ksplice-view.in

   1 #!/usr/bin/perl
   2
   3 # Copyright (C) 2008  Jeffrey Brian Arnold <jbarnold@mit.edu>
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License, version 2.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program; if not, write to the Free Software
  15 # Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
  16 # 02110-1301, USA.
  17
  18 use Getopt::Long;
  19 use Cwd 'abs_path', 'getcwd';
  20 use File::Basename;
  21 use File::Copy;
  22 use File::Path;
  23 use File::Temp;
  24 use Fatal qw(:void copy rename move chdir mkdir unlink rmtree);
  25 use Pod::Usage;
  26 use strict;
  27 use warnings;
  28 use lib 'KSPLICE_DATA_DIR';
  29 use ksplice;
  30 use verbose qw(copy rename move chdir mkdir mkpath unlink rmtree mktemp mkdtemp);
  31
  32 my ($kid, $file);
  33 my ($help, $wantversion) = (0, 0);
  34 GetOptions("help|?" => \$help,
  35         "version" => \$wantversion,
  36         "verbose|v!" => \$verbose::level,
  37         "id=s" => \$kid,
  38         "file=s" => \$file) or pod2usage(1);
  39
  40 if($wantversion) {
  41         print $version_str;
  42         exit(0);
  43 }
  44 pod2usage(1) if($help || scalar(@ARGV) != 0);
  45 my $actions = (defined $kid) + (defined $file);
  46 pod2usage(1) if($actions > 1);
  47
  48 view_kid() if(defined $kid);
  49 view_file() if(defined $file);
  50 view_list() if($actions == 0);
  51
  52 exit(0);
  53
  54 sub view_kid {
  55         $kid =~ s/^ksplice[_-]//;
  56
  57         if(! -d "/sys/module") {
  58                 print "/sys not mounted?\n";
  59                 exit(1);
  60         }
  61         if(! -d "/sys/module/ksplice_$kid/ksplice") {
  62                 print "Ksplice id $kid is not present in the kernel\n";
  63         }
  64
  65         open STAGE, '<', "/sys/module/ksplice_$kid/ksplice/stage" or die $!;
  66         my $stage = <STAGE>;
  67         close STAGE;
  68         chomp($stage);
  69         print "Ksplice id $kid is present in the kernel and is $stage.\n";
  70 }
  71
  72 sub view_file {
  73         $file = abs_path($file);
  74
  75         my $tmpdir = init_tmpdir();
  76         chdir($tmpdir);
  77         runval("cp $file .");
  78         my $ksplice = unpack_update($file);
  79         print runstr("cat $ksplice/patch");
  80         chdir("/");
  81         rmtree($tmpdir);
  82 }
  83
  84 sub view_list {
  85         chdir("/sys/module");
  86         foreach $kid (glob("ksplice_*")) {
  87                 $kid =~ s/^ksplice_//;
  88                 open STAGE, '<', "/sys/module/ksplice_$kid/ksplice/stage" or next;
  89                 print "$kid\n" if(<STAGE> eq "applied\n");
  90                 close STAGE;
  91         }
  92 }
  93
  94 =head1 NAME
  95
  96 ksplice-view - View in-kernel or on-disk Ksplice kernel updates
  97
  98 =head1 SYNOPSIS
  99
 100 B<ksplice-view> [B<--id=>I<KSPLICE_ID> | B<--file=>I<UPDATE_TARBALL>]
 101
 102 =head1 DESCRIPTION
 103
 104 When called with no arguments, B<ksplice-view> lists the identification tags of
 105 all of the Ksplice updates that are currently present in the running kernel.
 106
 107 B<ksplice-view> can report about a specific Ksplice update when given the
 108 update's identification tag (if the update is in the kernel) or given the
 109 update's tarball filename I<UPDATE_TARBALL> (if the update is on disk).
 110
 111 =head1 SEE ALSO
 112
 113 L<ksplice-create(8)>, L<ksplice-apply(8)>, L<ksplice-undo(8)>
 114
 115 =head1 COPYRIGHT
 116
 117 Copyright (C) 2008  Jeffrey Brian Arnold <jbarnold@mit.edu>.
 118
 119 This is free software and documentation.  You can redistribute and/or modify it
 120 under the terms of the GNU General Public License, version 2.
 121
 122 =cut