Created
November 16, 2012 00:40
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show variablesと今再起動したときのvariablesの差分出せるかなと思ってみたけど挫折した
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#!/usr/bin/env perl | |
use strict; | |
use warnings; | |
my $config = fetch_config(); | |
my $variables = fetch_variables(@ARGV); | |
print_diff($config, $variables); | |
sub fetch_config { | |
my @ret = `mysqld --help --verbose 2>/dev/null`; | |
chomp @ret; | |
my $config_val; | |
my $i = 0; | |
$i++ while ($ret[$i] !~ /^Variables/); | |
$i += 3; | |
for ($i..$#ret) { | |
last if ($ret[$_] eq ''); | |
my ($k, $v) = ($ret[$_] =~ /^([^\s]+)\s+(.+)$/); | |
$k =~ s/_/-/g; | |
$config_val->{$k} = $v; | |
} | |
return $config_val; | |
} | |
sub fetch_variables { | |
my @args = @_; | |
my @ret = `mysql -N -e 'show variables' @args`; | |
chomp @ret; | |
my $variables; | |
for my $line (@ret) { | |
my ($k, $v) = split /\t/, $line; | |
$k =~ s/_/-/g; | |
$variables->{$k} = $v; | |
} | |
return $variables; | |
} | |
sub print_diff { | |
my ($a, $b) = @_; | |
my %uniq_key; | |
$uniq_key{$_} = 1 for (keys %$a); | |
$uniq_key{$_} = 1 for (keys %$b); | |
my $diff; | |
for my $k (keys %uniq_key) { | |
if (exists $a->{$k} and exists $b->{$k}) { | |
next if $a->{$k} eq $b->{$k}; | |
$diff->{$k} = [$a->{$k}, $b->{$k}]; | |
} else { | |
$diff->{$k} = [$a->{$k}, 'undef'] if exists $a->{$k}; | |
$diff->{$k} = ['undef', $b->{$k}] if exists $b->{$k}; | |
} | |
} | |
for my $k (sort keys %$diff) { | |
printf("%-50s %-50s %-50s\n", $k, $diff->{$k}->[0], $diff->{$k}->[1]); | |
} | |
} |
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