#!/bin/sh

SRC="$1"
DST="$2"

# Check input parameters
if [ $# -lt 2 ]; then
  echo "$0 <src> <dest>"
  exit 2
fi

# Check that the source file exists
if [ ! -e $SRC ]; then
  echo "$SRC not found"
  exit 2
fi
 
if [ ! -e $DST ]; then
  echo "cp $SRC $DST"
  cp $SRC $DST
else
  # Check that we have the 'stat' binary. If not, we don't do the copy.
  which stat > /dev/null

  if [ $? -eq 1 ]; then
    echo "warning: stat not found, no comparison can be made"
    exit 0
  fi

  SRCT=$(stat -c %Y $SRC)
  DSTT=$(stat -c %Y $DST)
  if [ $DSTT -lt $SRCT ]; then
    echo "cp $SRC (time=$SRCT) $DST (time=$DSTT)"
    cp -f $SRC $DST
  fi
fi