php exec() get PID

[Judahnator]

Super simple question.

 

I am running a java program with the PHP "exec()" command, that needs manually killed at a given time. Normally, i would issue the "pkill java" command, but that would kill all instances where i only need the specific one i called earlier killed.

 

I cant seem to find online where to get the PID, anyone know anything?

[RaidenLeeChin]

As far as i know you need to do an import of a package to get process ids, most are work arounds. So much easier in C

 

http://maxrohde.com/2012/12/13/java-get-process-id-three-approaches/

 

http://www.wikihow.com/Get-Pid-in-Java

 

 

http://boxysystems.com/index.php/java-tip-find-process-id-of-running-java-process/

 

http://www.golesny.de/p/code/javagetpid

 

http://stackoverflow.com/questions/35842/how-can-a-java-program-get-its-own-process-id

[mikebald]

If this is a linux based machine you can use the class made by dell_petter at hotmail dot com found at http://php.net/manual/en/function.exec.php:

<?php    // You may use status(), start(), and stop(). notice that start() method gets called automatically one time.    $process = new Process('ls -al');    // or if you got the pid, however here only the status() metod will work.    $process = new Process();    $process.setPid(my_pid);    // Then you can start/stop/ check status of the job.    $process.stop();    $process.start();    if ($process.status()){        echo "The process is currently running";    }else{        echo "The process is not running.";    }?><?php/* An easy way to keep in track of external processes.* Ever wanted to execute a process in php, but you still wanted to have somewhat controll of the process ? Well.. This is a way of doing it.* @compability: Linux only. (Windows does not work).* @author: Peec*/class Process{    private $pid;    private $command;    public function __construct($cl=false){        if ($cl != false){            $this->command = $cl;            $this->runCom();        }    }    private function runCom(){        $command = 'nohup '.$this->command.' > /dev/null 2>&1 & echo $!';        exec($command ,$op);        $this->pid = (int)$op[0];    }    public function setPid($pid){        $this->pid = $pid;    }    public function getPid(){        return $this->pid;    }    public function status(){        $command = 'ps -p '.$this->pid;        exec($command,$op);        if (!isset($op[1]))return false;        else return true;    }    public function start(){        if ($this->command != '')$this->runCom();        else return true;    }    public function stop(){        $command = 'kill '.$this->pid;        exec($command);        if ($this->status() == false)return true;        else return false;    }}?>

If you're not on linux, I would look into proc_open.

[Judahnator]

This is awesome, ill look into it.

 

Thanks

If this is a linux based machine you can use the class made by dell_petter at hotmail dot com found at http://php.net/manual/en/function.exec.php:

<?php    // You may use status(), start(), and stop(). notice that start() method gets called automatically one time.    $process = new Process('ls -al');    // or if you got the pid, however here only the status() metod will work.    $process = new Process();    $process.setPid(my_pid);    // Then you can start/stop/ check status of the job.    $process.stop();    $process.start();    if ($process.status()){        echo "The process is currently running";    }else{        echo "The process is not running.";    }?><?php/* An easy way to keep in track of external processes.* Ever wanted to execute a process in php, but you still wanted to have somewhat controll of the process ? Well.. This is a way of doing it.* @compability: Linux only. (Windows does not work).* @author: Peec*/class Process{    private $pid;    private $command;    public function __construct($cl=false){        if ($cl != false){            $this->command = $cl;            $this->runCom();        }    }    private function runCom(){        $command = 'nohup '.$this->command.' > /dev/null 2>&1 & echo $!';        exec($command ,$op);        $this->pid = (int)$op[0];    }    public function setPid($pid){        $this->pid = $pid;    }    public function getPid(){        return $this->pid;    }    public function status(){        $command = 'ps -p '.$this->pid;        exec($command,$op);        if (!isset($op[1]))return false;        else return true;    }    public function start(){        if ($this->command != '')$this->runCom();        else return true;    }    public function stop(){        $command = 'kill '.$this->pid;        exec($command);        if ($this->status() == false)return true;        else return false;    }}?>

If you're not on linux, I would look into proc_open.