kconfig: factor out code in confdata.c
[linux-3.10.git] / scripts / kconfig / confdata.c
1 /*
2  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3  * Released under the terms of the GNU GPL v2.0.
4  */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <fcntl.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <time.h>
13 #include <unistd.h>
14
15 #define LKC_DIRECT_LINK
16 #include "lkc.h"
17
18 static void conf_warning(const char *fmt, ...)
19         __attribute__ ((format (printf, 1, 2)));
20
21 static const char *conf_filename;
22 static int conf_lineno, conf_warnings, conf_unsaved;
23
24 const char conf_defname[] = "arch/$ARCH/defconfig";
25
26 static void conf_warning(const char *fmt, ...)
27 {
28         va_list ap;
29         va_start(ap, fmt);
30         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31         vfprintf(stderr, fmt, ap);
32         fprintf(stderr, "\n");
33         va_end(ap);
34         conf_warnings++;
35 }
36
37 const char *conf_get_configname(void)
38 {
39         char *name = getenv("KCONFIG_CONFIG");
40
41         return name ? name : ".config";
42 }
43
44 static char *conf_expand_value(const char *in)
45 {
46         struct symbol *sym;
47         const char *src;
48         static char res_value[SYMBOL_MAXLENGTH];
49         char *dst, name[SYMBOL_MAXLENGTH];
50
51         res_value[0] = 0;
52         dst = name;
53         while ((src = strchr(in, '$'))) {
54                 strncat(res_value, in, src - in);
55                 src++;
56                 dst = name;
57                 while (isalnum(*src) || *src == '_')
58                         *dst++ = *src++;
59                 *dst = 0;
60                 sym = sym_lookup(name, 0);
61                 sym_calc_value(sym);
62                 strcat(res_value, sym_get_string_value(sym));
63                 in = src;
64         }
65         strcat(res_value, in);
66
67         return res_value;
68 }
69
70 char *conf_get_default_confname(void)
71 {
72         struct stat buf;
73         static char fullname[PATH_MAX+1];
74         char *env, *name;
75
76         name = conf_expand_value(conf_defname);
77         env = getenv(SRCTREE);
78         if (env) {
79                 sprintf(fullname, "%s/%s", env, name);
80                 if (!stat(fullname, &buf))
81                         return fullname;
82         }
83         return name;
84 }
85
86 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
87 {
88         char *p2;
89
90         switch (sym->type) {
91         case S_TRISTATE:
92                 if (p[0] == 'm') {
93                         sym->def[def].tri = mod;
94                         sym->flags |= def_flags;
95                         break;
96                 }
97         case S_BOOLEAN:
98                 if (p[0] == 'y') {
99                         sym->def[def].tri = yes;
100                         sym->flags |= def_flags;
101                         break;
102                 }
103                 if (p[0] == 'n') {
104                         sym->def[def].tri = no;
105                         sym->flags |= def_flags;
106                         break;
107                 }
108                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
109                 break;
110         case S_OTHER:
111                 if (*p != '"') {
112                         for (p2 = p; *p2 && !isspace(*p2); p2++)
113                                 ;
114                         sym->type = S_STRING;
115                         goto done;
116                 }
117         case S_STRING:
118                 if (*p++ != '"')
119                         break;
120                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
121                         if (*p2 == '"') {
122                                 *p2 = 0;
123                                 break;
124                         }
125                         memmove(p2, p2 + 1, strlen(p2));
126                 }
127                 if (!p2) {
128                         conf_warning("invalid string found");
129                         return 1;
130                 }
131         case S_INT:
132         case S_HEX:
133         done:
134                 if (sym_string_valid(sym, p)) {
135                         sym->def[def].val = strdup(p);
136                         sym->flags |= def_flags;
137                 } else {
138                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
139                         return 1;
140                 }
141                 break;
142         default:
143                 ;
144         }
145         return 0;
146 }
147
148 int conf_read_simple(const char *name, int def)
149 {
150         FILE *in = NULL;
151         char line[1024];
152         char *p, *p2;
153         struct symbol *sym;
154         int i, def_flags;
155
156         if (name) {
157                 in = zconf_fopen(name);
