safer, simpler error handling in lbmk

in shell scripts, a function named the same as a program included in
the $PATH will override that program. for example, you could make a
function called ls() and this would override the standand "ls".

in lbmk, a part of it was first trying to run the "fail" command,
deferring to "err", because some scripts call fail() which does
some minor cleanup before calling err.

in most cases, fail() is not defined, and it's possible that the user
could have a program called "fail" in their $PATH, the behaviour of
which we could not determine, and it could have disastrous effects.

lbmk error handling has been re-engineered in such a way that the
err function is defined in a variable, which defaults to err_ which
calls err_, so defined under include/err.sh.

in functions that require cleanup prior to error handling, a fail()
function is still defined, and err is overridden, thus:

err="fail"

this change has made xx_() obsolete, so now only x_ is used. the x_
function is a wrapper that can be used to run a command and exit with
non-zero status (from lbmk) if the command fails. the xx_ command
did the same thing, but called fail() which would have called err();
now everything is $err

example:

	rm -f "$filename" || err "could not delete file"

this would now be:

	rm -f "$filename" || $err "could not delete file"

overriding of err= must be done *after* including err.sh. for
example:

err="fail"
. "include/err.sh"

^ this is wrong. instead, one must do:

. "include/err.sh"
err="fail"

this is because err is set as a global variable under err.sh

the new error handling is much cleaner, and safer. it also reduces
the chance of mistakes such as: calling err when you meant to
call fail. this is because the standard way is now to call $err,
so you set err="fail" at the top of the script and all is well.

Signed-off-by: Leah Rowe <leah@libreboot.org>

6 files changed, 131 insertions, 131 deletions

diff --git a/script/build/roms b/script/build/roms
index 9e7c69ee..a90e1daa 100755
--- a/script/build/roms
+++ b/script/build/roms
@@ -49,7 +49,7 @@ main()
 	done
 
 	[ "${all}" != "y" ] || boards=$(items config/coreboot) || \
-	    err "Cannot generate list of boards for building"
+	    $err "Cannot generate list of boards for building"
 
 	for x in ${boards}; do
 		eval "$(setvars "n" ${pv}) $(setvars "" ${v})"
@@ -62,7 +62,7 @@ main()
 		targets="* bin/${board}\n${targets}"
 	done
 
-	[ -z "${targets}" ] && err "No ROM images were compiled"
+	[ -z "${targets}" ] && $err "No ROM images were compiled"
 	printf "\nROM images available in these directories:\n"
 	eval "printf \"${targets}\""
 	printf "^^ ROM images available in these directories.\n\n"
@@ -74,7 +74,7 @@ configure_target()
 {
 	targetdir="${cfgsdir}/${board}"
 	[ -f "${targetdir}/target.cfg" ] || \
-		err "Missing target.cfg for target: ${board}"
+		$err "Missing target.cfg for target: ${board}"
 
 	# Override the above defaults using target.cfg
 	. "${targetdir}/target.cfg"
@@ -84,7 +84,7 @@ configure_target()
 	    && [ "${grub_scan_disk}" != "ahci" ] && \
 		grub_scan_disk="both"
 
-	[ -z "$tree" ] && err "$board: tree not defined"
+	[ -z "$tree" ] && $err "$board: tree not defined"
 
 	[ "${payload_memtest}" != "y" ] && payload_memtest="n"
 	[ "${payload_grub_withseabios}" = "y" ] && payload_grub="y"
@@ -101,7 +101,7 @@ configure_target()
 	    [ "${payload_uboot}" != "y" ] && \
 		for configfile in "${targetdir}/config/"*; do
 			[ -e "${configfile}" ] || continue
-			err "target '${board}' defines no payload"
+			$err "target '${board}' defines no payload"
 		done
 
 	[ "$payload_uboot" != "n" ] && [ "$payload_uboot" != "y" ] && \
@@ -149,7 +149,7 @@ build_grub_payload()
 		keymaps="${keymaps} ${keymapfile}"
 	done
 	[ -z "$_keyboard" ] || [ -f "$grubcfgsdir/keymap/$_keyboard.gkb" ] || \
-		err "build_grub_payload: $_keyboard layout not defined"
+		$err "build_grub_payload: $_keyboard layout not defined"
 	[ -n "$_keyboard" ] && keymaps="${grubcfgsdir}/keymap/${_keyboard}.gkb"
 	[ -f "$grubelf" ] && return 0
 	[ -f "src/grub/grub-mkstandalone" ] || x_ ./update trees -b grub
@@ -164,7 +164,7 @@ build_grub_payload()
 	    --install-modules="${grub_install_modules}" \
 	    "/boot/grub/grub.cfg=${grubcfgsdir}/config/grub_memdisk.cfg" \
 	    "/boot/grub/grub_default.cfg=${grubcfgsdir}/config/grub.cfg" || \
-	    err "could not generate grub.elf"
+	    $err "could not generate grub.elf"
 }
 
 build_uboot_payload()
@@ -175,12 +175,12 @@ build_uboot_payload()
 	[ ! -f "${ubootelf}" ] && [ -f "${ubdir}/u-boot" ] && \
 		ubootelf="${ubdir}/u-boot"
 	[ -f "${ubootelf}" ] && return 0
-	err "Can't find u-boot build for board, $board";
+	$err "Can't find u-boot build for board, $board";
 }
 
 build_target_mainboard()
 {
-	rm -f "${romdir}/"* || err "!prepare, rm files, ${romdir}"
+	rm -f "${romdir}/"* || $err "!prepare, rm files, ${romdir}"
 
