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;
79 static bool open_when_needed = false;
81 /* Akin to glibc's __abort_msg; which is private and we hence cannot
83 static char *log_abort_msg = NULL;
85 void log_close_console(void) {
90 if (getpid_cached() == 1) {
92 safe_close(console_fd);
98 static int log_open_console(void) {
103 if (always_reopen_console) {
104 console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC);
108 console_fd = STDERR_FILENO;
113 void log_close_kmsg(void) {
114 kmsg_fd = safe_close(kmsg_fd);
117 static int log_open_kmsg(void) {
122 kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC);
129 void log_close_syslog(void) {
130 syslog_fd = safe_close(syslog_fd);
133 static int create_log_socket(int type) {
137 fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0);
141 (void) fd_inc_sndbuf(fd, SNDBUF_SIZE);
143 /* We need a blocking fd here since we'd otherwise lose
144 messages way too early. However, let's not hang forever in the
145 unlikely case of a deadlock. */
146 if (getpid_cached() == 1)
147 timeval_store(&tv, 10 * USEC_PER_MSEC);
149 timeval_store(&tv, 10 * USEC_PER_SEC);
150 (void) setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
155 static int log_open_syslog(void) {
157 static const union sockaddr_union sa = {
158 .un.sun_family = AF_UNIX,
159 .un.sun_path = "/dev/log",
167 syslog_fd = create_log_socket(SOCK_DGRAM);
173 if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
174 safe_close(syslog_fd);
176 /* Some legacy syslog systems still use stream
177 * sockets. They really shouldn't. But what can we
179 syslog_fd = create_log_socket(SOCK_STREAM);
185 if (connect(syslog_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
190 syslog_is_stream = true;
192 syslog_is_stream = false;
201 void log_close_journal(void) {
202 #if 0 /// elogind does not support journald
203 journal_fd = safe_close(journal_fd);
207 #if 0 /// UNNEEDED by elogind
208 static int log_open_journal(void) {
210 static const union sockaddr_union sa = {
211 .un.sun_family = AF_UNIX,
212 .un.sun_path = "/run/systemd/journal/socket",
220 journal_fd = create_log_socket(SOCK_DGRAM);
221 if (journal_fd < 0) {
226 if (connect(journal_fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) {
242 /* Do not call from library code. */
244 /* If we don't use the console we close it here, to not get
245 * killed by SAK. If we don't use syslog we close it here so
246 * that we are not confused by somebody deleting the socket in
247 * the fs. If we don't use /dev/kmsg we still keep it open,
248 * because there is no reason to close it. */
250 if (log_target == LOG_TARGET_NULL) {
257 if (!IN_SET(log_target, LOG_TARGET_AUTO, LOG_TARGET_SAFE) ||
258 getpid_cached() == 1 ||
259 isatty(STDERR_FILENO) <= 0) {
261 #if 0 /// elogind does not support logging to systemd-journald
262 if (IN_SET(log_target, LOG_TARGET_AUTO,
263 LOG_TARGET_JOURNAL_OR_KMSG,
264 LOG_TARGET_JOURNAL)) {
265 r = log_open_journal();
274 if (IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG,
275 LOG_TARGET_SYSLOG)) {
276 r = log_open_syslog();
284 if (IN_SET(log_target, LOG_TARGET_AUTO,
286 LOG_TARGET_JOURNAL_OR_KMSG,
287 LOG_TARGET_SYSLOG_OR_KMSG,
302 return log_open_console();
305 void log_set_target(LogTarget target) {
307 assert(target < _LOG_TARGET_MAX);
309 #if 0 /// elogind does not support logging to systemd-journald
310 if (upgrade_syslog_to_journal) {
311 if (target == LOG_TARGET_SYSLOG)
312 target = LOG_TARGET_JOURNAL;
313 else if (target == LOG_TARGET_SYSLOG_OR_KMSG)
314 target = LOG_TARGET_JOURNAL_OR_KMSG;
321 void log_close(void) {
322 /* Do not call from library code. */
330 #if 0 /// UNNEEDED by elogind
331 void log_forget_fds(void) {
332 /* Do not call from library code. */
334 console_fd = kmsg_fd = syslog_fd = journal_fd = -1;
338 void log_set_max_level_realm(LogRealm realm, int level) {
339 assert((level & LOG_PRIMASK) == level);
340 assert(realm < ELEMENTSOF(log_max_level));
342 log_max_level[realm] = level;
345 void log_set_facility(int facility) {
346 log_facility = facility;
349 static int write_to_console(
355 const char *buffer) {
357 char location[256], prefix[1 + DECIMAL_STR_MAX(int) + 2];
358 struct iovec iovec[6] = {};
365 if (log_target == LOG_TARGET_CONSOLE_PREFIXED) {
366 xsprintf(prefix, "<%i>", level);
367 iovec[n++] = IOVEC_MAKE_STRING(prefix);
370 highlight = LOG_PRI(level) <= LOG_ERR && show_color;
373 xsprintf(location, "(%s:%i) ", file, line);
374 iovec[n++] = IOVEC_MAKE_STRING(location);
378 iovec[n++] = IOVEC_MAKE_STRING(ANSI_HIGHLIGHT_RED);
379 iovec[n++] = IOVEC_MAKE_STRING(buffer);
381 iovec[n++] = IOVEC_MAKE_STRING(ANSI_NORMAL);
382 iovec[n++] = IOVEC_MAKE_STRING("\n");
384 if (writev(console_fd, iovec, n) < 0) {
386 if (errno == EIO && getpid_cached() == 1) {
388 /* If somebody tried to kick us from our
389 * console tty (via vhangup() or suchlike),
390 * try to reconnect */
398 if (writev(console_fd, iovec, n) < 0)
407 static int write_to_syslog(
413 const char *buffer) {
415 char header_priority[2 + DECIMAL_STR_MAX(int) + 1],
417 header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1];
418 struct iovec iovec[5] = {};
419 struct msghdr msghdr = {
421 .msg_iovlen = ELEMENTSOF(iovec),
429 xsprintf(header_priority, "<%i>", level);
431 t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC);
436 if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0)
439 xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached());
441 iovec[0] = IOVEC_MAKE_STRING(header_priority);
442 iovec[1] = IOVEC_MAKE_STRING(header_time);
443 iovec[2] = IOVEC_MAKE_STRING(program_invocation_short_name);
444 iovec[3] = IOVEC_MAKE_STRING(header_pid);
445 iovec[4] = IOVEC_MAKE_STRING(buffer);
447 /* When using syslog via SOCK_STREAM separate the messages by NUL chars */
448 if (syslog_is_stream)
454 n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL);
458 if (!syslog_is_stream ||
459 (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec)))
462 IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n);
468 static int write_to_kmsg(
474 const char *buffer) {
476 char header_priority[2 + DECIMAL_STR_MAX(int) + 1],
477 header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1];
478 struct iovec iovec[5] = {};
483 xsprintf(header_priority, "<%i>", level);
484 xsprintf(header_pid, "["PID_FMT"]: ", getpid_cached());
486 iovec[0] = IOVEC_MAKE_STRING(header_priority);
487 iovec[1] = IOVEC_MAKE_STRING(program_invocation_short_name);
488 iovec[2] = IOVEC_MAKE_STRING(header_pid);
489 iovec[3] = IOVEC_MAKE_STRING(buffer);
490 iovec[4] = IOVEC_MAKE_STRING("\n");
492 if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0)
498 static int log_do_header(
503 const char *file, int line, const char *func,
504 const char *object_field, const char *object,
