FM / kconfig

/usr/src/linux-headers-5.15.0-190-generic/scripts/kconfig/

/usr/src/linux-headers-5.15.0-190-generic/scripts/kconfig

Name	Size	Mode	Actions
lxdialog/	-	0755	rm
tests/	-	0755	rm
.conf.cmd	291	0644	edit dl rm
.conf.o.cmd	761	0644	edit dl rm
.confdata.o.cmd	838	0644	edit dl rm
.expr.o.cmd	761	0644	edit dl rm
.lexer.lex.c.cmd	130	0644	edit dl rm
.lexer.lex.o.cmd	829	0644	edit dl rm
.menu.o.cmd	825	0644	edit dl rm
.parser.tab.h.cmd	177	0644	edit dl rm
.parser.tab.o.cmd	903	0644	edit dl rm
.preprocess.o.cmd	821	0644	edit dl rm
.symbol.o.cmd	781	0644	edit dl rm
.util.o.cmd	761	0644	edit dl rm
conf	145520	0755	edit dl rm
conf.c	20558	0644	edit dl rm
conf.o	27848	0644	edit dl rm
confdata.c	23334	0644	edit dl rm
confdata.o	25736	0644	edit dl rm
expr.c	30249	0644	edit dl rm
expr.h	9653	0644	edit dl rm
expr.o	24856	0644	edit dl rm
gconf-cfg.sh	775	0755	edit dl rm
gconf.c	38975	0644	edit dl rm
gconf.glade	25642	0644	edit dl rm
images.c	6573	0644	edit dl rm
images.h	857	0644	edit dl rm
internal.h	172	0644	edit dl rm
lexer.l	9259	0644	edit dl rm
lexer.lex.c	115380	0644	edit dl rm
lexer.lex.o	49544	0644	edit dl rm
list.h	3749	0644	edit dl rm
lkc.h	4044	0644	edit dl rm
lkc_proto.h	2013	0644	edit dl rm
Makefile	7788	0644	edit dl rm
mconf-cfg.sh	1502	0755	edit dl rm
mconf.c	27888	0644	edit dl rm
menu.c	22090	0644	edit dl rm
menu.o	21144	0644	edit dl rm
merge_config.sh	5181	0755	edit dl rm
nconf-cfg.sh	1404	0755	edit dl rm
nconf.c	38875	0644	edit dl rm
nconf.gui.c	14911	0644	edit dl rm
nconf.h	2050	0644	edit dl rm
parser.tab.c	73309	0644	edit dl rm
parser.tab.h	5118	0644	edit dl rm
parser.tab.o	42960	0644	edit dl rm
parser.y	15608	0644	edit dl rm
preprocess.c	11334	0644	edit dl rm
preprocess.o	12088	0644	edit dl rm
qconf-cfg.sh	643	0755	edit dl rm
qconf.cc	44467	0644	edit dl rm
qconf.h	6552	0644	edit dl rm
streamline_config.pl	16821	0755	edit dl rm
symbol.c	29410	0644	edit dl rm
symbol.o	26552	0644	edit dl rm
util.c	2210	0644	edit dl rm
util.o	5104	0644	edit dl rm

Edit: /usr/src/linux-headers-5.15.0-190/scripts/kconfig/confdata.c (23334B)

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 */

#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#include "lkc.h"

/* return true if 'path' exists, false otherwise */
static bool is_present(const char *path)
{
	struct stat st;

return !stat(path, &st);
}

/* return true if 'path' exists and it is a directory, false otherwise */
static bool is_dir(const char *path)
{
	struct stat st;

if (stat(path, &st))
		return false;

return S_ISDIR(st.st_mode);
}

/* return true if the given two files are the same, false otherwise */
static bool is_same(const char *file1, const char *file2)
{
	int fd1, fd2;
	struct stat st1, st2;
	void *map1, *map2;
	bool ret = false;

fd1 = open(file1, O_RDONLY);
	if (fd1 < 0)
		return ret;

