#!/bin/sh
lastFn=/var/log/$USER/${1-<platform>}.odss
url=$1
[ "$url" ] || {
  cat 2>&1 <<END
`basename $0` is a wrapper around iridiumODSS to avoid redundant updates
by storing Iridium time [i.e. hexadecimal frame number] of most recent update in:
  $lastFn

END
iridiumODSS

  exit 2
}
export lastUpdate=`cat $lastFn 2>/dev/null`
[ "$lastUpdate" ] || lastUpdate=0
last=`iridiumODSS "$@"` && [ "$last" ] && echo "$last" > $lastFn