/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2010 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <errno.h> #include <fcntl.h> #include <inttypes.h> #include <limits.h> #include <stdarg.h> #include <stddef.h> #include <stdio.h> #include <string.h> #include <sys/signalfd.h> #include <sys/socket.h> #include <sys/time.h> #include <sys/uio.h> #include <sys/un.h> #include <time.h> #include <unistd.h> #include "sd-messages.h" #include "alloc-util.h" #include "fd-util.h" #include "formats-util.h" #include "io-util.h" #include "log.h" #include "macro.h" #include "missing.h" #include "parse-util.h" #include "proc-cmdline.h" #include "process-util.h" #include "signal-util.h" #include "socket-util.h" #include "stdio-util.h" #include "string-table.h" #include "string-util.h" #include "syslog-util.h" #include "terminal-util.h" #include "time-util.h" #include "util.h" #define SNDBUF_SIZE (8*1024*1024) static LogTarget log_target = LOG_TARGET_CONSOLE; static int log_max_level = LOG_INFO; static int log_facility = LOG_DAEMON; static int console_fd = STDERR_FILENO; static int syslog_fd = -1; static int kmsg_fd = -1; static int journal_fd = -1; static bool syslog_is_stream = false; static bool show_color = false; static bool show_location = false; static bool upgrade_syslog_to_journal = false; /* Akin to glibc's __abort_msg; which is private and we hence cannot * use here. */ static char *log_abort_msg = NULL; void log_close_console(void) { if (console_fd < 0) return; if (getpid() == 1) { if (console_fd >= 3) safe_close(console_fd); console_fd = -1; } } static int log_open_console(void) { if (console_fd >= 0) return 0; if (getpid() == 1) { console_fd = open_terminal("/dev/console", O_WRONLY|O_NOCTTY|O_CLOEXEC); if (console_fd < 0) return console_fd; } else console_fd = STDERR_FILENO; return 0; } void log_close_kmsg(void) { kmsg_fd = safe_close(kmsg_fd); } static int log_open_kmsg(void) { if (kmsg_fd >= 0) return 0; kmsg_fd = open("/dev/kmsg", O_WRONLY|O_NOCTTY|O_CLOEXEC); if (kmsg_fd < 0) return -errno; return 0; } void log_close_syslog(void) { syslog_fd = safe_close(syslog_fd); } static int create_log_socket(int type) { struct timeval tv; int fd; fd = socket(AF_UNIX, type|SOCK_CLOEXEC, 0); if (fd < 0) return -errno; fd_inc_sndbuf(fd, SNDBUF_SIZE); /* We need a blocking fd here since we'd otherwise lose messages way too early. However, let's not hang forever in the unlikely case of a deadlock. */ if (getpid() == 1) timeval_store(&tv, 10 * USEC_PER_MSEC); else timeval_store(&tv, 10 * USEC_PER_SEC); (void) setsockopt(fd, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); return fd; } static int log_open_syslog(void) { static const union sockaddr_union sa = { .un.sun_family = AF_UNIX, .un.sun_path = "/dev/log", }; int r; if (syslog_fd >= 0) return 0; syslog_fd = create_log_socket(SOCK_DGRAM); if (syslog_fd < 0) { r = syslog_fd; goto fail; } if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { safe_close(syslog_fd); /* Some legacy syslog systems still use stream * sockets. They really shouldn't. But what can we * do... */ syslog_fd = create_log_socket(SOCK_STREAM); if (syslog_fd < 0) { r = syslog_fd; goto fail; } if (connect(syslog_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { r = -errno; goto fail; } syslog_is_stream = true; } else syslog_is_stream = false; return 0; fail: log_close_syslog(); return r; } void log_close_journal(void) { journal_fd = safe_close(journal_fd); } static int log_open_journal(void) { static const union sockaddr_union sa = { .un.sun_family = AF_UNIX, .un.sun_path = "/run/systemd/journal/socket", }; int r; if (journal_fd >= 0) return 