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【Shell】混合一个文件夹下的文件

作者:Castle.liu / 发布于2014/6/9/ 1160

文件夹下每小时生成文件，需求是把昨天生成的24个文件合成一个然后压缩存储；


	#!/bin/bash
	#Author: Castle Liu
	#Date: 2014/06/04
	#Desc: merge files from a given dir,files should start with ${_BASE_NAME}
	#Usage: mergeFile -D[-d] [-c] -[-m]

	
	_YESTERDAY=`date -d yesterday +"%Y%m%d"`
	_WORK_D=""
	_DEFAULT_DIR="${_WORK_D}${_YESTERDAY}"
	_BACKUP_DIR="${_WORK_D}"`date -d yesterday +"%Y%m"`
	_BASE_NAME=""
	_FULL_NAME="${_BASE_NAME}.${_YESTERDAY}"
	_HEADER='date +"%F %T"'
	_LOG_TMP=''

	###func###
	#print
	#echo strings in a more confertable way
	print(){
	 string=$1
	 echo "`eval ${_HEADER}` ${string} "
	}

	#help
	#print help info
	help() {
	 cat <<EOF
	 -d mandetory,conflict with [-D] option,specify the dir that hold the files to be merged.
	 -D mandetory,conflict with [-d] option,use the default dir,
	 -c optional,compress the file mergeed.
	 -m optional,move the file mergeed to backup dir,and the dir given(or default dir) will be delete.
	 -h print this info.
	EOF
	}

	#error_handler
	#exit function for the script
	error_handler(){
	 error_code=$1
	 error_detail=$2
	 level=$3
	 print "error_code: ${error_code}"
	 print "error_detail: ${error_detail}"
	 if [[ ${level} -gt 3 ]];then
	 pmail "${error_detail}" "${_LOG_TMP}"
	 print "Sended excution log to Admin."
	 fi

	 if [[ ${level} -eq 2 ]];then
	 print "Serious error,excution will be abord."
	 exit ${quit_or_not}
	 fi
	}

	#targz
	#use tar -czvf to compress a file
	targz(){
	 file=$1
	 dir=`pwd`
	 cd `dirname ${file}`
	 print "Compressing file:${file}"
	 tar -czvf `basename ${file}`.tar.gz `basename ${file}` > /dev/null
	 rm -rf `basename ${file}`
	 print 'done.'
	 cd ${dir}
	}

	#merge_file
	#pass in a dirname
	merge_file(){
	 dir=$1
	 _pwd=`pwd`
	 cd ${dir}
	 print "Creating file:${_FULL_NAME}"
	 touch ${_FULL_NAME}
	 count=`ls ${_BASE_NAME}*.txt|wc -l`
	 if [[ ${count} -gt 0 ]];then
	 ls ${_BASE_NAME}*.txt|while read file
	 do
	 if [[ "${file}" != "EOF" ]];then
	 print "Hanlering file:${file}"
	 cat ${file} >> ${_FULL_NAME}
	 rm -rf ${file}
	 fi
	 done
	 print "File created."

	 if [[ ${_COMPRESS} ]];then
	 targz "${_FULL_NAME}"
	 fi

	 if [[ ${_MOVE_TO_BACKUP_DIR} ]];then
	 mv "${_FULL_NAME}.tar.gz" ${_BACKUP_DIR}
	 if [[ $? -eq 0 ]];then
	 export _DELETE_DIR=true
	 fi
	 fi
	 else
	 print "There is no required file in dir:${_DIR}"
	 error_handler "002" "no_required_file" 2
	 fi

	 cd ${_pwd}
	}

	###Main###
	#parsing args
	while getopts "d:cmD" arg
	do
	 case ${arg} in
	 d)
	 export _DIR="${OPTARG}"
	 export _USE_DIR=true
	 ;;
	 c)
	 export _COMPRESS=true
	 ;;
	 m)
	 export _MOVE_TO_BACKUP_DIR=true
	 ;;
	 D) export _USE_DEFAULT=true
	 ;;
	 h) help
	 exit 0
	 ;;
	 ?)
	 error_handler 001 "param_error" 2
	 ;;
	 esac
	done

	print "MergeFile start..."

	
	if [[ ${_USE_DIR} ]];then
	 print "Using dir:${_DIR}"
	if [[ -d ${_DIR} ]];then
	 name=`basename ${_DIR}`
	 export _FULL_NAME=${_BASE_NAME}.${name}
	 export _BACKUP_DIR=${_WORK_D}${name:0:6}
	 #Create backup dir if not exists.
	 if [[ ! -d ${_BACKUP_DIR} ]];then
	 mkdir -p ${_BACKUP_DIR}
	 fi
	 merge_file ${_DIR}
	 if [[ ${_DELETE_DIR} ]];then
	 print "Deleting dir:${_DIR}"
	 rm -rf ${_DIR}
	 fi

	 else
	 print "DIR not exists,pls check."
	 error_handler "003" "dir_not_exists." 2
	 fi
	elif [[ ${_USE_DEFAULT} ]];then
	 print "USing Default dir:${_DEFAULT_DIR}"

	 #Create backup dir if not exists.
	 if [[ ! -d ${_BACKUP_DIR} ]];then
	 mkdir -p ${_BACKUP_DIR}
	 fi
	 if [[ -d ${_DEFAULT_DIR} ]];then
	 merge_file ${_DEFAULT_DIR}
	 if [[ ${_DELETE_DIR} ]];then
	 print "Deleting dir:${_DEFAULT_DIR}"
	 rm -rf ${_DEFAULT_DIR}
	 fi
	 else
	 print "Default dir not exists,pls check."
	 error_handler "004" "default_dir_not_exists" 3
	 fi
	else
	 error_handler 005 "param_error" 2
	fi

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