Re: [Help-bash] play audio-CD in consol

[Mart Frauenlob]

On 30.01.2013 01:26, Gerard ROBIN wrote:
> On Tue, Jan 29, 2013 at 02:52:19PM +0100, Mart Frauenlob wrote:
> > Date: Tue, 29 Jan 2013 14:52:19 +0100
> > From: Mart Frauenlob <address@hidden>
[...]
> > if ! ((! cpt && run ? ++cpt : 0)); then
> >         alsaplayer ...
> > fi
>
> like this is better:
> if  ((! cpt && run ? ++cpt : 0)); then ...

I put the negation because you didn't have any commands executed but 
cpt=$(( $cpt+1 )), which now is inside the conditional evaluation.

> there is one thing I do not understand, is how to use the variable
> PROMPT_COMMAND and what is the advantage rather than using the prompt function

PROMPT_COMMAND
              If set, the value is executed as a command prior to 
issuing each primary prompt.

So if you put in:
PROMPT_COMMAND="printf 'alsaplayer> '"
it should do the same as your prompt function.
But maybe this is an option for you?

x="$PS1"
PS1="alsaplayer> "
your_commands_whatever
PS1="$x" # reset if needed

Best regards

Mart