scripts/config/confdata.c - busybox - Git at Google

 /*
  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  * Released under the terms of the GNU GPL v2.0.
  *
  * Allow 'n' as a symbol value.
  * 2002-11-05 Petr Baudis <pasky@ucw.cz>
  */

 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>

 #define LKC_DIRECT_LINK
 #include "lkc.h"

 const char conf_def_filename[] = ".config";

 const char conf_defname[] = "sysdeps/linux/defconfig";

 const char *conf_confnames[] = {
 	".config",
 	conf_defname,
 	NULL,
 };

 static char *conf_expand_value(const char *in)
 {
 	struct symbol *sym;
 	const char *src;
 	static char res_value[SYMBOL_MAXLENGTH];
 	char *dst, name[SYMBOL_MAXLENGTH];

 	res_value[0] = 0;
 	dst = name;
 	while ((src = strchr(in, '$'))) {
 		strncat(res_value, in, src - in);
 		src++;
 		dst = name;
 		while (isalnum((int)*src) || *src == '_')
 			*dst++ = *src++;
 		*dst = 0;
 		sym = sym_lookup(name, 0);
 		sym_calc_value(sym);
 		strcat(res_value, sym_get_string_value(sym));
 		in = src;
 	}
 	strcat(res_value, in);

 	return res_value;
 }

 char *conf_get_default_confname(void)
 {
 	return conf_expand_value(conf_defname);
 }

 int conf_read(const char *name)
 {
 	FILE *in = NULL;
 	char line[1024];
 	char *p, *p2;
 	int lineno = 0;
 	struct symbol *sym;
 	struct property *prop;
 	struct expr *e;
 	int i;

 	if (name) {
 		in = fopen(name, "r");
 	} else {
 		const char **names = conf_confnames;
 		while ((name = *names++)) {
 			name = conf_expand_value(name);
 			in = fopen(name, "r");
 			if (in) {
 				printf("#\n"
 				       "# using defaults found in %s\n"
 				       "#\n", name);
 				break;
 			}
 		}
 	}

 	if (!in)
 		return 1;

 	for_all_symbols(i, sym) {
 		sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 		sym->flags &= ~SYMBOL_VALID;
 		switch (sym->type) {
 		case S_INT:
 		case S_HEX:
 		case S_STRING:
 			if (S_VAL(sym->def))
 				free(S_VAL(sym->def));
 		default:
 			S_VAL(sym->def) = NULL;
 			S_TRI(sym->def) = no;
 			;
 		}
 	}

 	while (fgets(line, sizeof(line), in)) {
 		lineno++;
 		switch (line[0]) {
 		case '\n':
 			break;
 		case ' ':
 			break;
 		case '#':
 			p = strchr(line, ' ');
 			if (!p)
 				continue;
 			*p++ = 0;
 			p = strchr(p, ' ');
 			if (!p)
 				continue;
 			*p++ = 0;
 			if (strncmp(p, "is not set", 10))
 				continue;
 			sym = sym_lookup(line+2, 0);
 			switch (sym->type) {
 			case S_BOOLEAN:
 			case S_TRISTATE:
 				sym->def = symbol_no.curr;
 				sym->flags &= ~SYMBOL_NEW;
 				break;
 			default:
 				;
 			}
 			break;
 		case 'A' ... 'Z':
 			p = strchr(line, '=');
 			if (!p)
 				continue;
 			*p++ = 0;
 			p2 = strchr(p, '\n');
 			if (p2)
 				*p2 = 0;
 			sym = sym_find(line);
 			if (!sym) {
 				fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line);
 				break;
 			}
 			switch (sym->type) {
   			case S_TRISTATE:
 				if (p[0] == 'm') {
 					S_TRI(sym->def) = mod;
 					sym->flags &= ~SYMBOL_NEW;
 					break;
 				}
 			case S_BOOLEAN:
 				if (p[0] == 'y') {
 					S_TRI(sym->def) = yes;
 					sym->flags &= ~SYMBOL_NEW;
 					break;
 				}
 				if (p[0] == 'n') {
 					S_TRI(sym->def) = no;
 					sym->flags &= ~SYMBOL_NEW;
 					break;
 				}
   				break;
 			case S_STRING:
 				if (*p++ != '"')
 					break;
 				for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
 					if (*p2 == '"') {
 						*p2 = 0;
 						break;
 					}
 					memmove(p2, p2 + 1, strlen(p2));
 				}
 			case S_INT:
 			case S_HEX:
 				if (sym_string_valid(sym, p)) {
 					S_VAL(sym->def) = strdup(p);
 					sym->flags &= ~SYMBOL_NEW;
 				} else
 					fprintf(stderr, "%s:%d:symbol value '%s' invalid for %s\n", name, lineno, p, sym->name);
 				break;
 			default:
 				;
 			}
 			if (sym_is_choice_value(sym)) {
 				prop = sym_get_choice_prop(sym);
 				switch (S_TRI(sym->def)) {
 				case mod:
 					if (S_TRI(prop->def->def) == yes)
 						/* warn? */;
 					break;
 				case yes:
 					if (S_TRI(prop->def->def) != no)
 						/* warn? */;
 					S_VAL(prop->def->def) = sym;
 					break;
 				case no:
 					break;
 				}
 				S_TRI(prop->def->def) = S_TRI(sym->def);
 			}
 			break;
 		default:
 			continue;
 		}
 	}
 	fclose(in);

