删除文件跟恢复文件系列。

pupilzeng · 发表于 2003-5-17 22:15:58

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:

#!/bin/bash
#move the file(s) to the /trash/~ instead of deleting.
#Author: pupilzeng
#E-mail: [email]shixinzeng@sjtu.edu.cn[/email]
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 $i"
#but now i won't exit,because there may be other files to be deleted!
else
#now write the record file
if [ "`dirname "$i"`" = "." ] #relative path
then
echo -e "$PWD/`basename "$i"`\t\t$DATE ">>$RECORD
else
echo -e ""$i" \t\t$DATE">>$RECORD
fi
fi
else
echo "You have not enough permission to delete $i!"
fi
done
exit 0

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recover:

#!/bin/bash
#recover
#Author: pupilzeng
#E-mail: [email]shixinzeng@sjtu.edu.cn[/email]
#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

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erase:

#!/bin/bash
#erase
#Author: pupilzeng
#E-mail: [email]shixinzeng@sjtu.edu.cn[/email]
#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

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感谢javalee,你帮忙解决了文件名中有空格的问题
欢迎大家帮忙测试
有问题，大家一块讨论，我也对这个不熟。

KornLee · 发表于 2003-5-17 23:43:23

真棒!~ 加入[脚本欣赏],值得收藏!;)

LYOO · 发表于 2003-5-18 17:06:45

呵呵，几天没来，想法成真了，等过几天闲下来，我就测试一下;)

seablue · 发表于 2003-5-18 22:51:12

如果我这样的话,会不会有问题?
我在/mnt/cdrom

del ~user/filename

KornLee · 发表于 2003-5-18 23:11:49

当然,你是无法删除cdrom中的文件的,因为,他是只读的.

pupilzeng · 发表于 2003-5-18 23:24:41

最初由 gzqhz 发表
如果我这样的话,会不会有问题?
我在/mnt/cdrom

del ~user/filename

是不能删，但不能说是一个问题，它会给出提示：You have not enough permission to delete $i!
因为这个脚本在del的时候检查了你对这个文件的操作权限，如果你不能写这个文件的话，你也就没有权限把它删除，我想这一点应该是合理的。

seablue · 发表于 2003-5-19 12:39:55

如果我删除的文件使用的是相对路径, 恢复会不会有问题?
如:
当前目录是/usr
删除:
del ../home/me/filename

这样的话能够正确恢复filename吗?

pupilzeng · 发表于 2003-5-19 20:25:32

最初由 gzqhz 发表
如果我删除的文件使用的是相对路径, 恢复会不会有问题?
如:
当前目录是/usr
删除:
del ../home/me/filename

这样的话能够正确恢复filename吗?

哦，这个会有问题，当时忽略了这一点，只是考虑了，当前目录下的这种相对路径跟绝对路径了。
让我改改。
谢谢你提出这个问题。

pupilzeng · 发表于 2003-5-19 20:59:08

#!/bin/bash
#move the file(s) to the /trash/~ instead of deleting.
#Author: pupilzeng
#E-mail: [email]shixinzeng@sjtu.edu.cn[/email]
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 $i"
#but now i won't exit,because there may be other files to be deleted!
else
#now write the record file
[color=RED]#the lines below were modified![/color]
CURRENTDIR=$PWD [color=blue]#*[/color]
cd `basename "$i"`
echo -e "$PWD/`basename "$i"`\t\t$DATE ">>$RECORD
cd $CURRENTDIR [color=blue]#* return to original working directory[/color]
[color=blue]#The lines marked * can be omitted! For safety,they remain there.[/color]
[color=RED]#---------------------------------------------------------------
[/color]
fi
else
echo "You have not enough permission to delete $i!"
fi
done
exit 0

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把del文件改成这样