lib/mage/mage4.functions.sh

#!/bin/bash
# Magellan Linux Installer Functions (mage.functions.sh)
# $Header: /home/cvsd/magellan-cvs/magellan-src/mage/usr/lib/mage/mage4.functions.sh,v 1.16 2006-02-16 22:11:06 niro Exp $

mage_setup()
{
	[ ! -d ${MROOT}${INSTALLDB} ] && \
		install -d ${MROOT}${INSTALLDB}
	[ ! -f ${MROOT}${VIRTUALDB_FILE} ] && \
		touch ${MROOT}${VIRTUALDB_FILE}
	[ ! -d ${PKGDIR} ] && install -d ${PKGDIR}
	[ ! -d ${BUILDDIR} ] && install -d ${BUILDDIR}
	[ ! -d ${MAGEDIR} ] && install -d ${MAGEDIR}

	return 0
}

unpack_packages()
{
	local list="$@"
	local magefile
	local pkg
	local pkgtype
	local count_current
	local count_total

	# get count of total packages
	declare -i count_current=0
	declare -i count_total=0

	for i in ${list}; do (( count_total++ )); done

	for magefile in ${list}
	do
		pkg="$(get_value_from_magefile PKGNAME ${magefile}).${PKGSUFFIX}"
		pkgtype="$(get_value_from_magefile PKGTYPE ${magefile})"

		(( count_current++ ))
		xtitle "[ (${count_current}/${count_total}) Unpacking ${pkg} ]"

		# abort on virtual pkg
		if [[ ${pkgtype} = virtual ]]
		then
			echo -ne " ${COLBLUE}---${COLDEFAULT}"
			echo " !unpack virtual (${count_current}/${count_total}): ${pkg/.${PKGSUFFIX}/} ... "
			continue
		fi

		# abort on sources pkg
		if [[ ${pkgtype} = sources ]]
		then
			echo -ne " ${COLBLUE}---${COLDEFAULT}"
			echo " !unpack sources (${count_current}/${count_total}): ${pkg/.${PKGSUFFIX}/} ... "
			continue
		fi

		echo -e " ${COLBLUE}***${COLDEFAULT} unpacking (${count_current}/${count_total}): ${pkg} ... "
		tar xjmf ${PKGDIR}/${pkg} -C ${BUILDDIR} || die "Unpacking package ${pkg}"
	done

	# add a crlf for a better view
	if [ ${count_total} -gt 1 ]; then echo; fi
}


# fix_mtime path/to/$mtime/reffile $pathto/file
# creates a given reference file and fixes given file
# returns new mtime
fix_mtime()
{
	local reference="$1"
	local pathto="$2"
	local mtime

	mtime=$(stat -c %Y "${reference}")
	touch \
		--no-create \
		--time=mtime \
		--reference "${reference}" \
		"${pathto}"

	echo "${mtime}"
}

# fix_descriptor pkgname/.dir "foo1" "foo2"
fix_descriptor()
{
	local descriptor="$1"
	local output
	local i
	shift

	for i in $@
	do
		if [[ -z ${output} ]]
		then
			output="${i}"
		else
			output="${output}§${i}"
		fi
	done

	echo "${output}" >> ${BUILDDIR}/${descriptor}_fixed
}

###################################################
# function install_direcories                     #
#	install_direcories $PKGNAME               #
###################################################
install_directories()
{
	local pkgname="$1"
	local pathto
	local posix
	local user
	local group
	local IFS

	# sanity checks; abort if not given
	[ -z "${pkgname}" ] && die "install_directories() \$pkgname not given."

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "install_directories() \$BUILDDIR not set."

	[ ! -f ${BUILDDIR}/${pkgname}/.dirs ] && die "install_directories() .dirs not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix user group
	do
		[ -z "${pathto}" ] && continue
		[[ ${VERBOSE} = on ]] && echo -e "\t>>> DIR:  ${MROOT}${pathto}"


		# monitors /etc/env.d -> env-rebuild
		[[ ${pathto} = /etc/env.d ]] && export MAGE_ENV_REBUILD=true

		# monitors /usr/share/info -> info-rebuild
		[[ ${pathto} = /usr/share/info ]] && export MAGE_INFO_REBUILD=true

		install -m "${posix}" -o "${user}" -g "${group}" -d "${MROOT}${pathto}"
	done < ${BUILDDIR}/${pkgname}/.dirs

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function install_files                          #
#	install_files $PKGNAME                    #
###################################################
install_files()
{

	local pkgname="$1"
	local pathto
	local posix
	local user
	local group
	local mtime
	local md5sum

	local retval
	local counter
	local filename
	local dest_dirname
	local dest_protected
	local IFS

	# sanity checks; abort if not given
	[ -z "${pkgname}" ] && die "install_files() \$pkgname not given."

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "install_files() \$BUILDDIR not set."

	[ ! -f ${BUILDDIR}/${pkgname}/.files ] && die "install_files() .files not found"

	# delete old files
	[ -f ${BUILDDIR}/${pkgname}/.files_fixed ] && rm ${BUILDDIR}/${pkgname}/.files_fixed

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix user group mtime md5sum
	do
		[ -z "${pathto}" ] && continue

		# final destination dir of file ${pathto}
		dest_dirname="$(dirname "${MROOT}${pathto}")"

		### small hotfix fix ###
		[ ! -d "${dest_dirname}" ] && install -d "${dest_dirname}"

		# check if the file is config_protected
		# ${MROOT} will automatically added if set !!
		is_config_protected "${pathto}"
		retval="$?"

		# 0 - not protected        #
		# 1 - error                #
		# 2 - protected            #
		# 3 - protected but masked #

		case ${retval} in
			# file is not protected - (over)write it
			0|3)
				[[ ${VERBOSE} = on ]] && echo -e "\t>>> FILE: ${MROOT}${pathto}"
				install -m "${posix}" -o "${user}" -g "${group}" \
					${BUILDDIR}/${pkgname}/binfiles/"${pathto}" \
					"${MROOT}${pathto}"

				# fix mtime and db
				fix_descriptor ${pkgname}/.files \
					"${pathto}" \
					"${posix}" \
					"${user}" \
					"${group}" \
					"$(fix_mtime "${BUILDDIR}/${pkgname}"/.mtime \
						"${MROOT}${pathto}")" \
					"${md5sum}"
				;;

			# file is protected, write backup file
			2)
				if [[ ${VERBOSE} = on ]]
				then
					echo -en "${COLRED}"
					echo -n "! prot "
					echo -en "${COLDEFAULT}"
					echo " === FILE: ${MROOT}${pathto}"
				fi
				filename="$(basename "${pathto}")"
				counter=$(count_protected_files "${pathto}")
				dest_protected="${dest_dirname}/._cfg${counter}_${filename}"
				install -m "${posix}" -o "${user}" -g "${group}" \
					${BUILDDIR}/${pkgname}/binfiles/"${pathto}" \
					"${dest_protected}"

				# fix mtime and db
				fix_descriptor ${pkgname}/.files \
					"${pathto}" \
					"${posix}" \
					"${user}" \
					"${group}" \
					"$(fix_mtime "${BUILDDIR}/${pkgname}"/.mtime \
						"${dest_protected}")" \
					"${md5sum}"

				# update global MAGE_PROTECT_COUNTER
				(( MAGE_PROTECT_COUNTER++ ))
				export MAGE_PROTECT_COUNTER
				;;
		esac
	done < ${BUILDDIR}/${pkgname}/.files

	# now copy the fixed file over the old one
	[ -f ${BUILDDIR}/${pkgname}/.files_fixed ] && \
		cp ${BUILDDIR}/${pkgname}/.files{_fixed,}

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function install_symlinks                       #
#	install_symlinks $PKGNAME                 #
###################################################
install_symlinks()
{
	local pkgname="$1"
	local pathto
	local posix
	local link
	local mtime
	local IFS

	# sanity checks; abort if not given
	[ -z "${pkgname}" ] && die "install_symlinks() \$pkgname not given."

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "install_symlinks() \$BUILDDIR not set."

	[ ! -f ${BUILDDIR}/${pkgname}/.symlinks ] && die "install_symlinks() .symlinks not found"

	# delete old files
	[ -f ${BUILDDIR}/${pkgname}/.symlinks_fixed ] && rm ${BUILDDIR}/${pkgname}/.symlinks_fixed

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix link mtime
	do
		[ -z "${pathto}" ] && continue
		[[ ${VERBOSE} = on ]] && echo -e "\t>>> LINK: ${MROOT}${pathto}"

		ln -snf "${link}" "${MROOT}${pathto}"

		# fix mtime and db
		fix_descriptor ${pkgname}/.symlinks \
			"${pathto}" \
			"${posix}" \
			"${link}" \
			"$(fix_mtime "${BUILDDIR}/${pkgname}"/.mtime \
				"${MROOT}${pathto}")"

	done < ${BUILDDIR}/${pkgname}/.symlinks

	# now copy the fixed file over the old one
	[ -f ${BUILDDIR}/${pkgname}/.symlinks_fixed ] && \
		cp -f ${BUILDDIR}/${pkgname}/.symlinks{_fixed,}

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function install_blockdevices                   #
#	install_blockdevices $PKGNAME             #
###################################################
install_blockdevices()
{
	local pkgname="$1"
	local pathto
	local posix
	local IFS

	# sanity checks; abort if not given
	[ -z "${pkgname}" ] && die "install_blockdevices() \$pkgname not given."

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "install_blockdevices() \$BUILDDIR not set."

