#!/bin/bash

# adduser--Adds a new user to the system, including building their
#          home directory, copying in default config data, etc.
#          For a standard Unix/Linux system, not Mac OS X.

setglobal pwfile = '"/etc/passwd'"    
setglobal shadowfile = '"/etc/shadow'"
setglobal gfile = '"/etc/group'"
setglobal hdir = '"/home'"

if test $[id -un] != "root"  {
  echo "Error: You must be root to run this command." > !2
  exit 1
}

echo "Add new user account to $[hostname]"
echo -n "login: "     ; read login

# The next line sets the highest possible user ID value at 5000,
#   but you should adjust this number to match the top end 
#   of your user ID range.

setglobal uid = $[awk -F: '{ if (big < $3 && $3 < 5000) big=$3 } END { print big + 1 }' $pwfile]
setglobal homedir = "$hdir/$login"

# We are giving each user their own group, so gid=uid
setglobal gid = $uid

echo -n "full name: " ; read fullname
echo -n "shell: "     ; read shell

echo "Setting up account $login for $fullname..."

echo $(login):x:$(uid):$(gid):$(fullname):$(homedir):$shell >> $pwfile
echo $(login):*:11647:0:99999:7::: >> $shadowfile

echo "$(login):x:$(gid):$login" >> $gfile

mkdir $homedir
cp -R /etc/skel/.[a-zA-Z]* $homedir
chmod 755 $homedir
chown -R $(login):$(login) $homedir

# Setting an initial password
exec passwd $login