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package systemd
import (
"fmt"
"sync"
"github.com/coreos/go-systemd/v22/daemon"
"github.com/rclone/rclone/fs"
"github.com/rclone/rclone/lib/atexit"
)
// Notify systemd that the service is ready. 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.
// NOTE: this function should only be called once, and so it
// should generally only be used directly in a command's Run handler.
// It should not be called as a result of rc commands. See #7540.
func Notify() func() {
if _, err := daemon.SdNotify(false, daemon.SdNotifyReady); err != nil {
fs.Logf(nil, "failed to notify ready to systemd: %v", err)
}
var finaliseOnce sync.Once
finalise := func() {
finaliseOnce.Do(func() {
if _, err := daemon.SdNotify(false, daemon.SdNotifyStopping); err != nil {
fs.Logf(nil, "failed to notify stopping to systemd: %v", err)
}
})
}
finaliseHandle := atexit.Register(finalise)
return func() {
atexit.Unregister(finaliseHandle)
finalise()
}
}
// UpdateStatus updates the systemd status
func UpdateStatus(status string) error {
systemdStatus := fmt.Sprintf("STATUS=%s", status)
_, err := daemon.SdNotify(false, systemdStatus)
return err
}
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