Commit | Line | Data |
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cb77f0d6 | 1 | #!/usr/bin/env perl |
0c874100 | 2 | # SPDX-License-Identifier: GPL-2.0 |
dcc60243 | 3 | # |
cce1dac8 | 4 | # Copyright 2005-2009 - Steven Rostedt |
dcc60243 SR |
5 | # |
6 | # It's simple enough to figure out how this works. | |
7 | # If not, then you can ask me at stripconfig@goodmis.org | |
8 | # | |
9 | # What it does? | |
10 | # | |
11 | # If you have installed a Linux kernel from a distribution | |
12 | # that turns on way too many modules than you need, and | |
13 | # you only want the modules you use, then this program | |
14 | # is perfect for you. | |
15 | # | |
16 | # It gives you the ability to turn off all the modules that are | |
17 | # not loaded on your system. | |
18 | # | |
19 | # Howto: | |
20 | # | |
21 | # 1. Boot up the kernel that you want to stream line the config on. | |
22 | # 2. Change directory to the directory holding the source of the | |
23 | # kernel that you just booted. | |
21f8b32f | 24 | # 3. Copy the configuration file to this directory as .config |
dcc60243 SR |
25 | # 4. Have all your devices that you need modules for connected and |
26 | # operational (make sure that their corresponding modules are loaded) | |
27 | # 5. Run this script redirecting the output to some other file | |
28 | # like config_strip. | |
29 | # 6. Back up your old config (if you want too). | |
30 | # 7. copy the config_strip file to .config | |
31 | # 8. Run "make oldconfig" | |
32 | # | |
33 | # Now your kernel is ready to be built with only the modules that | |
34 | # are loaded. | |
35 | # | |
36 | # Here's what I did with my Debian distribution. | |
37 | # | |
38 | # cd /usr/src/linux-2.6.10 | |
39 | # cp /boot/config-2.6.10-1-686-smp .config | |
40 | # ~/bin/streamline_config > config_strip | |
41 | # mv .config config_sav | |
42 | # mv config_strip .config | |
43 | # make oldconfig | |
44 | # | |
cb77f0d6 | 45 | use warnings; |
cf5a189d | 46 | use strict; |
22d550ae | 47 | use Getopt::Long; |
cf5a189d | 48 | |
4503379c SR |
49 | # set the environment variable LOCALMODCONFIG_DEBUG to get |
50 | # debug output. | |
51 | my $debugprint = 0; | |
52 | $debugprint = 1 if (defined($ENV{LOCALMODCONFIG_DEBUG})); | |
53 | ||
54 | sub dprint { | |
55 | return if (!$debugprint); | |
56 | print STDERR @_; | |
57 | } | |
58 | ||
cdfc4795 SR |
59 | my $uname = `uname -r`; |
60 | chomp $uname; | |
61 | ||
62 | my @searchconfigs = ( | |
a9024838 SR |
63 | { |
64 | "file" => ".config", | |
65 | "exec" => "cat", | |
66 | }, | |
cdfc4795 SR |
67 | { |
68 | "file" => "/proc/config.gz", | |
69 | "exec" => "zcat", | |
70 | }, | |
810b2be6 SR |
71 | { |
72 | "file" => "/boot/config-$uname", | |
73 | "exec" => "cat", | |
74 | }, | |
cdfc4795 SR |
75 | { |
76 | "file" => "/boot/vmlinuz-$uname", | |
77 | "exec" => "scripts/extract-ikconfig", | |
78 | "test" => "scripts/extract-ikconfig", | |
79 | }, | |
80 | { | |
81 | "file" => "vmlinux", | |
82 | "exec" => "scripts/extract-ikconfig", | |
