- http://pubs.opengroup.org/onlinepubs/000095399/basedefs/xbd_chap08.html */
-
- /* No empty field names */
- if (l <= 0)
- return false;
-
- /* Don't allow names longer than 64 chars */
- if (l > 64)
- return false;
-
- /* Variables starting with an underscore are protected */
- if (p[0] == '_')
- return false;
-
- /* Don't allow digits as first character */
- if (p[0] >= '0' && p[0] <= '9')
- return false;
-
- /* Only allow A-Z0-9 and '_' */
- for (a = p; a < p + l; a++)
- if (!((*a >= 'A' && *a <= 'Z') ||
- (*a >= '0' && *a <= '9') ||
- *a == '_'))
- return false;
-
- return true;
-}
-
-static void process_native_message(
- Server *s,
- const void *buffer, size_t buffer_size,
- struct ucred *ucred,
- struct timeval *tv,
- const char *label, size_t label_len) {
-
- struct iovec *iovec = NULL;
- unsigned n = 0, m = 0, j, tn = (unsigned) -1;
- const char *p;
- size_t remaining;
- int priority = LOG_INFO;
- char *identifier = NULL, *message = NULL;
-
- assert(s);
- assert(buffer || buffer_size == 0);
-
- p = buffer;
- remaining = buffer_size;
-
- while (remaining > 0) {
- const char *e, *q;
-
- e = memchr(p, '\n', remaining);
-
- if (!e) {
- /* Trailing noise, let's ignore it, and flush what we collected */
- log_debug("Received message with trailing noise, ignoring.");
- break;
- }
-
- if (e == p) {
- /* Entry separator */
- dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority);
- n = 0;
- priority = LOG_INFO;
-
- p++;
- remaining--;
- continue;
- }
-
- if (*p == '.' || *p == '#') {
- /* Ignore control commands for now, and
- * comments too. */
- remaining -= (e - p) + 1;
- p = e + 1;
- continue;
- }
-
- /* A property follows */
-
- if (n+N_IOVEC_META_FIELDS >= m) {
- struct iovec *c;
- unsigned u;
-
- u = MAX((n+N_IOVEC_META_FIELDS+1) * 2U, 4U);
- c = realloc(iovec, u * sizeof(struct iovec));
- if (!c) {
- log_oom();
- break;
- }
-
- iovec = c;
- m = u;
- }
-
- q = memchr(p, '=', e - p);
- if (q) {
- if (valid_user_field(p, q - p)) {
- size_t l;
-
- l = e - p;
-
- /* If the field name starts with an
- * underscore, skip the variable,
- * since that indidates a trusted
- * field */
- iovec[n].iov_base = (char*) p;
- iovec[n].iov_len = l;
- n++;
-
- /* We need to determine the priority
- * of this entry for the rate limiting
- * logic */
- if (l == 10 &&
- memcmp(p, "PRIORITY=", 9) == 0 &&
- p[9] >= '0' && p[9] <= '9')
- priority = (priority & LOG_FACMASK) | (p[9] - '0');
-
- else if (l == 17 &&
- memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
- p[16] >= '0' && p[16] <= '9')
- priority = (priority & LOG_PRIMASK) | ((p[16] - '0') << 3);
-
- else if (l == 18 &&
- memcmp(p, "SYSLOG_FACILITY=", 16) == 0 &&
- p[16] >= '0' && p[16] <= '9' &&
- p[17] >= '0' && p[17] <= '9')
- priority = (priority & LOG_PRIMASK) | (((p[16] - '0')*10 + (p[17] - '0')) << 3);
-
- else if (l >= 19 &&
- memcmp(p, "SYSLOG_IDENTIFIER=", 18) == 0) {
- char *t;
-
- t = strndup(p + 18, l - 18);
- if (t) {
- free(identifier);
- identifier = t;
- }
- } else if (l >= 8 &&
- memcmp(p, "MESSAGE=", 8) == 0) {
- char *t;
-
- t = strndup(p + 8, l - 8);
- if (t) {
- free(message);
- message = t;
