Re: [gentoo-user] Writing a bash script or thinking about it anyway.

[Dale <rdalek1967@gmail.com>]

Francisco Ares wrote:
> On Tue, Dec 22, 2009 at 3:09 AM, Dale <rdalek1967@gmail.com> wrote:
>   
>> Neil Walker wrote:
>>     
>>> Dale wrote:
>>>
>>>       
>>>> Me again.  I'm thinking about writing a bash script that backs up my
>>>> /home directory.
>>>>
>>>>         
>>> I use a simple rsync cron job to backup entire servers every hour. Does
>>> the job for me. ;)
>>>
>>>
>>> Be lucky,
>>>
>>> Neil
>>> http://www.the-workathome.com
>>>
>>>
>>>       
>> But I wouldn't learn how to write a script that way.  I got to start
>> somewhere.  This is a good place.
>>
>> Dale
>>
>> :-)  :-)
>>
>>     
>
> Now I got your point.
>
> I would think on something like this (untested):
>
>
> The command line would be
>
> BackupScriptName  FromDirectory  ToDirectory
>
>
> #! /bin/bash
> FROM=$1
> TO=$2
> cd $FROM
> for i in * .??*
> do
>     if [[ -d "$i" ]]   # is it a directory?
>     then
>         # yes, it is a directory
>         if [[ -e "$TO/$i" ]] && [[ -d "$TO/$i" ]]
>         then
>
>         # on the TO side, the name exists
>         # and it is a directory
>             cd "$i"
>
>             # just to show something
>             pwd
>
>             # calls recursively this same script
>             $0 "$FROM/$i" "$TO/$i"
>             cd ..
>
>         else
>             # didn't existed yet on the TO side,
>             # so copy everything
>             cp -a $FROM/$i $TO/$i
>         fi
>     else
>         # it is a file, not a directory
>         if [[ -e "$TO/$i" ]]
>         then
>             # the file already exists
>
>             # do something to compare the files, like:
>
>             # gets size from "ls" result
>             SIZE1=`ls -l "$i" | cut -d" " -f5`
>             SIZE2=`ls -l "TO/$i" | cut -d" " -f5
>
>             if (( $SIZE1!=$SIZE2 ))
>             then
>
>                 # size is different, so copy the file
>                 cp -a "$FROM/$i" "$TO/$i"
>
>             else
>                 # more tests for differences other
>                 # than size, like date/time
>                 # or even MD5SUM
>             fi
>         else
>
>             # file doesn't exist at the "TO" side
>             cp -a "$FROM/$i" "$TO/$i"
>
>         fi
>
>     fi
>
> done
>
>
> Hope this helps
> Francisco
>   

After learning a little about scripting I'll give this a once over and 
see what I learn.  Right now, it's like. . . huh.  lol

Thanks.

Dale

:-)  :-)