158         } else {
159                 struct property *prop;
160
161                 name = conf_get_configname();
162                 in = zconf_fopen(name);
163                 if (in)
164                         goto load;
165                 sym_add_change_count(1);
166                 if (!sym_defconfig_list)
167                         return 1;
168
169                 for_all_defaults(sym_defconfig_list, prop) {
170                         if (expr_calc_value(prop->visible.expr) == no ||
171                             prop->expr->type != E_SYMBOL)
172                                 continue;
173                         name = conf_expand_value(prop->expr->left.sym->name);
174                         in = zconf_fopen(name);
175                         if (in) {
176                                 printf(_("#\n"
177                                          "# using defaults found in %s\n"
178                                          "#\n"), name);
179                                 goto load;
180                         }
181                 }
182         }
183         if (!in)
184                 return 1;
185
186 load:
187         conf_filename = name;
188         conf_lineno = 0;
189         conf_warnings = 0;
190         conf_unsaved = 0;
191
192         def_flags = SYMBOL_DEF << def;
193         for_all_symbols(i, sym) {
194                 sym->flags |= SYMBOL_CHANGED;
195                 sym->flags &= ~(def_flags|SYMBOL_VALID);
196                 if (sym_is_choice(sym))
197                         sym->flags |= def_flags;
198                 switch (sym->type) {
199                 case S_INT:
200                 case S_HEX:
201                 case S_STRING:
202                         if (sym->def[def].val)
203                                 free(sym->def[def].val);
204                 default:
205                         sym->def[def].val = NULL;
206                         sym->def[def].tri = no;
207                 }
208         }
209
210         while (fgets(line, sizeof(line), in)) {
211                 conf_lineno++;
212                 sym = NULL;
213                 switch (line[0]) {
214                 case '#':
215                         if (memcmp(line + 2, "CONFIG_", 7))
216                                 continue;
217                         p = strchr(line + 9, ' ');
218                         if (!p)
219                                 continue;
220                         *p++ = 0;
221                         if (strncmp(p, "is not set", 10))
222                                 continue;
223                         if (def == S_DEF_USER) {
224                                 sym = sym_find(line + 9);
225                                 if (!sym) {
226                                         conf_warning("trying to assign nonexistent symbol %s", line + 9);
227                                         break;
228                                 }
229                         } else {
230                                 sym = sym_lookup(line + 9, 0);
231                                 if (sym->type == S_UNKNOWN)
232                                         sym->type = S_BOOLEAN;
233                         }
234                         if (sym->flags & def_flags) {
235                                 conf_warning("trying to reassign symbol %s", sym->name);
236                                 break;
237                         }
238                         switch (sym->type) {
239                         case S_BOOLEAN:
240                         case S_TRISTATE:
241                                 sym->def[def].tri = no;
242                                 sym->flags |= def_flags;
243                                 break;
244                         default:
245                                 ;
246                         }
247                         break;
248                 case 'C':
249                         if (memcmp(line, "CONFIG_", 7)) {
250                                 conf_warning("unexpected data");
251                                 continue;
252                         }
253                         p = strchr(line + 7, '=');
254                         if (!p)
255                                 continue;
256                         *p++ = 0;
257                         p2 = strchr(p, '\n');
258                         if (p2) {
259                                 *p2-- = 0;
260                                 if (*p2 == '\r')
261                                         *p2 = 0;
262                         }
263                         if (def == S_DEF_USER) {
264                                 sym = sym_find(line + 7);
265                                 if (!sym) {
266                                         conf_warning("trying to assign nonexistent symbol %s", line + 7);
267                                         break;
