u-root
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u-root
uefivars is still using the deprecated /sys/firmware/efi/vars interface
Describe the bug
The uefivars package is still using the deprecated /sys/firmware/efi/vars interface.
To Reproduce
Run u-root under linux 5.4.x compiled with CONFIG_EFI_VARS=n and CONFIG_EFIVAR_FS=y.
Expected behavior
I expected the cmds/exp/bootvars (which is using /sys/firmware/efi/vars at https://github.com/u-root/u-root/blob/b81eccb0c419d45255b534c0b3644a191748adf0/pkg/uefivars/vars.go#L24-L25) to work out-of-the-box by using the /sys/firmware/efi/efivars interface.
For more information about the two interfaces see Linux kernel config options for UEFI.
@MDr164 did you got a change to look at this?
We added https://github.com/u-root/u-root/blob/main/cmds/exp/efivarfs/efivarfs.go quite some time ago which uses the efivarfs, maybe that does what you're looking for?
@MDr164 I didn't notice that new command. thank you!
Though, it seems https://github.com/u-root/u-root/blob/main/pkg/efivarfs/varfs.go#L193-L195 does not work in my machine, as it does not return anything (and ls -la does):
/# efivarfs list
/# ls -la /sys/firmware/efi/efivars/
drwxr-xr-x root 0 0 Oct 16 19:28 .
-rw-r--r-- root 0 66 Oct 16 19:28 Boot0000-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 106 Oct 16 19:28 Boot0001-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 92 Oct 16 19:28 Boot0002-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 6 Oct 16 19:28 BootCurrent-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 8 Oct 16 19:28 BootOptionSupport-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 10 Oct 16 19:28 BootOrder-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 126 Oct 16 19:28 ConIn-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 695 Oct 16 19:28 ConInDev-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 77 Oct 16 19:28 ConOut-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 661 Oct 16 19:28 ConOutDev-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 77 Oct 16 19:28 ErrOut-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 661 Oct 16 19:28 ErrOutDev-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 18 Oct 16 19:28 Key0000-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 18 Oct 16 19:28 Key0001-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 8 Oct 16 19:28 Lang-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 17 Oct 16 19:28 LangCodes-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 8 Oct 16 19:28 MTC-eb704011-1402-11d3-8e77-00a0c969723b
-rw-r--r-- root 0 12 Oct 16 19:28 OsIndicationsSupported-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 7 Oct 16 19:28 PlatformLang-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 22 Oct 16 19:28 PlatformLangCodes-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 112 Oct 16 19:28 PlatformRecovery0000-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 5 Oct 16 19:28 SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 5 Oct 16 19:28 SetupMode-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 68 Oct 16 19:28 SignatureSupport-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 6 Oct 16 19:28 Timeout-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 5 Oct 16 19:28 VarErrorFlag-04b37fe8-f6ae-480b-bdd5-37d98c5e89aa
-rw-r--r-- root 0 5 Oct 16 19:28 VendorKeys-8be4df61-93ca-11d2-aa0d-00e098032b8c
-rw-r--r-- root 0 8 Oct 16 19:28 certdb-d9bee56e-75dc-49d9-b4d7-b534210f637a
-rw-r--r-- root 0 8 Oct 16 19:28 certdbv-d9bee56e-75dc-49d9-b4d7-b534210f637a
That's odd, I guess I'll have to check if the code regressed because we have been using it in a different project and that one still worked fine last time I checked.