eclass/java-vm-2.eclass - mirrors/cros/chromiumos/overlays/portage-stable - Git at Google

 # Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2

 # @ECLASS: java-vm-2.eclass
 # @MAINTAINER:
 # java@gentoo.org
 # @BLURB: Java Virtual Machine eclass
 # @DESCRIPTION:
 # This eclass provides functionality which assists with installing
 # virtual machines, and ensures that they are recognized by java-config.

 case ${EAPI:-0} in
 	5|6) ;;
 	*) die "EAPI=${EAPI} is not supported" ;;
 esac

 inherit fdo-mime multilib pax-utils prefix

 EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm pkg_postrm

 RDEPEND="
 	>=dev-java/java-config-2.2.0-r3
 	>=app-eselect/eselect-java-0.2.0"
 DEPEND="${RDEPEND}"

 export WANT_JAVA_CONFIG=2


 # @ECLASS-VARIABLE: JAVA_VM_CONFIG_DIR
 # @INTERNAL
 # @DESCRIPTION:
 # Where to place the vm env file.
 JAVA_VM_CONFIG_DIR="/usr/share/java-config-2/vm"

 # @ECLASS-VARIABLE: JAVA_VM_DIR
 # @INTERNAL
 # @DESCRIPTION:
 # Base directory for vm links.
 JAVA_VM_DIR="/usr/lib/jvm"

 # @ECLASS-VARIABLE: JAVA_VM_SYSTEM
 # @INTERNAL
 # @DESCRIPTION:
 # Link for system-vm
 JAVA_VM_SYSTEM="/etc/java-config-2/current-system-vm"

 # @ECLASS-VARIABLE: JAVA_VM_BUILD_ONLY
 # @DESCRIPTION:
 # Set to YES to mark a vm as build-only.
 JAVA_VM_BUILD_ONLY="${JAVA_VM_BUILD_ONLY:-FALSE}"


 # @FUNCTION: java-vm-2_pkg_setup
 # @DESCRIPTION:
 # default pkg_setup
 #
 # Initialize vm handle.

 java-vm-2_pkg_setup() {
 	if [[ "${SLOT}" != "0" ]]; then
 		VMHANDLE=${PN}-${SLOT}
 	else
 		VMHANDLE=${PN}
 	fi
 }


 # @FUNCTION: java-vm-2_pkg_postinst
 # @DESCRIPTION:
 # default pkg_postinst
 #
 # Set the generation-2 system VM, if it isn't set or the setting is
 # invalid. Also update mime database.

 java-vm-2_pkg_postinst() {
 	# Note that we cannot rely on java-config here, as it will silently recognize
 	# e.g. icedtea6-bin as valid system VM if icedtea6 is set but invalid (e.g. due
 	# to the migration to icedtea-6)
 	if [[ ! -L "${EROOT}${JAVA_VM_SYSTEM}" ]]; then
 		java_set_default_vm_
 	else
 		local current_vm_path=$(readlink "${EROOT}${JAVA_VM_SYSTEM}")
 		local current_vm=$(basename "${ROOT}${current_vm_path}")
 		if [[ ! -L "${EROOT}${JAVA_VM_DIR}/${current_vm}" ]]; then
 			java_set_default_vm_
 		fi
 	fi

 	fdo-mime_desktop_database_update
 }


 # @FUNCTION: java-vm-2_pkg_prerm
 # @DESCRIPTION:
 # default pkg_prerm
 #
 # Warn user if removing system-vm.

 java-vm-2_pkg_prerm() {
 	if [[ "$(GENTOO_VM="" java-config -f 2>/dev/null)" == "${VMHANDLE}" && -z "${REPLACED_BY_VERSION}" ]]; then
 		ewarn "It appears you are removing your system-vm!"
 		ewarn "Please run java-config -L to list available VMs,"
 		ewarn "then use java-config -S to set a new system-vm!"
 	fi
 }


 # @FUNCTION: java-vm-2_pkg_postrm
 # @DESCRIPTION:
 # default pkg_postrm
 #
 # Update mime database.

 java-vm-2_pkg_postrm() {
 	fdo-mime_desktop_database_update
 }


 # @FUNCTION: java_set_default_vm_
 # @INTERNAL
 # @DESCRIPTION:
 # Set system-vm.

 java_set_default_vm_() {
 	java-config-2 --set-system-vm="${VMHANDLE}"

 	einfo " ${P} set as the default system-vm."
 }


 # @FUNCTION: get_system_arch
 # @DESCRIPTION:
 # Get Java specific arch name.
 #
 # NOTE the mips and sparc values are best guesses. Oracle uses sparcv9
 # but does OpenJDK use sparc64? We don't support OpenJDK on sparc or any
 # JVM on mips though so it doesn't matter much.

