backup specified file to under /USER_HOME/backup/ directory.

backupTool.sh

########################################################################
#
# Script Name:
# backupTool.sh
# 
# Project:
# Miscellaneous
#
# Execute User: any user you want
#
# crontab
# No Entry
#
# Description:
# backup specified file to under /USER_HOME/backup/ directory.
# when backup, convert '/' to '__' (double underscore) in backup file full path.
# backup file suffix is '_YYYYMMDDHHMMSS.backup' (e.g. _20120605150200.backup).
#
# Usage:
# ./backupTool.sh BACKUP_FILE_NAME (exists current directory)
# ./backupTool.sh -f BACKUP_FILE_NAME (specify full path)
#
# Advaned Usage:
# in ~/.bashrc
# alias bk='~/backupTool.sh'
#
# Last Update: 2012/06/13
#
# Authored by Go Sato (ZOOM DESIGN)
#
########################################################################


#!/bin/bash


# ======================================================================
# Preparation
# ----------------------------------------------------------------------
# Nothing to do.
# ======================================================================


# ======================================================================
# Environment Variables
# ----------------------------------------------------------------------
BACKUP_TIME=`date '+%Y%m%d%H%M%S'`

CUR_PATH=`pwd`\/
CUR_FILE_NAME=`echo $1`
CONV_CUR_FILE_NAME_PRE="${CUR_PATH}`echo $1`"
CONV_CUR_FILE_NAME=`echo ${CONV_CUR_FILE_NAME_PRE} | sed -e 's/\//__/g'`
BACKUP_CUR_FILE_NAME=${CONV_CUR_FILE_NAME}_${BACKUP_TIME}.backup
BACKUP_CUR_FILE_FULLPATH=~/backup/${CONV_CUR_FILE_NAME}_${BACKUP_TIME}.backup

FULL_FILE_NAME=`echo $2`
CONV_FULL_FILE_NAME=`echo $2 | sed -e 's/\//__/g'`
BACKUP_FILE_NAME=${CONV_FULL_FILE_NAME}_${BACKUP_TIME}.backup
BACKUP_FILE_FULLPATH=~/backup/${CONV_FULL_FILE_NAME}_${BACKUP_TIME}.backup

# -f フルパス指定でカレントディレクトリーにファイルがあったときに使う
FULL_FILE_NAME_2=${CUR_PATH}${FULL_FILE_NAME}
CONV_FULL_FILE_NAME_2=`echo ${FULL_FILE_NAME_2} | sed -e 's/\//__/g'`
BACKUP_FILE_NAME_2=${CONV_FULL_FILE_NAME_2}_${BACKUP_TIME}.backup
BACKUP_FILE_FULLPATH_2=~/backup/${CONV_FULL_FILE_NAME_2}_${BACKUP_TIME}.backup
# ======================================================================


# ======================================================================
# Functions
# ----------------------------------------------------------------------
function echoUsage() {
  echo 'backupTool.sh - Usage:'
  echo '1)' no option - backup file exists in current directory.
  echo './backupTools.sh BACKUP_FILE_NAME ( <- you wanna backup in current directory )'
  echo '2)' specify backup file full path.
  echo './backupTools.sh -f BACKUP_FILE_FULLPATH ( <- you wanna backup )'
}

function fullPathBackup() {
# カレントディレクトリーに指定された（フルパスでない）ファイルがあるかチェック
ls ${CUR_PATH}${FULL_FILE_NAME} > /dev/null 2>&1

if [ $? -eq 0 ]; then
  CUR_DIR=`pwd`/
  echo "Do you want to backup ${CUR_DIR}${FULL_FILE_NAME} ? [ y/n ]"
  read ANSWER

