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;
}