 	for x in "normal" "vgarom" "libgfxinit"; do
 		initmode="${x}"
@@ -237,7 +237,7 @@ build_seabios_roms()
 		x_ build_grub_roms "${t}" "seabios_withgrub"
 	else
 		t=$(mkSeabiosRom "${cbrom}" "fallback/payload") || \
-		    err "build_seabios_roms: cannot build tmprom"
+		    $err "build_seabios_roms: cannot build tmprom"
 		newrom="${romdir}/seabios_${board}_${initmode}_${displaymode}"
 		[ "${initmode}" = "normal" ] && newrom="${romdir}/seabios" \
 			&& newrom="${newrom}_${board}_${initmode}"
@@ -256,13 +256,13 @@ build_grub_roms()
 	if [ "$payload1" = "grub" ] && [ "$payload_grub_withseabios" = "y" ]
 	then
 		_tmpmvrom=$(mkSeabiosRom "$tmprom" "seabios.elf") || \
-		    err "build_grub_roms 1 $board: can't build tmprom"
+		    $err "build_grub_roms 1 $board: can't build tmprom"
 		x_ mv "$_tmpmvrom" "$tmprom"
 	elif [ "$payload1" != "grub" ] && [ "$payload_seabios_withgrub" = "y" ]
 	then
 		grub_cbfs="img/grub2"
 		_tmpmvrom=$(mkSeabiosRom "$tmprom" fallback/payload) || \
-		    err "build_grub_roms 2 $board: can't build tmprom"
+		    $err "build_grub_roms 2 $board: can't build tmprom"
 		x_ mv "$_tmpmvrom" "$tmprom"
 	fi
 
@@ -276,16 +276,16 @@ build_grub_roms()
 		backgroundfile="config/grub/background/${grub_background}"
 		"${cbfstool}" "${tmprom}" add -f ${backgroundfile} \
 		    -n background.png -t raw || \
-		    err "insert background, ${backgroundfile}"
+		    $err "insert background, ${backgroundfile}"
 	fi
 
 	tmpcfg=$(mktemp -t coreboot_rom.XXXXXXXXXX)
 	printf "set grub_scan_disk=\"%s\"\n" "$grub_scan_disk" >"$tmpcfg" \
-	    || err "set grub_scandisk, $grub_scan_disk, $tmpcfg"
+	    || $err "set grub_scandisk, $grub_scan_disk, $tmpcfg"
 	[ "${grub_scan_disk}" = "both" ] || \
 	    x_ "$cbfstool" "$tmprom" add -f "$tmpcfg" -n scan.cfg -t raw
 	printf "set timeout=%s\n" "${grub_timeout}" > "${tmpcfg}" || \
-	    err "set timeout, ${grub_timeout}, ${tmpcfg}"
+	    $err "set timeout, ${grub_timeout}, ${tmpcfg}"
 	[ -z "${grub_timeout}" ] || x_ "${cbfstool}" "${tmprom}" add \
 	    -f "${tmpcfg}" -n timeout.cfg -t raw
 	x_ rm -f "${tmpcfg}"
@@ -344,7 +344,7 @@ mkSeabiosGrubonlyRom()
 	tmpbootorder=$(mktemp -t coreboot_rom.XXXXXXXXXX)
 
 	# only load grub, by inserting a custom bootorder file
-	printf "/rom@img/grub2\n" > "$tmpbootorder" || err "printf bootorder"
+	printf "/rom@img/grub2\n" > "$tmpbootorder" || $err "printf bootorder"
 	x_ "${cbfstool}" "${_grubrom}" \
 	    add -f "${tmpbootorder}" -n bootorder -t raw
 	x_ rm -f "${tmpbootorder}"
@@ -356,7 +356,7 @@ mkSeabiosGrubonlyRom()
 build_uboot_roms()
 {
 	tmprom=$(mkUbootRom "${cbrom}" "fallback/payload") || \
-	    err "build_uboot_roms $board: could not create tmprom"
+	    $err "build_uboot_roms $board: could not create tmprom"
 	newrom="${romdir}/uboot_payload_${board}_${initmode}_${displaymode}.rom"
 	x_ moverom "${tmprom}" "${newrom}"
 	x_ rm -f "${tmprom}"
@@ -370,7 +370,7 @@ mkUbootRom() {
 	_ubdir="elf/u-boot/${board}/${uboot_config}"
 	_ubootelf="${_ubdir}/u-boot.elf"
 	[ -f "${_ubootelf}" ] || _ubootelf="${_ubdir}/u-boot"
-	[ -f "$_ubootelf" ] || err "mkUbootRom: $board: cant find u-boot"
+	[ -f "$_ubootelf" ] || $err "mkUbootRom: $board: cant find u-boot"
 
 	tmprom=$(mktemp -t coreboot_rom.XXXXXXXXXX)
 
diff --git a/script/build/serprog b/script/build/serprog
index 8b003add..ea2c02bf 100755
--- a/script/build/serprog
+++ b/script/build/serprog
@@ -17,8 +17,8 @@ usage="usage: ./build firmware serprog <rp2040|stm32> [board]"
 
 main()
 {
-	[ -z "${1+x}" ] && err "${usage}"
-	[ "$1" != "rp2040" ] && [ "$1" != "stm32" ] && err "$usage"
+	[ -z "${1+x}" ] && $err "${usage}"
+	[ "$1" != "rp2040" ] && [ "$1" != "stm32" ] && $err "$usage"
 	if [ "${1}" = "rp2040" ]; then
 		boards_dir=${pico_sdk_dir}/src/boards/include/boards
 		[ -d "$pico_src_dir" ] || x_ ./update trees -f "pico-serprog"
@@ -71,7 +71,7 @@ print_boards()
 
