On 23/11/2015 18:54, Achim Gratz wrote:
> Jon Turney writes:
>> So, this is actually quite straightforward to write, and
>> /etc/postinstall/0p_update-info-dir.sh becomes the attached.
>>
>>>> Can this be relied on for all possible file systems?
>>>
>>> Not on FAT.  But then again, FAT is not really a filesystem, rather just
>>> a failed try.
>>
>> But yes, this does nothing useful if /usr/share/info is on a FAT
>> filesystem, as the mtime doesn't change.
>
> So, should we try to guard against that (installations on a USB stick
> are probably the only practical occurence these days)?  I wouldn't mind
> if we just unconditionally rebuild on FAT(32).

Thinking this over, it doesn't seem that hard to use a hash to determine 
if the directory has changed.

How about the attached?

(This will add a dependency on diffutils for cmp)

> Otherwise, it looks good and thanks for writing up a script.