268                                 }
269                         } else {
270                                 sym = sym_lookup(line + 7, 0);
271                                 if (sym->type == S_UNKNOWN)
272                                         sym->type = S_OTHER;
273                         }
274                         if (sym->flags & def_flags) {
275                                 conf_warning("trying to reassign symbol %s", sym->name);
276                                 break;
277                         }
278                         if (conf_set_sym_val(sym, def, def_flags, p))
279                                 continue;
280                         break;
281                 case '\r':
282                 case '\n':
283                         break;
284                 default:
285                         conf_warning("unexpected data");
286                         continue;
287                 }
288                 if (sym && sym_is_choice_value(sym)) {
289                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
290                         switch (sym->def[def].tri) {
291                         case no:
292                                 break;
293                         case mod:
294                                 if (cs->def[def].tri == yes) {
295                                         conf_warning("%s creates inconsistent choice state", sym->name);
296                                         cs->flags &= ~def_flags;
297                                 }
298                                 break;
299                         case yes:
300                                 if (cs->def[def].tri != no) {
301                                         conf_warning("%s creates inconsistent choice state", sym->name);
302                                         cs->flags &= ~def_flags;
303                                 } else
304                                         cs->def[def].val = sym;
305                                 break;
306                         }
307                         cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
308                 }
309         }
310         fclose(in);
311
312         if (modules_sym)
313                 sym_calc_value(modules_sym);
314         return 0;
315 }
316
317 int conf_read(const char *name)
318 {
319         struct symbol *sym;
320         struct property *prop;
321         struct expr *e;
322         int i, flags;
323
324         sym_set_change_count(0);
325
326         if (conf_read_simple(name, S_DEF_USER))
327                 return 1;
328
329         for_all_symbols(i, sym) {
330                 sym_calc_value(sym);
331                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
332                         goto sym_ok;
333                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
334                         /* check that calculated value agrees with saved value */
335                         switch (sym->type) {
336                         case S_BOOLEAN:
337                         case S_TRISTATE:
338                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
339                                         break;
340                                 if (!sym_is_choice(sym))
341                                         goto sym_ok;
342                         default:
343                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
344                                         goto sym_ok;
345                                 break;
346                         }
347                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
348                         /* no previous value and not saved */
349                         goto sym_ok;
350                 conf_unsaved++;
351                 /* maybe print value in verbose mode... */
352         sym_ok:
353                 if (!sym_is_choice(sym))
354                         continue;
355                 /* The choice symbol only has a set value (and thus is not new)
356                  * if all its visible childs have values.
357                  */
358                 prop = sym_get_choice_prop(sym);
359                 flags = sym->flags;
360                 for (e = prop->expr; e; e = e->left.expr)
361                         if (e->right.sym->visible != no)
362                                 flags &= e->right.sym->flags;
363                 sym->flags &= flags | ~SYMBOL_DEF_USER;
364         }
365
366         for_all_symbols(i, sym) {
367                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
368                         /* Reset values of generates values, so they'll appear
369                          * as new, if they should become visible, but that
370                          * doesn't quite work if the Kconfig and the saved
371                          * configuration disagree.
