Re: ^M chars in *Async Command Output*

[Andreas Politz <politza@fh-trier.de>]

Sebastian Tennant wrote:
> Hi all,
> 
> When I issue asynchronous commands using shell-command, for example:
> 
>   M-! apt-get update & RET
> 
> buffer *Async Command Output* is filled with ^M characters and the
> output is generally a mess.
> 
> Apparently not all Emacsen behave in this way though.
> 
> If you have a moment, could you perform a similar test and let us know
> if the same thing happens to you.  Include the Emacs version number in
> your follow-up, and if it _does_ happen to you and you have a little
> more time, whether you consider it a feature or a bug?
> 
> Your assistance is much appreciated.
> 
> Sebastian

I tried it with aptitude, it's the same. The process uses carriage-returns
to display the progress `widget' this show up as '^M' in emacs buffer.
Somehow this processes think they are running in a terminal, I think
because asynchronous shell-commands are runnning/started in a shell.

In a terminal :

$ echo -e 'Hello\rWorld'
$ World

In emacs :

M-! echo -e 'Hello\rWorld' &
Hello ^MWorld

Maybe a process-filter-function is the solution or pipe the command
through the utility 'col', like
M-! apt-get update | col &

-ap