#!/bin/sh

# Pay attention!!! This isn't meant for a complete rewrite of the Linux
# passwd file!!! You should keep your mission-critical entries in the 
# BSD passwd file (like root, wheel, etc.), and replace only those
# non-critical, like the domain names which have an account. This is because
# this script changes the UIDs, GIDs of the users by default. Of course,
# with a little hacking, you could do it make a complete exporting.

# DOn't forget to run 'pwd_mkdb' after you have exported the files.


linux_passwd_file=$1
linux_shadow_file=$2
bsd_passwd_file=$3
bsd_master_file=$4

if [ -z "$1" ]
  then
   error=1
fi

if [ -z "$2" ]
  then
   error=1
fi

if [ -z "$3" ]
  then
    error=1
fi


if [ -z "$4" ]
  then
    error=1
fi

if [ "$error" -eq "1" ]
  then
  echo ""
  echo " Usage: $0 Linux_passwd Linux_shadow BSD_passwd BSD_master"
  echo " Where: "
  echo "  - Linux_passwd is the Linux passwd file"
  echo "  - Linux_shadow is the Linux shadow file"
  echo "  - BSD_passwd is the BSD passwd file (will be created/overwritten)"
  echo "  - BSD_master is the BSD master file (will be created/overwritten)"
  echo ""
  echo " I will not assume any responsability for any harm this script 
         will do on your system"
  echo ""
  exit
fi

# I define only one general GID for all the domains.
group_id=5000

user_name=`cat $linux_passwd_file | cut -f 1 -d ":"`

j=0
for i in $user_name
 do
  j=$(($j + 1))
  user_id=$j
  one_line_passwd=`cat $linux_passwd_file | grep "$i:" | head -n 1`
  full_user_name=`echo $one_line_passwd | cut -f 5 -d ":"`
  user_name_without_TLD=`echo $i | cut -f 1 -d "."`
  home_directory=`echo $one_line_passwd | cut -f 6 -d ":"`
  default_shell=`echo $one_line_passwd | cut -f 7 -d ":"`
  one_line_shadow=`cat $linux_shadow_file | grep "$i:" | head -n 1`
  password=`echo $one_line_shadow | cut -f 2 -d ":"`

  #if [ "$password" = "*" ]
  #  then
  #    password="!"
  #fi

  # Now I'm creating the password file in BSD format (master.passwd)
  echo $user_name_without_TLD:$password:$user_id:$group_id::0:0:$full_user_name:$home_directory:$default_shell >> $bsd_master_file
  # And now I'm creating the password file in plain Unix passwd format (w/o passwords in it)
  echo $user_name_without_TLD:\*:$user_id:$group_id:$full_user_name:$home_directory:$default_shell >> $bsd_passwd_file
done