unkinben
02e3e0315d
RFC2136 dynamic-DNS updater. Watches a records file (inotify) and new interface addresses and pushes TSIG-signed updates to BIND per zone, sending only the delta. Native miekg/dns (structured per-zone RCODEs), local status API + facter fact, systemd unit, nfpm RPM, Woodpecker CI. Replaces the puppet dns-update shell script; keeps the same records-file and TSIG-key contract.
28 lines
644 B
Go
28 lines
644 B
Go
package config
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import (
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"net"
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"os"
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)
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// SdNotify sends a state string to systemd via NOTIFY_SOCKET (Type=notify). It
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// is a no-op when not run under systemd. Implemented inline to avoid a
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// dependency for a few lines of socket writing.
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func SdNotify(state string) {
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sock := os.Getenv("NOTIFY_SOCKET")
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if sock == "" {
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return
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}
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addr := &net.UnixAddr{Name: sock, Net: "unixgram"}
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// Abstract namespace sockets start with '@'.
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if len(sock) > 0 && sock[0] == '@' {
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addr.Name = "\x00" + sock[1:]
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}
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conn, err := net.DialUnix("unixgram", nil, addr)
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if err != nil {
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return
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}
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defer conn.Close()
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_, _ = conn.Write([]byte(state))
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}
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