505 const char *extra_field, const char *extra) {
507 snprintf(header, size,
509 "SYSLOG_FACILITY=%i\n"
516 "SYSLOG_IDENTIFIER=%s\n",
519 isempty(file) ? "" : "CODE_FILE=",
520 isempty(file) ? "" : file,
521 isempty(file) ? "" : "\n",
522 line ? "CODE_LINE=" : "",
523 line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */
525 isempty(func) ? "" : "CODE_FUNC=",
526 isempty(func) ? "" : func,
527 isempty(func) ? "" : "\n",
528 error ? "ERRNO=" : "",
529 error ? 1 : 0, error,
531 isempty(object) ? "" : object_field,
532 isempty(object) ? "" : object,
533 isempty(object) ? "" : "\n",
534 isempty(extra) ? "" : extra_field,
535 isempty(extra) ? "" : extra,
536 isempty(extra) ? "" : "\n",
537 program_invocation_short_name);
542 #if 0 /// UNNEEDED by elogind
543 static int write_to_journal(
549 const char *object_field,
551 const char *extra_field,
553 const char *buffer) {
555 char header[LINE_MAX];
556 struct iovec iovec[4] = {};
557 struct msghdr mh = {};
562 log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object, extra_field, extra);
564 iovec[0] = IOVEC_MAKE_STRING(header);
565 iovec[1] = IOVEC_MAKE_STRING("MESSAGE=");
566 iovec[2] = IOVEC_MAKE_STRING(buffer);
567 iovec[3] = IOVEC_MAKE_STRING("\n");
570 mh.msg_iovlen = ELEMENTSOF(iovec);
572 if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0)
579 int log_dispatch_internal(
585 const char *object_field,
588 const char *extra_field,
596 if (log_target == LOG_TARGET_NULL)
599 /* Patch in LOG_DAEMON facility if necessary */
600 if ((level & LOG_FACMASK) == 0)
601 level = log_facility | LOG_PRI(level);
603 if (open_when_needed)
610 buffer += strspn(buffer, NEWLINE);
615 if ((e = strpbrk(buffer, NEWLINE)))
618 #if 0 /// elogind does not support logging to systemd-journald
619 if (IN_SET(log_target, LOG_TARGET_AUTO,
620 LOG_TARGET_JOURNAL_OR_KMSG,
621 LOG_TARGET_JOURNAL)) {
623 k = write_to_journal(level, error, file, line, func, object_field, object, extra_field, extra, buffer);
632 if (IN_SET(log_target, LOG_TARGET_SYSLOG_OR_KMSG,
633 LOG_TARGET_SYSLOG)) {
635 k = write_to_syslog(level, error, file, line, func, buffer);
644 IN_SET(log_target, LOG_TARGET_AUTO,
646 LOG_TARGET_SYSLOG_OR_KMSG,
647 LOG_TARGET_JOURNAL_OR_KMSG,
650 k = write_to_kmsg(level, error, file, line, func, buffer);
658 (void) write_to_console(level, error, file, line, func, buffer);
663 if (open_when_needed)
669 int log_dump_internal(
677 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
680 /* This modifies the buffer... */
685 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
688 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
691 int log_internalv_realm(
700 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
701 char buffer[LINE_MAX];
707 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
710 /* Make sure that %m maps to the specified error */
714 vsnprintf(buffer, sizeof(buffer), format, ap);
716 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buffer);
719 int log_internal_realm(
725 const char *format, ...) {
730 va_start(ap, format);
731 r = log_internalv_realm(level, error, file, line, func, format, ap);
737 int log_object_internalv(
743 const char *object_field,
745 const char *extra_field,
756 if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]))
759 /* Make sure that %m maps to the specified error */
763 /* Prepend the object name before the message */