 get_system_arch() {
 	local abi=${1-${ABI}}

 	case $(get_abi_CHOST ${abi}) in
 		mips*l*) echo mipsel ;;
 		mips*) echo mips ;;
 		ppc64le*) echo ppc64le ;;
 		*)
 			case ${abi} in
 				*_fbsd) get_system_arch ${abi%_fbsd} ;;
 				arm64) echo aarch64 ;;
 				hppa) echo parisc ;;
 				sparc32) echo sparc ;;
 				sparc64) echo sparcv9 ;;
 				x86*) echo i386 ;;
 				*) echo ${abi} ;;
 			esac ;;
 	esac
 }


 # @FUNCTION: set_java_env
 # @DESCRIPTION:
 # Installs a vm env file.
 # DEPRECATED, use java-vm_install-env instead.

 set_java_env() {
 	debug-print-function ${FUNCNAME} $*

 	local platform="$(get_system_arch)"
 	local env_file="${ED}${JAVA_VM_CONFIG_DIR}/${VMHANDLE}"

 	if [[ ${1} ]]; then
 		local source_env_file="${1}"
 	else
 		local source_env_file="${FILESDIR}/${VMHANDLE}.env"
 	fi

 	if [[ ! -f ${source_env_file} ]]; then
 		die "Unable to find the env file: ${source_env_file}"
 	fi

 	dodir ${JAVA_VM_CONFIG_DIR}
 	sed \
 		-e "s/@P@/${P}/g" \
 		-e "s/@PN@/${PN}/g" \
 		-e "s/@PV@/${PV}/g" \
 		-e "s/@PF@/${PF}/g" \
 		-e "s/@SLOT@/${SLOT}/g" \
 		-e "s/@PLATFORM@/${platform}/g" \
 		-e "s/@LIBDIR@/$(get_libdir)/g" \
 		-e "/^LDPATH=.*lib\\/\\\"/s|\"\\(.*\\)\"|\"\\1${platform}/:\\1${platform}/server/\"|" \
 		< "${source_env_file}" \
 		> "${env_file}" || die "sed failed"

 	(
 		echo "VMHANDLE=\"${VMHANDLE}\""
 		echo "BUILD_ONLY=\"${JAVA_VM_BUILD_ONLY}\""
 	) >> "${env_file}"

 	eprefixify ${env_file}

 	[[ -n ${JAVA_PROVIDE} ]] && echo "PROVIDES=\"${JAVA_PROVIDE}\"" >> ${env_file}

 	local java_home=$(source "${env_file}"; echo ${JAVA_HOME})
 	[[ -z ${java_home} ]] && die "No JAVA_HOME defined in ${env_file}"

 	# Make the symlink
 	dodir "${JAVA_VM_DIR}"
 	dosym ${java_home#${EPREFIX}} ${JAVA_VM_DIR}/${VMHANDLE}
 }


 # @FUNCTION: java-vm_install-env
 # @DESCRIPTION:
 #
 # Installs a Java VM environment file. The source can be specified but
 # defaults to ${FILESDIR}/${VMHANDLE}.env.sh.
 #
 # Environment variables within this file will be resolved. You should
 # escape the $ when referring to variables that should be resolved later
 # such as ${JAVA_HOME}. Subshells may be used but avoid using double
 # quotes. See icedtea-bin.env.sh for a good example.

 java-vm_install-env() {
 	debug-print-function ${FUNCNAME} "$*"

 	local env_file="${ED}${JAVA_VM_CONFIG_DIR}/${VMHANDLE}"
 	local source_env_file="${1-${FILESDIR}/${VMHANDLE}.env.sh}"

 	if [[ ! -f "${source_env_file}" ]]; then
 		die "Unable to find the env file: ${source_env_file}"
 	fi

 	dodir "${JAVA_VM_CONFIG_DIR}"

 	# Here be dragons! ;) -- Chewi
 	eval echo "\"$(cat <<< "$(sed 's:":\\":g' "${source_env_file}")")\"" > "${env_file}" ||
 		die "failed to create Java env file"

