source: MondoRescue/branches/2.2.8.selinux/mindi-busybox/scripts/kconfig/zconf.y@ 2546

Last change on this file since 2546 was 1765, checked in by Bruno Cornec, 18 years ago

Update to busybox 1.7.2
File size: 13.9 KB
Line 
1%{
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 * Released under the terms of the GNU GPL v2.0.
5 */
6
7#include <ctype.h>
8#include <stdarg.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include <stdbool.h>
13
14#define LKC_DIRECT_LINK
15#include "lkc.h"
16
17#include "zconf.hash.c"
18
19#define printd(mask, fmt...) if (cdebug & (mask)) printf(fmt)
20
21#define PRINTD 0x0001
22#define DEBUG_PARSE 0x0002
23
24int cdebug = PRINTD;
25
26extern int zconflex(void);
27static void zconfprint(const char *err, ...);
28static void zconf_error(const char *err, ...);
29static void zconferror(const char *err);
30static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken);
31
32struct symbol *symbol_hash[257];
33
34static struct menu *current_menu, *current_entry;
35
36#define YYDEBUG 0
37#if YYDEBUG
38#define YYERROR_VERBOSE
39#endif
40%}
41%expect 26
42
43%union
44{
45 char *string;
46 struct file *file;
47 struct symbol *symbol;
48 struct expr *expr;
49 struct menu *menu;
50 struct kconf_id *id;
51}
52
53%token <id>T_MAINMENU
54%token <id>T_MENU
55%token <id>T_ENDMENU
56%token <id>T_SOURCE
57%token <id>T_CHOICE
58%token <id>T_ENDCHOICE
59%token <id>T_COMMENT
60%token <id>T_CONFIG
61%token <id>T_MENUCONFIG
62%token <id>T_HELP
63%token <string> T_HELPTEXT
64%token <id>T_IF
65%token <id>T_ENDIF
66%token <id>T_DEPENDS
67%token <id>T_REQUIRES
68%token <id>T_OPTIONAL
69%token <id>T_PROMPT
70%token <id>T_TYPE
71%token <id>T_DEFAULT
72%token <id>T_SELECT
73%token <id>T_RANGE
74%token <id>T_ON
75%token <string> T_WORD
76%token <string> T_WORD_QUOTE
77%token T_UNEQUAL
78%token T_CLOSE_PAREN
79%token T_OPEN_PAREN
80%token T_EOL
81
82%left T_OR
83%left T_AND
84%left T_EQUAL T_UNEQUAL
85%nonassoc T_NOT
86
87%type <string> prompt
88%type <symbol> symbol
89%type <expr> expr
90%type <expr> if_expr
91%type <id> end
92%type <id> option_name
93%type <menu> if_entry menu_entry choice_entry
94
95%destructor {
96 fprintf(stderr, "%s:%d: missing end statement for this entry\n",
97 $$->file->name, $$->lineno);
98 if (current_menu == $$)
99 menu_end_menu();
100} if_entry menu_entry choice_entry
101
102%%
103input: stmt_list;
104
105stmt_list:
106 /* empty */
107 | stmt_list common_stmt
108 | stmt_list choice_stmt
109 | stmt_list menu_stmt
110 | stmt_list T_MAINMENU prompt nl
111 | stmt_list end { zconf_error("unexpected end statement"); }
112 | stmt_list T_WORD error T_EOL { zconf_error("unknown statement \"%s\"", $2); }
113 | stmt_list option_name error T_EOL
114{
115 zconf_error("unexpected option \"%s\"", kconf_id_strings + $2->name);
116}
117 | stmt_list error T_EOL { zconf_error("invalid statement"); }
118;
119
120option_name:
121 T_DEPENDS | T_PROMPT | T_TYPE | T_SELECT | T_OPTIONAL | T_RANGE | T_DEFAULT
122;
123
124common_stmt:
125 T_EOL
126 | if_stmt
127 | comment_stmt
128 | config_stmt
129 | menuconfig_stmt
130 | source_stmt
131;
132
133option_error:
