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# needrestart - Restart daemons after library updates.
#
# Authors:
# Thomas Liske <thomas@fiasko-nw.net>
#
# Copyright Holder:
# 2013 - 2020 (C) Thomas Liske [http://fiasko-nw.net/~thomas/]
#
# License:
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this package; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
package NeedRestart::Kernel;
use strict;
use warnings;
use NeedRestart::Utils;
use Module::Find;
use POSIX qw(uname);
use constant {
NRK_UNKNOWN => 0,
NRK_NOUPGRADE => 1,
NRK_ABIUPGRADE => 2,
NRK_VERUPGRADE => 3,
};
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(
nr_kernel_check
nr_kernel_vcmp
nr_kernel_vcmp_rpm
NRK_UNKNOWN
NRK_NOUPGRADE
NRK_ABIUPGRADE
NRK_VERUPGRADE
);
my $LOGPREF = '[Kernel]';
sub nr_kernel_check {
my $debug = shift;
my $filter = shift;
my $ui = shift;
my %vars;
my ($sysname, $nodename, $release, $version, $machine) = uname;
$vars{KVERSION} = $release;
print STDERR "$LOGPREF $sysname: kernel release $release, kernel version $version\n" if($debug);
# autoload Kernel modules
foreach my $module (findsubmod NeedRestart::Kernel) {
my @ret;
unless(eval "use $module; \@ret = ${module}::nr_kernel_check_real(\$debug, \$filter, \$ui);") {
warn "Failed to load $module: $@" if($@ && $debug);
}
else {
return @ret;
}
}
return (NRK_UNKNOWN, %vars);
}
## The following version number comparing stuff was taken from Dpkg::Version.
## The code has been adopted to be usable in needrestart w/o any additional
## dependencies.
sub _nr_kversion_order {
my ($x) = @_;
if ($x eq '~') {
return -1;
} elsif ($x =~ /^\d$/) {
return $x * 1 + 1;
} elsif ($x =~ /^[A-Za-z]$/) {
return ord($x);
} else {
return ord($x) + 256;
}
}
sub _nr_kversion_strcmp($$) {
my @a = map { _nr_kversion_order($_); } split(//, shift);
my @b = map { _nr_kversion_order($_); } split(//, shift);
while (1) {
my ($a, $b) = (shift @a, shift @b);
return 0 unless(defined($a) || defined($b));
$a ||= 0; # Default order for "no character"
$b ||= 0;
return 1 if($a > $b);
return -1 if($a < $b);
}
}
# compare kernel version strings according to Debian's dpkg version scheme
sub nr_kernel_vcmp($$) {
# sort well known devel tags just as grub does
my @v = map {
my $v = $_;
$v =~ s/[._-](pre|rc|test|git|old|trunk)/~$1/g;
$v;
} @_;
my @a = split(/(?<=\d)(?=\D)|(?<=\D)(?=\d)/, shift(@v));
my @b = split(/(?<=\d)(?=\D)|(?<=\D)(?=\d)/, shift(@v));
while(1) {
my ($a, $b) = (shift @a, shift @b);
return 0 unless(defined($a) || defined($b));
$a ||= 0;
$b ||= 0;
if($a =~ /^\d+$/ && $b =~ /^\d+$/) {
my $cmp = $a <=> $b;
return $cmp if($cmp);
}
else {
my $cmp = _nr_kversion_strcmp($a, $b);
return $cmp if($cmp);
}
}
}
# compare kernel version strings according to RPM version sorting
# adopted from RPM::VersionSort
sub nr_kernel_vcmp_rpm {
# split version strings by non-alphanumeric digits
my @a = split(/[^a-z\d]+/i, shift);
my @b = split(/[^a-z\d]+/i, shift);
while(1) {
my ($a, $b) = (shift @a, shift @b);
return 0 unless(defined($a) || defined($b));
# shorter version strings looses (by equal beginning)
return 1 unless(defined($b));
return -1 unless(defined($a));
# integer part wins over string part
return 1 if($a =~ /^\d/ && $b =~ /^[a-z]/i);
return -1 if ($a =~ /^[a-z]/i && $b =~ /^\d/);
# compare version parts as int or string
if($a =~ /^\d+$/) {
my $cmp = $a <=> $b;
return $cmp if($cmp);
}
else {
my $cmp = $a cmp $b;
return $cmp if($cmp);
}
}
}
1;
Mini Shell