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