Date: Mon, 3 May 2004 14:59:36 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-current@FreeBSD.org Subject: Re: kenv enhancement Message-ID: <200405031459.36127.jhb@FreeBSD.org> In-Reply-To: <20040501122238.63D2A43D41@mx1.FreeBSD.org> References: <20040501122238.63D2A43D41@mx1.FreeBSD.org>
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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@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.org
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