Date: Thu, 21 Sep 1995 00:53:12 +1000 From: Bruce Evans <bde@zeta.org.au> To: asami@cs.berkeley.edu, hackers@freebsd.org, ports@freebsd.org Subject: Re: ports startup scripts Message-ID: <199509201453.AAA00784@godzilla.zeta.org.au>
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>to be run from /etc/rc. The question is, where do we want that
>"local_startup" directory to be?
Are symlinks to a variable location too ugly/unmanageable? Double links
could be used as both as documentation and to avoid moving directories
out of the way. E.g., for the current problem:
- /etc/rc always references /links/local_startup
- /links/local_startup is a link to either /etc/rc.d or
/usr/local/etc/rc.d, depending on locally best solutions
to the configuration problems mentioned in (1)-(2):
>(1) /etc/rc.d
> - Ports shouldn't touch anything in the root filesystem
> + Central location, easy to maintain
> + Per-machine configuration possible even if /usr/local is NFS shared
>(2) /usr/local/etc/rc.d
> - Shouldn't fix certain location
> - If /usr/local is NFS shared, per-machine configuration is cumbersome
>(3) Same as (2), but use the regular ${PREFIX} (defined as /usr/local
> in bsd.port.mk)
Ideally, all prefixes and paths should be found in one place. /links
would be a reasonably dynamic place - use readlink() to look it up and
standard utilities to manipulate it. The links could be followed
directly or cached by programs. E.g., `make' could look up
/links/bshell (which would normally point to /bin/sh) once and use the
result several times.
>That leaves option (4). We can deal with multiple startup dirs
>easily, just a couple more lines of shell programming. And to
>alleviate the second problem, I propose the following:
> @ Define LOCAL_PREFIX and X11BASE in /etc/sysconfig
> @ In /etc/rc, add a line that generates a file somewhere in /var
> (say, /var/run/paths) with the contents:
>...
readlink() isn't as convenient an interface for some purposes as a
list of variables, but this list could be created easily by
`ls -l /links | sed ... | grep ...' >/var/run/paths.
Bruce
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