Homework & Coursework Questions

CreateFile(){
    if [ ! -f $1 ]
    then
        touch $1 > /dev/null 2>&1 && echo "File $1 created"
    else
        echo "Error: $1 file exists!"
    fi

[/SIZE][/FONT][/FONT]  [FONT=Verdana][SIZE=2]OLDEXT=${2/#.}
NEWEXT=${3/#.}

find "${1}" -iname "*.${OLDEXT}" |
while read F
do
  NEWFILE="${F/%${OLDEXT}/${NEWEXT}}"
  echo "mv \"${F}\" \"${NEWFILE}\""
  mv -f "${F}" "${NEWFILE}"
done

#!/bin/bash

usage () {
    echo
    echo "Usage: `basename $0` <search dir> <old ext> <new ext>"
    echo
}
 
if [ -z "$3" ]; then
    usage
    exit 1
fi
 
OLDEXT=${2/#.}
NEWEXT=${3/#.}

find "${1}" -iname "*.${OLDEXT}" |
while read F
do
  NEWFILE="${F/%${OLDEXT}/${NEWEXT}}"
  echo "mv \"${F}\" \"${NEWFILE}\""
  mv -f "${F}" "${NEWFILE}"
done 
 
exit 0

#!/bin/bash

----------Dont know exactly but my code ---
touch > /tmp/newfilename
umask 077 && mkdir /tmp/tempdir.$$)
exit 2
----------------------------------------

usage () {
    echo
    echo "Usage: `basename $0` <search dir> <old ext> <new ext>"
    echo
}
 
if [ -z "$3" ]; then
    usage
    exit 1
fi
 
OLDEXT=${2/#.}
NEWEXT=${3/#.}

find "${1}" -iname "*.${OLDEXT}" |
while read F
do
  NEWFILE="${F/%${OLDEXT}/${NEWEXT}}"
  echo "mv \"${F}\" \"${NEWFILE}\""
  mv -f "${F}" "${NEWFILE}"
done 
 
exit 0

sh myshellscriptname.sh temporaryfolder temporaryfile filecase1 filecase2

#!/usr/bin/sh

#----------Dont know exactly but my code ---  # --- Isnt valid for comments...
touch  ./tmp/newfilename                             # So use <#>
umask 077 && mkdir ./tmp/tempdir.$$             # no ) at the end...
#exit 2                                                     # otherwise your program stops here!
#-----------------------------------------

usage () {
    echo
    echo "Usage: `basename $0` <search dir> <old ext> <new ext>"
    echo
}

if [ -z "$1" ]; then                             #  why $3? what about the other
    usage                                       #  expected arguments ?
    exit 1                                       #  at least now it will show up if you type
fi                                             # nothing more than the programs name...

OLDEXT=$2
NEWEXT=$3

echo  OLDEXT=$OLDEXT                         # when things dont work, display what you loaded
echo NEWEXT=$NEWEXT                         # in order to check you did initialize some VARs
                                              # and have an idea where you are in your code
                                              # at execution...

 NEWFILE="${F/%${OLDEXT}/${NEWEXT}}"