#!/bin/bash
#<pre><b>
# Script     : emailaddr
# Version    : 1.0
# Author     : Roland Rashleigh-Berry
# Date       : 30-Nov-2004
# Purpose    : Production script to create an email address out of a Unix userid
# SubScripts : getname gethome
# Notes      : You have to hope that the full name of the user as held in the
#              passwd file matches the form used in the Lotus Notes database.
#              If it does not then you need an .emailaddr file in the person's
#              home directory and the first non-comment line with a '@' in it
#              will be assumed to be the email address to send to.
# Usage      : emailaddr userid
#              emailaddr -i userid
#              sendto=$(emailaddr userid)
#===============================================================================
# OPTIONS:
#-opt- -------------------------------description--------------------------------
#  i   (switch) ignore whatever is in .emailaddr                                 
#===============================================================================
# PARAMETERS:
#-pos- -------------------------------description-------------------------------
#  1   userid
#===============================================================================
# AMENDMENT HISTORY:
# init --date-- mod-id ----------------------description------------------------
# 
#===============================================================================
# This is public domain software. No guarantee as to suitability or accuracy is
# given or implied. User uses this code entirely at their own risk.
#===============================================================================

# Define give-usage-message-then-exit function
usage () {
  echo "Usage: emailaddr userid" 1>&2
  exit 1
}


# defaults
switchi=0


# "case" statement for action to take on selected options
while getopts "i" param ; do
  case $param in
   "?") # bad option supplied
        usage
        ;;
   "i") # ignore .emailaddr file
        switchi=1
        ;;
  esac
done



# shift to bring first parameter to position 1
shift $(($OPTIND - 1))


# One userid required
if [ $# -ne 1 ] ; then
  echo "Error: (emailaddr) One userid must be specified" 1>&2
  usage
fi


emailaddr=

# if ignore .emailaddr switch not set then try to find it
if [ $switchi -eq 0 ] ; then
  # file name in user's home area for the override email address if it exists
  emailfile=$(gethome $1)/.emailaddr

  # see if there is a suitable email address line in there
  emailaddr=$(grep -v '^#' "$emailfile" 2>/dev/null | grep '@' | head -1)
fi


# echo the email address if found otherwise construct it
if [ -n "$emailaddr" ] ; then
  echo "$emailaddr"
else
  echo $(getname "$1" | tr ' ' '.')@xx.xxxxxxx.com
fi