start-stop-daemon on an inotify script

[Andreas Leha <andreas.leha@med.uni-goettingen.de>]

Hi all,


(cross-post from here:
http://superuser.com/questions/571416/start-stop-daemon-on-an-inotify-scripti)



I am on debian squeeze.

Consider this stripped down script (placed at
/usr/local/bin/testinotify) around inotifywait:

#+begin_src sh
  #!/bin/bash
  
  WATCHDIR="/tmp/testinotify"
  
  inotifywait -mr --timefmt '%d/%m/%y %H:%M' --format '%T %w %f' \
      -e modify -e create -e close_write \
      "$WATCHDIR"  | while read date time dir file; do
  
      FILECHANGE=${dir}${file}
  
      chgrp users "$FILECHANGE"
      chmod g+rw "$FILECHANGE"
      if [ -d "$FILECHANGE" ]; then
          chmod g+x "$FILECHANGE"
      fi
      echo "At ${time} on ${date}, file $FILECHANGE was chmodded" >> "$1"
  done
#+end_src

If I run this "by hand" via
  testinotify /var/log/testinotify.log
everything works as expected.

Here is my question: If I run this via start-stop-daemon as in
  PIDFILE=/var/run/testinotify.pid && DAEMON=/usr/local/bin/testinotify && LOGFILE=/var/log/testinotify.log && start-stop-daemon --start --quiet --oknodo --pidfile "$PIDFILE" --make-pidfile --startas "$DAEMON" -- $LOGFILE &
I get two instances of my script running.


Why is that and how can I avoid that?


The bad effect is, that killing the process with pid recorded by
start-stop-script is not even stopping the inotifywait.

Regards,
Andreas