 list_boards()
 {
-	basename -a -s .h "${1}/"*.h || err "list_boards $1: can't list boards"
+	basename -a -s .h "${1}/"*.h || $err "list_boards $1: can't list boards"
 }
 
 main $@
diff --git a/script/update/release b/script/update/release
index 357840c2..c4101b5a 100755
--- a/script/update/release
+++ b/script/update/release
@@ -13,11 +13,11 @@ main()
 {
 	vdir="release"
 	while getopts d:m: option; do
-		[ -z "${OPTARG}" ] && err "Empty argument not allowed"
+		[ -z "${OPTARG}" ] && $err "Empty argument not allowed"
 		case "${option}" in
 		d) vdir="${OPTARG}" ;;
 		m) mode="${OPTARG}" ;;
-		*) err "Invalid option" ;;
+		*) $err "Invalid option" ;;
 		esac
 	done
 
@@ -29,7 +29,7 @@ main()
 	src_dirname="${relname}_src"
 	srcdir="${vdir}/${src_dirname}"
 
-	[ -e "${vdir}" ] && err "already exists: \"${vdir}\""
+	[ -e "${vdir}" ] && $err "already exists: \"${vdir}\""
 
 	mkvdir
 	build_release
@@ -39,45 +39,45 @@ main()
 
 mkvdir()
 {
-	mkdir -p "${vdir}" || err "mkvdir: !mkdir -p \"${vdir}\""
-	git clone . "${srcdir}" || err "mkdir: !gitclone \"${srcdir}\""
-	insert_version_files "$srcdir" || err "mkvdir $srcdir: versionfile"
+	mkdir -p "${vdir}" || $err "mkvdir: !mkdir -p \"${vdir}\""
+	git clone . "${srcdir}" || $err "mkdir: !gitclone \"${srcdir}\""
+	insert_version_files "$srcdir" || $err "mkvdir $srcdir: versionfile"
 }
 
 build_release()
 {
 	_xm="build_release ${vdir}"
 	(
-	cd "${srcdir}" || err "${_xm}: !cd \"${srcdir}\""
+	cd "${srcdir}" || $err "${_xm}: !cd \"${srcdir}\""
 	fetch_trees
 	[ "${mode}" = "u-boot" ] || x_ mv src/docs docs
-	) || err "can't create release files"
+	) || $err "can't create release files"
 
 	git log --graph --pretty=format:'%Cred%h%Creset %s %Creset' \
 	    --abbrev-commit > "${srcdir}/CHANGELOG" || \
-	    err "build_release $srcdir: couldn't generate changelog"
+	    $err "build_release $srcdir: couldn't generate changelog"
 
 	(
 	if [ "${mode}" = "u-boot" ]; then
-		cd "${srcdir}/src/" || err "${_xm}: mktarball \"${srcdir}\""
+		cd "${srcdir}/src/" || $err "${_xm}: mktarball \"${srcdir}\""
 		mktarball u-boot "../../${srcdir##*/}.tar.xz" || \
-		    err "$_xm: mksrc"
+		    $err "$_xm: mksrc"
 		# make a src archive containing only u-boot
 	else
-		cd "${srcdir%/*}" || err "${_xm}: mktarball \"${srcdir}\""
+		cd "${srcdir%/*}" || $err "${_xm}: mktarball \"${srcdir}\""
 		mktarball "${srcdir##*/}" "${srcdir##*/}.tar.xz" || \
-		    err "$_xm: mksrc"
+		    $err "$_xm: mksrc"
 	fi
-	) || err "can't create src tarball"
+	) || $err "can't create src tarball"
 	[ "${mode}" = "src" ] && return 0
 	[ "${mode}" = "u-boot" ] && return 0
 
 	(
-	cd "${srcdir}" || err "${_xm}: 2 !cd \"${srcdir}\""
+	cd "${srcdir}" || $err "${_xm}: 2 !cd \"${srcdir}\""
 	mkrom_images
-	) || err "can't build rom images"
+	) || $err "can't build rom images"
 
-	rm -Rf "${srcdir}" || err "!rm -Rf ${srcdir}"
+	rm -Rf "${srcdir}" || $err "!rm -Rf ${srcdir}"
 }
 
 fetch_trees()
@@ -85,7 +85,7 @@ fetch_trees()
 	for x in config/git/*; do
 		[ "${mode}" = "u-boot" ] && break
 		[ ! -f "${x}" ] || ./update trees -f "${x#config/git/}" || \
-		    err "${_xm}: fetch ${x#config/git/}"
+		    $err "${_xm}: fetch ${x#config/git/}"
 	done
 	[ "${mode}" = "u-boot" ] && x_ ./update trees -f u-boot
 
@@ -93,56 +93,56 @@ fetch_trees()
 		[ -f "${x}" ] || continue
 		xp="${x#*/}"; xp="${xp%/*}"
 		[ -L "${xp}" ] || rm -Rf "src/${xp}/${xp}" || \
-		    err "!rm -Rf \"src/${xp}/${xp}\""
+		    $err "!rm -Rf \"src/${xp}/${xp}\""
 	done
 
