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>

1 files changed, 18 insertions, 9 deletions

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 $@