From 69c1c6866140b0659ecb2bb9f21a82d6a5060b51 Mon Sep 17 00:00:00 2001
From: Gardouille <gardouille@gmail.com>
Date: Wed, 21 Oct 2020 15:04:20 +0200
Subject: [PATCH] Add script to umount chroot related devices

---
 debian/chroot.umount | 88 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100755 debian/chroot.umount

diff --git a/debian/chroot.umount b/debian/chroot.umount
new file mode 100755
index 0000000..5bd38d8
--- /dev/null
+++ b/debian/chroot.umount
@@ -0,0 +1,88 @@
+#!/bin/sh
+
+# Vars {{{
+[ -z "${DEBUG}" ] && readonly DEBUG=0
+## Export DEBUG for sub-script
+export DEBUG
+
+## Define the hard drive to use
+if [ -b '/dev/sda' ]; then
+	hdd="/dev/sda"
+else
+	printf '%b\n' "Please check the hard drive to use"
+	exit 0
+fi
+
+## Try to guess the VG name by using the last VG detected
+vgname=$(vgdisplay --short | tail -n 1 | sed 's/.*"\(.*\)" .*/\1/')
+# }}}
+
+debug_message() {                                               # {{{
+
+	local_message="${1}"
+
+	## Print message if DEBUG is enable (=0)
+	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME}: ${local_message}"
+
+	return 0
+}
+# }}}
+
+# Umount filesystems {{{
+
+mountpoint -q /target/boot       && umount -- /target/boot
+
+mountpoint -q /target/home       && umount -- /target/home
+mountpoint -q /target/opt        && umount -- /target/opt
+mountpoint -q /target/srv        && umount -- /target/srv
+mountpoint -q /target/tmp        && umount -- /target/tmp
+mountpoint -q /target/usr        && umount -- /target/usr
+mountpoint -q /target/var        && umount -- /target/var
+
+mountpoint -q /target/srv/backup && umount -- /target/srv/backup
+mountpoint -q /target/var/lib/vz && umount -- /target/var/lib/vz
+
+swapoff /dev/mapper/"${vgname}"-swap > /dev/null 2>&1
+
+mountpoint -q /target/dev        && umount /target/dev
+mountpoint -q /target/dev/pts    && umount /target/dev/pts
+mountpoint -q /target/proc       && umount /target/proc
+mountpoint -q /target/sys        && umount /target/sys
+mountpoint -q /target/run/lvm    && umount /target/run/lvm
+mountpoint -q /target/run/udev   && umount /target/run/udev
+
+mountpoint -q /target            && umount -- /target
+# }}}
+
+## Disable LVM {{{
+### Disable LVM devices
+vgchange --activate n --quiet > /dev/null
+
+## }}}
+## Is LUKS {{{
+if blkid | grep -q -- "${hdd}.*crypto_LUKS"; then
+	debug_message "is_luks − \
+Luks seems available on ${hdd} device."
+	manage_luks=0
+
+	luks_pv_name=$(basename "${hdd}"2_crypt)
+else
+	manage_luks=1
+	debug_message "is_luks − \
+No Luks system on ${hdd} device."
+fi
+
+## }}}
+## Close LUKS device {{{
+if [ "${manage_luks}" -eq 0 ]; then
+	### If the volume is opened
+	if [ -h /dev/mapper/"${luks_pv_name}" ]; then
+		debug_message "close_luks − \
+Try to close Luks on ${luks_pv_name} − ${hdd}2"
+		### Close LUKS device
+		cryptsetup luksClose "${luks_pv_name}" || exit 2
+	fi
+fi
+## }}}
+
+exit 0