-	find . -name ".git" -exec rm -Rf {} + || err "$_xm: rm .git"
-	find . -name ".gitmodules" -exec rm -Rf {} + || err "$_xm: rm .gitmod"
+	find . -name ".git" -exec rm -Rf {} + || $err "$_xm: rm .git"
+	find . -name ".gitmodules" -exec rm -Rf {} + || $err "$_xm: rm .gitmod"
 	x_ rm -Rf tmp .git
 }
 
 mkrom_images()
 {
-	./build roms all || err "${_xm}: roms-all"
-	./build serprog rp2040 || err "${_xm}: rp2040"
-	./build serprog stm32 || err "${_xm}: stm32"
+	./build roms all || $err "${_xm}: roms-all"
+	./build serprog rp2040 || $err "${_xm}: rp2040"
+	./build serprog stm32 || $err "${_xm}: stm32"
 
 	for rombuild in bin/*; do
 		[ -d "${rombuild}" ] || continue
 		handle_rom_archive "${rombuild}"
 	done
 
-	mv "release/${version}/roms/" ../roms || err "${_xm}: copy roms/"
+	mv "release/${version}/roms/" ../roms || $err "${_xm}: copy roms/"
 }
 
 handle_rom_archive()
 {
 	builddir="${1}"
 	romdir="tmp/romdir"
-	rm -Rf "${romdir}" || err "!rm romdir, handle_rom_archive"
+	rm -Rf "${romdir}" || $err "!rm romdir, handle_rom_archive"
 	target="${builddir##*/}"
 
 	if [ ! -f "config/coreboot/${target}/target.cfg" ]; then
 		# No config, just make a tarball
 		tarball="release/${version}/roms/${relname}_${target}.tar.xz"
 		insert_copying_files "${builddir}" || \
-		    err "!insert copy, handle, ${builddir}"
+		    $err "!insert copy, handle, ${builddir}"
 		mktarball "${builddir}" "${tarball}"
 		return 0
 	fi
 
 	romdir="${romdir}/bin/${target}"
-	mkdir -p "${romdir}" || err "!mkdir -p romdir, handle_rom_archive"
-	cp "$builddir/"* "$romdir" || err "!cp romdir, handle_rom_archive"
+	mkdir -p "${romdir}" || $err "!mkdir -p romdir, handle_rom_archive"
+	cp "$builddir/"* "$romdir" || $err "!cp romdir, handle_rom_archive"
 
 	nukerom
 
 	printf "Generating release/%s/roms/%s-%s_%s.tar.xz\n" \
 	    "${version}" "${projectname}" "${version}" "${target##*/}"
 	insert_version_files "${romdir}" || \
-	    err "mkrom_tarball ${romdir}: versionfile"
+	    $err "mkrom_tarball ${romdir}: versionfile"
 
-	insert_copying_files "$romdir" || err "!insert copy, handle 2, $romdir"
+	insert_copying_files "$romdir" || $err "!insert copy, handle 2, $romdir"
 	mkrom_tarball
 }
 
@@ -152,18 +152,18 @@ nukerom()
 
 	# Hash the images before removing vendor files
 	# which "./vendor inject" uses for verification
-	rm -f "${romdir}/vendorhashes" || err "!rm ${romdir}/vendorhashes"
-	touch "${romdir}/vendorhashes" || err "!touch ${romdir}/vendorhashes"
+	rm -f "${romdir}/vendorhashes" || $err "!rm ${romdir}/vendorhashes"
+	touch "${romdir}/vendorhashes" || $err "!touch ${romdir}/vendorhashes"
 	(
-	cd "${romdir}" || err "!cd romdir ${romdir}, nukerom"
+	cd "${romdir}" || $err "!cd romdir ${romdir}, nukerom"
 	sha512sum ./*.rom >> vendorhashes || \
-	    err "!create vendorhashes, nukerom"
-	) || err "can't create vendor hashes"
+	    $err "!create vendorhashes, nukerom"
+	) || $err "can't create vendor hashes"
 
 	for romfile in "${romdir}"/*.rom; do
 		[ -f "${romfile}" ] || continue
 		./vendor inject -r "$romfile" -b "$target" -n nuke || \
-		    err "!vendor inject (nuke) ${romfile}, nukerom"
+		    $err "!vendor inject (nuke) ${romfile}, nukerom"
 	done
 }
 
@@ -188,13 +188,13 @@ mkrom_tarball()
 {
 	archivename="${relname}_${target##*/}"
 	f="release/${version}/roms/${archivename}"
-	mkdir -p "${f%/*}" || err "mkrom_tarball: !mkdir -p ${f%/*}"
+	mkdir -p "${f%/*}" || $err "mkrom_tarball: !mkdir -p ${f%/*}"
 	(
-	cd "${romdir%"/bin/$target"}" || err "!cd ${romdir%"/bin/$target"}"
+	cd "${romdir%"/bin/$target"}" || $err "!cd ${romdir%"/bin/$target"}"
 	mktarball "bin/${target}" "${archivename}.tar.xz"
-	) || err "can't create rom tarball"
+	) || $err "can't create rom tarball"
 	mv "${romdir%"/bin/${target}"}/${archivename}.tar.xz"* "${f%/*}" || \
-	    err "mktar ${f%/*}/${romdir%"/bin/$target"}/$archivename.tar.xz"
+	    $err "mktar ${f%/*}/${romdir%"/bin/$target"}/$archivename.tar.xz"
 
 	printf "Created ROM archive: %s" "${f%/*}/${archivename}.tar.xz"
 }
@@ -212,20 +212,20 @@ mktarball()
 	tar_implementation=$(tar --version | head -n1) || :
 