83 | "test" => "scripts/extract-ikconfig", | |
84 | }, | |
85 | { | |
86 | "file" => "/lib/modules/$uname/kernel/kernel/configs.ko", | |
87 | "exec" => "scripts/extract-ikconfig", | |
88 | "test" => "scripts/extract-ikconfig", | |
89 | }, | |
90 | { | |
91 | "file" => "kernel/configs.ko", | |
92 | "exec" => "scripts/extract-ikconfig", | |
93 | "test" => "scripts/extract-ikconfig", | |
94 | }, | |
95 | { | |
96 | "file" => "kernel/configs.o", | |
97 | "exec" => "scripts/extract-ikconfig", | |
98 | "test" => "scripts/extract-ikconfig", | |
99 | }, | |
cdfc4795 SR |
100 | ); |
101 | ||
3f0c5413 | 102 | sub read_config { |
cdfc4795 SR |
103 | foreach my $conf (@searchconfigs) { |
104 | my $file = $conf->{"file"}; | |
105 | ||
106 | next if ( ! -f "$file"); | |
107 | ||
108 | if (defined($conf->{"test"})) { | |
109 | `$conf->{"test"} $conf->{"file"} 2>/dev/null`; | |
110 | next if ($?); | |
111 | } | |
112 | ||
113 | my $exec = $conf->{"exec"}; | |
114 | ||
115 | print STDERR "using config: '$file'\n"; | |
116 | ||
3f0c5413 BP |
117 | open(my $infile, '-|', "$exec $file") || die "Failed to run $exec $file"; |
118 | my @x = <$infile>; | |
119 | close $infile; | |
120 | return @x; | |
cdfc4795 SR |
121 | } |
122 | die "No config file found"; | |
123 | } | |
124 | ||
3f0c5413 | 125 | my @config_file = read_config; |
4f4c51c9 | 126 | |
22d550ae AL |
127 | # Parse options |
128 | my $localmodconfig = 0; | |
129 | my $localyesconfig = 0; | |
130 | ||
131 | GetOptions("localmodconfig" => \$localmodconfig, | |
132 | "localyesconfig" => \$localyesconfig); | |
133 | ||
463bf900 | 134 | # Get the build source and top level Kconfig file (passed in) |
224a2571 | 135 | my $ksource = ($ARGV[0] ? $ARGV[0] : '.'); |
463bf900 | 136 | my $kconfig = $ARGV[1]; |
f597a718 | 137 | my $lsmod_file = $ENV{'LSMOD'}; |
463bf900 | 138 | |
c0ddc8c7 | 139 | my @makefiles = `find $ksource -name Makefile -or -name Kbuild 2>/dev/null`; |
17431928 TF |
140 | chomp @makefiles; |
141 | ||
dcc60243 SR |
142 | my %depends; |
143 | my %selects; | |
144 | my %prompts; | |
145 | my %objects; | |
c027b02d | 146 | my %config2kfile; |
dcc60243 | 147 | my $var; |
13d7e938 SR |
148 | my $iflevel = 0; |
149 | my @ifdeps; | |
dcc60243 | 150 | |
dcc60243 SR |
151 | # prevent recursion |
152 | my %read_kconfigs; | |
153 | ||
154 | sub read_kconfig { | |
155 | my ($kconfig) = @_; | |
156 | ||
157 | my $state = "NONE"; | |
158 | my $config; | |
dcc60243 | 159 | |
20d19047 SR |
160 | my $cont = 0; |
161 | my $line; | |
162 | ||
4908980b SR |
163 | my $source = "$ksource/$kconfig"; |
164 | my $last_source = ""; | |
165 | ||
166 | # Check for any environment variables used | |
8593080c | 167 | while ($source =~ /\$\((\w+)\)/ && $last_source ne $source) { |
4908980b SR |
168 | my $env = $1; |
169 | $last_source = $source; | |
8593080c | 170 | $source =~ s/\$\($env\)/$ENV{$env}/; |
4908980b SR |
171 | } |
172 | ||
0431acd8 | 173 | open(my $kinfile, '<', $source) || die "Can't open $source"; |
e0d28694 | 174 | while (<$kinfile>) { |
dcc60243 SR |
175 | chomp; |
176 | ||
