kernel/scripts/configdiff.pl
2010-07-29 19:24:43 -07:00

77 lines
1.6 KiB
Perl

#! /usr/bin/perl
my @args=@ARGV;
my @configoptions;
my @configvalues;
my @alreadyprinted;
my $configcounter = 0;
# first, read the override file
open (FILE,"$args[0]") || die "Could not open $args[0]";
while (<FILE>) {
my $str = $_;
if (/\# ([\w]+) is not set/) {
$configoptions[$configcounter] = $1;
$configvalues[$configcounter] = $str;
$alreadprinted[$configcounter] = 0;
$configcounter ++;
} else {
if (/([\w]+)=/) {
$configoptions[$configcounter] = $1;
$configvalues[$configcounter] = $str;
$alreadprinted[$configcounter] = 0;
$configcounter ++;
} else {
$configoptions[$configcounter] = "$_";
$configvalues[$configcounter] = $str;
$alreadprinted[$configcounter] = 0;
$configcounter ++;
}
}
};
# now, read and output the entire configfile, except for the overridden
# parts... for those the new value is printed.
# O(N^2) algorithm so if this is slow I need to look at it later
open (FILE2,"$args[1]") || die "Could not open $args[1]";
while (<FILE2>) {
my $nooutput;
my $counter;
my $configname="$_";
my $match;
if (/\# ([\w]+) is not set/) {
$configname = $1;
} else {
if (/([\w]+)=/) {
$configname = $1;
}
}
$counter = 0;
$nooutput = 0;
$match = 0;
# print "C : $configname";
while ($counter < $configcounter) {
if ("$configname" eq "$configoptions[$counter]") {
if ( ("$_" eq "$configvalues[$counter]") || ("$configname" eq "") ) {
$match = 1;
} else {
$alreadyprinted[$configcounter] = 1;
print "$_";
$match = 1;
}
}
$counter++;
}
if ($match == 0) {
print "$_";
}
}
1;