- }
- }
- }
-
- remaining -= (e - p) + 1;
- p = e + 1;
- continue;
- } else {
- le64_t l_le;
- uint64_t l;
- char *k;
-
- if (remaining < e - p + 1 + sizeof(uint64_t) + 1) {
- log_debug("Failed to parse message, ignoring.");
- break;
- }
-
- memcpy(&l_le, e + 1, sizeof(uint64_t));
- l = le64toh(l_le);
-
- if (remaining < e - p + 1 + sizeof(uint64_t) + l + 1 ||
- e[1+sizeof(uint64_t)+l] != '\n') {
- log_debug("Failed to parse message, ignoring.");
- break;
- }
-
- k = malloc((e - p) + 1 + l);
- if (!k) {
- log_oom();
- break;
- }
-
- memcpy(k, p, e - p);
- k[e - p] = '=';
- memcpy(k + (e - p) + 1, e + 1 + sizeof(uint64_t), l);
-
- if (valid_user_field(p, e - p)) {
- iovec[n].iov_base = k;
- iovec[n].iov_len = (e - p) + 1 + l;
- n++;
- } else
- free(k);
-
- remaining -= (e - p) + 1 + sizeof(uint64_t) + l + 1;
- p = e + 1 + sizeof(uint64_t) + l + 1;
- }
- }
-
- if (n <= 0)
- goto finish;
-
- tn = n++;
- IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
-
- if (message) {
- if (s->forward_to_syslog)
- forward_syslog(s, priority, identifier, message, ucred, tv);
-
- if (s->forward_to_kmsg)
- forward_kmsg(s, priority, identifier, message, ucred);
-
- if (s->forward_to_console)
- forward_console(s, priority, identifier, message, ucred);
- }
-
- dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority);
-
-finish:
- for (j = 0; j < n; j++) {
- if (j == tn)
- continue;
-
- if (iovec[j].iov_base < buffer ||
- (const uint8_t*) iovec[j].iov_base >= (const uint8_t*) buffer + buffer_size)
- free(iovec[j].iov_base);
- }
-
- free(iovec);
- free(identifier);
- free(message);
-}
-
-static void process_native_file(
- Server *s,
- int fd,
- struct ucred *ucred,
- struct timeval *tv,
- const char *label, size_t label_len) {
-
- struct stat st;
- void *p;
- ssize_t n;
-
- assert(s);
- assert(fd >= 0);
-
- /* Data is in the passed file, since it didn't fit in a
- * datagram. We can't map the file here, since clients might
- * then truncate it and trigger a SIGBUS for us. So let's
- * stupidly read it */
-
- if (fstat(fd, &st) < 0) {
- log_error("Failed to stat passed file, ignoring: %m");
- return;
- }
-
- if (!S_ISREG(st.st_mode)) {
- log_error("File passed is not regular. Ignoring.");
- return;
- }
-
- if (st.st_size <= 0)
- return;
-
- if (st.st_size > ENTRY_SIZE_MAX) {
- log_error("File passed too large. Ignoring.");
- return;
- }
-
- p = malloc(st.st_size);
- if (!p) {
- log_oom();
- return;
- }
-
- n = pread(fd, p, st.st_size, 0);
- if (n < 0)
- log_error("Failed to read file, ignoring: %s", strerror(-n));
- else if (n > 0)
- process_native_message(s, p, n, ucred, tv, label, label_len);
-
- free(p);
-}
-
-static int stdout_stream_log(StdoutStream *s, const char *p) {
- struct iovec iovec[N_IOVEC_META_FIELDS + 5];
- char *message = NULL, *syslog_priority = NULL, *syslog_facility = NULL, *syslog_identifier = NULL;
- unsigned n = 0;
- int priority;
- char *label = NULL;
- size_t label_len = 0;
-
- assert(s);
- assert(p);
-
- if (isempty(p))
- return 0;
-
- priority = s->priority;
-
- if (s->level_prefix)
- parse_syslog_priority((char**) &p, &priority);
-
