make data available for a certain amount of time

Peter Pentchev roam at
Fri Jul 11 12:35:28 CEST 2008

On Thu, Jul 10, 2008 at 06:14:27PM +0200, Florian Philipp wrote:
> On Thu, 10 Jul 2008 14:32:20 +0200
> "Sander de Bakker" <n00bical at> wrote:
> > Hello Faramir and Robert,
> > 
> > thank you for the responses.
> > 
> > I want everyone to be able to acces the data as long as the data is
> > valid. When the data becomes invalid i want it to be inaccesible for
> > everyone.
> > 
> > I want to control and force when the data should be invalid, i was
> > thinking of using the expiration of a gpg key.
> > 
> > Any suggestions are appreciated.
> > 
> > N00bical
> What I've seen once was a self-extracting archive built with bash. It
> was basically a bash-script with some binary data attached to it.
> It was created with something like:
> #!/bin/bash
> cat archive.tar >
> The script did something like
> #!/bin/bash
> tail -n 30 | tar x

Errr, that's a bit off-topic, but it is *much* easier to do that with
shar (in the base system on most OS's, or in a package named sharutils
or similar on most Linux distributions).

Of course, shar wants to encode the binary data and thus makes the file
a bit bigger than just a binary blob, but this is actually a good thing
in view of all the weird and wonderful (not!) ways that various shells
treat "special", "graphical", and other interesting characters.


Peter Pentchev	roam at    roam at    roam at
PGP key:
Key fingerprint	FDBA FD79 C26F 3C51 C95E  DF9E ED18 B68D 1619 4553
This sentence claims to be an Epimenides paradox, but it is lying.
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