allow virtual block devices

[tristan-k]

I'm trying to format a veracrypt encrypted device with format-udf but it fails because it only searches for devices in the /dev/ directory. I changed every appearance of /dev/$Device to /dev/mapper/$DEVICE but the script complains about:

[-] <device> is of invalid form

Please allow virtual block devices to be formatted with format-udf.

[JElchison]

Hi @tristan-k! Thanks for the note. This is a good idea.

The easy workaround for you is to simply comment out line 354:

(echo "$DEVICE" | egrep -q '^(([hs]d[a-z])([1-9][0-9]*)?|(disk[0-9]+)(s[1-9][0-9]*)?)$') || (echo "[-] <device> is of invalid form" >&2; false)

This will allow the validation to pass that you were running into. You may have to comment out a similar check a few lines below (line 379).

However, after having removing this validation, you may then run into the reason for which the validation exists, which is verifying that the requested partition type matches the device provided (i.e. partition or entire disk). (Recall that UDF was designed for entire-disk formatting.) I'm curious how udftools will perform on that type of mapped block device.

I don't have a /dev/mapper/ device setup that would allow me to test at the moment. Would you mind reporting back after you give it a shot?

If you're successful, I have some ideas on how to more elegantly add support for mapper devices.

[Heziode]

Hi,

I've test your suggestion @JElchison (plus some edit) and this work fine (on Linux and Windows).

Lines I've commented :

• 309
• 334
• 614
• 615
  Link
  So, I think you can add support of /dev/mapper/ without any issue.