Re: [9fans] process group, processes running in the background

[Pietro Gagliardi <pietro10@mac.com>]

On Jun 20, 2008, at 10:03 AM, Rudolf Sykora wrote:

> Hello,
>
> is there any simple way how to identify processes belonging to one
> concrete process group?

They're called "note groups" and the noteid file of each process has
the number. So if you call 6 lines of rc and 5 lines of awk simple,
then yes!

{
	for(i in /proc/*)
		if(! ~ $i /proc/trace)
			echo `{cat $i/noteid}:`{basename $i}
} | sort -t: -n | awk '
# based on squash by jon bentley from programming pearls 1st edition
BEGIN { FS = ":" }
$1 != prev { prev = $1; if(NR > 1) printf "\n"; printf "%d: ", $1 }
{ printf "%d ", $2 }
END { printf "\n" }
'

> Is there anything like pstree in plan9?
Work with the code I gave you and /sys/src/cmd/ps.c.

Pietro