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Bash Script The sed command does not work correctly with a file passed through the command line

Problem

As I try to write a script to rename massive files in accordance with some regular expression requirement, the command works fine on my iTerm2, but the same command does not work in the script.

Plus, some of my file names include some Chinese and Korean characters. (don't know if this is a problem or not)

code

So, my code accepts three inputs: the old regular expression, the new regular expression, and the files that need to be renamed.

There is no code here:

#!/bin/bash

# we have less than 3 arguments. Print the help text:
if [ $# -lt 3 ] ; then
  cat << HELP
ren -- renames a number of files using sed regular expressions USAGE: ren 'regexp'
'replacement' files...

EXAMPLE: rename all *.HTM files into *.html:
ren 'HTM' 'html' *.HTM

HELP
  exit 0
fi

OLD="$1"
NEW="$2"
# The shift command removes one argument from the list of
# command line arguments.
shift
shift
# $@ contains now all the files:
for file in "$@"; do
  if [ -f "$file" ] ; then
    newfile=`echo "$file" | sed "s/${OLD}/${NEW}/g"`
    if [ -f "$newfile" ]; then
      echo "ERROR: $newfile exists already"
    else
      echo "renaming $file to $newfile ..."
      mv "$file" "$newfile"
    fi
  fi
done

I will register the bash command in .profile as:

alias ren="bash /pathtothefile/ren.sh"

Test

The original file name is "제 01 과 .mp3" and I want it to become "第 01 课 .mp3".

So, with my script, I use:

$ ren "제\([0-9]*\)과" "第\1课" *.mp3

, sed script .

, , :

$ echo "제01과.mp3" | sed s/"제\([0-9]*\)과\.mp3"/"第\1课\.mp3"/g

?

script, :

newfile=`echo "$file" | sed "s/${OLD}/${NEW}/g"`
echo "The ${file} is changed to ${newfile}"

:

The 제01과.mp3 is changed into 제01과.mp3
ERROR: 제01과.mp3 exists already

, .

( bash 4.2.45 (2), Mac OS 10.9)

bash . for. - . files.txt, :

$ ls | grep mp3 > files.txt

-. bash, :

$ file="제01과.mp3"
$ echo $file | sed s/"제\([0-9]*\)과\.mp3"/"第\1课\.mp3"/g


第01课.mp3

:

files=`cat files.txt`
for file in $files
do
    echo $file | sed s/"제\([0-9]*\)과\.mp3"/"第\1课\.mp3"/g
done

!

:

echo $file

:

$ 제30과.mp3

( 30)

, :

$ echo $file | sed s/"제\([0-9]*\)과\.mp3"/"第\1课\.mp3"/g

:

$ 제30과.mp3

, :

$ newfile="제30과.mp3"
$ echo $newfile | sed s/"제\([0-9]*\)과\.mp3"/"第\1课\.mp3"/g

:

$第30课.mp3

WOW ORZ... ! ! ! , , , , :

if [[ $file == $new ]]; then
    echo True
else
    echo False
fi

:

False

, , , - ? .

2

, , . , :

file="제30과.mp3"

script, sed . , $@ :

file=./*mp3

sed . . btw, mac sed -r, ubuntu -r , .

+4
2

:

  • , -r sed, -E grep
  • - :)

files="제2과.mp3 제30과.mp3"
for file in $files
do
    echo $file | sed -r 's/제([0-9]*)과\.mp3/第\1课.mp3/g'
done


第2课.mp3
第30课.mp3
+1

, , , , http://www.tldp.org/LDP/GNU-Linux-Tools-Summary/html/x4055.htm:

0

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