cmd/hakurei: expose current instance identifier

This writes the 16-byte instance identifier to file descriptor specified by --identifier-fd if set, and closes the file.

This enables safely obtaining the new instance's identifier.

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

1 files changed, 4 insertions, 4 deletions

diff --git a/internal/outcome/main.go b/internal/outcome/main.go
index feffb661..a32d220a 100644
--- a/internal/outcome/main.go
+++ b/internal/outcome/main.go
@@ -10,21 +10,21 @@ import (
 )
 
 // Main runs an app according to [hst.Config] and terminates. Main does not return.
-func Main(ctx context.Context, msg message.Msg, config *hst.Config) {
+func Main(ctx context.Context, msg message.Msg, config *hst.Config, fd int) {
 	var id hst.ID
 	if err := hst.NewInstanceID(&id); err != nil {
 		log.Fatal(err.Error())
 	}
 
-	seal := outcome{syscallDispatcher: direct{msg}}
+	k := outcome{syscallDispatcher: direct{msg}}
 
 	finaliseTime := time.Now()
-	if err := seal.finalise(ctx, msg, &id, config); err != nil {
+	if err := k.finalise(ctx, msg, &id, config); err != nil {
 		printMessageError(msg.GetLogger().Fatalln, "cannot seal app:", err)
 		panic("unreachable")
 	}
 	msg.Verbosef("finalise took %.2f ms", float64(time.Since(finaliseTime).Nanoseconds())/1e6)
 
-	seal.main(msg)
+	k.main(msg, fd)
 	panic("unreachable")
 }