- if (s->forward_to_syslog || s->server->forward_to_syslog)
- forward_syslog(s->server, fixup_priority(priority), s->identifier, p, &s->ucred, NULL);
-
- if (s->forward_to_kmsg || s->server->forward_to_kmsg)
- forward_kmsg(s->server, priority, s->identifier, p, &s->ucred);
-
- if (s->forward_to_console || s->server->forward_to_console)
- forward_console(s->server, priority, s->identifier, p, &s->ucred);
-
- IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=stdout");
-
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
-
- if (priority & LOG_FACMASK)
- if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_facility);
-
- if (s->identifier) {
- syslog_identifier = strappend("SYSLOG_IDENTIFIER=", s->identifier);
- if (syslog_identifier)
- IOVEC_SET_STRING(iovec[n++], syslog_identifier);
- }
-
- message = strappend("MESSAGE=", p);
- if (message)
- IOVEC_SET_STRING(iovec[n++], message);
-
-#ifdef HAVE_SELINUX
- if (s->security_context) {
- label = (char*) s->security_context;
- label_len = strlen((char*) s->security_context);
- }
-#endif
-
- dispatch_message(s->server, iovec, n, ELEMENTSOF(iovec), &s->ucred, NULL, label, label_len, s->unit_id, priority);
-
- free(message);
- free(syslog_priority);
- free(syslog_facility);
- free(syslog_identifier);
-
- return 0;
-}
-
-static int stdout_stream_line(StdoutStream *s, char *p) {
- int r;
-
- assert(s);
- assert(p);
-
- p = strstrip(p);
-
- switch (s->state) {
-
- case STDOUT_STREAM_IDENTIFIER:
- if (isempty(p))
- s->identifier = NULL;
- else {
- s->identifier = strdup(p);
- if (!s->identifier)
- return log_oom();
- }
-
- s->state = STDOUT_STREAM_UNIT_ID;
- return 0;
-
- case STDOUT_STREAM_UNIT_ID:
- if (s->ucred.uid == 0) {
- if (isempty(p))
- s->unit_id = NULL;
- else {
- s->unit_id = strdup(p);
- if (!s->unit_id)
- return log_oom();
- }
- }
-
- s->state = STDOUT_STREAM_PRIORITY;
- return 0;
-
- case STDOUT_STREAM_PRIORITY:
- r = safe_atoi(p, &s->priority);
- if (r < 0 || s->priority <= 0 || s->priority >= 999) {
- log_warning("Failed to parse log priority line.");
- return -EINVAL;
- }
-
- s->state = STDOUT_STREAM_LEVEL_PREFIX;
- return 0;
-
- case STDOUT_STREAM_LEVEL_PREFIX:
- r = parse_boolean(p);
- if (r < 0) {
- log_warning("Failed to parse level prefix line.");
- return -EINVAL;
- }
-
- s->level_prefix = !!r;
- s->state = STDOUT_STREAM_FORWARD_TO_SYSLOG;
- return 0;
-
- case STDOUT_STREAM_FORWARD_TO_SYSLOG:
- r = parse_boolean(p);
- if (r < 0) {
- log_warning("Failed to parse forward to syslog line.");
- return -EINVAL;
- }
-
- s->forward_to_syslog = !!r;
- s->state = STDOUT_STREAM_FORWARD_TO_KMSG;
- return 0;
-
- case STDOUT_STREAM_FORWARD_TO_KMSG:
- r = parse_boolean(p);
- if (r < 0) {
- log_warning("Failed to parse copy to kmsg line.");
- return -EINVAL;
- }
-
- s->forward_to_kmsg = !!r;
- s->state = STDOUT_STREAM_FORWARD_TO_CONSOLE;
- return 0;
-
- case STDOUT_STREAM_FORWARD_TO_CONSOLE:
- r = parse_boolean(p);
- if (r < 0) {
- log_warning("Failed to parse copy to console line.");
- return -EINVAL;
- }
-
- s->forward_to_console = !!r;
- s->state = STDOUT_STREAM_RUNNING;
- return 0;
-
- case STDOUT_STREAM_RUNNING:
