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[bug #30507] way to read out configured serial parameters

From: Mario 'BitKoenig' Holbe
Subject: [bug #30507] way to read out configured serial parameters
Date: Wed, 21 Jul 2010 12:13:22 +0000
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv: Gecko/20100721 Iceweasel/3.5.11 (like Firefox/3.5.11)


                 Summary: way to read out configured serial parameters
                 Project: GNU GRUB
            Submitted by: holbe
            Submitted on: Wed 21 Jul 2010 02:13:21 PM CEST
                Category: Configuration
                Severity: Major
                Priority: 5 - Normal
              Item Group: Feature Request
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: other
         Reproducibility: None
         Planned Release: None



It would be great for grub.cfg scripting if there were a way to read-back
once configured parameters from the serial command.

For example:
If there was a way to read out configured serial parameters, it would be
possible to generatate console= configuration items for linux and/or
memtest86+ based on grubs serial configuration.

I'm sure there are other examples for other commands where a similar
functionality would also be great (like terminals configuration, like RAID
configuraion, ...).

Of course, in this special case it would be possible to store the parameters
for the serial command in separate variables, configure serial with them, and
re-use the variables later for other configuration items. I'm not sure whether
or not this is the "grub way to do it". It would just be easier to be able to
read the configuration back from the serial command than trying to keep
variables and the real configuration in sync.


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