2 This file is part of systemd.
4 Copyright 2010 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include <sys/signalfd.h>
29 #include <sys/socket.h>
36 #include "sd-messages.h"
38 #include "alloc-util.h"
40 #include "format-util.h"
45 #include "parse-util.h"
46 #include "proc-cmdline.h"
47 #include "process-util.h"
48 #include "signal-util.h"
49 #include "socket-util.h"
50 #include "stdio-util.h"
51 #include "string-table.h"
52 #include "string-util.h"
53 #include "syslog-util.h"
54 #include "terminal-util.h"
55 #include "time-util.h"
58 #define SNDBUF_SIZE (8*1024*1024)
60 static LogTarget log_target = LOG_TARGET_CONSOLE;
61 static int log_max_level[] = {LOG_INFO, LOG_INFO};
62 assert_cc(ELEMENTSOF(log_max_level) == _LOG_REALM_MAX);
63 static int log_facility = LOG_DAEMON;
65 static int console_fd = STDERR_FILENO;
66 static int syslog_fd = -1;
67 static int kmsg_fd = -1;
68 static int journal_fd = -1;
70 static bool syslog_is_stream = false;
72 static bool show_color = false;
73 static bool show_location = false;
75 #if 0 /// UNNEEDED by elogind
76 static bool upgrade_syslog_to_journal = false;
78 static bool always_reopen_console = false;
80 /* Akin to glibc's __abort_msg; which is private and we hence cannot
82 static char *log_abort_msg = NULL;
84 void log_close_console(void) {
89 if (getpid_cached() == 1) {
91 safe_close(console_fd);
97 static int log_open_console(void) {
102 if (always_reopen_console) {
103 console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
107 console_fd = STDERR_FILENO;
112 void log_close_kmsg(void) {
113 kmsg_fd = safe_close(kmsg_fd);
116 static int log_open_kmsg(void) {
121 kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
128 void log_close_syslog(void) {
129 syslog_fd = safe_close(syslog_fd);
132 static int create_log_socket(int type) {
136 fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0);
140 (void) fd_inc_sndbuf(fd, SNDBUF_SIZE);
142 /* We need a blocking fd here since we'd otherwise lose
143 messages way too early. However, let's not hang forever in the
144 unlikely case of a deadlock. */
145 if (getpid_cached() == 1)
146 timeval_store(&tv, 10 * USEC_PER_MSEC);
148 timeval_store(&tv, 10 * USEC_PER_SEC);
149 (void) setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
154 static int log_open_syslog(void) {
156 static const union sockaddr_union sa = {
157 .un.sun_family = AF_UNIX,
158 .un.sun_path = "/dev/log",
166 syslog_fd = create_log_socket(SOCK_DGRAM);
172 if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
173 safe_close(syslog_fd);
175 /* Some legacy syslog systems still use stream
176 * sockets. They really shouldn't. But what can we
178 syslog_fd = create_log_socket(SOCK_STREAM);
184 if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
189 syslog_is_stream = true;
191 syslog_is_stream = false;
200 void log_close_journal(void) {
201 #if 0 /// elogind does not support journald
202 journal_fd = safe_close(journal_fd);
206 #if 0 /// UNNEEDED by elogind
207 static int log_open_journal(void) {
209 static const union sockaddr_union sa = {
210 .un.sun_family = AF_UNIX,
211 .un.sun_path = "/run/systemd/journal/socket",
219 journal_fd = create_log_socket(SOCK_DGRAM);
220 if (journal_fd < 0) {
225 if (connect(journal_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
241 /* Do not call from library code. */
243 /* If we don't use the console we close it here, to not get
244 * killed by SAK. If we don't use syslog we close it here so
245 * that we are not confused by somebody deleting the socket in
