How to test grub_iso9660_uuid from userland ? - Thomas Schmitt via Grub-devel

From: Thomas Schmitt via Grub-devel <grub-devel@gnu.org>
To: grub-devel@gnu.org
Cc: Thomas Schmitt <scdbackup@gmx.net>
Subject: How to test grub_iso9660_uuid from userland ?
Date: Mon, 01 Jul 2024 16:08:05 +0200	[thread overview]
Message-ID: <6473304583545531659@scdbackup.webframe.org> (raw)

Hi,

i found a wrong word in an error message of grub-core/fs/iso9660.c
function grub_iso9660_uuid():

         grub_error (GRUB_ERR_BAD_NUMBER, "no creation date in filesystem to generate UUID");

The missing entity would be the modification date
  data->voldesc.modified
rather than the creation date
  data->voldesc.created

The fix is obviously simple. But i have no idea how to get the code
execution to this function for testing.
An ISO with 0 date would be easy to fake. A use case known to me is in
GRUB configuration with command "search" and option "--fs-uuid".
In grub-fstest.c i see no opportunity to perform "search".

Any idea how to test grub_iso9660_uuid() from userland of a running
GNU/Linux ?

Have a nice day :)

Thomas

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