+++ /dev/null
-#!/usr/bin/perl -w
-#
-# Copyright 2005-2009 - Steven Rostedt
-# Licensed under the terms of the GNU GPL License version 2
-#
-# It's simple enough to figure out how this works.
-# If not, then you can ask me at stripconfig@goodmis.org
-#
-# What it does?
-#
-# If you have installed a Linux kernel from a distribution
-# that turns on way too many modules than you need, and
-# you only want the modules you use, then this program
-# is perfect for you.
-#
-# It gives you the ability to turn off all the modules that are
-# not loaded on your system.
-#
-# Howto:
-#
-# 1. Boot up the kernel that you want to stream line the config on.
-# 2. Change directory to the directory holding the source of the
-# kernel that you just booted.
-# 3. Copy the configuraton file to this directory as .config
-# 4. Have all your devices that you need modules for connected and
-# operational (make sure that their corresponding modules are loaded)
-# 5. Run this script redirecting the output to some other file
-# like config_strip.
-# 6. Back up your old config (if you want too).
-# 7. copy the config_strip file to .config
-# 8. Run "make oldconfig"
-#
-# Now your kernel is ready to be built with only the modules that
-# are loaded.
-#
-# Here's what I did with my Debian distribution.
-#
-# cd /usr/src/linux-2.6.10
-# cp /boot/config-2.6.10-1-686-smp .config
-# ~/bin/streamline_config > config_strip
-# mv .config config_sav
-# mv config_strip .config
-# make oldconfig
-#
-use strict;
-use Getopt::Long;
-
-my $config = ".config";
-
-my $uname = `uname -r`;
-chomp $uname;
-
-my @searchconfigs = (
- {
- "file" => ".config",
- "exec" => "cat",
- },
- {
- "file" => "/proc/config.gz",
- "exec" => "zcat",
- },
- {
- "file" => "/boot/config-$uname",
- "exec" => "cat",
- },
- {
- "file" => "/boot/vmlinuz-$uname",
- "exec" => "scripts/extract-ikconfig",
- "test" => "scripts/extract-ikconfig",
- },
- {
- "file" => "vmlinux",
- "exec" => "scripts/extract-ikconfig",
- "test" => "scripts/extract-ikconfig",
- },
- {
- "file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
- "exec" => "scripts/extract-ikconfig",
- "test" => "scripts/extract-ikconfig",
- },
- {
- "file" => "kernel/configs.ko",
- "exec" => "scripts/extract-ikconfig",
- "test" => "scripts/extract-ikconfig",
- },
- {
- "file" => "kernel/configs.o",
- "exec" => "scripts/extract-ikconfig",
- "test" => "scripts/extract-ikconfig",
- },
-);
-
-sub find_config {
- foreach my $conf (@searchconfigs) {
- my $file = $conf->{"file"};
-
- next if ( ! -f "$file");
-
- if (defined($conf->{"test"})) {
- `$conf->{"test"} $conf->{"file"} 2>/dev/null`;
- next if ($?);
- }
-
- my $exec = $conf->{"exec"};
-
- print STDERR "using config: '$file'\n";
-
- open(CIN, "$exec $file |") || die "Failed to run $exec $file";
- return;
- }
- die "No config file found";
-}
-
-find_config;
-
-# Parse options
-my $localmodconfig = 0;
-my $localyesconfig = 0;
-
-GetOptions("localmodconfig" => \$localmodconfig,
- "localyesconfig" => \$localyesconfig);
-
-# Get the build source and top level Kconfig file (passed in)
-my $ksource = $ARGV[0];
-my $kconfig = $ARGV[1];
-my $lsmod_file = $ENV{'LSMOD'};
-
-my @makefiles = `find $ksource -name Makefile 2>/dev/null`;
-chomp @makefiles;
-
-my %depends;
-my %selects;
-my %prompts;
-my %objects;
-my $var;
-my $iflevel = 0;
-my @ifdeps;
-
-# prevent recursion
-my %read_kconfigs;
-
-sub read_kconfig {
- my ($kconfig) = @_;
-
- my $state = "NONE";
- my $config;
- my @kconfigs;
-
- my $cont = 0;
