On Mon, May 25, 2020 at 8:09 PM Shivanand Sharma <shivanand@xxxxxxxxxxxxxx> wrote:
So the script is a part of a web application / plugin which is basically a malware scanner.Webserver owners install this app and schedule it to run on a periodic basis.This means that it could be a LAMP or LEMP or other kind of stack with cgi or mod_php etc.Hang / Freeze: The issue is that some regexes / payloads or a combination thereof makes the script exceed max_execution_time. This is not desirable or even expected.In this case it's acceptable for the script to hit max_execution_time and the app will just schedule the next batch.However with the bug in question, the script exceeds max_execution_time and PHP has no way to recover.One way was to have a url-endpoint where we could post a request via curl and if that fails or times-out the script can still continue. But I was interested in exploring if PHP itself can recover from such a situation without having to rely on an external process.Regards,
Shivanand Sharma
Hi Shivanand,
But external tools might be very simple and I think it would help here if you run it as a separate process.
You can check https://www.man7.org/linux/man-pages/man1/timeout.1.html that it's easy to use.
Or you can implement a simple process runner with symfony/process from php that would include your custom timeout logic, based in output of that script maybe.
Regards,
Alex