- return stdout_stream_log(s, p);
- }
-
- assert_not_reached("Unknown stream state");
-}
-
-static int stdout_stream_scan(StdoutStream *s, bool force_flush) {
- char *p;
- size_t remaining;
- int r;
-
- assert(s);
-
- p = s->buffer;
- remaining = s->length;
- for (;;) {
- char *end;
- size_t skip;
-
- end = memchr(p, '\n', remaining);
- if (end)
- skip = end - p + 1;
- else if (remaining >= sizeof(s->buffer) - 1) {
- end = p + sizeof(s->buffer) - 1;
- skip = remaining;
- } else
- break;
-
- *end = 0;
-
- r = stdout_stream_line(s, p);
- if (r < 0)
- return r;
-
- remaining -= skip;
- p += skip;
- }
-
- if (force_flush && remaining > 0) {
- p[remaining] = 0;
- r = stdout_stream_line(s, p);
- if (r < 0)
- return r;
-
- p += remaining;
- remaining = 0;
- }
-
- if (p > s->buffer) {
- memmove(s->buffer, p, remaining);
- s->length = remaining;
- }
-
- return 0;
-}
-
-static int stdout_stream_process(StdoutStream *s) {
- ssize_t l;
- int r;
-
- assert(s);
-
- l = read(s->fd, s->buffer+s->length, sizeof(s->buffer)-1-s->length);
- if (l < 0) {
-
- if (errno == EAGAIN)
- return 0;
-
- log_warning("Failed to read from stream: %m");
- return -errno;
- }
-
- if (l == 0) {
- r = stdout_stream_scan(s, true);
- if (r < 0)
- return r;
-
- return 0;
- }
-
- s->length += l;
- r = stdout_stream_scan(s, false);
- if (r < 0)
- return r;
-
- return 1;
-
-}
-
-static void stdout_stream_free(StdoutStream *s) {
- assert(s);
-
- if (s->server) {
- assert(s->server->n_stdout_streams > 0);
- s->server->n_stdout_streams --;
- LIST_REMOVE(StdoutStream, stdout_stream, s->server->stdout_streams, s);
- }
-
- if (s->fd >= 0) {
- if (s->server)
- epoll_ctl(s->server->epoll_fd, EPOLL_CTL_DEL, s->fd, NULL);
-
- close_nointr_nofail(s->fd);
- }
-
-#ifdef HAVE_SELINUX
- if (s->security_context)
- freecon(s->security_context);
-#endif
-
- free(s->identifier);
- free(s);
-}
-
-static int stdout_stream_new(Server *s) {
- StdoutStream *stream;
- int fd, r;
- socklen_t len;
- struct epoll_event ev;
-
- assert(s);
-
- fd = accept4(s->stdout_fd, NULL, NULL, SOCK_NONBLOCK|SOCK_CLOEXEC);
- if (fd < 0) {
- if (errno == EAGAIN)
- return 0;
-
- log_error("Failed to accept stdout connection: %m");
- return -errno;
- }
-
- if (s->n_stdout_streams >= STDOUT_STREAMS_MAX) {
- log_warning("Too many stdout streams, refusing connection.");
- close_nointr_nofail(fd);
- return 0;
- }
-
- stream = new0(StdoutStream, 1);
- if (!stream) {
- close_nointr_nofail(fd);
- return log_oom();
- }
-
- stream->fd = fd;
-
- len = sizeof(stream->ucred);
- if (getsockopt(fd, SOL_SOCKET, SO_PEERCRED, &stream->ucred, &len) < 0) {
- log_error("Failed to determine peer credentials: %m");
- r = -errno;
- goto fail;
- }
-
-#ifdef HAVE_SELINUX
- if (getpeercon(fd, &stream->security_context) < 0 && errno != ENOPROTOOPT)
- log_error("Failed to determine peer security context: %m");
-#endif
-
- if (shutdown(fd, SHUT_WR) < 0) {
- log_error("Failed to shutdown writing side of socket: %m");
- r = -errno;
- goto fail;
- }
-
- zero(ev);
- ev.data.ptr = stream;
- ev.events = EPOLLIN;
- if (epoll_ctl(s->epoll_fd, EPOLL_CTL_ADD, fd, &ev) < 0) {
