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Mount ESP under /efi if possible + identify EFI run source (#158)

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Itxaka
2023-09-25 14:14:56 +02:00
committed by GitHub
parent 1211b070c9
commit 7f2813e5b7
3 changed files with 102 additions and 4 deletions
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21
internal/utils/common.go
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@@ -233,3 +233,24 @@ func GetHostProcCmdline() string {
}
return proc
}
// EfiBootFromInstall will try to check the /sys/firmware/efi/LoaderDevicePartUUID-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f
// systemd vendor Id is 4a67b082-0a4c-41cf-b6c7-440b29bb8c4f and will never change
// LoaderDevicePartUUID contains the partition UUID of the EFI System Partition the boot loader was run from. Set by the boot loader.
// This will return true if we are running from a DISK device, which sets the efivar
// This wil return false when running from a volatile media, like CD or netboot as it cannot infer where it was booted from
// Useful to check if we are on install phase or not
// This efi var is VOLATILE so once we reboot is GONE. No way of keeping it across reboots, its set by the bootloader.
func EfiBootFromInstall() bool {
file := "/sys/firmware/efi/efivars/LoaderDevicePartUUID-4a67b082-0a4c-41cf-b6c7-440b29bb8c4f"
readFile, err := os.ReadFile(file)
if err != nil {
Log.Debug().Err(err).Msg("Error reading LoaderDevicePartUUID file")
return false
}
if len(readFile) == 0 || string(readFile) == "" {
Log.Debug().Str("file", string(readFile)).Msg("Error reading LoaderDevicePartUUID file")
return false
}
return true
}