134 T_WORD error T_EOL { zconf_error("unknown option \"%s\"", $1); }
135 | error T_EOL { zconf_error("invalid option"); }
136;
137
138
139/* config/menuconfig entry */
140
141config_entry_start: T_CONFIG T_WORD T_EOL
142{
143 struct symbol *sym = sym_lookup($2, 0);
144 sym->flags |= SYMBOL_OPTIONAL;
145 menu_add_entry(sym);
146 printd(DEBUG_PARSE, "%s:%d:config %s\n", zconf_curname(), zconf_lineno(), $2);
147};
148
149config_stmt: config_entry_start config_option_list
150{
151 menu_end_entry();
152 printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
153};
154
155menuconfig_entry_start: T_MENUCONFIG T_WORD T_EOL
156{
157 struct symbol *sym = sym_lookup($2, 0);
158 sym->flags |= SYMBOL_OPTIONAL;
159 menu_add_entry(sym);
160 printd(DEBUG_PARSE, "%s:%d:menuconfig %s\n", zconf_curname(), zconf_lineno(), $2);
161};
162
163menuconfig_stmt: menuconfig_entry_start config_option_list
164{
165 if (current_entry->prompt)
166 current_entry->prompt->type = P_MENU;
167 else
168 zconfprint("warning: menuconfig statement without prompt");
169 menu_end_entry();
170 printd(DEBUG_PARSE, "%s:%d:endconfig\n", zconf_curname(), zconf_lineno());
171};
172
173config_option_list:
174 /* empty */
175 | config_option_list config_option
176 | config_option_list depends
177 | config_option_list help
178 | config_option_list option_error
179 | config_option_list T_EOL
180;
181
182config_option: T_TYPE prompt_stmt_opt T_EOL
183{
184 menu_set_type($1->stype);
185 printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
186 zconf_curname(), zconf_lineno(),
187 $1->stype);
188};
189
190config_option: T_PROMPT prompt if_expr T_EOL
191{
192 menu_add_prompt(P_PROMPT, $2, $3);
193 printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
194};
195
196config_option: T_DEFAULT expr if_expr T_EOL
197{
198 menu_add_expr(P_DEFAULT, $2, $3);
199 if ($1->stype != S_UNKNOWN)
200 menu_set_type($1->stype);
201 printd(DEBUG_PARSE, "%s:%d:default(%u)\n",
202 zconf_curname(), zconf_lineno(),
203 $1->stype);
204};
205
206config_option: T_SELECT T_WORD if_expr T_EOL
207{
208 menu_add_symbol(P_SELECT, sym_lookup($2, 0), $3);
209 printd(DEBUG_PARSE, "%s:%d:select\n", zconf_curname(), zconf_lineno());
210};
211
212config_option: T_RANGE symbol symbol if_expr T_EOL
213{
214 menu_add_expr(P_RANGE, expr_alloc_comp(E_RANGE,$2, $3), $4);
215 printd(DEBUG_PARSE, "%s:%d:range\n", zconf_curname(), zconf_lineno());
216};
217
218/* choice entry */
219
220choice: T_CHOICE T_EOL
221{
222 struct symbol *sym = sym_lookup(NULL, 0);
223 sym->flags |= SYMBOL_CHOICE;
224 menu_add_entry(sym);
225 menu_add_expr(P_CHOICE, NULL, NULL);
226 printd(DEBUG_PARSE, "%s:%d:choice\n", zconf_curname(), zconf_lineno());
227};
228
229choice_entry: choice choice_option_list
230{
231 $$ = menu_add_menu();
232};
233
234choice_end: end
235{
236 if (zconf_endtoken($1, T_CHOICE, T_ENDCHOICE)) {
237 menu_end_menu();
238 printd(DEBUG_PARSE, "%s:%d:endchoice\n", zconf_curname(), zconf_lineno());
239 }
240};
241
242choice_stmt: choice_entry choice_block choice_end
243;
244
245choice_option_list:
246 /* empty */
247 | choice_option_list choice_option
248 | choice_option_list depends
249 | choice_option_list help