fd2 = open(file2, O_RDONLY);
	if (fd2 < 0)
		goto close1;

ret = fstat(fd1, &st1);
	if (ret)
		goto close2;
	ret = fstat(fd2, &st2);
	if (ret)
		goto close2;

if (st1.st_size != st2.st_size)
		goto close2;

map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0);
	if (map1 == MAP_FAILED)
		goto close2;

map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0);
	if (map2 == MAP_FAILED)
		goto close2;

if (bcmp(map1, map2, st1.st_size))
		goto close2;

ret = true;
close2:
	close(fd2);
close1:
	close(fd1);

return ret;
}

/*
 * Create the parent directory of the given path.
 *
 * For example, if 'include/config/auto.conf' is given, create 'include/config'.
 */
static int make_parent_dir(const char *path)
{
	char tmp[PATH_MAX + 1];
	char *p;

strncpy(tmp, path, sizeof(tmp));
	tmp[sizeof(tmp) - 1] = 0;

/* Remove the base name. Just return if nothing is left */
	p = strrchr(tmp, '/');
	if (!p)
		return 0;
	*(p + 1) = 0;

/* Just in case it is an absolute path */
	p = tmp;
	while (*p == '/')
		p++;

while ((p = strchr(p, '/'))) {
		*p = 0;

/* skip if the directory exists */
		if (!is_dir(tmp) && mkdir(tmp, 0755))
			return -1;

*p = '/';
		while (*p == '/')
			p++;
	}

return 0;
}

static char depfile_path[PATH_MAX];
static size_t depfile_prefix_len;

/* touch depfile for symbol 'name' */
static int conf_touch_dep(const char *name)
{
	int fd, ret;
	char *d;

/* check overflow: prefix + name + '\0' must fit in buffer. */
	if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path))
		return -1;

d = depfile_path + depfile_prefix_len;
	strcpy(d, name);

/* Assume directory path already exists. */
	fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
	if (fd == -1) {
		if (errno != ENOENT)
			return -1;

ret = make_parent_dir(depfile_path);
		if (ret)
			return ret;

/* Try it again. */
		fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
		if (fd == -1)
			return -1;
	}
	close(fd);

return 0;
}

struct conf_printer {
	void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
	void (*print_comment)(FILE *, const char *, void *);
};

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

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

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

bool conf_errors(void)
{
	if (conf_warnings)
		return getenv("KCONFIG_WERROR");
	return false;
}

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 void conf_default_message_callback(const char *s)
{
	printf("#\n# ");
	printf("%s", s);
	printf("\n#\n");
}

static void (*conf_message_callback)(const char *s) =
	conf_default_message_callback;
void conf_set_message_callback(void (*fn)(const char *s))
{
	conf_message_callback = fn;
}

static void conf_message(const char *fmt, ...)
{
	va_list ap;
	char buf[4096];

if (!conf_message_callback)
		return;

va_start(ap, fmt);

vsnprintf(buf, sizeof(buf), fmt, ap);
	conf_message_callback(buf);
	va_end(ap);
}

const char *conf_get_configname(void)
{
	char *name = getenv("KCONFIG_CONFIG");

return name ? name : ".config";
}

static const char *conf_get_autoconfig_name(void)
{
	char *name = getenv("KCONFIG_AUTOCONFIG");

return name ? name : "include/config/auto.conf";
}

static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
{
	char *p2;

switch (sym->type) {
	case S_TRISTATE:
		if (p[0] == 'm') {
			sym->def[def].tri = mod;
			sym->flags |= def_flags;
			break;
		}
		/* fall through */
	case S_BOOLEAN:
		if (p[0] == 'y') {
			sym->def[def].tri = yes;
			sym->flags |= def_flags;
			break;
		}
		if (p[0] == 'n') {
			sym->def[def].tri = no;
			sym->flags |= def_flags;
			break;
		}
		if (def != S_DEF_AUTO)
			conf_warning("symbol value '%s' invalid for %s",
				     p, sym->name);
		return 1;
	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) {
			if (def != S_DEF_AUTO)
				conf_warning("invalid string found");
			return 1;
		}
		/* fall through */
	case S_INT:
	case S_HEX:
		if (sym_string_valid(sym, p)) {
			sym->def[def].val = xstrdup(p);
			sym->flags |= def_flags;
		} else {
			if (def != S_DEF_AUTO)
				conf_warning("symbol value '%s' invalid for %s",
					     p, sym->name);
			return 1;
		}
		break;
	default:
		;
	}
	return 0;
}

#define LINE_GROWTH 16
static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
{
	char *nline;
	size_t new_size = slen + 1;
	if (new_size > *n) {
		new_size += LINE_GROWTH - 1;
		new_size *= 2;
		nline = xrealloc(*lineptr, new_size);
		if (!nline)
			return -1;

*lineptr = nline;
		*n = new_size;
	}

(*lineptr)[slen] = c;

return 0;
}

static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
{
	char *line = *lineptr;
	size_t slen = 0;

for (;;) {
		int c = getc(stream);

switch (c) {
		case '\n':
			if (add_byte(c, &line, slen, n) < 0)
				goto e_out;
			slen++;
			/* fall through */
		case EOF:
			if (add_byte('\0', &line, slen, n) < 0)
				goto e_out;
			*lineptr = line;
			if (slen == 0)
				return -1;
			return slen;
		default:
			if (add_byte(c, &line, slen, n) < 0)
				goto e_out;
			slen++;
		}
	}

e_out:
	line[slen-1] = '\0';
	*lineptr = line;
	return -1;
}

int conf_read_simple(const char *name, int def)
{
	FILE *in = NULL;
	char   *line = NULL;
	size_t  line_asize = 0;
	char *p, *p2, *val;
	struct symbol *sym;
	int i, def_flags;
	const char *warn_unknown, *sym_name;

warn_unknown = getenv("KCONFIG_WARN_UNKNOWN_SYMBOLS");
	if (name) {
		in = zconf_fopen(name);
	} else {
		char *env;

name = conf_get_configname();
		in = zconf_fopen(name);
		if (in)
			goto load;
		conf_set_changed(true);

env = getenv("KCONFIG_DEFCONFIG_LIST");
		if (!env)
			return 1;

while (1) {
			bool is_last;

while (isspace(*env))
				env++;

if (!*env)
				break;

p = env;
			while (*p && !isspace(*p))
				p++;

is_last = (*p == '\0');

*p = '\0';

name = env;

in = zconf_fopen(name);
			if (in) {
				conf_message("using defaults found in %s",
					     name);
				goto load;
			}

if (is_last)
				break;

env = p + 1;
		}
	}
	if (!in)
		return 1;

load:
	conf_filename = name;
	conf_lineno = 0;
	conf_warnings = 0;

def_flags = SYMBOL_DEF << def;
	for_all_symbols(i, sym) {
		sym->flags |= SYMBOL_CHANGED;
		sym->flags &= ~(def_flags|SYMBOL_VALID);
		if (sym_is_choice(sym))
			sym->flags |= def_flags;
		switch (sym->type) {
		case S_INT:
		case S_HEX:
		case S_STRING:
			if (sym->def[def].val)
				free(sym->def[def].val);
			/* fall through */
		default:
			sym->def[def].val = NULL;
			sym->def[def].tri = no;
		}
	}

while (compat_getline(&line, &line_asize, in) != -1) {
		conf_lineno++;
		if (line[0] == '#') {
			if (line[1] != ' ')
				continue;
			p = line + 2;
			if (memcmp(p, CONFIG_, strlen(CONFIG_)))
				continue;
			sym_name = p + strlen(CONFIG_);
			p = strchr(sym_name, ' ');
			if (!p)
				continue;
			*p++ = 0;
			if (strncmp(p, "is not set", 10))
				continue;