- log_error("Failed to add stream to event loop: %m");
- r = -errno;
- goto fail;
- }
-
- stream->server = s;
- LIST_PREPEND(StdoutStream, stdout_stream, s->stdout_streams, stream);
- s->n_stdout_streams ++;
-
- return 0;
-
-fail:
- stdout_stream_free(stream);
- return r;
-}
-
-static bool is_us(const char *pid) {
- pid_t t;
-
- assert(pid);
-
- if (parse_pid(pid, &t) < 0)
- return false;
-
- return t == getpid();
-}
-
-static void dev_kmsg_record(Server *s, char *p, size_t l) {
- struct iovec iovec[N_IOVEC_META_FIELDS + 7 + N_IOVEC_KERNEL_FIELDS];
- char *message = NULL, *syslog_priority = NULL, *syslog_pid = NULL, *syslog_facility = NULL, *syslog_identifier = NULL, *source_time = NULL;
- int priority, r;
- unsigned n = 0, z = 0, j;
- usec_t usec;
- char *identifier = NULL, *pid = NULL, *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)
- driver_message(s, SD_MESSAGE_JOURNAL_MISSED, "Missed %llu kernel messages", (unsigned long long) serial - *s->kernel_seqnum - 1);
-
- /* 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 = parse_usec(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;
- /* Meta data fields attached */
-
- if (*k != ' ')
- break;
-
- k ++, l --;
-
- e = memchr(k, '\n', l);
- if (!e)
- return;
-
- *e = 0;
-
- m = cunescape_length_with_prefix(k, e - k, "_KERNEL_");
- if (!m)
- break;
-
- IOVEC_SET_STRING(iovec[n++], m);
- z++;
-
- l -= (e - k) + 1;
- k = e + 1;
- }
-
- if (asprintf(&source_time, "_SOURCE_MONOTONIC_TIMESTAMP=%llu",
- (unsigned long long) usec) >= 0)
- IOVEC_SET_STRING(iovec[n++], source_time);
-
- IOVEC_SET_STRING(iovec[n++], "_TRANSPORT=kernel");
-
- if (asprintf(&syslog_priority, "PRIORITY=%i", priority & LOG_PRIMASK) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_priority);
-
- if ((priority & LOG_FACMASK) == LOG_KERN)
- IOVEC_SET_STRING(iovec[n++], "SYSLOG_IDENTIFIER=kernel");
- else {
- read_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_SET_STRING(iovec[n++], syslog_identifier);
- }
-
- if (pid) {
- syslog_pid = strappend("SYSLOG_PID=", pid);
- if (syslog_pid)
- IOVEC_SET_STRING(iovec[n++], syslog_pid);
- }
-
- if (asprintf(&syslog_facility, "SYSLOG_FACILITY=%i", LOG_FAC(priority)) >= 0)
- IOVEC_SET_STRING(iovec[n++], syslog_facility);
- }
-
- message = cunescape_length_with_prefix(p, pl, "MESSAGE=");
- if (message)
- IOVEC_SET_STRING(iovec[n++], message);
-
- dispatch_message(s, iovec, n, ELEMENTSOF(iovec), NULL, NULL, NULL, 0, NULL, priority);
-
-finish:
- for (j = 0; j < z; j++)
- free(iovec[j].iov_base);
-
- free(message);
- free(syslog_priority);
- free(syslog_identifier);
- free(syslog_pid);
- free(syslog_facility);
- free(source_time);
- free(identifier);
- free(pid);
-}
-
-static int system_journal_open(Server *s) {
- int r;
- char *fn;
- sd_id128_t machine;
- char ids[33];
-
- r = sd_id128_get_machine(&machine);
- if (r < 0)
- return r;
-
- sd_id128_to_string(machine, ids);
-
- if (!s->system_journal &&
- (s->storage == STORAGE_PERSISTENT || s->storage == STORAGE_AUTO) &&
- access("/run/systemd/journal/flushed", F_OK) >= 0) {
-
- /* If in auto mode: first try to create the machine
- * path, but not the prefix.
- *
- * If in persistent mode: create /var/log/journal and
- * the machine path */
-
- if (s->storage == STORAGE_PERSISTENT)
- (void) mkdir("/var/log/journal/", 0755);
-
- fn = strappend("/var/log/journal/", ids);
- if (!fn)
- return -ENOMEM;
-
- (void) mkdir(fn, 0755);
- free(fn);
-
- fn = strjoin("/var/log/journal/", ids, "/system.journal", NULL);
- if (!fn)
- return -ENOMEM;
-
- r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, s->seal, &s->system_metrics, s->mmap, NULL, &s->system_journal);
- free(fn);
-
- if (r >= 0)
- server_fix_perms(s, s->system_journal, 0);
- else if (r < 0) {
-
- if (r != -ENOENT && r != -EROFS)
- log_warning("Failed to open system journal: %s", strerror(-r));
-
- r = 0;
- }
- }
-
- if (!s->runtime_journal &&
- (s->storage != STORAGE_NONE)) {
-
- fn = strjoin("/run/log/journal/", ids, "/system.journal", NULL);
- if (!fn)
- return -ENOMEM;
-
- if (s->system_journal) {
-
- /* Try to open the runtime journal, but only
- * if it already exists, so that we can flush
- * it into the system journal */
-
- r = journal_file_open(fn, O_RDWR, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal);
- free(fn);
-
- if (r < 0) {
- if (r != -ENOENT)
- log_warning("Failed to open runtime journal: %s", strerror(-r));
-
- r = 0;
- }
-
- } else {
-
- /* OK, we really need the runtime journal, so create
- * it if necessary. */
-
- (void) mkdir_parents(fn, 0755);
- r = journal_file_open_reliably(fn, O_RDWR|O_CREAT, 0640, s->compress, false, &s->runtime_metrics, s->mmap, NULL, &s->runtime_journal);
- free(fn);
-
- if (r < 0) {
- log_error("Failed to open runtime journal: %s", strerror(-r));
- return r;
- }
- }
-
- if (s->runtime_journal)
- server_fix_perms(s, s->runtime_journal, 0);
- }
-
- return r;
-}
-
-static int server_flush_to_var(Server *s) {
- Object *o = NULL;
- int r;
- sd_id128_t machine;
- sd_journal *j;
-
- assert(s);
-
- if (s->storage != STORAGE_AUTO &&
- s->storage != STORAGE_PERSISTENT)
- return 0;
-
- if (!s->runtime_journal)
- return 0;
-
- system_journal_open(s);
-
- if (!s->system_journal)
- return 0;
-
- log_info("Flushing to /var...");
-
- r = sd_id128_get_machine(&machine);
- if (r < 0) {
- log_error("Failed to get machine id: %s", strerror(-r));
- return r;
- }
-
- r = sd_journal_open(&j, SD_JOURNAL_RUNTIME_ONLY);
- if (r < 0) {
- log_error("Failed to read runtime journal: %s", strerror(-r));
- return r;
- }
-
- SD_JOURNAL_FOREACH(j) {
- JournalFile *f;
-
- f = j->current_file;
- assert(f && f->current_offset > 0);
-
- r = journal_file_move_to_object(f, OBJECT_ENTRY, f->current_offset, &o);
- if (r < 0) {
- log_error("Can't read entry: %s", strerror(-r));
- goto finish;
- }
-
- r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
- if (r == -E2BIG) {
