scripts/kconfig/confdata.c - linux - Git at Google

 /*
  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
  * Released under the terms of the GNU GPL v2.0.
  */

 #include <sys/stat.h>
 #include <ctype.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <time.h>
 #include <unistd.h>

 #define LKC_DIRECT_LINK
 #include "lkc.h"

 static void conf_warning(const char *fmt, ...)
 	__attribute__ ((format (printf, 1, 2)));

 static const char *conf_filename;
 static int conf_lineno, conf_warnings, conf_unsaved;

 const char conf_def_filename[] = ".config";

 const char conf_defname[] = "arch/$ARCH/defconfig";

 const char *conf_confnames[] = {
 	".config",
 	"/lib/modules/$UNAME_RELEASE/.config",
 	"/etc/kernel-config",
 	"/boot/config-$UNAME_RELEASE",
 	conf_defname,
 	NULL,
 };

 static void conf_warning(const char *fmt, ...)
 {
 	va_list ap;
 	va_start(ap, fmt);
 	fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
 	vfprintf(stderr, fmt, ap);
 	fprintf(stderr, "\n");
 	va_end(ap);
 	conf_warnings++;
 }

 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(*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)
 {
 	struct stat buf;
 	static char fullname[PATH_MAX+1];
 	char *env, *name;

 	name = conf_expand_value(conf_defname);
 	env = getenv(SRCTREE);
 	if (env) {
 		sprintf(fullname, "%s/%s", env, name);
 		if (!stat(fullname, &buf))
 			return fullname;
 	}
 	return name;
 }

 int conf_read_simple(const char *name)
 {
 	FILE *in = NULL;
 	char line[1024];
 	char *p, *p2;
 	struct symbol *sym;
 	int i;

 	if (name) {
 		in = zconf_fopen(name);
 	} else {
 		const char **names = conf_confnames;
 		while ((name = *names++)) {
 			name = conf_expand_value(name);
 			in = zconf_fopen(name);
 			if (in) {
 				printf(_("#\n"
 				         "# using defaults found in %s\n"
 				         "#\n"), name);
 				break;
 			}
 		}
 	}
 	if (!in)
 		return 1;

 	conf_filename = name;
 	conf_lineno = 0;
 	conf_warnings = 0;
 	conf_unsaved = 0;

 	for_all_symbols(i, sym) {
 		sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
 		if (sym_is_choice(sym))
 			sym->flags &= ~SYMBOL_NEW;
 		sym->flags &= ~SYMBOL_VALID;
 		switch (sym->type) {
 		case S_INT:
 		case S_HEX:
 		case S_STRING:
 			if (sym->user.val)
 				free(sym->user.val);
 		default:
 			sym->user.val = NULL;
 			sym->user.tri = no;
 		}
 	}

