#!/bin/sh
# mkhostgroup host-template group-template services...
#
# Read stdin for a list of hosts, create a host entry for each based on
# host-template, put each in a group based on group-template, and add each
# to a service entry based on each service template.
#
# This script uses findparent, from the nscc distribution, for UTCS.

if [ $# -lt 2 ]; then
    echo "Usage: $0 host-template group-template [services]... <[list of hosts]"
    exit 1
fi

hosttemplate="$1"; shift
grouptemplate="$1"; shift

cat <<EOF
# This file automatically generated by: mkhostgroup $hosttemplate $grouptemplate $*
# DO NOT EDIT

EOF

members=""
while read j
do
  # Ignore the host if it does not have an address
  address=`host $j` || continue
  address=`echo $address | sed 's/.* //'`
  # Add to the group member list
  if [ -z "$members" ]; then
      members="$j"
  else
      members="$members,$j"
  fi
  # Print the host and basic service entry
  cat <<EOF
define host {
	host_name $j
	alias     $j
	address	  $address
	use	  $hosttemplate
}

EOF
  # If the host has a defined parent, print a dependency
  parent=`findparent $j`
  test -n "$parent" && {
      cat <<EOF
define hostdependency {
        host_name                     $parent
        dependent_host_name           $j
        notification_failure_criteria d,u
}

EOF
  }
done

if [ -n "$members" ]; then
    # Print the group membership
    cat <<EOF
define hostgroup {
	use	$grouptemplate
	members	$members
}	

EOF

    # Print any entire-group services
    while [ -n "$1" ]
      do
      service="$1"; shift
      cat <<EOF
define service {
        use             $service
        host_name       $members
}

EOF
    done
fi