Bulk File Generator

filegen

#!/usr/bin/env bash

barWidth=60       # constant
filePadding=8     # constant
extension="file"  # constant

count=$1
size=$2
resetFlag=$3

if [[ $* == *--help* || $* == *-h* || $# -eq 0 ]]
  then
  echo
  echo "Usage:"
  echo
  echo "    filegen [-h, --help]"
  echo "    filegen <count> <size> [options]"
  echo
  echo "Options:"
  echo "    -r, --reset : Deletes the currently existing files,"
  echo
  echo "Examples:"
  echo
  echo "    filegen 15000 20k"
  echo "        (15,000 files, each 20KB)"
  echo
  echo "    filegen 30 150m"
  echo "        (30 files, each 150MB)"
  echo
  echo "    filegen 6 1g"
  echo "        (6 files, each 1GB)"
  echo
  echo "Run 'man mkfile' for more information on creating files."
  echo
  exit 0
fi

if [ "$count" -le "0" ]
  then
  echo Count must be greater than zero.
  exit 1;
fi

if [[ $resetFlag == "-r" || $resetFlag == "--reset" ]]
  then
  echo Deleting previous files...
  rm -f *0.$extension
  rm -f *1.$extension
  rm -f *2.$extension
  rm -f *3.$extension
  rm -f *4.$extension
  rm -f *5.$extension
  rm -f *6.$extension
  rm -f *7.$extension
  rm -f *8.$extension
  rm -f *9.$extension
fi

function printBar ()
{
  index=$1
  totalBars=$2
  name=$3

  percentComplete=$(expr $(($index * 100)) / $totalBars)
  barsDone=$(expr $(($index * $barWidth)) / $totalBars)
  barsLeft=$(($barWidth - $barsDone))

  [[ $barsDone -gt 0 ]] && barDone=$(printf "="'%.s' $(eval "echo {1.."$(($barsDone))"}"))
  [[ $barsDone -eq 0 ]] && barDone=""

  [[ $barsLeft -gt 0 ]] && barLeft=$(printf "."'%.s' $(eval "echo {0.."$(($barsLeft))"}"))
  [[ $barsLeft -eq 0 ]] && barLeft=""

  echo -ne "[$barDone$barLeft] $name ($percentComplete%)            \r"
}

echo Creating $count files each with a size of $size...

for i in `seq 1 $(expr ${count} + 0)`; do
    filename=$(printf "%0${filePadding}d.${extension}" $i)

    [ -f "${filename}" ] || mkfile -n $size $filename

    printBar $i $count $filename

done

printBar $count $count "Complete!"

echo -ne '\n'