use the new coding style in scripts

there were stragglers left over from the last audit,
and these stragglers still exist even after all the
major re-factoring as of late

the new style is: bsd-like coding style and error
handling. verbose yet simple error handling. we use
an "err" function in a way reminiscent of most C
programs that you see in openbsd base (err.h)

this style is very clean, resulting in readable code

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

7 files changed, 124 insertions, 71 deletions

diff --git a/resources/scripts/build/clean/cbutils b/resources/scripts/build/clean/cbutils
index dec8d944..067c2cb2 100755
--- a/resources/scripts/build/clean/cbutils
+++ b/resources/scripts/build/clean/cbutils
@@ -24,26 +24,36 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
-# clean coreboot utilities (dependencies for 'build'):
-
-printf "Cleaning the previous build of coreboot and its utilities\n"
-
-rm -Rf cbutils
-
-[ ! -d "coreboot/" ] && exit 0
-
-for tree in coreboot/*; do
-	[ "${tree##*/}" = "coreboot" ] && continue
-	[ -d "${tree}" ] || continue
-
-	# Clean coreboot, of course
-	make -C "${tree}/" distclean
-
-	# Clean its utilities as well
-	for util in cbfstool ifdtool nvramtool cbmem; do
-		make distclean -C "${tree}/util/${util}/"
+. "include/err.sh"
+
+main()
+{
+	printf "Cleaning the previous build of coreboot and its utilities\n"
+
+	rm -Rf cbutils || err "cannot remove cbutils/"
+	[ ! -d "coreboot/" ] && exit 0
+
+	clean_cbutils
+}
+
+clean_cbutils()
+{
+	for tree in coreboot/*; do
+		[ "${tree##*/}" = "coreboot" ] && continue
+		[ -d "${tree}" ] || continue
+
+		# Clean coreboot, of course
+		make -C "${tree}/" distclean || \
+		    err "cannot distclean coreboot tree, ${tree}"
+
+		# Clean its utilities as well
+		for util in cbfstool ifdtool nvramtool cbmem; do
+			make distclean -C "${tree}/util/${util}/" || \
+			    err "cannot clean util, ${util}, at ${tree}"
+		done
+		make distclean -C "${tree}/payloads/libpayload/" || \
+		    err "cannot distclean libpayload, at ${tree}"
 	done
-	make distclean -C "${tree}/payloads/libpayload/"
-done
+}
 
-printf "\n\n"
+main $@
diff --git a/resources/scripts/build/clean/crossgcc b/resources/scripts/build/clean/crossgcc
index 76de1e19..7b1765f8 100755
--- a/resources/scripts/build/clean/crossgcc
+++ b/resources/scripts/build/clean/crossgcc
@@ -29,9 +29,14 @@ main()
 	printf "Cleaning crossgcc builds in all coreboot archives\n"
 	[ ! -d "coreboot/" ] && exit 0
 
+	clean_crossgcc
+}
+
+clean_crossgcc()
+{
 	for board in coreboot/*; do
+		[ -d "${board}" ] || continue
 		[ "${board##*/}" = "coreboot" ] && continue
-		[ ! -d "${board}" ] && continue
 		make -C "${board}/" crossgcc-clean || err "make-clean"
 	done
 }
diff --git a/resources/scripts/build/clean/seabios b/resources/scripts/build/clean/seabios
index e9b11e5b..c6759e83 100755
--- a/resources/scripts/build/clean/seabios
+++ b/resources/scripts/build/clean/seabios
@@ -2,7 +2,7 @@
 
 #  helper script: clean the dependencies that were built in seabios
 #
-#	Copyright (C) 2015, 2020, 2021 Leah Rowe <info@minifree.org>
+#	Copyright (C) 2015,2020,2021,2023 Leah Rowe <info@minifree.org>
 #
 #    This program is free software: you can redistribute it and/or modify
 #    it under the terms of the GNU General Public License as published by
@@ -26,13 +26,22 @@ set -u -e
 # clean bucts
 # --------------------------------------------------------
 
-printf "Cleaning the previous builds of seabios\n"
+main()
+{
+	[ ! -d "elf/seabios" ] || rm -Rf elf/seabios || \
+	    err "cannot remove elf/seabios"
+	[ ! -d "seabios/" ] && exit 0
 
-[ ! -d "elf/seabios" ] || rm -Rf elf/seabios || err "cannot remove elf/seabios"
-[ ! -d "seabios/" ] && exit 0
+	clean_seabios
+}
 