250 | choice_option_list T_EOL
251 | choice_option_list option_error
252;
253
254choice_option: T_PROMPT prompt if_expr T_EOL
255{
256 menu_add_prompt(P_PROMPT, $2, $3);
257 printd(DEBUG_PARSE, "%s:%d:prompt\n", zconf_curname(), zconf_lineno());
258};
259
260choice_option: T_TYPE prompt_stmt_opt T_EOL
261{
262 if ($1->stype == S_BOOLEAN || $1->stype == S_TRISTATE) {
263 menu_set_type($1->stype);
264 printd(DEBUG_PARSE, "%s:%d:type(%u)\n",
265 zconf_curname(), zconf_lineno(),
266 $1->stype);
267 } else
268 YYERROR;
269};
270
271choice_option: T_OPTIONAL T_EOL
272{
273 current_entry->sym->flags |= SYMBOL_OPTIONAL;
274 printd(DEBUG_PARSE, "%s:%d:optional\n", zconf_curname(), zconf_lineno());
275};
276
277choice_option: T_DEFAULT T_WORD if_expr T_EOL
278{
279 if ($1->stype == S_UNKNOWN) {
280 menu_add_symbol(P_DEFAULT, sym_lookup($2, 0), $3);
281 printd(DEBUG_PARSE, "%s:%d:default\n",
282 zconf_curname(), zconf_lineno());
283 } else
284 YYERROR;
285};
286
287choice_block:
288 /* empty */
289 | choice_block common_stmt
290;
291
292/* if entry */
293
294if_entry: T_IF expr nl
295{
296 printd(DEBUG_PARSE, "%s:%d:if\n", zconf_curname(), zconf_lineno());
297 menu_add_entry(NULL);
298 menu_add_dep($2);
299 $$ = menu_add_menu();
300};
301
302if_end: end
303{
304 if (zconf_endtoken($1, T_IF, T_ENDIF)) {
305 menu_end_menu();
306 printd(DEBUG_PARSE, "%s:%d:endif\n", zconf_curname(), zconf_lineno());
307 }
308};
309
310if_stmt: if_entry if_block if_end
311;
312
313if_block:
314 /* empty */
315 | if_block common_stmt
316 | if_block menu_stmt
317 | if_block choice_stmt
318;
319
320/* menu entry */
321
322menu: T_MENU prompt T_EOL
323{
324 menu_add_entry(NULL);
325 menu_add_prompt(P_MENU, $2, NULL);
326 printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
327};
328
329menu_entry: menu depends_list
330{
331 $$ = menu_add_menu();
332};
333
334menu_end: end
335{
336 if (zconf_endtoken($1, T_MENU, T_ENDMENU)) {
337 menu_end_menu();
338 printd(DEBUG_PARSE, "%s:%d:endmenu\n", zconf_curname(), zconf_lineno());
339 }
340};
341
342menu_stmt: menu_entry menu_block menu_end
343;
344
345menu_block:
346 /* empty */
347 | menu_block common_stmt
348 | menu_block menu_stmt
349 | menu_block choice_stmt
350;
351
352source_stmt: T_SOURCE prompt T_EOL
353{
354 printd(DEBUG_PARSE, "%s:%d:source %s\n", zconf_curname(), zconf_lineno(), $2);
355 zconf_nextfile($2);
356};
357
358/* comment entry */
359
360comment: T_COMMENT prompt T_EOL
361{
362 menu_add_entry(NULL);
363 menu_add_prompt(P_COMMENT, $2, NULL);
364 printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
365};
366
367comment_stmt: comment depends_list
368{
369 menu_end_entry();
370};
371
372/* help option */
373
374help_start: T_HELP T_EOL
375{
376 printd(DEBUG_PARSE, "%s:%d:help\n", zconf_curname(), zconf_lineno());
377 zconf_starthelp();
378};
379
380help: help_start T_HELPTEXT
381{
382 current_entry->sym->help = $2;
383};
384
385/* depends option */
386
387depends_list:
388 /* empty */
389 | depends_list depends
390 | depends_list T_EOL
391 | depends_list option_error
392;
393
394depends: T_DEPENDS T_ON expr T_EOL
395{
396 menu_add_dep($3);
