#!/bin/sh
# version 0.1 20121209 iNetCom/Jan Holler

login=$1
uid=$2

passwdf="/etc/passwd"
passwdfmin="/etc/passwd-"
shadowf="/etc/shadow"
shadowfmin="/etc/shadow-"
groupf="/etc/group"
smbpasswdf="/etc/samba/smbpasswd"
homerootdir="/home"
shell="/bin/ash"

echo "Add a new user:"
if [ "$1" != "" ] ; then
  login=$1
else
  echo -n "login: " ; read login
fi

# change '5000' for the top end of your allowed uids
username=`grep $login $passwdf|awk -F : '{print $1}'`
if [ "$username" = "$login" ]; then                               
  echo "ERROR: The user $login already exists, so please use a different login name."
  exit 1
else
  echo "using username: $login"
fi

if expr "$2" : '-\?[0-9]\+$' >/dev/null ; then
  uid=$2
else
  uid="$(awk -F: '{ if (big < $3 && $3 < 5000) big=$3 } END { print big + 1 }' $passwdf)"
  # set to new user layout (fedora) starting uids from 1000 on
  if [ $uid -lt 1000 ] ; then
    uid=1000
  fi
fi
userid=`grep $uid $passwdf|awk -F : '{print $1}'`
if [ "$userid" = "$uid" ]; then
  echo "ERROR: The userid $uid already exists, so please use a different userid."
  exit 1
else
  echo "using uid/guid: $uid"
fi

homedir=$homerootdir/$login

# gid=uid as in Fedora
gid=$uid

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

if [ "$fullname" = "" ] ; then
  fullname=$login
fi

echo ${login}:x:${uid}:${gid}:${fullname}:${homedir}:$shell >> $passwdf
echo ${login}:*:${uid}:${gid}:${fullname}:${homedir}:$shell >> $passwdfmin
echo ${login}:*:11647:0:99999:7::: >> $shadowf
echo ${login}:*:11647:0:99999:7::: >> $shadowfmin

echo "${login}:x:${gid}:$login" >> $groupf

if [ ! -d "$homerootdir" ]; then
  mkdir  $homerootdir
fi
if [ ! -d "$homedir" ]; then
  mkdir $homedir
fi

#cp -R /etc/skel/.[a-zA-Z]* $homedir
chmod 755 $homedir
find $homedir -print | xargs chown ${login}:$login

passwd $login

exit 0