 	for_all_symbols(i, sym) {
 		if (!sym_is_choice(sym))
 			continue;
 		prop = sym_get_choice_prop(sym);
 		for (e = prop->dep; e; e = e->left.expr)
 			sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 		sym->flags &= ~SYMBOL_NEW;
 	}

 	sym_change_count = 1;

 	return 0;
 }

 int conf_write(const char *name)
 {
 	FILE *out, *out_h;
 	struct symbol *sym;
 	struct menu *menu;
 	char oldname[128];
 	int type, l;
 	const char *str;

 	out = fopen(".tmpconfig", "w");
 	if (!out)
 		return 1;
 	out_h = fopen(".tmpconfig.h", "w");
 	if (!out_h)
 		return 1;
 	fprintf(out, "#\n"
 		     "# Automatically generated make config: don't edit\n"
 		     "#\n");
 	fprintf(out_h, "/*\n"
 		       " * Automatically generated header file: don't edit\n"
 		       " */\n\n"
 		       "#define AUTOCONF_INCLUDED\n\n"
 		       "/* Version Number */\n"
 		       "#define BB_VER \"%s\"\n"
 		       "#define BB_BT \"%s\"\n\n",
 		       getenv("VERSION"),
 		       getenv("BUILDTIME")
        );

 	if (!sym_change_count)
 		sym_clear_all_valid();

