Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 31 insertions, 0 deletions

diff --git a/src/cmd/go/internal/base/signal.go b/src/cmd/go/internal/base/signal.go
new file mode 100644
index 0000000..05befcf
--- /dev/null
+++ b/src/cmd/go/internal/base/signal.go
@@ -0,0 +1,31 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package base
+
+import (
+	"os"
+	"os/signal"
+	"sync"
+)
+
+// Interrupted is closed when the go command receives an interrupt signal.
+var Interrupted = make(chan struct{})
+
+// processSignals setups signal handler.
+func processSignals() {
+	sig := make(chan os.Signal, 1)
+	signal.Notify(sig, signalsToIgnore...)
+	go func() {
+		<-sig
+		close(Interrupted)
+	}()
+}
+
+var onceProcessSignals sync.Once
+
+// StartSigHandlers starts the signal handlers.
+func StartSigHandlers() {
+	onceProcessSignals.Do(processSignals)
+}