/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)
proc_terminate — Kills a process opened by proc_open
설명
bool proc_terminate
( resource
$process
[, int $signal = 15
] )
Signals a process (created using
proc_open()) that it should terminate.
proc_terminate() returns immediately and does not wait
for the process to terminate.
proc_terminate() allows you terminate the process and continue with other tasks. You may poll the process (to see if it has stopped yet) by using the proc_get_status() function.
인수
-
process -
The proc_open() resource that will be closed.
-
signal -
This optional parameter is only useful on POSIX operating systems; you may specify a signal to send to the process using the kill(2) system call. The default is SIGTERM.
반환값
Returns the termination status of the process that was run.
변경점
| 버전 | 설명 |
|---|---|
| 5.2.2 |
Previous versions used to destroy the given process
resource.
|
참고
- proc_open() - Execute a command and open file pointers for input/output
- proc_close() - Close a process opened by proc_open and return the exit code of that process
- proc_get_status() - Get information about a process opened by 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
