static size_t journal_input_callback(void *buf, size_t size, size_t nmemb, void *userp) {
Uploader *u = userp;
int r;
sd_journal *j;
size_t filled = 0;
ssize_t w;
assert(u);
assert(nmemb <= SSIZE_MAX / size);
check_update_watchdog(u);
j = u->journal;
while (j && filled < size * nmemb) {
if (u->entry_state == ENTRY_DONE) {
r = sd_journal_next(j);
if (r < 0) {
log_error_errno(r, "Failed to move to next entry in journal: %m");
return CURL_READFUNC_ABORT;
} else if (r == 0) {
if (u->input_event)
log_debug("No more entries, waiting for journal.");
else {
log_info("No more entries, closing journal.");
close_journal_input(u);
}
u->uploading = false;
break;
}
u->entry_state = ENTRY_CURSOR;
}
w = write_entry((char*)buf + filled, size * nmemb - filled, u);
if (w < 0)
return CURL_READFUNC_ABORT;
filled += w;
if (filled == 0) {
log_error("Buffer space is too small to write entry.");
return CURL_READFUNC_ABORT;
} else if (u->entry_state != ENTRY_DONE)
/* This means that all available space was used up */
break;
log_debug("Entry %zu (%s) has been uploaded.",
u->entries_sent, u->current_cursor);
}
return filled;
}
int check_journal_input(Uploader *u) {
if (u->input_event) {
int r;
r = sd_journal_process(u->journal);
if (r < 0) {
log_error_errno(r, "Failed to process journal: %m");
close_journal_input(u);
return r;
}
if (r == SD_JOURNAL_NOP)
return 0;
}
return process_journal_input(u, 1);
}
