeof(location), "(%s:%u) ", file, line);
262
char_array_0(location);
264
328
highlight = LOG_PRI(level) <= LOG_ERR && show_color;
333
snprintf(location, sizeof(location), "(%s:%u) ", file, line);
334
char_array_0(location);
268
335
IOVEC_SET_STRING(iovec[n++], location);
270
IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_ON);
339
IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED_ON);
271
340
IOVEC_SET_STRING(iovec[n++], buffer);
273
342
IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_OFF);
444
static int write_to_journal(
449
const char *buffer) {
451
char header[LINE_MAX];
452
struct iovec iovec[3];
458
snprintf(header, sizeof(header),
469
char_array_0(header);
472
IOVEC_SET_STRING(iovec[0], header);
473
IOVEC_SET_STRING(iovec[1], buffer);
474
IOVEC_SET_STRING(iovec[2], "\n");
478
mh.msg_iovlen = ELEMENTSOF(iovec);
480
if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0)
374
486
static int log_dispatch(
402
514
if (log_target == LOG_TARGET_AUTO ||
403
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
515
log_target == LOG_TARGET_JOURNAL_OR_KMSG ||
516
log_target == LOG_TARGET_JOURNAL) {
518
k = write_to_journal(level, file, line, func, buffer);
527
if (log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
404
528
log_target == LOG_TARGET_SYSLOG) {
406
if ((k = write_to_syslog(level, file, line, func, buffer)) < 0) {
530
k = write_to_syslog(level, file, line, func, buffer);
409
535
} else if (k > 0)
415
541
log_target == LOG_TARGET_SYSLOG_OR_KMSG ||
416
542
log_target == LOG_TARGET_KMSG)) {
418
if ((k = write_to_kmsg(level, file, line, func, buffer)) < 0) {
544
k = write_to_kmsg(level, file, line, func, buffer);
419
546
log_close_kmsg();
420
547
log_open_console();
421
548
} else if (k > 0)
426
(k = write_to_console(level, file, line, func, buffer)) < 0)
553
k = write_to_console(level, file, line, func, buffer);
430
559
} while (buffer);
593
char buffer[LINE_MAX];
596
if (_likely_(LOG_PRI(level) > log_max_level))
600
vsnprintf(buffer, sizeof(buffer), format, ap);
601
char_array_0(buffer);
603
r = log_dispatch(level, file, line, func, buffer);
460
613
const char *func,
461
614
const char *format, ...) {
463
char buffer[LINE_MAX];
467
if (_likely_(LOG_PRI(level) > log_max_level))
472
619
va_start(ap, format);
473
vsnprintf(buffer, sizeof(buffer), format, ap);
620
r = log_metav(level, file, line, func, format, ap);
476
char_array_0(buffer);
478
r = log_dispatch(level, file, line, func, buffer);
488
const char *format, ...) {
626
#pragma GCC diagnostic push
627
#pragma GCC diagnostic ignored "-Wformat-nonliteral"
628
_noreturn_ static void log_assert(const char *text, const char *file, int line, const char *func, const char *format) {
490
629
static char buffer[LINE_MAX];
491
int saved_errno = errno;
494
va_start(ap, format);
495
vsnprintf(buffer, sizeof(buffer), format, ap);
631
snprintf(buffer, sizeof(buffer), format, text, file, line, func);
498
633
char_array_0(buffer);
499
634
log_abort_msg = buffer;
501
636
log_dispatch(LOG_CRIT, file, line, func, buffer);
504
/* If the user chose to ignore this SIGABRT, we are happy to go on, as if nothing happened. */
639
#pragma GCC diagnostic pop
641
_noreturn_ void log_assert_failed(const char *text, const char *file, int line, const char *func) {
642
log_assert(text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Aborting.");
645
_noreturn_ void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func) {
646
log_assert(text, file, line, func, "Code should not be reached '%s' at %s:%u, function %s(). Aborting.");
508
649
int log_set_target_from_string(const char *e) {
511
if ((t = log_target_from_string(e)) < 0)
652
t = log_target_from_string(e);
514
656
log_set_target(t);
584
729
static const char *const log_target_table[] = {
585
730
[LOG_TARGET_CONSOLE] = "console",
731
[LOG_TARGET_KMSG] = "kmsg",
732
[LOG_TARGET_JOURNAL] = "journal",
733
[LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg",
586
734
[LOG_TARGET_SYSLOG] = "syslog",
587
[LOG_TARGET_KMSG] = "kmsg",
588
735
[LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg",
589
[LOG_TARGET_NULL] = "null",
590
[LOG_TARGET_AUTO] = "auto"
736
[LOG_TARGET_AUTO] = "auto",
737
[LOG_TARGET_NULL] = "null"
593
740
DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);