 	(
 		echo "VMHANDLE=\"${VMHANDLE}\""
 		echo "BUILD_ONLY=\"${JAVA_VM_BUILD_ONLY}\""
 		[[ ${JAVA_PROVIDE} ]] && echo "PROVIDES=\"${JAVA_PROVIDE}\"" || true
 	) >> "${env_file}" || die "failed to append to Java env file"

 	local java_home=$(unset JAVA_HOME; source "${env_file}"; echo ${JAVA_HOME})
 	[[ -z ${java_home} ]] && die "No JAVA_HOME defined in ${env_file}"

 	# Make the symlink
 	dodir "${JAVA_VM_DIR}"
 	dosym "${java_home#${EPREFIX}}" "${JAVA_VM_DIR}/${VMHANDLE}"
 }


 # @FUNCTION: java-vm_set-pax-markings
 # @DESCRIPTION:
 # Set PaX markings on all JDK/JRE executables to allow code-generation on
 # the heap by the JIT compiler.
 #
 # The markings need to be set prior to the first invocation of the the freshly
 # built / installed VM. Be it before creating the Class Data Sharing archive or
 # generating cacerts. Otherwise a PaX enabled kernel will kill the VM.
 # Bug #215225 #389751
 #
 # @CODE
 #   Parameters:
 #     $1 - JDK/JRE base directory.
 #
 #   Examples:
 #     java-vm_set-pax-markings "${S}"
 #     java-vm_set-pax-markings "${ED}"/opt/${P}
 # @CODE

 java-vm_set-pax-markings() {
 	debug-print-function ${FUNCNAME} "$*"
 	[[ $# -ne 1 ]] && die "${FUNCNAME}: takes exactly one argument"
 	[[ ! -f "${1}"/bin/java ]] \
 		&& die "${FUNCNAME}: argument needs to be JDK/JRE base directory"

 	local executables=( "${1}"/bin/* )
 	[[ -d "${1}"/jre ]] && executables+=( "${1}"/jre/bin/* )

 	# Usually disabling MPROTECT is sufficient.
 	local pax_markings="m"
 	# On x86 for heap sizes over 700MB disable SEGMEXEC and PAGEEXEC as well.
 	use x86 && pax_markings+="sp"

 	pax-mark ${pax_markings} $(list-paxables "${executables[@]}")
 }


 # @FUNCTION: java-vm_revdep-mask
 # @DESCRIPTION:
 # Installs a revdep-rebuild control file which SEARCH_DIR_MASK set to the path
 # where the VM is installed. Prevents pointless rebuilds - see bug #177925.
 # Also gives a notice to the user.
 #
 # @CODE
 #   Parameters:
 #     $1 - Path of the VM (defaults to /opt/${P} if not set)
 #
 #   Examples:
 #     java-vm_revdep-mask
 #     java-vm_revdep-mask /path/to/jdk/
 #
 # @CODE

 java-vm_revdep-mask() {
 	debug-print-function ${FUNCNAME} "$*"

 	local VMROOT="${1-"${EPREFIX}"/opt/${P}}"

 	dodir /etc/revdep-rebuild
 	echo "SEARCH_DIRS_MASK=\"${VMROOT}\"" >> "${ED}/etc/revdep-rebuild/61-${VMHANDLE}" \
 		 || die "Failed to write revdep-rebuild mask file"
 }


 # @FUNCTION: java-vm_sandbox-predict
 # @DESCRIPTION:
 # Install a sandbox control file. Specified paths won't cause a sandbox
 # violation if opened read write but no write takes place. See bug 388937#c1
 #
 # @CODE
 #   Examples:
 #     java-vm_sandbox-predict /dev/random /proc/self/coredump_filter
 # @CODE

 java-vm_sandbox-predict() {
 	debug-print-function ${FUNCNAME} "$*"
 	[[ -z "${1}" ]] && die "${FUNCNAME} takes at least one argument"

 	local path path_arr=("$@")
 	# subshell this to prevent IFS bleeding out dependant on bash version.
 	# could use local, which *should* work, but that requires a lot of testing.
 	path=$(IFS=":"; echo "${path_arr[*]}")
 	dodir /etc/sandbox.d
 	echo "SANDBOX_PREDICT=\"${path}\"" > "${ED}/etc/sandbox.d/20${VMHANDLE}" \
 		|| die "Failed to write sandbox control file"
 }
	# Copyright 1999-2017 Gentoo Foundation
	# Distributed under the terms of the GNU General Public License v2

