On Tue, Dec 22, 2009 at 3:09 AM, Dale <[email protected]> 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
--
"If you have an apple and I have an apple and we exchange apples then
you and I will still each have one apple. But if you have an idea and
I have one idea and we exchange these ideas, then each of us will have
two ideas." - George Bernard Shaw
