mirror of https://github.com/friendica/friendica
Reworked the pidfile class
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0f149a691e
commit
38d5932156
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@ -46,7 +46,6 @@ class ExAuth
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{
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private $bDebug;
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private $host;
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private $pidfile;
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/**
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* @brief Create the class
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@ -313,21 +312,18 @@ class ExAuth
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return;
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}
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$this->pidfile = new Pidfile($lockpath, $host);
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if ($this->pidfile->isRunning()) {
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$oldpid = $this->pidfile->pid();
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$this->writeLog(LOG_INFO, 'Process ' . $oldpid . ' was running for ' . $this->pidfile->runningTime() . ' seconds and will now be killed');
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$this->pidfile->kill();
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// Wait until the other process is hopefully killed
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sleep(2);
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$this->pidfile = new Pidfile($lockpath, $host);
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if ($oldpid == $this->pidfile->pid()) {
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$this->writeLog(LOG_ERR, 'Process ' . $oldpid . "wasn't killed in time. We now quit our process.");
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$file = $lockpath . DIRECTORY_SEPARATOR . $host;
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if (Pidfile::isRunningProcess($file)) {
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if (PidFile::killProcess($file)) {
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$this->writeLog(LOG_INFO, 'Old process was successfully killed');
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} else {
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$this->writeLog(LOG_ERR, "The old Process wasn't killed in time. We now quit our process.");
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die();
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}
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}
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// Now it is safe to create the pid file
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Pidfile::create($file);
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}
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/**
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@ -9,78 +9,100 @@ namespace Friendica\Util;
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*/
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class Pidfile
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{
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private $file;
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private $running;
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private $pid;
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/**
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* @param string $dir path
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* @param string $name filename
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* @return void
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* @brief Read the pid from a given pid file
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*
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* @param string $file Filename of pid file
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*
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* @return boolean|string PID or "false" if not existent
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*/
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public function __construct($dir, $name)
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{
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$this->file = "$dir/$name";
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$this->running = false;
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if (file_exists($this->file)) {
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$this->pid = trim(@file_get_contents($this->file));
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if (($this->pid != "") && posix_kill($this->pid, 0)) {
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$this->running = true;
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}
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static private function pidFromFile($file) {
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if (!file_exists($file)) {
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return false;
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}
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if (!$this->running) {
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$this->pid = getmypid();
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file_put_contents($this->file, $this->pid);
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}
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return trim(@file_get_contents($file));
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}
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/**
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* @return void
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*/
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public function __destruct()
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{
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if (!$this->running && file_exists($this->file)) {
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@unlink($this->file);
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}
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}
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/**
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* @brief Check if a process with this pid file is already running
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* @brief Is there a running process with the given pid file
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*
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* @param string $file Filename of pid file
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*
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* @return boolean Is it running?
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*/
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public function isRunning()
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{
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return $this->running;
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}
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static public function isRunningProcess($file) {
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$pid = self::pidFromFile($file);
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/**
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* @brief Return the pid of the process
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* @return boolean process id
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*/
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public function pid()
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{
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return $this->pid;
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}
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/**
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* @brief Returns the seconds that the old process was running
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* @return integer run time of the old process
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*/
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public function runningTime()
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{
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return time() - @filectime($this->file);
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}
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/**
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* @brief Kills the old process
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* @return boolean
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*/
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public function kill()
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{
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if (!empty($this->pid)) {
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return posix_kill($this->pid, SIGTERM);
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if (!$pid) {
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return false;
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}
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// Is the process running?
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$running = posix_kill($pid, 0);
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// If not, then we will kill the stale file
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if (!$running) {
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self::delete($file);
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}
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return $running;
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}
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/**
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* @brief Kills a process from a given pid file
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*
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* @param string $file Filename of pid file
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*
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* @return boolean Was it killed successfully?
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*/
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static public function killProcess($file) {
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$pid = self::pidFromFile($file);
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// We don't have a process id? then we quit
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if (!$pid) {
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return false;
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}
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// We now kill the process
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$killed = posix_kill($pid, SIGTERM);
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// If we killed the process successfully, we can remove the pidfile
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if ($killed) {
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self::delete($file);
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}
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return $killed;
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}
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/**
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* @brief Creates a pid file
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*
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* @param string $file Filename of pid file
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*
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* @return boolean|string PID or "false" if not created
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*/
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static public function create($file) {
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$pid = self::pidFromFile($file);
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// We have a process id? then we quit
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if ($pid) {
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return false;
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}
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$pid = getmypid();
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file_put_contents($file, $pid);
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// Now we check if everything is okay
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return self::pidFromFile($file);
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}
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/**
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* @brief Deletes a given pid file
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*
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* @param string $file Filename of pid file
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*
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* @return boolean Is it running?
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*/
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static public function delete($file) {
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return @unlink($file);
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}
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}
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