val = "n";
		} else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
			sym_name = line + strlen(CONFIG_);
			p = strchr(sym_name, '=');
			if (!p)
				continue;
			*p++ = 0;
			val = p;
			p2 = strchr(p, '\n');
			if (p2) {
				*p2-- = 0;
				if (*p2 == '\r')
					*p2 = 0;
			}
		} else {
			if (line[0] != '\r' && line[0] != '\n')
				conf_warning("unexpected data: %.*s",
					     (int)strcspn(line, "\r\n"), line);

continue;
		}

sym = sym_find(sym_name);
		if (!sym) {
			if (def == S_DEF_AUTO) {
				/*
				 * Reading from include/config/auto.conf.
				 * If CONFIG_FOO previously existed in auto.conf
				 * but it is missing now, include/config/FOO
				 * must be touched.
				 */
				conf_touch_dep(sym_name);
			} else {
				if (warn_unknown)
					conf_warning("unknown symbol: %s", sym_name);

conf_set_changed(true);
			}
			continue;
		}

if (sym->flags & def_flags)
			conf_warning("override: reassigning to symbol %s", sym->name);

if (conf_set_sym_val(sym, def, def_flags, val))
			continue;

if (sym && sym_is_choice_value(sym)) {
			struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
			switch (sym->def[def].tri) {
			case no:
				break;
			case mod:
				if (cs->def[def].tri == yes) {
					conf_warning("%s creates inconsistent choice state", sym->name);
					cs->flags &= ~def_flags;
				}
				break;
			case yes:
				if (cs->def[def].tri != no)
					conf_warning("override: %s changes choice state", sym->name);
				cs->def[def].val = sym;
				break;
			}
			cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
		}
	}
	free(line);
	fclose(in);

return 0;
}

int conf_read(const char *name)
{
	struct symbol *sym;
	int conf_unsaved = 0;
	int i;

conf_set_changed(false);

if (conf_read_simple(name, S_DEF_USER)) {
		sym_calc_value(modules_sym);
		return 1;
	}

sym_calc_value(modules_sym);

for_all_symbols(i, sym) {
		sym_calc_value(sym);
		if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
			continue;
		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->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
					continue;
				break;
			default:
				if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
					continue;
				break;
			}
		} else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
			/* no previous value and not saved */
			continue;
		conf_unsaved++;
		/* maybe print value in verbose mode... */
	}

for_all_symbols(i, sym) {
		if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
			/* Reset values of generates values, so they'll appear
			 * as new, if they should become visible, but that
			 * doesn't quite work if the Kconfig and the saved
			 * configuration disagree.
			 */
			if (sym->visible == no && !conf_unsaved)
				sym->flags &= ~SYMBOL_DEF_USER;
			switch (sym->type) {
			case S_STRING:
			case S_INT:
			case S_HEX:
				/* Reset a string value if it's out of range */
				if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
					break;
				sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
				conf_unsaved++;
				break;
			default:
				break;
			}
		}
	}

if (conf_warnings || conf_unsaved)
		conf_set_changed(true);

return 0;
}

/*
 * Kconfig configuration printer
 *
 * This printer is used when generating the resulting configuration after
 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
 * passing a non-NULL argument to the printer.
 *
 */
static void
kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
{

switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE:
		if (*value == 'n') {
			bool skip_unset = (arg != NULL);

if (!skip_unset)
				fprintf(fp, "# %s%s is not set\n",
				    CONFIG_, sym->name);
			return;
		}
		break;
	default:
		break;
	}

fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
}

static void
kconfig_print_comment(FILE *fp, const char *value, void *arg)
{
	const char *p = value;
	size_t l;

for (;;) {
		l = strcspn(p, "\n");
		fprintf(fp, "#");
		if (l) {
			fprintf(fp, " ");
			xfwrite(p, l, 1, fp);
			p += l;
		}
		fprintf(fp, "\n");
		if (*p++ == '\0')
			break;
	}
}

static struct conf_printer kconfig_printer_cb =
{
	.print_symbol = kconfig_print_symbol,
	.print_comment = kconfig_print_comment,
};

