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. | |
24 | # 3. Copy the configuraton file to this directory as .config | |
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; | |
146 | my $var; | |
13d7e938 SR |
147 | my $iflevel = 0; |
148 | my @ifdeps; | |
dcc60243 | 149 | |
dcc60243 SR |
150 | # prevent recursion |
151 | my %read_kconfigs; | |
152 | ||
153 | sub read_kconfig { | |
154 | my ($kconfig) = @_; | |
155 | ||
156 | my $state = "NONE"; | |
157 | my $config; | |
dcc60243 | 158 | |
20d19047 SR |
159 | my $cont = 0; |
160 | my $line; | |
161 | ||
4908980b SR |
162 | my $source = "$ksource/$kconfig"; |
163 | my $last_source = ""; | |
164 | ||
165 | # Check for any environment variables used | |
8593080c | 166 | while ($source =~ /\$\((\w+)\)/ && $last_source ne $source) { |
4908980b SR |
167 | my $env = $1; |
168 | $last_source = $source; | |
8593080c | 169 | $source =~ s/\$\($env\)/$ENV{$env}/; |
4908980b SR |
170 | } |
171 | ||
e0d28694 BP |
172 | open(my $kinfile, '<', $source) || die "Can't open $kconfig"; |
173 | while (<$kinfile>) { | |
dcc60243 SR |
174 | chomp; |
175 | ||
20d19047 SR |
176 | # Make sure that lines ending with \ continue |
177 | if ($cont) { | |
178 | $_ = $line . " " . $_; | |
179 | } | |
180 | ||
181 | if (s/\\$//) { | |
182 | $cont = 1; | |
183 | $line = $_; | |
184 | next; | |
185 | } | |
186 | ||
187 | $cont = 0; | |
188 | ||
dcc60243 | 189 | # collect any Kconfig sources |
296471ad | 190 | if (/^source\s+"?([^"]+)/) { |
ced9cb1a SR |
191 | my $kconfig = $1; |
192 | # prevent reading twice. | |
193 | if (!defined($read_kconfigs{$kconfig})) { | |
194 | $read_kconfigs{$kconfig} = 1; | |
195 | read_kconfig($kconfig); | |
196 | } | |
197 | next; | |
dcc60243 SR |
198 | } |
199 | ||
200 | # configs found | |
8ef17fa2 | 201 | if (/^\s*(menu)?config\s+(\S+)\s*$/) { |
dcc60243 | 202 | $state = "NEW"; |
8ef17fa2 | 203 | $config = $2; |
dcc60243 | 204 | |
0b58a99e | 205 | # Add depends for 'if' nesting |
13d7e938 SR |
206 | for (my $i = 0; $i < $iflevel; $i++) { |
207 | if ($i) { | |
208 | $depends{$config} .= " " . $ifdeps[$i]; | |
209 | } else { | |
210 | $depends{$config} = $ifdeps[$i]; | |
211 | } | |
212 | $state = "DEP"; | |
213 | } | |
214 | ||
dcc60243 SR |
215 | # collect the depends for the config |
216 | } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) { | |
217 | $state = "DEP"; | |
218 | $depends{$config} = $1; | |
219 | } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) { | |
220 | $depends{$config} .= " " . $1; | |
95edca5c SRRH |
221 | } elsif ($state eq "DEP" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) { |
222 | my $dep = $3; | |
223 | if ($dep !~ /^\s*(y|m|n)\s*$/) { | |
224 | $dep =~ s/.*\sif\s+//; | |
225 | $depends{$config} .= " " . $dep; | |
226 | dprint "Added default depends $dep to $config\n"; | |
227 | } | |
dcc60243 SR |
228 | |
229 | # Get the configs that select this config | |
230 | } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) { | |
0b58a99e SR |
231 | my $conf = $1; |
232 | if (defined($selects{$conf})) { | |