0; journal_fd = create_log_socket(SOCK_DGRAM); if (journal_fd < 0) { r = journal_fd; goto fail; } if (connect(journal_fd, &sa.sa, offsetof(struct sockaddr_un, sun_path) + strlen(sa.un.sun_path)) < 0) { r = -errno; goto fail; } return 0; fail: log_close_journal(); return r; } int log_open(void) { int r; /* If we don't use the console we close it here, to not get * killed by SAK. If we don't use syslog we close it here so * that we are not confused by somebody deleting the socket in * the fs. If we don't use /dev/kmsg we still keep it open, * because there is no reason to close it. */ if (log_target == LOG_TARGET_NULL) { log_close_journal(); log_close_syslog(); log_close_console(); return 0; } if ((log_target != LOG_TARGET_AUTO && log_target != LOG_TARGET_SAFE) || getpid() == 1 || isatty(STDERR_FILENO) <= 0) { if (log_target == LOG_TARGET_AUTO || log_target == LOG_TARGET_JOURNAL_OR_KMSG || log_target == LOG_TARGET_JOURNAL) { r = log_open_journal(); if (r >= 0) { log_close_syslog(); log_close_console(); return r; } } if (log_target == LOG_TARGET_SYSLOG_OR_KMSG || log_target == LOG_TARGET_SYSLOG) { r = log_open_syslog(); if (r >= 0) { log_close_journal(); log_close_console(); return r; } } if (log_target == LOG_TARGET_AUTO || log_target == LOG_TARGET_SAFE || log_target == LOG_TARGET_JOURNAL_OR_KMSG || log_target == LOG_TARGET_SYSLOG_OR_KMSG || log_target == LOG_TARGET_KMSG) { r = log_open_kmsg(); if (r >= 0) { log_close_journal(); log_close_syslog(); log_close_console(); return r; } } } log_close_journal(); log_close_syslog(); return log_open_console(); } void log_set_target(LogTarget target) { assert(target >= 0); assert(target < _LOG_TARGET_MAX); if (upgrade_syslog_to_journal) { if (target == LOG_TARGET_SYSLOG) target = LOG_TARGET_JOURNAL; else if (target == LOG_TARGET_SYSLOG_OR_KMSG) target = LOG_TARGET_JOURNAL_OR_KMSG; } log_target = target; } void log_close(void) { log_close_journal(); log_close_syslog(); log_close_kmsg(); log_close_console(); } void log_forget_fds(void) { console_fd = kmsg_fd = syslog_fd = journal_fd = -1; } void log_set_max_level(int level) { assert((level & LOG_PRIMASK) == level); log_max_level = level; } void log_set_facility(int facility) { log_facility = facility; } static int write_to_console( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *buffer) { char location[64], prefix[1 + DECIMAL_STR_MAX(int) + 2]; struct iovec iovec[6] = {}; unsigned n = 0; bool highlight; if (console_fd < 0) return 0; if (log_target == LOG_TARGET_CONSOLE_PREFIXED) { sprintf(prefix, "<%i>", level); IOVEC_SET_STRING(iovec[n++], prefix); } highlight = LOG_PRI(level) <= LOG_ERR && show_color; if (show_location) { snprintf(location, sizeof(location), "(%s:%i) ", file, line); IOVEC_SET_STRING(iovec[n++], location); } if (highlight) IOVEC_SET_STRING(iovec[n++], ANSI_HIGHLIGHT_RED); IOVEC_SET_STRING(iovec[n++], buffer); if (highlight) IOVEC_SET_STRING(iovec[n++], ANSI_NORMAL); IOVEC_SET_STRING(iovec[n++], "\n"); if (writev(console_fd, iovec, n) < 0) { if (errno == EIO && getpid() == 1) { /* If somebody tried to kick us from our * console tty (via vhangup() or suchlike), * try to reconnect */ log_close_console(); log_open_console(); if (console_fd < 0) return 0; if (writev(console_fd, iovec, n) < 0) return -errno; } else return -errno; } return 1; } static int write_to_syslog( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *buffer) { char header_priority[2 + DECIMAL_STR_MAX(int) + 1], header_time[64], header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1]; struct iovec iovec[5] = {}; struct msghdr msghdr = { .msg_iov = iovec, .msg_iovlen = ELEMENTSOF(iovec), }; time_t