Changes between Initial Version and Version 1 of MetcheCleanScript

Timestamp:

04/10/13 21:16:50 (4 years ago)

Author:

chris

Comment:

--

MetcheCleanScript

@@ +1 @@
+This script was written as a result of the space that metche backups were taking on wiki:PuffinServer, see ticket:531.
+
+{{{
+#!/bin/bash
+
+# This script can find or delete files in $DIR older than $DAYS
+# which are not symlinks and are not linked to by symlinks in 
+# $DIR, it has been written to be run via cron to prevent metche 
+# using too much disk space.
+
+# Number of days worth of files to save
+DAYS=1
+
+# Directory where the files are
+DIR="/var/lib/metche"
+
+# check that the script is being run by root
+if [[ "$(id -u)" != "0" ]] ; then
+  echo "You must run $0 as root or via sudo" 
+  exit 2
+fi
+
+# Check that $DIR exists
+if [[ ! -d $DIR ]]; then
+  echo "The directory $DIR doesn't exist, please edit the DIR variable in $0 and try again" 
+  exit 2
+fi
+
+# Symlinks in $DIR 
+SYMLINKS=$(find $DIR -maxdepth 1 -type l)
+
+# Destinations of the symlinks | seperated
+for symlink in $SYMLINKS; do
+  # Get the destination of the symlink 
+  DESTPATH=$(readlink $symlink)
+  # Get the symlink filename
+  DESTFILE=$(basename $DESTPATH)
+  # If $SYMDEST doesn't exist then create it using the value of $DEST
+  # and if it does exist then add $DEST to it
+  if [[ ! $SYMDESTS ]]; then
+    SYMDESTS="$DESTFILE"
+  else
+    SYMDESTS="$SYMDESTS|$DESTFILE"
+  fi
+done
+
+# Change the space seperated list of symlinks to a | seperated one
+for symlink in $SYMLINKS; do
+  LINK=$(basename $symlink)
+  # If $LINKS doesn't exist then create it using the value of $LINK
+  # and if it does exist then add $LINK to it
+  if [[ ! $LINKS ]]; then
+    LINKS="$LINK"
+  else
+    LINKS="$LINKS|$LINK"
+  fi
+done
+
+# The symlinks and their destinations which we want to keep
+KEEPFILES=$(echo "$LINKS|$SYMDESTS")
+
+# Files older than $DAYS in $DIR
+OLDFILES=$(find $DIR -mtime +$DAYS -type f)
+
+# Delete files which are older than $DAYS and which 
+# are not listed in $KEEPFILES 
+if [[ $OLDFILES ]]; then
+  # Loop through the $OLDFILES
+  for file in $OLDFILES; do
+    # Remove the $DIR from $file
+    FILE=$(basename $file)
+    # $MATCH only has a value if $FILE is not in $KEEPFILES
+    MATCH=$(echo $FILE | egrep -v "^($KEEPFILES)$")
+    if [[ $MATCH ]]; then
+      # Check if there is a -d on the command line
+      if [[ $1 == "-d" ]]; then
+        # Delete the files if it's not in the $KEEPFILES list 
+        echo "Deleting $DIR/$FILE"
+        rm $DIR/$FILE
+      else
+        echo "Deletable file older than $DAYS days: $DIR/$FILE"
+      fi
+    fi
+  done
+else
+  echo "No deletable files older that $DAYS days found in $DIR" 
+fi
+
+# Check if there is a -d on the command line
+if [[ $1 != "-d" ]]; then
+  # We are not going to delete anything
+  echo "To remove deletable files run: $0 -d"
+fi
+}}}