bug#32810: As Bug of "parted": Do not need show this message = not a error

On Sun, Sep 23, 2018 at 04:04:58PM +0300, ПИван Петров wrote:
> Reason of this "message bug" is: search line with "###" !
> 
> ========== Output =====================
> root@machine:/home/user# dd if=/dev/zero of=/dev/sdb status=progress bs=128M
> dd: write error '/dev/sdb': No free space on device
> 9+0 got records
> 8+0 sent records
> 1073741824 bytes (1,1 GB, 1,0 GiB) copied, 0,962915 s, 1,1 GB/s
> 
> root@machine:/home/user# parted --machine /dev/sdb unit B print free quit
> Ошибка: /dev/sdb: метка диска не определена   ###: (translated: "Error:
> /dev/sdb: label of disk not defined")
> BYT;
> /dev/sdb:1073741824B:scsi:512:512:unknown:VMware, VMware Virtual S:;
> 
> root@machine:/home/user# $?
> 0: command not found

If you use --script it will return a 1 in this case.


> 
> root@machine:/home/user# parted --version
> parted (GNU parted) 3.2
> Copyright © 2014 Free Software Foundation, Inc.
> Лицензия GPLv3+: GNU GPL версии 3 или новее <
> http://gnu.org/licenses/gpl.html>
> Это свободное ПО: вы можете продавать и распространять его.
> Нет НИКАКИХ ГАРАНТИЙ до степени, разрешённой законом.
> 
> Автор программы — <
> http://git.debian.org/?p=parted/parted.git;a=blob_plain;f=AUTHORS>.
> 
> root@machine:/home/user# uname -a
> Linux machine 4.15.0-34-generic #37-Ubuntu SMP Mon Aug 27 15:21:48 UTC 2018
> x86_64 x86_64 x86_64 GNU/Linux
> ============= End Output ==============================
> 
> I think, that the message "###" is not a error, because:
> 1. already undestand, that the disk cant have disk table and do not have
> labels of partitions (already="unknown" table)
> 2. for "--machine" output need strong/constantly output, without "sudden
> messages" (without ";" at end of line)
> 
> Please remove this message from stderr - it is not a error and this message
> hinder to "--machine" output!

I agree, somewhat, but it would be difficult to squash parted's normal
exception handling for cases like this. Note that it *is* output on
stderr so if you don't want to capture it just grab stdout. And if you
use --script it will return a proper error result code.

-- 
Brian C. Lane (PST8PDT)