Current File : //usr/share/perl5/NeedRestart/Kernel/Linux.pm
# 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::Linux;
use strict;
use warnings;
use NeedRestart::Utils;
use NeedRestart::Kernel;
use NeedRestart::Strings;
use POSIX qw(uname);
use Sort::Naturally;
use Locale::TextDomain 'needrestart';
use Fcntl qw(SEEK_SET);
use constant {
NRK_LNX_GETVER_HELPER => q(/usr/lib/needrestart/vmlinuz-get-version),
};
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(
nr_linux_version_x86
nr_linux_version_generic
);
my $LOGPREF = '[Kernel/Linux]';
sub nr_linux_version_x86($$) {
my $debug = shift;
my $fn = shift;
my $fh;
unless(open($fh, '<', $fn)) {
print STDERR "$LOGPREF Could not open linux image ($fn): $!\n" if($debug);
return undef;
}
binmode($fh);
my $buf;
# get kernel_version address from header
seek($fh, 0x20e, SEEK_SET);
read($fh, $buf, 2);
my $offset = unpack 'v', $buf;
# get kernel_version string
seek($fh, 0x200 + $offset, SEEK_SET);
read($fh, $buf, 128);
close($fh);
$buf =~ s/\000.*$//;
return undef if($buf eq '');
unless($buf =~ /^\d+\.\d+/) {
print STDERR "$LOGPREF Got garbage from linux image header ($fn): '$buf'\n" if($debug);
return undef;
}
return ($buf, 1);
}
sub nr_linux_version_generic($$) {
my $debug = shift;
my $fn = shift;
# use helper script to get version string
if(-x NRK_LNX_GETVER_HELPER) {
my $fh = nr_fork_pipe($debug, NRK_LNX_GETVER_HELPER, $fn, $debug);
if($fh) {
my $verstr = <$fh>;
close($fh);
if($verstr) {
chomp($verstr);
return ($verstr, 1) ;
}
}
}
else {
print STDERR "$LOGPREF ".(NRK_LNX_GETVER_HELPER)." is n/a\n" if($debug);
}
# fallback trying filename
$fn =~ s/[^-]*-//;
$fn =~ s/\.img$//;
if($fn =~ /^\d+\.\d+/) {
print STDERR "$LOGPREF version from filename: $fn\n" if($debug);
return ($fn, 0);
}
return undef;
}
sub nr_kernel_check_real {
my $debug = shift;
my $filter = shift;
my $ui = shift;
my %vars;
my ($sysname, $nodename, $release, $version, $machine) = uname;
my $is_x86 = ($machine =~ /^(i\d86|x86_64)$/);
$vars{KVERSION} = $release;
die "$LOGPREF Not running on Linux!\n" unless($sysname eq 'Linux');
my %kfiles = map {
$_ => 1,
} grep {
# whitelist kernel images
m/$filter/;
}
grep {
# filter initrd images
(!m@^/boot/init@);
} (</boot/vmlinu*>, </boot/*.img>, </boot/kernel*>);
$ui->progress_prep(scalar keys %kfiles, __ 'Scanning linux images...');
my %kernels;
foreach my $fn (reverse nsort keys %kfiles) {
$ui->progress_step;
my $stat = nr_stat($fn);
unless(defined($stat)) {
print STDERR "$LOGPREF could not stat(2) on $fn\n" if($debug);
next;
}
if($stat->{size} < 1000000) {
print STDERR "$LOGPREF $fn seems to be too small\n" if($debug);
next;
}
my $verstr;
my $abidtc;
if($is_x86) {
($verstr, $abidtc) = nr_linux_version_x86($debug, $fn);
}
unless(defined($verstr)) {
($verstr, $abidtc) = nr_linux_version_generic($debug, $fn);
}
unless(defined($verstr)) {
print STDERR "$LOGPREF Could not get version string from $fn.\n" if($debug);
next;
}
$vars{ABIDETECT} += $abidtc;
my $iversion = $verstr;
$iversion =~ s/^Linux version //;
$iversion =~ s/\s.+$//s;
$kernels{$iversion} = (index($verstr, $release) != -1 && index($verstr, $version) != -1);
print STDERR "$LOGPREF $fn => $verstr [$iversion]".($kernels{$iversion} ? '*' : '')."\n" if($debug);
}
$ui->progress_fin;
unless(scalar keys %kernels) {
print STDERR "$LOGPREF Did not find any linux images.\n" if($debug);
return (NRK_UNKNOWN, %vars);
}
if(-e "/etc/redhat-release" && !-e "/etc/debian_version") {
print STDERR "$LOGPREF using RPM version sorting\n" if($debug);
($vars{EVERSION}) = reverse sort { nr_kernel_vcmp_rpm($a, $b); } keys %kernels;
}
else {
($vars{EVERSION}) = reverse sort { nr_kernel_vcmp($a, $b); } keys %kernels;
}
print STDERR "$LOGPREF Expected linux version: $vars{EVERSION}\n" if($debug);
return (NRK_VERUPGRADE, %vars) if($vars{KVERSION} ne $vars{EVERSION});
return (NRK_ABIUPGRADE, %vars) unless(!$is_x86 || $kernels{$release});
return (NRK_NOUPGRADE, %vars);
}
1;
Mini Shell