 	while (fgets(line, sizeof(line), in)) {
 		conf_lineno++;
 		sym = NULL;
 		switch (line[0]) {
 		case '#':
 			if (memcmp(line + 2, "CONFIG_", 7))
 				continue;
 			p = strchr(line + 9, ' ');
 			if (!p)
 				continue;
 			*p++ = 0;
 			if (strncmp(p, "is not set", 10))
 				continue;
 			sym = sym_find(line + 9);
 			if (!sym) {
 				conf_warning("trying to assign nonexistent symbol %s", line + 9);
 				break;
 			} else if (!(sym->flags & SYMBOL_NEW)) {
 				conf_warning("trying to reassign symbol %s", sym->name);
 				break;
 			}
 			switch (sym->type) {
 			case S_BOOLEAN:
 			case S_TRISTATE:
 				sym->user.tri = no;
 				sym->flags &= ~SYMBOL_NEW;
 				break;
 			default:
 				;
 			}
 			break;
 		case 'C':
 			if (memcmp(line, "CONFIG_", 7)) {
 				conf_warning("unexpected data");
 				continue;
 			}
 			p = strchr(line + 7, '=');
 			if (!p)
 				continue;
 			*p++ = 0;
 			p2 = strchr(p, '\n');
 			if (p2)
 				*p2 = 0;
 			sym = sym_find(line + 7);
 			if (!sym) {
 				conf_warning("trying to assign nonexistent symbol %s", line + 7);
 				break;
 			} else if (!(sym->flags & SYMBOL_NEW)) {
 				conf_warning("trying to reassign symbol %s", sym->name);
 				break;
 			}
 			switch (sym->type) {
 			case S_TRISTATE:
 				if (p[0] == 'm') {
 					sym->user.tri = mod;
 					sym->flags &= ~SYMBOL_NEW;
 					break;
 				}
 			case S_BOOLEAN:
 				if (p[0] == 'y') {
 					sym->user.tri = yes;
 					sym->flags &= ~SYMBOL_NEW;
 					break;
 				}
 				if (p[0] == 'n') {
 					sym->user.tri = no;
 					sym->flags &= ~SYMBOL_NEW;
 					break;
 				}
 				conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 				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));
 				}
 				if (!p2) {
 					conf_warning("invalid string found");
 					continue;
 				}
 			case S_INT:
 			case S_HEX:
 				if (sym_string_valid(sym, p)) {
 					sym->user.val = strdup(p);
 					sym->flags &= ~SYMBOL_NEW;
 				} else {
 					conf_warning("symbol value '%s' invalid for %s", p, sym->name);
 					continue;
 				}
 				break;
 			default:
 				;
 			}
 			break;
 		case '\n':
 			break;
 		default:
 			conf_warning("unexpected data");
 			continue;
 		}
 		if (sym && sym_is_choice_value(sym)) {
 			struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
 			switch (sym->user.tri) {
 			case no:
 				break;
 			case mod:
 				if (cs->user.tri == yes) {
 					conf_warning("%s creates inconsistent choice state", sym->name);
 					cs->flags |= SYMBOL_NEW;
 				}
 				break;
 			case yes:
 				if (cs->user.tri != no) {
 					conf_warning("%s creates inconsistent choice state", sym->name);
 					cs->flags |= SYMBOL_NEW;
 				} else
 					cs->user.val = sym;
 				break;
 			}
 			cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
 		}
 	}
 	fclose(in);

 	if (modules_sym)
 		sym_calc_value(modules_sym);
 	return 0;
 }

 int conf_read(const char *name)
 {
 	struct symbol *sym;
 	struct property *prop;
 	struct expr *e;
 	int i;

 	if (conf_read_simple(name))
 		return 1;

 	for_all_symbols(i, sym) {
 		sym_calc_value(sym);
 		if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
 			goto sym_ok;
 		if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
 			/* check that calculated value agrees with saved value */
 			switch (sym->type) {
 			case S_BOOLEAN:
 			case S_TRISTATE:
 				if (sym->user.tri != sym_get_tristate_value(sym))
 					break;
 				if (!sym_is_choice(sym))
 					goto sym_ok;
 			default:
 				if (!strcmp(sym->curr.val, sym->user.val))
 					goto sym_ok;
 				break;
 			}
 		} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
 			/* no previous value and not saved */
 			goto sym_ok;
 		conf_unsaved++;
 		/* maybe print value in verbose mode... */
 	sym_ok:
 		if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
 			if (sym->visible == no)
 				sym->flags |= SYMBOL_NEW;
 			switch (sym->type) {
 			case S_STRING:
 			case S_INT:
 			case S_HEX:
 				if (!sym_string_within_range(sym, sym->user.val)) {
 					sym->flags |= SYMBOL_NEW;
 					sym->flags &= ~SYMBOL_VALID;
 				}
 			default:
 				break;
 			}
 		}
 		if (!sym_is_choice(sym))
 			continue;
 		prop = sym_get_choice_prop(sym);
 		for (e = prop->expr; e; e = e->left.expr)
 			if (e->right.sym->visible != no)
 				sym->flags |= e->right.sym->flags & SYMBOL_NEW;
 	}