 	menu = rootmenu.list;
 	while (menu) {
 		sym = menu->sym;
 		if (!sym) {
 			if (!menu_is_visible(menu))
 				goto next;
 			str = menu_get_prompt(menu);
 			fprintf(out, "\n"
 				     "#\n"
 				     "# %s\n"
 				     "#\n", str);
 			fprintf(out_h, "\n"
 				       "/*\n"
 				       " * %s\n"
 				       " */\n", str);
 		} else if (!(sym->flags & SYMBOL_CHOICE)) {
 			sym_calc_value(sym);
 			if (!(sym->flags & SYMBOL_WRITE))
 				goto next;
 			sym->flags &= ~SYMBOL_WRITE;
 			type = sym->type;
 			if (type == S_TRISTATE) {
 				sym_calc_value(modules_sym);
 				if (S_TRI(modules_sym->curr) == no)
 					type = S_BOOLEAN;
 			}
 			switch (type) {
 			case S_BOOLEAN:
 			case S_TRISTATE:
 				switch (sym_get_tristate_value(sym)) {
 				case no:
 					fprintf(out, "# %s is not set\n", sym->name);
 					fprintf(out_h, "#undef %s\n", sym->name);
 					break;
 				case mod:
 #if 0
 					fprintf(out, "%s=m\n", sym->name);
 					fprintf(out_h, "#define __%s__MODULE 1\n", sym->name);
 #endif
 					break;
 				case yes:
 					fprintf(out, "%s=y\n", sym->name);
 					fprintf(out_h, "#define %s 1\n", sym->name);
 					break;
 				}
 				break;
 			case S_STRING:
 				// fix me
 				str = sym_get_string_value(sym);
 				fprintf(out, "%s=\"", sym->name);
 				fprintf(out_h, "#define %s \"", sym->name);
 				do {
 					l = strcspn(str, "\"\\");
 					if (l) {
 						fwrite(str, l, 1, out);
 						fwrite(str, l, 1, out_h);
 					}
 					str += l;
 					while (*str == '\\' || *str == '"') {
 						fprintf(out, "\\%c", *str);
 						fprintf(out_h, "\\%c", *str);
 						str++;
 					}
 				} while (*str);
 				fputs("\"\n", out);
 				fputs("\"\n", out_h);
 				break;
 			case S_HEX:
 				str = sym_get_string_value(sym);
 				if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
 					fprintf(out, "%s=%s\n", sym->name, str);
 					fprintf(out_h, "#define %s 0x%s\n", sym->name, str);
 					break;
 				}
 			case S_INT:
 				str = sym_get_string_value(sym);
 				fprintf(out, "%s=%s\n", sym->name, str);
 				fprintf(out_h, "#define %s %s\n", sym->name, str);
 				break;
 			}
 		}

 	next:
 		if (menu->list) {
 			menu = menu->list;
 			continue;
 		}
 		if (menu->next)
 			menu = menu->next;
 		else while ((menu = menu->parent)) {
 			if (menu->next) {
 				menu = menu->next;
 				break;
 			}
 		}
 	}
 	fclose(out);
 	fclose(out_h);

 	if (!name) {
 		rename(".tmpconfig.h", "include/config.h");
 		name = conf_def_filename;
 		file_write_dep(NULL);
 	} else
 		unlink(".tmpconfig.h");

 	sprintf(oldname, "%s.old", name);
 	rename(name, oldname);
 	if (rename(".tmpconfig", name))
 		return 1;

 	sym_change_count = 0;

 	return 0;
 }
	/*
	* Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
	* Released under the terms of the GNU GPL v2.0.
	*
	* Allow 'n' as a symbol value.
	* 2002-11-05 Petr Baudis <pasky@ucw.cz>
	*/

	#include <ctype.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <unistd.h>

	#define LKC_DIRECT_LINK
	#include "lkc.h"

	const char conf_def_filename[] = ".config";

	const char conf_defname[] = "sysdeps/linux/defconfig";

	const char *conf_confnames[] = {
	".config",
	conf_defname,
	NULL,
	};

	static char conf_expand_value(const char in)
	{
	struct symbol *sym;
	const char *src;
	static char res_value[SYMBOL_MAXLENGTH];
	char *dst, name[SYMBOL_MAXLENGTH];

	res_value[0] = 0;
	dst = name;
	while ((src = strchr(in, '$'))) {
	strncat(res_value, in, src - in);
	src++;
	dst = name;
	while (isalnum((int)src) \|\| src == '_')
	dst++ = src++;
	*dst = 0;
	sym = sym_lookup(name, 0);
	sym_calc_value(sym);
	strcat(res_value, sym_get_string_value(sym));
	in = src;
	}
	strcat(res_value, in);

	return res_value;
	}

	char *conf_get_default_confname(void)
	{
	return conf_expand_value(conf_defname);
	}

	int conf_read(const char *name)
	{
	FILE *in = NULL;
	char line[1024];
	char p, p2;
	int lineno = 0;
	struct symbol *sym;
	struct property *prop;
	struct expr *e;
	int i;

