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 = $kernel->sort(@kernel_list);
print join( ', ', @sorted_list );
DESCRIPTION¶
Linux::KernelSort is intended to sort a list of kernel versions into ascending
order. It also provides the capability to compare two kernel versions and
determine if one version is newer, older, or the same as the other version.
FUNCTIONS¶
rank()¶
Purpose: Generate a ranking for a given kernel version
Input: A string containing the kernel version which
follows the proper naming convention demonstrated
by http://www.kernel.org
Return: Kernel ranking
compare()¶
Purpose: Compare two kernel versions
Input: Strings ($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.
