[bug #44892] grub-mkconfig -o /dev/null delete /dev/null device !

[Jean-François Maeyhieux]

URL:
  <http://savannah.gnu.org/bugs/?44892>

                 Summary: grub-mkconfig -o /dev/null  delete  /dev/null device
!
                 Project: GNU GRUB
            Submitted by: zentoo
            Submitted on: Tue 21 Apr 2015 08:58:40 AM GMT
                Category: Filesystem
                Severity: Major
                Priority: 5 - Normal
              Item Group: Software Error
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 
                 Release: 2.02~beta1
         Reproducibility: Every Time
         Planned Release: None

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Details:

To simulate a grub configuration file creation, I do:
grub-mkconfig -o /dev/null because grub-mkconfig write information messages
AND configuration on standard output so it's only possible to catch
informations without created configuration by creating a real file. By using
/dev/null as configuration output, grub-mkconfig delete the device !

Note: if -o argurment is a directory, grub-mkconfig write the file in the
directory and don't print an error too.

=> grub-mkconfig need to check if the output path is a real file in order to
do not supress special files as character/block devices.

=> grub-mkconfig need to use stderr as output for informationnal messages




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