t; struct tm *tm; if (syslog_fd < 0) return 0; xsprintf(header_priority, "<%i>", level); t = (time_t) (now(CLOCK_REALTIME) / USEC_PER_SEC); tm = localtime(&t); if (!tm) return -EINVAL; if (strftime(header_time, sizeof(header_time), "%h %e %T ", tm) <= 0) return -EINVAL; xsprintf(header_pid, "["PID_FMT"]: ", getpid()); IOVEC_SET_STRING(iovec[0], header_priority); IOVEC_SET_STRING(iovec[1], header_time); IOVEC_SET_STRING(iovec[2], program_invocation_short_name); IOVEC_SET_STRING(iovec[3], header_pid); IOVEC_SET_STRING(iovec[4], buffer); /* When using syslog via SOCK_STREAM separate the messages by NUL chars */ if (syslog_is_stream) iovec[4].iov_len++; for (;;) { ssize_t n; n = sendmsg(syslog_fd, &msghdr, MSG_NOSIGNAL); if (n < 0) return -errno; if (!syslog_is_stream || (size_t) n >= IOVEC_TOTAL_SIZE(iovec, ELEMENTSOF(iovec))) break; IOVEC_INCREMENT(iovec, ELEMENTSOF(iovec), n); } return 1; } static int write_to_kmsg( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *buffer) { char header_priority[2 + DECIMAL_STR_MAX(int) + 1], header_pid[4 + DECIMAL_STR_MAX(pid_t) + 1]; struct iovec iovec[5] = {}; if (kmsg_fd < 0) return 0; xsprintf(header_priority, "<%i>", level); xsprintf(header_pid, "["PID_FMT"]: ", getpid()); IOVEC_SET_STRING(iovec[0], header_priority); IOVEC_SET_STRING(iovec[1], program_invocation_short_name); IOVEC_SET_STRING(iovec[2], header_pid); IOVEC_SET_STRING(iovec[3], buffer); IOVEC_SET_STRING(iovec[4], "\n"); if (writev(kmsg_fd, iovec, ELEMENTSOF(iovec)) < 0) return -errno; return 1; } static int log_do_header( char *header, size_t size, int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object) { snprintf(header, size, "PRIORITY=%i\n" "SYSLOG_FACILITY=%i\n" "%s%s%s" "%s%.*i%s" "%s%s%s" "%s%.*i%s" "%s%s%s" "SYSLOG_IDENTIFIER=%s\n", LOG_PRI(level), LOG_FAC(level), isempty(file) ? "" : "CODE_FILE=", isempty(file) ? "" : file, isempty(file) ? "" : "\n", line ? "CODE_LINE=" : "", line ? 1 : 0, line, /* %.0d means no output too, special case for 0 */ line ? "\n" : "", isempty(func) ? "" : "CODE_FUNCTION=", isempty(func) ? "" : func, isempty(func) ? "" : "\n", error ? "ERRNO=" : "", error ? 1 : 0, error, error ? "\n" : "", isempty(object) ? "" : object_field, isempty(object) ? "" : object, isempty(object) ? "" : "\n", program_invocation_short_name); return 0; } static int write_to_journal( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *buffer) { char header[LINE_MAX]; struct iovec iovec[4] = {}; struct msghdr mh = {}; if (journal_fd < 0) return 0; log_do_header(header, sizeof(header), level, error, file, line, func, object_field, object); IOVEC_SET_STRING(iovec[0], header); IOVEC_SET_STRING(iovec[1], "MESSAGE="); IOVEC_SET_STRING(iovec[2], buffer); IOVEC_SET_STRING(iovec[3], "\n"); mh.msg_iov = iovec; mh.msg_iovlen = ELEMENTSOF(iovec); if (sendmsg(journal_fd, &mh, MSG_NOSIGNAL) < 0) return -errno; return 1; } static int log_dispatch( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, char *buffer) { assert(buffer); if (log_target == LOG_TARGET_NULL) return -error; /* Patch in LOG_DAEMON facility if necessary */ if ((level & LOG_FACMASK) == 0) level = log_facility | LOG_PRI(level); if (error < 0) error = -error; do { char *e; int k = 0; buffer += strspn(buffer, NEWLINE); if (buffer[0] == 0) break; if ((e = strpbrk(buffer, NEWLINE))) *(e++) = 0; if (log_target == LOG_TARGET_AUTO || log_target == LOG_TARGET_JOURNAL_OR_KMSG || log_target == LOG_TARGET_JOURNAL) { k = write_to_journal(level, error, file, line, func, object_field, object, buffer); if (k < 0) { if (k != -EAGAIN) log_close_journal(); log_open_kmsg(); } } if (log_target == LOG_TARGET_SYSLOG_OR_KMSG || log_target == LOG_TARGET_SYSLOG) { k = write_to_syslog(level, error, file, line, func, object_field, object, buffer); if (k < 0) { if (k != -EAGAIN) log_close_syslog(); log_open_kmsg(); } } if (k <= 0 && (log_target == LOG_TARGET_AUTO || log_target == LOG_TARGET_SAFE || log_target == LOG_TARGET_SYSLOG_OR_KMSG || log_target == LOG_TARGET_JOURNAL_OR_KMSG || log_target == LOG_TARGET_KMSG)) { k = write_to_kmsg(level, error, file, line, func, object_field, object, buffer); if (k < 0) { log_close_kmsg(); log_open_console(); } } if (k <= 0) (void) write_to_console(level, error, file, line, func, object_field, object, buffer); buffer = e; } while (buffer); return -error; } int log_dump_internal( int level, int error, const char *file, int line, const char *func, char *buffer) { PROTECT_ERRNO; /* This modifies the buffer... */ if (error < 0) error = -error; if (_likely_(LOG_PRI(level) > log_max_level)) return -error; return log_dispatch(level, error, file, line, func, NULL, NULL, buffer); } int log_internalv( int level, int error, const char *file, int line, const char *func, const char *format, va_list ap) { PROTECT_ERRNO; char buffer[LINE_MAX]; if (error < 0) error = -error; if (_likely_(LOG_PRI(level) > log_max_level)) return -error; /* Make sure that %m maps to the specified error */ if (error != 0) errno = error; vsnprintf(buffer, sizeof(buffer), format, ap); return log_dispatch(level, error, file, line, func, NULL, NULL, buffer); } int log_internal( int level, int error, const char *file, int line, const char *func, const char *format, ...) { va_list ap; int r; va_start(ap, format); r = log_internalv(level, error, file, line, func, format, ap); va_end(ap); return r; } int log_object_internalv( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *format, va_list ap) { PROTECT_ERRNO; char *buffer, *b; size_t l; if (error < 0) error = -error; if (_likely_(LOG_PRI(level) > log_max_level)) return -error; /* Make sure that %m maps to the specified error */ if (error != 0) errno = error; /* Prepend the object name before the message */ if (object) { size_t n; n = strlen(object); l = n + 2 + LINE_MAX; buffer = newa(char, l); b = stpcpy(stpcpy(buffer, object), ": "); } else { l = LINE_MAX; b = buffer = newa(char, l); } vsnprintf(b, l, format, ap); return log_dispatch(level, error, file, line, func, object_field, object, buffer); } int log_object_internal( int level, int error, const char *file, int line, const char *func, const char *object_field, const char *object, const char *format, ...) { va_list ap; int r; va_start(ap, format); r = log_object_internalv(level, error, file, line, func, object_field, object, format, ap); va_end(ap); return r; } static void log_assert( int level, const char *text, const char *file, int line, const char *func, const char *format) { static char buffer[LINE_MAX]; if (_likely_(LOG_PRI(level) > log_max_level)) return; DISABLE_WARNING_FORMAT_NONLITERAL; snprintf(buffer, sizeof(buffer), format, text, file, line, func); REENABLE_WARNING; log_abort_msg = buffer; log_dispatch(level, 0, file, line, func, NULL, NULL, buffer); } noreturn void log_assert_failed(const char *text, const char *file, int line, const char *func) { log_assert(LOG_CRIT, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Aborting."); abort(); } noreturn void log_assert_failed_unreachable(const char *text, const char *file, int line, const char *func) { log_assert(LOG_CRIT, text, file, line, func, "Code should not be reached '%s' at %s:%u, function %s(). Aborting."); abort(); } void log_assert_failed_return(const char *text, const char *file, int line, const char *func) { PROTECT_ERRNO; log_assert(LOG_DEBUG, text, file, line, func, "Assertion '%s' failed at %s:%u, function %s(). Ignoring."); } int log_oom_internal(const char *file, int line, const char *func) { log_internal(LOG_ERR, ENOMEM, file, line, func, "Out of memory."); return -ENOMEM; } int log_struct_internal( int level, int error, const char *file, int line, const char *func, const char *format, ...) { char buf[LINE_MAX]; bool found = false; PROTECT_ERRNO; va_list ap; if (error < 0) error = -error; if (_likely_(LOG_PRI(level) > log_max_level)) return -error; if (log_target == LOG_TARGET_NULL) return -error; if ((level & LOG_FACMASK) == 0) level = log_facility | LOG_PRI(level); if ((log_target == LOG_TARGET_AUTO || log_target == LOG_TARGET_JOURNAL_OR_KMSG || log_target == LOG_TARGET_JOURNAL) && journal_fd >= 0) { char header[LINE_MAX]; struct iovec iovec[17] = {}; unsigned n = 0, i; struct msghdr mh = { .msg_iov = iovec, }; static const char nl = '\n'; bool fallback = false; /* If the journal is available do structured logging */ log_do_header(header, sizeof(header), level, error, file, line, func, NULL, NULL); IOVEC_SET_STRING(iovec[n++], header); va_start(ap, format); while (format && n + 1 < ELEMENTSOF(iovec)) { va_list aq; char *m; /* We need to copy the va_list structure, * since vasprintf() leaves it afterwards at * an undefined location */ if (error != 0) errno = error; va_copy(aq, ap); if (vasprintf(&m, format, aq) < 0) { va_end(aq); fallback = true; goto finish; } va_end(aq); /* Now, jump enough ahead, so that we point to * the next format string */ VA_FORMAT_ADVANCE(format, ap); IOVEC_SET_STRING(iovec[n++], m); iovec[n].iov_base = (char*) &nl; iovec[n].iov_len = 1; n++; format = va_arg(ap, char *); } mh.msg_iovlen = n; (void) sendmsg(journal_fd, &mh, MSG_NOSIGNAL); finish: va_end(ap); for (i = 1; i < n; i += 2) free(iovec[i].iov_base); if (!fallback) return -error; } /* Fallback if journal logging is not available or didn't work. */ va_start(ap, format); while (format) { va_list aq; if (error != 0) errno = error; va_copy(aq, ap); vsnprintf(buf, sizeof(buf), format, aq); va_end(aq); if (startswith(buf, "MESSAGE=")) { found = true; break; } VA_FORMAT_ADVANCE(format, ap); format = va_arg(ap, char *); } va_end(ap); if (!found) return -error; return log_dispatch(level, error, file, line, func, NULL, NULL, buf + 8); } int log_set_target_from_string(const char *e) { LogTarget t; t = log_target_from_string(e); if (t < 0) return -EINVAL; log_set_target(t); return 0; } int log_set_max_level_from_string(const char *e) { int t; t = log_level_from_string(e); if (t < 0) return -EINVAL; log_set_max_level(t); return 0; } static int parse_proc_cmdline_item(const char *key, const char *value) { /* * The systemd.log_xyz= settings are parsed by all tools, and * so is "debug". * * However, "quiet" is only parsed by PID 1, and only turns of * status output to /dev/console, but does not alter the log * level. */ if (streq(key, "debug") && !value) log_set_max_level(LOG_DEBUG); else if (streq(key, "systemd.log_target") && value) { if (log_set_target_from_string(value) < 0) log_warning("Failed to parse log target '%s'. Ignoring.", value); } else if (streq(key, "systemd.log_level") && value) { if (log_set_max_level_from_string(value) < 0) log_warning("Failed to parse log level '%s'. Ignoring.", value); } else if (streq(key, "systemd.log_color") && value) { if (log_show_color_from_string(value) < 0) log_warning("Failed to parse log color setting '%s'. Ignoring.", value); } else if (streq(key, "systemd.log_location") && value) { if (log_show_location_from_string(value) < 0) log_warning("Failed