Homework & Coursework Questions

#!/bin/ksh
# root check code below
#deptroot=/home
deptroot=/home/wolverines
i=0
dept=()
echo "Department:"
find $deptroot -maxdepth 1 -type d | sort | while read x ;do
    bn=$(basename "$x");
    dept[$i]="$bn"
    i=$(($i + 1))
    echo "$i) $bn"
done
echo ""
echo -n "Enter number of department or 'n' for new department: "
read ans
echo "${dept[*]}"
if [[ "$ans" =~ ^[0-9]+$ ]]; then
    echo "Numeric $ans $i"
    if [ $ans -lt $i ]; then 
       echo "In range"
       d="${dept[$(($ans - 1))]}"
       echo "Department: $d"
    fi
elif [ "$ans" == "n" ]; then
    echo "Prompt for new department"
    # assign d=DEPARTMENT
    # make sure it doesn't exist.. if exists exit
    # groupadd $d
    # mkdir "$depthome/$d"
    # chgrp $d "$depthome/$d"
else
    echo "bad input"
    exit 1
fi

$ ./test.sh 
Department:
1) History
2) Math
3) PhysEd
4) Science
5) Zoology

Enter number of department or 'n' for new department: 3
History Math PhysEd Science Zoology
Numeric 3 5
In range
Department: PhysEd

if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

if [ "$(id -u)" != "0" ]; then
    echo "This script must be run as root" 1>&2
    exit 1
fi

egrep -q "^$username:" /etc/passwd
if [ $? -eq 0 ]; then
    echo "found"
fi

i=$userid
i=$(($i + 1))
#OR
let i=$userid
let i=++i;

# if $dept doesn't exist
#   create new group with 'groupadd'
#   gid = dept's GID
#   create dir for dept
#   'chgrp' for dir of dept
# else
#   gid = dept's GID
# fi
useradd -m -d "/home/$dept/$user" -g $gid -K UMASK=026
passwd $user