[PATCH] Add Menu Framework

[Sascha Hauer]

On Fri, Aug 20, 2010 at 05:21:01AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > menu -e -a -m boot -c "menu -s -m network" -R -d "Network settings ->"
> > 
> > we could have a
> > 
> > menu -e -a -m boot -u network -R -d "Network settings ->"
> > 
> > We could than automatically add a 'back' entry if a menu is a submenu.
> I disagree here about the automatic adding of a 'back" entry
> as you may want to put at the top or the bottom or where ever you want and you
> may not write the menu in English or the text "Back"
> so I will prefer to let it done manually as this
> 
> menu -a -m boot -d "Boot Menu"
> menu -a -m network -d "Network settings"
> menu -e -a -m network -c "echo ok" -R -d "test"
> menu -e -a -m network -u boot -d "Back"
> menu -e -a -m boot -u network -d "Network settings ->"
> menu -e -a -m boot -c reset -R -d "Exit"

That's better, agreed.

> 
> > 
> > - It shouldn't be possible to add the same menu twice. example:
> > 
> > barebox at Phytec phyCORE-i.MX31:/ menu -a -m boot -d "Boot Menu"
> > barebox at Phytec phyCORE-i.MX31:/ menu -a -m boot -d "Boot Menu"
> > barebox at Phytec phyCORE-i.MX31:/ menu -l
> > boot: Boot Menu
> > boot: Boot Menu
> > barebox at Phytec phyCORE-i.MX31:/
> fix
> > 
> > - Removing entries does not work as expected. example:
> > 
> > menu -a -m boot -d "Boot Menu"
> > menu -e -a -m boot -c boot -d "Boot"
> > menu -e -a -m boot -c reset -d "Reset"
> > menu -e -a -m boot -c "exit" -d "Command line"
> > menu -e -r -m boot -n 1
> > menu -s -m boot
> fix
> > 
> > - commands should always return positive error codes. A good practice is
> >   to pass -E* values up to do_menu, use strerror() to print the error
> >   code and return 1 afterwards.
> I agree but but of the time there is no -E* related to this Framework
> 
> so do u want to create them?

No. The use of strerror might not be appropriate here, but all functions
used should return some error value instead of -1, with -EINVAL as
fallback when no better value can be found.

> > 
> > There is a 'break' missing here.
> > 
> fix
> > > +			cm.action = action_add;
> > > +			break;
> > > +		case 'r':
> > > +			cm.action = action_remove;
> > > +			break;
> > > +		case 'c':
> > > +			cm.command = optarg;
> > > +			break;
> > 
> > Thank you for this work. I really appreciate it ;)
> Your welcome
> My goal was to make the bootloader more easy to use for end user and
> device without keyboard

Do you know openmoko? They also have a menu in U-Boot, but it's more or
less hardcoded to their exact needs.

> 
> and keep 2 API
> commands as it's easy to manage at run time
> 
> and C for very complex menu
> 
> I plan to have this also via FrameBuffer and with a background image
> so maybe barebox could replace grub & co aneday :)

A long way to go ;)

Sascha

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