code.delx.au - mediapc-tools/blob - monitor-dir

   1 #!/bin/bash -e
   2
   3 # Use with crontab entry like:
   4 #   */5 *   *   *   *     $HOME/bin/monitor-dir /path/to/something
   5
   6 if [ -z "$1" ]; then
   7     echo "Usage $0 dir [monitor_file] [ls]"
   8     exit 1
   9 fi
  10 mon="${2:-$1/.monitor_dir}"
  11 mon_tmp="${mon}_tmp"
  12
  13 ${3:-ls} "$1" > "$mon_tmp"
  14 if [ -r "$mon" ] && ! cmp -s "$mon" "$mon_tmp" && [ -n "$(ls "$1")" ]; then
  15     comm -13 "$mon" "$mon_tmp"
  16 fi
  17 mv "$mon_tmp" "$mon"
  18