[arch-releng] [RFC] [PATCH] [configs/releng] Converts relative to absolute paths inside syslinux*.cfg

[Gerardo Exequiel Pozzi]

On 11/24/2011 06:55 AM, Thomas Bächler wrote:
> Am 24.11.2011 08:24, schrieb Gerardo Exequiel Pozzi:
>> * In this way we have unified directory scheme between pxelinux and {sys,ext,iso}linux
>> * Also enable IPAPPEND (will show a non-harm warning message under non-pxelinux bootloaders
>>
>> Signed-off-by: Gerardo Exequiel Pozzi<vmlinuz386 at yahoo.com.ar>
> As mentioned in the other email, this will force everyone to use /arch/
> as the archiso folder. When putting this on USB, you might want to use a
> different path - this would force you to edit tons of config files.
When "repacking" yes, not when build since this is controlled by 
%INSTALL_DIR%.
We are actually doing this for kernel and initramfs.
>
> I am more and more convinced we should do this for PXE
>
> 1) Use a separate configuration for pxelinux, specify /arch as option
> 210 and "boot/syslinux/pxelinux.cfg" as 209.
> 2) Use a loadconfig trick, including a chdir (as for isolinux) to switch
> directory. I guess ".." in addresses works the same as with syslinux then.

OK, but as prefix we can have /

This is what I done now:

* All paths in *.cfg like now I just changed absolute path thats 
reference kernel and initramfs to relative ../%ARCH%/vmlinuz
* enabled IPAPPEND 3 (I can not see the warning message)

put a file
%INSTALL_DIR%/boot/syslinux/pxelinux.cfg with the same contents as doing 
in /isolinux/isolinux.cfg

# dnsmasq --port=0 --enable-tftp --tftp-root=/tmp/pxeboot 
--dhcp-boot=/arch/boot/syslinux/gpxelinux.0,192.168.0.77 
--dhcp-range=192.168.0.2,192.168.0.254,8640 
--dhcp-option-force=210,http://192.168.0.77 
--dhcp-option-force=209,/arch/boot/syslinux/pxelinux.cfg
# darkhttpd /tmp/pxeboot


>
> Absolute paths are very ugly. Uglier than a stupid loadconfig trick.
> Even uglier than providing two completely different sets of config files
> (one for PXE, one for the rest).
haha, yes they are really ugly.
>
> On another note: Don't you have to modify the config files for PXE
> anyway? You need to add the nbd/curl/nfs options to the command line, right?
>
Yes for curl and nfs, since nbd is the default when ip= is present and 
nothing more.

-- 
Gerardo Exequiel Pozzi
\cos^2\alpha + \sin^2\alpha = 1