Date: Tue, 05 Aug 1997 11:37:03 -0600 From: Warner Losh <imp@rover.village.org> To: VaX#n8 <vax@linkdead.paranoia.com> Cc: netbsd-users@netbsd.org, freebsd-current@freebsd.org, misc@openbsd.org, mail2news@news.news.demon.net Subject: Re: configuration file tricks of the masters Message-ID: <E0wvnXb-000326-00@rover.village.org> In-Reply-To: Your message of "Sun, 03 Aug 1997 00:28:08 CDT." <199708030528.AAA24396@linkdead.paranoia.com> References: <199708030528.AAA24396@linkdead.paranoia.com>
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In message <199708030528.AAA24396@linkdead.paranoia.com> VaX#n8 writes:
: I am interested in:
: o clever hacks
: o generating multiple customized copies from one master
: o mixing automatically-generated and user-generated data
: o portable shell coding techniques
:
: Comments and submissions welcome.
I'm not sure if this is the right forum to reply, but here are a
couple of the ones that I use.
I have a list of dirs that I want for my path. I don't want all of
them in my path for a variety of reasons. So I use the following csh
code to deal. It also shows how to have inline functions in tcsh.
Kinda gross, but it does seem to do the job.
set host=`uname -n`
set __uname_s=`uname -s`
set __uname_r=`uname -r`
set os=`echo "$__uname_s-$__uname_r" | sed -e 's/\..*$//'`
# This shows how to use aliases as inline functions in csh This really
# should be expanded inline in the following code, but I'm leaving it
# here so that I can know how to do this in the future. __maybe_add
# takes two parameters: The env var to update, and the directory to
# prepend if it isn't already in the path list. This is the closest
# csh comes to functions...
alias __maybe_add 'if ((:${\!:1}: !~ *:\!:2\:*) && -d \!:2) set \!:1=${\!:1}\:\!:2'
# OK, let's try to be nice to the network and only do the rehashing
# stuff once. Seems to be a tiny bit faster, but not by much in the
# default case, and just as slow otherwise. We'll see if this is any
# better than alternatives or not. It would appear that much of the
# slowness is due to other factors (mostly the .subscriptions file that
# is a little silly about some things).
#
# Also make sure that /usr/ucb is toward the front of the list.
#
set __P=/usr/ucb:`echo $PATH | sed 's=/usr/ucb==;s/::/:/;s/^://;s/:$//'`
foreach i (~/bin ~/bin/$host ~/bin/$os \
~imp/bin ~imp/bin/$host ~imp/bin/$os \
/usr/etc /usr/local/bin /usr/local/mh/bin \
/usr/local/bin/mh /usr/bin/X11 /usr/X11R6/bin \
/opt/SUNWspro/bin \
/usr/openwin/bin /usr/local/bin/X11 /usr/local/X11R6/bin \
/usr/ucb /usr/bin /bin /usr/sbin /sbin \
/usr/local/sbin /usr/ccs/bin .)
__maybe_add __P $i
end
setenv PATH $__P
unset __P
unset __uname_s __uname_r
unalias __maybe_add
Warner
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