246 * the fs. If we don't use /dev/kmsg we still keep it open,
247 * because there is no reason to close it. */
249 if (log_target == LOG_TARGET_NULL) {
256 if (!IN_SET(log_target, LOG_TARGET_AUTO, LOG_TARGET_SAFE) ||
257 getpid_cached() == 1 ||
258 isatty(STDERR_FILENO) <= 0) {
260 #if 0 /// elogind does not support logging to systemd-journald
261 if (IN_SET(log_target, LOG_TARGET_AUTO,
262 LOG_TARGET_JOURNAL_OR_KMSG,
263 LOG_TARGET_JOURNAL)) {
264 r = log_open_journal();
273 if (IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG,
274 LOG_TARGET_SYSLOG)) {
275 r = log_open_syslog();
283 if (IN_SET(log_target, LOG_TARGET_AUTO,
285 LOG_TARGET_JOURNAL_OR_KMSG,
286 LOG_TARGET_SYSLOG_OR_KMSG,
301 return log_open_console();
304 void log_set_target(LogTarget target) {
306 assert(target < _LOG_TARGET_MAX);
308 #if 0 /// elogind does not support logging to systemd-journald
309 if (upgrade_syslog_to_journal) {
310 if (target == LOG_TARGET_SYSLOG)
311 target = LOG_TARGET_JOURNAL;
312 else if (target == LOG_TARGET_SYSLOG_OR_KMSG)
313 target = LOG_TARGET_JOURNAL_OR_KMSG;
320 void log_close(void) {
321 /* Do not call from library code. */
329 #if 0 /// UNNEEDED by elogind
330 void log_forget_fds(void) {
331 /* Do not call from library code. */
333 console_fd = kmsg_fd = syslog_fd = journal_fd = -1;
337 void log_set_max_level_realm(LogRealm realm, int level) {
338 assert((level & LOG_PRIMASK) == level);
339 assert(realm < ELEMENTSOF(log_max_level));
341 log_max_level[realm] = level;
344 void log_set_facility(int facility) {
345 log_facility = facility;
348 static int write_to_console(
354 const char *buffer) {
356 char location[256], prefix[1 + DECIMAL_STR_MAX(int) + 2];
357 struct iovec iovec[6] = {};
364 if (log_target == LOG_TARGET_CONSOLE_PREFIXED) {
365 xsprintf(prefix, "<%i>", level);
366 iovec[n++] = IOVEC_MAKE_STRING(prefix);
369 highlight = LOG_PRI(level) <= LOG_ERR && show_color;
372 snprintf(location, sizeof(location), "(%s:%i) ", file, line);
373 iovec[n++] = IOVEC_MAKE_STRING(location);
377 iovec[n++] = IOVEC_MAKE_STRING(ANSI_HIGHLIGHT_RED);
378 iovec[n++] = IOVEC_MAKE_STRING(buffer);
380 iovec[n++] = IOVEC_MAKE_STRING(ANSI_NORMAL);
381 iovec[n++] = IOVEC_MAKE_STRING("\n");
383 if (writev(console_fd, iovec, n) < 0) {
385 if (errno == EIO && getpid_cached() == 1) {
387 /* If somebody tried to kick us from our
388 * console tty (via vhangup() or suchlike),
389 * try to reconnect */
397 if (writev(console_fd, iovec, n) < 0)
406 static int write_to_syslog(
412 const char *buffer) {
414 char header_priority[2 + DECIMAL_STR_MAX(int) + 1],
416 header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1];
417 struct iovec iovec[5] = {};
418 struct msghdr msghdr = {
420 .msg_iovlen = ELEMENTSOF(iovec),
428 xsprintf(header_priority, "<%i>", level);
430 t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC);
435 if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
438 xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached());
440 iovec[0] = IOVEC_MAKE_STRING(header_priority);
441 iovec[1] = IOVEC_MAKE_STRING(header_time);
442 iovec[2] = IOVEC_MAKE_STRING(program_invocation_short_name);
443 iovec[3] = IOVEC_MAKE_STRING(header_pid);
444 iovec[4] = IOVEC_MAKE_STRING(buffer);
446 /* When using syslog via SOCK_STREAM separate the messages by NUL chars */
447 if (syslog_is_stream)
453 n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL);
457 if (!syslog_is_stream ||
458 (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec)))
