Shell Script help. Don't know how to solve... Pls help

mangya · 08-06-2015, 07:36 AM

Hello

I have lot of textfiles written in vim editor. They are stored in multiple directories. Some have .txt extension and others have none. Reading them in linux is no problem. But when i try to open them in MS-Windows or smartphone, and because so many files have no .txt extension, it would ask to associate files with any program.

so i wrote a shell script to append .txt extension and also do some extra work for all files UNDER a directory.

The script is as follows:

Code:

#!/bin/bash
# Script Name: textren
# Renames text files.
# This shell does the following to files in a folder:
# 1) Check if the file is ASCII text.
# 2) Converts filename to lower case.
# 3) Replaces multiple spaces with single _.
# 4) Check if .txt extension exist, else append .txt extension.

for f in *; do
  # Check if 'f' is a file, and then check if it is a text file.
  if [[ -f "$f" && $(file "$f" | grep 'ASCII text$') ]]; then

    # Convert to lower case
    fLower="${f,,}";

    # Replace multiple spaces with single underscore
    fReplace="$(echo $fLower | sed 's/  */_/g')";

    # Find length of file
    length=${#fReplace};

    # Target file Add/Replace .txt extension
    if [[ "${fReplace:(( $length - 4 )):4}" != ".txt" ]]; then
      fTarget="$fReplace.txt";
    else
      fTarget="$fReplace";
    fi

  mv -nv "$f" "$fTarget" 2>/dev/null

  fi
done

OUTPUT: (Before):

Code:

$ ls -1
chrome plugins.txt
ffmpeg
Firefox-Plugins
git
mencoder.txt
nautilus DEL key
OPTIPING.TXT
pngcrush
thunderbird
Thunderbird 5 Shortcuts.pdf
tmux

OUTPUT: (After)

Code:

$ textren 
‘chrome plugins.txt’ -> ‘chrome_plugins.txt’
‘ffmpeg’ -> ‘ffmpeg.txt’
‘Firefox-Plugins’ -> ‘firefox-plugins.txt’
‘git’ -> ‘git.txt’
‘nautilus DEL key’ -> ‘nautilus_del_key.txt’
‘OPTIPING.TXT’ -> ‘optiping.txt’
‘pngcrush’ -> ‘pngcrush.txt’
‘thunderbird’ -> ‘thunderbird.txt’
‘tmux’ -> ‘tmux.txt’

$ ls -1
chrome_plugins.txt
ffmpeg.txt
firefox-plugins.txt
git.txt
mencoder.txt
nautilus_del_key.txt
optiping.txt
pngcrush.txt
Thunderbird 5 Shortcuts.pdf
thunderbird.txt
tmux.txt

So far so good. But now I realized, I have lot of sub-directories within sub-directories. It has become very painful to CD to every directory and run the script.

How do I make changes in the script so that it is applied recursively. I tried this - it doesn't work.

Code: