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Diffstat (limited to 'package/config/streamline_config.pl')
| -rw-r--r-- | package/config/streamline_config.pl | 451 |
1 files changed, 0 insertions, 451 deletions
diff --git a/package/config/streamline_config.pl b/package/config/streamline_config.pl deleted file mode 100644 index fd81fc33d..000000000 --- a/package/config/streamline_config.pl +++ /dev/null @@ -1,451 +0,0 @@ -#!/usr/bin/perl -w -# -# Copywrite 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; - -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; - -# Get the build source and top level Kconfig file (passed in) -my $ksource = $ARGV[0]; -my $kconfig = $ARGV[1]; -my $lsmod_file = $ARGV[2]; - -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); -} - -# Read all Makefiles to map the configs to the objects -foreach my $makefile (@makefiles) { - - my $cont = 0; - - open(MIN,$makefile) || die "Can't open $makefile"; - while (<MIN>) { - my $objs; - - # is this a line after a line with a backslash? - if ($cont && /(\S.*)$/) { - $objs = $1; - } - $cont = 0; - - # collect objects after obj-$(CONFIG_FOO_BAR) - if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) { - $var = $1; - $objs = $2; - } - if (defined($objs)) { - # test if the line ends with a backslash - if ($objs =~ m,(.*)\\$,) { - $objs = $1; - $cont = 1; - } - - 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 $lsmod_file) { - die "$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})) { - $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"; - } -} |