 	[ "${2%/*}" = "${2}" ] || \
-		mkdir -p "${2%/*}" || err "mk, !mkdir -p \"${2%/*}\""
+		mkdir -p "${2%/*}" || $err "mk, !mkdir -p \"${2%/*}\""
 	if [ "${tar_implementation% *}" = "tar (GNU tar)" ]; then
 		tar --sort=name --owner=root:0 --group=root:0 \
 		    --mtime="UTC 2024-02-25" -c "$1" | xz -T0 -9e > "$2" || \
-		    err "mktarball 1, ${1}"
+		    $err "mktarball 1, ${1}"
 	else
 		# TODO: reproducible tarballs on non-GNU systems
-		tar -c "$1" | xz -T0 -9e > "$2" || err "mktarball 2, $1"
+		tar -c "$1" | xz -T0 -9e > "$2" || $err "mktarball 2, $1"
 	fi
 	(
 	[ "${2%/*}" != "${2}" ] && x_ cd "${2%/*}"
 	sha512sum "${2##*/}" > "${2##*/}.sha512" || \
-	    err "!sha512sum \"${2##*/}\" > \"${2##*/}.sha512\""
-	) || err "failed to create tarball checksum"
+	    $err "!sha512sum \"${2##*/}\" > \"${2##*/}.sha512\""
+	) || $err "failed to create tarball checksum"
 }
 
 main $@
diff --git a/script/update/trees b/script/update/trees
index 51ea821c..40ff1878 100755
--- a/script/update/trees
+++ b/script/update/trees
@@ -28,12 +28,12 @@ main()
 		-s) mode="savedefconfig" ;;
 		-l) mode="olddefconfig" ;;
 		-n) mode="nconfig" ;;
-		*) err "Invalid option" ;;
+		*) $err "Invalid option" ;;
 		esac
 		shift; project="${OPTARG#src/}"; shift
 	done
-	[ -z "$_f" ] && err "missing flag (-m/-u/-b/-c/-x/-f/-s/-l/-n)"
-	[ -z "$project" ] && err "project name not specified"
+	[ -z "$_f" ] && $err "missing flag (-m/-u/-b/-c/-x/-f/-s/-l/-n)"
+	[ -z "$project" ] && $err "project name not specified"
 	elfdir="elf/${project}"
 	cfgsdir="config/${project}"
 
@@ -66,17 +66,17 @@ build_targets()
 	[ "$elfdir" = "elf/coreboot" ] && \
 		elfdir="elf/coreboot_nopayload_DO_NOT_FLASH"
 
-	[ -d "$cfgsdir" ] || err "directory, $cfgsdir, does not exist"
+	[ -d "$cfgsdir" ] || $err "directory, $cfgsdir, does not exist"
 
 	listfile="${cfgsdir}/build.list"
-	[ -f "$listfile" ] || err "list file, $listfile, does not exist"
+	[ -f "$listfile" ] || $err "list file, $listfile, does not exist"
 
 	# Build for all targets if no argument is given
 	[ $# -gt 0 ] && target1="$1"
 	[ "$target1" = "utils" ] && [ "$project" = "coreboot" ] && \
 		shift 1
 	targets=$(items "$cfgsdir") || \
-	    err "Cannot get options for $cfgsdir"
+	    $err "Cannot get options for $cfgsdir"
 	[ $# -gt 0 ] && targets=$@
 
 	[ -z "$mode" ] && x_ mkdir -p "$elfdir"
@@ -130,7 +130,7 @@ handle_src_tree()
 
 	x_ mkdir -p "${elfdir}/${target}"
 
-	[ -z "$tree" ] && err "handle_src_tree $project/$tree: tree unset"
+	[ -z "$tree" ] && $err "handle_src_tree $project/$tree: tree unset"
 
 	codedir="src/${project}/${tree}"
 
@@ -155,7 +155,7 @@ load_project_config()
 
 	[ -f "${1}/target.cfg" ] || return 0
 	. "${1}/target.cfg" || \
-	    err "load_project_config ${1}: cannot load target.cfg"; return 0
+	    $err "load_project_config ${1}: cannot load target.cfg"; return 0
 }
 
 check_cross_compiler()
@@ -178,7 +178,7 @@ check_cross_compiler()
 
 check_config()
 {
-	[ -f "$config" ] || err "check_config: ${project}/${target}: no config"
+	[ -f "$config" ] || $err "check_config: ${project}/${target}: no config"
 
 	dest_dir="${elfdir}/${target}/${config_name}"
 	# TODO: very hacky check. do it properly (based on build.list)
@@ -197,7 +197,7 @@ handle_makefile()
 	[ -n "$mode" ] || make -C "$codedir" silentoldconfig || \
 	    make -C "$codedir" oldconfig || :
 
-	run_make_command || err "handle_makefile $codedir: no makefile!"
+	run_make_command || $err "handle_makefile $codedir: no makefile!"
 
 	if [ -e "${codedir}/.git" ] && [ "$project" = "u-boot" ] && \
 	    [ "$mode" = "distclean" ]; then
@@ -220,7 +220,7 @@ run_make_command()
 		printf "%s\n" "${version%%-*}" > "$codedir/.coreboot-version"
 
 	make $mode -j$(nproc) $makeargs -C "$codedir" || \
-	    err "run_make $codedir: !make $mode"
+	    $err "run_make $codedir: !make $mode"
 
 	[ "$mode" != "clean" ] && return 0
 	make -C "$codedir" distclean 2>/dev/null || :
@@ -232,9 +232,9 @@ check_cmake()
 		check_makefile "${1}" || \
 		    cmake -B "${1}" "${1}/${cmakedir}" || \
 		    check_makefile "${1}" || \
-		    err "check_cmake ${1}: can't cmake ${cmakedir}"
+		    $err "check_cmake ${1}: can't cmake ${cmakedir}"
 	[ -z "${cmakedir}" ] || check_makefile "${1}" || \
-		err "check_cmake ${1}: could not generate Makefile"
+		$err "check_cmake ${1}: could not generate Makefile"
 	return 0
 }
 