-for x in seabios/*; do
-	[ "${x}" = "seabios/seabios" ] && continue
-	[ ! -d "${x}" ] && continue
-	make -C "${x}" distclean || err "cannot distclean tree, ${x}"
-done
+clean_seabios()
+{
+	for x in seabios/*; do
+		[ ! -d "${x}" ] && continue
+		[ "${x}" = "seabios/seabios" ] && continue
+		make -C "${x}" distclean || err "cannot distclean tree, ${x}"
+	done
+}
+
+main $@
diff --git a/resources/scripts/build/clean/u-boot b/resources/scripts/build/clean/u-boot
index 6a59a5c1..7ba3a4a9 100755
--- a/resources/scripts/build/clean/u-boot
+++ b/resources/scripts/build/clean/u-boot
@@ -2,7 +2,7 @@
 
 #  helper script: clean the u-boot builds
 #
-#	   Copyright (C) 2014, 2015, 2016, 2020 Leah Rowe <info@minifree.org>
+#	   Copyright (C) 2014-2016, 2020, 2023 Leah Rowe <info@minifree.org>
 #	   Copyright (C) 2015 Klemens Nanni <contact@autoboot.org>
 #	   Copyright (C) 2022 Alper Nebi Yasak <alpernebiyasak@gmail.com>
 #
@@ -23,17 +23,28 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
-printf "Cleaning u-boot builds for all boards\n"
+. "include/err.sh"
 
-for board in u-boot/*; do
-	if [ "${board##*/}" = "u-boot" ] || [ ! -d "${board}" ]; then
-		continue
-	fi
+main()
+{
+	printf "Cleaning u-boot builds for all boards\n"
+	clean_uboot
+}
 
-	make -C "${board}/" distclean
+clean_uboot()
+{
+	for board in u-boot/*; do
+		if [ "${board##*/}" = "u-boot" ] || [ ! -d "${board}" ]; then
+			continue
+		fi
 
-	[ -e "${board}/.git" ] && \
-		git -C "${board}" clean -fdx
-done
+		make -C "${board}/" distclean || \
+		    err "cannot distclean u-boot dir, ${board}"
 
-printf "\n\n"
+		[ ! -e "${board}/.git" ] || \
+			git -C "${board}" clean -fdx || \
+			    err "cannot clean u-boot git repo, ${board}"
+	done
+}
+
+main $@
diff --git a/resources/scripts/build/coreboot/utils b/resources/scripts/build/coreboot/utils
index e24378d3..d381f9e2 100755
--- a/resources/scripts/build/coreboot/utils
+++ b/resources/scripts/build/coreboot/utils
@@ -21,10 +21,12 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
-printf "Building coreboot utils\n"
+. "include/err.sh"
 
 main()
 {
+	printf "Building coreboot utils\n"
+
 	if [ $# -gt 0 ]; then
 		for board in "${@}"; do
 			build_for_mainboard ${board} || \
@@ -45,28 +47,28 @@ build_for_mainboard() {
 	[ -f "resources/coreboot/${board}/target.cfg" ] || continue
 	tree="undefined"
 	. "resources/coreboot/${board}/target.cfg" # source
-	if [ "${tree}" = "undefined" ]; then
-		printf "build/cbutils: improper tree definition for '%s'" \
-				"${board}"
-		return 1
-	fi
-	buildutils "${tree}" || return 1
+	[ "${tree}" = "undefined" ] && \
+		err "build/cbutils: improper tree definition for '${board}'"
+	buildutils "${tree}"
 }
 
 buildutils() {
 	tree="${1}"
 	[ -d "coreboot/${tree}/" ] || \
-		./fetch_trees coreboot $tree || return 1
+		./fetch_trees coreboot $tree || \
+		    err "cannot fetch ${tree}"
 	for util in cbfstool ifdtool; do
 		[ -f "cbutils/${tree}/${util}" ] && continue
 		[ -d "cbutils/${tree}" ] || \
-			mkdir -p "cbutils/${tree}" || return 1
+			mkdir -p "cbutils/${tree}" || \
+			    err "cannot create directory, cbutils/${tree}"
 