	[ ! -f ${BUILDDIR}/${pkgname}/.pipes ] && die "install_blockdevices() .pipes not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix
	do
		[ -z "${pathto}" ] && continue
		[[ ${VERBOSE} = on ]] && echo -e "\t>>> PIPE: ${MROOT}${pathto}"

		mkfifo -m "${posix}" "${MROOT}$pathto"
	done < ${BUILDDIR}/${pkgname}/.pipes

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function install_characterdevices               #
#	install_characterdevices $PKGNAME         #
###################################################
install_characterdevices()
{
	local pkgname="$1"
	local pathto
	local posix
	local major
	local minor
	local IFS

	# sanity checks; abort if not given
	[ -z "${pkgname}" ] && die "install_characterdevices() \$pkgname not given."

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "install_characterdevices() \$BUILDDIR not set."

	[ ! -f ${BUILDDIR}/${pkgname}/.char ] && die "install_characterdevices() .char not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix major minor
	do
		[ -z "${pathto}" ] && continue
		[[ ${VERBOSE} = on ]] && echo -e "\t>>> CHAR: ${MROOT}${pathto}"

		mknod -m ${posix} "${MROOT}${pathto}" c ${major} ${minor}
	done < ${BUILDDIR}/${pkgname}/.char

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function build_doinstall                        #
#	build_doinstall $PKGNAME                  #
# NOTE: this is an wrapper do install packages    #
###################################################
build_doinstall()
{
	local pkgname="$1"

	# sanity checks; abort if not given
	[ -z "${pkgname}" ] && die "build_doinstall() \$pkgname not given."
	
	# this is only a wrapper

	# NOTE:
	# !! we use § as field seperator !!
	# doing so prevent us to get errors by filenames with spaces

	# create a new mtime reference file
	touch ${BUILDDIR}/${pkgname}/.mtime

	install_directories ${pkgname} || die "install directories ${pkgname}"
	install_files ${pkgname} || die "install files ${pkgname}"
	install_symlinks ${pkgname} || die "install symlinks ${pkgname}"
	install_blockdevices ${pkgname} || die "install blockdevices ${pkgname}"
	install_characterdevices ${pkgname} || die "install chardevices ${pkgname}"
}


###################################################
# function install_database_entry                 #
#	install_database_entry $PKGNAME $PKGTYPE  #
# PKGTYPE can be "virtual", "sources" or nothing  #
###################################################
install_database_entry()
{
	local pcat
	local pname
	local pver
	local pbuild
	local pkgtype
	local pkgname
	local magefile
	local dbrecorddir
	local provide
	local i

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
			--pkgname|-a) shift; pkgname="$1" ;;
			--pkgtype|-t) shift; pkgtype="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "install_database_entry() \$pcat not given."
	[ -z "${pname}" ] && die "install_database_entry() \$pname not given."
	[ -z "${pver}" ] && die "install_database_entry() \$pver not given."
	[ -z "${pbuild}" ] && die "install_database_entry() \$pbuild not given."
	[ -z "${pkgname}" ] && die "install_database_entry() \$pkgname not given."

	# check needed global vars
	[ -z "${MAGEDIR}" ] && die "install_database_entry() \$MAGEDIR not set."
	[ -z "${INSTALLDB}" ] && die "install_database_entry() \$INSTALLDB not set."

	# set needed vars
	magefile="${MAGEDIR}/${pcat}/${pname}/${pname}-${pver}-${pbuild}.mage"
	dbrecorddir="${MROOT}${INSTALLDB}/${pcat}/${pname}-${pver}-${pbuild}"

	# abort if mage file not exists
	[ ! -f ${magefile} ] && die "install_database_entry() ${magefile} not exist."

	# add package to database
	install -d ${dbrecorddir}

	# install mage-file to database
	install -m 0644 -o root -g root ${magefile} ${dbrecorddir}

	# create fake file descriptors
	# used by virtual and source packages
	for i in .dirs .symlinks .files .pipes .char
	do
		touch ${dbrecorddir}/${i}
	done

	# put the category to database
	echo ${pcat} > ${dbrecorddir}/.categorie

	# now install PKGTYPE specific files
	case ${pkgtype} in
		virtual) touch ${dbrecorddir}/.virtual ;;
		sources) touch ${dbrecorddir}/.sources ;;
		*)
			# !move! .mtime to database (only mv modifies not the mtime!!)
			mv ${BUILDDIR}/${pkgname}/.mtime ${dbrecorddir}/.mtime

			# normal packages needs these files
			local i
			for i in .char .dirs .files .pipes .symlinks
			do
				install -m 0644 ${BUILDDIR}/${pkgname}/${i} \
					${dbrecorddir}/${i}
			done
			;;
	esac

	# last but not least register virtuals
	provide="$(get_value_from_magefile PROVIDE ${magefile})"
	if [ -n "${provide}" ]
	then
		for i in ${provide}
		do
			virtuals_add "${i}" "${pcat}/${pname}"
		done
	fi
}


###################################################
# function remove_database_entry                 #
#	remove_database_entry $PKGNAME $PKGTYPE  #
# PKGTYPE can be "virtual", "sources" or nothing  #
###################################################
remove_database_entry()
{
	local pcat
	local pname
	local pver
	local pbuild
	local magefile
	local dbrecorddir
	local provide
	local i

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "remove_database_entry() \$pcat not given."
	[ -z "${pname}" ] && die "remove_database_entry() \$pname not given."
	[ -z "${pver}" ] && die "remove_database_entry() \$pver not given."
	[ -z "${pbuild}" ] && die "remove_database_entry() \$pbuild not given."

	# check needed global vars
	[ -z "${INSTALLDB}" ] && die "remove_database_entry() \$INSTALLDB not set."

	# set needed vars
	magefile="${MROOT}${INSTALLDB}/${pcat}/${pname}-${pver}-${pbuild}/${pname}-${pver}-${pbuild}.mage"
	dbrecorddir="${MROOT}${INSTALLDB}/${pcat}/${pname}-${pver}-${pbuild}"

	# abort if mage file not exists
	[ ! -f ${magefile} ] && die "remove_database_entry() ${magefile} not exist."

	# remove virtuals only if no other exist
	if [[ $(count_installed_pkgs --pcat ${pcat} --pname ${pname}) -le 1 ]]
	then
		# first unregister virtuals
		provide="$(get_value_from_magefile PROVIDE ${magefile})"
		if [ -n "${provide}" ]
		then
			for i in ${provide}
			do
				virtuals_del "${i}" "${pcat}/${pname}"
			done
		fi
	fi

	# removes database entry
	if [ -d ${dbrecorddir} ]
	then
		rm -rf ${dbrecorddir}
	fi
}

# get the number of installed packages
count_installed_pkgs()
{
	local pcat
	local pname
	local pkg
	local i

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "pkg_count() \$pcat not given."
	[ -z "${pname}" ] && die "pkg_count() \$pname not given."

	declare -i i=0
	for pkg in $(get_uninstall_candidates --pcat ${pcat} --pname ${pname})
	do
		(( i++ ))
		#echo "$i ${pkg}"
	done

	# return the value
	echo "${i}"
}


###################################################
# function compare_mtime                          #
#	compare_mtime $pcat/$PKGNAME /path/to/file #
#                                                 #
# returns:                                        #
#           0=delete me                           #
#           1=keep me                             #
#                                                 #
# compares mtime of given files in packages       #
###################################################
compare_mtime()
{
	local pfull="$1"
	local pathto="$2"
	local mtime
	local pcat
	local x

	mtime="$(stat -c %Y ${MROOT}${INSTALLDB}/${pfull}/.mtime)"

	# if $pathto is a symlink than compare linked binary
	if [ -L "${MROOT}${pathto}" ]
	then
		# readlink -f resolves full path of linked file
		x="$(readlink -f "${MROOT}${pathto}")"

		# abort if target does not exists
		# we keep safe here, theoretically the link can removed
		[ ! -e "${x}" ] && return 1

		x=$(stat -c %Y "${x}")
	else
		x=$(stat -c %Y "${MROOT}${pathto}")
	fi

	[[ ${mtime} = ${x} ]] && return 0

	# echo "keep me  : ${pathto}"
	return 1
}


###################################################
# function remove_symlinks                        #
#	remove_symlinks $PKGNAME                  #
###################################################
remove_symlinks()
{
	local pathto
	local posix
	local link
	local mtime
	local IFS
	local retval
	local pcat
	local pname
	local pver
	local pbuild
	local i
	local pfull

	IFS=$'\n'

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "remove_symlinks() \$pcat not given."
	[ -z "${pname}" ] && die "remove_symlinks() \$pname not given."
	[ -z "${pver}" ] && die "remove_symlinks() \$pver not given."
	[ -z "${pbuild}" ] && die "remove_symlinks() \$pbuild not given."
	pfull="${pcat}/${pname}-${pver}-${pbuild}"

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "remove_symlinks() \$BUILDDIR not set."

