commit a5d5a0917e3d9f3d9582ba18af112cde15a8cfca
Author: David Voznyarskiy <davidv@no-reply@disroot.org>
Date: Sat Feb 7 00:31:58 2026 -0800
script to help with unmounting encrypted devices
diff --git a/unmounter b/unmounter
index e69de29..d2bf609 100644
--- a/unmounter
+++ b/unmounter
@@ -0,0 +1,57 @@
+#!/bin/sh
+
+set -e
+
+sudo -v || exit 1
+
+mapped_devices=""
+for path in /dev/mapper/usb*; do
+ [ -e "$path" ] || continue
+ mapped_devices="$mapped_devices $(basename "$path")"
+done
+
+set -- $mapped_devices
+
+[ "$#" -eq 0 ] && exit 1
+
+echo "Devices Found"
+i=1
+for dev in "$@"; do
+ echo "[$i] /dev/mapper/$dev"
+ i=$((i + 1))
+done
+
+if [ $i -eq 2 ]; then
+ index=1
+else
+ printf "select a device to unmount [1-%d]: " $(( $# ))
+ read index
+
+ case "$index" in
+ ''|*[!1-9]*)
+ exit 1
+ ;;
+ esac
+
+ if [ "$index" -lt 1 ] || [ "$index" -ge "$#" ]; then
+ exit 1
+ fi
+fi
+
+i=1
+for dev in "$@"; do
+ [ "$i" -eq "$index" ] && name="$dev" && break
+ i=$((i + 1))
+done
+
+mount_point="/mnt/$name"
+
+if mountpoint -q "$mount_point" 2>/dev/null; then
+ echo "umounting $mount_point"
+ sudo umount "$mount_point"
+fi
+
+echo "cryptsetup closing $name"
+sudo cryptsetup close "$name"
+
+echo "/dev/mapper/$name unmounted successfully"