@@ -242,11 +242,11 @@ check_autoconf()
 {
 	(
 	_cfgopt=""
-	cd "${1}" || err "!cd $1"
+	cd "${1}" || $err "!cd $1"
 	[ -f "bootstrap" ] && x_ ./bootstrap $bootstrapargs
 	[ -f "autogen.sh" ] && x_ ./autogen.sh ${autogenargs}
 	[ -f "configure" ] && x_ ./configure $autoconfargs; return 0
-	) || err "can't bootstrap project: $1"
+	) || $err "can't bootstrap project: $1"
 }
 
 check_makefile()
diff --git a/script/vendor/download b/script/vendor/download
index 42cb16ab..b40810cc 100755
--- a/script/vendor/download
+++ b/script/vendor/download
@@ -25,14 +25,14 @@ eval "$(setvars "" _b _dl EC_url EC_url_bkup EC_hash DL_hash DL_url DL_url_bkup
 
 main()
 {
-	[ $# -gt 0 ] || err "No argument given"
+	[ $# -gt 0 ] || $err "No argument given"
 	board="${1}"
 	boarddir="${cbcfgsdir}/${board}"
 	_b="${board%%_*mb}" # shorthand (no duplication per rom size)
 
 	check_defconfig "${boarddir}" && exit 0
 	detect_firmware && exit 0
-	scan_config "${_b}" "config/vendor" "err"
+	scan_config "${_b}" "config/vendor"
 
 	build_dependencies
 	download_vendorfiles
@@ -49,7 +49,7 @@ detect_firmware()
 	set -- "${boarddir}/config/"*
 	. "${1}" 2>/dev/null
 	. "${boarddir}/target.cfg" 2>/dev/null
-	[ -z "$tree" ] && err "detect_firmware $boarddir: tree undefined"
+	[ -z "$tree" ] && $err "detect_firmware $boarddir: tree undefined"
 	cbdir="src/coreboot/$tree"
 	cbfstool="cbutils/$tree/cbfstool"
 
@@ -110,8 +110,8 @@ fetch()
 	dl_bkup="${3}"
 	dlsum="${4}"
 	[ "${5}" = "/dev/null" ] && return 0
-	[ "${5# }" = "$5" ] || err "fetch: space not allowed in _dest: '$5'"
-	[ "${5#/}" = "$5" ] || err "fetch: absolute path not allowed: '$5'"
+	[ "${5# }" = "$5" ] || $err "fetch: space not allowed in _dest: '$5'"
+	[ "${5#/}" = "$5" ] || $err "fetch: absolute path not allowed: '$5'"
 	_dest="${5##*../}"
 	_dl="${vendir}/cache/${dlsum}"
 	dl_fail="n"
@@ -129,14 +129,14 @@ fetch()
 		vendor_checksum "${dlsum}" "${_dl}" || dl_fail="n"
 	done
 	[ "${dl_fail}" = "y" ] && \
-		err "fetch ${dlsum}: matched file unavailable"
+		$err "fetch ${dlsum}: matched file unavailable"
 
 	x_ rm -Rf "${_dl}_extracted"
 	mkdirs "${_dest}" "extract_${dl_type}" || return 0
 	eval "extract_${dl_type}"
 
 	[ -f "${_dest}" ] && return 0
-	err "extract_${dl_type} (fetch): missing file: '${_dest}'"
+	$err "extract_${dl_type} (fetch): missing file: '${_dest}'"
 }
 
 vendor_checksum()
@@ -152,17 +152,17 @@ mkdirs()
 		printf "mkdirs %s %s: already downloaded\n" "$1" "$2" 1>&2
 		return 1
 	fi
-	mkdir -p "${1%/*}" || err "mkdirs: !mkdir -p ${1%/*}"
+	mkdir -p "${1%/*}" || $err "mkdirs: !mkdir -p ${1%/*}"
 	remkdir "${appdir}"
 	extract_archive "${_dl}" "${appdir}" || \
 	    [ "${2}" = "extract_e6400vga" ] || \
-	    err "mkdirs ${1} ${2}: !extract"
+	    $err "mkdirs ${1} ${2}: !extract"
 }
 
 extract_intel_me()
 {
 	[ ! -f "$mecleaner" ] && \
-		err "extract_intel_me $cbdir: me_cleaner missing"
+		$err "extract_intel_me $cbdir: me_cleaner missing"
 
 	_me="${PWD}/${_dest}" # must always be an absolute path
 	cdir="${PWD}/${appdir}" # must always be an absolute path
@@ -170,10 +170,10 @@ extract_intel_me()
 	[ -f "${_me}" ] && return 0
 
 	sdir="$(mktemp -d)"
-	mkdir -p "$sdir" || err "extract_intel_me: !mkdir -p \"$sdir\""
+	mkdir -p "$sdir" || $err "extract_intel_me: !mkdir -p \"$sdir\""
 	(
 	[ "${cdir#/a}" != "$cdir" ] && cdir="${cdir#/}"
-	cd "$cdir" || err "extract_intel_me: !cd \"$cdir\""
+	cd "$cdir" || $err "extract_intel_me: !cd \"$cdir\""
 	for i in *; do
 		[ -f "$_me" ] && break
 		[ -L "$i" ] && continue
@@ -195,7 +195,7 @@ extract_intel_me()
 		cd "${cdir}" || :
 	done
 	)
-	rm -Rf "${sdir}" || err "extract_intel_me: !rm -Rf ${sdir}"
+	rm -Rf "${sdir}" || $err "extract_intel_me: !rm -Rf ${sdir}"
 }
 