 	sym_change_count = conf_warnings || conf_unsaved;

 	return 0;
 }

 int conf_write(const char *name)
 {
 	FILE *out, *out_h;
 	struct symbol *sym;
 	struct menu *menu;
 	const char *basename;
 	char dirname[128], tmpname[128], newname[128];
 	int type, l;
 	const char *str;
 	time_t now;
 	int use_timestamp = 1;
 	char *env;

 	dirname[0] = 0;
 	if (name && name[0]) {
 		struct stat st;
 		char *slash;

 		if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
 			strcpy(dirname, name);
 			strcat(dirname, "/");
 			basename = conf_def_filename;
 		} else if ((slash = strrchr(name, '/'))) {
 			int size = slash - name + 1;
 			memcpy(dirname, name, size);
 			dirname[size] = 0;
 			if (slash[1])
 				basename = slash + 1;
 			else
 				basename = conf_def_filename;
 		} else
 			basename = name;
 	} else
 		basename = conf_def_filename;

 	sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
 	out = fopen(newname, "w");
 	if (!out)
 		return 1;
 	out_h = NULL;
 	if (!name) {
 		out_h = fopen(".tmpconfig.h", "w");
 		if (!out_h)
 			return 1;
 		file_write_dep(NULL);
 	}
 	sym = sym_lookup("KERNELVERSION", 0);
 	sym_calc_value(sym);
 	time(&now);
 	env = getenv("KCONFIG_NOTIMESTAMP");
 	if (env && *env)
 		use_timestamp = 0;

 	fprintf(out, _("#\n"
 		       "# Automatically generated make config: don't edit\n"
 		       "# Linux kernel version: %s\n"
 		       "%s%s"
 		       "#\n"),
 		     sym_get_string_value(sym),
 		     use_timestamp ? "# " : "",
 		     use_timestamp ? ctime(&now) : "");
 	if (out_h)
 		fprintf(out_h, "/*\n"
 			       " * Automatically generated C config: don't edit\n"
 			       " * Linux kernel version: %s\n"
 			       "%s%s"
 			       " */\n"
 			       "#define AUTOCONF_INCLUDED\n",
 			       sym_get_string_value(sym),
 			       use_timestamp ? " * " : "",
 			       use_timestamp ? ctime(&now) : "");

 	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);
 			if (out_h)
 				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 (modules_sym->curr.tri == no)
 					type = S_BOOLEAN;
 			}
 			switch (type) {
 			case S_BOOLEAN:
 			case S_TRISTATE:
 				switch (sym_get_tristate_value(sym)) {
 				case no:
 					fprintf(out, "# CONFIG_%s is not set\n", sym->name);
 					if (out_h)
 						fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
 					break;
 				case mod:
 					fprintf(out, "CONFIG_%s=m\n", sym->name);
 					if (out_h)
 						fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
 					break;
 				case yes:
 					fprintf(out, "CONFIG_%s=y\n", sym->name);
 					if (out_h)
 						fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
 					break;
 				}
 				break;
 			case S_STRING:
 				// fix me
 				str = sym_get_string_value(sym);
 				fprintf(out, "CONFIG_%s=\"", sym->name);
 				if (out_h)
 					fprintf(out_h, "#define CONFIG_%s \"", sym->name);
 				do {
 					l = strcspn(str, "\"\\");
 					if (l) {
 						fwrite(str, l, 1, out);
 						if (out_h)
 							fwrite(str, l, 1, out_h);
 					}
 					str += l;
 					while (*str == '\\' || *str == '"') {
 						fprintf(out, "\\%c", *str);
 						if (out_h)
 							fprintf(out_h, "\\%c", *str);
 						str++;
 					}
 				} while (*str);
 				fputs("\"\n", out);
 				if (out_h)
 					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, "CONFIG_%s=%s\n", sym->name, str);
 					if (out_h)
 						fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
 					break;
 				}
 			case S_INT:
 				str = sym_get_string_value(sym);
 				fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
 				if (out_h)
 					fprintf(out_h, "#define CONFIG_%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);
 	if (out_h) {
 		fclose(out_h);
 		rename(".tmpconfig.h", "include/linux/autoconf.h");
 	}
 	if (!name || basename != conf_def_filename) {
 		if (!name)
 			name = conf_def_filename;
 		sprintf(tmpname, "%s.old", name);
 		rename(name, tmpname);
 	}
 	sprintf(tmpname, "%s%s", dirname, basename);
 	if (rename(newname, tmpname))
 		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.
	*/

	#include <sys/stat.h>
	#include <ctype.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>
	#include <time.h>
	#include <unistd.h>

	#define LKC_DIRECT_LINK
	#include "lkc.h"

	static void conf_warning(const char *fmt, ...)
	__attribute__ ((format (printf, 1, 2)));

	static const char *conf_filename;
	static int conf_lineno, conf_warnings, conf_unsaved;

	const char conf_def_filename[] = ".config";

	const char conf_defname[] = "arch/$ARCH/defconfig";

	const char *conf_confnames[] = {
	".config",
	"/lib/modules/$UNAME_RELEASE/.config",
	"/etc/kernel-config",
	"/boot/config-$UNAME_RELEASE",
	conf_defname,
	NULL,
	};

	static void conf_warning(const char *fmt, ...)
	{
	va_list ap;
	va_start(ap, fmt);
	fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
	vfprintf(stderr, fmt, ap);
	fprintf(stderr, "\n");
	va_end(ap);
	conf_warnings++;
	}

	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(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)
	{
	struct stat buf;
	static char fullname[PATH_MAX+1];
	char env, name;

	name = conf_expand_value(conf_defname);
	env = getenv(SRCTREE);
	if (env) {
	sprintf(fullname, "%s/%s", env, name);
	if (!stat(fullname, &buf))
	return fullname;
	}
	return name;
	}

	int conf_read_simple(const char *name)
	{
	FILE *in = NULL;
	char line[1024];
	char p, p2;
	struct symbol *sym;
	int i;

	if (name) {
	in = zconf_fopen(name);
	} else {
	const char **names = conf_confnames;
	while ((name = *names++)) {
	name = conf_expand_value(name);
	in = zconf_fopen(name);
	if (in) {
	printf(_("#\n"
	"# using defaults found in %s\n"
	"#\n"), name);
	break;
	}
	}
	}
	if (!in)
	return 1;

	conf_filename = name;
	conf_lineno = 0;
	conf_warnings = 0;
	conf_unsaved = 0;

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

	while (fgets(line, sizeof(line), in)) {
	conf_lineno++;
	sym = NULL;
	switch (line[0]) {
	case '#':
	if (memcmp(line + 2, "CONFIG_", 7))
	continue;
	p = strchr(line + 9, ' ');
	if (!p)
	continue;
	*p++ = 0;
	if (strncmp(p, "is not set", 10))
	continue;
	sym = sym_find(line + 9);
	if (!sym) {
	conf_warning("trying to assign nonexistent symbol %s", line + 9);
	break;
	} else if (!(sym->flags & SYMBOL_NEW)) {
	conf_warning("trying to reassign symbol %s", sym->name);
	break;
	}
	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
	sym->user.tri = no;
	sym->flags &= ~SYMBOL_NEW;
	break;
	default:
	;
	}
	break;
	case 'C':
	if (memcmp(line, "CONFIG_", 7)) {
	conf_warning("unexpected data");
	continue;
	}
	p = strchr(line + 7, '=');
	if (!p)
	continue;
	*p++ = 0;
	p2 = strchr(p, '\n');
	if (p2)
	*p2 = 0;
	sym = sym_find(line + 7);
	if (!sym) {
	conf_warning("trying to assign nonexistent symbol %s", line + 7);
	break;
	} else if (!(sym->flags & SYMBOL_NEW)) {
	conf_warning("trying to reassign symbol %s", sym->name);
	break;
	}
	switch (sym->type) {
	case S_TRISTATE:
	if (p[0] == 'm') {
	sym->user.tri = mod;
	sym->flags &= ~SYMBOL_NEW;
	break;
	}
	case S_BOOLEAN:
	if (p[0] == 'y') {
	sym->user.tri = yes;
	sym->flags &= ~SYMBOL_NEW;
	break;
	}
	if (p[0] == 'n') {
	sym->user.tri = no;
	sym->flags &= ~SYMBOL_NEW;
	break;
	}
	conf_warning("symbol value '%s' invalid for %s", p, sym->name);
	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));
	}
	if (!p2) {
	conf_warning("invalid string found");
	continue;
	}
	case S_INT:
	case S_HEX:
	if (sym_string_valid(sym, p)) {
	sym->user.val = strdup(p);
	sym->flags &= ~SYMBOL_NEW;
	} else {
	conf_warning("symbol value '%s' invalid for %s", p, sym->name);
	continue;
	}
	break;
	default:
	;
	}
	break;
	case '\n':
	break;
	default:
	conf_warning("unexpected data");
	continue;
	}
	if (sym && sym_is_choice_value(sym)) {
	struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
	switch (sym->user.tri) {
	case no:
	break;
	case mod:
	if (cs->user.tri == yes) {
	conf_warning("%s creates inconsistent choice state", sym->name);
	cs->flags \|= SYMBOL_NEW;
	}
	break;
	case yes:
	if (cs->user.tri != no) {
	conf_warning("%s creates inconsistent choice state", sym->name);
	cs->flags \|= SYMBOL_NEW;
	} else
	cs->user.val = sym;
	break;
	}
	cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
	}
	}
	fclose(in);

	if (modules_sym)
	sym_calc_value(modules_sym);
	return 0;
	}

	int conf_read(const char *name)
	{
	struct symbol *sym;
	struct property *prop;
	struct expr *e;
	int i;

	if (conf_read_simple(name))
	return 1;

	for_all_symbols(i, sym) {
	sym_calc_value(sym);
	if (sym_is_choice(sym) \|\| (sym->flags & SYMBOL_AUTO))
	goto sym_ok;
	if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
	/* check that calculated value agrees with saved value */
	switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
	if (sym->user.tri != sym_get_tristate_value(sym))
	break;
	if (!sym_is_choice(sym))
	goto sym_ok;
	default:
	if (!strcmp(sym->curr.val, sym->user.val))
	goto sym_ok;
	break;
	}
	} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
	/* no previous value and not saved */
	goto sym_ok;
	conf_unsaved++;
	/* maybe print value in verbose mode... */
	sym_ok:
	if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
	if (sym->visible == no)
	sym->flags \|= SYMBOL_NEW;
	switch (sym->type) {
	case S_STRING:
	case S_INT:
	case S_HEX:
	if (!sym_string_within_range(sym, sym->user.val)) {
	sym->flags \|= SYMBOL_NEW;
	sym->flags &= ~SYMBOL_VALID;
	}
	default:
	break;
	}
	}
	if (!sym_is_choice(sym))
	continue;
	prop = sym_get_choice_prop(sym);
	for (e = prop->expr; e; e = e->left.expr)
	if (e->right.sym->visible != no)
	sym->flags \|= e->right.sym->flags & SYMBOL_NEW;
	}

	sym_change_count = conf_warnings \|\| conf_unsaved;

	return 0;
	}

	int conf_write(const char *name)
	{
	FILE out, out_h;
	struct symbol *sym;
	struct menu *menu;
	const char *basename;
	char dirname[128], tmpname[128], newname[128];
	int type, l;
	const char *str;
	time_t now;
	int use_timestamp = 1;
	char *env;

