log` pair
// tried to do. The earlier echo was buggy (the `>` redirect was
// run as www-data, not under sudo, so it could only ever truncate
// a www-data-writable file — a silent no-op when the log was last
// touched as root). Run synchronously, BEFORE the backgrounded
// pistar-update spawn, so the script's first writes always land
// in a freshly cleared file regardless of `&` scheduling.
system('sudo truncate -s 0 /var/log/pi-star/pi-star_update.log');
system('sudo /usr/local/sbin/pistar-update > /dev/null 2>&1 &');
}
// Sanity Check Passed.
header('Cache-Control: no-cache');
// session_start() is no longer called here — csrf_verify() at
// the top of the file already started the session via
// csrf_session_start(). A second session_start() would emit a
// "session is already active" NOTICE on PHP 8.x. The existing
// $_SESSION['update_offset'] log-tail logic below works
// unchanged against the already-active session.
// Initialize session offset only if update has been confirmed
if (!isset($_GET['ajax']) && !empty($_POST) && isset($_POST['confirm_update'])) {
//unset($_SESSION['update_offset']);
if (file_exists('/var/log/pi-star/pi-star_update.log')) {
$_SESSION['update_offset'] = filesize('/var/log/pi-star/pi-star_update.log');
} else {
$_SESSION['update_offset'] = 0;
}
}
if (isset($_GET['ajax'])) {
//session_start();
if (!file_exists('/var/log/pi-star/pi-star_update.log')) {
exit();
}
$handle = fopen('/var/log/pi-star/pi-star_update.log', 'rb');
if (isset($_SESSION['update_offset'])) {
fseek($handle, 0, SEEK_END);
if ($_SESSION['update_offset'] > ftell($handle)) //log rotated/truncated
$_SESSION['update_offset'] = 0; //continue at beginning of the new log
$data = stream_get_contents($handle, -1, $_SESSION['update_offset']);
$_SESSION['update_offset'] += strlen($data);
echo nl2br($data);
}
else {
fseek($handle, 0, SEEK_END);
$_SESSION['update_offset'] = ftell($handle);
}
exit();
}
?>
Pi-Star - <?php echo $lang['digital_voice']." ".$lang['dashboard']." - ".$lang['update'];?>