[PATCH v2 0/3] commands: devlookup: add option to print kernel root option

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

There exists currently no way to view the kernel root option that
barebox would generate when instructed to via global.bootm.root_dev,
but without actually mounting the file system.

Add a new devlookup -k option that can print this. This can be useful in
scripts that want to fixup the root line, so it's interpreted by the rdinit,
but not by the kernel.

This applies on top of
https://lore.barebox.org/barebox/20250401104806.3959859-1-a.fatoum@pengutronix.de/T/#t

v1 -> v2:
  - add new option to devlookup instead of findmnt as it's not really
    about mounting

Ahmad Fatoum (3):
  commands: devlookup: factor out cmd_export_val
  commands: findmnt: add support for exporting target as variable
  commands: devlookup: add option to print kernel root option

 commands/Kconfig     |  3 ++-
 commands/devlookup.c | 50 +++++++++++++++++++++++++-------------------
 commands/findmnt.c   | 31 ++++++++++++++++++++-------
 common/command.c     | 13 ++++++++++++
 include/command.h    |  2 ++
 5 files changed, 69 insertions(+), 30 deletions(-)

-- 
2.39.5