Perl Program

You must write a Perl program that will provide a listing of files in a directory.

The files must be listed in sorted order by the file name.

By default, the program displays only file names.

By default, the program lists the files in the current directory.

The program must provide the following command line options to the user:

o d [directory]: This option allows the user to specify a directory or

no directory name. If the -d option is provided without specifying a

directory name, list your current directory (~student user

name/itec400/homework). The output shall be displayed using the

following column headers:

File Name Size Owner Group

o l: This option instructs the program to display a long listing. The output

shall display the following column headers:

File Name Size Owner Group

* The user selects no options. List the file names under your current

directory (~student user name/itec400/homework). The output shall

display the following column header:

File Name

The script file name must be: listdir.pl

Sample Output

User selects no options (provide column header and list file names):

> listdir.pl

File Name

4th

4th_log

4th.old

4th.old.2

address.cpp

address.h

address.o

User selects -l option (only subset of output isshow):

> listdir.pl -l

File Name

OUTPUT HERE

Size Owner Group

User selects -d option.

> listdir.pl d

File Name Size Owner Group

OUTPUT HERE

User selects -d option without specifying a directory name.

> listdir.pl d

File Name Size Owner Group

OUTPUT HERE

User selects -l and -d option (./listdir.pl l d )

> listdir.pl -l -d

/export/home/dandrear/temp OUTPUT

HERE

User selects -d and -l option (illegal combination):

> listdir.pl -d l

Standard output:

Usage: listdir.pl [-d directory name][-l]

listdir.pl [-l] [-d directory name]

listdir.pl [-d directory]

listdir.pl [-d] listdir.pl [-l]

NOTE: All other options are invalid for usage.