#!/bin/sh

# Detect when file named by param $1 changes.
# When it changes, do command specified by other params.

F=$1
shift
P="$*"

# Result of inotifywait is put in S so it doesn't echo
while  S=$(inotifywait -eMODIFY $F 2>/dev/null)
do
  printf "At %s: \n" "$(date)"
  $P
done