/*
 * Header printer
 *
 * This printer is used when generating the `include/generated/autoconf.h' file.
 */
static void
header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
{

switch (sym->type) {
	case S_BOOLEAN:
	case S_TRISTATE: {
		const char *suffix = "";

switch (*value) {
		case 'n':
			break;
		case 'm':
			suffix = "_MODULE";
			/* fall through */
		default:
			fprintf(fp, "#define %s%s%s 1\n",
			    CONFIG_, sym->name, suffix);
		}
		break;
	}
	case S_HEX: {
		const char *prefix = "";

if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
			prefix = "0x";
		fprintf(fp, "#define %s%s %s%s\n",
		    CONFIG_, sym->name, prefix, value);
		break;
	}
	case S_STRING:
	case S_INT:
		fprintf(fp, "#define %s%s %s\n",
		    CONFIG_, sym->name, value);
		break;
	default:
		break;
	}

}

static void
header_print_comment(FILE *fp, const char *value, void *arg)
{
	const char *p = value;
	size_t l;

fprintf(fp, "/*\n");
	for (;;) {
		l = strcspn(p, "\n");
		fprintf(fp, " *");
		if (l) {
			fprintf(fp, " ");
			xfwrite(p, l, 1, fp);
			p += l;
		}
		fprintf(fp, "\n");
		if (*p++ == '\0')
			break;
	}
	fprintf(fp, " */\n");
}

static struct conf_printer header_printer_cb =
{
	.print_symbol = header_print_symbol,
	.print_comment = header_print_comment,
};

static void conf_write_symbol(FILE *fp, struct symbol *sym,
			      struct conf_printer *printer, void *printer_arg)
{
	const char *str;

switch (sym->type) {
	case S_UNKNOWN:
		break;
	case S_STRING:
		str = sym_get_string_value(sym);
		str = sym_escape_string_value(str);
		printer->print_symbol(fp, sym, str, printer_arg);
		free((void *)str);
		break;
	default:
		str = sym_get_string_value(sym);
		printer->print_symbol(fp, sym, str, printer_arg);
	}
}

static void
conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
{
	char buf[256];

snprintf(buf, sizeof(buf),
	    "\n"
	    "Automatically generated file; DO NOT EDIT.\n"
	    "%s\n",
	    rootmenu.prompt->text);

printer->print_comment(fp, buf, printer_arg);
}

/*
 * Write out a minimal config.
 * All values that has default values are skipped as this is redundant.
 */
int conf_write_defconfig(const char *filename)
{
	struct symbol *sym;
	struct menu *menu;
	FILE *out;

out = fopen(filename, "w");
	if (!out)
		return 1;

sym_clear_all_valid();

/* Traverse all menus to find all relevant symbols */
	menu = rootmenu.list;

while (menu != NULL)
	{
		sym = menu->sym;
		if (sym == NULL) {
			if (!menu_is_visible(menu))
				goto next_menu;
		} else if (!sym_is_choice(sym)) {
			sym_calc_value(sym);
			if (!(sym->flags & SYMBOL_WRITE))
				goto next_menu;
			sym->flags &= ~SYMBOL_WRITE;
			/* If we cannot change the symbol - skip */
			if (!sym_is_changeable(sym))
				goto next_menu;
			/* If symbol equals to default value - skip */
			if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
				goto next_menu;

/*
			 * If symbol is a choice value and equals to the
			 * default for a choice - skip.
			 * But only if value is bool and equal to "y" and
			 * choice is not "optional".
			 * (If choice is "optional" then all values can be "n")
			 */
			if (sym_is_choice_value(sym)) {
				struct symbol *cs;
				struct symbol *ds;

