X-Git-Url: https://iankelling.org/git/?p=automated-distro-installer;a=blobdiff_plain;f=fsf%2Fclose-crypt-luks-keys-loopback;fp=fsf%2Fclose-crypt-luks-keys-loopback;h=6b0f80d89d6495c843f6a5fe369bc3b18433aa01;hp=0000000000000000000000000000000000000000;hb=137ffae7de84a51c4b438ccf2fb50f5571f522a6;hpb=14f283f82afc48d6cec1bb7498ec34ac2b0da77c

diff --git a/fsf/close-crypt-luks-keys-loopback b/fsf/close-crypt-luks-keys-loopback
new file mode 100755
index 0000000..6b0f80d
--- /dev/null
+++ b/fsf/close-crypt-luks-keys-loopback
@@ -0,0 +1,30 @@
+#!/bin/bash
+
+# usage: $0
+# this script is idempotent
+
+# warning: changes here may affect the open version of this script
+
+if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
+shopt -s inherit_errexit 2>/dev/null ||: # ignore fail in bash < 4.4
+set -eE -o pipefail
+trap 'echo "$0:$LINENO:error: \"$BASH_COMMAND\" exit status: $?, PIPESTATUS: ${PIPESTATUS[*]}" >&2' ERR
+
+m() { printf "%s\n" "$*";  "$@"; }
+
+
+fs_file=/root/crypt-luks-keys-loopback
+mapper_name=crypt-luks-keys-loopback
+
+if mountpoint /mnt2 &>/dev/null; then
+  m umount /mnt2
+fi
+if cryptsetup status /dev/mapper/$mapper_name &>/dev/null; then
+  m cryptsetup luksClose /dev/mapper/$mapper_name; then
+fi
+l=$(losetup -l --noheadings | awk '$6 ~ /\/'$mapper_name'$/ {print $1}')
+if [[ $l ]]; then
+  m losetup -d $l
+else
+  echo "$0: warning: no loopback device found" >&2
+fi