Function __conf_write_autoconf

util/kconfig/confdata.c:1184–1226

}

static int __conf_write_autoconf(const char *filename,
				 void (*print_symbol)(FILE *, struct symbol *),
				 const struct comment_style *comment_style)
{
	char tmp[PATH_MAX];
	FILE *file;
	struct symbol *sym;
	int ret, i;

	if (make_parent_dir(filename))
		return -1;

	ret = snprintf(tmp, sizeof(tmp), "%s.tmp", filename);
	if (ret >= sizeof(tmp)) /* check truncation */
		return -1;

	file = fopen(tmp, "w");
	if (!file) {
		perror("fopen");
		return -1;
	}

	conf_write_heading(file, comment_style);

	int print_negatives = getenv("KCONFIG_NEGATIVES") != NULL;
	for_all_symbols(i, sym)
		if (((sym->flags & SYMBOL_WRITE) || (print_negatives && sym->type != S_STRING)) && sym->name)
			print_symbol(file, sym);

	fflush(file);
	/* check possible errors in conf_write_heading() and print_symbol() */
	ret = ferror(file);
	fclose(file);
	if (ret)
		return -1;

	if (rename(tmp, filename)) {
		perror("rename");
		return -1;
	}

	return 0;
}

int conf_write_autoconf(int overwrite)
{