 extract_archive()
@@ -207,44 +207,44 @@ extract_archive()
 extract_kbc1126ec()
 {
 	[ ! -f "$kbc1126_ec_dump" ] && \
-		err "extract_kbc1126ec $cbdir: kbc1126_ec_dump missing"
+		$err "extract_kbc1126ec $cbdir: kbc1126_ec_dump missing"
 	(
 	x_ cd "${appdir}/"
 	mv Rompaq/68*.BIN ec.bin || :
 	if [ ! -f ec.bin ]; then
 		unar -D ROM.CAB Rom.bin || unar -D Rom.CAB Rom.bin || \
-		    unar -D 68*.CAB Rom.bin || err "can't extract Rom.bin"
+		    unar -D 68*.CAB Rom.bin || $err "can't extract Rom.bin"
 		x_ mv Rom.bin ec.bin
 	fi
-	[ -f ec.bin ] || err "extract_kbc1126_ec ${board}: can't extract"
+	[ -f ec.bin ] || $err "extract_kbc1126_ec ${board}: can't extract"
 	"${kbc1126_ec_dump}" ec.bin || \
-	    err "extract_kbc1126_ec ${board}: can't extract ecfw1/2.bin"
-	) || err "can't extract kbc1126 ec firmware"
+	    $err "extract_kbc1126_ec ${board}: can't extract ecfw1/2.bin"
+	) || $err "can't extract kbc1126 ec firmware"
 	ec_ex="y"
 	for i in 1 2; do
 		[ -f "${appdir}/ec.bin.fw${i}" ] || ec_ex="n"
 	done
 	[ "${ec_ex}" = "y" ] || \
-	    err "extract_kbc1126_ec ${board}: didn't extract ecfw1/2.bin"
+	    $err "extract_kbc1126_ec ${board}: didn't extract ecfw1/2.bin"
 	cp "${appdir}/"ec.bin.fw* "${_dest%/*}/" || \
-	    err "extract_kbc1126_ec ${board}: can't copy ec binaries"
+	    $err "extract_kbc1126_ec ${board}: can't copy ec binaries"
 }
 
 extract_e6400vga()
 {
 	for v in E6400_VGA_offset E6400_VGA_romname; do
-		eval "[ -z \"\$$v\" ] && err \"extract_e6400vga: $v undefined\""
+		eval "[ -z \"\$$v\" ] && $err \"extract_e6400vga: $v undefined\""
 	done
 	tail -c +$E6400_VGA_offset "$_dl" | gunzip > "$appdir/bios.bin" || :
 	(
 	x_ cd "${appdir}"
-	[ -f "bios.bin" ] || err "extract_e6400vga: can't extract bios.bin"
+	[ -f "bios.bin" ] || $err "extract_e6400vga: can't extract bios.bin"
 	"${e6400_unpack}" bios.bin || printf "TODO: fix dell extract util\n"
 	[ -f "${E6400_VGA_romname}" ] || \
-		err "extract_e6400vga: can't extract vga rom from bios.bin"
-	) || err "can't extract e6400 vga rom"
+		$err "extract_e6400vga: can't extract vga rom from bios.bin"
+	) || $err "can't extract e6400 vga rom"
 	cp "${appdir}/${E6400_VGA_romname}" "${_dest}" || \
-	    err "extract_e6400vga ${board}: can't copy vga rom to ${_dest}"
+	    $err "extract_e6400vga ${board}: can't copy vga rom to ${_dest}"
 }
 
 extract_sch5545ec()
@@ -258,9 +258,9 @@ extract_sch5545ec()
 
 	# this makes the file defined by _sch5545ec_fw available to copy
 	"${uefiextract}" "${_bios}" || \
-	    err "extract_sch5545ec: cannot extract from uefi image"
+	    $err "extract_sch5545ec: cannot extract from uefi image"
 	cp "${_sch5545ec_fw}" "${_dest}" || \
-	    err "extract_sch5545ec: cannot copy sch5545ec firmware file"
+	    $err "extract_sch5545ec: cannot copy sch5545ec firmware file"
 }
 
 main $@
diff --git a/script/vendor/inject b/script/vendor/inject
index 4ac2753f..dc12d7b5 100755
--- a/script/vendor/inject
+++ b/script/vendor/inject
@@ -13,7 +13,7 @@ eval "$(setvars "" archive rom modifygbe nukemode release new_mac tree)"
 
 main()
 {
-	[ $# -lt 1 ] && err "No options specified."
+	[ $# -lt 1 ] && $err "No options specified."
 	[ "${1}" = "listboards" ] && eval "items config/coreboot || :; exit 0"
 
 	archive="${1}"
@@ -42,8 +42,8 @@ check_board()
 	failcheck="n"
 	check_release "${archive}" || failcheck="y"
 	if [ "${failcheck}" = "y" ]; then
-		[ -f "$rom" ] || err "check_board \"$rom\": invalid path"
-		[ -z "${rom+x}" ] && err "check_board: no rom specified"
+		[ -f "$rom" ] || $err "check_board \"$rom\": invalid path"
+		[ -z "${rom+x}" ] && $err "check_board: no rom specified"
 		[ -n "${board+x}" ] || board=$(detect_board "${rom}")
 	else
 		release="y"
@@ -51,11 +51,11 @@ check_board()
 	fi
 
 	boarddir="${cbcfgsdir}/${board}"
-	[ -d "$boarddir" ] || err "check_board: board $board missing"
+	[ -d "$boarddir" ] || $err "check_board: board $board missing"
 	[ -f "$boarddir/target.cfg" ] || \
-		err "check_board $board: target.cfg missing"
+		$err "check_board $board: target.cfg missing"
 	. "$boarddir/target.cfg" 2>/dev/null
-	[ -z "$tree" ] && err "check_board $board: tree undefined"; return 0
+	[ -z "$tree" ] && $err "check_board $board: tree undefined"; return 0
 }
 