372                          */
373                         if (sym->visible == no && !conf_unsaved)
374                                 sym->flags &= ~SYMBOL_DEF_USER;
375                         switch (sym->type) {
376                         case S_STRING:
377                         case S_INT:
378                         case S_HEX:
379                                 /* Reset a string value if it's out of range */
380                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
381                                         break;
382                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
383                                 conf_unsaved++;
384                                 break;
385                         default:
386                                 break;
387                         }
388                 }
389         }
390
391         sym_add_change_count(conf_warnings || conf_unsaved);
392
393         return 0;
394 }
395
396 int conf_write(const char *name)
397 {
398         FILE *out;
399         struct symbol *sym;
400         struct menu *menu;
401         const char *basename;
402         char dirname[128], tmpname[128], newname[128];
403         int type, l;
404         const char *str;
405         time_t now;
406         int use_timestamp = 1;
407         char *env;
408
409         dirname[0] = 0;
410         if (name && name[0]) {
411                 struct stat st;
412                 char *slash;
413
414                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
415                         strcpy(dirname, name);
416                         strcat(dirname, "/");
417                         basename = conf_get_configname();
418                 } else if ((slash = strrchr(name, '/'))) {
419                         int size = slash - name + 1;
420                         memcpy(dirname, name, size);
421                         dirname[size] = 0;
422                         if (slash[1])
423                                 basename = slash + 1;
424                         else
425                                 basename = conf_get_configname();
426                 } else
427                         basename = name;
428         } else
429                 basename = conf_get_configname();
430
431         sprintf(newname, "%s%s", dirname, basename);
432         env = getenv("KCONFIG_OVERWRITECONFIG");
433         if (!env || !*env) {
434                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
435                 out = fopen(tmpname, "w");
436         } else {
437                 *tmpname = 0;
438                 out = fopen(newname, "w");
439         }
440         if (!out)
441                 return 1;
442
443         sym = sym_lookup("KERNELVERSION", 0);
444         sym_calc_value(sym);
445         time(&now);
446         env = getenv("KCONFIG_NOTIMESTAMP");
447         if (env && *env)
448                 use_timestamp = 0;
449
450         fprintf(out, _("#\n"
451                        "# Automatically generated make config: don't edit\n"
452                        "# Linux kernel version: %s\n"
453                        "%s%s"
454                        "#\n"),
455                      sym_get_string_value(sym),
456                      use_timestamp ? "# " : "",
457                      use_timestamp ? ctime(&now) : "");
458
459         if (!conf_get_changed())
460                 sym_clear_all_valid();
461
462         menu = rootmenu.list;
463         while (menu) {
464                 sym = menu->sym;
465                 if (!sym) {
466                         if (!menu_is_visible(menu))
467                                 goto next;
468                         str = menu_get_prompt(menu);
469                         fprintf(out, "\n"
470                                      "#\n"
471                                      "# %s\n"
472                                      "#\n", str);
473                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
474                         sym_calc_value(sym);
475                         if (!(sym->flags & SYMBOL_WRITE))
476                                 goto next;
477                         sym->flags &= ~SYMBOL_WRITE;
478                         type = sym->type;
479                         if (type == S_TRISTATE) {
480                                 sym_calc_value(modules_sym);
481                                 if (modules_sym->curr.tri == no)
482                                         type = S_BOOLEAN;
483                         }
484                         switch (type) {
485                         case S_BOOLEAN:
486                         case S_TRISTATE:
487                                 switch (sym_get_tristate_value(sym)) {
488                                 case no:
489                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
490                                         break;
491                                 case mod:
492                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
493                                         break;
494                                 case yes:
495                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
496                                         break;
497                                 }
498                                 break;
499                         case S_STRING:
500                                 str = sym_get_string_value(sym);
501                                 fprintf(out, "CONFIG_%s=\"", sym->name);
502                                 while (1) {
503                                         l = strcspn(str, "\"\\");
504                                         if (l) {
505                                                 fwrite(str, l, 1, out);
506                                                 str += l;
507                                         }
508                                         if (!*str)
509                                                 break;
510                                         fprintf(out, "\\%c", *str++);
511                                 }
512                                 fputs("\"\n", out);
513                                 break;
514                         case S_HEX:
515                                 str = sym_get_string_value(sym);
516                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
