unrar_compare_extracted_fsize.sh

#!/bin/bash

# --------------------------------------------------------------- #
# Make sure that all files in the archive are extracted correctly
# by comparing the filesize inside the archive with the extracted
# file in the directory.
# --------------------------------------------------------------- #
# TODO: Test with nested files
# --------------------------------------------------------------- #
function unrar_compare_extracted_fsize(){
VERBOSE=0
# Define RarFile
rarfile="${1}"
# Extract all Filenames from rarfile
files_in_rar=$(unrar l "${rarfile}" | grep '\.\..*' | awk '{ print $5 }')
# Extract Size+Filenames from rarfile
files_in_rar_with_size=$(unrar l "${rarfile}" | grep '\.\..*' | awk '{ print $2, $5 }')
# Define Variable for Success and set it to true by default
# If any file is not found or the sizes do not match,
# it should be extracted again.
ALL_OK=TRUE
# Iterate over filenames
while read -r fname; do
# check if a file exists
  if [ -f "${fname}" ]; then
    # check if filesize matches with the one in the rarfile
    fsize=$(stat --printf="%s" ${fname})
    rsize=$(echo "${files_in_rar_with_size}" | grep "${fname}" | awk '{ print $1 }')
    if [ ${fsize} -eq ${rsize} ]; then
      [ VERBOSE ] && echo "Extracted-File-Size of ${fname} is equal to Rared-File-Size [ ${fsize} / ${rsize} ]"
    else
      ALL_OK=FALSE
    fi
  else
    ALL_OK=FALSE
  fi
done <<< "${files_in_rar}"
# Output result
if [ ALL_OK ]; then
  [ VERBOSE ] && echo "All extracted files appear to be ok."
  return 0
else
  [ VERBOSE ] && echo "Some Files are not Extracted or do not match the size."
  return 1
fi
}