Daily Backup using Perl

Posted on 2009-07-10
Last Modified: 2012-06-21
I need to make a Perl backup script that creates a new dated folder every day, copies data from a source folder to the new dated folder until it reaches 28 days, then deletes the oldest folder and continues. This will have to function in Server 2k3. Below is what I have so far - I started getting confused when generating and naming the folders failed. Any Perl Genius want to help out?
#! C:\Perl\bin
use Date::Calc qw(Day_of_Week Week_Number Day_of_Week_to_Text);
use Time::localtime;
$tm = localtime;
($day, $month, $year) = ($tm->mday, $tm->mon, $tm->year);
# Set date/time/day of week
$year = $year+1900;
$month = $month+1;
$wday = Day_of_Week($year, $month, $day);
$wnum = Week_Number($year, $month, $day);
print "date set\n";
# Create new folders by date
use POSIX qw[strftime];
if(-e $DestDirFinal) {
      system("rm -fr $DestDirFinal");
mkdir($DestDirFinal) or die "Could not mkdir: $!\n";
system("cp -R $SourceDir $DestDirFinal");

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Question by:ICT-KevinM
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LVL 39

Expert Comment

ID: 24825130
Instead of using system, you should use perl commands, as it'll be easier to tell if it was successful.

Instead of "rm -fr" (a unix command - I thought you need win2k3?) to remove directories, you should use the rmtree from the File::Path module.

Instead of "cp -R" (again unix command?) to copy, use File::Copy::Recursive.

using these modules will also make your script more portable, in case it is needed on both unix and windows systems.

Author Comment

ID: 24825172
Thanks Adam - I guess I having been reading so much information on Perl, I have begun to blur the lines between perl and unix commands. Is it possible for me to name folders based on local date using a Perl command? I have searched high and low.
LVL 39

Accepted Solution

Adam314 earned 250 total points
ID: 24828178
Yes, you can use the $DestDirFinal like you have, which uses the strftime function to generate the folder name from the date.  Is this not what you wanted?

LVL 48

Assisted Solution

Tintin earned 250 total points
ID: 24828233
You are best not to mix backslashes and forward slashes.  Much easier to stick with forward slashes so you don't need to make differences between Windows and Unix/Linux systems.





Author Closing Comment

ID: 31602113
Thanks, that's great.

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