cmd: add option to get and set policy directly from database (#2765)

hscontrol/util/prompt.go

@@ -0,0 +1,24 @@
+package util
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+// YesNo takes a question and prompts the user to answer the
+// question with a yes or no. It appends a [y/n] to the message.
+// The question is written to stderr so that content can be redirected
+// without interfering with the prompt.
+func YesNo(msg string) bool {
+	fmt.Fprint(os.Stderr, msg+" [y/n] ")
+
+	var resp string
+	fmt.Scanln(&resp)
+	resp = strings.ToLower(resp)
+	switch resp {
+	case "y", "yes", "sure":
+		return true
+	}
+	return false
+}