From fa4761a9e437e896719246a8840b8856a48a199c Mon Sep 17 00:00:00 2001
From: Alan Pearce
Date: Tue, 2 Jul 2024 11:47:57 +0200
Subject: extract listenfd library

---
 internal/listenfd/listenfd.go | 67 -------------------------------------------
 1 file changed, 67 deletions(-)
 delete mode 100644 internal/listenfd/listenfd.go

(limited to 'internal/listenfd')

diff --git a/internal/listenfd/listenfd.go b/internal/listenfd/listenfd.go
deleted file mode 100644
index 5287898..0000000
--- a/internal/listenfd/listenfd.go
+++ /dev/null
@@ -1,67 +0,0 @@
-package listenfd
-
-import (
-	"crypto/tls"
-	"net"
-	"os"
-	"strconv"
-
-	"go.alanpearce.eu/x/log"
-
-	"gitlab.com/tozd/go/errors"
-)
-
-const fdStart = 3
-
-func GetListener(i uint64, addr string, log *log.Logger) (l net.Listener, err error) {
-	l, err = getFDSocket(i)
-	if err != nil {
-		log.Warn("could not create listener from listenfd", "error", err)
-	}
-
-	log.Debug("listener from listenfd?", "passed", l != nil)
-	if l == nil {
-		l, err = net.Listen("tcp", addr)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not create listener")
-		}
-	}
-
-	return
-}
-
-func GetListenerTLS(
-	i uint64,
-	addr string,
-	config *tls.Config,
-	log *log.Logger,
-) (l net.Listener, err error) {
-	l, err = GetListener(i, addr, log)
-	if err != nil {
-		return nil, err
-	}
-
-	return tls.NewListener(l, config), nil
-}
-
-func getFDSocket(i uint64) (net.Listener, error) {
-	lfds, present := os.LookupEnv("LISTEN_FDS")
-	if !present {
-		return nil, nil
-	}
-
-	fds, err := strconv.ParseUint(lfds, 10, 32)
-	if err != nil {
-		return nil, errors.Wrap(err, "could not parse LISTEN_FDS")
-	}
-	if i >= fds {
-		return nil, errors.Errorf("only %d fds available, requested index %d", fds, i)
-	}
-
-	l, err := net.FileListener(os.NewFile(uintptr(i+fdStart), ""))
-	if err != nil {
-		return nil, errors.Wrap(err, "could not create listener")
-	}
-
-	return l, nil
-}
-- 
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