	[ ! -f ${MROOT}${INSTALLDB}/${pfull}/.symlinks ] && die "remove_symlinks() .symlinks not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix link mtime
	do
		[ -z "${pathto}" ] && continue
		if [ ! -L "${MROOT}${pathto}" ]
		then
			[[ ${VERBOSE} = on ]] && \
				echo -e "${COLRED}! exist${COLDEFAULT} === LINK: ${MROOT}${pathto}"
			continue
		fi

		# *no* ${MROOT}, will be set internal
		compare_mtime "${pfull}" "${pathto}"
		retval=$?
		# 0=delete me #
		# 1=keep me   #
		case ${retval} in
			0)
				[[ ${VERBOSE} = on ]] && echo -e "\t<<< LINK: ${MROOT}${pathto}"
				rm "${MROOT}${pathto}"
				;;

			1)
				[[ ${VERBOSE} = on ]] && \
					echo -e "${COLRED}! mtime${COLDEFAULT} === LINK: ${MROOT}${pathto}"
				;;
		esac
	done < ${MROOT}${INSTALLDB}/${pfull}/.symlinks

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function remove_files                           #
#	remove_files $PKGNAME                     #
###################################################
remove_files()
{
	local pathto
	local posix
	local user
	local group
	local mtime
	local md5sum
	local IFS
	local retval
	local pcat
	local pname
	local pver
	local pbuild
	local i
	local pfull

	IFS=$'\n'

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "remove_symlinks() \$pcat not given."
	[ -z "${pname}" ] && die "remove_symlinks() \$pname not given."
	[ -z "${pver}" ] && die "remove_symlinks() \$pver not given."
	[ -z "${pbuild}" ] && die "remove_symlinks() \$pbuild not given."
	pfull="${pcat}/${pname}-${pver}-${pbuild}"

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "remove_files() \$BUILDDIR not set."

	[ ! -f ${MROOT}${INSTALLDB}/${pfull}/.files ] && die "remove_files() .files not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix user group mtime md5sum
	do
		[ -z "${pathto}" ] && continue

		if [ ! -e "${MROOT}${pathto}" ]
		then
			[[ ${VERBOSE} = on ]] && \
				echo -e "${COLRED}! exist${COLDEFAULT} === FILE: ${MROOT}${pathto}"
			continue
		fi

		# *no* ${MROOT}, will be set internal
		compare_mtime "${pfull}" "${pathto}"
		retval=$?
		# 0=delete me #
		# 1=keep me   #
		case ${retval} in
			0)
				# check if the file is config_protected
				# ${MROOT} will automatically added if set !!
				is_config_protected "${pathto}"
				retval="$?"
		
				# 0 - not protected        #
				# 1 - error                #
				# 2 - protected            #
				# 3 - protected but masked #
		
				case ${retval} in
					# file is not protected - delete it
					0|3)
						[[ ${VERBOSE} = on ]] && echo -e "\t<<< FILE: ${MROOT}${pathto}"
						rm "${MROOT}${pathto}"
						;;

					# file is protected, do not delete
					2)
						if [[ ${VERBOSE} = on ]]
						then
							echo -en "${COLRED}"
							echo -n "! prot "
							echo -en "${COLDEFAULT}"
							echo " === FILE: ${MROOT}${pathto}"
						fi
						;;
				esac
				;;
			1)
				[[ ${VERBOSE} = on ]] && \
					echo -e "${COLRED}! mtime${COLDEFAULT} === FILE: ${MROOT}${pathto}"
				;;
		esac
	done < ${MROOT}${INSTALLDB}/${pfull}/.files

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function remove_blockdevices                    #
#	remove_blockdevices $PKGNAME              #
###################################################
remove_blockdevices()
{
	local pathto
	local posix
	local IFS
	local pcat
	local pname
	local pver
	local pbuild
	local i
	local pfull

	IFS=$'\n'

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "remove_symlinks() \$pcat not given."
	[ -z "${pname}" ] && die "remove_symlinks() \$pname not given."
	[ -z "${pver}" ] && die "remove_symlinks() \$pver not given."
	[ -z "${pbuild}" ] && die "remove_symlinks() \$pbuild not given."
	pfull="${pcat}/${pname}-${pver}-${pbuild}"

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "remove_blockdevices() \$BUILDDIR not set."

	[ ! -f ${MROOT}${INSTALLDB}/${pfull}/.pipes ] && die "remove_blockdevices() .pipes not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix
	do
		[ -z "${pathto}" ] && continue

		[[ ${VERBOSE} = on ]] && echo -e "\t<<< PIPE: ${MROOT}${pathto}"
		rm "${MROOT}${pathto}"
	done < ${MROOT}${INSTALLDB}/${pfull}/.pipes

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function remove_characterdevices                #
#	remove_characterdevices $PKGNAME          #
###################################################
remove_characterdevices()
{
	local pathto
	local posix
	local IFS
	local pcat
	local pname
	local pver
	local pbuild
	local i
	local pfull

	IFS=$'\n'

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "remove_symlinks() \$pcat not given."
	[ -z "${pname}" ] && die "remove_symlinks() \$pname not given."
	[ -z "${pver}" ] && die "remove_symlinks() \$pver not given."
	[ -z "${pbuild}" ] && die "remove_symlinks() \$pbuild not given."
	pfull="${pcat}/${pname}-${pver}-${pbuild}"

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "remove_characterdevices() \$BUILDDIR not set."

	[ ! -f ${MROOT}${INSTALLDB}/${pfull}/.char ] && die "remove_characterdevices() .char not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	while read pathto posix
	do
		[ -z "${pathto}" ] && continue

		[[ ${VERBOSE} = on ]] && echo -e "\t<<< CHAR: ${MROOT}${pathto}"
		rm "${MROOT}${pathto}"
	done < ${MROOT}${INSTALLDB}/${pfull}/.char

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function remove_direcories                      #
#	remove_direcories $PKGNAME                #
###################################################
remove_directories()
{
	local pathto
	local posix
	local IFS
	local pcat
	local pname
	local pver
	local pbuild
	local i
	local pfull

	IFS=$'\n'

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "remove_symlinks() \$pcat not given."
	[ -z "${pname}" ] && die "remove_symlinks() \$pname not given."
	[ -z "${pver}" ] && die "remove_symlinks() \$pver not given."
	[ -z "${pbuild}" ] && die "remove_symlinks() \$pbuild not given."
	pfull="${pcat}/${pname}-${pver}-${pbuild}"

	# check needed global vars
	[ -z "${BUILDDIR}" ] && die "remove_directories() \$BUILDDIR not set."

	[ ! -f ${MROOT}${INSTALLDB}/${pfull}/.char ] && die "remove_directories() .dirs not found"

	# sets fieldseperator to "§" instead of " "
	IFS=§

	# reversed order is mandatory !
	tac ${MROOT}${INSTALLDB}/${pfull}/.dirs | while read pathto posix
	do
		[ -z "${pathto}" ] && continue

		if [ ! -d "${MROOT}${pathto}" ]
		then
			[[ ${VERBOSE} = on ]] && \
				echo -e "${COLRED}! exist${COLDEFAULT} === DIR:  ${MROOT}${pathto}"
			continue
		fi

		# exclude .keep directories
		if [ -f "${MROOT}${pathto}/.keep" ]
		then
			[[ ${VERBOSE} = on ]] && \
				echo -e "${COLRED}! .keep${COLDEFAULT} === DIR:  ${MROOT}${pathto}"
			continue
		fi

		# monitors /etc/env.d -> env-rebuild
		[[ ${pathto} = /etc/env.d ]] && export MAGE_ENV_REBUILD=true

		# monitors /usr/share/info -> info-rebuild
		[[ ${pathto} = /usr/share/info ]] && export MAGE_INFO_REBUILD=true

		if rmdir "${MROOT}${pathto}" &> /dev/null
		then
			[[ ${VERBOSE} = on ]] && echo -e "\t<<< DIR:  ${MROOT}${pathto}"
		else
			[[ ${VERBOSE} = on ]] && \
				echo -e "${COLRED}! empty${COLDEFAULT} === DIR:  ${MROOT}${pathto}"
		fi
	done

	# very important: unsetting the '§' fieldseperator
	IFS=$'\n'
}


###################################################
# function build_douninstall                      #
#	build_douninstall $PKGNAME                #
# NOTE: this is an wrapper do remove packages     #
###################################################
build_douninstall()
{
	local pcat
	local pname
	local pver
	local pbuild
	local i

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "build_douninstall() \$pcat not given."
	[ -z "${pname}" ] && die "build_douninstall() \$pname not given."
	[ -z "${pver}" ] && die "build_douninstall() \$pver not given."
	[ -z "${pbuild}" ] && die "build_douninstall() \$pbuild not given."

