Improved error checking for fsverity_init/odsign.
When attempting to load a non-existent cert I got:
06-10 12:48:11.939 662 662 E fsverity_init: Failed to add key: Invalid argument
06-10 12:48:11.940 662 662 E fsverity_init: Failed to load key from stdin
06-10 12:48:11.941 648 648 I odsign : Added CompOs key to fs-verity keyring
Which looks like everything worked when nothing did.
Added more error checks on both sides.
Test: Presubmits
Test: Manual
Change-Id: Ib2b17ce75e58dafb0ad6905106e35b11b55e91d0
2 files changed