updated configs

2026-09-03 21:03:02 -06:00
parent 5528d67234
commit 955bce98fc
25 changed files with 492 additions and 59 deletions
@@ -0,0 +1,47 @@
+command -v dd &>/dev/null || return 0
+
+utils.dd() {
+	local ARGS=()
+
+	# "byte size" dd default is 512-bytes, but 4M is modern sweet spot
+	local bs=4M
+
+	# show the progress bar (I can never remember to include this)
+	local status=progress
+
+	# By default, dd goes through kernel write cache which means dd could
+	# report "Done" but the kernel is still flushing data to the USB in
+	# the background. Disconnecting the USB drive at that point will
+	# corrupt the image
+	#
+	# synchronous mosde is slower, but forces each write to hit the
+	# physical device before dd moves on to the next block
+	#
+	# tl;dr "synchronous" mode = Done means Done
+	local oflag=sync
+
+	local _S
+	while [[ ${#} -gt 0 ]]
+	do
+		_S=1
+		case ${1} in
+			( bs=*     ) bs=''     ; ARGS+=(${1}) ;;
+			( status=* ) status='' ; ARGS+=(${1}) ;;
+			( oflag=*  ) oflag=''  ; ARGS+=(${1}) ;;
+			( *        )             ARGS+=(${1}) ;;
+		esac
+
+		shift ${_S} || {
+			echo "ERROR missing argument for '${1}'"
+			return 1
+		}
+	done
+
+	local my_default
+	for my_default in bs status oflag
+	do
+		[ "${(P)my_default}" ] && ARGS+=("${my_default}=${(P)my_default}")
+	done
+
+	dd ${ARGS[@]}
+}