 		utildir="coreboot/${tree}/util/${util}"
-		make distclean -C "${utildir}" || return 1
-		make -j$(nproc) -C "${utildir}" || return 1
-		mv "${utildir}/${util}" "cbutils/${tree}" || return 1
-		make distclean -C "${utildir}" || return 1
+		make distclean -C "${utildir}" || err "cannot clean ${utildir}"
+		make -j$(nproc) -C "${utildir}" || err "cannot build ${utildir}"
+		cp "${utildir}/${util}" "cbutils/${tree}" || \
+		    err "cannot copy util, ${util}, to cbutils/${tree}/"
+		make distclean -C "${utildir}" || err "can't clean ${utildir}"
 	done
 }
 
diff --git a/resources/scripts/build/grub/payload b/resources/scripts/build/grub/payload
index 4886a874..7f1d239f 100755
--- a/resources/scripts/build/grub/payload
+++ b/resources/scripts/build/grub/payload
@@ -21,6 +21,8 @@
 [ "x${DEBUG+set}" = 'xset' ] && set -v
 set -u -e
 
+. "include/err.sh"
+
 grubcfgsdir="resources/grub"
 keymap=""
 
@@ -30,26 +32,29 @@ main()
 {
 	printf "Creating GRUB payloads and configuration files\n"
 
-	[ ! -d "grub/" ] && \
-		./fetch grub
-	[ ! -f "grub/grub-mkstandalone" ] && \
-		./build grub utils
-	[ ! -d "elf/" ] && \
-		mkdir -p elf/
-	[ ! -d "elf/grub" ] && \
-		mkdir -p elf/grub/
-
-	rm -f elf/grub/*
+	handle_dependencies
 
 	# Separate GRUB payload per keymap to save space in ROM.
-
 	for keylayoutfile in ${grubcfgsdir}/keymap/*.gkb; do
+		[ -f "${keylayoutfile}" ] || continue
 		build_grub_payloads "${keylayoutfile}"
 	done
 
 	printf "Done! Check elf/grub/ to see the files.\n\n"
 }
 
+handle_dependencies()
+{
+	[ -d "grub/" ] || \
+		./fetch grub || err "cannot fetch grub"
+	[ -f "grub/grub-mkstandalone" ] || \
+		./build grub utils || err "cannot build grub utils"
+	[ -d "elf/grub" ] || \
+		mkdir -p elf/grub || err "cannot create directory, elf/grub"
+
+	rm -f elf/grub/* || err "cannot delete files in directory, elf/grub/"
+}
+
 build_grub_payloads()
 {
 	keylayoutfile=${1}
@@ -79,15 +84,16 @@ build_grub_elf()
 	    --fonts= --themes= --locales=  \
 	    --modules="${grub_modules}" \
 	    --install-modules="${grub_install_modules}" \
-	    ${gcfg} ${grubk}
+	    ${gcfg} ${grubk} || \
+	    err "cannot create grub payload (grub-mkstandalone)"
 }
 
 create_grub_config()
 {
 	sed "s/usqwerty/${keymap}/" < ${grubcfgsdir}/config/grub.cfg \
-	    > elf/grub/grub_${keymap}.cfg
+	    > elf/grub/grub_${keymap}.cfg || err "sed failed: grub.cfg"
 	sed "s/grubtest.cfg/grub.cfg/" < elf/grub/grub_${keymap}.cfg \
-	    > elf/grub/grub_${keymap}_test.cfg
+	    > elf/grub/grub_${keymap}_test.cfg || err "sed failed: grubtest.cfg"
 }
 
 main $@
diff --git a/resources/scripts/build/src/for b/resources/scripts/build/src/for
index 57459952..6945b9f9 100755
--- a/resources/scripts/build/src/for
+++ b/resources/scripts/build/src/for
@@ -46,8 +46,14 @@ main()
 	[ -z "${project}" ] && err "project name not specified"
 	[ "${project}" = "ich9utils" ] && project="util/ich9utils"
 
-	[ -d "${project}" ] || ./fetch "${project%/*}" \
-	    || err "Cannot download project, ${project%/*}"
+	handle_dependencies
+	run_make_command
+}
+
+handle_dependencies()
+{
+	[ -d "${project}" ] || ./fetch "${project%/*}" || \
+	    err "Cannot download project, ${project%/*}"
 	[ -d "${project}" ] || err "Project, ${project%/*}, not downloaded"
 
 	if [ "${project}" = "uefitool" ]; then
@@ -56,6 +62,10 @@ main()
 		cmake UEFIExtract/ || err "cannot cmake UEFIExtract"
 		)
 	fi
+}
+
+run_make_command()
+{
 	[ ! -z "${mode}" ] || \
 		make -C "${project}" || err "'make' failed (${project})"
 	[ -z "${mode}" ] || \