- my $line;
-
- my $source = "$ksource/$kconfig";
- my $last_source = "";
-
- # Check for any environment variables used
- while ($source =~ /\$(\w+)/ && $last_source ne $source) {
- my $env = $1;
- $last_source = $source;
- $source =~ s/\$$env/$ENV{$env}/;
- }
-
- open(KIN, "$source") || die "Can't open $kconfig";
- while (<KIN>) {
- chomp;
-
- # Make sure that lines ending with \ continue
- if ($cont) {
- $_ = $line . " " . $_;
- }
-
- if (s/\\$//) {
- $cont = 1;
- $line = $_;
- next;
- }
-
- $cont = 0;
-
- # collect any Kconfig sources
- if (/^source\s*"(.*)"/) {
- $kconfigs[$#kconfigs+1] = $1;
- }
-
- # configs found
- if (/^\s*(menu)?config\s+(\S+)\s*$/) {
- $state = "NEW";
- $config = $2;
-
- for (my $i = 0; $i < $iflevel; $i++) {
- if ($i) {
- $depends{$config} .= " " . $ifdeps[$i];
- } else {
- $depends{$config} = $ifdeps[$i];
- }
- $state = "DEP";
- }
-
- # collect the depends for the config
- } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
- $state = "DEP";
- $depends{$config} = $1;
- } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
- $depends{$config} .= " " . $1;
-
- # Get the configs that select this config
- } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
- if (defined($selects{$1})) {
- $selects{$1} .= " " . $config;
- } else {
- $selects{$1} = $config;
- }
-
- # configs without prompts must be selected
- } elsif ($state ne "NONE" && /^\s*tristate\s\S/) {
- # note if the config has a prompt
- $prompts{$config} = 1;
-
- # Check for if statements
- } elsif (/^if\s+(.*\S)\s*$/) {
- my $deps = $1;
- # remove beginning and ending non text
- $deps =~ s/^[^a-zA-Z0-9_]*//;
- $deps =~ s/[^a-zA-Z0-9_]*$//;
-
- my @deps = split /[^a-zA-Z0-9_]+/, $deps;
-
- $ifdeps[$iflevel++] = join ':', @deps;
-
- } elsif (/^endif/) {
-
- $iflevel-- if ($iflevel);
-
- # stop on "help"
- } elsif (/^\s*help\s*$/) {
- $state = "NONE";
- }
- }
- close(KIN);
-
- # read in any configs that were found.
- foreach $kconfig (@kconfigs) {
- if (!defined($read_kconfigs{$kconfig})) {
- $read_kconfigs{$kconfig} = 1;
- read_kconfig($kconfig);
- }
- }
-}
-
-if ($kconfig) {
- read_kconfig($kconfig);
-}
-
-sub convert_vars {
- my ($line, %vars) = @_;
-
- my $process = "";
-
- while ($line =~ s/^(.*?)(\$\((.*?)\))//) {
- my $start = $1;
- my $variable = $2;
- my $var = $3;
-
- if (defined($vars{$var})) {
- $process .= $start . $vars{$var};
- } else {
- $process .= $start . $variable;
- }
- }
-
- $process .= $line;
-
- return $process;
-}
-
-# Read all Makefiles to map the configs to the objects
-foreach my $makefile (@makefiles) {
-
- my $line = "";
- my %make_vars;
-
- open(MIN,$makefile) || die "Can't open $makefile";
- while (<MIN>) {
- # if this line ends with a backslash, continue
- chomp;
- if (/^(.*)\\$/) {
- $line .= $1;
- next;
- }
-
- $line .= $_;
- $_ = $line;
- $line = "";
-
- my $objs;
-
- $_ = convert_vars($_, %make_vars);
-
- # collect objects after obj-$(CONFIG_FOO_BAR)
- if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
- $var = $1;
- $objs = $2;
-
- # check if variables are set
- } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) {
- $make_vars{$1} = $2;
- }
- if (defined($objs)) {
- foreach my $obj (split /\s+/,$objs) {
- $obj =~ s/-/_/g;
- if ($obj =~ /(.*)\.o$/) {
- # Objects may be enabled by more than one config.
- # Store configs in an array.
- my @arr;
-
- if (defined($objects{$1})) {
- @arr = @{$objects{$1}};
- }
-
- $arr[$#arr+1] = $var;
-
- # The objects have a hash mapping to a reference
- # of an array of configs.
- $objects{$1} = \@arr;
- }
- }
- }
- }
- close(MIN);
-}
-
-my %modules;
-
-if (defined($lsmod_file)) {
- if ( ! -f $lsmod_file) {
- if ( -f $ENV{'objtree'}."/".$lsmod_file) {
- $lsmod_file = $ENV{'objtree'}."/".$lsmod_file;
- } else {
- die "$lsmod_file not found";
- }
- }
- if ( -x $lsmod_file) {
- # the file is executable, run it
- open(LIN, "$lsmod_file|");
- } else {
- # Just read the contents
- open(LIN, "$lsmod_file");
- }
-} else {
-
- # see what modules are loaded on this system
- my $lsmod;
-
- foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) {
- if ( -x "$dir/lsmod" ) {
- $lsmod = "$dir/lsmod";
- last;
- }
-}
- if (!defined($lsmod)) {
- # try just the path
- $lsmod = "lsmod";
- }
-
- open(LIN,"$lsmod|") || die "Can not call lsmod with $lsmod";
-}
-
-while (<LIN>) {
- next if (/^Module/); # Skip the first line.
- if (/^(\S+)/) {
- $modules{$1} = 1;
- }
-}
-close (LIN);
-
-# add to the configs hash all configs that are needed to enable
-# a loaded module.
-my %configs;
-foreach my $module (keys(%modules)) {
- if (defined($objects{$module})) {
- my @arr = @{$objects{$module}};
- foreach my $conf (@arr) {
- $configs{$conf} = $module;
- }
- } else {
- # Most likely, someone has a custom (binary?) module loaded.
- print STDERR "$module config not found!!\n";
- }
-}
-
-my $valid = "A-Za-z_0-9";
-my $repeat = 1;
-
-#
-# Note, we do not care about operands (like: &&, ||, !) we want to add any
-# config that is in the depend list of another config. This script does
-# not enable configs that are not already enabled. If we come across a
-# config A that depends on !B, we can still add B to the list of depends
-# to keep on. If A was on in the original config, B would not have been
-# and B would not be turned on by this script.
-#
-sub parse_config_dep_select
-{
- my ($p) = @_;
-
- while ($p =~ /[$valid]/) {
-
- if ($p =~ /^[^$valid]*([$valid]+)/) {
- my $conf = "CONFIG_" . $1;
-
- $p =~ s/^[^$valid]*[$valid]+//;
-
- if (!defined($configs{$conf})) {
- # We must make sure that this config has its
- # dependencies met.
- $repeat = 1; # do again
- $configs{$conf} = 1;
- }
- } else {
- die "this should never happen";
- }
- }
-}
-
-while ($repeat) {
- $repeat = 0;
-
- foreach my $config (keys %configs) {
- $config =~ s/^CONFIG_//;
-
- if (defined($depends{$config})) {
- # This config has dependencies. Make sure they are also included
- parse_config_dep_select $depends{$config};
- }
-
- if (defined($prompts{$config}) || !defined($selects{$config})) {
- next;
- }
-
- # config has no prompt and must be selected.
- parse_config_dep_select $selects{$config};
- }
-}
-
-my %setconfigs;
-
-# Finally, read the .config file and turn off any module enabled that
-# we could not find a reason to keep enabled.
-while(<CIN>) {
-
- if (/CONFIG_IKCONFIG/) {
- if (/# CONFIG_IKCONFIG is not set/) {
- # enable IKCONFIG at least as a module
- print "CONFIG_IKCONFIG=m\n";
- # don't ask about PROC
- print "# CONFIG_IKCONFIG_PROC is not set\n";
- } else {
- print;
- }
- next;
- }
-
- if (/^(CONFIG.*)=(m|y)/) {
- if (defined($configs{$1})) {
- if ($localyesconfig) {
- $setconfigs{$1} = 'y';
- } else {
- $setconfigs{$1} = $2;
- }
- } elsif ($2 eq "m") {
- print "# $1 is not set\n";
- next;
- }
- }
- print;
-}
-close(CIN);
-
-# Integrity check, make sure all modules that we want enabled do
-# indeed have their configs set.
-loop:
-foreach my $module (keys(%modules)) {
- if (defined($objects{$module})) {
- my @arr = @{$objects{$module}};
- foreach my $conf (@arr) {
- if (defined($setconfigs{$conf})) {
- next loop;
- }
- }
- print STDERR "module $module did not have configs";
- foreach my $conf (@arr) {
- print STDERR " " , $conf;
- }
- print STDERR "\n";
- }
-}
projects / kconfig-frontends / commitdiff