tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 */
5
6#include <ctype.h>
7#include <limits.h>
8#include <stdio.h>
9#include <stdlib.h>
10#include <string.h>
11#include <time.h>
12#include <unistd.h>
13#include <getopt.h>
14#include <sys/time.h>
15#include <errno.h>
16
17#include "lkc.h"
18
19static void conf(struct menu *menu);
20static void check_conf(struct menu *menu);
21
22enum input_mode {
23 oldaskconfig,
24 syncconfig,
25 oldconfig,
26 allnoconfig,
27 allyesconfig,
28 allmodconfig,
29 alldefconfig,
30 randconfig,
31 defconfig,
32 savedefconfig,
33 listnewconfig,
34 helpnewconfig,
35 olddefconfig,
36 yes2modconfig,
37 mod2yesconfig,
38};
39static enum input_mode input_mode = oldaskconfig;
40
41static int indent = 1;
42static int tty_stdio;
43static int sync_kconfig;
44static int conf_cnt;
45static char line[PATH_MAX];
46static struct menu *rootEntry;
47
48static void print_help(struct menu *menu)
49{
50 struct gstr help = str_new();
51
52 menu_get_ext_help(menu, &help);
53
54 printf("\n%s\n", str_get(&help));
55 str_free(&help);
56}
57
58static void strip(char *str)
59{
60 char *p = str;
61 int l;
62
63 while ((isspace(*p)))
64 p++;
65 l = strlen(p);
66 if (p != str)
67 memmove(str, p, l + 1);
68 if (!l)
69 return;
70 p = str + l - 1;
71 while ((isspace(*p)))
72 *p-- = 0;
73}
74
75/* Helper function to facilitate fgets() by Jean Sacren. */
76static void xfgets(char *str, int size, FILE *in)
77{
78 if (!fgets(str, size, in))
79 fprintf(stderr, "\nError in reading or end of file.\n");
80
81 if (!tty_stdio)
82 printf("%s", str);
83}
84
85static int conf_askvalue(struct symbol *sym, const char *def)
86{
87 if (!sym_has_value(sym))
88 printf("(NEW) ");
89
90 line[0] = '\n';
91 line[1] = 0;
92
93 if (!sym_is_changeable(sym)) {
94 printf("%s\n", def);
95 line[0] = '\n';
96 line[1] = 0;
97 return 0;
98 }
99
100 switch (input_mode) {
101 case oldconfig:
102 case syncconfig:
103 if (sym_has_value(sym)) {
104 printf("%s\n", def);
105 return 0;
106 }
107 /* fall through */
108 default:
109 fflush(stdout);
110 xfgets(line, sizeof(line), stdin);
111 break;
112 }
113
114 return 1;
115}
116
117static int conf_string(struct menu *menu)
118{
119 struct symbol *sym = menu->sym;
120 const char *def;
121
122 while (1) {
123 printf("%*s%s ", indent - 1, "", menu->prompt->text);
124 printf("(%s) ", sym->name);
125 def = sym_get_string_value(sym);
126 if (def)
127 printf("[%s] ", def);
128 if (!conf_askvalue(sym, def))
129 return 0;
130 switch (line[0]) {
131 case '\n':
132 break;
133 case '?':
134 /* print help */
135 if (line[1] == '\n') {
136 print_help(menu);
137 def = NULL;
138 break;
139 }
140 /* fall through */
141 default:
142 line[strlen(line)-1] = 0;
143 def = line;
144 }
145 if (def && sym_set_string_value(sym, def))
146 return 0;
147 }
148}
149
150static int conf_sym(struct menu *menu)
151{
152 struct symbol *sym = menu->sym;
153 tristate oldval, newval;
154
155 while (1) {
156 printf("%*s%s ", indent - 1, "", menu->prompt->text);
157 if (sym->name)
158 printf("(%s) ", sym->name);
159 putchar('[');
160 oldval = sym_get_tristate_value(sym);
161 switch (oldval) {
162 case no:
163 putchar('N');
164 break;
165 case mod:
166 putchar('M');
167 break;
168 case yes:
169 putchar('Y');
170 break;
171 }
172 if (oldval != no && sym_tristate_within_range(sym, no))
173 printf("/n");
174 if (oldval != mod && sym_tristate_within_range(sym, mod))
175 printf("/m");
176 if (oldval != yes && sym_tristate_within_range(sym, yes))
177 printf("/y");
178 printf("/?] ");
179 if (!conf_askvalue(sym, sym_get_string_value(sym)))
180 return 0;
181 strip(line);
182
183 switch (line[0]) {
184 case 'n':
185 case 'N':
186 newval = no;
187 if (!line[1] || !strcmp(&line[1], "o"))
188 break;
189 continue;
190 case 'm':
191 case 'M':
192 newval = mod;
193 if (!line[1])
194 break;
195 continue;
196 case 'y':
197 case 'Y':
198 newval = yes;
199 if (!line[1] || !strcmp(&line[1], "es"))
200 break;
201 continue;
202 case 0:
203 newval = oldval;
204 break;
205 case '?':
206 goto help;
207 default:
208 continue;
209 }
210 if (sym_set_tristate_value(sym, newval))
211 return 0;
212help:
213 print_help(menu);
214 }
215}
216
217static int conf_choice(struct menu *menu)
218{
219 struct symbol *sym, *def_sym;
220 struct menu *child;
221 bool is_new;
222
223 sym = menu->sym;
224 is_new = !sym_has_value(sym);
225 if (sym_is_changeable(sym)) {
226 conf_sym(menu);
227 sym_calc_value(sym);
228 switch (sym_get_tristate_value(sym)) {
229 case no:
230 return 1;
231 case mod:
232 return 0;
233 case yes:
234 break;
235 }
236 } else {
237 switch (sym_get_tristate_value(sym)) {
238 case no:
239 return 1;
240 case mod:
241 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
242 return 0;
243 case yes:
244 break;
245 }
246 }
247
248 while (1) {
249 int cnt, def;
250
251 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
252 def_sym = sym_get_choice_value(sym);
253 cnt = def = 0;
254 line[0] = 0;
255 for (child = menu->list; child; child = child->next) {
256 if (!menu_is_visible(child))
257 continue;
258 if (!child->sym) {
259 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
260 continue;
261 }
262 cnt++;
263 if (child->sym == def_sym) {
264 def = cnt;
265 printf("%*c", indent, '>');
266 } else
267 printf("%*c", indent, ' ');
268 printf(" %d. %s", cnt, menu_get_prompt(child));
269 if (child->sym->name)
270 printf(" (%s)", child->sym->name);
271 if (!sym_has_value(child->sym))
272 printf(" (NEW)");
273 printf("\n");
274 }
275 printf("%*schoice", indent - 1, "");
276 if (cnt == 1) {
277 printf("[1]: 1\n");
278 goto conf_childs;
279 }
280 printf("[1-%d?]: ", cnt);
281 switch (input_mode) {
282 case oldconfig:
283 case syncconfig:
284 if (!is_new) {
285 cnt = def;
286 printf("%d\n", cnt);
287 break;
288 }
289 /* fall through */
290 case oldaskconfig:
291 fflush(stdout);
292 xfgets(line, sizeof(line), stdin);
293 strip(line);
294 if (line[0] == '?') {
295 print_help(menu);
296 continue;
297 }
298 if (!line[0])
299 cnt = def;
300 else if (isdigit(line[0]))
301 cnt = atoi(line);
302 else
303 continue;
304 break;
305 default:
306 break;
307 }
308
309 conf_childs:
310 for (child = menu->list; child; child = child->next) {
311 if (!child->sym || !menu_is_visible(child))
312 continue;
313 if (!--cnt)
314 break;
315 }
316 if (!child)
317 continue;
318 if (line[0] && line[strlen(line) - 1] == '?') {
319 print_help(child);
320 continue;
321 }
322 sym_set_choice_value(sym, child->sym);
323 for (child = child->list; child; child = child->next) {
324 indent += 2;
325 conf(child);
326 indent -= 2;
327 }
328 return 1;
329 }
330}
331
332static void conf(struct menu *menu)
333{
334 struct symbol *sym;
335 struct property *prop;
336 struct menu *child;
337
338 if (!menu_is_visible(menu))
339 return;
340
341 sym = menu->sym;
342 prop = menu->prompt;
343 if (prop) {
344 const char *prompt;
345
346 switch (prop->type) {
347 case P_MENU:
348 /*
349 * Except in oldaskconfig mode, we show only menus that
350 * contain new symbols.
