unRAID mover script

mover

#!/bin/bash

# This is the 'mover' script used for moving files from the cache disk to the
# main array.  It is typically invoked via cron.

# After checking if it's valid for this script to run, we check each of the top-level
# directories (shares) on the cache disk.  If, and only if, the 'Use Cache' setting for the
# share is set to "yes", we use 'find' to process the objects (files and directories) of
# that directory, moving them to the array.

# The script is set up so that hidden directories (i.e., directory names beginning with a '.'
# character) at the topmost level of the cache drive are also not moved.  This behavior can be
# turned off by uncommenting the following line:
# shopt -s dotglob

# Files at the top level of the cache disk are never moved to the array.

# The 'find' command generates a list of all files and directories on the cache disk.
# For each file, if the file is not "in use" by any process (as detected by 'fuser' command),
# then the file is copied to the array, and upon success, deleted from the cache disk.
# For each directory, if the directory is empty, then the directory is created on the array,
# and upon success, deleted from the cache disk.

# For each file or directory, we use 'rsync' to copy the file or directory to the array.
# We specify the proper options to rsync so that files and directories get copied to the
# array while preserving ownership, permissions, access times, and extended attributes (this
# is why we use rsync: a simple mv command will not preserve all metadata properly).

# If an error occurs in copying (or overwriting) a file from the cache disk to the array, the
# file on the array, if present, is deleted and the operation continues on to the next file.

# Only run script if cache disk enabled and in use
if [ ! -d /mnt/cache -o ! -d /mnt/user0 ]; then
  exit 0
fi

# If a previous invokation of this script is already running, exit
if [ -f /var/run/mover.pid ]; then
  if ps h `cat /var/run/mover.pid` | grep mover ; then
      echo "mover already running"
      exit 0
  fi
fi
echo $$ >/var/run/mover.pid
echo "mover started"

cd /mnt/cache
shopt -s nullglob
for Share in */ ; do
  if grep -qs 'shareUseCache="yes"' "/boot/config/shares/${Share%/}.cfg" ; then
    echo "moving \"${Share%/}\""
    find "./$Share" -depth \( \( -type f ! -exec fuser -s {} \; \) -o \( -type d -empty \) \) -print \
      \( -exec rsync -i -dIWRpEAXogt --numeric-ids --inplace {} /mnt/user0/ \; -delete \) -o \( -type f -exec rm -f /mnt/user0/{} \; \)
  else
    echo "skipping \"${Share%/}\""
  fi
done

rm /var/run/mover.pid
echo "mover finished"