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Code Issues Releases Wiki Activity

Refactor working with a locked file

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This commit is contained in:
Peter Knut
2024-10-07 22:20:32 +02:00
parent a494827dc5
commit a63fadd503
3 changed files with 40 additions and 31 deletions
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8
adminer/include/auth.inc.php
View File

@@ -82,11 +82,11 @@ function build_http_url($server, $username, $password, $defaultServer, $defaultP
function add_invalid_login() { function add_invalid_login() {
global $adminer; global $adminer;
$fp = file_open_lock(get_temp_dir() . "/adminer.invalid"); $file = open_file_with_lock(get_temp_dir() . "/adminer.invalid");
if (!$fp) { if (!$file) {
return; return;
} }
$invalids = unserialize(stream_get_contents($fp)); $invalids = unserialize(stream_get_contents($file));
$time = time(); $time = time();
if ($invalids) { if ($invalids) {
foreach ($invalids as $ip => $val) { foreach ($invalids as $ip => $val) {
@@ -100,7 +100,7 @@ function add_invalid_login() {
$invalid = array($time + 30*60, 0); // active for 30 minutes $invalid = array($time + 30*60, 0); // active for 30 minutes
} }
$invalid[1]++; $invalid[1]++;
file_write_unlock($fp, serialize($invalids)); write_and_unlock_file($file, serialize($invalids));
} }
function check_invalid_login() { function check_invalid_login() {

6
adminer/include/bootstrap.inc.php
View File

@@ -32,9 +32,9 @@ if (isset($_GET["file"])) {
} }
if ($_GET["script"] == "version") { if ($_GET["script"] == "version") {
$fp = file_open_lock(get_temp_dir() . "/adminer.version"); $file = open_file_with_lock(get_temp_dir() . "/adminer.version");
if ($fp) { if ($file) {
file_write_unlock($fp, serialize(array("signature" => $_POST["signature"], "version" => $_POST["version"]))); write_and_unlock_file($file, serialize(["signature" => $_POST["signature"], "version" => $_POST["version"]]));
} }
exit; exit;
} }

57
adminer/include/functions.inc.php
View File

@@ -1215,33 +1215,42 @@ function get_temp_dir() {
return $return; return $return;
} }
/** Open and exclusively lock a file /**
* @param string * Opens and exclusively lock a file.
* @return resource or null for error *
*/ * @param string $filename
function file_open_lock($filename) { * @return resource|null
$fp = @fopen($filename, "r+"); // @ - may not exist */
if (!$fp) { // c+ is available since PHP 5.2.6 function open_file_with_lock($filename)
$fp = @fopen($filename, "w"); // @ - may not be writable {
if (!$fp) { $file = fopen($filename, "c+");
return; if (!$file) {
} return null;
chmod($filename, 0660);
} }
flock($fp, LOCK_EX);
return $fp; chmod($filename, 0660);
if (!flock($file, LOCK_EX)) {
fclose($file);
return null;
}
return $file;
} }
/** Write and unlock a file /**
* @param resource * Writes and unlocks a file.
* @param string *
*/ * @param resource $file
function file_write_unlock($fp, $data) { * @param string $data
rewind($fp); */
fwrite($fp, $data); function write_and_unlock_file($file, $data)
ftruncate($fp, strlen($data)); {
flock($fp, LOCK_UN); rewind($file);
fclose($fp); fwrite($file, $data);
ftruncate($file, strlen($data));
flock($file, LOCK_UN);
fclose($file);
} }
/** /**