351 */
352 if (input_mode != oldaskconfig && rootEntry != menu) {
353 check_conf(menu);
354 return;
355 }
356 /* fall through */
357 case P_COMMENT:
358 prompt = menu_get_prompt(menu);
359 if (prompt)
360 printf("%*c\n%*c %s\n%*c\n",
361 indent, '*',
362 indent, '*', prompt,
363 indent, '*');
364 default:
365 ;
366 }
367 }
368
369 if (!sym)
370 goto conf_childs;
371
372 if (sym_is_choice(sym)) {
373 conf_choice(menu);
374 if (sym->curr.tri != mod)
375 return;
376 goto conf_childs;
377 }
378
379 switch (sym->type) {
380 case S_INT:
381 case S_HEX:
382 case S_STRING:
383 conf_string(menu);
384 break;
385 default:
386 conf_sym(menu);
387 break;
388 }
389
390conf_childs:
391 if (sym)
392 indent += 2;
393 for (child = menu->list; child; child = child->next)
394 conf(child);
395 if (sym)
396 indent -= 2;
397}
398
399static void check_conf(struct menu *menu)
400{
401 struct symbol *sym;
402 struct menu *child;
403
404 if (!menu_is_visible(menu))
405 return;
406
407 sym = menu->sym;
408 if (sym && !sym_has_value(sym) &&
409 (sym_is_changeable(sym) ||
410 (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes))) {
411
412 switch (input_mode) {
413 case listnewconfig:
414 if (sym->name) {
415 const char *str;
416
417 if (sym->type == S_STRING) {
418 str = sym_get_string_value(sym);
419 str = sym_escape_string_value(str);
420 printf("%s%s=%s\n", CONFIG_, sym->name, str);
421 free((void *)str);
422 } else {
423 str = sym_get_string_value(sym);
424 printf("%s%s=%s\n", CONFIG_, sym->name, str);
425 }
426 }
427 break;
428 case helpnewconfig:
429 printf("-----\n");
430 print_help(menu);
431 printf("-----\n");
432 break;
433 default:
434 if (!conf_cnt++)
435 printf("*\n* Restart config...\n*\n");
436 rootEntry = menu_get_parent_menu(menu);
437 conf(rootEntry);
438 break;
439 }
440 }
441
442 for (child = menu->list; child; child = child->next)
443 check_conf(child);
444}
445
446static struct option long_opts[] = {
447 {"oldaskconfig", no_argument, NULL, oldaskconfig},
448 {"oldconfig", no_argument, NULL, oldconfig},
449 {"syncconfig", no_argument, NULL, syncconfig},
450 {"defconfig", required_argument, NULL, defconfig},
451 {"savedefconfig", required_argument, NULL, savedefconfig},
452 {"allnoconfig", no_argument, NULL, allnoconfig},
453 {"allyesconfig", no_argument, NULL, allyesconfig},
454 {"allmodconfig", no_argument, NULL, allmodconfig},
455 {"alldefconfig", no_argument, NULL, alldefconfig},
456 {"randconfig", no_argument, NULL, randconfig},
457 {"listnewconfig", no_argument, NULL, listnewconfig},
458 {"helpnewconfig", no_argument, NULL, helpnewconfig},
459 {"olddefconfig", no_argument, NULL, olddefconfig},
460 {"yes2modconfig", no_argument, NULL, yes2modconfig},
461 {"mod2yesconfig", no_argument, NULL, mod2yesconfig},
462 {NULL, 0, NULL, 0}
463};
464
465static void conf_usage(const char *progname)
466{
467
468 printf("Usage: %s [-s] [option] <kconfig-file>\n", progname);
469 printf("[option] is _one_ of the following:\n");
470 printf(" --listnewconfig List new options\n");
471 printf(" --helpnewconfig List new options and help text\n");
472 printf(" --oldaskconfig Start a new configuration using a line-oriented program\n");
473 printf(" --oldconfig Update a configuration using a provided .config as base\n");
