Howto set var from command output

Howto set var from command output

[张忠山]

Hush does not support command  substitution
In barebox is there some to set var from a command output?
Or is there a command to do it?


_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

Re: Howto set var from command output

[Sascha Hauer]

On Wed, Apr 19, 2017 at 06:04:17PM +0800, 张忠山 wrote:
> Hush does not support command  substitution
> In barebox is there some to set var from a command output?
> Or is there a command to do it?

There is no way to set a variable from a command output, mostly because
this would be really hard to implement. However, some commands support
setting a variable directly, like for example the basename command.
Which command output do you want to have in a variable?

Sascha


-- 
Pengutronix e.K.                           |                             |
Industrial Linux Solutions                 | http://www.pengutronix.de/  |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox

Re: Howto set var from command output

[Ian Abbott]

On 19/04/17 11:14, Sascha Hauer wrote:
> On Wed, Apr 19, 2017 at 06:04:17PM +0800, 张忠山 wrote:
>> Hush does not support command  substitution
>> In barebox is there some to set var from a command output?
>> Or is there a command to do it?
>
> There is no way to set a variable from a command output, mostly because
> this would be really hard to implement. However, some commands support
> setting a variable directly, like for example the basename command.
> Which command output do you want to have in a variable?

I guess it would be a nice little project for someone, maybe Google 
Summer of Code if that's still going?  After all, MS-DOS has file 
redirection and primitive pipeline support, so I guess it's doable.

-- 
-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti@mev.co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-

_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox