101个脚本之建立linux回收站的脚本
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2022-09-01 11:19:56
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10...
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
#!/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.
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