Ever wanted to do bulk operations on files, similar to xargs, but much more flexible? For example:

• rename all files .jpeg to .jpg
• remove a prefix from many file names?
• add a suffix/extension?
• remove a prefix/suffx/extension?

Here’s a script I wrote:

!/bin/bash

#

Pattern-based file rename

#(c)2006 by Tadeusz Pietraszek

#

Usage:

./mv-pattern -i a *.txt <- delete all 'a's in file names

./mv-pattern -i jpeg -o jpg *.jpeg <- rename all jpegs to jpg

./mv-pattern -o .txt <- add an extension

./mv-pattern -i .txt <- remove an extension

#

if [ $# -eq 0 ]
then
  echo "Usage: basename $0 [-i ]  [-o ]  [-c ] files"
  exit -1;
fi

INPATTERN="";
OUTPATTERN="";
COMMAND="echo";

while getopts "i:o:c:" Option
do
  case $Option in
    i ) INPATTERN=$OPTARG;;
    o ) OUTPATTERN=$OPTARG;;
    c ) COMMAND=$OPTARG;;
    * ) echo "Unimplemented option chosen. Has to be one of -i -o -c"; exit -1;;
  esac
done

if [ -z "$INPATTERN" ]; then
  echo "No input pattern. Are you sure it's what you want?";

exit -1;

fi

if [ -z "$INPATTERN" ]; then
  echo "No input pattern. Are you sure it's what you want?";

exit -1;

fi

shift $(($OPTIND - 1))

Decrements the argument pointer so it points to next argument.

echo "in: $INPATTERN, out: $OUTPATTERN";

rename

for FILE in  "$@" ; do
    if [ -f $FILE ]; then
        NEWFILE=echo $FILE | sed -re "s/(.*)$INPATTERN(.*)/\1$OUTPATTERN\2/";
        if [ "$FILE" != "$NEWFILE" ]; then
            $COMMAND $FILE $NEWFILE;
        fi;
    fi;
done

exit 0

This entry was posted on Monday, April 3rd, 2006 at 1:31 pm and is filed under Linux, Progs/Tools/Libs. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.