43 lines
798 B
Go
43 lines
798 B
Go
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package systemd
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import (
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"errors"
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"net"
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"os"
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)
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const (
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// magic values for systemd
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// from https://www.freedesktop.org/software/systemd/man/sd_notify.html#Description
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Ready = "READY=1"
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Reloading = "RELOADING=1"
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Stopping = "STOPPING=1"
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)
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var NotifyNoSocket = errors.New("No socket")
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// Notifier provides a method to send a message to systemd.
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type Notifier struct{}
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// Notify sends a message to the init daemon. It is common to ignore the error.
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func (n *Notifier) Notify(state string) error {
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addr := &net.UnixAddr{
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Name: os.Getenv("NOTIFY_SOCKET"),
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Net: "unixgram",
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}
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if addr.Name == "" {
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return NotifyNoSocket
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}
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conn, err := net.DialUnix(addr.Net, nil, addr)
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if err != nil {
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return err
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}
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defer conn.Close()
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_, err = conn.Write([]byte(state))
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return err
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}
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