2023 The student is to modify the script student example p3 following the instructions in the script | Assignment Collections

The student is to modify the script student example p3 following the instructions in the script.
The purpose of this script is to change the name of files/directories with spaces in the name to have a dash(-). So if a file/directory were named “A B”, the new name would be A-B. The script will work on a directory specified on the command line and replace the spaces in the names for all files/directories underneath that directory.
The options to the script are as follows:
-f the -f says to only rename files
-d the -d says to only rename directories
Both -d and and -f may be specifed.
the name of the directory that you will be processing.
For example:
Given the following
$ ls
C D/ dirs.tar fix-spaces*
And the directory “C D” contained the following structure
./C D
./C D/E F
./C D/E F/G H
./C D/E F/G H/J K
./C D/E F/G H/J K/a b
./C D/E F/G H/a b
./C D/E F/a b
./C D/a b
After the script was run,
fix-space -f -d “C D”
the directory structure would be as follows:
C-D
C-D/E-F
C-D/E-F/G-H
C-D/E-F/G-H/a-b
C-D/E-F/G-H/J—-K
C-D/E-F/G-H/J—-K/a-b
C-D/E-F/a-b
C-D/a-b
Here is a copy of the script – it is alos as an attachment in both UNIX and Windows format.

#!/usr/bin/ksh

USAGE=”$0 -f directory
$0 -d directory
$0 -d -f directory

-f rename files
-d rename directories
“

usage ()
{
print -u2 “$USAGE”
exit 1
}

pathname ()
{
# function provided for the student
print — “${1%/*}”
}

basename ()
{
# function provided for the student
print — “${1##*/}”
}

find_dirs ()
{
# function provided for the student
find “$1” -depth -type d -name ‘* *’ -print
}

find_files ()
{
# function provided for the student
find “$1” -depth -type f -name ‘* *’ -print
}

my_rename()
{
# the student must implement this function to my_rename
# $1 to $2
# The following error checking must happen:
# 1. check if the directory where $1 resided is writeable,
# if not then report an error
# 2. check if “$2” exists -if it does report and error and don’t
# do the mv command
# 3. check the status of the mv command and report any errors
: # remove this line after the function is coded
}

fix_dirs ()
{
# The student must implement this function
# to actually call the my_rename funtion to
# change the name of the directory from having spaces to
# changing all of the spaces to -‘s
# if the name were “a b”, the new name would be a-b
# if the name were “a b” the new name would be a—-b
: # remove this line after the function is coded
}

fix_files ()
{
# The student must implement this function
# to actually call the my_rename funtion to
# change the name of the file from having spaces to
# changing all of the spaces to -‘s
# if the name were “a b”, the new name would be a-b
# if the name were “a b” the new name would be a—-b
: # remove this line after the function is coded
}

WFILE=
WDIR=
DIR=

if [ “$#” -eq 0 ]
then
usage
fi

while [ $# -gt 0 ]
do
case $1 in
-d)
WDIR=1
;;
-f)
WFILE=1
;;
-*)
usage
;;
*)
if [ -d “$1” ]
then
DIR=”$1″
else
print -u2 “$1 does not exist …”
exit 1
fi
;;
esac
shift
done

# The student must implement the following:
# – if the directory was not specified, the script should
# print a message and exit

# – if the Directory specified is the current directory, the script
# print a error message and exit

# – if the directory specified is . or .. the script should print
# an error message and exit

# – if both -f and -d are not specified, the script should print a
# message and exit
#

if [ “$WDIR” -a “$WFILE” ]
then
fix_files “$DIR”
fix_dirs “$DIR”
elif [ “$WDIR” ]
then
fix_dirs “$DIR”
elif [ “$WFILE” ]
then
fix_files “$DIR”
fi