397 printd(DEBUG_PARSE, "%s:%d:depends on\n", zconf_curname(), zconf_lineno());
398}
399 | T_DEPENDS expr T_EOL
400{
401 menu_add_dep($2);
402 printd(DEBUG_PARSE, "%s:%d:depends\n", zconf_curname(), zconf_lineno());
403}
404 | T_REQUIRES expr T_EOL
405{
406 menu_add_dep($2);
407 printd(DEBUG_PARSE, "%s:%d:requires\n", zconf_curname(), zconf_lineno());
408};
409
410/* prompt statement */
411
412prompt_stmt_opt:
413 /* empty */
414 | prompt if_expr
415{
416 menu_add_prompt(P_PROMPT, $1, $2);
417};
418
419prompt: T_WORD
420 | T_WORD_QUOTE
421;
422
423end: T_ENDMENU T_EOL { $$ = $1; }
424 | T_ENDCHOICE T_EOL { $$ = $1; }
425 | T_ENDIF T_EOL { $$ = $1; }
426;
427
428nl:
429 T_EOL
430 | nl T_EOL
431;
432
433if_expr: /* empty */ { $$ = NULL; }
434 | T_IF expr { $$ = $2; }
435;
436
437expr: symbol { $$ = expr_alloc_symbol($1); }
438 | symbol T_EQUAL symbol { $$ = expr_alloc_comp(E_EQUAL, $1, $3); }
439 | symbol T_UNEQUAL symbol { $$ = expr_alloc_comp(E_UNEQUAL, $1, $3); }
440 | T_OPEN_PAREN expr T_CLOSE_PAREN { $$ = $2; }
441 | T_NOT expr { $$ = expr_alloc_one(E_NOT, $2); }
442 | expr T_OR expr { $$ = expr_alloc_two(E_OR, $1, $3); }
443 | expr T_AND expr { $$ = expr_alloc_two(E_AND, $1, $3); }
444;
445
446symbol: T_WORD { $$ = sym_lookup($1, 0); free($1); }
447 | T_WORD_QUOTE { $$ = sym_lookup($1, 1); free($1); }
448;
449
450%%
451
452void conf_parse(const char *name)
453{
454 struct symbol *sym;
455 int i;
456
457 zconf_initscan(name);
458
459 sym_init();
460 menu_init();
461 modules_sym = sym_lookup("MODULES", 0);
462 rootmenu.prompt = menu_add_prompt(P_MENU, "Busybox Configuration", NULL);
463
464#if YYDEBUG
465 if (getenv("ZCONF_DEBUG"))
466 zconfdebug = 1;
467#endif
468 zconfparse();
469 if (zconfnerrs)
470 exit(1);
471 menu_finalize(&rootmenu);
472 for_all_symbols(i, sym) {
473 sym_check_deps(sym);
474 }
475
476 sym_change_count = 1;
477}
478
479const char *zconf_tokenname(int token)
480{
481 switch (token) {
482 case T_MENU: return "menu";
483 case T_ENDMENU: return "endmenu";
484 case T_CHOICE: return "choice";
485 case T_ENDCHOICE: return "endchoice";
486 case T_IF: return "if";
487 case T_ENDIF: return "endif";
488 case T_DEPENDS: return "depends";
489 }
490 return "<token>";
491}
492
493static bool zconf_endtoken(struct kconf_id *id, int starttoken, int endtoken)
494{
495 if (id->token != endtoken) {
496 zconf_error("unexpected '%s' within %s block",
497 kconf_id_strings + id->name, zconf_tokenname(starttoken));
498 zconfnerrs++;
499 return false;
500 }
501 if (current_menu->file != current_file) {
502 zconf_error("'%s' in different file than '%s'",
503 kconf_id_strings + id->name, zconf_tokenname(starttoken));
504 fprintf(stderr, "%s:%d: location of the '%s'\n",
505 current_menu->file->name, current_menu->lineno,
506 zconf_tokenname(starttoken));
507 zconfnerrs++;
508 return false;
509 }
510 return true;
511}
512
513static void zconfprint(const char *err, ...)
514{
515 va_list ap;
516
517 fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
518 va_start(ap, err);
519 vfprintf(stderr, err, ap);
520 va_end(ap);
521 fprintf(stderr, "\n");
522}
523
524static void zconf_error(const char *err, ...)
