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package systemd
import (
"log"
"sync"
sysdnotify "github.com/iguanesolutions/go-systemd/v5/notify"
"github.com/rclone/rclone/lib/atexit"
)
// Notify systemd that the service is starting. This returns a
// function which should be called to notify that the service is
// stopping. This function will be called on exit if the service exits
// on a signal.
func Notify() func() {
if err := sysdnotify.Ready(); err != nil {
log.Printf("failed to notify ready to systemd: %v", err)
}
var finaliseOnce sync.Once
finalise := func() {
finaliseOnce.Do(func() {
if err := sysdnotify.Stopping(); err != nil {
log.Printf("failed to notify stopping to systemd: %v", err)
}
})
}
finaliseHandle := atexit.Register(finalise)
return func() {
atexit.Unregister(finaliseHandle)
finalise()
}
}
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