474 printf(" --syncconfig Similar to oldconfig but generates configuration in\n"
475 " include/{generated/,config/}\n");
476 printf(" --olddefconfig Same as oldconfig but sets new symbols to their default value\n");
477 printf(" --defconfig <file> New config with default defined in <file>\n");
478 printf(" --savedefconfig <file> Save the minimal current configuration to <file>\n");
479 printf(" --allnoconfig New config where all options are answered with no\n");
480 printf(" --allyesconfig New config where all options are answered with yes\n");
481 printf(" --allmodconfig New config where all options are answered with mod\n");
482 printf(" --alldefconfig New config with all symbols set to default\n");
483 printf(" --randconfig New config with random answer to all options\n");
484 printf(" --yes2modconfig Change answers from yes to mod if possible\n");
485 printf(" --mod2yesconfig Change answers from mod to yes if possible\n");
486 printf(" (If none of the above is given, --oldaskconfig is the default)\n");
487}
488
489int main(int ac, char **av)
490{
491 const char *progname = av[0];
492 int opt;
493 const char *name, *defconfig_file = NULL /* gcc uninit */;
494 int no_conf_write = 0;
495
496 tty_stdio = isatty(0) && isatty(1);
497
498 while ((opt = getopt_long(ac, av, "hs", long_opts, NULL)) != -1) {
499 if (opt == 's') {
500 conf_set_message_callback(NULL);
501 continue;
502 }
503 input_mode = (enum input_mode)opt;
504 switch (opt) {
505 case syncconfig:
506 /*
507 * syncconfig is invoked during the build stage.
508 * Suppress distracting "configuration written to ..."
509 */
510 conf_set_message_callback(NULL);
511 sync_kconfig = 1;
512 break;
513 case defconfig:
514 case savedefconfig:
515 defconfig_file = optarg;
516 break;
517 case randconfig:
518 {
519 struct timeval now;
520 unsigned int seed;
521 char *seed_env;
522
523 /*
524 * Use microseconds derived seed,
525 * compensate for systems where it may be zero
526 */
527 gettimeofday(&now, NULL);
528 seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 1));
529
530 seed_env = getenv("KCONFIG_SEED");
531 if( seed_env && *seed_env ) {
532 char *endp;
533 int tmp = (int)strtol(seed_env, &endp, 0);
534 if (*endp == '\0') {
535 seed = tmp;
536 }
537 }
538 fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
539 srand(seed);
540 break;
541 }
542 case oldaskconfig:
543 case oldconfig:
544 case allnoconfig:
545 case allyesconfig:
546 case allmodconfig:
547 case alldefconfig:
548 case listnewconfig:
549 case helpnewconfig:
550 case olddefconfig:
551 case yes2modconfig:
552 case mod2yesconfig:
553 break;
554 case 'h':
555 conf_usage(progname);
556 exit(1);
557 break;
558 }
559 }
560 if (ac == optind) {
561 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
562 conf_usage(progname);
563 exit(1);
564 }
565 name = av[optind];
566 conf_parse(name);
567 //zconfdump(stdout);
568
569 switch (input_mode) {
570 case defconfig:
571 if (conf_read(defconfig_file)) {
572 fprintf(stderr,
573 "***\n"
574 "*** Can't find default configuration \"%s\"!\n"
575 "***\n",
576 defconfig_file);
577 exit(1);
578 }
579 break;
580 case savedefconfig:
581 case syncconfig:
582 case oldaskconfig:
583 case oldconfig:
584 case listnewconfig:
585 case helpnewconfig:
586 case olddefconfig:
587 case yes2modconfig:
