kenv enhancement

[John Baldwin]

On Saturday 01 May 2004 08:22 am, Danny Braniss wrote:
> Hi,
> 	I propose to bring back some lost options to kenv, -c and -s
> ie,
> 	kenv -c class [-s]
> so that
> 	kenv -h is equivalent to kenv -c hint.
> and
> 	kenv -c boot.nfsroot. -s
> gives:
> nfshandle="X9ca48b3f5b77454e0c00000002000000bfa3063100000000000000000000000
>0X" path="/d/6"
> server="132.65.16.100"
>
> the 'enhanced' kenv is in
> 	ftp://ftp.cs.huji.ac.il/users/danny/freebsd/kenv/
>
> danny

I rototilled this a bit to make it use the existing style.  I also renamed 
'class' to prefix since you can do things like 'kenv -p kern -s' to get 
interesting output like:

el="kernel"
el_options=""
elname="/boot/kernel/kernel"

:-P

One thing to note is that 'kenv -p foo' is basically the same as
'kenv | grep ^foo', and that 'kenv -p foo -s' is basically the same as
'kenv | sed -ne '/^foo/{s///;p;}'.  Generally new options aren't added to 
programs if they can be easily duplicated via a simple pipeline.  Is there a 
reason that you need kenv to do this explicitly rather than using sed or 
grep?

-- 
John Baldwin <jhb at FreeBSD.org>  <><  http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve"  =  http://www.FreeBSD.org