Re: [Sheflug] Little script help

[Alastair Donlon <nospam [at] netsoc.ucd.ie>]

I think that you have to iterate through each numbered directory
in /proc and parse /proc/<pid>/cmdline. I'm not 100% sure of its
syntax though. At first glance, it doesn't seem to like putting
blankspace between the command name and its commandline arguments.
I'm sure there's probably some non-printable character in there,
probably '\0' ;) 

I don't think that the kernel gives you an interface to a nicely
formatted list of the processes.

A.D.

On Mon, Nov 27, 2000 at 03:26:07PM +0000, José Luis Gómez Dans wrote:
> Hi Alastair,
> 
> On Mon, Nov 27, 2000 at 03:07:41PM +0000, Alastair Donlon wrote:
> 
> > A really dirty command line would look like:
> > 
> > ps -A e | grep 'cat /tmp/' | awk 'print $6' | sed -e 's/\/tmp\///'
> > 
> 
> 	That's what I had thought of, but in this case,  ps _is_ a
> script itself, that runs on mawk (mulinux's very own awk
> implementation). Bearing this in mind, the machine this script needs to
> run on takes something like 45-50 seconds to list all current processes
> (no joke), plus the grep, sed and friends, the count rises and rises and
> rises... That's why I had this idea of using a little script in
> /proc/somewhere directly to cut the out middle man. The thing is that I
> can't quite remember where the list of processes resides (if at all, I
> know that a list of all processes exists at /proc/process_id), and I
> wasn't too sure of its syntax (and of the syntax needed to sed/awk it).
> 
> 	Thanks,
> 	José
> -- 
> José L Gómez Dans			PhD student
> Tel: +44 114 222 5582			Radar & Communications Group
> FAX; +44 870 132 2990			Department of Electronic Engineering
> 					University of Sheffield UK
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