	# @ECLASS: java-vm-2.eclass
	# @MAINTAINER:
	# java@gentoo.org
	# @BLURB: Java Virtual Machine eclass
	# @DESCRIPTION:
	# This eclass provides functionality which assists with installing
	# virtual machines, and ensures that they are recognized by java-config.

	case ${EAPI:-0} in
	5\|6) ;;
	*) die "EAPI=${EAPI} is not supported" ;;
	esac

	inherit fdo-mime multilib pax-utils prefix

	EXPORT_FUNCTIONS pkg_setup pkg_postinst pkg_prerm pkg_postrm

	RDEPEND="
	>=dev-java/java-config-2.2.0-r3
	>=app-eselect/eselect-java-0.2.0"
	DEPEND="${RDEPEND}"

	export WANT_JAVA_CONFIG=2


	# @ECLASS-VARIABLE: JAVA_VM_CONFIG_DIR
	# @INTERNAL
	# @DESCRIPTION:
	# Where to place the vm env file.
	JAVA_VM_CONFIG_DIR="/usr/share/java-config-2/vm"

	# @ECLASS-VARIABLE: JAVA_VM_DIR
	# @INTERNAL
	# @DESCRIPTION:
	# Base directory for vm links.
	JAVA_VM_DIR="/usr/lib/jvm"

	# @ECLASS-VARIABLE: JAVA_VM_SYSTEM
	# @INTERNAL
	# @DESCRIPTION:
	# Link for system-vm
	JAVA_VM_SYSTEM="/etc/java-config-2/current-system-vm"

	# @ECLASS-VARIABLE: JAVA_VM_BUILD_ONLY
	# @DESCRIPTION:
	# Set to YES to mark a vm as build-only.
	JAVA_VM_BUILD_ONLY="${JAVA_VM_BUILD_ONLY:-FALSE}"


	# @FUNCTION: java-vm-2_pkg_setup
	# @DESCRIPTION:
	# default pkg_setup
	#
	# Initialize vm handle.

	java-vm-2_pkg_setup() {
	if [[ "${SLOT}" != "0" ]]; then
	VMHANDLE=${PN}-${SLOT}
	else
	VMHANDLE=${PN}
	fi
	}


	# @FUNCTION: java-vm-2_pkg_postinst
	# @DESCRIPTION:
	# default pkg_postinst
	#
	# Set the generation-2 system VM, if it isn't set or the setting is
	# invalid. Also update mime database.

	java-vm-2_pkg_postinst() {
	# Note that we cannot rely on java-config here, as it will silently recognize
	# e.g. icedtea6-bin as valid system VM if icedtea6 is set but invalid (e.g. due
	# to the migration to icedtea-6)
	if [[ ! -L "${EROOT}${JAVA_VM_SYSTEM}" ]]; then
	java_set_default_vm_
	else
	local current_vm_path=$(readlink "${EROOT}${JAVA_VM_SYSTEM}")
	local current_vm=$(basename "${ROOT}${current_vm_path}")
	if [[ ! -L "${EROOT}${JAVA_VM_DIR}/${current_vm}" ]]; then
	java_set_default_vm_
	fi
	fi

	fdo-mime_desktop_database_update
	}


	# @FUNCTION: java-vm-2_pkg_prerm
	# @DESCRIPTION:
	# default pkg_prerm
	#
	# Warn user if removing system-vm.

	java-vm-2_pkg_prerm() {
	if [[ "$(GENTOO_VM="" java-config -f 2>/dev/null)" == "${VMHANDLE}" && -z "${REPLACED_BY_VERSION}" ]]; then
	ewarn "It appears you are removing your system-vm!"
	ewarn "Please run java-config -L to list available VMs,"
	ewarn "then use java-config -S to set a new system-vm!"
	fi
	}


