From ac015d36e4ec4dafe9a0f481ed0fb8c6d6ee3f84 Mon Sep 17 00:00:00 2001
From: Nathan Reiner <nathan@nathanreiner.xyz>
Date: Mon, 27 Mar 2023 21:28:17 +0200
Subject: create keyusb

---
 Makefile         |  7 +++++++
 config.mk        |  1 +
 keyusbctl        | 20 ++++++++++++++++++++
 usb-unplug.rules |  1 +
 4 files changed, 29 insertions(+)
 create mode 100644 Makefile
 create mode 100644 config.mk
 create mode 100644 keyusbctl
 create mode 100644 usb-unplug.rules

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e701613
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,7 @@
+include config.mk
+
+install:
+	sed ./keyusbctl -e "s/\[USB_UUID\]/${USB_UUID}/g" > /usr/local/sbin/keyusbctl
+	cp ./usb-unplug.rules /etc/udev/rules.d/
+	chmod +x /usr/local/sbin/keyusbctl
+	@echo type 'udevadm control --reload' to reload the udev rules
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..8387d6d
--- /dev/null
+++ b/config.mk
@@ -0,0 +1 @@
+USB_UUID=YOUR_UUID_HERE
diff --git a/keyusbctl b/keyusbctl
new file mode 100644
index 0000000..1798000
--- /dev/null
+++ b/keyusbctl
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+is_key_plugged_in() {
+	lsblk --raw -o UUID | grep [USB_UUID]
+}
+
+toggle_lock() {
+	if [ -e "/tmp/.keyusb_lock" ]; then
+		rm /tmp/.keyusb_lock
+	else
+		touch /tmp/.keyusb_lock
+	fi
+}
+
+case "$1" in
+	-e)
+		[ -e "/tmp/.keyusb_lock" ] && exit
+		is_key_plugged_in || poweroff;;
+	-t) toggle_lock;;
+esac
diff --git a/usb-unplug.rules b/usb-unplug.rules
new file mode 100644
index 0000000..ab4759f
--- /dev/null
+++ b/usb-unplug.rules
@@ -0,0 +1 @@
+ACTION=="remove", SUBSYSTEM=="usb", RUN+="/usr/local/sbin/keyusbctl -e"
-- 
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