add option to configure null terminated output

recall.sh

@@ -8,6 +8,7 @@ fi
 LOG_ROOT="$HOME"/.local/var/log/shell # source this
 
 LIST_MODE=false
+ORS='\n'
 
 usage () {
 	cat <<EOF
@@ -32,10 +33,14 @@ the captured exit status.
     - List at most 10 paths to all captured find commands
 
       ${0##*/} -l -n 10 find
+
+    - List paths null delimited for pipe (in case of paths with new line char)
+
+      ${0##*/} -l -z find | xargs -r -0 ls -lahd
 EOF
 }
 
-OPTSTRING=":hln:"
+OPTSTRING=":hln:z"
 parse_opt () {
 	case "${opt}" in
 		h)
@@ -56,6 +61,9 @@ parse_opt () {
 				exit 1
 			fi
 		;;
+		z)
+			ORS='\0'
+		;;
 		\?)
 			echo "Unknown switch: -$OPTARG" >&2
 			echo >&2
@@ -125,14 +133,17 @@ awk_rw0_strip_first_path_part () {
 
 }
 
-awk_rw0_add_prefix () {
+awk_r0_add_prefix () {
 	# NOTE: some-string -> <prefix>some-string (null delimited)
-	: "${1?awk_rw0_add_prefix requires exactly one positional arg}"
-	[ "${1+DefinedMaybeEmpty}" == "DefinedMaybeEmpty" ]
+	: "${2?awk_r0_add_prefix requires exactly two positional args}"
+	: "${1:?awk_r0_add_prefix output record separator must be set and non-empty}"
+	[ "${1:+DefinedNotEmpty}" == "DefinedNotEmpty" ]
+	[ "${2+DefinedMaybeEmpty}" == "DefinedMaybeEmpty" ]
 	awk \
-		-v prefix="$1/" \
+		-v prefix="$2/" \
 		-v RS='\0' \
-		-v ORS='\n' '{print prefix $0}' \
+		-v ORS="$1" \
+	       '{print prefix $0}' \
 	&& :
 }
 
@@ -159,8 +170,8 @@ then
 		| head -zn "${NUM:--0}" \
 		| fzf_rw0_inplace_preview \
 		| awk_rw0_strip_first_path_part \
-		| awk_rw0_add_prefix "$LOG_ROOT" \
-		&& : "TODO: allow configuring null terminated output"
+		| awk_r0_add_prefix "$ORS" "$LOG_ROOT" \
+		&& :
 	)
 else
 	SUBPROG=""