461 IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n);
467 static int write_to_kmsg(
473 const char *buffer) {
475 char header_priority[2 + DECIMAL_STR_MAX(int) + 1],
476 header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1];
477 struct iovec iovec[5] = {};
482 xsprintf(header_priority, "<%i>", level);
483 xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached());
485 iovec[0] = IOVEC_MAKE_STRING(header_priority);
486 iovec[1] = IOVEC_MAKE_STRING(program_invocation_short_name);
487 iovec[2] = IOVEC_MAKE_STRING(header_pid);
488 iovec[3] = IOVEC_MAKE_STRING(buffer);
489 iovec[4] = IOVEC_MAKE_STRING("\n");
491 if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0)
497 static int log_do_header(
502 const char *file, int line, const char *func,
503 const char *object_field, const char *object,
504 const char *extra_field, const char *extra) {
506 snprintf(header, size,
508 "SYSLOG_FACILITY=%i\n"
515 "SYSLOG_IDENTIFIER=%s\n",
518 isempty(file) ? "" : "CODE_FILE=",
519 isempty(file) ? "" : file,
520 isempty(file) ? "" : "\n",
521 line ? "CODE_LINE=" : "",
522 line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */
524 isempty(func) ? "" : "CODE_FUNC=",
525 isempty(func) ? "" : func,
526 isempty(func) ? "" : "\n",
527 error ? "ERRNO=" : "",
528 error ? 1 : 0, error,
530 isempty(object) ? "" : object_field,
531 isempty(object) ? "" : object,
532 isempty(object) ? "" : "\n",
533 isempty(extra) ? "" : extra_field,
534 isempty(extra) ? "" : extra,
535 isempty(extra) ? "" : "\n",
536 program_invocation_short_name);
541 #if 0 /// UNNEEDED by elogind
542 static int write_to_journal(
548 const char *object_field,
550 const char *extra_field,
552 const char *buffer) {
554 char header[LINE_MAX];
555 struct iovec iovec[4] = {};
556 struct msghdr mh = {};
561 log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object, extra_field, extra);
563 iovec[0] = IOVEC_MAKE_STRING(header);
564 iovec[1] = IOVEC_MAKE_STRING("MESSAGE=");
565 iovec[2] = IOVEC_MAKE_STRING(buffer);
566 iovec[3] = IOVEC_MAKE_STRING("\n");
569 mh.msg_iovlen = ELEMENTSOF(iovec);
571 if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0)
578 int log_dispatch_internal(
584 const char *object_field,
587 const char *extra_field,
595 if (log_target == LOG_TARGET_NULL)
598 /* Patch in LOG_DAEMON facility if necessary */
599 if ((level & LOG_FACMASK) == 0)
600 level = log_facility | LOG_PRI(level);
606 buffer += strspn(buffer, NEWLINE);
611 if ((e = strpbrk(buffer, NEWLINE)))
614 #if 0 /// elogind does not support logging to systemd-journald
615 if (IN_SET(log_target, LOG_TARGET_AUTO,
616 LOG_TARGET_JOURNAL_OR_KMSG,
617 LOG_TARGET_JOURNAL)) {
619 k = write_to_journal(level, error, file, line, func, object_field, object, extra_field, extra, buffer);
628 if (IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG,
629 LOG_TARGET_SYSLOG)) {
631 k = write_to_syslog(level, error, file, line, func, buffer);
640 IN_SET(log_target, LOG_TARGET_AUTO,
642 LOG_TARGET_SYSLOG_OR_KMSG,
643 LOG_TARGET_JOURNAL_OR_KMSG,
646 k = write_to_kmsg(level, error, file, line, func, buffer);
654 (void) write_to_console(level, error, file, line, func, buffer);
662 int log_dump_internal(
670 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
673 /* This modifies the buffer... */
678 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
681 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
684 int log_internalv_realm(
693 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
694 char buffer[LINE_MAX];
