Bug#741365: Unnecessary device-mapper errors - /usr/share/grub/grub-mkconfig_lib

[Elimar Riesebieter]

Control: tag -1 patch

* Steve Graham <bugs at annaghvarn.plus.com> [2014-08-16 13:27 +0100]:

> I also have a system with no LVM requirement.
> 
> The lines "/proc/devices: No entry for device-mapper found" are emitted by
> grub-probe. In general, the grub scripts redirect grub-probe's stderr to
> /dev/null to suppress these, but the subroutines in
> /usr/share/grub/grub-mkconfig_lib aren't completely consistent in doing so.
> 
> I quickly hacked /usr/share/grub/grub-mkconfig_lib to add the redirection on
> every invocation of grub-probe and the messages have gone away.
> 
> For example, the original line
>    partmap="`"${grub_probe}" --device $@ --target=partmap`"
> was changed to
>    partmap="`"${grub_probe}" --device $@ --target=partmap`" 2> /dev/null
> 
> (I'm not supplying an actual diff because I haven't checked the full logic
> and may have broken something. It was just a quick experiment.)

Attached patch I've successfully tested on i386_soft-raid,
amd64_one-disk, amd64_LVM_soft-raid and ppc_one-disk

Elimar
-- 
 Learned men are the cisterns of knowledge,
  not the fountainheads ;-)
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