768 buffer = newa(char, n + 2 + LINE_MAX);
769 b = stpcpy(stpcpy(buffer, object), ": ");
771 b = buffer = newa(char, LINE_MAX);
773 vsnprintf(b, LINE_MAX, format, ap);
775 return log_dispatch_internal(level, error, file, line, func,
776 object_field, object, extra_field, extra, buffer);
779 int log_object_internal(
785 const char *object_field,
787 const char *extra_field,
789 const char *format, ...) {
794 va_start(ap, format);
795 r = log_object_internalv(level, error, file, line, func, object_field, object, extra_field, extra, format, ap);
801 static void log_assert(
807 const char *format) {
809 static char buffer[LINE_MAX];
810 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
812 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
815 DISABLE_WARNING_FORMAT_NONLITERAL;
816 xsprintf(buffer, format, text, file, line, func);
819 log_abort_msg = buffer;
821 log_dispatch_internal(level, 0, file, line, func, NULL, NULL, NULL, NULL, buffer);
824 noreturn void log_assert_failed_realm(
831 log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func,
832 "Assertion '%s' failed at %s:%u, function %s(). Aborting.");
836 noreturn void log_assert_failed_unreachable_realm(
843 log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_CRIT), text, file, line, func,
844 "Code should not be reached '%s' at %s:%u, function %s(). Aborting.");
848 void log_assert_failed_return_realm(
855 log_assert(LOG_REALM_PLUS_LEVEL(realm, LOG_DEBUG), text, file, line, func,
856 "Assertion '%s' failed at %s:%u, function %s(). Ignoring.");
859 int log_oom_internal(LogRealm realm, const char *file, int line, const char *func) {
860 return log_internal_realm(LOG_REALM_PLUS_LEVEL(realm, LOG_ERR),
861 ENOMEM, file, line, func, "Out of memory.");
864 int log_format_iovec(
868 bool newline_separator,
873 static const char nl = '\n';
875 while (format && *n + 1 < iovec_len) {
880 /* We need to copy the va_list structure,
881 * since vasprintf() leaves it afterwards at
882 * an undefined location */
888 r = vasprintf(&m, format, aq);
893 /* Now, jump enough ahead, so that we point to
894 * the next format string */
895 VA_FORMAT_ADVANCE(format, ap);
897 iovec[(*n)++] = IOVEC_MAKE_STRING(m);
899 if (newline_separator) {
900 iovec[*n].iov_base = (char*) &nl;
901 iovec[*n].iov_len = 1;
905 format = va_arg(ap, char *);
910 int log_struct_internal(
916 const char *format, ...) {
918 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
927 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
930 if (log_target == LOG_TARGET_NULL)
933 if ((level & LOG_FACMASK) == 0)
934 level = log_facility | LOG_PRI(level);
936 #if 0 /// elogind does not support logging to systemd-journald
937 if (IN_SET(log_target,
939 LOG_TARGET_JOURNAL_OR_KMSG,
940 LOG_TARGET_JOURNAL)) {
942 if (open_when_needed)
945 if (journal_fd >= 0) {
946 char header[LINE_MAX];
947 struct iovec iovec[17] = {};
953 bool fallback = false;
955 /* If the journal is available do structured logging */
956 log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);
957 iovec[n++] = IOVEC_MAKE_STRING(header);
959 va_start(ap, format);
960 r = log_format_iovec(iovec, ELEMENTSOF(iovec), &n, true, error, format, ap);
965 (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL);
969 for (i = 1; i < n; i += 2)
970 free(iovec[i].iov_base);
973 if (open_when_needed)
982 /* Fallback if journal logging is not available or didn't work. */
