Linux Certif

Toute la documentation sur la certification Linux LPI

Linux::KernelSort.3pm

NAME

Linux::KernelSort - Perl extension for sorting and comparing Linux kernel versions. The expected kernel version naming convention is the same naming convetion demonstrated by http://www.kernel.org. NOTE: Currently, only the 2.6.x series of kernels (including -rc's, -git's, and -mm's) are properly evaluated.

SYNOPSIS

   use Linux::KernelSort;
   my $kernel = new Linux::KernelSort;
 
   my $ret;
   my $version1 = "2.6.19";
   my $version2 = "2.6.19-rc2-git7";
   $ret = $kernel->compare($version1, $version2);
 
   if ($ret == 0) {
     print "$version1 and $version2 are the same version\n";
   } elsif ($ret > 0) {
     print "$version1 is newer than $version2\n";
   } else {
     print "$version1 is older than $version2\n";
   }
 
   my @kernel_list = ( '2.6.15',
                       '2.6.18',
                       '2.6.18-rc2',
                       '2.6.18-rc2-git2',
                       '2.6.18-mm1',
                       '2.6.18-rc2-mm1' );
 
   my @sorted_list = $kernel->sort(@kernel_list);
 
   print join( ', ', @sorted_list );
 
 

DESCRIPTION

Linux::KernelSort is intended to sort a list of kernel versions into ascending order. It also provides the capability to compare two kernel versions and determine if one version is newer, older, or the same as the other version.

FUNCTIONS

version_check() Purpose: Verify the version is valid and follows the proper naming convention demonstrated by http://www.kernel.org Input: A string containing the kernel version Return: 0 if version is valid 1 if version is invalid

rank()

     Purpose:  Generate a ranking for a given kernel version
     Input:    A string containing the kernel version which
               follows the proper naming convention demonstrated
               by http://www.kernel.org
     Return:   Kernel ranking
 
 

compare()

     Purpose:  Compare two kernel versions
     Input:    Strings ($kernel1, $kernel2) each containing a
               kernel version which follows the proper naming
               conventaion demonstrated by http://www.kernel.org
     Return   -1 if $kernel1 < $kernel2  (ie $kernel1 is older than $kernel2)
               0 if $kernel1 == $kernel2 (ie $kernel1 is the same version as $kernel2)
               1 if $kernel1 > $kernel2  (ie $kernel1 is newer than $kernel2)
 
 

sort()

     Purpose:  Sort a list of kernel versions in ascending order.
               Uses shell sort algorithm.
     Input:    Array of strings containing kernel versions which
               follows the proper naming convention demonstrated
               by http://www.kernel.org
     Return:   Sorted array
 
 

AUTHOR

Leann Ogasawara <lt>ogasawara@osdl.org<gt>

COPYRIGHT AND LICENSE

Linux-KernelSort is Copyright (c) 2006, by Leann Ogasawara. All rights reserved. You may distribute this code under the terms of either the GNU General Public License or the Artistic License, as specified in the Perl README file.