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.