700 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
703 /* Make sure that %m maps to the specified error */
707 vsnprintf(buffer, sizeof(buffer), format, ap);
709 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
712 int log_internal_realm(
718 const char *format, ...) {
723 va_start(ap, format);
724 r = log_internalv_realm(level, error, file, line, func, format, ap);
730 int log_object_internalv(
736 const char *object_field,
738 const char *extra_field,
749 if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]))
752 /* Make sure that %m maps to the specified error */
756 /* Prepend the object name before the message */
761 buffer = newa(char, n + 2 + LINE_MAX);
762 b = stpcpy(stpcpy(buffer, object), ": ");
764 b = buffer = newa(char, LINE_MAX);
766 vsnprintf(b, LINE_MAX, format, ap);
768 return log_dispatch_internal(level, error, file, line, func,
769 object_field, object, extra_field, extra, buffer);
772 int log_object_internal(
778 const char *object_field,
780 const char *extra_field,
782 const char *format, ...) {
787 va_start(ap, format);
788 r = log_object_internalv(level, error, file, line, func, object_field, object, extra_field, extra, format, ap);
794 static void log_assert(
800 const char *format) {
802 static char buffer[LINE_MAX];
803 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
805 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
808 DISABLE_WARNING_FORMAT_NONLITERAL;
809 snprintf(buffer, sizeof buffer, format, text, file, line, func);
812 log_abort_msg = buffer;
814 log_dispatch_internal(level, 0, file, line, func, NULL, NULL, NULL, NULL, buffer);
817 noreturn void log_assert_failed_realm(
824 log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func,
825 "Assertion '%s' failed at %s:%u, function %s(). Aborting.");
829 noreturn void log_assert_failed_unreachable_realm(
836 log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func,
837 "Code should not be reached '%s' at %s:%u, function %s(). Aborting.");
841 void log_assert_failed_return_realm(
848 log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_DEBUG), text, file, line, func,
849 "Assertion '%s' failed at %s:%u, function %s(). Ignoring.");
852 int log_oom_internal(LogRealm realm, const char *file, int line, const char *func) {
853 return log_internal_realm(LOG_REALM_PLUS_LEVEL(realm, LOG_ERR),
854 ENOMEM, file, line, func, "Out of memory.");
857 int log_format_iovec(
861 bool newline_separator,
866 static const char nl = '\n';
868 while (format && *n + 1 < iovec_len) {
873 /* We need to copy the va_list structure,
874 * since vasprintf() leaves it afterwards at
875 * an undefined location */
881 r = vasprintf(&m, format, aq);
886 /* Now, jump enough ahead, so that we point to
887 * the next format string */
888 VA_FORMAT_ADVANCE(format, ap);
890 iovec[(*n)++] = IOVEC_MAKE_STRING(m);
892 if (newline_separator) {
893 iovec[*n].iov_base = (char*) &nl;
894 iovec[*n].iov_len = 1;
898 format = va_arg(ap, char *);
903 int log_struct_internal(
909 const char *format, ...) {
911 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
920 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
923 if (log_target == LOG_TARGET_NULL)
926 if ((level & LOG_FACMASK) == 0)
927 level = log_facility | LOG_PRI(level);
929 #if 0 /// elogind does not support logging to systemd-journald
930 if (IN_SET(log_target, LOG_TARGET_AUTO,
931 LOG_TARGET_JOURNAL_OR_KMSG,
932 LOG_TARGET_JOURNAL) &&
934 char header[LINE_MAX];
935 struct iovec iovec[17] = {};
941 bool fallback = false;
