Function main

util/nvramtool/cli/nvramtool.c:91–167

* main ****************************************************************************/

 * main
 ****************************************************************************/
int main(int argc, char *argv[])
{
	void *cmos_default = NULL;
	cmos_layout_get_fn_t fn = get_layout_from_cmos_table;

	parse_nvramtool_args(argc, argv);

	/* If we should operate on a CBFS file default to reading the layout
	 * and CMOS contents from it. */
	if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].found) {
		open_cbfs(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CBFS_FILE].param);
		if (!nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].found) {
			cmos_default = cbfs_find_file("cmos.default", CBFS_COMPONENT_CMOS_DEFAULT, NULL);
			if (cmos_default == NULL) {
				fprintf(stderr, "Need a cmos.default in the CBFS image or separate CMOS file (-D).\n");
				exit(1);
			}
		}
		fn = get_layout_from_cbfs_file;
	}

	/* If the user wants to use a specific layout file or explicitly use
	 * the coreboot option table allow him to override previous settings. */
	if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found) {
		set_layout_filename(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].param);
		fn = get_layout_from_file;
	} else if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found) {
		fn = get_layout_from_cmos_table;
	}

	/* Allow the user to use a file for the CMOS contents, possibly
	 * overriding a previously opened "cmos.default" file from the CBFS. */
	if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].found) {
		struct stat fd_stat;
		int fd;

		if ((fd = open(nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param, O_RDWR | O_CREAT, 0666)) < 0) {
			fprintf(stderr, "Couldn't open '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
			exit(1);
		}

		if (fstat(fd, &fd_stat) == -1) {
			fprintf(stderr, "Couldn't stat '%s'\n", nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
			exit(1);
		}

		if (fd_stat.st_size < CMOS_SIZE) {
			if ((lseek(fd, CMOS_SIZE - 1, SEEK_SET) == -1) ||
			    (write(fd, "\0", 1) != 1)) {
				fprintf(stderr, "Unable to extended '%s' to its full size.\n",
						nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_FILE].param);
				exit(1);
			}
#ifndef __MINGW32__
			fsync(fd);
#else
			FlushFileBuffers ((HANDLE) _get_osfhandle (fd));
#endif