friendica-github/src/Model/Process.php

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<?php
/**
* @file src/Model/Process.php
*/
namespace Friendica\Model;
use Friendica\BaseObject;
use Friendica\Util\Temporal;
use dba;
require_once 'include/dba.php';
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require_once 'include/datetime.php';
/**
* @brief functions for interacting with a process
*/
class Process extends BaseObject
{
/**
* Insert a new process row. If the pid parameter is omitted, we use the current pid
*
* @param string $command
* @param string $pid
* @return bool
*/
public static function insert($command, $pid = null)
{
$return = true;
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if (is_null($pid)) {
$pid = getmypid();
}
dba::transaction();
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if (!dba::exists('process', ['pid' => $pid])) {
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$return = dba::insert('process', ['pid' => $pid, 'command' => $command, 'created' => Temporal::utcNow()]);
}
dba::commit();
return $return;
}
/**
* Remove a process row by pid. If the pid parameter is omitted, we use the current pid
*
* @param string $pid
* @return bool
*/
public static function deleteByPid($pid = null)
{
if ($pid === null) {
$pid = getmypid();
}
return dba::delete('process', ['pid' => $pid]);
}
/**
* Clean the process table of inactive physical processes
*/
public static function deleteInactive()
{
dba::transaction();
$processes = dba::select('process', ['pid']);
while($process = dba::fetch($processes)) {
if (!posix_kill($process['pid'], 0)) {
self::deleteByPid($process['pid']);
}
}
dba::commit();
}
}