快速业务通道

101个脚本之linux回收站

作者 佚名技术 来源 Linux系统 浏览 发布时间 2012-03-24

众所周知,linux是没有回收站的,一些人很害怕删错东西(有经验的linux管理员极少范这错误),个人不建议回收站,而应该是培养个人的安全意识.有点小跑题.
接着回来101个脚本之#15 Archiving Files As They''re Removed 就是建立一个linux回收站的脚本
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
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.

本文出自 “你就当我是浮夸吧” 博客,请务必保留此出处http://2804976.blog.51cto.com/2794976/737125

凌众科技专业提供服务器租用、服务器托管、企业邮局、虚拟主机等服务,公司网站:http://www.lingzhong.cn 为了给广大客户了解更多的技术信息,本技术文章收集来源于网络,凌众科技尊重文章作者的版权,如果有涉及你的版权有必要删除你的文章,请和我们联系。以上信息与文章正文是不可分割的一部分,如果您要转载本文章,请保留以上信息,谢谢!

分享到: 更多

Copyright ©1999-2011 厦门凌众科技有限公司 厦门优通互联科技开发有限公司 All rights reserved

地址(ADD):厦门软件园二期望海路63号701E(东南融通旁) 邮编(ZIP):361008

电话:0592-5908028 传真:0592-5908039 咨询信箱:web@lingzhong.cn 咨询OICQ:173723134

《中华人民共和国增值电信业务经营许可证》闽B2-20100024  ICP备案:闽ICP备05037997号