Background: I am writing a subroutine which will be given a bunch of process descriptions like "cmdline=/usr/bin/apache" or "cmdline=/usr/bin/emacs /etc/passwd" or "rss>123456". (Probably packaged in a hash).

It should use Proc::ProcessTable to look at each process in turn, and return all the data it has on the processes that match each description.

The problem is, Proc:ProcessTable returns an object, where every property of a process is an accessor method for that object.

Obviously, I can't do $p->$key==$val, much as that would come in handy right now.

I think that I need to either do something ugly with eval, or create a chain of ifs like if ($key eq 'cmdline') {$match=$p->cmdline} elsif ($key eq... etc.

The matter is made more complicated because I have to return data about the process in a hash - I'm not allowed to just return a Proc::ProcessTable::Process object. That means that even if I use a series of ifs in the matching part, I still need a solution for the reporting part.

I was thinking of dispensing with Proc::ProcessTable altogether and just parsing the output of ps, but this code needs to run as transparently as possible on at least Linux and Solaris...

In reply to $var as accessor name? by matija

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