	# @FUNCTION: java-vm-2_pkg_postrm
	# @DESCRIPTION:
	# default pkg_postrm
	#
	# Update mime database.

	java-vm-2_pkg_postrm() {
	fdo-mime_desktop_database_update
	}


	# @FUNCTION: java_set_default_vm_
	# @INTERNAL
	# @DESCRIPTION:
	# Set system-vm.

	java_set_default_vm_() {
	java-config-2 --set-system-vm="${VMHANDLE}"

	einfo " ${P} set as the default system-vm."
	}


	# @FUNCTION: get_system_arch
	# @DESCRIPTION:
	# Get Java specific arch name.
	#
	# NOTE the mips and sparc values are best guesses. Oracle uses sparcv9
	# but does OpenJDK use sparc64? We don't support OpenJDK on sparc or any
	# JVM on mips though so it doesn't matter much.

	get_system_arch() {
	local abi=${1-${ABI}}

	case $(get_abi_CHOST ${abi}) in
	mipsl) echo mipsel ;;
	mips*) echo mips ;;
	ppc64le*) echo ppc64le ;;
	*)
	case ${abi} in
	*_fbsd) get_system_arch ${abi%_fbsd} ;;
	arm64) echo aarch64 ;;
	hppa) echo parisc ;;
	sparc32) echo sparc ;;
	sparc64) echo sparcv9 ;;
	x86*) echo i386 ;;
	*) echo ${abi} ;;
	esac ;;
	esac
	}


	# @FUNCTION: set_java_env
	# @DESCRIPTION:
	# Installs a vm env file.
	# DEPRECATED, use java-vm_install-env instead.

	set_java_env() {
	debug-print-function ${FUNCNAME} $*

	local platform="$(get_system_arch)"
	local env_file="${ED}${JAVA_VM_CONFIG_DIR}/${VMHANDLE}"

	if [[ ${1} ]]; then
	local source_env_file="${1}"
	else
	local source_env_file="${FILESDIR}/${VMHANDLE}.env"
	fi

	if [[ ! -f ${source_env_file} ]]; then
	die "Unable to find the env file: ${source_env_file}"
	fi

	dodir ${JAVA_VM_CONFIG_DIR}
	sed \
	-e "s/@P@/${P}/g" \
	-e "s/@PN@/${PN}/g" \
	-e "s/@PV@/${PV}/g" \
	-e "s/@PF@/${PF}/g" \
	-e "s/@SLOT@/${SLOT}/g" \
	-e "s/@PLATFORM@/${platform}/g" \
	-e "s/@LIBDIR@/$(get_libdir)/g" \
	-e "/^LDPATH=.lib\\/\\\"/s\|\"\\(.\\)\"\|\"\\1${platform}/:\\1${platform}/server/\"\|" \
	< "${source_env_file}" \
	> "${env_file}" \|\| die "sed failed"

	(
	echo "VMHANDLE=\"${VMHANDLE}\""
	echo "BUILD_ONLY=\"${JAVA_VM_BUILD_ONLY}\""
	) >> "${env_file}"

	eprefixify ${env_file}

	[[ -n ${JAVA_PROVIDE} ]] && echo "PROVIDES=\"${JAVA_PROVIDE}\"" >> ${env_file}

	local java_home=$(source "${env_file}"; echo ${JAVA_HOME})
	[[ -z ${java_home} ]] && die "No JAVA_HOME defined in ${env_file}"

	# Make the symlink
	dodir "${JAVA_VM_DIR}"
	dosym ${java_home#${EPREFIX}} ${JAVA_VM_DIR}/${VMHANDLE}
	}


	# @FUNCTION: java-vm_install-env
	# @DESCRIPTION:
	#
	# Installs a Java VM environment file. The source can be specified but
	# defaults to ${FILESDIR}/${VMHANDLE}.env.sh.
	#
	# Environment variables within this file will be resolved. You should
	# escape the $ when referring to variables that should be resolved later
	# such as ${JAVA_HOME}. Subshells may be used but avoid using double
	# quotes. See icedtea-bin.env.sh for a good example.

	java-vm_install-env() {
	debug-print-function ${FUNCNAME} "$*"

	local env_file="${ED}${JAVA_VM_CONFIG_DIR}/${VMHANDLE}"
	local source_env_file="${1-${FILESDIR}/${VMHANDLE}.env.sh}"

	if [[ ! -f "${source_env_file}" ]]; then
	die "Unable to find the env file: ${source_env_file}"
	fi

	dodir "${JAVA_VM_CONFIG_DIR}"

	# Here be dragons! ;) -- Chewi
	eval echo "\"$(cat <<< "$(sed 's:":\\":g' "${source_env_file}")")\"" > "${env_file}" \|\|
	die "failed to create Java env file"