	# this is only a wrapper

	# NOTE:
	# !! we use § as field seperator !!
	# doing so prevent us to get errors by filenames with spaces

	for i in symlinks files blockdevices characterdevices directories
	do
		remove_${i} \
			--pcat "${pcat}" \
			--pname "${pname}" \
			--pver "${pver}" \
			--pbuild "${pbuild}" \
			|| die "remove ${i} ${pcat}/${pname}-${pver}-${pbuild}"
	done
}

# fetch_packages /path/to/mage/file1 /path/to/mage/file2
fetch_packages()
{
	local list="$@"
	local pkg
	local mirr
	local magefile
	local md5file
	local opt
	local count_current
	local count_total

	[ -z "${MIRRORS}" ] && die "You have no mirrors defined. Please edit your /etc/mage.rc."

	# get count of total packages
	declare -i count_current=0
	declare -i count_total=0

	for i in ${list}; do (( count_total++ )); done

	for magefile in ${list}
	do
		pkg="$(get_value_from_magefile PKGNAME ${magefile}).${PKGSUFFIX}"
		pkgtype="$(get_value_from_magefile PKGTYPE ${magefile})"

		(( count_current++ ))
		xtitle "[ (${count_current}/${count_total}) Fetching ${pkg} ]"

		# abort on virtual pkg
		if [[ ${pkgtype} = virtual ]]
		then
			echo -ne " ${COLBLUE}---${COLDEFAULT}"
			echo " !fetch virtual (${count_current}/${count_total}): ${pkg/.${PKGSUFFIX}/} ... "
			continue
		fi

		# abort on sources pkg
		if [[ ${pkgtype} = sources ]]
		then
			echo -ne " ${COLBLUE}---${COLDEFAULT}"
			echo " !fetch sources (${count_current}/${count_total}): ${pkg/.${PKGSUFFIX}/} ... "
			continue
		fi

		# abort if already exist
		if [ -f ${PKGDIR}/${pkg} ]
		then
			echo -ne " ${COLBLUE}***${COLDEFAULT}"
			echo " fetch complete (${count_current}/${count_total}): ${pkg} ... "
			continue
		fi

		for mirr in ${MIRRORS}
		do
			echo -ne " ${COLBLUE}***${COLDEFAULT}"
			#echo -e " fetching (${count_current}/${count_total}): ${mirr}/${pkg} ... "
			echo -e " fetching (${count_current}/${count_total}): ${pkg} ... "
			[[ ${VERBOSE} = off ]] && opt="--quiet"
			wget \
				--passive-ftp \
				--tries 3 \
				--continue \
				--progress bar \
				--directory-prefix=${PKGDIR} \
				${opt} ${mirr}/${PACKAGES_SERVER_PATH}/${pkg}
			if [[ $? = 0 ]]
			then
				break
			else
				continue
			fi
		done

		if [ ! -f ${PKGDIR}/${pkg} ]
		then
			die "Could not download ${pkg}"
		fi
	done

	# add a crlf for a better view
	if [ ${count_total} -gt 1 ]; then echo; fi
}

syncmage()
{
	if [ -z "${RSYNC}" ]
	then
		die "You have no rsync-mirrors defined. Please edit your /etc/mage.rc."
	fi

	local i
	for i in ${RSYNC}
	do
		rsync \
			--recursive \
			--links \
			--perms \
			--times \
			--devices \
			--timeout=600 \
			--verbose \
			--compress \
			--progress \
			--stats \
			--delete \
			--delete-after \
			${i} ${MAGEDIR}
		if [[ $? = 0 ]]
		then
			break
		else
			continue
		fi
	done

	# clean up backup files (foo~)
	find ${MAGEDIR} -name *~ -exec rm '{}' ';'

	# check if an newer mage version is available
	is_newer_mage_version_available
}

cleanpkg()
{
	if [ -d "${PKGDIR}" ]
	then
		echo -n "Removing downloaded packages... "
		rm -rf ${PKGDIR}/*
		echo "done."
	fi
}

xtitle()
{
	if [[ ${TERM} = xterm ]]
	then
		echo -ne "\033]0;Mage: $1\007"
	fi
	return 0
}


xtitleclean()
{
	if [[ ${TERM} = xterm ]]
	then
		echo -ne "\033]0;\007"
	fi
	return 0
}


# cuts full pathnames or versioniezed names down to basename
choppkgname()
{
	#we want this only if full name was used
	if [ -n "$(echo ${MAGENAME}|fgrep .mage)" ]
	then
		#cuts ARCH and PBUILD
		#ARCH comes from /etc/mage.rc
		MAGENAME=$(echo ${MAGENAME} |sed -e "s:-${ARCH}-r*.::g")

		#cuts version number
		MAGENAME=$(basename ${MAGENAME%-*} .mage)
	fi
}

# get_categorie $PNAME, returns CATEGORIE
# $1=pname
# ret 0=ok, 1=not_found
pname2pcat()
{
	local pname="$1"
	local repo="$2"
	local pcat
	local categorie

	for pcat in ${MAGEDIR}/*
	do
		if [ -d ${pcat}/${pname} ]
		then
			categorie=$(basename ${pcat})
		fi
	done

	echo "${categorie}"
}

# check_stable_package /path/to/foo.mage
# returns 0=stable 1=unstable
check_stable_package()
{
	local STATE
	STATE="$(get_value_from_magefile STATE "$1")"

	# state testing
	if [[ ${USE_TESTING} = true ]] || [[ ${MAGE_DISTRIBUTION} = testing ]]
	then
		case ${STATE} in
			testing|stable) return 0 ;;
			*) return 1 ;;
		esac
	fi

	# state unstable
	if [[ ${USE_UNSTABLE} = true ]] || [[ ${MAGE_DISTRIBUTION} = unstable ]]
	then
		case ${STATE} in
			unstable|testing|stable) return 0 ;;
			*) return 1 ;;
		esac
	fi

	# no use_state given = stable
	case ${STATE} in
		stable) return 0 ;;
		*) return 1 ;;
	esac
}


# get_highest_magefile ${PCAT} ${PNAME}
# fake at moment returns only stable pkgs (must set to be one)
# return $HIGHEST_MAGEFILE
get_highest_magefile()
{
	local HIGHEST_MAGEFILE
	local PCAT="$1"
	local PNAME="$2"
	local magefile

	for magefile in $(ls --format=single-column -v ${MAGEDIR}/${PCAT}/${PNAME}/*)
	do
		# we exclude subdirs (for stuff like a md5sum dir)
		[ -d ${magefile} ] && continue
		if check_stable_package ${magefile}
		then
			HIGHEST_MAGEFILE=${magefile}
			#for debug only
			[[ ${MAGEDEBUG} = on ]] && echo "HIGHEST_MAGEFILE=${HIGHEST_MAGEFILE}"
		fi
	done

	# stop here if HIGHEST_MAGEFILE is zero
	# this package must be unstable or old
	if [ -z "${HIGHEST_MAGEFILE}" ]
	then
		echo
		echo -n "All packages named "
		echo -en ${COLRED}\""${PKGNAME%-*-*-*}\""${COLDEFAULT}
		echo -n " are marked "
		echo -en ${COLRED}"*UNSTABLE*"${COLDEFAULT}
		echo "."
		echo "You need to declare USE_UNSTABLE=true to install this."
		echo 
		echo "Example:"
		echo "         USE_UNSTABLE=true mage install ${PKGNAME%-*-*-*}"
		echo
		echo "Be warned that these packages are not stable and may cause serious problems."
		echo "You should know what you are doing, so don't complain about any damage."
		echo
		return 1
	fi

	echo "${HIGHEST_MAGEFILE}"
	return 0
}


###################################################
# function is_config_protected                    #
#       is_config_protected /path/to/file         #
#                                                 #
# returns:                                        #
#        0 - not protected                        #
#        1 - error                                #
#        2 - protected                            #
#        3 - protected but masked                 #
#                                                 #
###################################################
is_config_protected()
{
	local EXPFILE
	local TEST
	local PROTECTED
	local IFS

	EXPFILE="${MROOT}$1"

