grep and cut in a cue file + mkdir creates a directory name with a question mark

Question

I do this:

var=`grep GENRE Billy_Cobham_-_Drum_\&_Voice_2.cue | cut -d ' ' -f 3`
mkdir $var

The file.cue interested line is:

REM GENRE Funky+Jazz

When mkdir creates the directory, the directory showed with ls is:

Funky+Jazz?

I made many tests to understand with many command like awk grep cut sed in all tests reading the terminal the results is "Funky+Jazz". But the string have an hidden "Starting new line". And, it generated the strange result when mkdir command is invoked.

If I open terminal in the Funky+Jazz directory the shell appear as:

 $ @host:~/Desktop/test/5/Funky+Jazz

I don't know how to solve this problem and have a correct directory name without question mark.This is my cue

REM GENRE Funky+Jazz
REM DATE 2006
REM DISCID 920BFB0A
REM COMMENT "ExactAudioCopy v0.95b4"
PERFORMER "Billy Cobham"
TITLE "Drum & Voice 2"
FILE "Billy_Cobham_-_Drum_&_Voice_2.ape" WAVE
  TRACK 01 AUDIO
    TITLE "Waveform"
    PERFORMER "Billy Cobham"
    INDEX 01 00:00:00
  TRACK 02 AUDIO
    TITLE "Real Funk"
    PERFORMER "Billy Cobham"
    INDEX 00 05:04:19
    INDEX 01 05:06:21
  TRACK 03 AUDIO
    TITLE "Running"
    PERFORMER "Billy Cobham"
    INDEX 00 09:42:52
    INDEX 01 09:44:56
  TRACK 04 AUDIO
    TITLE "Final Destination"
    PERFORMER "Billy Cobham"
    INDEX 00 17:30:36
    INDEX 01 17:32:38
  TRACK 05 AUDIO
    TITLE "One More Day To Live"
    PERFORMER "Billy Cobham"
    INDEX 00 24:26:37
    INDEX 01 24:28:38
  TRACK 06 AUDIO
    TITLE "Ozone Part 1"
    PERFORMER "Billy Cobham"
    INDEX 00 29:41:47
    INDEX 01 29:43:39
  TRACK 07 AUDIO
   TITLE "Ozone Part 2"
    PERFORMER "Billy Cobham"
    INDEX 00 31:56:06
    INDEX 01 31:56:16
  TRACK 08 AUDIO
TITLE "Take Seven"
    PERFORMER "Billy Cobham"
    INDEX 00 38:24:64
INDEX 01 38:26:68
  TRACK 09 AUDIO
    TITLE "Let Me Breathe"
PERFORMER "Billy Cobham"
    INDEX 00 44:28:41
    INDEX 01 44:30:41
  TRACK 10 AUDIO
    TITLE "Amazon"
    PERFORMER "Billy Cobham"
    INDEX 00 48:54:16
    INDEX 01 48:56:20

Answer 1

A solution is the following:

#!/bin/bash

while read line; do
   if [ "${line:0:10}" = "REM GENRE " ]; then
      folder=$(echo "${line:10}" | tr -d '\n\r')
      mkdir $folder
      break
   fi
done < file.cue
echo "Folder $folder has been created"

Tested with the sample file you have appended as a comment to this answer.

Explanation: At the beginning there is a while loop, which, as you can see from done < file.cue, it reads the file.cue and reads, one by one, the file.cue's lines. The if statement now, the line

if [ "${line:0:10}" = "REM GENRE " ]; then

means: If the first 10 letters of the variable 'line' equals to "REM GENRE " then...

When the if statement is true, we are on the line we are interested in. What we care about this line, is the characters after the 10th letter of $line, though. The ${line:10}, means everything after the 1st 10 letters of variable 'line'.

So, I 'echo' everything after the 1st 10 characters, and, with the help of 'tr' I cut any newline character (which was what caused the problem, in reality). I append this to the variable 'folder' and I create it.