20d19047 SR |
177 | # Make sure that lines ending with \ continue |
178 | if ($cont) { | |
179 | $_ = $line . " " . $_; | |
180 | } | |
181 | ||
182 | if (s/\\$//) { | |
183 | $cont = 1; | |
184 | $line = $_; | |
185 | next; | |
186 | } | |
187 | ||
188 | $cont = 0; | |
189 | ||
dcc60243 | 190 | # collect any Kconfig sources |
296471ad | 191 | if (/^source\s+"?([^"]+)/) { |
ced9cb1a SR |
192 | my $kconfig = $1; |
193 | # prevent reading twice. | |
194 | if (!defined($read_kconfigs{$kconfig})) { | |
195 | $read_kconfigs{$kconfig} = 1; | |
196 | read_kconfig($kconfig); | |
197 | } | |
198 | next; | |
dcc60243 SR |
199 | } |
200 | ||
201 | # configs found | |
8ef17fa2 | 202 | if (/^\s*(menu)?config\s+(\S+)\s*$/) { |
dcc60243 | 203 | $state = "NEW"; |
8ef17fa2 | 204 | $config = $2; |
c027b02d | 205 | $config2kfile{"CONFIG_$config"} = $kconfig; |
dcc60243 | 206 | |
0b58a99e | 207 | # Add depends for 'if' nesting |
13d7e938 SR |
208 | for (my $i = 0; $i < $iflevel; $i++) { |
209 | if ($i) { | |
210 | $depends{$config} .= " " . $ifdeps[$i]; | |
211 | } else { | |
212 | $depends{$config} = $ifdeps[$i]; | |
213 | } | |
214 | $state = "DEP"; | |
215 | } | |
216 | ||
dcc60243 SR |
217 | # collect the depends for the config |
218 | } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) { | |
219 | $state = "DEP"; | |
220 | $depends{$config} = $1; | |
221 | } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) { | |
222 | $depends{$config} .= " " . $1; | |
95edca5c SRRH |
223 | } elsif ($state eq "DEP" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) { |
224 | my $dep = $3; | |
225 | if ($dep !~ /^\s*(y|m|n)\s*$/) { | |
226 | $dep =~ s/.*\sif\s+//; | |
227 | $depends{$config} .= " " . $dep; | |
228 | dprint "Added default depends $dep to $config\n"; | |
229 | } | |
dcc60243 SR |
230 | |
231 | # Get the configs that select this config | |
232 | } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) { | |
0b58a99e SR |
233 | my $conf = $1; |
234 | if (defined($selects{$conf})) { | |
235 | $selects{$conf} .= " " . $config; | |
dcc60243 | 236 | } else { |
0b58a99e | 237 | $selects{$conf} = $config; |
dcc60243 SR |
238 | } |
239 | ||
240 | # configs without prompts must be selected | |
5bcba792 | 241 | } elsif ($state ne "NONE" && /^\s*(tristate\s+\S|prompt\b)/) { |
dcc60243 | 242 | # note if the config has a prompt |
ccece60a | 243 | $prompts{$config} = 1; |
dcc60243 | 244 | |
13d7e938 SR |
245 | # Check for if statements |
246 | } elsif (/^if\s+(.*\S)\s*$/) { | |
247 | my $deps = $1; | |
248 | # remove beginning and ending non text | |
249 | $deps =~ s/^[^a-zA-Z0-9_]*//; | |
250 | $deps =~ s/[^a-zA-Z0-9_]*$//; | |
251 | ||
252 | my @deps = split /[^a-zA-Z0-9_]+/, $deps; | |
253 | ||
254 | $ifdeps[$iflevel++] = join ':', @deps; | |
255 | ||
256 | } elsif (/^endif/) { | |
257 | ||
258 | $iflevel-- if ($iflevel); | |
259 | ||
27b71568 | 260 | # stop on "help" and keywords that end a menu entry |
a77ed525 | 261 | } elsif (/^\s*(---)?help(---)?\s*$/ || /^(comment|choice|menu)\b/) { |
dcc60243 SR |
262 | $state = "NONE"; |
263 | } | |
264 | } | |
e0d28694 | 265 | close($kinfile); |
dcc60243 SR |
266 | } |
267 | ||
268 | if ($kconfig) { | |
269 | read_kconfig($kconfig); | |
270 | } | |
271 | ||
0b58a99e | 272 | # Makefiles can use variables to define their dependencies |
364212fd SR |
273 | sub convert_vars { |
274 | my ($line, %vars) = @_; | |
275 | ||
276 | my $process = ""; | |
277 | ||
278 | while ($line =~ s/^(.*?)(\$\((.*?)\))//) { | |
279 | my $start = $1; | |
280 | my $variable = $2; | |
281 | my $var = $3; | |
282 | ||
283 | if (defined($vars{$var})) { | |
284 | $process .= $start . $vars{$var}; | |
285 | } else { | |
286 | $process .= $start . $variable; | |
287 | } | |
288 | } | |
289 | ||
290 | $process .= $line; | |
291 | ||
292 | return $process; | |
293 | } | |
294 | ||
dcc60243 SR |
295 | # Read all Makefiles to map the configs to the objects |
296 | foreach my $makefile (@makefiles) { | |
dcc60243 | 297 | |
d060d963 | 298 | my $line = ""; |
364212fd | 299 | my %make_vars; |
20d19047 | 300 | |
e0d28694 BP |
301 | open(my $infile, '<', $makefile) || die "Can't open $makefile"; |
302 | while (<$infile>) { | |
d060d963 SR |
303 | # if this line ends with a backslash, continue |
304 | chomp; | |
305 | if (/^(.*)\\$/) { | |
306 | $line .= $1; | |
307 | next; | |
dcc60243 | 308 | } |
d060d963 SR |
309 | |
310 | $line .= $_; | |
311 | $_ = $line; | |
312 | $line = ""; | |
313 | ||
314 | my $objs; | |
dcc60243 | 315 | |
0b58a99e | 316 | # Convert variables in a line (could define configs) |
364212fd SR |
317 | $_ = convert_vars($_, %make_vars); |
318 | ||
dcc60243 | 319 | # collect objects after obj-$(CONFIG_FOO_BAR) |
98d7c754 | 320 | if (/obj-\$[({](CONFIG_[^})]*)[)}]\s*[+:]?=\s*(.*)/) { |
dcc60243 SR |
321 | $var = $1; |
322 | $objs = $2; | |
364212fd SR |
323 | |
324 | # check if variables are set | |
325 | } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) { | |
326 | $make_vars{$1} = $2; | |
dcc60243 SR |
327 | } |
328 | if (defined($objs)) { | |
dcc60243 SR |
329 | foreach my $obj (split /\s+/,$objs) { |
330 | $obj =~ s/-/_/g; | |
331 | if ($obj =~ /(.*)\.o$/) { | |
1d1d1fea | 332 | # Objects may be enabled by more than one config. |
dcc60243 SR |
333 | # Store configs in an array. |
334 | my @arr; | |
335 | ||
336 | if (defined($objects{$1})) { | |
337 | @arr = @{$objects{$1}}; | |
338 | } | |
339 | ||
340 | $arr[$#arr+1] = $var; | |
341 | ||
342 | # The objects have a hash mapping to a reference | |
343 | # of an array of configs. | |
344 | $objects{$1} = \@arr; | |
345 | } | |
346 | } | |
347 | } | |
348 | } | |
e0d28694 | 349 | close($infile); |
dcc60243 SR |
350 | } |
351 | ||
352 | my %modules; | |
e0d28694 | 353 | my $linfile; |
dcc60243 | 354 | |
615f0833 SR |
355 | if (defined($lsmod_file)) { |
356 | if ( ! -f $lsmod_file) { | |
f597a718 AL |
357 | if ( -f $ENV{'objtree'}."/".$lsmod_file) { |
358 | $lsmod_file = $ENV{'objtree'}."/".$lsmod_file; | |
359 | } else { | |
360 | die "$lsmod_file not found"; | |
361 | } | |
615f0833 | 362 | } |
e0d28694 BP |
363 | |
