1 files changed, 31 insertions, 0 deletions
diff --git a/bin/quick-shutdown b/bin/quick-shutdown
new file mode 100755
index 0000000..f5a5259
--- /dev/null
+++ b/bin/quick-shutdown
@@ -0,0 +1,31 @@
+#!/bin/sh
+
+set -e
+
+# This assumes that /proc/cmdline contains a cryptdevice with a UUID identifier,
+# like:
+#
+# cryptdevice=UUID=1ff1d6f7-7540-4500-8011-1abe1e9ac00d:cryptroot
+uuid=$(cat /proc/cmdline | \
+    tr ' ' '\n' | \
+    grep cryptdevice | \
+    cut -d= -f3 | \
+    cut -d: -f1)
+
+device=$(lsblk -o PATH,UUID | grep "$uuid" | awk '{print $1}')
+echo "Root device is $device"
+
+echo -n "Enter root key: "
+read -s pw
+echo ""
+
+# This will check if the key is right, and cause the process to exit if not due
+# to the "set -e"
+echo "Checking key..."
+echo "$pw" | sudo cryptsetup open --test-passphrase "$device"
+
+echo "Good job, writing /boot/keyfile..."
+echo -n "$pw" | sudo tee /boot/keyfile >/dev/null
+
+echo "Shutting down..."
+sudo systemctl poweroff