SYSFS_PATH
err(EXIT_FAILURE, "Could not read from %s\n", SYSFS_PATH);
err(EXIT_FAILURE, "Could not read from %s\n", SYSFS_PATH);
byte_offset, SYSFS_PATH);
fd = open(SYSFS_PATH, file_mode);
err(EXIT_FAILURE, "%s", SYSFS_PATH);