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cmd/hakurei: expose current instance identifier

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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>
This commit is contained in:
Ophestra
2025-11-10 07:51:00 +09:00
parent fad419c2a2
commit bb92e3ada9
4 changed files with 44 additions and 18 deletions
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8
internal/outcome/main.go
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@@ -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")
}