限制bash中的文件名长度

echo "longfilename.txt" | cut -c 1-255

basename -s .txt "longfilename.txt" | cut -c 1-255

#!/bin/bash

filename="longfilename.txt"
max_length=255

if [ ${#filename} -gt $max_length ]; then
  truncated_filename=${filename:0:$max_length}
  echo "Truncated filename: $truncated_filename"
else
  echo "Filename is within the limit: $filename"
fi