Log file backup

Description:

Moves all log files in a directory into new directories based on the name(s) of the original files.

Example: (output from Unix 'script command')

5:49:24 hancock6@server4 /home/hancock6# cd logs 
5:49:28 hancock6@server4 /home/hancock6/logs# ls 
20020305.tar.gz 20020324.tar.gz 20020412.tar.gz 20020501.tar.gz 200203
+06.tar.gz 20020325.tar.gz 20020413.tar.gz 20020502.tar.gz 20020307.ta
+r.gz 20020326.tar.gz 20020414.tar.gz 20020503.tar.gz 20020308.tar.gz 
+20020327.tar.gz 20020415.tar.gz 20020504.tar.gz 20020309.tar.gz 20020
+328.tar.gz 20020416.tar.gz 20020505.tar.gz 20020310.tar.gz 20020329.t
+ar.gz 20020417.tar.gz 20020506.tar.gz 20020311.tar.gz 20020330.tar.gz
+ 20020418.tar.gz 20020507.tar.gz 20020312.tar.gz 20020331.tar.gz 2002
+0419.tar.gz 20020508.tar.gz 20020313.tar.gz 20020401.tar.gz 20020420.
+tar.gz 20020509.tar.gz 20020314.tar.gz 20020402.tar.gz 20020421.tar.g
+z 20020510.tar.gz 20020315.tar.gz 20020403.tar.gz 20020422.tar.gz 200
+20511.tar.gz 20020316.tar.gz 20020404.tar.gz 20020423.tar.gz 20020512
+.tar.gz 20020317.tar.gz 20020405.tar.gz 20020424.tar.gz 20020513.tar.
+gz 20020318.tar.gz ... etc 

5:49:29 hancock6@server4 /home/hancock6/logs# mvlog.pl  

5:49:40 hancock6@server4 /home/hancock6/logs# ls -R 
.: 200203/ 200204/ 200205/ access_log error_log mvlog.pl*  

200203: 20020305.tar.gz 20020312.tar.gz 20020319.tar.gz 20020326.tar.g
+z 20020306.tar.gz 20020313.tar.gz 20020320.tar.gz 20020327.tar.gz 200
+20307.tar.gz 20020314.tar.gz 20020321.tar.gz 20020328.tar.gz 20020308
+.tar.gz 20020315.tar.gz 20020322.tar.gz 20020329.tar.gz 20020309.tar.
+gz 20020316.tar.gz 20020323.tar.gz 20020330.tar.gz 20020310.tar.gz 20
+020317.tar.gz 20020324.tar.gz 20020331.tar.gz 20020311.tar.gz 2002031
+8.tar.gz 20020325.tar.gz  

200204: 20020401.tar.gz 20020409.tar.gz 20020417.tar.gz 20020425.tar.g
+z 20020402.tar.gz 20020410.tar.gz 20020418.tar.gz 20020426.tar.gz 200
+20403.tar.gz 20020411.tar.gz 20020419.tar.gz 20020427.tar.gz 20020404
+.tar.gz 20020412.tar.gz 20020420.tar.gz 20020428.tar.gz 20020405.tar.
+gz 20020413.tar.gz 20020421.tar.gz 20020429.tar.gz ... etc
[download]

Hope this gives an idea of what it does! It's pretty much hardwired to what I needed it to do as well (as in name formats for the files/dirs to create), but maybe someone might find it of use :)

#!/usr/bin/perl
#
# move files from a log dir
# into a newly created directory
# based on the name of the logfiles
# 20020305.tar.gz

use strict;

my (@logfiles);

# file cntaining all the logfiles:
my $logdir="/home/hancock6/logs";

#open the dir ready for reading:
opendir(LOGDIR, $logdir);

#read in files from dir:
my @logdir=readdir(LOGDIR);

for my $file (@logdir){
    # foreach file in the dir, if it's a tarball,
    # copy it into @logfiles:
    if($file=~/(.*)\.tar\.gz$/){
        push(@logfiles, $file);
        print $file,"\n";
    }
}

for my $logfile (@logfiles){
    # foreach logfile in @logfiles,
    # build the dirname to copy it to:
    $logfile=~/(.*)\.tar\.gz$/;
    my $dirname=substr($1,0,-2);
    $dirname=$logdir."/".$dirname;

    print $dirname,"\n";
    # check if the dir exists, if not, create it:
    if(!-e $dirname){
        mkdir($dirname, 0755);
    }
    
    # copy the file into the dir:
    link ($logdir."/".$logfile, $dirname."/".$logfile);

    # remover the old file:
    unlink($logdir."/".$logfile);
}

Comment on Log file backup Download Code

Replies are listed 'Best First'.

•Re: Log file backup
by merlyn (Sage) on May 23, 2002 at 16:04 UTC

        $logfile=~/(.*)\.tar\.gz$/; 
        my $dirname=substr($1,0,-2);
[download]

$logfile =~ /(.*)..\.tar.gz$/ or die "Bad non-match on $logfile";
my $dirname = $1;
[download]

Also, your "link/unlink" pair can be replaced by a simple "rename". They're equivalent under the hood, with a lot less duplication.

-- Randal L. Schwartz, Perl hacker

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