	# file does not exist; it can be written
	[ ! -e ${EXPFILE} ] && return 0

	# to be safe; it may be '§'
	IFS=' '

	# check ob in config protect
	for i in ${CONFIG_PROTECT}
	do
		# ersetzen von $i nur wenn am anfang der variable
		TEST="${EXPFILE/#${MROOT}${i}/Protected}"
		if [ "${TEST}" != "${EXPFILE}" ]
		then
			# setzen das es protected ist
			PROTECTED=TRUE

			# check ob nicht doch maskiert
			for x in ${CONFIG_PROTECT_MASK}
			do
				TEST="${EXPFILE/#${MROOT}${x}/Protect_Masked}"
				if [ "${TEST}" != "${EXPFILE}" ]
				then
					PROTECTED=MASKED
				fi
			done
		fi
	done

	unset IFS

	case ${PROTECTED} in
		TRUE)
			#echo "I'm protected"
			return 2
			;;
		MASKED)
			#echo "I'm protected, but masked - delete me"
			return 3
			;;
		*)
			#echo "delete me"
			return 0
			;;
	esac
}


###################################################
# function count_protected_files                  #
#       count_protected_files /path/to/file       #
#                                                 #
# note: prints number of protected files          #
#       exp: 0012                                 #
###################################################
count_protected_files()
{
	${MLIBDIR}/writeprotected "$1"
}

# call with
# 'get_uninstall_candidates (--pcat cat --protected pcat/pfull) --pname PNAME'
# returns /path/to/magefile(s)
get_uninstall_candidates()
{
	local search_pname
	local pkg
	local pcat
	local pname
	local pver
	local pbuild
	local list
	local pcatdir
	local protected

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcatdir="$1" ;;
			--pname|-n) shift; search_pname="$1" ;;
			--protected|-p) shift; protected="$1" ;;
		esac
		shift
	done

# it's not good to complain here about empty pnames; better to continue later anyway
#	# sanity checks; abort if not given
#	[ -z "${search_pname}" ] && die "get_uninstall_candidates() \$search_pname not given."


	# check needed global vars
	[ -z "${INSTALLDB}" ] && die "get_uninstall_candidates() \$INSTALLDB not set."

	# set pcatdir to '*' if empty
	[ -z "${pcatdir}" ] && pcatdir='*'

	for pkg in ${MROOT}${INSTALLDB}/${pcatdir}/*
	do
		# abort if not a dir
		[ ! -d ${pkg} ] && continue

		pname="$(magename2pname ${pkg})"

		if [[ ${search_pname} = ${pname} ]]
		then
			pcat="$(magename2pcat ${pkg} installdb)"
			pver="$(magename2pver ${pkg})"
			pbuild="$(magename2pbuild ${pkg})"

			# exclude proteced
			[[ ${protected} = ${pcat}/${pname}-${pver}-${pbuild} ]] && continue

			list="${list} ${pcat}/${pname}-${pver}-${pbuild}"
		fi
	done

	echo "${list}"
}

# reads virtualdb file
#$1 = virtualname; $2 commands: showpkgs, showline
#return 0 == installed -> shows installed pkg as well
#return 1 == not installed
virtuals_read()
{
	local virtualname="$1"
	local command="$2"
	local virtline
	local line x i

	# parse file to get virtual_name line
	IFS=$'\n'
	for line in $(< ${MROOT}${VIRTUALDB_FILE})
	do
		IFS=$' '
		for x in ${line}
		do
			if [[ ${x} = ${virtualname} ]]
			then
				virtline="${line}"
				[[ ${command} = showline ]] && echo "${line}"
			fi
		done
		IFS=$'\n'
	done

	unset IFS

	# now read the packages linked to VIRTUAL_NAME and output them
	if [ -n "${virtline}" ]
	then
		if [[ ${command} = showpkgs ]]
		then
			declare -i x=0
			for i in ${virtline}
			do
				if [ ${x} -ge 1 ]
				then
					echo "${i}"
				fi
				((x++))
			done
		fi
		return 0
	fi
	return 1
}


#add pkg to virtualdb
# $1 == virtualname $2= pkgname
# retvals: 0=ok,added; 1=error; 3=pkg already in virtual
virtuals_add()
{
	local virtualname="$1"
	local pkgname="$2"
	local oldline
	local line i
	local installed_file
	local OLDIFS

	if virtuals_read ${virtualname}
	then
		# make sure ${PKG_NAME} is *not* in ${VIRTUAL_NAME} already
		for i in $(virtuals_read ${virtualname} showpkgs)
		do
			if [[ ${i} = ${pkgname} ]]
			then
				echo -ne "${COLBLUE} --- ${COLDEFAULT}"
				echo "${pkgname} already linked as ${virtualname} ..."
				#return 3
				return 0
			fi
		done

		echo -ne "${COLBLUE} *** ${COLDEFAULT}"
		echo "updating ${virtualname} entry with ${pkgname} ..."
		oldline="$(virtuals_read ${virtualname} showline)"

		# make a backup
		mv ${MROOT}${VIRTUALDB_FILE} ${MROOT}${VIRTUALDB_FILE}.old

		OLDIFS="${IFS}"
		IFS=$'\n'
		for line in $(< ${MROOT}${VIRTUALDB_FILE}.old)
		do
			# if the right line, append ${pkgname}, else do nothing
			if [[ ${line} = ${oldline} ]]
			then
				echo "${line} ${pkgname}" >> ${MROOT}${VIRTUALDB_FILE}
			else
				echo "${line}" >> ${MROOT}${VIRTUALDB_FILE}
			fi
		done
		# unset IFS
		IFS="${OLDIFS}"
	else
		echo -ne "${COLBLUE} >>> ${COLDEFAULT}"
		echo "register ${pkgname} as ${virtualname} ..."
		echo "${virtualname} ${pkgname}" >> ${MROOT}${VIRTUALDB_FILE}
	fi

	return 0
}

#deletes pakages from virtual database
#$1 virtualname; $2 pkgname
virtuals_del() {

	local virtualname="$1"
	local pkgname="$2"
	local oldline
	local method
	local line i x
	local pkg_installed
	local OLDIFS

	# first check if exists
	if virtuals_read ${virtualname}
	then
		# get method -> delall or update and check if ${PKG_NAME} exists in ${VIRTUAL_NAME}
		declare -i x=0
		for i in $(virtuals_read ${virtualname} showpkgs)
		do
			if [[ ${i} = ${pkgname} ]]
			then
				pkg_installed=true
			fi
			((x++))
		done

		# abort if not installed
		if [[ ${pkg_installed} != true ]]
		then
			echo -ne "${COLBLUE} --- ${COLDEFAULT}"
			echo "${pkgname} does not exists in ${virtualname}."
			return 0
		fi

		if [ ${x} -ge 2 ]
		then
			method=update
		else
			method=delall
		fi

		# get the complete line
		oldline="$(virtuals_read ${virtualname} showline)"

		# make a backup of the db
		mv ${VIRTUALDB_FILE} ${VIRTUALDB_FILE}.old

		# parse virtualdb
		OLDIFS="${IFS}"
		IFS=$'\n'
		for line in $(< ${VIRTUALDB_FILE}.old)
		do
			if [[ ${line} = ${oldline} ]]
			then
				#delall or update?
				case ${method} in
					update)
						echo -ne "${COLBLUE} *** ${COLDEFAULT}"
						echo "Unlinking ${pkgname} from ${virtualname} in virtual database ..."
						# del PKG_NAME from line
						echo "${line/ ${pkgname}/}" >> ${VIRTUALDB_FILE}
						;;
					delall)
						echo -ne "${COLBLUE} <<< ${COLDEFAULT}"
						echo "Deleting ${virtualname} in virtual database ..."
						# continue; do not write anything
						continue
						;;
				esac
			else
				echo "${line}" >> ${VIRTUALDB_FILE}
			fi
		done
		# unset IFS
		IFS="${OLDIFS}"
	else
		echo -ne "${COLBLUE} --- ${COLDEFAULT}"
		echo "${virtualname} does not exists in virtual database."
	fi
}

# gets real pkgname from virtuals.default
#$1=VIRTUAL_NAME; returns PKG_NAME
default_virtualname_to_pkgname()
{
	local VIRTUAL_NAME PKG_NAME db_virtualname db_pkgname
	
