[BusyBox] lsof applet

[Mark Senior]

Hello

I'm writing a simple lsof applet for busybox.  It's largely based on 
Tony J. White's fuser applet, but a completely separate implementation.

I realize it's waaay too late to be in 1.00, and anyway it's a little 
ways short of completion even now.  The big thing missing (from my 
point of view anyway) is the ability to nicely present socket info - to 
put procfs's "socket:[9999]" as something like 
"10.0.0.1:1234->10.0.0.2:22".

The logic for parsing /proc/net/(unix,tcp[6],udp[6],raw[6]) entries 
into struct sockaddr_in's and such is already in netstat.c.  Seems a 
waste to be putting largely identical functionality in two different 
places.

Might it be reasonable to put that into libbb?  I guess the downside 
would be that someone who wanted neither netstat nor lsof would still 
be building those functions into libbb (or am I missing something?)  
Anyway, any thoughts would be appreciated.

Oh, incidentally, lsof.o comes in at just over a kilobyte right now 
without the network entry translation.  Could probably be shaved down 
somewhat with a little tweaking.

Thanks
Mark