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#!/bin/bash
 
# exctute
# ./mod.sh file_type input_folder output_folder
# ./mod.sh *.txt /tmp /data/
 
# paramater count
if [ ! $# -eq 3 ]; then
  echo "[ERROR] error paramater."
  exit
fi
 
# file type
file_type="${1}"
 
# input foloder
if [ -d "${2}" ]; then
  folder="${2}"
else
  echo "[ERROR] input folder is not exsit."
  exit
fi
 
# output folder
if [ -d "${3}" ]; then
  output="${3}"
else
  echo "[ERROR] output folder is not exsit."
  exit
fi
 
# search file
find ${folder} -name "${file_type}" | while read filename ;
do
  # file type
  file_type=`echo ${filename##*.}`
 
  # file size
  file_size=`stat "${filename}" | sed -n '2,1p' | awk '{print $2}' `
  # file modify time
  file_modify=`stat "${filename}" | sed -n '6,1p' | awk '{print $2, $3}' | sed -e 's/[-: ]//g' `
 
  # output folder
  path="${output}/${file_modify:0:6}"
  if [ ! -d "${path}" ]; then
    mkdir -p ${path}
    echo "folder(${path}) is created . "
  fi
 
  # new file full name
  new_file_name=`echo ${path}/${file_modify}_[${file_size}].${file_type}`
 
  if [ ! -f "${new_file_name}" ]; then
    mv "${filename}" "${new_file_name}"
  else
    echo "file(${new_file_name}) is exsit, can not be removed. "
  fi
done
echo "finished !"
exit