[TriLUG] Some script help

[William Sutton via TriLUG]

in looking at your filename format, awk isn't actually necessary.  Check 
this out:

$ echo 'backup_2014-06-13_7-00-07_14.1R1.tgz' |cut -d'_' -f2 |sed "s/-//g"
20140613

William Sutton

On Fri, 8 May 2015, William Sutton via TriLUG wrote:

> Someone once said that if you have a problem and you decide to use regex, 
> you now have two problems (and I say that as a Perl guy with lots of regex 
> experience).
>
> Might I suggest another approach:  chop the filename up with awk and 
> arrange it according to YYYYMMDD, which will sort numerically.  Pull 
> today's date in the same format, and your numeric comparison will work 
> fine.
>
> William Sutton
>
> On Fri, 8 May 2015, Brian Blater via TriLUG wrote:
>
>> I'm trying to get a basic bash script put together to copy some backup
>> files from one location to another. I've got the basics done, I think, but
>> one section could use some regex or similar and my regex abilities are bad.
>>
>> Here is the script:
>>
>> #!/bin/bash
>>
>> ## Establish DATE ##
>> NOW=$(date +"%F")
>> DELDATE=$(date --date="7 days ago" +"%F")
>>
>> ## Remote Server ##
>> ## RSERVER="servername"
>> RPATH="/path/to/remote/dir/"
>>
>> ## Local Path ##
>> LPATH="/path/to/local/dir/"
>>
>> ## Copy files ##
>> for i in $( ls $RPATH ); do
>> ## some regex or ? to get only the date from file        ##
>> ## assign that to $FILE                                  ##
>> ## file looks like: backup_2014-06-13_7-00-07_14.1R1.tgz ##
>> ## only want to compare the 2014-06-13 of file with $NOW ##
>>
>> ## if it is today's file copy it ##
>> if [ "$FILE" = "$NOW" ]; then
>> cp $i $LPATH
>> else
>> ## if it is older than 7 days mv it ##
>> if [ "$FILE" < "$DELDATE" ]; then
>> mv $i $LPATH
>> fi
>> fi
>> done
>>
>> For now, my issue is in the Copy Files section. As the note says I need to
>> look at each file and compare just the date portion. If it matches $NOW I
>> want to copy it.
>>
>> The other concern is the next IF in that section. I basically want to leave
>> a weeks worth of files in that directory before copying them to remote
>> storage. Can I just do a < there, or do I need some more magic to do that
>> comparison?
>>
>> Thank you for your help.
>> Brian
>> -- 
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> -- 
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