#! /bin/sh
set -e

. /usr/share/debconf/confmodule

if [ "$1" ]; then
	export LANG=C # avoid locale errors from perl
	ROOT="$1"
	chroot=chroot
	log='log-output -t user-setup'
else
	ROOT=
	chroot=
	log=
fi

. /usr/lib/user-setup/functions.sh

# Set a password, via chpasswd.
# Use a heredoc rather than echo, to avoid the password
# showing in the process table. (However, this is normally
# only called when first installing the system, when root has no
# password at all, so that should be an unnecessary precaution).
#
# Pass in three arguments: the user, the password, and 'true' if the
# password has been pre-crypted (by preseeding).
setpassword () {
	local USER PASSWD
	USER="$1"
	PASSWD="$2"

	local VERSION=$($chroot $ROOT dpkg-query -W -f '${Version}\n' passwd)
	if $chroot $ROOT dpkg --compare-versions "$VERSION" ge "1:4.1.4-1"; then
		# support for versions with PAM support (Squeeze)
		if [ "$3" = true ]; then
			$chroot $ROOT usermod --password=$PASSWD $USER
		else
			$chroot $ROOT chpasswd <<EOF
$USER:$PASSWD
EOF
		fi
	else
		# compatibility support for versions without PAM support (Lenny)
		local OPTS
		if [ "$3" = true ]; then
			OPTS=-e
		else
			OPTS=-m
		fi
		$chroot $ROOT chpasswd $OPTS <<EOF
$USER:$PASSWD
EOF
	fi
}

$log $chroot $ROOT shadowconfig on

if ! root_password; then
	# Was the root password preseeded encrypted?
	if db_get passwd/root-password-crypted && [ "$RET" ]; then
		# The root password was preseeded encrypted.
		ROOT_PW="$RET"
		PRECRYPTED=true
	else
		db_get passwd/root-password
		ROOT_PW="$RET"
		PRECRYPTED=false
	fi
	# Clear the root password from the database, and set the password.
	db_set passwd/root-password-crypted ''
	db_set passwd/root-password ''
	db_set passwd/root-password-again ''
	if [ "$ROOT_PW" ]; then
		setpassword root "$ROOT_PW" "$PRECRYPTED"
	fi
	ROOT_PW=
else
	# Just in case, clear any preseeded root password from the database
	# anyway.
	db_set passwd/root-password-crypted ''
	db_set passwd/root-password ''
	db_set passwd/root-password-again ''
fi

db_get passwd/make-user
if [ "$RET" = true ] && ! is_system_user; then
	if db_get passwd/user-password-crypted && [ "$RET" ]; then
		USER_PW="$RET"
		USER_PW_CRYPTED=true
	else
		db_get passwd/user-password
		USER_PW="$RET"
		USER_PW_CRYPTED=false
	fi

	if db_get passwd/user-uid && [ "$RET" ]; then
		if [ -x $ROOT/usr/sbin/adduser ]; then
			UIDOPT="--uid $RET"
		else
			UIDOPT="-u $RET"
		fi
	else
		UIDOPT=
	fi

	# Add the user to the database, using adduser in noninteractive
	# mode.
	db_get passwd/username
	USER="$RET"
	db_get passwd/user-fullname

	HOME_EXISTED=
	if [ -d "$ROOT/home/$USER" ]; then
		HOME_EXISTED=1
	fi

	if [ -x $ROOT/usr/sbin/adduser ]; then
		$log $chroot $ROOT adduser --disabled-password --gecos "$RET" $UIDOPT "$USER" >/dev/null || true
	else
		$log $chroot $ROOT useradd -c "$RET" -m "$USER" $UIDOPT >/dev/null || true
	fi

	# Clear the user password from the database.
	db_set passwd/user-password-crypted ''
	db_set passwd/user-password ''
	db_set passwd/user-password-again ''
	setpassword "$USER" "$USER_PW" "$USER_PW_CRYPTED"

	if [ "$HOME_EXISTED" ]; then
		# The user's home directory already existed before we called
		# adduser. This often means that a mount point under
		# /home/$USER was selected in (and thus created by) partman,
		# and the home directory may have ended up owned by root.
		$log $chroot $ROOT chown "$USER:$USER" "/home/$USER" >/dev/null || true
	fi

	if [ -n "$USER" ]; then
		db_get passwd/user-default-groups
		for group in $RET; do
			$log $chroot $ROOT adduser "$USER" $group >/dev/null 2>&1 || true
		done
	fi

	db_get passwd/root-login
	if [ "$RET" = false ] && [ -n "$USER" ]; then
		# Ensure sudo is installed, and set up the user to be able
		# to use it.
		if [ ! -e $ROOT/etc/sudoers ]; then
			# try to work in d-i and out; it's better to
			# use apt-install in d-i
			apt-install sudo 2>/dev/null || $log $chroot $ROOT apt-get -q -y install sudo || true
		fi
		if [ -e $ROOT/etc/sudoers ]; then
			# Test if we can add the user to the sudo group
			# (possible if sudo >= 1.7.2-2 is installed on the target system)
			# If we can, do it this way, otherwise add the user to sudoers
			# See #597239
			if ! $log $chroot $ROOT adduser "$USER" sudo >/dev/null 2>&1; then
				echo "$USER ALL=(ALL) ALL" >> $ROOT/etc/sudoers
			fi
		else
			# sudo failed to install, system won't be usable
			exit 1
		fi
		# Configure gksu to use sudo, via an alternative, if it's
		# installed and the alternative is registered.
		if $chroot $ROOT update-alternatives --display libgksu-gconf-defaults >/dev/null 2>&1; then
			$log $chroot $ROOT update-alternatives --set libgksu-gconf-defaults /usr/share/libgksu/debian/gconf-defaults.libgksu-sudo
			$log $chroot $ROOT update-gconf-defaults || true
		fi
		# Configure aptitude to use sudo.
		echo 'Aptitude::Get-Root-Command "sudo:/usr/bin/sudo";' > $ROOT/etc/apt/apt.conf.d/00aptitude
	fi
else
	# Just in case, clear any preseeded user password from the database
	# anyway.
	db_set passwd/user-password-crypted ''
	db_set passwd/user-password ''
	db_set passwd/user-password-again ''
fi

exit 0