101個腳本之linux資源回收筒

衆所周知，linux是沒有資源回收筒的，一些人很害怕删錯東西（有經驗的linux管理者極少範這錯誤），個人不建議資源回收筒，而應該是培養個人的安全意識。有點小跑題。

接着回來101個腳本之#15 Archiving Files As They're Removed 就是建立一個linux資源回收筒的腳本

The Code

#!/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

mkdir $mydir

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

for arg

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

if [ -f "$arg" ] ; then

$copy "$arg" "$newname"

elif [ -d "$arg" ] ; then

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

我們來說下這個腳本的實作思路

将原本的rm指令用我們這個帶有資源回收筒機制的myrm腳本代替（alias别名），腳本将要删除的檔案移動到了home下個人目錄中以.deleted-files 命名的隐藏檔案夾。

接着我們看看這個腳本是怎麼實作的

這一段說明 要是指令用帶 –f 選項的話，則不進資源回收筒，調用原本的rm指令。

用for循環順序處理參數

newname="$mydir/$(date "+%S.%M.%H.%d.%m").$(basename "$arg")" 資源回收筒裡檔案命名.

本文轉自 hb_fukua 51CTO部落格，原文連結:http://blog.51cto.com/2804976/737125