233 | $selects{$conf} .= " " . $config; | |
dcc60243 | 234 | } else { |
0b58a99e | 235 | $selects{$conf} = $config; |
dcc60243 SR |
236 | } |
237 | ||
238 | # configs without prompts must be selected | |
5bcba792 | 239 | } elsif ($state ne "NONE" && /^\s*(tristate\s+\S|prompt\b)/) { |
dcc60243 | 240 | # note if the config has a prompt |
ccece60a | 241 | $prompts{$config} = 1; |
dcc60243 | 242 | |
13d7e938 SR |
243 | # Check for if statements |
244 | } elsif (/^if\s+(.*\S)\s*$/) { | |
245 | my $deps = $1; | |
246 | # remove beginning and ending non text | |
247 | $deps =~ s/^[^a-zA-Z0-9_]*//; | |
248 | $deps =~ s/[^a-zA-Z0-9_]*$//; | |
249 | ||
250 | my @deps = split /[^a-zA-Z0-9_]+/, $deps; | |
251 | ||
252 | $ifdeps[$iflevel++] = join ':', @deps; | |
253 | ||
254 | } elsif (/^endif/) { | |
255 | ||
256 | $iflevel-- if ($iflevel); | |
257 | ||
27b71568 | 258 | # stop on "help" and keywords that end a menu entry |
a77ed525 | 259 | } elsif (/^\s*(---)?help(---)?\s*$/ || /^(comment|choice|menu)\b/) { |
dcc60243 SR |
260 | $state = "NONE"; |
261 | } | |
262 | } | |
e0d28694 | 263 | close($kinfile); |
dcc60243 SR |
264 | } |
265 | ||
266 | if ($kconfig) { | |
267 | read_kconfig($kconfig); | |
268 | } | |
269 | ||
0b58a99e | 270 | # Makefiles can use variables to define their dependencies |
364212fd SR |
271 | sub convert_vars { |
272 | my ($line, %vars) = @_; | |
273 | ||
274 | my $process = ""; | |
275 | ||
276 | while ($line =~ s/^(.*?)(\$\((.*?)\))//) { | |
277 | my $start = $1; | |
278 | my $variable = $2; | |
279 | my $var = $3; | |
280 | ||
281 | if (defined($vars{$var})) { | |
282 | $process .= $start . $vars{$var}; | |
283 | } else { | |
284 | $process .= $start . $variable; | |
285 | } | |
286 | } | |
287 | ||
288 | $process .= $line; | |
289 | ||
290 | return $process; | |
291 | } | |
292 | ||
dcc60243 SR |
293 | # Read all Makefiles to map the configs to the objects |
294 | foreach my $makefile (@makefiles) { | |
dcc60243 | 295 | |
d060d963 | 296 | my $line = ""; |
364212fd | 297 | my %make_vars; |
20d19047 | 298 | |
e0d28694 BP |
299 | open(my $infile, '<', $makefile) || die "Can't open $makefile"; |
300 | while (<$infile>) { | |
d060d963 SR |
301 | # if this line ends with a backslash, continue |
302 | chomp; | |
303 | if (/^(.*)\\$/) { | |
304 | $line .= $1; | |
305 | next; | |
dcc60243 | 306 | } |
d060d963 SR |
307 | |
308 | $line .= $_; | |
309 | $_ = $line; | |
310 | $line = ""; | |
311 | ||
312 | my $objs; | |
dcc60243 | 313 | |
0b58a99e | 314 | # Convert variables in a line (could define configs) |
364212fd SR |
315 | $_ = convert_vars($_, %make_vars); |
316 | ||
dcc60243 SR |
317 | # collect objects after obj-$(CONFIG_FOO_BAR) |
318 | if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) { | |
319 | $var = $1; | |
320 | $objs = $2; | |
364212fd SR |
321 | |
322 | # check if variables are set | |
323 | } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) { | |
324 | $make_vars{$1} = $2; | |
dcc60243 SR |
325 | } |
326 | if (defined($objs)) { | |
dcc60243 SR |
327 | foreach my $obj (split /\s+/,$objs) { |
328 | $obj =~ s/-/_/g; | |
329 | if ($obj =~ /(.*)\.o$/) { | |
1d1d1fea | 330 | # Objects may be enabled by more than one config. |
dcc60243 SR |
331 | # Store configs in an array. |
332 | my @arr; | |
333 | ||
334 | if (defined($objects{$1})) { | |
335 | @arr = @{$objects{$1}}; | |
336 | } | |
337 | ||
338 | $arr[$#arr+1] = $var; | |
339 | ||
340 | # The objects have a hash mapping to a reference | |
341 | # of an array of configs. | |
342 | $objects{$1} = \@arr; | |
343 | } | |
344 | } | |
345 | } | |
346 | } | |
e0d28694 | 347 | close($infile); |
dcc60243 SR |
348 | } |
349 | ||
350 | my %modules; | |
e0d28694 | 351 | my $linfile; |
dcc60243 | 352 | |
615f0833 SR |
353 | if (defined($lsmod_file)) { |
354 | if ( ! -f $lsmod_file) { | |
f597a718 AL |
355 | if ( -f $ENV{'objtree'}."/".$lsmod_file) { |
356 | $lsmod_file = $ENV{'objtree'}."/".$lsmod_file; | |
357 | } else { | |
358 | die "$lsmod_file not found"; | |
359 | } | |
615f0833 | 360 | } |
e0d28694 BP |
361 | |
362 | my $otype = ( -x $lsmod_file) ? '-|' : '<'; | |
363 | open($linfile, $otype, $lsmod_file); | |
364 | ||
615f0833 SR |
365 | } else { |
366 | ||
367 | # see what modules are loaded on this system | |
368 | my $lsmod; | |
369 | ||
cf5a189d | 370 | foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) { |
615f0833 SR |
371 | if ( -x "$dir/lsmod" ) { |
372 | $lsmod = "$dir/lsmod"; | |
373 | last; | |
374 | } | |
68f0d627 | 375 | } |
615f0833 SR |
376 | if (!defined($lsmod)) { |
377 | # try just the path | |
378 | $lsmod = "lsmod"; | |
379 | } | |
380 | ||
e0d28694 | 381 | open($linfile, '-|', $lsmod) || die "Can not call lsmod with $lsmod"; |
88f66ea9 SR |
382 | } |
383 | ||
e0d28694 | 384 | while (<$linfile>) { |
dcc60243 SR |
385 | next if (/^Module/); # Skip the first line. |
386 | if (/^(\S+)/) { | |
387 | $modules{$1} = 1; | |
388 | } | |
389 | } | |
e0d28694 | 390 | close ($linfile); |
dcc60243 SR |
391 | |
392 | # add to the configs hash all configs that are needed to enable | |
0b58a99e SR |
393 | # a loaded module. This is a direct obj-${CONFIG_FOO} += bar.o |
394 | # where we know we need bar.o so we add FOO to the list. | |
dcc60243 SR |
395 | my %configs; |
396 | foreach my $module (keys(%modules)) { | |
397 | if (defined($objects{$module})) { | |
e5199edb | 398 | my @arr = @{$objects{$module}}; |
dcc60243 SR |
399 | foreach my $conf (@arr) { |
400 | $configs{$conf} = $module; | |
4503379c | 401 | dprint "$conf added by direct ($module)\n"; |
bc20d12e SR |
402 | if ($debugprint) { |
403 | my $c=$conf; | |
404 | $c =~ s/^CONFIG_//; | |
405 | if (defined($depends{$c})) { | |
406 | dprint " deps = $depends{$c}\n"; | |
407 | } else { | |
408 | dprint " no deps\n"; | |
409 | } | |
410 | } | |
dcc60243 SR |
411 | } |
412 | } else { | |
413 | # Most likely, someone has a custom (binary?) module loaded. | |
414 | print STDERR "$module config not found!!\n"; | |
415 | } | |
416 | } | |
417 | ||
4f4c51c9 SR |
418 | # Read the current config, and see what is enabled. We want to |
419 | # ignore configs that we would not enable anyway. | |
420 | ||
421 | my %orig_configs; | |
dcc60243 | 422 | my $valid = "A-Za-z_0-9"; |
4f4c51c9 SR |
423 | |
424 | foreach my $line (@config_file) { | |
425 | $_ = $line; | |
426 | ||
427 | if (/(CONFIG_[$valid]*)=(m|y)/) { | |
428 | $orig_configs{$1} = $2; | |
429 | } | |
430 | } | |
431 | ||
dcc60243 SR |
432 | my $repeat = 1; |
433 | ||
4503379c SR |
434 | my $depconfig; |
435 | ||
dcc60243 SR |
436 | # |
437 | # Note, we do not care about operands (like: &&, ||, !) we want to add any | |
438 | # config that is in the depend list of another config. This script does | |
439 | # not enable configs that are not already enabled. If we come across a | |
440 | # config A that depends on !B, we can still add B to the list of depends | |
441 | # to keep on. If A was on in the original config, B would not have been | |
442 | # and B would not be turned on by this script. | |
443 | # | |
d4bb58b5 | 444 | sub parse_config_depends |
dcc60243 SR |
445 | { |
446 | my ($p) = @_; | |
447 | ||
448 | while ($p =~ /[$valid]/) { | |
449 | ||
450 | if ($p =~ /^[^$valid]*([$valid]+)/) { | |
451 | my $conf = "CONFIG_" . $1; | |
452 | ||
453 | $p =~ s/^[^$valid]*[$valid]+//; | |
454 | ||
4f4c51c9 | 455 | # We only need to process if the depend config is a module |
5169192b | 456 | if (!defined($orig_configs{$conf}) || $orig_configs{$conf} eq "y") { |
4f4c51c9 SR |
457 | next; |
458 | } | |
459 | ||
dcc60243 SR |
460 | if (!defined($configs{$conf})) { |
461 | # We must make sure that this config has its | |
462 | # dependencies met. | |
463 | $repeat = 1; # do again | |
4503379c | 464 | dprint "$conf selected by depend $depconfig\n"; |
dcc60243 SR |
465 | $configs{$conf} = 1; |
466 | } | |
467 | } else { | |
468 | die "this should never happen"; | |
469 | } | |
470 | } | |
471 | } | |
472 | ||
d4bb58b5 SR |
473 | # Select is treated a bit differently than depends. We call this |
474 | # when a config has no prompt and requires another config to be | |
475 | # selected. We use to just select all configs that selected this | |
476 | # config, but found that that can balloon into enabling hundreds | |
477 | # of configs that we do not care about. | |
478 | # | |
479 | # The idea is we look at all the configs that select it. If one | |
480 | # is already in our list of configs to enable, then there's nothing | |
481 | # else to do. If there isn't, we pick the first config that was | |
482 | # enabled in the orignal config and use that. | |
483 | sub parse_config_selects | |
484 | { | |
485 | my ($config, $p) = @_; | |
dcc60243 | 486 | |
d4bb58b5 SR |
487 | my $next_config; |
488 | ||
489 | while ($p =~ /[$valid]/) { | |
490 | ||
491 | if ($p =~ /^[^$valid]*([$valid]+)/) { | |
492 | my $conf = "CONFIG_" . $1; | |
493 | ||
494 | $p =~ s/^[^$valid]*[$valid]+//; | |
dcc60243 | 495 | |
d4bb58b5 SR |
496 | # Make sure that this config exists in the current .config file |
497 | if (!defined($orig_configs{$conf})) { | |
4503379c | 498 | dprint "$conf not set for $config select\n"; |
d4bb58b5 SR |
499 | next; |
500 | } | |
501 | ||
502 | # Check if something other than a module selects this config | |
503 | if (defined($orig_configs{$conf}) && $orig_configs{$conf} ne "m") { | |
4503379c | 504 | dprint "$conf (non module) selects config, we are good\n"; |
d4bb58b5 SR |
505 | # we are good with this |
506 | return; | |
507 | } | |
508 | if (defined($configs{$conf})) { | |
4503379c | 509 | dprint "$conf selects $config so we are good\n"; |
d4bb58b5 SR |
510 | # A set config selects this config, we are good |
511 | return; | |
512 | } | |
513 | # Set this config to be selected | |
514 | if (!defined($next_config)) { | |
515 | $next_config = $conf; | |
516 | } | |
517 | } else { | |
518 | die "this should never happen"; | |
dcc60243 | 519 | } |
d4bb58b5 | 520 | } |
dcc60243 | 521 | |
d4bb58b5 SR |
522 | # If no possible config selected this, then something happened. |
523 | if (!defined($next_config)) { | |
524 | print STDERR "WARNING: $config is required, but nothing in the\n"; | |
525 | print STDERR " current config selects it.\n"; | |
526 | return; | |
527 | } | |
528 | ||
529 | # If we are here, then we found no config that is set and | |
530 | # selects this config. Repeat. | |
531 | $repeat = 1; | |
532 | # Make this config need to be selected | |
533 | $configs{$next_config} = 1; | |
4503379c | 534 | dprint "$next_config selected by select $config\n"; |
d4bb58b5 SR |
535 | } |
536 | ||
537 | my %process_selects; | |
538 | ||
539 | # loop through all configs, select their dependencies. | |
540 | sub loop_depend { | |
541 | $repeat = 1; | |
542 | ||
543 | while ($repeat) { | |
544 | $repeat = 0; | |
545 | ||
546 | forloop: | |
547 | foreach my $config (keys %configs) { | |
548 | ||
549 | # If this config is not a module, we do not need to process it | |
550 | if (defined($orig_configs{$config}) && $orig_configs{$config} ne "m") { | |
551 | next forloop; | |
552 | } | |
553 | ||
554 | $config =~ s/^CONFIG_//; | |
4503379c | 555 | $depconfig = $config; |
d4bb58b5 SR |
556 | |
557 | if (defined($depends{$config})) { | |
558 | # This config has dependencies. Make sure they are also included | |
559 | parse_config_depends $depends{$config}; | |
560 | } | |
561 | ||
562 | # If the config has no prompt, then we need to check if a config | |
563 | # that is enabled selected it. Or if we need to enable one. | |
564 | if (!defined($prompts{$config}) && defined($selects{$config})) { | |
565 | $process_selects{$config} = 1; | |
566 | } | |
dcc60243 | 567 | } |
d4bb58b5 SR |
568 | } |
569 | } | |
570 | ||
571 | sub loop_select { | |
572 | ||
573 | foreach my $config (keys %process_selects) { | |
574 | $config =~ s/^CONFIG_//; | |
dcc60243 | 575 | |
4503379c SR |
576 | dprint "Process select $config\n"; |
577 | ||
dcc60243 | 578 | # config has no prompt and must be selected. |
d4bb58b5 | 579 | parse_config_selects $config, $selects{$config}; |
dcc60243 SR |
580 | } |
581 | } | |
582 | ||
d4bb58b5 SR |
583 | while ($repeat) { |
584 | # Get the first set of configs and their dependencies. | |
585 | loop_depend; | |
586 | ||
587 | $repeat = 0; | |
588 | ||
589 | # Now we need to see if we have to check selects; | |
590 | loop_select; | |
38385f8f | 591 | } |
d4bb58b5 | 592 | |
dcc60243 SR |
593 | my %setconfigs; |
594 | ||
595 | # Finally, read the .config file and turn off any module enabled that | |
596 | # we could not find a reason to keep enabled. | |
4f4c51c9 SR |
597 | foreach my $line (@config_file) { |
598 | $_ = $line; | |
744ffcbe SR |
599 | |
600 | if (/CONFIG_IKCONFIG/) { | |
601 | if (/# CONFIG_IKCONFIG is not set/) { | |
602 | # enable IKCONFIG at least as a module | |
603 | print "CONFIG_IKCONFIG=m\n"; | |
604 | # don't ask about PROC | |
d08ca277 | 605 | print "# CONFIG_IKCONFIG_PROC is not set\n"; |
744ffcbe SR |
606 | } else { |
607 | print; | |
608 | } | |
609 | next; | |
610 | } | |
611 | ||
96bab35d BP |
612 | if (/CONFIG_MODULE_SIG_KEY="(.+)"/) { |
613 | my $orig_cert = $1; | |
614 | my $default_cert = "certs/signing_key.pem"; | |
615 | ||
616 | # Check that the logic in this script still matches the one in Kconfig | |
617 | if (!defined($depends{"MODULE_SIG_KEY"}) || | |
618 | $depends{"MODULE_SIG_KEY"} !~ /"\Q$default_cert\E"/) { | |
619 | print STDERR "WARNING: MODULE_SIG_KEY assertion failure, ", | |
620 | "update needed to ", __FILE__, " line ", __LINE__, "\n"; | |
621 | print; | |
622 | } elsif ($orig_cert ne $default_cert && ! -f $orig_cert) { | |
623 | print STDERR "Module signature verification enabled but ", | |
624 | "module signing key \"$orig_cert\" not found. Resetting ", | |
625 | "signing key to default value.\n"; | |
626 | print "CONFIG_MODULE_SIG_KEY=\"$default_cert\"\n"; | |
627 | } else { | |
628 | print; | |
629 | } | |
630 | next; | |
631 | } | |
632 | ||
633 | if (/CONFIG_SYSTEM_TRUSTED_KEYS="(.+)"/) { | |
634 | my $orig_keys = $1; | |
635 | ||
636 | if (! -f $orig_keys) { | |
637 | print STDERR "System keyring enabled but keys \"$orig_keys\" ", | |
638 | "not found. Resetting keys to default value.\n"; | |
639 | print "CONFIG_SYSTEM_TRUSTED_KEYS=\"\"\n"; | |
640 | } else { | |
641 | print; | |
642 | } | |
643 | next; | |
644 | } | |
645 | ||
744ffcbe SR |
646 | if (/^(CONFIG.*)=(m|y)/) { |
647 | if (defined($configs{$1})) { | |
22d550ae AL |
648 | if ($localyesconfig) { |
649 | $setconfigs{$1} = 'y'; | |
4eae518d YA |
650 | print "$1=y\n"; |
651 | next; | |
22d550ae AL |
652 | } else { |
653 | $setconfigs{$1} = $2; | |
654 | } | |
744ffcbe SR |
655 | } elsif ($2 eq "m") { |
656 | print "# $1 is not set\n"; | |
d08ca277 | 657 | next; |
dcc60243 | 658 | } |
744ffcbe | 659 | } |
d08ca277 | 660 | print; |
dcc60243 | 661 | } |
dcc60243 SR |
662 | |
663 | # Integrity check, make sure all modules that we want enabled do | |
664 | # indeed have their configs set. | |
665 | loop: | |
666 | foreach my $module (keys(%modules)) { | |
667 | if (defined($objects{$module})) { | |
668 | my @arr = @{$objects{$module}}; | |
669 | foreach my $conf (@arr) { | |
670 | if (defined($setconfigs{$conf})) { | |
671 | next loop; | |
672 | } | |
673 | } | |
674 | print STDERR "module $module did not have configs"; | |
675 | foreach my $conf (@arr) { | |
676 | print STDERR " " , $conf; | |
677 | } | |
678 | print STDERR "\n"; | |
679 | } | |
680 | } |