From 0511041756fa6f3b53bef3d197d43e88e42697d8 Mon Sep 17 00:00:00 2001
From: Julian T <julian@jtle.dk>
Date: Sun, 9 Oct 2022 11:50:12 +0200
Subject: Add interception tool config

---
 intcp/intcp/main.c       | 27 +++++++++++++++++++++++++++
 intcp/intcp/udevmon.yaml |  4 ++++
 2 files changed, 31 insertions(+)
 create mode 100644 intcp/intcp/main.c
 create mode 100644 intcp/intcp/udevmon.yaml

diff --git a/intcp/intcp/main.c b/intcp/intcp/main.c
new file mode 100644
index 0000000..383ef5b
--- /dev/null
+++ b/intcp/intcp/main.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <linux/input.h>
+
+int main(void) {
+    setbuf(stdin, NULL); setbuf(stdout, NULL);
+
+    struct input_event event;
+    while (fread(&event, sizeof(event), 1, stdin)) {
+        if (event.type == EV_KEY) {
+            switch (event.code) {
+                case KEY_CAPSLOCK:
+                    event.code = KEY_LEFTCTRL;
+                    break;
+                case KEY_LEFTALT:
+                    event.code = KEY_LEFTMETA;
+                    break;
+                case KEY_102ND:
+                    event.code = KEY_LEFTALT;
+                    break;
+            }
+        }
+
+        fwrite(&event, sizeof(event), 1, stdout);
+    }
+}
+
diff --git a/intcp/intcp/udevmon.yaml b/intcp/intcp/udevmon.yaml
new file mode 100644
index 0000000..3733456
--- /dev/null
+++ b/intcp/intcp/udevmon.yaml
@@ -0,0 +1,4 @@
+- JOB: "intercept -g $DEVNODE | /home/julian/intcp/intcp | uinput -d $DEVNODE"
+  DEVICE:
+    EVENTS:
+      EV_KEY: [ KEY_CAPSLOCK, KEY_LEFTALT, KEY_102ND ]
-- 
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