Convert absolute symlinks to relative symlinks

linkrel.sh

#!/bin/sh

for f in "$@"; do
	path=$(readlink "$f")
	if [ -n "$path" ]; then
		cd "$(dirname "$f")"
		rpath=$(realpath -s --relative-to="$PWD" "$path")
		[ ! $? ] && echo "broken symlink: $f" >&2
		cd - > /dev/null
		if [ -n "$rpath" ] && [ "$path" != "$rpath" ]; then
			echo "$f: $path -> $rpath"
			ln -sfT "$rpath" "$f"
		fi
	fi
done