shell sh如何每天備份log檔案

#!/bin/bash# 每天備份log檔案log_path="/home/fdipzone/logs"         # log目錄backup_path="/home/fdipzone/logs/bak"  # 備份目錄expire=30                              # 備份檔案只保留30天function backup(){    if [ -d "$log_path" ] && [ -d "$backup_path" ]; then        for file in $(find $log_path -maxdepth 1 -name "*.log" -type f); do            copy $file        done    else        echo "${log_path} or ${backup_path} not exists"    fi}function copy(){    ofile=$1    dpath="${backup_path}/$(date -d yesterday +%Y/%m/%d/)"    dfile="${dpath}${ofile##*/}"    if [ -f "$ofile" ] && [ -s "$ofile" ]; then                if [ ! -d "$dpath" ]; then # create folder            mkdir -p "$dpath"        fi        cp "$ofile" "$dfile" # copy file        cat /dev/null > "$ofile" # create empty file        echo "${ofile} copy to ${dfile} success"    fi}function clearexpire(){    if [ -d "$backup_path" ]; then        echo ${expire:=30} > /dev/null        $(find $backup_path -name "*.log" -type f -mtime +$expire -exec rm {} \;) # delete expire file        $(find $backup_path -mindepth 1 -depth -empty -type d -exec rm -r {} \;) # delete empty folder    else        echo "${backup_path} not exists"    fi}backupclearexpireexit 0

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