943 /* If the journal is available do structured logging */
944 log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);
945 iovec[n++] = IOVEC_MAKE_STRING(header);
947 va_start(ap, format);
948 r = log_format_iovec(iovec, ELEMENTSOF(iovec), &n, true, error, format, ap);
953 (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL);
957 for (i = 1; i < n; i += 2)
958 free(iovec[i].iov_base);
965 /* Fallback if journal logging is not available or didn't work. */
967 va_start(ap, format);
975 vsnprintf(buf, sizeof(buf), format, aq);
978 if (startswith(buf, "MESSAGE=")) {
983 VA_FORMAT_ADVANCE(format, ap);
985 format = va_arg(ap, char *);
992 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buf + 8);
995 int log_struct_iovec_internal(
1001 const struct iovec input_iovec[],
1002 size_t n_input_iovec) {
1004 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
1012 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
1015 if (log_target == LOG_TARGET_NULL)
1018 if ((level & LOG_FACMASK) == 0)
1019 level = log_facility | LOG_PRI(level);
1021 if (IN_SET(log_target, LOG_TARGET_AUTO,
1022 LOG_TARGET_JOURNAL_OR_KMSG,
1023 LOG_TARGET_JOURNAL) &&
1026 struct iovec iovec[1 + n_input_iovec*2];
1027 char header[LINE_MAX];
1028 struct msghdr mh = {
1030 .msg_iovlen = 1 + n_input_iovec*2,
1033 log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);
1034 iovec[0] = IOVEC_MAKE_STRING(header);
1036 for (i = 0; i < n_input_iovec; i++) {
1037 iovec[1+i*2] = input_iovec[i];
1038 iovec[1+i*2+1] = IOVEC_MAKE_STRING("\n");
1041 if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) >= 0)
1045 for (i = 0; i < n_input_iovec; i++) {
1046 if (input_iovec[i].iov_len < strlen("MESSAGE="))
1049 if (memcmp(input_iovec[i].iov_base, "MESSAGE=", strlen("MESSAGE=")) == 0)
1053 if (_unlikely_(i >= n_input_iovec)) /* Couldn't find MESSAGE=? */
1056 m = strndupa(input_iovec[i].iov_base + strlen("MESSAGE="),
1057 input_iovec[i].iov_len - strlen("MESSAGE="));
1059 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, m);
1062 int log_set_target_from_string(const char *e) {
1065 t = log_target_from_string(e);
1073 int log_set_max_level_from_string_realm(LogRealm realm, const char *e) {
1076 t = log_level_from_string(e);
1080 log_set_max_level_realm(realm, t);
1084 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
1087 * The systemd.log_xyz= settings are parsed by all tools, and
1090 * However, "quiet" is only parsed by PID 1, and only turns of
1091 * status output to /dev/console, but does not alter the log
1095 if (streq(key, "debug") && !value)
1096 log_set_max_level(LOG_DEBUG);
1098 else if (proc_cmdline_key_streq(key, "systemd.log_target")) {
1100 if (proc_cmdline_value_missing(key, value))
1103 if (log_set_target_from_string(value) < 0)
1104 log_warning("Failed to parse log target '%s'. Ignoring.", value);
1106 } else if (proc_cmdline_key_streq(key, "systemd.log_level")) {
1108 if (proc_cmdline_value_missing(key, value))
1111 if (log_set_max_level_from_string(value) < 0)
1112 log_warning("Failed to parse log level '%s'. Ignoring.", value);
1114 } else if (proc_cmdline_key_streq(key, "systemd.log_color")) {
1116 if (log_show_color_from_string(value ?: "1") < 0)
1117 log_warning("Failed to parse log color setting '%s'. Ignoring.", value);
1119 } else if (proc_cmdline_key_streq(key, "systemd.log_location")) {
1121 if (log_show_location_from_string(value ?: "1") < 0)
1122 log_warning("Failed to parse log location setting '%s'. Ignoring.", value);
1128 void log_parse_environment_realm(LogRealm realm) {