 check_release()
@@ -80,7 +80,7 @@ detect_board()
 		_stripped_prefix=${filename#*_}
 		board="${_stripped_prefix%.tar.xz}" ;;
 	*)
-		err "detect_board $filename: could not detect board type"
+		$err "detect_board $filename: could not detect board type"
 	esac	
 	printf "%s\n" "${board}"
 }
@@ -109,7 +109,7 @@ patch_release_roms()
 	_tmpdir="tmp/romdir"
 	remkdir "${_tmpdir}"
 	tar -xf "${archive}" -C "${_tmpdir}" || \
-	    err "patch_release_roms: !tar -xf \"$archive\" -C \"$_tmpdir\""
+	    $err "patch_release_roms: !tar -xf \"$archive\" -C \"$_tmpdir\""
 
 	for x in "${_tmpdir}"/bin/*/*.rom ; do
 		printf "patching rom: %s\n" "$x"
@@ -118,14 +118,14 @@ patch_release_roms()
 
 	(
 	cd "${_tmpdir}/bin/"* || \
-	    err "patch_release_roms: !cd ${_tmpdir}/bin/*"
+	    $err "patch_release_roms: !cd ${_tmpdir}/bin/*"
 
 	# NOTE: For compatibility with older rom releases, defer to sha1
 	[ "${nukemode}" = "nuke" ] || sha512sum --status -c vendorhashes || \
 	    sha1sum --status -c vendorhashes || sha512sum --status -c \
 	    blobhashes || sha1sum --status -c blobhashes || \
-	    err "patch_release_roms: ROMs did not match expected hashes"
-	) || err "can't verify vendor hashes"
+	    $err "patch_release_roms: ROMs did not match expected hashes"
+	) || $err "can't verify vendor hashes"
 
 	[ "${modifygbe}" = "true" ] && \
 		for x in "${_tmpdir}"/bin/*/*.rom ; do
@@ -143,7 +143,7 @@ patch_rom()
 {
 	rom="${1}"
 
-	check_defconfig "$boarddir" && err "patch_rom $boarddir: no configs"
+	check_defconfig "$boarddir" && $err "patch_rom $boarddir: no configs"
 
 	set -- "${boarddir}/config/"*
 	. "${1}" 2>/dev/null
@@ -174,18 +174,18 @@ patch_rom()
 inject()
 {
 	[ $# -lt 3 ] && \
-		err "inject $@, $rom: usage: inject name path type (offset)"
+		$err "inject $@, $rom: usage: inject name path type (offset)"
 
 	eval "$(setvars "" cbfsname _dest _t _offset)"
 	cbfsname="${1}"
 	_dest="${2##*../}"
 	_t="${3}"
 	[ $# -gt 3 ] && _offset="-b ${4}" && [ -z "${4}" ] && \
-	    err "inject $@, $rom: offset passed, but empty (not defined)"
+	    $err "inject $@, $rom: offset passed, but empty (not defined)"
 
-	[ -z "${_dest}" ] && err "inject $@, ${rom}: empty destination path"
+	[ -z "${_dest}" ] && $err "inject $@, ${rom}: empty destination path"
 	[ ! -f "${_dest}" ] && [ "${nukemode}" != "nuke" ] && \
-		err "inject_${dl_type}: file missing, ${_dest}"
+		$err "inject_${dl_type}: file missing, ${_dest}"
 
 	[ "$nukemode" = "nuke" ] || \
 		printf "Inserting %s/%s in file: %s\n" "$cbfsname" "$_t" "$rom"
@@ -193,18 +193,18 @@ inject()
 	if [ "${_t}" = "GbE" ]; then
 		x_ mkdir -p tmp
 		cp "${_dest}" "tmp/gbe.bin" || \
-		    err "inject: !cp \"${_dest}\" \"tmp/gbe.bin\""
+		    $err "inject: !cp \"${_dest}\" \"tmp/gbe.bin\""
 		_dest="tmp/gbe.bin"
 		"${nvmutil}" "${_dest}" setmac "${new_mac}" || \
-		    err "inject ${_dest}: can't change mac address"
+		    $err "inject ${_dest}: can't change mac address"
 	fi
 	if [ "${cbfsname}" = "IFD" ]; then
 		if [ "${nukemode}" != "nuke" ]; then
 			"$ifdtool" -i ${_t}:${_dest} "$rom" -O "$rom" || \
-			    err "inject: can't insert $_t ($dest) into $rom"
+			    $err "inject: can't insert $_t ($dest) into $rom"
 		else
 			"$ifdtool" --nuke $_t "$rom" -O "$rom" || \
-			    err "inject $rom: can't nuke $_t in IFD"
+			    $err "inject $rom: can't nuke $_t in IFD"
 		fi
 	else
 		if [ "${nukemode}" != "nuke" ]; then
@@ -214,11 +214,11 @@ inject()
 			else
 				"$cbfstool" "$rom" add -f "$_dest" \
 				    -n "$cbfsname" -t $_t $_offset || \
-				    err "$rom: can't insert $_t file $_dest"
+				    $err "$rom: can't insert $_t file $_dest"
 			fi
 		else
 			"$cbfstool" "$rom" remove -n "$cbfsname" || \
-			    err "inject $rom: can't remove $cbfsname"
+			    $err "inject $rom: can't remove $cbfsname"
 		fi
 	fi
 }