static int journal_get_events (lua_State *L) {
sd_journal *j = check_journal(L, 1);
int err = sd_journal_get_events(j);
if (err < 0) return handle_error(L, -err);
lua_pushinteger(L, err);
return 1;
}
int open_journal_for_upload(Uploader *u,
sd_journal *j,
const char *cursor,
bool after_cursor,
bool follow) {
int fd, r, events;
u->journal = j;
sd_journal_set_data_threshold(j, 0);
if (follow) {
fd = sd_journal_get_fd(j);
if (fd < 0)
return log_error_errno(fd, "sd_journal_get_fd failed: %m");
events = sd_journal_get_events(j);
r = sd_journal_reliable_fd(j);
assert(r >= 0);
if (r > 0)
u->timeout = -1;
else
u->timeout = JOURNAL_UPLOAD_POLL_TIMEOUT;
r = sd_event_add_io(u->events, &u->input_event,
fd, events, dispatch_journal_input, u);
if (r < 0)
return log_error_errno(r, "Failed to register input event: %m");
log_debug("Listening for journal events on fd:%d, timeout %d",
fd, u->timeout == (uint64_t) -1 ? -1 : (int) u->timeout);
} else
log_debug("Not listening for journal events.");
if (cursor) {
r = sd_journal_seek_cursor(j, cursor);
if (r < 0) {
return log_error_errno(r, "Failed to seek to cursor %s: %m",
cursor);
}
}
return process_journal_input(u, 1 + !!after_cursor);
}