Hello,
today while I was in #linux-cluster I found that the configure script doesn't
check for the kernel version.
I wrote a little function which checks the kernel version and returns 0 or 1.
Here is the code:
sub kernel_version {
my $makefile = shift;
my $build_version_min = shift;
my $build_patchlevel_min = shift;
my $build_sublevel_min = shift;
my $build_version_max = shift;
my $build_patchlevel_max = shift;
my $build_sublevel_max = shift;
# add the Makefile to the path
$makefile .= 'Makefile';
my $version=0;
my $patchlevel=0;
my $sublevel=0;
if ( -f $makefile ) {
# open the Makefile to feth VERSION, PATCHLEVEL and SUBLEVEL, if needed I
can add EXTRAVERSION too
open MAKEFILE, '<', $makefile;
while (<MAKEFILE>) {
if ($_ =~ /^VERSION/) {
$version = $_;
}
if ($_ =~ /^PATCHLEVEL/) {
$patchlevel = $_;
}
if ($_ =~ /^SUBLEVEL/) {
$sublevel = $_;
# we don't need to check any thing else in this file so we are
stopping the read
last;
}
}
close MAKEFILE;
# leaving only the numbers from the lines
# this is faster then split and doesn't alocate useless arrays
$version =~ s/.*\s([0-9]+)[\n|\r]/$1/;
$patchlevel =~ s/.*\s([0-9]+)[\n|\r]/$1/;
$sublevel =~ s/.*\s([0-9]+)[\n|\r]/$1/;
# checking VERSION, PATCHLEVEL and SUBLEVEL for a kernel
# if needed I can add also EXTRAVERSION to the check
if ($version >= $build_version_min &&
$version <= $build_version_max &&
$patchlevel >= $build_patchlevel_min &&
$patchlevel <= $build_patchlevel_max &&
$sublevel >= $build_sublevel_min &&
$sublevel <= $build_sublevel_max) {
print 'Current kernel version is OK',"\n";
return 1;
} else {
print 'Current kernel version: ',$version.'.'.$patchlevel.'.'.
$sublevel,"\nMinimum version: ".$build_version_min.'.'.
$build_patchlevel_min.'.'.$build_sublevel_min,"\nMaximum version: ".
$build_version_max.'.'.$build_patchlevel_max.'.'.$build_sublevel_max,"\n";
return 0;
}
} else {
print "Unable to find kernel Makefile!\n";
return 0;
}
}
# the options to this function are:
# source path
# minimum kernel version
# minimum kernel patchlevel
# minimum kernel sublevel
# maximum kernel version
# maximum kernel patchlevel
# maximum kernel sublevel
kernel_version('/usr/src/linux/',2,6,24,2,6,25);
The function can be used to check the makefile from $kernel_build or
$kernel_src.
I hope that this will be useful to you guys.
Best regards
Marian Marinov