	if (name) {
	in = fopen(name, "r");
	} else {
	const char **names = conf_confnames;
	while ((name = *names++)) {
	name = conf_expand_value(name);
	in = fopen(name, "r");
	if (in) {
	printf("#\n"
	"# using defaults found in %s\n"
	"#\n", name);
	break;
	}
	}
	}

	if (!in)
	return 1;

	for_all_symbols(i, sym) {
	sym->flags \|= SYMBOL_NEW \| SYMBOL_CHANGED;
	sym->flags &= ~SYMBOL_VALID;
	switch (sym->type) {
	case S_INT:
	case S_HEX:
	case S_STRING:
	if (S_VAL(sym->def))
	free(S_VAL(sym->def));
	default:
	S_VAL(sym->def) = NULL;
	S_TRI(sym->def) = no;
	;
	}
	}

	while (fgets(line, sizeof(line), in)) {
	lineno++;
	switch (line[0]) {
	case '\n':
	break;
	case ' ':
	break;
	case '#':
	p = strchr(line, ' ');
	if (!p)
	continue;
	*p++ = 0;
	p = strchr(p, ' ');
	if (!p)
	continue;
	*p++ = 0;
	if (strncmp(p, "is not set", 10))
	continue;
	sym = sym_lookup(line+2, 0);
	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
	sym->def = symbol_no.curr;
	sym->flags &= ~SYMBOL_NEW;
	break;
	default:
	;
	}
	break;
	case 'A' ... 'Z':
	p = strchr(line, '=');
	if (!p)
	continue;
	*p++ = 0;
	p2 = strchr(p, '\n');
	if (p2)
	*p2 = 0;
	sym = sym_find(line);
	if (!sym) {
	fprintf(stderr, "%s:%d: trying to assign nonexistent symbol %s\n", name, lineno, line);
	break;
	}
	switch (sym->type) {
	case S_TRISTATE:
	if (p[0] == 'm') {
	S_TRI(sym->def) = mod;
	sym->flags &= ~SYMBOL_NEW;
	break;
	}
	case S_BOOLEAN:
	if (p[0] == 'y') {
	S_TRI(sym->def) = yes;
	sym->flags &= ~SYMBOL_NEW;
	break;
	}
	if (p[0] == 'n') {
	S_TRI(sym->def) = no;
	sym->flags &= ~SYMBOL_NEW;
	break;
	}
	break;
	case S_STRING:
	if (*p++ != '"')
	break;
	for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
	if (*p2 == '"') {
	*p2 = 0;
	break;
	}
	memmove(p2, p2 + 1, strlen(p2));
	}
	case S_INT:
	case S_HEX:
	if (sym_string_valid(sym, p)) {
	S_VAL(sym->def) = strdup(p);
	sym->flags &= ~SYMBOL_NEW;
	} else
	fprintf(stderr, "%s:%d:symbol value '%s' invalid for %s\n", name, lineno, p, sym->name);
	break;
	default:
	;
	}
	if (sym_is_choice_value(sym)) {
	prop = sym_get_choice_prop(sym);
	switch (S_TRI(sym->def)) {
	case mod:
	if (S_TRI(prop->def->def) == yes)
	/* warn? */;
	break;
	case yes:
	if (S_TRI(prop->def->def) != no)
	/* warn? */;
	S_VAL(prop->def->def) = sym;
	break;
	case no:
	break;
	}
	S_TRI(prop->def->def) = S_TRI(sym->def);
	}
	break;
	default:
	continue;
	}
	}
	fclose(in);

	for_all_symbols(i, sym) {
	if (!sym_is_choice(sym))
	continue;
	prop = sym_get_choice_prop(sym);
	for (e = prop->dep; e; e = e->left.expr)
	sym->flags \|= e->right.sym->flags & SYMBOL_NEW;
	sym->flags &= ~SYMBOL_NEW;
	}

	sym_change_count = 1;

	return 0;
	}

	int conf_write(const char *name)
	{
	FILE out, out_h;
	struct symbol *sym;
	struct menu *menu;
	char oldname[128];
	int type, l;
	const char *str;

