Re: [DNG] Shim

[Irrwahn]

On Mon, 13 Jun 2016 19:37:44 +, Noel Torres wrote:
> Hi folks...
> 
> Where can I find a *good* and *deep enough* explanation of what a  
> "shim" is 

https://en.wikipedia.org/wiki/Shim_%28computing%29

In short: A shim is an adaptation or compatibility layer 
that enables software to use functionalities of other 
components not actually present on the system (or present, 
but in an older version, or the like). It does so by 
providing the desired functionality itself, or mapping it 
to other third party libraries, or simply by faking it. 

A typical example would be a "thin" wrapper library that 
maps one API (-version) onto another API (-version).

(In technical engineering context, a shim is generally 
some kind of lining plate or metal spacer (e.g. a simple 
washer) used to mechanically adapt pieces of machinery or 
equipment.)

> (in the context of systemd and EFI), 

The systemd-shim package in debian allows software to use 
systemd functionality without the need of actually having 
systemd installed and running as PID1 on the system.

Not sure about the (U)EFI context. I assume it would be a 
signed bootloader that allows some kind of chain-loading 
other arbitrary (unsigned) OS kernels.

> but also *easy enough*  
> to explain it to some colleagues at work?

That would depend on where you work, and how well educated 
your coworkers are. ;-D  

HTH, Regards
Urban


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Re: [DNG] Shim

[Arnt Karlsen]

On Mon, 13 Jun 2016 19:37:44 +, Noel wrote in message 
<20160613193744.horde.6as5qe3gnqf8zk7lci_w...@rolamasao.org>:

> Hi folks...
> 
> Where can I find a *good* and *deep enough* explanation of what a  
> "shim" is (in the context of systemd and EFI), but also *easy
> enough* to explain it to some colleagues at work?

..I only know the banana republic politics part of this.

..does your colleagues know how banana republic politics works?

..do you know how banana republic politics works?
Do you know it well enough to explain it to your 
colleagues?

..are you ok with them viewing you as a crack head conspiracy 
theorist until they know, or get get first hand experience 
the hard way themselves?

..good luck, you'll need it!

-- 
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
  Scenarios always come in sets of three: 
  best case, worst case, and just in case.
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