517                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
518                                         break;
519                                 }
520                         case S_INT:
521                                 str = sym_get_string_value(sym);
522                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
523                                 break;
524                         }
525                 }
526
527         next:
528                 if (menu->list) {
529                         menu = menu->list;
530                         continue;
531                 }
532                 if (menu->next)
533                         menu = menu->next;
534                 else while ((menu = menu->parent)) {
535                         if (menu->next) {
536                                 menu = menu->next;
537                                 break;
538                         }
539                 }
540         }
541         fclose(out);
542
543         if (*tmpname) {
544                 strcat(dirname, basename);
545                 strcat(dirname, ".old");
546                 rename(newname, dirname);
547                 if (rename(tmpname, newname))
548                         return 1;
549         }
550
551         printf(_("#\n"
552                  "# configuration written to %s\n"
553                  "#\n"), newname);
554
555         sym_set_change_count(0);
556
557         return 0;
558 }
559
560 int conf_split_config(void)
561 {
562         char *name, path[128];
563         char *s, *d, c;
564         struct symbol *sym;
565         struct stat sb;
566         int res, i, fd;
567
568         name = getenv("KCONFIG_AUTOCONFIG");
569         if (!name)
570                 name = "include/config/auto.conf";
571         conf_read_simple(name, S_DEF_AUTO);
572
573         if (chdir("include/config"))
574                 return 1;
575
576         res = 0;
577         for_all_symbols(i, sym) {
578                 sym_calc_value(sym);
579                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
580                         continue;
581                 if (sym->flags & SYMBOL_WRITE) {
582                         if (sym->flags & SYMBOL_DEF_AUTO) {
583                                 /*
584                                  * symbol has old and new value,
585                                  * so compare them...
586                                  */
587                                 switch (sym->type) {
588                                 case S_BOOLEAN:
589                                 case S_TRISTATE:
590                                         if (sym_get_tristate_value(sym) ==
591                                             sym->def[S_DEF_AUTO].tri)
592                                                 continue;
593                                         break;
594                                 case S_STRING:
595                                 case S_HEX:
596                                 case S_INT:
597                                         if (!strcmp(sym_get_string_value(sym),
598                                                     sym->def[S_DEF_AUTO].val))
599                                                 continue;
600                                         break;
601                                 default:
602                                         break;
603                                 }
604                         } else {
605                                 /*
606                                  * If there is no old value, only 'no' (unset)
607                                  * is allowed as new value.
608                                  */
609                                 switch (sym->type) {
610                                 case S_BOOLEAN:
611                                 case S_TRISTATE:
612                                         if (sym_get_tristate_value(sym) == no)
613                                                 continue;
614                                         break;
615                                 default:
616                                         break;
617                                 }
618                         }
619                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
620                         /* There is neither an old nor a new value. */
621                         continue;
622                 /* else
623                  *      There is an old value, but no new value ('no' (unset)
624                  *      isn't saved in auto.conf, so the old value is always
625                  *      different from 'no').
626                  */
627
628                 /* Replace all '_' and append ".h" */
629                 s = sym->name;
630                 d = path;
631                 while ((c = *s++)) {
632                         c = tolower(c);
633                         *d++ = (c == '_') ? '/' : c;
634                 }
635                 strcpy(d, ".h");
636
637                 /* Assume directory path already exists. */
638                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
639                 if (fd == -1) {
640                         if (errno != ENOENT) {
641                                 res = 1;
642                                 break;
643                         }
644                         /*
645                          * Create directory components,
646                          * unless they exist already.
647                          */
648                         d = path;
649                         while ((d = strchr(d, '/'))) {
650                                 *d = 0;
651                                 if (stat(path, &sb) && mkdir(path, 0755)) {
652                                         res = 1;
653                                         goto out;
654                                 }
655                                 *d++ = '/';
656                         }
657                         /* Try it again. */
658                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
659                         if (fd == -1) {
660                                 res = 1;
661                                 break;
662                         }
663                 }
664                 close(fd);
665         }
666 out:
667         if (chdir("../.."))
