1 | #!/usr/bin/perl -w |
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2 | # |
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3 | # Subroutines related to Kernel brought by the MondoRescue project |
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4 | # |
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5 | # $Id$ |
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6 | # |
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7 | # Copyright B. Cornec 2008-2014 |
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8 | # Provided under the GPL v2 |
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9 | |
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10 | package MondoRescue::Kernel; |
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11 | |
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12 | use strict 'vars'; |
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13 | use Data::Dumper; |
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14 | use POSIX "uname"; |
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15 | use lib qw (lib); |
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16 | use ProjectBuilder::Base; |
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17 | use ProjectBuilder::Conf; |
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18 | use MondoRescue::Base; |
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19 | use MondoRescue::Inventory; |
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20 | |
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21 | # Inherit from the "Exporter" module which handles exporting functions. |
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22 | |
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23 | use Exporter; |
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24 | |
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25 | # Export, by default, all the functions into the namespace of |
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26 | # any code which uses this module. |
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27 | |
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28 | our @ISA = qw(Exporter); |
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29 | our @EXPORT = qw(mr_kernel_get_version mr_kernel_get_modules); |
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30 | |
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31 | =pod |
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32 | |
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33 | =head1 NAME |
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34 | |
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35 | MondoRescue::Kernel, part of the mondorescue.org |
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36 | |
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37 | =head1 DESCRIPTION |
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38 | |
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39 | This modules provides low level functions for Kernel support in the Mondorescue project |
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40 | |
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41 | =head1 USAGE |
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42 | |
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43 | =over 4 |
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44 | |
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45 | =item B<mr_kernel_get_version> |
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46 | |
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47 | This function checks the kernel and returns back its version |
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48 | |
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49 | =cut |
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50 | |
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51 | sub mr_kernel_get_version { |
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52 | |
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53 | my ($os,$ver,$kernelver,$rest); |
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54 | |
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55 | # By default we don't know how it works for other OSes |
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56 | $kernelver = "unknown"; |
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57 | |
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58 | my ($sysname, $nodename, $release, $version, $machine ) = uname(); |
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59 | $kernelver = $release if (defined $release); |
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60 | |
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61 | return($kernelver); |
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62 | } |
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63 | |
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64 | |
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65 | =item B<mr_kernel_get_modules> |
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66 | |
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67 | Tis function takes as input the kernel version to examined (can be undef in which case the running kernel is used) and a list of modules names to examined as well (can be undef in which case all modules ar taken) |
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68 | This function returns back the modules path as a first argument and the list of relative modules path for the modules names passed. |
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69 | |
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70 | Example: |
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71 | mr_kernel_get_modules("3.8.13.4-desktop-1.mga3","ext3") returns |
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72 | ("/lib/modules/3.8.13.4-desktop-1.mga3", "kernel/fs/ext3/ext3.ko.xz","kernel/fs/jbd/jbd.ko.xz") |
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73 | |
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74 | =cut |
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75 | |
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76 | sub mr_kernel_get_modules { |
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77 | |
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78 | my @allmodules = @_; |
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79 | my $ver = shift @allmodules; |
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80 | $ver = mr_kernel_get_version() if (not defined ($ver)); |
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81 | |
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82 | my $module = ""; |
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83 | my %modlist; |
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84 | my $void = ""; |
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85 | my @alllivemodules; |
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86 | my @allmodpaths; |
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87 | my $modulepath = ""; |
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88 | |
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89 | #print Dumper(@allmodules); |
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90 | |
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91 | # First compute the list of "live" modules - run on the system |
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92 | open(LSMOD, "cat /proc/modules |") or die "Unable to launch lsmod"; |
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93 | while (<LSMOD>) { |
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94 | next if (/^Module/); |
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95 | ($module, $void) = split(/ /); |
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96 | pb_log(2,"***$module***|***$void***\n"); |
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97 | push @alllivemodules,$module; |
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98 | } |
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99 | close(LSMOD); |
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100 | |
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101 | # If no module name list passed as parameter, then work on all modules of the system |
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102 | if (not defined $allmodules[0]) { |
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103 | @allmodules = @alllivemodules; |
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104 | } |
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105 | #print Dumper(@allmodules); |
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106 | |
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107 | # Now computes the dependencies of each module and store them in %modlist |
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108 | open(DEPMOD, "/sbin/depmod -n $ver |") or die "Unable to launch depmod"; |
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109 | while (<DEPMOD>) { |
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110 | ($module, $void) = split(/:/); |
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111 | last if ($module =~ /^#/); |
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112 | chomp($void); |
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113 | $void =~ s/\s+//; |
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114 | $modlist{$module} = $void; |
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115 | pb_log(2,"Depmod on $module gives $void\n"); |
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116 | } |
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117 | close(DEPMOD); |
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118 | |
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119 | #print Dumper(%modlist)."\n"; |
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120 | |
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121 | my $lib; |
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122 | my $modulep; |
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123 | my $kernelv; |
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124 | my $modpath; |
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125 | |
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126 | # Analyze each module to find its full path name |
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127 | foreach my $m (@allmodules) { |
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128 | pb_log(1,"Analyzing $m\n"); |
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129 | open(MODINFO, "/sbin/modinfo -n -k $ver $m 2>/dev/null |") or die "Unable to launch modinfo"; |
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130 | $module = <MODINFO>; |
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131 | close(MODINFO); |
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132 | if ((not defined $module) || ($module =~ '^$')) { |
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133 | pb_log(1,"WARNING: No modinfo for module $m\n"); |
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134 | next; |
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135 | } |
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136 | chomp($module); |
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137 | ($void,$lib,$modulep,$kernelv,$modpath) = split(/\//,$module,5); |
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138 | next if (not defined $modpath); |
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139 | $modulepath = "/$lib/$modulep/$kernelv"; |
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140 | pb_log(2,"modpath: $modulepath/$modpath\n"); |
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141 | push @allmodpaths,"$modulepath/$modpath",map { "$modulepath/".$_ } split(/ /,$modlist{$modpath}); |
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142 | } |
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143 | pb_log(1,"all modpaths: ".join(' ',@allmodpaths)."\n"); |
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144 | # From List::More |
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145 | my %seen = (); |
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146 | return(grep { not $seen{$_}++ } @allmodpaths); |
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147 | } |
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148 | |
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149 | =back |
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150 | |
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151 | =head1 WEB SITES |
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152 | |
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153 | The main Web site of the project is available at L<http://www.mondorescue.org/>. Bug reports should be filled using the trac instance of the project at L<http://trac.mondorescue.org/>. |
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154 | |
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155 | =head1 USER MAILING LIST |
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156 | |
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157 | The mailing list of the project is available at L<mailto:mondo@lists.sf.net> |
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158 | |
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159 | =head1 AUTHORS |
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160 | |
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161 | The Mondorescue.org team L<http://www.mondorescue.org/> lead by Bruno Cornec L<mailto:bruno@mondorescue.org>. |
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162 | |
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163 | =head1 COPYRIGHT |
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164 | |
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165 | This module is distributed under the GPL v2.0 license |
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166 | described in the file C<COPYING> included with the distribution. |
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167 | |
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168 | =cut |
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169 | |
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170 | 1; |
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171 | |
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