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Message-ID: <20050305193249.65710.qmail@web53401.mail.yahoo.com>
Date: Sat, 5 Mar 2005 11:32:48 -0800 (PST)
From: Dave <d_inabox AT yahoo DOT com>
Subject: Re: chere doesn't cd to directory
To: cygwin AT cygwin DOT com
In-Reply-To: <Pine.GSO.4.61.0503050929040.25883@slinky.cs.nyu.edu>
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--- Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu> wrote:
> On Sat, 5 Mar 2005, Dave wrote:
> > --- Igor Pechtchanski wrote:
> > > On Fri, 4 Mar 2005, Dave wrote:
> > > > The cd occurs in /etc/profile for bash, ash, and pdksh; /etc/zprofile
> > > > for zsh; /etc/csh.login for tcsh.
> >
> > > I don't recall if this was part of the discussion, but any particular
> > > reason you're not doing this in a /etc/profile.d script instead?  That
> > > way, it would work even with a custom /etc/profile.
> >
> > I honestly hadn't thought of that... and I don't recall it being
> > mentioned.
> >
> > The issue is that chere wants to stop the standard login script from
> > doing the usual cd $(HOME). The profile.d scripts get run before the cd,
> > and hence th cd happens anyway. If the order were changed, we'd have
> > lost the directory we wanted anyway.

<snip useful suggestions>

These (and also that suggested by John in an earlier e-mail) still require a
change to /etc/profile. i.e. People with custom /etc/profiles will still need to
update them.

> Another alternative is to wrap /etc/profile in another script and use
> bash's --noprofile and --rcfile options (again, don't recall if this has
> been discussed before).

This one may work with bash, but I'm guessing the other shells aren't as
accomodating.

> > Also, tcsh reads the profile.d scripts from csh.cshrc rather than
> > csh.login. So a non login tcsh shell would also run the snippet (and cd
> > $(HOME)).
> 
> Ah, this one's easy to solve.  Just unset the variable after you do the
> first "cd $(HOME)". :-)  Then subsequent invocations will skip the
> snippet.

You've misunderstood me on this one. The csh profile.d file would require a  {
if CHERE_INVOKING unset CHERE_INVOKING; else cd HOME }. This would be run for
login and non login shells. A login shell will then work as expected. A non
login shell (which doesn't normally cd HOME) would cd HOME. This can be worked
around, but why make trouble?

Anyway, I don't mind coming up with a more update (and maintainer) friendly way
for chere to get to the right directory, but I don't see that it's worth the
effort and pain of users having to change their profile again.

That said these modifications would take place in the base-files, zsh and tcsh
packages (and chere wouldn't change); so if John, Peter or Corinna want to
refactor things, that's OK with me.

Dave.


	
		
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