	dirname[0] = 0;
	if (name && name[0]) {
	struct stat st;
	char *slash;

	if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
	strcpy(dirname, name);
	strcat(dirname, "/");
	basename = conf_def_filename;
	} else if ((slash = strrchr(name, '/'))) {
	int size = slash - name + 1;
	memcpy(dirname, name, size);
	dirname[size] = 0;
	if (slash[1])
	basename = slash + 1;
	else
	basename = conf_def_filename;
	} else
	basename = name;
	} else
	basename = conf_def_filename;

	sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
	out = fopen(newname, "w");
	if (!out)
	return 1;
	out_h = NULL;
	if (!name) {
	out_h = fopen(".tmpconfig.h", "w");
	if (!out_h)
	return 1;
	file_write_dep(NULL);
	}
	sym = sym_lookup("KERNELVERSION", 0);
	sym_calc_value(sym);
	time(&now);
	env = getenv("KCONFIG_NOTIMESTAMP");
	if (env && *env)
	use_timestamp = 0;

	fprintf(out, _("#\n"
	"# Automatically generated make config: don't edit\n"
	"# Linux kernel version: %s\n"
	"%s%s"
	"#\n"),
	sym_get_string_value(sym),
	use_timestamp ? "# " : "",
	use_timestamp ? ctime(&now) : "");
	if (out_h)
	fprintf(out_h, "/*\n"
	" * Automatically generated C config: don't edit\n"
	" * Linux kernel version: %s\n"
	"%s%s"
	" */\n"
	"#define AUTOCONF_INCLUDED\n",
	sym_get_string_value(sym),
	use_timestamp ? " * " : "",
	use_timestamp ? ctime(&now) : "");

	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);
	if (out_h)
	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 (modules_sym->curr.tri == no)
	type = S_BOOLEAN;
	}
	switch (type) {
	case S_BOOLEAN:
	case S_TRISTATE:
	switch (sym_get_tristate_value(sym)) {
	case no:
	fprintf(out, "# CONFIG_%s is not set\n", sym->name);
	if (out_h)
	fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
	break;
	case mod:
	fprintf(out, "CONFIG_%s=m\n", sym->name);
	if (out_h)
	fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
	break;
	case yes:
	fprintf(out, "CONFIG_%s=y\n", sym->name);
	if (out_h)
	fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
	break;
	}
	break;
	case S_STRING:
	// fix me
	str = sym_get_string_value(sym);
	fprintf(out, "CONFIG_%s=\"", sym->name);
	if (out_h)
	fprintf(out_h, "#define CONFIG_%s \"", sym->name);
	do {
	l = strcspn(str, "\"\\");
	if (l) {
	fwrite(str, l, 1, out);
	if (out_h)
	fwrite(str, l, 1, out_h);
	}
	str += l;
	while (str == '\\' \|\| str == '"') {
	fprintf(out, "\\%c", *str);
	if (out_h)
	fprintf(out_h, "\\%c", *str);
	str++;
	}
	} while (*str);
	fputs("\"\n", out);
	if (out_h)
	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, "CONFIG_%s=%s\n", sym->name, str);
	if (out_h)
	fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
	break;
	}
	case S_INT:
	str = sym_get_string_value(sym);
	fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
	if (out_h)
	fprintf(out_h, "#define CONFIG_%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);
	if (out_h) {
	fclose(out_h);
	rename(".tmpconfig.h", "include/linux/autoconf.h");
	}
	if (!name \|\| basename != conf_def_filename) {
	if (!name)
	name = conf_def_filename;
	sprintf(tmpname, "%s.old", name);
	rename(name, tmpname);
	}
	sprintf(tmpname, "%s%s", dirname, basename);
	if (rename(newname, tmpname))
	return 1;

	sym_change_count = 0;

	return 0;
	}