#!/bin/sh

#
# useradd: map unix useradd syntax to our usermod script syntax
#
# Author: Silvan Scherrer <silvan.scherrer@aroa.ch>
#
# This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
# WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#
# Synopsis
# --------
#
# This script mapps all needed parameters from useradd unix script to 
# our usermod script. Parameters unknown to usermod will be ignored.
#
# Usage
# -----
# > useradd [-c username] [-d userhome] [-u UID] [-g GID|Group] [-r]
# >         [-s shell] user
#
#
# Helpers

quit()
{
  exit $1
}

print_usage()
{
  print_version
  echo
  echo "Usage:"
  sed -n -e "s/useradd/${0##*/}/g" -e 's/^# > /  /p' < "$0"
  quit 255
}

print_version()
{
  echo "useradd script version $version"
  echo "Copyright bww bitwise works GmbH"
}


#
# Main.
#

version=0.1.0

# Parse command line.
while [ -n "$1" ] ; do
  case "$1" in
  -c) prev_opt=name
    ;;
  -d) prev_opt=homedir
    ;;
  -g) prev_opt=gid
    ;;
  -r) system_account=yes
    ;;
  -s) prev_opt=shell
    ;;
  -u) prev_opt=uid
    ;;
  -v|-verbose|--verbose) verbose=yes
    ;;
  -h|-help|--help) help=yes
    ;;
  -V|-version|--version) show_version=yes
    ;;
  -*) unknown="$unknown$unknown_sep$1"
      unknown_sep=', '
    ;;
  *)
    # If the previous option needs an argument, assign it.
    # else it's the user
    if [ -n "$prev_opt" ] ; then
      eval $prev_opt=\$1
      prev_opt=
    else
      user=$1
    fi
    ;;
  esac
  shift
done

if [ "$help" = "yes" -o "$user" = "" ] ; then
  show_version=no
  print_usage
fi

if [ "$show_version" = "yes" ] ; then
  print_version
fi

if [ "$verbose" = "yes" -a "$unknown" != "" ] ; then
  echo
  echo "unknown parameters: $unknown"
  echo
fi

# genarate the usermod parameters
if [ "$verbose" = "yes" ] ; then
  echo
  echo "Parameter:"
  echo "----------"
  echo "user   : $user"
fi

cmd="usermod -a \"$user\""

if [ -n "$name" ] ; then
  if [ "$verbose" = "yes" ] ; then
    echo "desc.  : $name"
  fi
  cmd="$cmd -c \"$name\""
fi

if [ -n "$shell" ] ; then
  if [ "$verbose" = "yes" ] ; then
    echo "shell  : $shell"
  fi
  cmd="$cmd -s $shell"
fi

if [ -n "$homedir" ] ; then
  if [ "$verbose" = "yes" ] ; then
    echo "homedir: $homedir"
  fi
  cmd="$cmd -d $homedir"
fi

if [ -n "$gid" ] ; then
  if [ "$verbose" = "yes" ] ; then
    echo "gid    : $gid"
  fi
  cmd="$cmd -g $gid"
fi

if [ -n "$uid" ] ; then
  if [ "$verbose" = "yes" ] ; then
    echo "uid    : $uid"
  fi
  cmd="$cmd -u $uid"
fi

if [ "$verbose" = "yes" ] ; then
  echo "cmd:      : $cmd"
fi

# in order to get " passed to REXX we need to go with cmd /c
cmd /c "$cmd"

quit 0