(Linux Bash Scripting Question)

The following completed code is for a script called "createuser" that has the following functions:

#!/bin/bash

if [ $# -eq 0 ]; then

echo "createuser: usage: createuser [-p] [-d path] [newuserid]"

fi

DFLAG=false

PFLAG=false

USERDIR=''

USERID=''

while [ $# -ne 0 ]; do

case $1 in

-*p*)PFLAG=true

;;&

-*d) if [ $# -gt 1 ]; then

DFLAG=true

USERDIR=$2

shift

fi

;;

-*);;

*)USERID=$1

esac

shift

done

if [ "$USERID" = '' ]; then

echo "createuser: No userid entered" 1>&2

exit 1

fi

getent passwd $USERID 1>/devull 2>&1

if [ $? -eq 0 ]; then

echo "createuser: user '"$USERID"' already exists"

fi

if [ $DFLAG = false ]; then

USERDIR='/home/'$USERID

fi

useradd -d$USERDIR -m $USERID

if [ $PFLAG = true ]; then

passwd $USERID

fi

For the above code, kindly add to the code to include the following:

For part (b), the code has to work with both -d/path/to/dir and -pd/path/to/dir. Back references and BASH_REMATCH can be used for it and it will take slightly less code in the script, as that will simply be a variable assignment. Substrings can also be used, however, it might be more complicated to cover both circumstances.

createuser which creates a new user account. The script will give an error message if the userid already exists or if a userid is not provided. The script will create the new user's home directory, set ownership & permissions correctly. The script will copy the contents of /etc/skel into the new directory The script will handle the following flags: Option Description -d Path for home directory. If -d is not specified the home directory is created at /home/userid. -P Prompt for password. If -p is not specified the password should be left blank. (b) The -d flag will now support the following forms two (2) forms: i. createuser -d/path/to/dir (no space between the d and the path) ii. createuser -d /path/to/dir (c) Use regular expression to ensure that the path for -d is an absolute path. Output an error message if the path is not an absolute path