984 va_start(ap, format);
992 vsnprintf(buf, sizeof(buf), format, aq);
995 if (startswith(buf, "MESSAGE=")) {
1000 VA_FORMAT_ADVANCE(format, ap);
1002 format = va_arg(ap, char *);
1007 if (open_when_needed)
1013 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, buf + 8);
1016 int log_struct_iovec_internal(
1022 const struct iovec input_iovec[],
1023 size_t n_input_iovec) {
1025 LogRealm realm = LOG_REALM_REMOVE_LEVEL(level);
1033 if (_likely_(LOG_PRI(level) > log_max_level[realm]))
1036 if (log_target == LOG_TARGET_NULL)
1039 if ((level & LOG_FACMASK) == 0)
1040 level = log_facility | LOG_PRI(level);
1042 if (IN_SET(log_target, LOG_TARGET_AUTO,
1043 LOG_TARGET_JOURNAL_OR_KMSG,
1044 LOG_TARGET_JOURNAL) &&
1047 struct iovec iovec[1 + n_input_iovec*2];
1048 char header[LINE_MAX];
1049 struct msghdr mh = {
1051 .msg_iovlen = 1 + n_input_iovec*2,
1054 log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL, NULL, NULL);
1055 iovec[0] = IOVEC_MAKE_STRING(header);
1057 for (i = 0; i < n_input_iovec; i++) {
1058 iovec[1+i*2] = input_iovec[i];
1059 iovec[1+i*2+1] = IOVEC_MAKE_STRING("\n");
1062 if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) >= 0)
1066 for (i = 0; i < n_input_iovec; i++) {
1067 if (input_iovec[i].iov_len < strlen("MESSAGE="))
1070 if (memcmp(input_iovec[i].iov_base, "MESSAGE=", strlen("MESSAGE=")) == 0)
1074 if (_unlikely_(i >= n_input_iovec)) /* Couldn't find MESSAGE=? */
1077 m = strndupa(input_iovec[i].iov_base + strlen("MESSAGE="),
1078 input_iovec[i].iov_len - strlen("MESSAGE="));
1080 return log_dispatch_internal(level, error, file, line, func, NULL, NULL, NULL, NULL, m);
1083 int log_set_target_from_string(const char *e) {
1086 t = log_target_from_string(e);
1094 int log_set_max_level_from_string_realm(LogRealm realm, const char *e) {
1097 t = log_level_from_string(e);
1101 log_set_max_level_realm(realm, t);
1105 static int parse_proc_cmdline_item(const char *key, const char *value, void *data) {
1108 * The systemd.log_xyz= settings are parsed by all tools, and
1111 * However, "quiet" is only parsed by PID 1, and only turns of
1112 * status output to /dev/console, but does not alter the log
1116 if (streq(key, "debug") && !value)
1117 log_set_max_level(LOG_DEBUG);
1119 else if (proc_cmdline_key_streq(key, "systemd.log_target")) {
1121 if (proc_cmdline_value_missing(key, value))
1124 if (log_set_target_from_string(value) < 0)
1125 log_warning("Failed to parse log target '%s'. Ignoring.", value);
1127 } else if (proc_cmdline_key_streq(key, "systemd.log_level")) {
1129 if (proc_cmdline_value_missing(key, value))
1132 if (log_set_max_level_from_string(value) < 0)
1133 log_warning("Failed to parse log level '%s'. Ignoring.", value);
1135 } else if (proc_cmdline_key_streq(key, "systemd.log_color")) {
1137 if (log_show_color_from_string(value ?: "1") < 0)
1138 log_warning("Failed to parse log color setting '%s'. Ignoring.", value);
1140 } else if (proc_cmdline_key_streq(key, "systemd.log_location")) {
1142 if (log_show_location_from_string(value ?: "1") < 0)
1143 log_warning("Failed to parse log location setting '%s'. Ignoring.", value);
1149 void log_parse_environment_realm(LogRealm realm) {
1150 /* Do not call from library code. */
1154 if (get_ctty_devnr(0, NULL) < 0)
1155 /* Only try to read the command line in daemons. We assume that anything that has a controlling tty is
1157 (void) proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX);
1159 e = getenv("SYSTEMD_LOG_TARGET");
1160 if (e && log_set_target_from_string(e) < 0)
1161 log_warning("Failed to parse log target '%s'. Ignoring.", e);
1163 e = getenv("SYSTEMD_LOG_LEVEL");
1164 if (e && log_set_max_level_from_string_realm(realm, e) < 0)
1165 log_warning("Failed to parse log level '%s'. Ignoring.", e);
1167 e = getenv("SYSTEMD_LOG_COLOR");
1168 if (e && log_show_color_from_string(e) < 0)
1169 log_warning("Failed to parse bool '%s'. Ignoring.", e);
1171 e = getenv("SYSTEMD_LOG_LOCATION");
1172 if (e && log_show_location_from_string(e) < 0)
1173 log_warning("Failed to parse bool '%s'. Ignoring.", e);
1176 LogTarget log_get_target(void) {
1180 int log_get_max_level_realm(LogRealm realm) {
1181 return log_max_level[realm];
1184 void log_show_color(bool b) {
1188 bool log_get_show_color(void) {
1192 void log_show_location(bool b) {
1196 bool log_get_show_location(void) {
1197 return show_location;
1200 int log_show_color_from_string(const char *e) {
1203 t = parse_boolean(e);
1211 int log_show_location_from_string(const char *e) {
1214 t = parse_boolean(e);
1218 log_show_location(t);
1222 bool log_on_console(void) {
1223 if (IN_SET(log_target, LOG_TARGET_CONSOLE,
1224 LOG_TARGET_CONSOLE_PREFIXED))
1227 return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0;
1230 static const char *const log_target_table[_LOG_TARGET_MAX] = {
1231 [LOG_TARGET_CONSOLE] = "console",
1232 [LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed",
1233 [LOG_TARGET_KMSG] = "kmsg",
1234 #if 0 /// elogind does not support logging to systemd-journald
1235 [LOG_TARGET_JOURNAL] = "journal",
1236 [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg",
1238 [LOG_TARGET_SYSLOG] = "syslog",
1239 [LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg",
1240 [LOG_TARGET_AUTO] = "auto",
1241 [LOG_TARGET_SAFE] = "safe",
1242 [LOG_TARGET_NULL] = "null"
1245 DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget);
1247 #if 0 /// UNNEEDED by elogind
1248 void log_received_signal(int level, const struct signalfd_siginfo *si) {
1249 if (si->ssi_pid > 0) {
1250 _cleanup_free_ char *p = NULL;
1252 get_process_comm(si->ssi_pid, &p);
1255 "Received SIG%s from PID %"PRIu32" (%s).",
1256 signal_to_string(si->ssi_signo),
1257 si->ssi_pid, strna(p));
1261 signal_to_string(si->ssi_signo));
1266 int log_syntax_internal(
1269 const char *config_file,
1270 unsigned config_line,
1275 const char *format, ...) {
1278 char buffer[LINE_MAX];
1280 const char *unit_fmt = NULL;
1285 if (_likely_(LOG_PRI(level) > log_max_level[LOG_REALM_SYSTEMD]))
1288 if (log_target == LOG_TARGET_NULL)
1294 va_start(ap, format);
1295 vsnprintf(buffer, sizeof(buffer), format, ap);
1299 unit_fmt = getpid_cached() == 1 ? "UNIT=%s" : "USER_UNIT=%s";
1301 return log_struct_internal(
1302 LOG_REALM_PLUS_LEVEL(LOG_REALM_SYSTEMD, level),
1305 "MESSAGE_ID=" SD_MESSAGE_INVALID_CONFIGURATION_STR,
1306 "CONFIG_FILE=%s", config_file,
1307 "CONFIG_LINE=%u", config_line,
1308 LOG_MESSAGE("%s:%u: %s", config_file, config_line, buffer),
1313 #if 0 /// UNNEEDED by elogind
1314 void log_set_upgrade_syslog_to_journal(bool b) {
1315 upgrade_syslog_to_journal = b;
1318 void log_set_always_reopen_console(bool b) {
1319 always_reopen_console = b;
1323 void log_set_open_when_needed(bool b) {
1324 open_when_needed = b;