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Reworked the pidfile class

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Michael 2017-12-09 17:49:11 +00:00
commit 38d5932156
2 changed files with 93 additions and 75 deletions
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146
src/Util/Pidfile.php
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@ -9,78 +9,100 @@ namespace Friendica\Util;
*/
class Pidfile
{
private $file;
private $running;
private $pid;
/**
* @param string $dir path
* @param string $name filename
* @return void
* @brief Read the pid from a given pid file
*
* @param string $file Filename of pid file
*
* @return boolean|string PID or "false" if not existent
*/
public function __construct($dir, $name)
{
$this->file = "$dir/$name";
$this->running = false;
if (file_exists($this->file)) {
$this->pid = trim(@file_get_contents($this->file));
if (($this->pid != "") && posix_kill($this->pid, 0)) {
$this->running = true;
}
static private function pidFromFile($file) {
if (!file_exists($file)) {
return false;
}
if (!$this->running) {
$this->pid = getmypid();
file_put_contents($this->file, $this->pid);
}
return trim(@file_get_contents($file));
}
/**
* @return void
*/
public function __destruct()
{
if (!$this->running && file_exists($this->file)) {
@unlink($this->file);
}
}
/**
* @brief Check if a process with this pid file is already running
* @brief Is there a running process with the given pid file
*
* @param string $file Filename of pid file
*
* @return boolean Is it running?
*/
public function isRunning()
{
return $this->running;
}
static public function isRunningProcess($file) {
$pid = self::pidFromFile($file);
/**
* @brief Return the pid of the process
* @return boolean process id
*/
public function pid()
{
return $this->pid;
}
/**
* @brief Returns the seconds that the old process was running
* @return integer run time of the old process
*/
public function runningTime()
{
return time() - @filectime($this->file);
}
/**
* @brief Kills the old process
* @return boolean
*/
public function kill()
{
if (!empty($this->pid)) {
return posix_kill($this->pid, SIGTERM);
if (!$pid) {
return false;
}
// Is the process running?
$running = posix_kill($pid, 0);
// If not, then we will kill the stale file
if (!$running) {
self::delete($file);
}
return $running;
}
/**
* @brief Kills a process from a given pid file
*
* @param string $file Filename of pid file
*
* @return boolean Was it killed successfully?
*/
static public function killProcess($file) {
$pid = self::pidFromFile($file);
// We don't have a process id? then we quit
if (!$pid) {
return false;
}
// We now kill the process
$killed = posix_kill($pid, SIGTERM);
// If we killed the process successfully, we can remove the pidfile
if ($killed) {
self::delete($file);
}
return $killed;
}
/**
* @brief Creates a pid file
*
* @param string $file Filename of pid file
*
* @return boolean|string PID or "false" if not created
*/
static public function create($file) {
$pid = self::pidFromFile($file);
// We have a process id? then we quit
if ($pid) {
return false;
}
$pid = getmypid();
file_put_contents($file, $pid);
// Now we check if everything is okay
return self::pidFromFile($file);
}
/**
* @brief Deletes a given pid file
*
* @param string $file Filename of pid file
*
* @return boolean Is it running?
*/
static public function delete($file) {
return @unlink($file);
}
}