1 files changed, 43 insertions, 0 deletions
diff --git a/xlockkbd.c b/xlockkbd.c
new file mode 100644
index 0000000..fd9e659
--- /dev/null
+++ b/xlockkbd.c
@@ -0,0 +1,43 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+
+static void die(const char *s)
+{
+	fprintf(stderr, "xlockkbd: %s\n", s);
+	exit(1);
+}
+
+static bool grab_kbd(Display *d, int screen)
+{
+	return (XGrabKeyboard(d, RootWindow(d, screen), True, GrabModeAsync,
+			GrabModeAsync, CurrentTime)
+		== GrabSuccess);
+}
+
+static void wait_for_key(Display *d)
+{
+	XEvent ev;
+	while (!XNextEvent(d, &ev)) {
+		if (ev.type == KeyPress &&
+				XLookupKeysym(&ev.xkey, 0) == XK_Escape)
+			break;
+	}
+}
+
+int main()
+{
+	Display *d = XOpenDisplay(NULL);
+	if (!d)
+		die("cannot open display");
+
+	for (int i = 0; i < ScreenCount(d); ++i) {
+		if (!grab_kbd(d, i))
+			die("failed to grab keyboard");
+	}
+
+	wait_for_key(d);
+	return 0;
+}