static int stdout_stream_new(sd_event_source *es, int listen_fd, uint32_t revents, void *userdata) { _cleanup_close_ int fd = -1; Server *s = userdata; int r; assert(s); if (revents != EPOLLIN) { log_error("Got invalid event from epoll for stdout server fd: %"PRIx32, revents); return -EIO; } fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC); if (fd < 0) { if (errno == EAGAIN) return 0; return log_error_errno(errno, "Failed to accept stdout connection: %m"); } if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) { struct ucred u; r = getpeercred(fd, &u); /* By closing fd here we make sure that the client won't wait too long for journald to * gather all the data it adds to the error message to find out that the connection has * just been refused. */ fd = safe_close(fd); server_driver_message(s, r < 0 ? 0 : u.pid, NULL, LOG_MESSAGE("Too many stdout streams, refusing connection."), NULL); return 0; } r = stdout_stream_install(s, fd, NULL); if (r < 0) return r; fd = -1; return 0; }
int main(int argc, char *argv[]) { Server server; int r; if (argc > 1) { log_error("This program does not take arguments."); return EXIT_FAILURE; } log_set_target(LOG_TARGET_SAFE); log_set_facility(LOG_SYSLOG); log_parse_environment(); log_open(); umask(0022); sigbus_install(); r = server_init(&server); if (r < 0) goto finish; server_vacuum(&server, false); server_flush_to_var(&server, true); server_flush_dev_kmsg(&server); log_debug("systemd-journald running as pid "PID_FMT, getpid_cached()); server_driver_message(&server, 0, "MESSAGE_ID=" SD_MESSAGE_JOURNAL_START_STR, LOG_MESSAGE("Journal started"), NULL); /* Make sure to send the usage message *after* flushing the * journal so entries from the runtime journals are ordered * before this message. See #4190 for some details. */ server_space_usage_message(&server, NULL); for (;;) { usec_t t = USEC_INFINITY, n; r = sd_event_get_state(server.event); if (r < 0) goto finish; if (r == SD_EVENT_FINISHED) break; n = now(CLOCK_REALTIME); if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) { /* The retention time is reached, so let's vacuum! */ if (server.oldest_file_usec + server.max_retention_usec < n) { log_info("Retention time reached."); server_rotate(&server); server_vacuum(&server, false); continue; } /* Calculate when to rotate the next time */ t = server.oldest_file_usec + server.max_retention_usec - n; } #if HAVE_GCRYPT if (server.system_journal) { usec_t u; if (journal_file_next_evolve_usec(server.system_journal, &u)) { if (n >= u) t = 0; else t = MIN(t, u - n); } } #endif r = sd_event_run(server.event, t); if (r < 0) { log_error_errno(r, "Failed to run event loop: %m"); goto finish; } server_maybe_append_tags(&server); server_maybe_warn_forward_syslog_missed(&server); } log_debug("systemd-journald stopped as pid "PID_FMT, getpid_cached()); server_driver_message(&server, 0, "MESSAGE_ID=" SD_MESSAGE_JOURNAL_STOP_STR, LOG_MESSAGE("Journal stopped"), NULL); finish: server_done(&server); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }
static void dev_kmsg_record(Server *s, const char *p, size_t l) { _cleanup_free_ char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL, *identifier = NULL, *pid = NULL; struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS + 2 + N_IOVEC_UDEV_FIELDS]; char *kernel_device = NULL; unsigned long long usec; size_t n = 0, z = 0, j; int priority, r; char *e, *f, *k; uint64_t serial; size_t pl; assert(s); assert(p); if (l <= 0) return; e = memchr(p, ',', l); if (!e) return; *e = 0; r = safe_atoi(p, &priority); if (r < 0 || priority < 0 || priority > 999) return; if (s->forward_to_kmsg && (priority & LOG_FACMASK) != LOG_KERN) return; l -= (e - p) + 1; p = e + 1; e = memchr(p, ',', l); if (!e) return; *e = 0; r = safe_atou64(p, &serial); if (r < 0) return; if (s->kernel_seqnum) { /* We already read this one? */ if (serial < *s->kernel_seqnum) return; /* Did we lose any? */ if (serial > *s->kernel_seqnum) server_driver_message(s, 0, "MESSAGE_ID=" SD_MESSAGE_JOURNAL_MISSED_STR, LOG_MESSAGE("Missed %"PRIu64" kernel messages", serial - *s->kernel_seqnum), NULL); /* Make sure we never read this one again. Note that * we always store the next message serial we expect * here, simply because this makes handling the first * message with serial 0 easy. */ *s->kernel_seqnum = serial + 1; } l -= (e - p) + 1; p = e + 1; f = memchr(p, ';', l); if (!f) return; /* Kernel 3.6 has the flags field, kernel 3.5 lacks that */ e = memchr(p, ',', l); if (!e || f < e) e = f; *e = 0; r = safe_atollu(p, &usec); if (r < 0) return; l -= (f - p) + 1; p = f + 1; e = memchr(p, '\n', l); if (!e) return; *e = 0; pl = e - p; l -= (e - p) + 1; k = e + 1; for (j = 0; l > 0 && j < N_IOVEC_KERNEL_FIELDS; j++) { char *m; /* Metadata fields attached */ if (*k != ' ') break; k++, l--; e = memchr(k, '\n', l); if (!e) return; *e = 0; if (cunescape_length_with_prefix(k, e - k, "_KERNEL_", UNESCAPE_RELAX, &m) < 0) break; if (startswith(m, "_KERNEL_DEVICE=")) kernel_device = m + 15; iovec[n++] = IOVEC_MAKE_STRING(m); z++; l -= (e - k) + 1; k = e + 1; } if (kernel_device) { struct udev_device *ud; ud = udev_device_new_from_device_id(s->udev, kernel_device); if (ud) { const char *g; struct udev_list_entry *ll; char *b; g = udev_device_get_devnode(ud); if (g) { b = strappend("_UDEV_DEVNODE=", g); if (b) { iovec[n++] = IOVEC_MAKE_STRING(b); z++; } } g = udev_device_get_sysname(ud); if (g) { b = strappend("_UDEV_SYSNAME=", g); if (b) { iovec[n++] = IOVEC_MAKE_STRING(b); z++; } } j = 0; ll = udev_device_get_devlinks_list_entry(ud); udev_list_entry_foreach(ll, ll) { if (j > N_IOVEC_UDEV_FIELDS) break; g = udev_list_entry_get_name(ll); if (g) { b = strappend("_UDEV_DEVLINK=", g); if (b) { iovec[n++] = IOVEC_MAKE_STRING(b); z++; } } j++; } udev_device_unref(ud); } } if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu", usec) >= 0) iovec[n++] = IOVEC_MAKE_STRING(source_time); iovec[n++] = IOVEC_MAKE_STRING("_TRANSPORT=kernel"); if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0) iovec[n++] = IOVEC_MAKE_STRING(syslog_priority); if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0) iovec[n++] = IOVEC_MAKE_STRING(syslog_facility); if ((priority & LOG_FACMASK) == LOG_KERN) iovec[n++] = IOVEC_MAKE_STRING("SYSLOG_IDENTIFIER=kernel"); else { pl -= syslog_parse_identifier((const char**) &p, &identifier, &pid); /* Avoid any messages we generated ourselves via * log_info() and friends. */ if (pid && is_us(pid)) goto finish; if (identifier) { syslog_identifier = strappend("SYSLOG_IDENTIFIER=", identifier); if (syslog_identifier) iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier); } if (pid) { syslog_pid = strappend("SYSLOG_PID=", pid); if (syslog_pid) iovec[n++] = IOVEC_MAKE_STRING(syslog_pid); } } if (cunescape_length_with_prefix(p, pl, "MESSAGE=", UNESCAPE_RELAX, &message) >= 0) iovec[n++] = IOVEC_MAKE_STRING(message); server_dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, priority, 0); finish: for (j = 0; j < z; j++) free(iovec[j].iov_base); }
int main(int argc, char *argv[]) { Server server; int r; /* if (getppid() != 1) { */ /* log_error("This program should be invoked by init only."); */ /* return EXIT_FAILURE; */ /* } */ if (argc > 1) { log_error("This program does not take arguments."); return EXIT_FAILURE; } log_set_target(LOG_TARGET_SAFE); log_set_facility(LOG_SYSLOG); log_parse_environment(); log_open(); umask(0022); r = server_init(&server); if (r < 0) goto finish; server_vacuum(&server); server_flush_to_var(&server); server_flush_dev_kmsg(&server); log_debug("systemd-journald running as pid %lu", (unsigned long) getpid()); server_driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started"); sd_notify(false, "READY=1\n" "STATUS=Processing requests..."); for (;;) { struct epoll_event event; int t = -1; usec_t n; n = now(CLOCK_REALTIME); if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) { /* The retention time is reached, so let's vacuum! */ if (server.oldest_file_usec + server.max_retention_usec < n) { log_info("Retention time reached."); server_rotate(&server); server_vacuum(&server); continue; } /* Calculate when to rotate the next time */ t = (int) ((server.oldest_file_usec + server.max_retention_usec - n + USEC_PER_MSEC - 1) / USEC_PER_MSEC); log_info("Sleeping for %i ms", t); } #ifdef HAVE_GCRYPT if (server.system_journal) { usec_t u; if (journal_file_next_evolve_usec(server.system_journal, &u)) { if (n >= u) t = 0; else t = MIN(t, (int) ((u - n + USEC_PER_MSEC - 1) / USEC_PER_MSEC)); } } #endif r = epoll_wait(server.epoll_fd, &event, 1, t); if (r < 0) { if (errno == EINTR) continue; log_error("epoll_wait() failed: %m"); r = -errno; goto finish; } if (r > 0) { r = process_event(&server, &event); if (r < 0) goto finish; else if (r == 0) break; } server_maybe_append_tags(&server); server_maybe_warn_forward_syslog_missed(&server); } log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid()); server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped"); finish: sd_notify(false, "STATUS=Shutting down..."); server_done(&server); return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }