删除文件与恢复文件

时间：2008-05-02 来源：剑心通明

作者 pupilzeng
这一共有三个脚本，他们是一套的
1)del:删除文件，其实是把它移动到/trash/$user/下，不同的用户有不同的存放目录，同时用该目录下的.record文

件记录文件原来的路径，删除时间，以备恢复只用。
2)recover:恢复文件，通过.record文件找到足够的信息，从而把它恢复
3)erase:这个是彻底的删除文件，从/trash/$user/目录下，相当于windows下的清空回收站。
为了安全，这个脚本是要在/trash/$user/目录下运行。
以下是这三个脚本
del代码:
#!/bin/bash
#move the file(s) to the /trash/~ instead of deleting.
#Author: pupilzeng
#E-mail:[email protected]
USER=`whoami`
TRASH=/trash/$USER
RECORD=/trash/$USER/.record #record file
ORIG=`pwd`
DATE=`date +%T---%Y/%m/%d`

Usage ()
{
      echo "Usage: `basename $0` file(s)"
}

if [ "$1" = "-h" -o "$1" = "--help" ];then
      Usage
      exit 0
fi
if [ $# -le 0 ];then
      Usage
      exit 1
fi

if [ ! -d $TRASH ];then
      mkdir -p $TRASH
fi

for i in "$@"
      do
      if [ -w "$i" ];then
            mv "$i" $TRASH
            if [ $? -ne 0 ];then
            echo "Something wrong occurred while delete file $i"
            #but now i won't exit,because there may be other files to be deleted!
            else
            #now write the record file
            #the lines below were modified!
            CURRENTDIR=$PWD #*
            cd `basename "$i"`
            echo -e "$PWD/`basename "$i"`\t\t$DATE ">>$RECORD
            cd $CURRENTDIR #* return to original working directory
               #The lines marked * can be omitted! For safety,they remain there.
            #---------------------------------------------------------------

            fi
            else
                     echo "You have not enough permission to delete $i!"
      fi
      done
exit 0

recover代码:
#!/bin/bash
#recover
#Author: pupilzeng
#E-mail:[email protected]
#To recover the removed file(s) by script myrm
USER=`whoami`
TRASH=/trash/$USER
RECORD=$TRASH/.record
TEMP=$TRASH/.temp
Usage ()
{
      echo "Usage:`basename $0` file(s)"
}
if [ "$1" = "-h" -o "$1" = "--help" ];then
      Usage
      exit 0
fi

for i in "$@"
do
      DEST=`grep "$i" $RECORD |awk '{ print $1}'`
      mv -f "$i" $DEST

      if [ $? -ne 0 ];then
            echo "Something occurred!"
            exit 1
      else
            echo "Recovered $DEST"
      #remove record from $RECORD
      grep -v "$i" $RECORD >$TEMP
      mv -f $TEMP $RECORD
      fi
done
exit 0

erase代码:
#!/bin/bash
#erase
#Author: pupilzeng
#E-mail:[email protected]
#erase the files in trash that you are sure they needn't at all.
#for assurance,you should do it in /trash/user directory.
Usage ()
{
cat <<END
Usage:`basename $0` [Option] file(s)
Options:
  -f  :don't prompt before erase files
END
}

USER=`whoami`
TRASH=/trash/$USER
RECORD=$TRASH/.record
FORCE=no
TEMP=$TRASH/.temp

if [ $# -lt 1 ]
then
      echo "Wrong parameters"
      Usage
      exit 1
fi

if [ $PWD != $TRASH ]
then
      echo "you should do it in $TRASH directory!"
      exit 1
fi

if [ "$1" = "-h" -o "$1" = "--help" ]
then
      Usage
      exit 0
fi

if [ "$1" = "-f" ];then
      FORCE=yes
      shift
fi

for i in "$@"
do
      ANS=no
      if [ $FORCE = "yes" ];then
            rm -fr "$i"
      else
            echo -n "Do you really wanna erase "$i"? Yes|[No]:"
            read ANS
            case $ANS in
            "Y"|"y"|"Yes"|"yes")
                     rm -fr "$i"
                     ;;
            *)
                     continue
                     ;;
            esac

      fi
      if [ $? -eq 0 ];then
      #now remove the records
      grep -v "$i" $RECORD >$TEMP
      mv -f $TEMP $RECORD
      fi
done
exit 0