525{
526 va_list ap;
527
528 zconfnerrs++;
529 fprintf(stderr, "%s:%d: ", zconf_curname(), zconf_lineno());
530 va_start(ap, err);
531 vfprintf(stderr, err, ap);
532 va_end(ap);
533 fprintf(stderr, "\n");
534}
535
536static void zconferror(const char *err)
537{
538#if YYDEBUG
539 fprintf(stderr, "%s:%d: %s\n", zconf_curname(), zconf_lineno() + 1, err);
540#endif
541}
542
543void print_quoted_string(FILE *out, const char *str)
544{
545 const char *p;
546 int len;
547
548 putc('"', out);
549 while ((p = strchr(str, '"'))) {
550 len = p - str;
551 if (len)
552 fprintf(out, "%.*s", len, str);
553 fputs("\\\"", out);
554 str = p + 1;
555 }
556 fputs(str, out);
557 putc('"', out);
558}
559
560void print_symbol(FILE *out, struct menu *menu)
561{
562 struct symbol *sym = menu->sym;
563 struct property *prop;
564
565 if (sym_is_choice(sym))
566 fprintf(out, "choice\n");
567 else
568 fprintf(out, "config %s\n", sym->name);
569 switch (sym->type) {
570 case S_BOOLEAN:
571 fputs(" boolean\n", out);
572 break;
573 case S_TRISTATE:
574 fputs(" tristate\n", out);
575 break;
576 case S_STRING:
577 fputs(" string\n", out);
578 break;
579 case S_INT:
580 fputs(" integer\n", out);
581 break;
582 case S_HEX:
583 fputs(" hex\n", out);
584 break;
585 default:
586 fputs(" ???\n", out);
587 break;
588 }
589 for (prop = sym->prop; prop; prop = prop->next) {
590 if (prop->menu != menu)
591 continue;
592 switch (prop->type) {
593 case P_PROMPT:
594 fputs(" prompt ", out);
595 print_quoted_string(out, prop->text);
596 if (!expr_is_yes(prop->visible.expr)) {
597 fputs(" if ", out);
598 expr_fprint(prop->visible.expr, out);
599 }
600 fputc('\n', out);
601 break;
602 case P_DEFAULT:
603 fputs( " default ", out);
604 expr_fprint(prop->expr, out);
605 if (!expr_is_yes(prop->visible.expr)) {
606 fputs(" if ", out);
607 expr_fprint(prop->visible.expr, out);
608 }
609 fputc('\n', out);
610 break;
611 case P_CHOICE:
612 fputs(" #choice value\n", out);
613 break;
614 default:
615 fprintf(out, " unknown prop %d!\n", prop->type);
616 break;
617 }
618 }
619 if (sym->help) {
620 int len = strlen(sym->help);
621 while (sym->help[--len] == '\n')
622 sym->help[len] = 0;
623 fprintf(out, " help\n%s\n", sym->help);
624 }
625 fputc('\n', out);
626}
627
628void zconfdump(FILE *out)
629{
630 struct property *prop;
631 struct symbol *sym;
632 struct menu *menu;
633
634 menu = rootmenu.list;
635 while (menu) {
636 if ((sym = menu->sym))
637 print_symbol(out, menu);
638 else if ((prop = menu->prompt)) {
639 switch (prop->type) {
640 case P_COMMENT:
641 fputs("\ncomment ", out);
642 print_quoted_string(out, prop->text);
643 fputs("\n", out);
644 break;
645 case P_MENU:
646 fputs("\nmenu ", out);
647 print_quoted_string(out, prop->text);
648 fputs("\n", out);
649 break;
650 default:
651 ;
652 }
653 if (!expr_is_yes(prop->visible.expr)) {
654 fputs(" depends ", out);
655 expr_fprint(prop->visible.expr, out);
656 fputc('\n', out);
657 }
658 fputs("\n", out);
659 }
660
661 if (menu->list)
662 menu = menu->list;
663 else if (menu->next)
664 menu = menu->next;
665 else while ((menu = menu->parent)) {
666 if (menu->prompt && menu->prompt->type == P_MENU)
667 fputs("\nendmenu\n", out);
668 if (menu->next) {
669 menu = menu->next;
670 break;
671 }
672 }
673 }
674}
675
676#include "lex.zconf.c"
677#include "util.c"
678#include "confdata.c"
679#include "expr.c"
680#include "symbol.c"
681#include "menu.c"
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