- log_info("Allocation limit reached.");
-
- journal_file_post_change(s->system_journal);
- server_rotate(s);
- server_vacuum(s);
-
- r = journal_file_copy_entry(f, s->system_journal, o, f->current_offset, NULL, NULL, NULL);
- }
-
- if (r < 0) {
- log_error("Can't write entry: %s", strerror(-r));
- goto finish;
- }
- }
-
-finish:
- journal_file_post_change(s->system_journal);
-
- journal_file_close(s->runtime_journal);
- s->runtime_journal = NULL;
-
- if (r >= 0)
- rm_rf("/run/log/journal", false, true, false);
-
- return r;
-}
-
-static int server_read_dev_kmsg(Server *s) {
- char buffer[8192+1]; /* the kernel-side limit per record is 8K currently */
- ssize_t l;
-
- assert(s);
- assert(s->dev_kmsg_fd >= 0);
-
- l = read(s->dev_kmsg_fd, buffer, sizeof(buffer) - 1);
- if (l == 0)
- return 0;
- if (l < 0) {
- /* Old kernels who don't allow reading from /dev/kmsg
- * return EINVAL when we try. So handle this cleanly,
- * but don' try to ever read from it again. */
- if (errno == EINVAL) {
- epoll_ctl(s->epoll_fd, EPOLL_CTL_DEL, s->dev_kmsg_fd, NULL);
- return 0;
- }
-
- if (errno == EAGAIN || errno == EINTR)
- return 0;
-
- log_error("Failed to read from kernel: %m");
- return -errno;
- }
-
- dev_kmsg_record(s, buffer, l);
- return 1;
-}
-
-static int server_flush_dev_kmsg(Server *s) {
- int r;
-
- assert(s);
-
- if (s->dev_kmsg_fd < 0)
- return 0;
-
- if (!s->dev_kmsg_readable)
- return 0;
-
- log_info("Flushing /dev/kmsg...");
-
- for (;;) {
- r = server_read_dev_kmsg(s);
- if (r < 0)
- return r;
-
- if (r == 0)
- break;
- }
-
- return 0;
-}
-
-static int process_event(Server *s, struct epoll_event *ev) {
- assert(s);
- assert(ev);
-
- if (ev->data.fd == s->signal_fd) {
- struct signalfd_siginfo sfsi;
- ssize_t n;
-
- if (ev->events != EPOLLIN) {
- log_info("Got invalid event from epoll.");
- return -EIO;
- }
-
- n = read(s->signal_fd, &sfsi, sizeof(sfsi));
- if (n != sizeof(sfsi)) {
-
- if (n >= 0)
- return -EIO;
-
- if (errno == EINTR || errno == EAGAIN)
- return 1;
-
- return -errno;
- }
-
- log_info("Received SIG%s", signal_to_string(sfsi.ssi_signo));
-
- if (sfsi.ssi_signo == SIGUSR1) {
- touch("/run/systemd/journal/flushed");
- server_flush_to_var(s);
- return 1;
- }
-
- if (sfsi.ssi_signo == SIGUSR2) {
- server_rotate(s);
- server_vacuum(s);
- return 1;
- }
-
- return 0;
-
- } else if (ev->data.fd == s->dev_kmsg_fd) {
- int r;
-
- if (ev->events != EPOLLIN) {
- log_info("Got invalid event from epoll.");
- return -EIO;
- }
-
- r = server_read_dev_kmsg(s);
- if (r < 0)
- return r;
-
- return 1;
-
- } else if (ev->data.fd == s->native_fd ||
- ev->data.fd == s->syslog_fd) {
-
- if (ev->events != EPOLLIN) {
- log_info("Got invalid event from epoll.");
- return -EIO;
- }