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1 files changed, 22 insertions, 0 deletions

diff --git a/examples/small_demos/key.stp b/examples/small_demos/key.stp
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index 00000000..0489524a
--- /dev/null
+++ b/examples/small_demos/key.stp
@@ -0,0 +1,22 @@
+#! /usr/bin/env stap
+
+# Useless, but amusing. Based on an idea I saw on a
+# dtrace site. (wav files are from emacs).
+
+// KEY_ENTER = 28
+probe kernel.function("kbd_event") {
+	if ($event_type == 1 && $value) {
+		if ($event_code == 28)
+			system("play return.wav")
+		else
+			system("play click.wav")
+	}
+}
+
+probe begin {
+	printf("TYPEWRITER ON\n")
+}
+
+probe end {
+	printf("DONE\n")
+}