668                 return 1;
669
670         return res;
671 }
672
673 int conf_write_autoconf(void)
674 {
675         struct symbol *sym;
676         const char *str;
677         char *name;
678         FILE *out, *out_h;
679         time_t now;
680         int i, l;
681
682         sym_clear_all_valid();
683
684         file_write_dep("include/config/auto.conf.cmd");
685
686         if (conf_split_config())
687                 return 1;
688
689         out = fopen(".tmpconfig", "w");
690         if (!out)
691                 return 1;
692
693         out_h = fopen(".tmpconfig.h", "w");
694         if (!out_h) {
695                 fclose(out);
696                 return 1;
697         }
698
699         sym = sym_lookup("KERNELVERSION", 0);
700         sym_calc_value(sym);
701         time(&now);
702         fprintf(out, "#\n"
703                      "# Automatically generated make config: don't edit\n"
704                      "# Linux kernel version: %s\n"
705                      "# %s"
706                      "#\n",
707                      sym_get_string_value(sym), ctime(&now));
708         fprintf(out_h, "/*\n"
709                        " * Automatically generated C config: don't edit\n"
710                        " * Linux kernel version: %s\n"
711                        " * %s"
712                        " */\n"
713                        "#define AUTOCONF_INCLUDED\n",
714                        sym_get_string_value(sym), ctime(&now));
715
716         for_all_symbols(i, sym) {
717                 sym_calc_value(sym);
718                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
719                         continue;
720                 switch (sym->type) {
721                 case S_BOOLEAN:
722                 case S_TRISTATE:
723                         switch (sym_get_tristate_value(sym)) {
724                         case no:
725                                 break;
726                         case mod:
727                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
728                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
729                                 break;
730                         case yes:
731                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
732                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
733                                 break;
734                         }
735                         break;
736                 case S_STRING:
737                         str = sym_get_string_value(sym);
738                         fprintf(out, "CONFIG_%s=\"", sym->name);
739                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
740                         while (1) {
741                                 l = strcspn(str, "\"\\");
742                                 if (l) {
743                                         fwrite(str, l, 1, out);
744                                         fwrite(str, l, 1, out_h);
745                                         str += l;
746                                 }
747                                 if (!*str)
748                                         break;
749                                 fprintf(out, "\\%c", *str);
750                                 fprintf(out_h, "\\%c", *str);
751                                 str++;
752                         }
753                         fputs("\"\n", out);
754                         fputs("\"\n", out_h);
755                         break;
756                 case S_HEX:
757                         str = sym_get_string_value(sym);
758                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
759                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
760                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
761                                 break;
762                         }
763                 case S_INT:
764                         str = sym_get_string_value(sym);
765                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
766                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
767                         break;
768                 default:
769                         break;
770                 }
771         }
772         fclose(out);
773         fclose(out_h);
774
775         name = getenv("KCONFIG_AUTOHEADER");
776         if (!name)
777                 name = "include/linux/autoconf.h";
778         if (rename(".tmpconfig.h", name))
779                 return 1;
780         name = getenv("KCONFIG_AUTOCONFIG");
781         if (!name)
782                 name = "include/config/auto.conf";
783         /*
784          * This must be the last step, kbuild has a dependency on auto.conf
785          * and this marks the successful completion of the previous steps.
786          */
787         if (rename(".tmpconfig", name))
788                 return 1;
789
790         return 0;
791 }
792
793 static int sym_change_count;
794 static void (*conf_changed_callback)(void);
795
796 void sym_set_change_count(int count)
797 {
798         int _sym_change_count = sym_change_count;
799         sym_change_count = count;
800         if (conf_changed_callback &&
801             (bool)_sym_change_count != (bool)count)
802                 conf_changed_callback();
803 }
804
805 void sym_add_change_count(int count)
806 {
807         sym_set_change_count(count + sym_change_count);
808 }
809
810 bool conf_get_changed(void)
811 {
812         return sym_change_count;
813 }
814
815 void conf_set_changed_callback(void (*fn)(void))
816 {
817         conf_changed_callback = fn;
818 }