cs = prop_get_symbol(sym_get_choice_prop(sym));
				ds = sym_choice_default(cs);
				if (!sym_is_optional(cs) && sym == ds) {
					if ((sym->type == S_BOOLEAN) &&
					    sym_get_tristate_value(sym) == yes)
						goto next_menu;
				}
			}
			conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
		}
next_menu:
		if (menu->list != NULL) {
			menu = menu->list;
		}
		else if (menu->next != NULL) {
			menu = menu->next;
		} else {
			while ((menu = menu->parent)) {
				if (menu->next != NULL) {
					menu = menu->next;
					break;
				}
			}
		}
	}
	fclose(out);
	return 0;
}

int conf_write(const char *name)
{
	FILE *out;
	struct symbol *sym;
	struct menu *menu;
	const char *str;
	char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
	char *env;
	int i;
	bool need_newline = false;

if (!name)
		name = conf_get_configname();

if (!*name) {
		fprintf(stderr, "config name is empty\n");
		return -1;
	}

if (is_dir(name)) {
		fprintf(stderr, "%s: Is a directory\n", name);
		return -1;
	}

if (make_parent_dir(name))
		return -1;

env = getenv("KCONFIG_OVERWRITECONFIG");
	if (env && *env) {
		*tmpname = 0;
		out = fopen(name, "w");
	} else {
		snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
			 name, (int)getpid());
		out = fopen(tmpname, "w");
	}
	if (!out)
		return 1;

conf_write_heading(out, &kconfig_printer_cb, NULL);

if (!conf_get_changed())
		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);
			need_newline = false;
		} else if (!(sym->flags & SYMBOL_CHOICE) &&
			   !(sym->flags & SYMBOL_WRITTEN)) {
			sym_calc_value(sym);
			if (!(sym->flags & SYMBOL_WRITE))
				goto next;
			if (need_newline) {
				fprintf(out, "\n");
				need_newline = false;
			}
			sym->flags |= SYMBOL_WRITTEN;
			conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
		}

next:
		if (menu->list) {
			menu = menu->list;
			continue;
		}
		if (menu->next)
			menu = menu->next;
		else while ((menu = menu->parent)) {
			if (!menu->sym && menu_is_visible(menu) &&
			    menu != &rootmenu) {
				str = menu_get_prompt(menu);
				fprintf(out, "# end of %s\n", str);
				need_newline = true;
			}
			if (menu->next) {
				menu = menu->next;
				break;
			}
		}
	}
	fclose(out);

for_all_symbols(i, sym)
		sym->flags &= ~SYMBOL_WRITTEN;

if (*tmpname) {
		if (is_same(name, tmpname)) {
			conf_message("No change to %s", name);
			unlink(tmpname);
			conf_set_changed(false);
			return 0;
		}

snprintf(oldname, sizeof(oldname), "%s.old", name);
		rename(name, oldname);
		if (rename(tmpname, name))
			return 1;
	}

conf_message("configuration written to %s", name);

conf_set_changed(false);

return 0;
}

/* write a dependency file as used by kbuild to track dependencies */
static int conf_write_dep(const char *name)
{
	struct file *file;
	FILE *out;

out = fopen("..config.tmp", "w");
	if (!out)
		return 1;
	fprintf(out, "deps_config := \\\n");
	for (file = file_list; file; file = file->next) {
		if (file->next)
			fprintf(out, "\t%s \\\n", file->name);
		else
			fprintf(out, "\t%s\n", file->name);
	}
	fprintf(out, "\n%s: \\\n"
		     "\t$(deps_config)\n\n", conf_get_autoconfig_name());

env_write_dep(out, conf_get_autoconfig_name());

fprintf(out, "\n$(deps_config): ;\n");
	fclose(out);

if (make_parent_dir(name))
		return 1;
	rename("..config.tmp", name);
	return 0;
}

static int conf_touch_deps(void)
{
	const char *name, *tmp;
	struct symbol *sym;
	int res, i;

name = conf_get_autoconfig_name();
	tmp = strrchr(name, '/');
	depfile_prefix_len = tmp ? tmp - name + 1 : 0;
	if (depfile_prefix_len + 1 > sizeof(depfile_path))
		return -1;

strncpy(depfile_path, name, depfile_prefix_len);
	depfile_path[depfile_prefix_len] = 0;

