internal/uevent: recoverable errors

This runs in the Rosa OS init, so recover as much as possible, as otherwise it is likely to require a full system reboot to resume event processing. The caller is responsible for reporting the error.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/uevent/action.go

@@ -59,6 +59,9 @@ func (act KobjectAction) MarshalText() ([]byte, error) {
 // not yet supported by this package.
 type UnsupportedActionError string
 
+var _ Recoverable = UnsupportedActionError("")
+
+func (UnsupportedActionError) recoverable() {}
 func (e UnsupportedActionError) Error() string {
 	return "unsupported kobject_action " + strconv.Quote(string(e))
 }

internal/uevent/uevent.go

@@ -9,6 +9,9 @@ import (
 	"hakurei.app/internal/netlink"
 )
 
+// Recoverable is satisfied by errors that are safe to recover from.
+type Recoverable interface{ recoverable() }
+
 // Conn represents a NETLINK_KOBJECT_UEVENT socket.
 type Conn struct{ conn *netlink.Conn }