linux回收站脚本,Linux服务器实现回收站功能脚本讲解

Linux

众所周知，linux是没有回收站的，一旦误删，容易导致文件丢失，那么这时一个回收站可以避免类似操作失误。这里主要使用Archiving Files As They’re Removed脚本，可以建立Linux回收站。

#!/bin/sh

# newrm, a replacement for the existing rm command, provides a

# rudimentary unremove capability by creating and utilizing a new

# directory within the user's home directory. It can handle directories

# of content as well as individual files, and if the user specifies

# the -f flag files are removed and NOT archived.

# Big Important Warning: You'll want a cron job or something similar to keep

# the trash directories tamed. Otherwise nothing will ever actually

# be deleted from the system and you'll run out of disk space!

mydir="$HOME/.deleted-files"

realrm="/bin/rm"

copy="/bin/cp -R"

if [ $# -eq 0 ] ; then # let 'rm' ouptut the usage error

exec $realrm # our shell is replaced by /bin/rm

fi

# Parse all options looking for '-f'

flags=""

while getopts "dfiPRrvW" opt

do

case $opt in

f) exec $realrm "$@" ;; # exec lets us exit this script directly.

*) flags="$flags -$opt" ;; # other flags are for 'rm', not us

esac

done

shift $(($OPTIND - 1))

# Make sure that the $mydir exists

if [ ! -d $mydir ] ; then

if [ ! -w $HOME ] ; then

echo "$0 failed: can't create $mydir in $HOME" >&2

exit 1

fi

mkdir $mydir

chmod 700 $mydir # a little bit of privacy, please

fi

for arg

do

newname="$mydir/$(date "+%S.%M.%H.%d.%m").$(basename "$arg")"

if [ -f "$arg" ] ; then

$copy "$arg" "$newname"

elif [ -d "$arg" ] ; then

$copy "$arg" "$newname"

fi

done

exec $realrm $flags "$@" # our shell is replaced by realrm

我们来说下这个脚本的实现思路

将原本的rm命令用我们这个带有回收站机制的myrm脚本代替(alias别名)，脚本将要删除的文件移动到了home下个人目录中以.deleted-files 命名的隐藏文件夹。

接着我们看看这个脚本是怎么实现的

while getopts "dfiPRrvW" opt

do

case $opt in

f) exec $realrm "$@" ;; # exec lets us exit this script directly.

*) flags="$flags -$opt" ;; # other flags are for 'rm', not us

esac

done

这一段说明 要是命令用带 –f 选项的话，则不进回收站，调用原本的rm命令。

for arg

do

newname="$mydir/$(date "+%S.%M.%H.%d.%m").$(basename "$arg")"

if [ -f "$arg" ] ; then

$copy "$arg" "$newname"

elif [ -d "$arg" ] ; then

$copy "$arg" "$newname"

fi

done

用for循环顺序处理参数

newname=”$mydir/$(date “+%S.%M.%H.%d.%m”).$(basename “$arg”)” 回收站里文件命名.