conf_read_simple(name, S_DEF_AUTO);
	sym_calc_value(modules_sym);

for_all_symbols(i, sym) {
		sym_calc_value(sym);
		if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
			continue;
		if (sym->flags & SYMBOL_WRITE) {
			if (sym->flags & SYMBOL_DEF_AUTO) {
				/*
				 * symbol has old and new value,
				 * so compare them...
				 */
				switch (sym->type) {
				case S_BOOLEAN:
				case S_TRISTATE:
					if (sym_get_tristate_value(sym) ==
					    sym->def[S_DEF_AUTO].tri)
						continue;
					break;
				case S_STRING:
				case S_HEX:
				case S_INT:
					if (!strcmp(sym_get_string_value(sym),
						    sym->def[S_DEF_AUTO].val))
						continue;
					break;
				default:
					break;
				}
			} else {
				/*
				 * If there is no old value, only 'no' (unset)
				 * is allowed as new value.
				 */
				switch (sym->type) {
				case S_BOOLEAN:
				case S_TRISTATE:
					if (sym_get_tristate_value(sym) == no)
						continue;
					break;
				default:
					break;
				}
			}
		} else if (!(sym->flags & SYMBOL_DEF_AUTO))
			/* There is neither an old nor a new value. */
			continue;
		/* else
		 *	There is an old value, but no new value ('no' (unset)
		 *	isn't saved in auto.conf, so the old value is always
		 *	different from 'no').
		 */

res = conf_touch_dep(sym->name);
		if (res)
			return res;
	}

return 0;
}

int conf_write_autoconf(int overwrite)
{
	struct symbol *sym;
	const char *name;
	const char *autoconf_name = conf_get_autoconfig_name();
	FILE *out, *out_h;
	int i;

if (!overwrite && is_present(autoconf_name))
		return 0;

conf_write_dep("include/config/auto.conf.cmd");

if (conf_touch_deps())
		return 1;

out = fopen(".tmpconfig", "w");
	if (!out)
		return 1;

out_h = fopen(".tmpconfig.h", "w");
	if (!out_h) {
		fclose(out);
		return 1;
	}

conf_write_heading(out, &kconfig_printer_cb, NULL);
	conf_write_heading(out_h, &header_printer_cb, NULL);

for_all_symbols(i, sym) {
		sym_calc_value(sym);
		if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
			continue;

/* write symbols to auto.conf and autoconf.h */
		conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
		conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
	}
	fclose(out);
	fclose(out_h);

name = getenv("KCONFIG_AUTOHEADER");
	if (!name)
		name = "include/generated/autoconf.h";
	if (make_parent_dir(name))
		return 1;
	if (rename(".tmpconfig.h", name))
		return 1;

if (make_parent_dir(autoconf_name))
		return 1;
	/*
	 * This must be the last step, kbuild has a dependency on auto.conf
	 * and this marks the successful completion of the previous steps.
	 */
	if (rename(".tmpconfig", autoconf_name))
		return 1;

return 0;
}

static bool conf_changed;
static void (*conf_changed_callback)(void);

void conf_set_changed(bool val)
{
	bool changed = conf_changed != val;

conf_changed = val;

if (conf_changed_callback && changed)
		conf_changed_callback();
}

bool conf_get_changed(void)
{
	return conf_changed;
}

void conf_set_changed_callback(void (*fn)(void))
{
	conf_changed_callback = fn;
}

void set_all_choice_values(struct symbol *csym)
{
	struct property *prop;
	struct symbol *sym;
	struct expr *e;

prop = sym_get_choice_prop(csym);

/*
	 * Set all non-assinged choice values to no
	 */
	expr_list_for_each_sym(prop->expr, e, sym) {
		if (!sym_has_value(sym))
			sym->def[S_DEF_USER].tri = no;
	}
	csym->flags |= SYMBOL_DEF_USER;
	/* clear VALID to get value calculated */
	csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
}

cmd: