## tidy loose ends...
set -e
# fix mark auto-installed packages as such
# tracked at https://bugs.debian.org/730162, https://bugs.debian.org/739938
chroot /target apt-mark auto $(chroot /target apt-mark showmanual | grep '^lib') acpi acpi-support-base acpid adduser apt apt-utils aptitude-common base-files base-passwd bash bash-completion bsdmainutils bsdutils busybox coreutils cpio cron dash debconf debconf-i18n debian-archive-keyring debianutils diffutils dmidecode dpkg e2fslibs e2fsprogs findutils fonts-freefont-ttf gcc-4.7-base gnupg gpgv grep groff-base grub-common gzip hostname ifupdown initramfs-tools initscripts insserv install-info iproute isc-dhcp-client isc-dhcp-common keyboard-configuration kmod laptop-detect linux-image-amd64 locales login logrotate lsb-base mawk mount multiarch-support ncurses-base ncurses-bin net-tools netbase netcat-traditional passwd pciutils perl-base procps readline-common rsyslog sed sensible-utils sysv-rc sysvinit sysvinit-utils tar tasksel tasksel-data tzdata udev usbutils util-linux uuid-runtime vim-common xz-utils zlib1g
# keep backup of any tweaked (i.e. edited or created) config file
_backup(){ set -e
	[ -e "$1.orig" ] || if [ -e "$1" ]; then cp -a "$1" "$1.orig"
	else touch "$1.orig"
	fi; }
_clone(){ set -e
	_backup "$2"
	cp -a "$1" "$2"; }
_setvar(){ set -e
	_backup "$1"
	sed -i -r -e "s,^#?($2)=.*,\\1=$3," "$1"; }

## non-technical operation
# auto-repair inconsistent filesystems during boot
_setvar /target/etc/default/rcS FSCKFIX yes