to parse log location setting '%s'. Ignoring.", value); } return 0; } void log_parse_environment(void) { const char *e; if (get_ctty_devnr(0, NULL) < 0) /* Only try to read the command line in daemons. We assume that anything that has a controlling tty is user stuff. */ (void) parse_proc_cmdline(parse_proc_cmdline_item); e = secure_getenv("SYSTEMD_LOG_TARGET"); if (e && log_set_target_from_string(e) < 0) log_warning("Failed to parse log target '%s'. Ignoring.", e); e = secure_getenv("SYSTEMD_LOG_LEVEL"); if (e && log_set_max_level_from_string(e) < 0) log_warning("Failed to parse log level '%s'. Ignoring.", e); e = secure_getenv("SYSTEMD_LOG_COLOR"); if (e && log_show_color_from_string(e) < 0) log_warning("Failed to parse bool '%s'. Ignoring.", e); e = secure_getenv("SYSTEMD_LOG_LOCATION"); if (e && log_show_location_from_string(e) < 0) log_warning("Failed to parse bool '%s'. Ignoring.", e); } LogTarget log_get_target(void) { return log_target; } int log_get_max_level(void) { return log_max_level; } void log_show_color(bool b) { show_color = b; } bool log_get_show_color(void) { return show_color; } void log_show_location(bool b) { show_location = b; } bool log_get_show_location(void) { return show_location; } int log_show_color_from_string(const char *e) { int t; t = parse_boolean(e); if (t < 0) return t; log_show_color(t); return 0; } int log_show_location_from_string(const char *e) { int t; t = parse_boolean(e); if (t < 0) return t; log_show_location(t); return 0; } bool log_on_console(void) { if (log_target == LOG_TARGET_CONSOLE || log_target == LOG_TARGET_CONSOLE_PREFIXED) return true; return syslog_fd < 0 && kmsg_fd < 0 && journal_fd < 0; } static const char *const log_target_table[_LOG_TARGET_MAX] = { [LOG_TARGET_CONSOLE] = "console", [LOG_TARGET_CONSOLE_PREFIXED] = "console-prefixed", [LOG_TARGET_KMSG] = "kmsg", [LOG_TARGET_JOURNAL] = "journal", [LOG_TARGET_JOURNAL_OR_KMSG] = "journal-or-kmsg", [LOG_TARGET_SYSLOG] = "syslog", [LOG_TARGET_SYSLOG_OR_KMSG] = "syslog-or-kmsg", [LOG_TARGET_AUTO] = "auto", [LOG_TARGET_SAFE] = "safe", [LOG_TARGET_NULL] = "null" }; DEFINE_STRING_TABLE_LOOKUP(log_target, LogTarget); void log_received_signal(int level, const struct signalfd_siginfo *si) { if (si->ssi_pid > 0) { _cleanup_free_ char *p = NULL; get_process_comm(si->ssi_pid, &p); log_full(level, "Received SIG%s from PID %"PRIu32" (%s).", signal_to_string(si->ssi_signo), si->ssi_pid, strna(p)); } else log_full(level, "Received SIG%s.", signal_to_string(si->ssi_signo)); } void log_set_upgrade_syslog_to_journal(bool b) { upgrade_syslog_to_journal = b; } int log_syntax_internal( const char *unit, int level, const char *config_file, unsigned config_line, int error, const char *file, int line, const char *func, const char *format, ...) { PROTECT_ERRNO; char buffer[LINE_MAX]; int r; va_list ap; if (error < 0) error = -error; if (_likely_(LOG_PRI(level) > log_max_level)) return -error; if (log_target == LOG_TARGET_NULL) return -error; if (error != 0) errno = error; va_start(ap, format); vsnprintf(buffer, sizeof(buffer), format, ap); va_end(ap); if (unit) r = log_struct_internal( level, error, file, line, func, getpid() == 1 ? "UNIT=%s" : "USER_UNIT=%s", unit, LOG_MESSAGE_ID(SD_MESSAGE_INVALID_CONFIGURATION), "CONFIG_FILE=%s", config_file, "CONFIG_LINE=%u", config_line, LOG_MESSAGE("[%s:%u] %s", config_file, config_line, buffer), NULL); else r = log_struct_internal( level, error, file, line, func, LOG_MESSAGE_ID(SD_MESSAGE_INVALID_CONFIGURATION), "CONFIG_FILE=%s", config_file, "CONFIG_LINE=%u", config_line, LOG_MESSAGE("[%s:%u] %s", config_file, config_line, buffer), NULL); return r; }