	VIRTUAL_NAME=$1
	
	while read db_virtualname db_pkgname
	do
		if [ "${db_virtualname}" == "${VIRTUAL_NAME}"  ]
		then
			PKG_NAME="${db_pkgname}"
		fi
	done << EOF
$(< ${VIRTUALDB_DEFAULTS})
EOF

	if [ -n "${PKG_NAME}" ]
	then
		echo "${PKG_NAME}"
	fi
}

minclude()
{
	local i

	if [ -n "$@" ]
	then
		for i in $@
		do
			[[ ${MAGEDEBUG} = on ]] && \
				echo "--- Including ${MAGEDIR}/include/${i}.minc"
			source ${MAGEDIR}/include/${i}.minc
		done
		[[ ${MAGEDEBUG} = on ]] && echo
	fi
}

sminclude()
{
	local i

	if [ -n "$@" ]
	then
		for i in $@
		do
			echo "--- Including ${SMAGESCRIPTSDIR}/include/${i}.sminc"
			source ${SMAGESCRIPTSDIR}/include/${i}.sminc
		done
		echo
	fi
}

# checks if an newer mage version is available
is_newer_mage_version_available()
{
	local newest_mage
	local installed_mage

	newest_mage="$(basename $(get_highest_magefile app-mage mage) .mage)"
	installed_mage="$(magequery -n mage | cut -d' ' -f5)"

	if [[ ${newest_mage} > ${installed_mage} ]]
	then
		echo
		echo -en ${COLRED}"An update for your packetmanager is available. "${COLDEFAULT}
		echo -e ${COLBLUE}"[ ${newest_mage} ]"${COLDEFAULT}
		echo "It is recommened to install this newer version"
		echo "or your current system installation may brake."
		echo
		echo -en "Please update mage by running "
		echo -e ${COLGREEN}"'mage install mage'"${COLDEFAULT}
		echo
	fi
}


# returns pname from pkgname
# pkgname2pname $PKGNAME
pkgname2pname()
{
	local pname

	pname="${1%-*-*-*}"
	echo "${pname}"
}

# returns pver from pkgname
# pkgname2pver $PKGNAME
pkgname2pver()
{
	local i pver

	i="${1/$(pkgname2pname $1)-/}"
	pver="${i%-*-*}"
	echo "${pver}"
}

# returns pbuild from pkgname
# pkgname2pbuild $PKGNAME
pkgname2pbuild()
{
	local pbuild

	pbuild="${1##*-}"
	echo "${pbuild}"
}

# returns parch from pkgname
# pkgname2parch $PKGNAME
pkgname2parch()
{
	local i x parch

	i="${1%-*-*}-"
	x="${1%-*}"
	parch="${x/${i}/}"
	echo "${parch}"
}

# returns pname from magename
# magename2pname /PATH/TO/MAGE/FILE
magename2pname()
{
	local i pname

	i="$(basename $1 .mage)"
	pname="${i%-*-*}"
	echo "${pname}"
}

# returns pver from magename
# magename2pver /PATH/TO/MAGE/FILE
magename2pver()
{
	local i pver

	i="$(basename $1 .mage)"
	i="${i/$(magename2pname $1)-/}"
	pver="${i%-*}"
	echo "${pver}"
}

# returns pbuild from magename
# magename2pbuild /PATH/TO/MAGE/FILE
magename2pbuild()
{
	local i pbuild

	i="$(basename $1 .mage)"
	pbuild="${i##*-}"
	echo "${pbuild}"
}

# returns pcat from magename
# magename2pcat /PATH/TO/MAGE/FILE
magename2pcat()
{
	local i pcat

	if [[ ${2} = installdb ]]
	then
		# go 1 dir back
		i="${1%/*}"
	else
		# go 2 dirs back
		i="${1%/*/*}"
	fi

	# get basename
	pcat="${i##*/}"
	echo "${pcat}"
}

# returns pcat from DEPEND (without operand ! PCAT/PNAME-VERSION)
# dep2pcat DEPEND
dep2pcat()
{
	local pcat

	pcat="${1%/*}"
	echo "${pcat}"
}

# returns pname from DEPEND (without operand ! PCAT/PNAME-VERSION)
# $2=virtual is used to resolv VDEPEND from virtual packages
# dep2pcat DEPEND (virtual)
dep2pname()
{
	local pname

	pname="${1##*/}"

	# cut version only if not virtual or it will cut the name
	if [[ $(dep2pcat $1) != virtual ]] && \
		 [[ $2 != virtual ]]
	then
		pname="${pname%-*}"
	fi

	echo "${pname}"
}

dep2highest_magefile()
{
	local pcat
	local pname
	local magefile
	local installed_virtuals

	pcat="$(dep2pcat $1)"
	pname="$(dep2pname $1)"

	if [[ ${pcat} = virtual ]]
	then
		# first check if virtual is already installed
		installed_virtuals="$(virtuals_read ${pcat}/${pname} showpkgs)"
		if [ -n "${installed_virtuals}" ]
		then
			for vpkg in ${installed_virtuals}
			do
				realpkgname="${vpkg}"
				virtualpkgname="${pcat}/${pname}"
				pcat="$(dep2pcat ${realpkgname})"
				pname="$(dep2pname ${realpkgname} virtual)"
			done
		else
			# choose one from virtualdb defaults (virtuals.defaults)
			realpkgname="$(default_virtualname_to_pkgname ${pcat}/${pname})"
			virtualpkgname="${pcat}/${pname}"
			pcat="$(dep2pcat ${realpkgname})"
			pname="$(dep2pname ${realpkgname} virtual)"
		fi
	fi

	magefile="$(get_highest_magefile ${pcat} ${pname})"
	echo "${magefile}"
}

# is_installed ${PCAT}/${PNAME}-${PVER}-${PBUILD}
is_installed()
{
	local fullpkgname="$1"

	# return 0 if installed
	[ -d ${MROOT}${INSTALLDB}/${fullpkgname} ] && return 0

	return 1
}

install_packages()
{
	local list="$@"
	local pkg
	local pcat
	local pname
	local pver
	local pbuild
	local total_pkgs
	local current_pkg
	local src_install
	local uninstall_list

	# check for --src-install
	if [[ $1 = --src-install ]]
	then
		# remove --src-install from list
		list=${list/--src-install/}
		# enable src-install
		src_install="--src-install"
	fi

	# reset MAGE_PROTECT_COUNTER
	declare -i MAGE_PROTECT_COUNTER=0
	export MAGE_PROTECT_COUNTER

	# get count of total packages
	declare -i total_pkgs=0
	declare -i current_pkg=0
	for i in ${list}; do (( total_pkgs++ )); done

	echo

	if [[ -n ${MROOT} ]]
	then
		echo -ne ${COLRED}
		echo "!! installing in MROOT=${MROOT}"
		echo -ne ${COLDEFAULT}
		echo
	fi

	for pkg in ${list}
	do
		(( current_pkg++ ))
		pcat=$(magename2pcat ${pkg})
		pname=$(magename2pname ${pkg})
		pver=$(magename2pver ${pkg})
		pbuild=$(magename2pbuild ${pkg})

		mage_install \
			--pcat ${pcat} \
			--pname ${pname} \
			--pver ${pver} \
			--pbuild ${pbuild} \
			--count-total ${total_pkgs} \
			--count-current ${current_pkg} \
			${src_install}

		# check for allready installed packages and remove them
		# except the package we have installed
		uninstall_list="$(get_uninstall_candidates \
			--pcat "${pcat}" \
			--pname "${pname}" \
			--protected ${pcat}/${pname}-${pver}-${pbuild})"

		# uninstall all packges in uninstall_list if not empty
		if [ -n "${uninstall_list}" ]
		then
			echo
			uninstall_packages ${uninstall_list} \
				|| die "install_packges() uninstalling not-needed."
		fi

		# crlf for better view in VERBOSE mode
		#if [[ ${VERBOSE} = on ]]; then echo; fi
		echo
	done

	#echo "DEBUG MAGE_PROTECT_COUNTER=${MAGE_PROTECT_COUNTER}"
	show_etc_update_mesg
}

# get_value_from_magefile VARIABLE
# returns the content of this VAR
get_value_from_magefile()
{
	local var="$1"
	local magefile="$2"
	local value

	# local all possible vars of a mage file
	# to prevent bad issues
	local PKGNAME
	local STATE
	local DESCRIPTION
	local HOMEPAGE
	local DEPEND
	local SDEPEND
	local PROVIDE
	local PKGTYPE
	local preinstall
	local postinstall
	local preremove
	local postremove

	# sanity checks
	[ -f ${magefile} ] && source ${magefile} || \
		die "get_value_from_magefile: ${magefile} not found."
	[ -z "${var}" ] && die "get_value_from_magefile: \$var not given."

	source ${magefile}
	eval value=\$$(echo ${var})
	echo "${value}"

	# unset these functions
	unset -f preinstall
	unset -f postinstall
	unset -f preremove
	unset -f postremove
}

mage_install()
{
	# local all possible vars of a mage file
	# to prevent bad issues
	local PKGNAME
	local STATE
	local DESCRIPTION
	local HOMEPAGE
	local DEPEND
	local SDEPEND
	local PROVIDE
	local PKGTYPE
	local preinstall
	local postinstall
	local preremove
	local postremove

	local pcat
	local pname
	local pver
	local pbuild
	local count_total
	local count_current
	local magefile
	local src_install

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
			--count-total) shift; count_total="$1" ;;
			--count-current) shift; count_current="$1" ;;
			--src-install|-s) shift; src_install=true ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "mage_install() \$pcat not given."
	[ -z "${pname}" ] && die "mage_install() \$pname not given."
	[ -z "${pver}" ] && die "mage_install() \$pver not given."
	[ -z "${pbuild}" ] && die "mage_install() \$pbuild not given."

	# check needed global vars
	[ -z "${MAGEDIR}" ] && die "mage_install() \$MAGEDIR not set."
	[ -z "${INSTALLDB}" ] && die "mage_install() \$INSTALLDB not set."
	[ -z "${BUILDDIR}" ] && die "mage_install() \$BUILDDIR not set."

	xtitle "[ (${count_current}/${count_total}) Installing ${pcat}/${pname}-${pver}-${pbuild} ]"
	echo -ne "${COLBLUE} >>> ${COLDEFAULT}"
	echo -n "installing (${count_current}/${count_total}): "
	echo -ne "${COLBLUE}${pcat}/${COLDEFAULT}"
	echo -e "${COLGREEN}${pname}-${pver}-${pbuild}${COLDEFAULT}"

	magefile="${MAGEDIR}/${pcat}/${pname}/${pname}-${pver}-${pbuild}.mage"
	source ${magefile}

	# abort on sources if no srcinstall
	if [[ ${PKGTYPE} = sources ]] && [[ ${src_install} != true ]]
	then
		echo
		echo -e  "This Package is a Source Package."
		echo
		echo -e  "Only 'srcinstall' works with this type of packages"
		echo -en "If you have done a srcinstall before, "
		echo -e  "you will find the files in /usr/src."
		echo
		exit 1
	fi

	## preinstall scripts
	if [ -n "$(typeset -f preinstall)" ]
	then
		echo -e " ${COLBLUE}***${COLDEFAULT} running preinstall ... "
		preinstall
		unset preinstall
	fi

	if [[ ${src_install} = true ]]
	then
		local smage2file
		# check needed global vars
		[ -z "${SMAGESCRIPTSDIR}" ] && die "\$SMAGESCRIPTSDIR not set."
		[ -z "${SOURCEDIR}" ] && die "\$SOURCEDIR not set."
		[ -z "${BINDIR}" ] && die "\$BINDIR not set."

		# build the package first
		if [[ ${MAGEDEBUG} = on ]]
		then
			echo M:${pname}
			echo V:${pver}
			echo B:${pbuild}
		fi

		smage2file=${SMAGESCRIPTSDIR}/${pname}/${pname}-${pver}-${pbuild}.smage2
		if [ -f "${smage2file}" ]
		then
			smage2 ${smage2file} || die "compile failed"
		else
			echo
			echo "$(basename ${SMAGEFILE}) not found."
			echo "update your smage-tree and try it again."
			echo
			die
		fi
	fi

	if [[ ${PKGTYPE} != virtual ]] && \
		[[ ${PKGTYPE} != sources ]]
	then
		# show a verbose message on src-install
		if [[ ${src_install} = true ]]
		then
			echo -ne "${COLBLUE} *** ${COLDEFAULT}"
			echo -ne "merging files: "
			echo -ne "${COLBLUE}${pcat}/${COLDEFAULT}"
			echo -e "${COLGREEN}${pname}-${pver}-${pbuild}${COLDEFAULT}"
		fi
		build_doinstall ${PKGNAME}
	fi

	## postinstall scripts
	if [ -n "$(typeset -f postinstall)" ]
	then
		echo -e " ${COLBLUE}***${COLDEFAULT} running postinstall ... "
		postinstall
		unset postinstall
	fi

	# install a database entry
	install_database_entry \
		--pcat "${pcat}" \
		--pname "${pname}" \
		--pver "${pver}" \
		--pbuild "${pbuild}" \
		--pkgname "${PKGNAME}" \
		--pkgtype "${PKGTYPE}" \
		|| die "error in mage_install() running install_database_entry()."

	# remove the package dir now
	if [ -d ${BUILDDIR}/${PKGNAME} ]
	then
		rm -rf ${BUILDDIR}/${PKGNAME}
	fi

	# rebuilds toplevel info node
	if [[ ${MAGE_INFO_REBUILD} = true ]]
	then
		echo -ne "${COLBLUE} *** ${COLDEFAULT}"
		echo -n "rebuilding top-level info node ... "
		${MLIBDIR}/mkinfodir ${MROOT}/usr/share/info \
			> ${MROOT}/usr/share/info/dir && \
			echo "done." || echo "failure."
		unset MAGE_INFO_REBUILD
	fi

	# rebuilds the enviroment with the content of /etc/env.d
	if [[ ${MAGE_ENV_REBUILD} = true ]]
	then
		echo -ne "${COLBLUE} *** ${COLDEFAULT}"
		echo -n "rebuilding environment ... "
		${MLIBDIR}/env-rebuild.sh > /dev/null && \
			echo "done." || echo "failure."
		unset MAGE_ENV_REBUILD
	fi

	xtitleclean

	echo -ne "${COLBLUE} --- ${COLDEFAULT}"
	echo -n "package "
# 	echo -ne "${COLBLUE}${pcat}/${COLDEFAULT}"
# 	echo -ne "${COLGREEN}${pname}-${pver}-${pbuild}${COLDEFAULT} "
	echo "successfully installed."

	# unset these functions
	unset -f preinstall
	unset -f postinstall
	unset -f preremove
	unset -f postremove
}

md5sum_packages()
{
	local list="$@"
	local magefile
	local pcat
	local pname
	local pkgname
	local pkgfile
	local pkgtype
	local count_current
	local count_total

	# get count of total packages
	declare -i count_current=0
	declare -i count_total=0

	for i in ${list}; do (( count_total++ )); done

	for magefile in ${list}
	do
		pcat=$(magename2pcat ${magefile})
		pname=$(magename2pname ${magefile})
		pkgname="$(get_value_from_magefile PKGNAME ${magefile})"
		md5file="${MAGEDIR}/${pcat}/${pname}/md5/${pkgname}.md5"
		pkgfile="$(get_value_from_magefile PKGNAME ${magefile}).${PKGSUFFIX}"
		pkgtype="$(get_value_from_magefile PKGTYPE ${magefile})"

		(( count_current++ ))
		xtitle "[ (${count_current}/${count_total}) MD5SUM: ${pkgfile} ]"

		# abort on virtual pkg
		if [[ ${pkgtype} = virtual ]]
		then
			echo -ne " ${COLBLUE}---${COLDEFAULT}"
			echo " !md5sum virtual (${count_current}/${count_total}): ${pkgfile/.${PKGSUFFIX}/} ... "
			continue
		fi

		# abort on sources pkg
		if [[ ${pkgtype} = sources ]]
		then
			echo -ne " ${COLBLUE}---${COLDEFAULT}"
			echo " !md5sum sources (${count_current}/${count_total}): ${pkgfile/.${PKGSUFFIX}/} ... "
			continue
		fi

		if [ -f "${md5file}" ]
		then
			echo -ne "${COLBLUE} *** ${COLDEFAULT}"
			echo -ne "checking md5sum (${count_current}/${count_total}): "
			( cd ${PKGDIR}; md5sum --check ${md5file}) || die "md5 for ${pkgfile} failed"
		else
			echo -ne "${COLBLUE} --- ${COLDEFAULT}"
			echo -e "!! no md5sum file found for ${pkgfile} :("
		fi
	done

	# add a crlf for a better view
	if [ ${count_total} -gt 1 ]; then echo; fi
}

## uninstall_packages ulist
uninstall_packages()
{
	local list="$@"
	local pcat
	local pname
	local pver
	local pbuild
	local can_pcat
	local can_pname
	local can_ver_list

	if [[ -n ${MROOT} ]]
	then
		echo -ne ${COLRED}
		echo "!! uninstalling from MROOT=${MROOT}"
		echo -ne ${COLDEFAULT}
		echo
	fi

