Date: Mon, 08 Jun 1998 12:05:22 -0700 From: Mike Smith <mike@smith.net.au> To: Terry Lambert <tlambert@primenet.com> Cc: wjw@IAEhv.nl, winter@jurai.net, mike@smith.net.au, current@FreeBSD.ORG Subject: Re: Variant Link implementation (Was: Re: lorder problem: ....... ) Message-ID: <199806081905.MAA00529@dingo.cdrom.com> In-Reply-To: Your message of "Mon, 08 Jun 1998 18:12:04 -0000." <199806081812.LAA11746@usr04.primenet.com>
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> > => > Whoops; just to clarify; vlink_xlate(tok, dbuf, &dbofs) copies the
> > => > value of the token at (tok) into (dbuf) at (dbofs) presuming that
> > => > (dbofs) would not exceed the allowed size, updates (dbofs) and returns
> > => > 0 (all OK), 1 (not enough room) or 2 (no translation for tok available).
> > =>
> > => Would it not be nicer to introduce a new file/link type? This would allow
> > => lower overall cost as you would not have to scan each link, only those
> > => links of the proper type.
> >
> > That's one way of doing it. Is was first thinking of doing it through sysctl
> > for the whole system on or off. But then that is a sort of blunt axe
> > solution.
>
> A new link type is overkill. The evaluation of symlinks uses FORTRAN-style
> mutual recursion (into the same buffer) anyway.
>
> The speed of symlink evaluation isn't really an issue unless the "${" / "}"
> is found to be there anyway (or shouldn't be).
>
> It seems to me that the code Mike did fails on the "${" but NOT "}" case.
It shouldn't; if it doesn't find the '}' it should fall off the end,
copy the $ and try again. I didn't want to abort on a separator
because it would cause eg. this to not work:
bin$ -> bin.${DOS/Win version}
--
\\ Sometimes you're ahead, \\ Mike Smith
\\ sometimes you're behind. \\ mike@smith.net.au
\\ The race is long, and in the \\ msmith@freebsd.org
\\ end it's only with yourself. \\ msmith@cdrom.com
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