  if [ ${ANSWER} = 'y' ]; then
    mv ${FULL_FILE_NAME_2} ${BACKUP_FILE_FULLPATH_2} && cp -p ${BACKUP_FILE_FULLPATH_2} ${FULL_FILE_NAME_2}
    if [ $? -ne 0 ]; then
      echo 'backup failure.'
      exit 1
    else
      echo 'backup success. - backup file is '${BACKUP_FILE_FULLPATH_2}'.'
      echo '........................................................................'
      ls -la ${BACKUP_FILE_FULLPATH_2}
      echo '........................................................................'
      exit 0
    fi
  elif [ ${ANSWER} = 'n' ]; then
    echo 'Please specify full path you want to backup.'
  else
    echo 'Please type 'y'(means yes) or 'n'(means no) strictly.'
  fi

else
  if [ -f ${FULL_FILE_NAME} ]; then
    if [ $# -ge 3 ]; then
      echo 'Error - Too many arguments are supplied.'
      echoUsage
      exit 1
    else
      :
    fi
  else
    echo 'Error - Specified file ''"'${FULL_FILE_NAME}'"'' does not exist.'
    echoUsage
    exit 1
  fi

  mv ${FULL_FILE_NAME} ${BACKUP_FILE_FULLPATH} && cp -p ${BACKUP_FILE_FULLPATH} ${FULL_FILE_NAME}
  if [ $? -ne 0 ]; then
    echo 'backup failure.'
    exit 1
  else
    echo 'backup success. - backup file is '${BACKUP_FILE_FULLPATH}'.'
    echo '........................................................................'
    ls -la ${BACKUP_FILE_FULLPATH}
    echo '........................................................................'
    exit 0
  fi
fi
}

function currentPathBackup() {
ls ${CUR_PATH}${CUR_FILE_NAME} > /dev/null 2>&1
if [ $? -eq 0 ]; then
  if [ $# -ge 2 ]; then
    echo 'Error - Too many arguments are supplied.'
    echoUsage
    exit 1
  else
    :
  fi
else
  echo 'Error - Specified file ''"'${CUR_PATH}${CUR_FILE_NAME}'"'' does not exist.'
  echoUsage
  exit 1
fi

mv ${CUR_FILE_NAME} ${BACKUP_CUR_FILE_FULLPATH} && cp -p ${BACKUP_CUR_FILE_FULLPATH} ${CUR_FILE_NAME}
if [ $? -ne 0 ]; then
  echo 'backup failure.'
  exit 1
else
  echo 'backup success. - backup file is '${BACKUP_CUR_FILE_FULLPATH}'.'
  echo '........................................................................'
  ls -la ${BACKUP_CUR_FILE_FULLPATH}
  echo '........................................................................'
  exit 0
fi
}


# ======================================================================
# Check arguments
# ----------------------------------------------------------------------
if [ $# -eq 0 ]; then
  echoUsage
  exit 1
# $1 がファイルではなく、かつ -f ならフルバックアップ
elif [ ! -f $1 ] && [ $1 = '-f' ]; then
  file_path=full
# でないなら $1 がファイルとして存在するかチェック
elif [ -f $1 ]; then
  file_path=current
# それもないなら異常終了
else
  echo 'Error - Specified file ''"'$1'"'' does not exist.'
  echoUsage
  exit 1
fi


# ======================================================================
# Backup
# ----------------------------------------------------------------------
if [ -d ~/backup ]; then
  :
else
  mkdir ~/backup
fi

case "$file_path" in
  full ) fullPathBackup ;;
  current ) currentPathBackup ;;
esac


# ToDo
# ======================================================================
# 1)
# -f なしでフルパスを指定したときのエラーメッセージ内で / が 2 回続くのを防ぐ
# 引数の頭文字が / か否かで分岐するようにする

# 2)
# 引数の始まりが ./ のときに、バックアップファイルのファイル名がおかしくなるのを防ぐ
# bk ./php.ini 
# backup success. - backup file is /root/backup/__root__.__php.ini_20120613203111.backup.

# 3)
# man を付ける。