Date: Mon, 29 Apr 1996 12:08:40 -0400 From: Garrett Wollman <wollman@lcs.mit.edu> To: Michael Smith <msmith@atrad.adelaide.edu.au> Cc: current@FreeBSD.org Subject: Re: About to make the jump to -current... Message-ID: <9604291608.AA14531@halloran-eldar.lcs.mit.edu> In-Reply-To: <199604280717.QAA10735@genesis.atrad.adelaide.edu.au> References: <199604280136.TAA02941@rover.village.org> <199604280717.QAA10735@genesis.atrad.adelaide.edu.au>
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<<On Sun, 28 Apr 1996 16:47:33 +0930 (CST), Michael Smith <msmith@atrad.adelaide.edu.au> said:
> A question for the wise kernel people - how did the NetBSD folks do their
> variant symlink stuff? I was pondering the possibilities of performing
> 'magic' translations of symlink destination components based on sysctl
> variables. Erk, here's a sample :
> Symlink /usr/include to /usr/include.$PERSONALITY$
> sysctl -w symlink.translation.PERSONALITY="current"
Better make that `fs.generic.symlink.whatever'... Or perhaps
`kern.logical_name.table' (probably make Terry happy). I would use
`@variable' rather than anything involving dollar signs, following the
example of AFS.
Any easy way out of this is to use amd(8). For example, if you were
running a diskless NFS client (something I don't recommend), you might
do:
ln -s /localvar/localvar.'${hostname}' /usr/local/var
where /localvar is defined by the map:
/defaults: type:=nfs;fs:=${autodir}/${rhost}/root;sublink:=${key}
* rhost:=myserver;rfs:=/export/localvar
When `amd' processes a request, it automatically translates references
to its keywords in the pathname passed to it for lookup, and only then
does it look the name up in its map.
-GAWollman
--
Garrett A. Wollman | Shashish is simple, it's discreet, it's brief. ...
wollman@lcs.mit.edu | Shashish is the bonding of hearts in spite of distance.
Opinions not those of| It is a bond more powerful than absence. We like people
MIT, LCS, ANA, or NSA| who like Shashish. - Claude McKenzie + Florent Vollant
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