364 | my $otype = ( -x $lsmod_file) ? '-|' : '<'; | |
365 | open($linfile, $otype, $lsmod_file); | |
366 | ||
615f0833 SR |
367 | } else { |
368 | ||
369 | # see what modules are loaded on this system | |
370 | my $lsmod; | |
371 | ||
cf5a189d | 372 | foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) { |
615f0833 SR |
373 | if ( -x "$dir/lsmod" ) { |
374 | $lsmod = "$dir/lsmod"; | |
375 | last; | |
376 | } | |
68f0d627 | 377 | } |
615f0833 SR |
378 | if (!defined($lsmod)) { |
379 | # try just the path | |
380 | $lsmod = "lsmod"; | |
381 | } | |
382 | ||
e0d28694 | 383 | open($linfile, '-|', $lsmod) || die "Can not call lsmod with $lsmod"; |
88f66ea9 SR |
384 | } |
385 | ||
e0d28694 | 386 | while (<$linfile>) { |
dcc60243 SR |
387 | next if (/^Module/); # Skip the first line. |
388 | if (/^(\S+)/) { | |
389 | $modules{$1} = 1; | |
390 | } | |
391 | } | |
e0d28694 | 392 | close ($linfile); |
dcc60243 SR |
393 | |
394 | # add to the configs hash all configs that are needed to enable | |
0b58a99e SR |
395 | # a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o |
396 | # where we know we need bar.o so we add FOO to the list. | |
dcc60243 SR |
397 | my %configs; |
398 | foreach my $module (keys(%modules)) { | |
399 | if (defined($objects{$module})) { | |
e5199edb | 400 | my @arr = @{$objects{$module}}; |
dcc60243 SR |
401 | foreach my $conf (@arr) { |
402 | $configs{$conf} = $module; | |
4503379c | 403 | dprint "$conf added by direct ($module)\n"; |
bc20d12e SR |
404 | if ($debugprint) { |
405 | my $c=$conf; | |
406 | $c =~ s/^CONFIG_//; | |
407 | if (defined($depends{$c})) { | |
408 | dprint " deps = $depends{$c}\n"; | |
409 | } else { | |
410 | dprint " no deps\n"; | |
411 | } | |
412 | } | |
dcc60243 SR |
413 | } |
414 | } else { | |
415 | # Most likely, someone has a custom (binary?) module loaded. | |
416 | print STDERR "$module config not found!!\n"; | |
417 | } | |
418 | } | |
419 | ||
4f4c51c9 SR |
420 | # Read the current config, and see what is enabled. We want to |
421 | # ignore configs that we would not enable anyway. | |
422 | ||
423 | my %orig_configs; | |
dcc60243 | 424 | my $valid = "A-Za-z_0-9"; |
4f4c51c9 SR |
425 | |
426 | foreach my $line (@config_file) { | |
427 | $_ = $line; | |
428 | ||
429 | if (/(CONFIG_[$valid]*)=(m|y)/) { | |
430 | $orig_configs{$1} = $2; | |
431 | } | |
432 | } | |
433 | ||
dcc60243 SR |
434 | my $repeat = 1; |
435 | ||
4503379c SR |
436 | my $depconfig; |
437 | ||
dcc60243 SR |
438 | # |
439 | # Note, we do not care about operands (like: &&, ||, !) we want to add any | |
440 | # config that is in the depend list of another config. This script does | |
441 | # not enable configs that are not already enabled. If we come across a | |
442 | # config A that depends on !B, we can still add B to the list of depends | |
443 | # to keep on. If A was on in the original config, B would not have been | |
444 | # and B would not be turned on by this script. | |
445 | # | |
d4bb58b5 | 446 | sub parse_config_depends |
dcc60243 SR |
447 | { |
448 | my ($p) = @_; | |
449 | ||
450 | while ($p =~ /[$valid]/) { | |
451 | ||
452 | if ($p =~ /^[^$valid]*([$valid]+)/) { | |
453 | my $conf = "CONFIG_" . $1; | |
454 | ||
455 | $p =~ s/^[^$valid]*[$valid]+//; | |
456 | ||
4f4c51c9 | 457 | # We only need to process if the depend config is a module |
5169192b | 458 | if (!defined($orig_configs{$conf}) || $orig_configs{$conf} eq "y") { |
4f4c51c9 SR |
459 | next; |
460 | } | |
461 | ||
dcc60243 SR |
462 | if (!defined($configs{$conf})) { |
463 | # We must make sure that this config has its | |
464 | # dependencies met. | |
465 | $repeat = 1; # do again | |
4503379c | 466 | dprint "$conf selected by depend $depconfig\n"; |
dcc60243 SR |
467 | $configs{$conf} = 1; |
468 | } | |
469 | } else { | |
470 | die "this should never happen"; | |
471 | } | |
472 | } | |
473 | } | |
474 | ||
d4bb58b5 SR |
475 | # Select is treated a bit differently than depends. We call this |
476 | # when a config has no prompt and requires another config to be | |
477 | # selected. We use to just select all configs that selected this | |
478 | # config, but found that that can balloon into enabling hundreds | |
479 | # of configs that we do not care about. | |
480 | # | |
481 | # The idea is we look at all the configs that select it. If one | |
482 | # is already in our list of configs to enable, then there's nothing | |
483 | # else to do. If there isn't, we pick the first config that was | |
21f8b32f | 484 | # enabled in the original config and use that. |
d4bb58b5 SR |
485 | sub parse_config_selects |
486 | { | |
487 | my ($config, $p) = @_; | |
dcc60243 | 488 | |
d4bb58b5 SR |
489 | my $next_config; |
490 | ||
491 | while ($p =~ /[$valid]/) { | |
492 | ||
493 | if ($p =~ /^[^$valid]*([$valid]+)/) { | |
494 | my $conf = "CONFIG_" . $1; | |
495 | ||
496 | $p =~ s/^[^$valid]*[$valid]+//; | |
dcc60243 | 497 | |
d4bb58b5 SR |
498 | # Make sure that this config exists in the current .config file |
499 | if (!defined($orig_configs{$conf})) { | |
4503379c | 500 | dprint "$conf not set for $config select\n"; |
d4bb58b5 SR |
501 | next; |
502 | } | |
503 | ||
504 | # Check if something other than a module selects this config | |
505 | if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") { | |
4503379c | 506 | dprint "$conf (non module) selects config, we are good\n"; |
d4bb58b5 SR |
507 | # we are good with this |
508 | return; | |
509 | } | |
510 | if (defined($configs{$conf})) { | |
4503379c | 511 | dprint "$conf selects $config so we are good\n"; |
d4bb58b5 SR |
512 | # A set config selects this config, we are good |
513 | return; | |
514 | } | |
515 | # Set this config to be selected | |
516 | if (!defined($next_config)) { | |
517 | $next_config = $conf; | |
518 | } | |
519 | } else { | |
520 | die "this should never happen"; | |
dcc60243 | 521 | } |
d4bb58b5 | 522 | } |
dcc60243 | 523 | |
d4bb58b5 SR |
524 | # If no possible config selected this, then something happened. |
525 | if (!defined($next_config)) { | |
526 | print STDERR "WARNING: $config is required, but nothing in the\n"; | |
527 | print STDERR " current config selects it.\n"; | |
528 | return; | |
529 | } | |
530 | ||
531 | # If we are here, then we found no config that is set and | |
532 | # selects this config. Repeat. | |
533 | $repeat = 1; | |
534 | # Make this config need to be selected | |
535 | $configs{$next_config} = 1; | |
4503379c | 536 | dprint "$next_config selected by select $config\n"; |
d4bb58b5 SR |
537 | } |
538 | ||
539 | my %process_selects; | |
540 | ||
541 | # loop through all configs, select their dependencies. | |
542 | sub loop_depend { | |
543 | $repeat = 1; | |
544 | ||
545 | while ($repeat) { | |
546 | $repeat = 0; | |
547 | ||
548 | forloop: | |
549 | foreach my $config (keys %configs) { | |
550 | ||
551 | # If this config is not a module, we do not need to process it | |
552 | if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") { | |
553 | next forloop; | |
554 | } | |
555 | ||
556 | $config =~ s/^CONFIG_//; | |
4503379c | 557 | $depconfig = $config; |
d4bb58b5 SR |
558 | |
559 | if (defined($depends{$config})) { | |
560 | # This config has dependencies. Make sure they are also included | |
561 | parse_config_depends $depends{$config}; | |
562 | } | |
563 | ||
564 | # If the config has no prompt, then we need to check if a config | |
565 | # that is enabled selected it. Or if we need to enable one. | |
566 | if (!defined($prompts{$config}) && defined($selects{$config})) { | |
567 | $process_selects{$config} = 1; | |
568 | } | |
dcc60243 | 569 | } |
d4bb58b5 SR |
570 | } |
571 | } | |
572 | ||
573 | sub loop_select { | |
574 | ||
575 | foreach my $config (keys %process_selects) { | |
576 | $config =~ s/^CONFIG_//; | |
dcc60243 | 577 | |
4503379c SR |
578 | dprint "Process select $config\n"; |
579 | ||
dcc60243 | 580 | # config has no prompt and must be selected. |
d4bb58b5 | 581 | parse_config_selects $config, $selects{$config}; |
dcc60243 SR |
582 | } |
583 | } | |
584 | ||
d4bb58b5 SR |
585 | while ($repeat) { |
586 | # Get the first set of configs and their dependencies. | |
587 | loop_depend; | |
588 | ||
589 | $repeat = 0; | |
590 | ||
591 | # Now we need to see if we have to check selects; | |
592 | loop_select; | |
38385f8f | 593 | } |
d4bb58b5 | 594 | |
dcc60243 | 595 | my %setconfigs; |
a73fbfce RD |
596 | my @preserved_kconfigs; |
597 | if (defined($ENV{'LMC_KEEP'})) { | |
598 | @preserved_kconfigs = split(/:/,$ENV{LMC_KEEP}); | |
599 | } | |
c027b02d CD |
600 | |
601 | sub in_preserved_kconfigs { | |
602 | my $kconfig = $config2kfile{$_[0]}; | |
603 | if (!defined($kconfig)) { | |
b83c8ba4 | 604 | return 0; |
c027b02d CD |
605 | } |
606 | foreach my $excl (@preserved_kconfigs) { | |
b83c8ba4 SRV |
607 | if($kconfig =~ /^$excl/) { |
608 | return 1; | |
609 | } | |
c027b02d CD |
610 | } |
611 | return 0; | |
612 | } | |
dcc60243 SR |
613 | |
614 | # Finally, read the .config file and turn off any module enabled that | |
615 | # we could not find a reason to keep enabled. | |
4f4c51c9 SR |
616 | foreach my $line (@config_file) { |
617 | $_ = $line; | |
744ffcbe SR |
618 | |
619 | if (/CONFIG_IKCONFIG/) { | |
620 | if (/# CONFIG_IKCONFIG is not set/) { | |
621 | # enable IKCONFIG at least as a module | |
622 | print "CONFIG_IKCONFIG=m\n"; | |
623 | # don't ask about PROC | |
d08ca277 | 624 | print "# CONFIG_IKCONFIG_PROC is not set\n"; |
744ffcbe SR |
625 | } else { |
626 | print; | |
627 | } | |
628 | next; | |
629 | } | |
630 | ||
96bab35d | 631 | if (/CONFIG_MODULE_SIG_KEY="(.+)"/) { |
b83c8ba4 SRV |
632 | my $orig_cert = $1; |
633 | my $default_cert = "certs/signing_key.pem"; | |
634 | ||
635 | # Check that the logic in this script still matches the one in Kconfig | |
636 | if (!defined($depends{"MODULE_SIG_KEY"}) || | |
637 | $depends{"MODULE_SIG_KEY"} !~ /"\Q$default_cert\E"/) { | |
638 | print STDERR "WARNING: MODULE_SIG_KEY assertion failure, ", | |
639 | "update needed to ", __FILE__, " line ", __LINE__, "\n"; | |
640 | print; | |
641 | } elsif ($orig_cert ne $default_cert && ! -f $orig_cert) { | |
642 | print STDERR "Module signature verification enabled but ", | |
643 | "module signing key \"$orig_cert\" not found. Resetting ", | |
644 | "signing key to default value.\n"; | |
645 | print "CONFIG_MODULE_SIG_KEY=\"$default_cert\"\n"; | |
646 | } else { | |
647 | print; | |
648 | } | |
649 | next; | |
96bab35d BP |
650 | } |
651 | ||
652 | if (/CONFIG_SYSTEM_TRUSTED_KEYS="(.+)"/) { | |
b83c8ba4 SRV |
653 | my $orig_keys = $1; |
654 | ||
655 | if (! -f $orig_keys) { | |
656 | print STDERR "System keyring enabled but keys \"$orig_keys\" ", | |
657 | "not found. Resetting keys to default value.\n"; | |
658 | print "CONFIG_SYSTEM_TRUSTED_KEYS=\"\"\n"; | |
659 | } else { | |
660 | print; | |
661 | } | |
662 | next; | |
96bab35d BP |
663 | } |
664 | ||
744ffcbe | 665 | if (/^(CONFIG.*)=(m|y)/) { |
b83c8ba4 SRV |
666 | if (in_preserved_kconfigs($1)) { |
667 | dprint "Preserve config $1"; | |
668 | print; | |
669 | next; | |
670 | } | |
744ffcbe | 671 | if (defined($configs{$1})) { |
22d550ae | 672 | if ($localyesconfig) { |
b83c8ba4 | 673 | $setconfigs{$1} = 'y'; |
4eae518d YA |
674 | print "$1=y\n"; |
675 | next; | |
22d550ae | 676 | } else { |
b83c8ba4 | 677 | $setconfigs{$1} = $2; |
22d550ae | 678 | } |
744ffcbe SR |
679 | } elsif ($2 eq "m") { |
680 | print "# $1 is not set\n"; | |
d08ca277 | 681 | next; |
dcc60243 | 682 | } |
744ffcbe | 683 | } |
d08ca277 | 684 | print; |
dcc60243 | 685 | } |
dcc60243 SR |
686 | |
687 | # Integrity check, make sure all modules that we want enabled do | |
688 | # indeed have their configs set. | |
689 | loop: | |
690 | foreach my $module (keys(%modules)) { | |
691 | if (defined($objects{$module})) { | |
692 | my @arr = @{$objects{$module}}; | |
693 | foreach my $conf (@arr) { | |
694 | if (defined($setconfigs{$conf})) { | |
695 | next loop; | |
696 | } | |
697 | } | |
698 | print STDERR "module $module did not have configs"; | |
699 | foreach my $conf (@arr) { | |
700 | print STDERR " " , $conf; | |
701 | } | |
702 | print STDERR "\n"; | |
703 | } | |
704 | } | |
d1b1f1e6 SRV |
705 | |
706 | # vim: softtabstop=4 |