GNU bug report logs - #64607
parted command is not support Brace Expansion in bash shell

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Nguyen Trung Hieu <thaygiaoth <at> gmail.com>
To: bug-parted <at> gnu.org
Subject: parted command is not support Brace Expansion in bash shell
Date: Fri, 14 Jul 2023 10:17:58 +0700

[Message part 1 (text/plain, inline)]

Hi all

ll /dev/sd{c,d,e} --> OK

parted /dev/sd{c,d,e} print --> NOT OK

[image: image.png]

Is it a bug or a feature still not available?

Is it possible add more codes for parted to support Brace Expansion in bash
shell?

Thank you very much!

[Message part 2 (text/html, inline)]

[image.png (image/png, inline)]

Message #8 received at 64607 <at> debbugs.gnu.org (full text, mbox):

From: bill-auger <bill-auger <at> peers.community>
To: Nguyen Trung Hieu <thaygiaoth <at> gmail.com>
Cc: 64607 <at> debbugs.gnu.org
Subject: Re: bug#64607: parted command is not support Brace Expansion in
 bash shell
Date: Fri, 14 Jul 2023 04:10:49 -0400

On Fri, 14 Jul 2023 10:17:58 +0700 Nguyen wrote:
> parted /dev/sd{c,d,e} print --> NOT OK
> 
> Is it a bug or a feature still not available?
> 
> Is it possible add more codes for parted to support Brace Expansion in bash
> shell?

not a bug; and not related to the shell - the feature simply does not exist

when you try that you will notice the "Usage" BNF

  Usage: parted [OPTION]... [DEVICE [COMMAND [PARAMETERS]...]...]

that is a very specific form which specifies how to pass arguments - the way to
read that is to notice the square brackets [] and the ellipsis ...

square brackets denote optional arguments, and the ellipsis denote that multiple
of the preceding argument may be given - in this case, the command may take
only zero or one 'DEVICE' argument, but may have zero or multiple 'OPTION',
'COMMAND', and 'PARAMETERS'

so this is not related to shell brace expansion - the program expects only one
device argument - of course, someone could add that feature, but my guess is
that it was deemed undesirable for some reason, or it probably would have been
implemented long ago

to get the result you wanted, you could run it multiple times

  $ for device in /dev/sd{c,d,e} ; do parted $device print ; done ;

Message #13 received at 64607-close <at> debbugs.gnu.org (full text, mbox):

From: "Brian C. Lane" <bcl <at> redhat.com>
To: Nguyen Trung Hieu <thaygiaoth <at> gmail.com>
Cc: 64607-close <at> debbugs.gnu.org
Subject: Re: bug#64607: parted command is not support Brace Expansion in bash
 shell
Date: Fri, 14 Jul 2023 11:32:25 -0700

On Fri, Jul 14, 2023 at 10:17:58AM +0700, Nguyen Trung Hieu wrote:
> Hi all
> 
> ll /dev/sd{c,d,e} --> OK
> 
> parted /dev/sd{c,d,e} print --> NOT OK
> 
> [image: image.png]
> 
> Is it a bug or a feature still not available?
> 
> Is it possible add more codes for parted to support Brace Expansion in bash
> shell?
> 
> Thank you very much!

brace expansion is a shell feature, parted can't support it because it
would imply operating on multiple disks at once :) eg. it is the same as
trying to run:
parted /dev/sdc /dev/sdd /dev/sde print

which doesn't make sense to parted. And even if it did, the only useful
command would be print. You wouldn't want to run mkpart on multiple
devices at once.

Brian

-- 
Brian C. Lane (PST8PDT) - weldr.io - lorax - parted - pykickstart

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