588 case mod2yesconfig:
589 conf_read(NULL);
590 break;
591 case allnoconfig:
592 case allyesconfig:
593 case allmodconfig:
594 case alldefconfig:
595 case randconfig:
596 name = getenv("KCONFIG_ALLCONFIG");
597 if (!name)
598 break;
599 if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
600 if (conf_read_simple(name, S_DEF_USER)) {
601 fprintf(stderr,
602 "*** Can't read seed configuration \"%s\"!\n",
603 name);
604 exit(1);
605 }
606 break;
607 }
608 switch (input_mode) {
609 case allnoconfig: name = "allno.config"; break;
610 case allyesconfig: name = "allyes.config"; break;
611 case allmodconfig: name = "allmod.config"; break;
612 case alldefconfig: name = "alldef.config"; break;
613 case randconfig: name = "allrandom.config"; break;
614 default: break;
615 }
616 if (conf_read_simple(name, S_DEF_USER) &&
617 conf_read_simple("all.config", S_DEF_USER)) {
618 fprintf(stderr,
619 "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n",
620 name);
621 exit(1);
622 }
623 break;
624 default:
625 break;
626 }
627
628 if (sync_kconfig) {
629 name = getenv("KCONFIG_NOSILENTUPDATE");
630 if (name && *name) {
631 if (conf_get_changed()) {
632 fprintf(stderr,
633 "\n*** The configuration requires explicit update.\n\n");
634 return 1;
635 }
636 no_conf_write = 1;
637 }
638 }
639
640 switch (input_mode) {
641 case allnoconfig:
642 conf_set_all_new_symbols(def_no);
643 break;
644 case allyesconfig:
645 conf_set_all_new_symbols(def_yes);
646 break;
647 case allmodconfig:
648 conf_set_all_new_symbols(def_mod);
649 break;
650 case alldefconfig:
651 conf_set_all_new_symbols(def_default);
652 break;
653 case randconfig:
654 /* Really nothing to do in this loop */
655 while (conf_set_all_new_symbols(def_random)) ;
656 break;
657 case defconfig:
658 conf_set_all_new_symbols(def_default);
659 break;
660 case savedefconfig:
661 break;
662 case yes2modconfig:
663 conf_rewrite_mod_or_yes(def_y2m);
664 break;
665 case mod2yesconfig:
666 conf_rewrite_mod_or_yes(def_m2y);
667 break;
668 case oldaskconfig:
669 rootEntry = &rootmenu;
670 conf(&rootmenu);
671 input_mode = oldconfig;
672 /* fall through */
673 case oldconfig:
674 case listnewconfig:
675 case helpnewconfig:
676 case syncconfig:
677 /* Update until a loop caused no more changes */
678 do {
679 conf_cnt = 0;
680 check_conf(&rootmenu);
681 } while (conf_cnt);
682 break;
683 case olddefconfig:
684 default:
685 break;
686 }
687
688 if (input_mode == savedefconfig) {
689 if (conf_write_defconfig(defconfig_file)) {
690 fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
691 defconfig_file);
692 return 1;
693 }
694 } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
695 if (!no_conf_write && conf_write(NULL)) {
696 fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
697 exit(1);
698 }
699
700 /*
701 * Create auto.conf if it does not exist.
702 * This prevents GNU Make 4.1 or older from emitting
703 * "include/config/auto.conf: No such file or directory"
704 * in the top-level Makefile
705 *
706 * syncconfig always creates or updates auto.conf because it is
707 * used during the build.
708 */
709 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
710 fprintf(stderr,
711 "\n*** Error during sync of the configuration.\n\n");
712 return 1;
713 }
714 }
715 return 0;
716}