Apply patches from a text file of urls onto a xen server

applyPatches.sh

#!/bin/bash

function failOnError {
   RETVAL=$1
   ErrorText=$2
   if [[ $RETVAL -ne 0 ]]; then
     echo $2
     exit $RETVAL
   fi
}

for url in `cat patch_urls.txt`; do
   echo "--------------------------------------------------"
   mkdir tmp
   pushd tmp
      echo "###  Downloading and applying $url..."
      wget --no-check-certificate $url -O patch.zip
      failOnError $? "wget failed: $url"
      echo "###  Unzipping...."
      unzip patch.zip
      failOnError $? "unzip failed"
      file=`ls *.xsupdate`
      echo "###  Uploading patch..."
      UUID=`xe patch-upload file-name=$file`
      failOnError $? "xe patch-upload file-name=$file [FAILED]"
      echo "###  Applying patch to the pool..."
      xe patch-pool-apply uuid=$UUID
      failOnError $? "xe patch-pool-apply uuid=$UUID [FAILED]"
   popd
   echo "###  Deleting tmp dir and /var/patch file..."
   rm -rf tmp
   find /var/patch/ -maxdepth 1 -type f -exec rm -f {} \;
done