How to get the PID when a process is started by "system"? 1

[julianLiuRsch]

If a process is started by ``system'', e.g
---
system "konsole --geometry 650x650+100+0 --workdir /home/julian &";
===
How do we get the PID of this process?

thanks in advance.

 

[PinkeyNBrain]

If I remember - the '&' will spit out a pid when it starts. Maybe the following will work:

   $os_cmd = "$your_command &";
   open(FH, "$os_cmd |");
   $pid = <FH> ;
   close(FH);

Since the command was started in background mode, the close(FH) should have no effect on it.

 

[PinkeyNBrain]

Sorry - false alarm.
Just tried:
<command> & >pid_file
and
<command> & 2>pid_file

Neither dumped the pid to the file so I doubt my previous post will work.

 

[sycoogtit]

I've never done it before, but check out this post. There are a lot of suggestions -- I'm sure one of them will work for you.

http://www.perlmonks.org/?node_id=680907

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