	out = fopen(".tmpconfig", "w");
	if (!out)
	return 1;
	out_h = fopen(".tmpconfig.h", "w");
	if (!out_h)
	return 1;
	fprintf(out, "#\n"
	"# Automatically generated make config: don't edit\n"
	"#\n");
	fprintf(out_h, "/*\n"
	" * Automatically generated header file: don't edit\n"
	" */\n\n"
	"#define AUTOCONF_INCLUDED\n\n"
	"/* Version Number */\n"
	"#define BB_VER \"%s\"\n"
	"#define BB_BT \"%s\"\n\n",
	getenv("VERSION"),
	getenv("BUILDTIME")
	);

	if (!sym_change_count)
	sym_clear_all_valid();

	menu = rootmenu.list;
	while (menu) {
	sym = menu->sym;
	if (!sym) {
	if (!menu_is_visible(menu))
	goto next;
	str = menu_get_prompt(menu);
	fprintf(out, "\n"
	"#\n"
	"# %s\n"
	"#\n", str);
	fprintf(out_h, "\n"
	"/*\n"
	" * %s\n"
	" */\n", str);
	} else if (!(sym->flags & SYMBOL_CHOICE)) {
	sym_calc_value(sym);
	if (!(sym->flags & SYMBOL_WRITE))
	goto next;
	sym->flags &= ~SYMBOL_WRITE;
	type = sym->type;
	if (type == S_TRISTATE) {
	sym_calc_value(modules_sym);
	if (S_TRI(modules_sym->curr) == no)
	type = S_BOOLEAN;
	}
	switch (type) {
	case S_BOOLEAN:
	case S_TRISTATE:
	switch (sym_get_tristate_value(sym)) {
	case no:
	fprintf(out, "# %s is not set\n", sym->name);
	fprintf(out_h, "#undef %s\n", sym->name);
	break;
	case mod:
	#if 0
	fprintf(out, "%s=m\n", sym->name);
	fprintf(out_h, "#define __%s__MODULE 1\n", sym->name);
	#endif
	break;
	case yes:
	fprintf(out, "%s=y\n", sym->name);
	fprintf(out_h, "#define %s 1\n", sym->name);
	break;
	}
	break;
	case S_STRING:
	// fix me
	str = sym_get_string_value(sym);
	fprintf(out, "%s=\"", sym->name);
	fprintf(out_h, "#define %s \"", sym->name);
	do {
	l = strcspn(str, "\"\\");
	if (l) {
	fwrite(str, l, 1, out);
	fwrite(str, l, 1, out_h);
	}
	str += l;
	while (str == '\\' \|\| str == '"') {
	fprintf(out, "\\%c", *str);
	fprintf(out_h, "\\%c", *str);
	str++;
	}
	} while (*str);
	fputs("\"\n", out);
	fputs("\"\n", out_h);
	break;
	case S_HEX:
	str = sym_get_string_value(sym);
	if (str[0] != '0' \|\| (str[1] != 'x' && str[1] != 'X')) {
	fprintf(out, "%s=%s\n", sym->name, str);
	fprintf(out_h, "#define %s 0x%s\n", sym->name, str);
	break;
	}
	case S_INT:
	str = sym_get_string_value(sym);
	fprintf(out, "%s=%s\n", sym->name, str);
	fprintf(out_h, "#define %s %s\n", sym->name, str);
	break;
	}
	}

	next:
	if (menu->list) {
	menu = menu->list;
	continue;
	}
	if (menu->next)
	menu = menu->next;
	else while ((menu = menu->parent)) {
	if (menu->next) {
	menu = menu->next;
	break;
	}
	}
	}
	fclose(out);
	fclose(out_h);

	if (!name) {
	rename(".tmpconfig.h", "include/config.h");
	name = conf_def_filename;
	file_write_dep(NULL);
	} else
	unlink(".tmpconfig.h");

	sprintf(oldname, "%s.old", name);
	rename(name, oldname);
	if (rename(".tmpconfig", name))
	return 1;

	sym_change_count = 0;

	return 0;
	}