#! /bin/sh
#
# Add a new user to loki
# Created on 09-10-99
# admin@wickedmind.com
# 
# Make sure only root user can run the script
if [ `id -u` != 0 ]; then
 echo "ERROR: Only Superuser may add users. Sorry."
 exit 1
fi
#
# Check if useradd exists on the system.
if [ "`/usr/bin/which useradd|awk '{print $2}'`" = no ]; then
  echo "ERROR: Required program [useradd] not found. Cannot continue."
  exit 1
fi
#
# If no arg, then print usage
if [ $# = 0 ]; then
 echo "Usage: `basename $0` [user]"
 exit 0
fi
#
# Check if user exists on the system
_USER=`grep $1 /etc/passwd|awk -F : '{print $1}'`
if [ "$_USER" = "$1" ]; then
 echo "ERROR: User $1 already exists. Use a different login name." 
 exit 1
fi
#
# Clear the screen and print a header when we start
/usr/bin/tput clear

cat <<EOF

* Adding new user to loki 
* Press ^C at any time to bail out.

EOF
#
# Get first avilable UID, and check that entered UID is not in use.
#
_UID=`tail -1 /etc/passwd |awk -F : '{print $3 + 1}'`
echo -n "Enter UID: [$_UID] "
 read _UIDOK
  if [ "$_UIDOK" = "" ]; then
    _UIDOK=$_UID
  elif [ "`grep $_UIDOK /etc/passwd | awk -F : '{print $3}'`" = "" ]; then
    _UIDOK=$_UID
  else  
   echo "ERROR: UID in use! Hit RETURN to retry or ^C to bail out."
    read dummy
    $0 $1
  fi
#
# Get group "users" GID, this is the default in Slackware
_GID=`grep users /etc/group |awk -F : '{print $3}'`
echo -n "Enter GID: [$_GID] "
 read _GIDOK
  if [ "$_GIDOK" = "" ]; then
   _GIDOK=$_GID
  elif [ "`grep $_GIDOK /etc/group`" = "" ];then
   # Print an error and exit if GID not present. It is IMHO better to do
   # this manually than letting the script do it.
   echo "ERROR: Group $_GIDOK does not exist! Add it to /etc/group first."
   exit 0
  fi
#
# Get users home directory
echo -n "Enter home directory: [/home/$1] "
 read _HOME
  if [ "$_HOME" = "" ]; then
   _HOME="/home/$1"
  fi
#
# Get users default shell
echo -n "Enter login shell: [/bin/bash] "
 read _SHELL
  if [ "$_SHELL" = "" ]; then
   _SHELL=/bin/bash
  fi
#
# Check /etc/shells for entry
if [ "`grep $_SHELL /etc/shells`" = "" ]; then
  echo -n "[$_SHELL] not in /etc/shells, add it now? [y/n] "
  read _ADD_SHELL
   if [ "$_ADD_SHELL" = y ]; then
    echo "$_SHELL" >> /etc/shells
   fi
fi
#
# Get comment/real name
echo -n "Enter real name: [no default] "
read _REALNAME
#
# Expire date
echo -n "Enter expire date: [MM/DD/YY] "
read _EXPIRE
#
# Clear the screen and print what's been entered.
/usr/bin/tput clear
echo ""
echo "This in the information you entered:"
echo ""
echo "User ID is: [$_UIDOK]"
echo "Group ID is: [$_GIDOK]"
echo "Home is: [$_HOME]"
echo "Login shell is: [$_SHELL]"
echo "Real name is: [$_REALNAME]"
echo "Expire date is: [$_EXPIRE]"
echo
echo -n "Is the above correct? (y/n) "
read _verify
 if [ "$_verify" = n ]; then
  echo -n "Try Again? (y/n) "
   read _retry
    case $_retry in
         [Yy]*)	$0 $1 ;;
	 *)	exit ;;
    esac
 else # This is where it really happens :-)
  echo "Adding user $1 to system:"
  echo
  useradd -u $_UIDOK -g $_GIDOK -d $_HOME -s $_SHELL -c "$_REALNAME" -e "$_EXPIRE" $1 && \
  cp -r /etc/skel $_HOME && \
  chown -R $_UIDOK:$_GIDOK $_HOME && \
  passwd $1 && \
  echo "User $1 [$_REALNAME] added on `date`" >> /var/adm/newuser.log && \
  finger -m $1 |head -2 && \
  sleep 3 && \
  cat <<EOF |mail -s"Welcome to `hostname`" $1 && \

Hello $1 and welcome as a new user to `hostname`.
If you have any questions, please direct them to
support@`hostname`.`domainname`. Normal disk quota is 10Mb.

/System Admin

EOF
echo "User $1 successfully added to system!"
fi 

# All Done..