centos下实现回收站功能

1、在用户执行rm命令时，将文件移动/dump-file/ ，被移动到dump-file 目录下的文件、文件夹以原文件名+删除除的日期格式存放，如 rm.sh 在删除后就会被自动移动到/dump-file/ 下并命名为rm.sh_2011-05-17_11:18:21.bak
2、此命令在执行时会检测文件或目录的大小，如果文件或目录超过2GB，将不会再将文件移动到回收站，而会直接删除，此功能是为了避免回收站过大而对系统造成影响

第一步：
cp -rp /bin/rm /bin/rm.bak
//将系统原有rm 命令改成rm.bak，记住 一定要改成rm.bak,因为回收站脚本需要调用 rm.bak这个命令。
cp -rp rm.sh /bin/rm
//将你的脚本文件rm.sh 覆盖成/bin/rm文件
chmod +x /bin/rm
//赋予/bin/rm可执行权限
echo “0 8? * * 6?? /bin/sh? /fmnp/soft/clean-dump.sh ” >>/var/spool/cron/tabs/root
//为了防止 /dump-file目录过大，采取每周进行一次删除操作，脚本如下：
#!/bin/bash
/bin/rm.bak -rf /dump-file/*
/bin/rm.bak -rf /tmp/*.rm-dump

rm.sh文件如下

 ?? #!/bin/bash
DumpFile=/dump-file/
File=`echo $line|awk '{print $2}'`
aa=$(echo $1|grep "^-")
DumpLog="`whoami`-`date +%m-%d-%H-%M`.rm-dump"

function TestDir()
{
Test_Dir=$(echo $line|grep "/") #test if is a directory.
Test_Dir2=$(echo $line |awk '{print $2}'|grep "^/") # Test if the prameter starts with "/".
Test_Dir3=$(echo $line |awk '{print $2}'|grep "^/tmp") #
Dir2=$(echo $line |awk -F/ '{print $2}') #Extract the prameter after the first "/".
Dir=$(echo $line |awk '{print $2}'|awk -F/ '{print $1}') ##Extract the prameter before the first "/".
D1=`date +%F_%H:%M:%S.bak`
Date=`echo $line | awk '{print $2 "_" D1}' D1=$D1`
DumpLog="`whoami`-`date +%m-%d-%H-%M`.rm-dump"

if [[ $Test_Dir != "" ]] ;then #If parameters include directory
if [[ $Test_Dir2 != "" ]] ;then #If parameter starts with "/",as formate /a/b/c/
if [[ $Test_Dir3 != "" ]];then # this test is for to repaire less command's error.
rm.bak -rf `echo $line|awk '{print $2}'`
else
#echo $line "start with /"
mkdir $DumpFile$Dir2"_"$D1 2>/tmp/$DumpLog # Create directory as format /dump-file/(first directory after "/")

mv `echo $line|awk '{print $2}'` $DumpFile$Dir2"_"$D1
echo $DumpFile$Dir2"_"$D1
fi
else #Means that parameter starts without "/" ,as format a/b/c
mkdir $DumpFile$Dir$D1 #Create directory as format /dump-file/(first directory before "/")
mv `echo $line|awk '{print $2}'` $DumpFile$Dir$D1
echo $line "starts before /"
fi
else
Date=`echo $line | awk '{print $2 "_" D1}' D1=$D1`
mv `echo $line|awk '{print $2}'` $DumpFile$Date
fi
}


if [[ "$1" != "" ]] ;then #If the frist parameter is not empty.
if [[ $aa != "$1" ]];then #If the first parameter not start with "-".
du -s "$@" 2>/tmp/$DumpLog |while read line
do
size=`echo $line | awk '$1 >2000000{print $1}'`
if [ "$size" > "1900000" ];then
#echo "Lager than 2Mb"
rm.bak -rf `echo $line|awk '{print $2}'`
else
TestDir
fi
done
else
if [[ "$2" != ""? ]]; then
until [ "$2" == ""? ]
do
#echo "function is running"
du -s $2 2> /tmp/$DumpLog |while read line
do
size=`echo $line | awk '$1 >2000000{print $1}'`
if [ "$size" > "1900000" ];then
#echo "Lager than 2Mb"
rm.bak -rf $2
else
TestDir

fi
shift
done
shift
done
else
echo -e "No file detected./nTry 'rm --help' for more information. "
fi
fi
else
echo -e "rm: missing operand /nTry 'rm --help' for more information."
fi 

第二部：
mkdir /dump-file && chmod -R 777 /dump-file
//创建/dump-file 目录并给予所有用户可写的权限。

上文为网络整理。并进过实验，确实可行

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