$NetBSD$

Make usage of find portable.

--- scan.orig	2018-01-19 20:40:49.000000000 +0000
+++ scan
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/pkg/bin/bash
 #
 # Take a pathname as an argument and output a playlist to standard
 # output and errors to standard error.
@@ -15,15 +15,14 @@ set -eu -o pipefail  # pipefail requires
 PATHNAME="$1"
 
 if [ -d "$PATHNAME" ]; then
-	find -L "$PATHNAME" -type f -regextype posix-egrep \
-		-iregex '.*\.(ogg|oga|aac|cdaudio|mp3|flac|wav|aif|aiff|m4a|wma)'
+	find -L "$PATHNAME" -type f | grep -Ei '.*\.(ogg|oga|aac|cdaudio|mp3|flac|wav|aif|aiff|m4a|wma)'
 else
 	cat "$PATHNAME"
 fi |
 
 # Parse artist and title information from matching filenames
 
-sed -n '
+gsed -n '
 {
 # /[<ABnum>[.]] <artist> - <title>.ext
 s:/\([A-H]\?[A0-9]\?[0-9].\? \+\)\?\([^/]*\) \+- \+\([^/]*\)\.[A-Z0-9]*$:\0\t\2\t\3:pi
@@ -39,7 +38,7 @@ s:/\([A-H]\?[A0-9]\?[0-9].\? \+\)\?\([^/
 
 # Extract BPM metadata from title (eg. "Ghostbusters (115.6 BPM)")
 
-sed '
+gsed '
 {
 # BPM
 s:\(.*\) *(\([0-9]\+\.\?[0-9]\+\) *BPM)$:\1\t\2: