[PATCH] efi_loader: Add support for .wic files in URI boot path

[Heinrich Schuchardt]

Am 26. Juli 2025 18:30:54 MESZ schrieb Mark Kettenis <mark.kettenis at xs4all.nl>:
>> Date: Sat, 26 Jul 2025 09:45:16 -0600
>> From: Tom Rini <trini at konsulko.com>
>> 
>> On Fri, Jul 25, 2025 at 07:56:39PM +0200, Heinrich Schuchardt wrote:
>> > Am 25. Juli 2025 19:35:33 MESZ schrieb Javier Tia <javier.tia at linaro.org>:
>> > >Together with current '.iso' and '.img', the try_load_from_uri_path
>> > >function now allows files with the '.wic' extension as viable bootable
>> > >images.
>> > 
>> > Why wouldn't you simply name your files *.img?
>> 
>> The answer has been lost to time at this point, since output has been
>> ".wic" for over a decade now.

First match in Google:

A WIC file is a raster image saved in the Java Wavelet Image Codec (JWIC) format.

<https://en.m.wikipedia.org/wiki/List_of_file_formats> does not list .wic at all.

It seems that .wic is not a usual ending for raw disk images while .img is well known.

Best regards

Heinrich

>
>Note that other EFI implementations don't support '.wic' either.
>WHich is why we switched the OpenBSD installer disk images from '.fs'
>to '.img' some years ago specifically to support EFI HTTP boot.
>
>> > Shouldn't we get away from the DOS age routine of relying on
>> > filename extensions?
>> > 
>> > Just check if the fileheader is a PE header or if it is a known
>> > partitoning scheme.
>> 
>> Looking in to a cleaner more general solution is worthwhile, I agree.
>> 
>> -- 
>> Tom
>> 
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