/bin/sh -c CMD will fork sh and then exec CMD.
/bin/sh -c exec CMD will NOT fork and only executes CMD.
Therefore, you can get rid of this hack by prefixing your command to "exec bla bla bla".
proc_terminate
(PHP 5, PHP 7, PHP 8)
proc_terminate — Mata un proceso abierto mediante proc_open
Descripción
Señala un process (creado usando
proc_open()) que debe terminar.
proc_terminate() regresa inmediatamente y espera a la terminación del proceso.
proc_terminate() Permite terminar el proceso y continuar con otras tareas. Puede consultar el estado del proceso (para ver si se ha detenido) usando la función proc_get_status().
Parámetros
-
process -
El recurso de proc_open() que será cerrado.
-
signal -
Este parámetro opcional solo es útil en sistemas operativos POSIX; puede especificar una señal para enviar al proceso utilizando la llamada al sistema
kill(2). Por defecto esSIGTERM.
Valores devueltos
Devuelve el estado de terminación del proceso que se ejecutó.
Ver también
- proc_open() - Ejecuta un comando y abre un puntero de fichero para entrada/salida
- proc_close() - Cierra un proceso abierto mediante proc_open y devuelve el códido de salida de tal proceso
- proc_get_status() - Obtiene información sobre un proceso abierto por proc_open
add a note
User Contributed Notes 4 notes
csh dot spam at me dot com ¶
11 years ago
jerhee at ucsd dot edu ¶
16 years ago
As explained in http://bugs.php.net/bug.php?id=39992, proc_terminate() leaves children of the child process running. In my application, these children often have infinite loops, so I need a sure way to kill processes created with proc_open(). When I call proc_terminate(), the /bin/sh process is killed, but the child with the infinite loop is left running.
Until proc_terminate() gets fixed, I would not recommend using it. Instead, my solution is to:
1) call proc_get_status() to get the parent pid (ppid) of the process I want to kill.
2) use ps to get all pids that have that ppid as their parent pid
3) use posix_kill() to send the SIGKILL (9) signal to each of those child pids
4) call proc_close() on process resource
<?php
$descriptorspec = array(
0 => array('pipe', 'r'), // stdin is a pipe that the child will read from
1 => array('pipe', 'w'), // stdout is a pipe that the child will write to
2 => array('pipe', 'w') // stderr is a pipe the child will write to
);
$process = proc_open('bad_program', $descriptorspec, $pipes);
if(!is_resource($process)) {
throw new Exception('bad_program could not be started.');
}
//pass some input to the program
fwrite($pipes[0], $lots_of_data);
//close stdin. By closing stdin, the program should exit
//after it finishes processing the input
fclose($pipes[0]);
//do some other stuff ... the process will probably still be running
//if we check on it right away
$status = proc_get_status($process);
if($status['running'] == true) { //process ran too long, kill it
//close all pipes that are still open
fclose($pipes[1]); //stdout
fclose($pipes[2]); //stderr
//get the parent pid of the process we want to kill
$ppid = $status['pid'];
//use ps to get all the children of this process, and kill them
$pids = preg_split('/\s+/', `ps -o pid --no-heading --ppid $ppid`);
foreach($pids as $pid) {
if(is_numeric($pid)) {
echo "Killing $pid\n";
posix_kill($pid, 9); //9 is the SIGKILL signal
}
}
proc_close($process);
}
?>
v dot denegin at yahoo dot com ¶
10 years ago
on Windows platform proc_terminate() does not kill sub-processes that are not handling kill signals. It happens even if you call xxx.exe and call proc_terminate() the process will remain active.
The solution is instead of calling proc_terminate() is to call the user-defined kill() function (already win/unix optimized)
After that need to close all pipes and execute proc_close().
function kill($pid){
return stripos(php_uname('s'), 'win')>-1 ? exec("taskkill /F /T /PID $pid") : exec("kill -9 $pid");
}
function killall($pids) {
$os=stripos(php_uname('s'), 'win')>-1;
($_=implode($os?' /PID ':' ',$pids)) or ($_=$pids);
return preg_match('/success|close/', $os ? exec("taskkill /F /T /PID $_") : exec("kill -9 $_"));
}
Example:
$pstatus = proc_get_status($resource);
$PID = $pstatus['pid'];
// other commands
kill($PID); // instead of proc_terminate($resource);
fclose($pipes[0]);
fclose($pipes[1]);
fclose($pipes[2]);
proc_close($resource);
smcbride at msn dot com ¶
3 years ago
Just a small note so people don't have to look elsewhere
To get the list of processes or find a process by name, use
$proclist = shell_exec('ps -elF') for linux
$proclist = shell_exec('tasklist') for windows
After that, you can use php normal parsing functions to get the pid