	(
	echo "VMHANDLE=\"${VMHANDLE}\""
	echo "BUILD_ONLY=\"${JAVA_VM_BUILD_ONLY}\""
	[[ ${JAVA_PROVIDE} ]] && echo "PROVIDES=\"${JAVA_PROVIDE}\"" \|\| true
	) >> "${env_file}" \|\| die "failed to append to Java env file"

	local java_home=$(unset JAVA_HOME; source "${env_file}"; echo ${JAVA_HOME})
	[[ -z ${java_home} ]] && die "No JAVA_HOME defined in ${env_file}"

	# Make the symlink
	dodir "${JAVA_VM_DIR}"
	dosym "${java_home#${EPREFIX}}" "${JAVA_VM_DIR}/${VMHANDLE}"
	}


	# @FUNCTION: java-vm_set-pax-markings
	# @DESCRIPTION:
	# Set PaX markings on all JDK/JRE executables to allow code-generation on
	# the heap by the JIT compiler.
	#
	# The markings need to be set prior to the first invocation of the the freshly
	# built / installed VM. Be it before creating the Class Data Sharing archive or
	# generating cacerts. Otherwise a PaX enabled kernel will kill the VM.
	# Bug #215225 #389751
	#
	# @CODE
	# Parameters:
	# $1 - JDK/JRE base directory.
	#
	# Examples:
	# java-vm_set-pax-markings "${S}"
	# java-vm_set-pax-markings "${ED}"/opt/${P}
	# @CODE

	java-vm_set-pax-markings() {
	debug-print-function ${FUNCNAME} "$*"
	[[ $# -ne 1 ]] && die "${FUNCNAME}: takes exactly one argument"
	[[ ! -f "${1}"/bin/java ]] \
	&& die "${FUNCNAME}: argument needs to be JDK/JRE base directory"

	local executables=( "${1}"/bin/* )
	[[ -d "${1}"/jre ]] && executables+=( "${1}"/jre/bin/* )

	# Usually disabling MPROTECT is sufficient.
	local pax_markings="m"
	# On x86 for heap sizes over 700MB disable SEGMEXEC and PAGEEXEC as well.
	use x86 && pax_markings+="sp"

	pax-mark ${pax_markings} $(list-paxables "${executables[@]}")
	}


	# @FUNCTION: java-vm_revdep-mask
	# @DESCRIPTION:
	# Installs a revdep-rebuild control file which SEARCH_DIR_MASK set to the path
	# where the VM is installed. Prevents pointless rebuilds - see bug #177925.
	# Also gives a notice to the user.
	#
	# @CODE
	# Parameters:
	# $1 - Path of the VM (defaults to /opt/${P} if not set)
	#
	# Examples:
	# java-vm_revdep-mask
	# java-vm_revdep-mask /path/to/jdk/
	#
	# @CODE

	java-vm_revdep-mask() {
	debug-print-function ${FUNCNAME} "$*"

	local VMROOT="${1-"${EPREFIX}"/opt/${P}}"

	dodir /etc/revdep-rebuild
	echo "SEARCH_DIRS_MASK=\"${VMROOT}\"" >> "${ED}/etc/revdep-rebuild/61-${VMHANDLE}" \
	\|\| die "Failed to write revdep-rebuild mask file"
	}


	# @FUNCTION: java-vm_sandbox-predict
	# @DESCRIPTION:
	# Install a sandbox control file. Specified paths won't cause a sandbox
	# violation if opened read write but no write takes place. See bug 388937#c1
	#
	# @CODE
	# Examples:
	# java-vm_sandbox-predict /dev/random /proc/self/coredump_filter
	# @CODE

	java-vm_sandbox-predict() {
	debug-print-function ${FUNCNAME} "$*"
	[[ -z "${1}" ]] && die "${FUNCNAME} takes at least one argument"

	local path path_arr=("$@")
	# subshell this to prevent IFS bleeding out dependant on bash version.
	# could use local, which should work, but that requires a lot of testing.
	path=$(IFS=":"; echo "${path_arr[*]}")
	dodir /etc/sandbox.d
	echo "SANDBOX_PREDICT=\"${path}\"" > "${ED}/etc/sandbox.d/20${VMHANDLE}" \
	\|\| die "Failed to write sandbox control file"
	}