1129 /* Do not call from library code. */
1133 if (get_ctty_devnr(0, NULL) < 0)
1134 /* Only try to read the command line in daemons. We assume that anything that has a controlling tty is
1136 (void) proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
1138 e = getenv("SYSTEMD_LOG_TARGET");
1139 if (e && log_set_target_from_string(e) < 0)
1140 log_warning("Failed to parse log target '%s'. Ignoring.", e);
1142 e = getenv("SYSTEMD_LOG_LEVEL");
1143 if (e && log_set_max_level_from_string_realm(realm, e) < 0)
1144 log_warning("Failed to parse log level '%s'. Ignoring.", e);
1146 e = getenv("SYSTEMD_LOG_COLOR");
1147 if (e && log_show_color_from_string(e) < 0)
1148 log_warning("Failed to parse bool '%s'. Ignoring.", e);
1150 e = getenv("SYSTEMD_LOG_LOCATION");
1151 if (e && log_show_location_from_string(e) < 0)
1152 log_warning("Failed to parse bool '%s'. Ignoring.", e);
1155 LogTarget log_get_target(void) {
1159 int log_get_max_level_realm(LogRealm realm) {
1160 return log_max_level[realm];
1163 void log_show_color(bool b) {
1167 bool log_get_show_color(void) {
1171 void log_show_location(bool b) {
1175 bool log_get_show_location(void) {
1176 return show_location;
1179 int log_show_color_from_string(const char *e) {
1182 t = parse_boolean(e);
1190 int log_show_location_from_string(const char *e) {
1193 t = parse_boolean(e);
1197 log_show_location(t);
1201 bool log_on_console(void) {
1202 if (IN_SET(log_target, LOG_TARGET_CONSOLE,
1203 LOG_TARGET_CONSOLE_PREFIXED))
1206 return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0;
1209 static const char *const log_target_table[_LOG_TARGET_MAX] = {
1210 [LOG_TARGET_CONSOLE] = "console",
1211 [LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed",
1212 [LOG_TARGET_KMSG] = "kmsg",
1213 #if 0 /// elogind does not support logging to systemd-journald
1214 [LOG_TARGET_JOURNAL] = "journal",
1215 [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg",
1217 [LOG_TARGET_SYSLOG] = "syslog",
1218 [LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg",
1219 [LOG_TARGET_AUTO] = "auto",
1220 [LOG_TARGET_SAFE] = "safe",
1221 [LOG_TARGET_NULL] = "null"
1224 DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);
1226 #if 0 /// UNNEEDED by elogind
1227 void log_received_signal(int level, const struct signalfd_siginfo *si) {
1228 if (si->ssi_pid > 0) {
1229 _cleanup_free_ char *p = NULL;
1231 get_process_comm(si->ssi_pid, &p);
1234 "Received SIG%s from PID %"PRIu32" (%s).",
1235 signal_to_string(si->ssi_signo),
1236 si->ssi_pid, strna(p));
1240 signal_to_string(si->ssi_signo));
1244 void log_set_upgrade_syslog_to_journal(bool b) {
1245 upgrade_syslog_to_journal = b;
1249 int log_syntax_internal(
1252 const char *config_file,
1253 unsigned config_line,
1258 const char *format, ...) {
1261 char buffer[LINE_MAX];
1263 const char *unit_fmt = NULL;
1268 if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]))
1271 if (log_target == LOG_TARGET_NULL)
1277 va_start(ap, format);
1278 vsnprintf(buffer, sizeof(buffer), format, ap);
1282 unit_fmt = getpid_cached() == 1 ? "UNIT=%s" : "USER_UNIT=%s";
1284 return log_struct_internal(
1285 LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level),
1288 "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR,
1289 "CONFIG_FILE=%s", config_file,
1290 "CONFIG_LINE=%u", config_line,
1291 LOG_MESSAGE("%s:%u: %s", config_file, config_line, buffer),
1296 #if 0 /// UNNEEDED by elogind
1297 void log_set_always_reopen_console(bool b) {
1298 always_reopen_console = b;