[tex-live] updmap and /
daleif at imf.au.dk
Sun Mar 1 18:21:35 CET 2009
Zdenek Wagner wrote:
> 2009/3/1 Reinhard Kotucha <reinhard.kotucha at web.de>:
>> On 24 February 2009 Zdenek Wagner wrote:
>> > And why is it necessary to "cd" anywhere? I would do it like that:
>> > rm -rf "$tmpdir" if -d "$tmpdir";
>> Thomas explained it to me some years ago: Since you can't remove your
>> current working directory, you have to make sure that you are not
>> inside a directory you want to remove. The reason he chose "/" is
>> that this directory always exists and never is supposed to be removed.
>> Please also note that Thomas usually installs signal handlers in order
>> to remove temporary files when the script aborts unexpectedly. Hence,
>> the code you propose will not work reliably. You don't know where you
>> are if the process is killed by a signal. Yes, it's necessary to "cd"
>> to a directory outside "$tmpdir".
> In theory, the permissions of a directory can be 0744 so that
> everybody can read it but cannot cd into it. It is possible to cd into
> subdirectories but name completion by TAB does not work. It would be
> quite strange for /. It might help to store `pwd` at the beginning of
> the script because the user can cd into it and it should be outside
> $tmpdir (I hope).
I'm trying to figure out why our system is set like this, not sure if it
is own own installation script or if it is redhat.
I any case, a script like this should not make the assumption that / is
readable since the user has no business there.
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