	# generate a candidates list
	for pkg in ${list}
	do
		pcat=$(dep2pcat ${pkg})
		pname=$(magename2pname ${pkg})
		pver=$(magename2pver ${pkg})
		pbuild=$(magename2pbuild ${pkg})
		can_pcat="${pcat}"
		can_pname="${pname}"
	
		if [ -z "${can_ver_list}" ]
		then
			can_ver_list=" ${pver}-${pbuild}"
		else
			can_ver_list="${can_ver_list}, ${pver}-${pbuild}"
		fi
	done

	echo -ne "${COLBLUE} --- ${COLDEFAULT}"
	echo "following candidate(s) will be removed:"
	echo -ne "${COLBLUE} --- ${COLDEFAULT}"
	echo -ne "${COLBOLD}${can_pcat}/${can_pname}:${COLDEFAULT}"
	echo -e "${COLRED} ${can_ver_list} ${COLDEFAULT}"
	echo
	if [ ${MAGE_UNINSTALL_TIMEOUT} -gt 0 ]
	then
		echo -ne "${COLBLUE} --- ${COLDEFAULT}"
		echo "( Press [CTRL+C] to abort )"
		echo -ne "${COLBLUE} --- ${COLDEFAULT}"
		echo -n "Waiting ${MAGE_UNINSTALL_TIMEOUT} seconds ..."
		for ((i=MAGE_UNINSTALL_TIMEOUT; i >= 0; i--))
		do
			echo -ne "${COLRED} ${i}${COLDEFAULT}"
			sleep 1
		done
		echo
		echo
	fi

	for pkg in ${list}
	do
		pcat=$(dep2pcat ${pkg})
		pname=$(magename2pname ${pkg})
		pver=$(magename2pver ${pkg})
		pbuild=$(magename2pbuild ${pkg})

		mage_uninstall \
			--pcat ${pcat} \
			--pname ${pname} \
			--pver ${pver} \
			--pbuild ${pbuild} \
			--count-total ${total_pkgs} \
			--count-current ${current_pkg} \
			${src_install}

		# crlf for better view in VERBOSE mode
		#if [[ ${VERBOSE} = on ]]; then echo; fi
		echo
	done
}

mage_uninstall()
{
	# local all possible vars of a mage file
	# to prevent bad issues
	local PKGNAME
	local STATE
	local DESCRIPTION
	local HOMEPAGE
	local DEPEND
	local SDEPEND
	local PROVIDE
	local PKGTYPE
	local preinstall
	local postinstall
	local preremove
	local postremove

	local pcat
	local pname
	local pver
	local pbuild
	local magefile
	local i

	# very basic getops
	for i in $*
	do
		case $1 in
			--pcat|-c) shift; pcat="$1" ;;
			--pname|-n) shift; pname="$1" ;;
			--pver|-v) shift; pver="$1" ;;
			--pbuild|-b) shift; pbuild="$1" ;;
		esac
		shift
	done

	# sanity checks; abort if not given
	[ -z "${pcat}" ] && die "mage_uninstall() \$pcat not given."
	[ -z "${pname}" ] && die "mage_uninstall() \$pname not given."
	[ -z "${pver}" ] && die "mage_uninstall() \$pver not given."
	[ -z "${pbuild}" ] && die "mage_uninstall() \$pbuild not given."

	# check needed global vars
	[ -z "${MAGEDIR}" ] && die "mage_uninstall() \$MAGEDIR not set."
	[ -z "${INSTALLDB}" ] && die "mage_uninstall() \$INSTALLDB not set."
	[ -z "${BUILDDIR}" ] && die "mage_uninstall() \$BUILDDIR not set."

	xtitle "[ (${count_current}/${count_total}) Removing ${pcat}/${pname}-${pver}-${pbuild} ]"
	echo -ne "${COLBLUE} <<< ${COLDEFAULT}"
	echo -n "removing: "
	echo -ne "${COLBLUE}${pcat}/${COLDEFAULT}"
	echo -e "${COLGREEN}${pname}-${pver}-${pbuild}${COLDEFAULT}"

	magefile="${INSTALLDB}/${pcat}/${pname}-${pver}-${pbuild}/${pname}-${pver}-${pbuild}.mage"
	source ${magefile}

	## preremove scripts
	if [ -n "$(typeset -f preremove)" ]
	then
		echo -e " ${COLBLUE}***${COLDEFAULT} running preremove ... "
		preremove
		unset preremove
	fi

	# runs uninstall
	build_douninstall \
		--pcat "${pcat}" \
		--pname "${pname}" \
		--pver "${pver}" \
		--pbuild "${pbuild}"

	## postremove scripts
	if [ -n "$(typeset -f postremove)" ]
	then
		echo -e " ${COLBLUE}***${COLDEFAULT} running postremove ... "
		postremove
		unset postremove
	fi

	# removes the database entry
	remove_database_entry \
		--pcat "${pcat}" \
		--pname "${pname}" \
		--pver "${pver}" \
		--pbuild "${pbuild}" \
		|| die "error in mage_uninstall() running remove_database_entry()."

	# rebuilds toplevel info node
	if [[ ${MAGE_INFO_REBUILD} = true ]]
	then
		echo -ne "${COLBLUE} *** ${COLDEFAULT}"
		echo -n "rebuilding top-level info node ... "
		${MLIBDIR}/mkinfodir ${MROOT}/usr/share/info \
			> ${MROOT}/usr/share/info/dir && \
			echo "done." || echo "failure."
		unset MAGE_INFO_REBUILD
	fi

	# rebuilds the enviroment with the content of /etc/env.d
	if [[ ${MAGE_ENV_REBUILD} = true ]]
	then
		echo -ne "${COLBLUE} *** ${COLDEFAULT}"
		echo -n "rebuilding environment ... "
		${MLIBDIR}/env-rebuild.sh > /dev/null && \
			echo "done." || echo "failure."
		unset MAGE_ENV_REBUILD
	fi

	echo -ne "${COLBLUE} --- ${COLDEFAULT}"
	echo -n "package "
# 	echo -ne "${COLBLUE}${pcat}/${COLDEFAULT}"
# 	echo -ne "${COLGREEN}${pname}-${pver}-${pbuild}${COLDEFAULT} "
	echo "successfully removed."

	# unset these functions
	unset -f preinstall
	unset -f postinstall
	unset -f preremove
	unset -f postremove
}

show_etc_update_mesg() {
	[ ${MAGE_PROTECT_COUNTER} -eq 0 ] && return 0

	echo
	echo -ne "${COLRED}"
	echo "Important:"
	echo -ne ${COLDEFAULT}
	echo "${MAGE_PROTECT_COUNTER} protected file(s) were installed."
	echo
	echo "Please run 'etc-update' to update your configuration files."
	echo
}

pkgsearch()
{
	local string="$1"
	local result
	local pkg
	local pcat
	local pname
	local magefile
	local pver
	local pbuild
	local state
	local descriptiom
	local homepage
	local i
	local all_installed
	local ipver
	local ipbuild

	# only names no versions
	result="$(find ${MAGEDIR} -mindepth 2 -maxdepth 2 -type d -name '*'${string}'*')"
	#result="$(find ${MAGEDIR} -type f -name '*'${string}'*'.mage | sort)"

	# nothing found
	[[ -z ${result} ]] && die "No package found containing '${string}' in the name."

	for pkg in ${result}
	do
		# dirty, but does the job
		pcat="$(magename2pcat ${pkg}/foo)"
		pname="$(magename2pname ${pkg}-foo-foo)"

		# get highest version available
		magefile=$(get_highest_magefile ${pcat} ${pname})

		# now get all needed infos to print a nice output
		pver="$(magename2pver ${magefile})"
		pbuild="$(magename2pbuild ${magefile})"
		state="$(get_value_from_magefile STATE ${magefile})"
		description="$(get_value_from_magefile DESCRIPTION ${magefile})"
		homepage="$(get_value_from_magefile HOMEPAGE ${magefile})"

		# all installed
		for i in $(get_uninstall_candidates --pname ${pname} --pcat ${pcat})
		do
			ipver="$(magename2pver ${i})"
			ipbuild="$(magename2pbuild ${i})"

			if [[ -z ${all_installed} ]]
			then
				all_installed="${ipver}-${ipbuild}"
			else
				all_installed="${all_installed} ${ipver}-${ipbuild}"
			fi
		done
		[[ -z ${all_installed} ]] && all_installed="none"

		case ${state} in
			stable) state=${COLGREEN}"[s] ";;
			testing) state=${COLYELLOW}"[t] ";;
			unstable) state=${COLRED}"[u] ";;
			old) state=${COLGRAY}"[o] ";;
		esac

		echo -e "${state}${pcat}/${pname}"${COLDEFAULT}
		echo "      Latest available:   ${pver}-${pbuild}"
		echo "      Installed versions: ${all_installed}"
		echo "      Description: ${description}"
		echo "      Homepage: ${homepage}"
		echo

		unset pcat
		unset pname
		unset magefile
		unset pver
		unset pbuild
		unset state
		unset descriptiom
		unset homepage
		unset all_installed
		unset ipver
		unset ipbuild
	done
}

export_inherits()
{
	local include="$1"
	shift

	while [ "$1" ]
	do
		local functions="$1"

		# sanity checks
		[ -z "${include}" ] && die "export_inherits(): \$include not given."
		[ -z "${functions}" ] && die "export_inherits(): \$functions not given."

		eval "${functions}() { ${include}_${functions} ; }"

		# debug
		[[ ${MAGEDEBUG} = on ]] && typeset -f "${functions}"

		shift
	done
}