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How to use _create_entries_partition method in autotest

Best Python code snippet using autotest_python

partition.py

Source:partition.py

...682        logging.debug('Creating virtual partition')683        self.img = self._create_disk_img(file_img, file_size)684        self.loop = self._attach_img_loop(self.img)685        self._create_single_partition(self.loop)686        self.device = self._create_entries_partition(self.loop)687        logging.debug('Virtual partition successfuly created')688        logging.debug('Image disk: %s', self.img)689        logging.debug('Loopback device: %s', self.loop)690        logging.debug('Device path: %s', self.device)691    def destroy(self):692        """693        Removes the virtual partition from /dev/mapper, detaches the image file694        from the loopback device and removes the image file.695        """696        logging.debug('Removing virtual partition - device %s', self.device)697        self._remove_entries_partition()698        self._detach_img_loop()699        self._remove_disk_img()700    def _create_disk_img(self, img_path, size):701        """702        Creates a disk image using dd.703        @param img_path: Path to the desired image file.704        @param size: Size of the desired image in Bytes.705        @returns: Path of the image created.706        """707        logging.debug('Creating disk image %s, size = %d Bytes', img_path, size)708        try:709            cmd = 'dd if=/dev/zero of=%s bs=1024 count=%d' % (img_path, size)710            utils.run(cmd)711        except error.CmdError, e:712            e_msg = 'Error creating disk image %s: %s' % (img_path, e)713            raise error.AutotestError(e_msg)714        return img_path715    def _attach_img_loop(self, img_path):716        """717        Attaches a file image to a loopback device using losetup.718        @param img_path: Path of the image file that will be attached to a719                loopback device720        @returns: Path of the loopback device associated.721        """722        logging.debug('Attaching image %s to a loop device', img_path)723        try:724            cmd = 'losetup -f'725            loop_path = utils.system_output(cmd)726            cmd = 'losetup -f %s' % img_path727            utils.run(cmd)728        except error.CmdError, e:729            e_msg = ('Error attaching image %s to a loop device: %s' %730                     (img_path, e))731            raise error.AutotestError(e_msg)732        return loop_path733    def _create_single_partition(self, loop_path):734        """735        Creates a single partition encompassing the whole 'disk' using cfdisk.736        @param loop_path: Path to the loopback device.737        """738        logging.debug('Creating single partition on %s', loop_path)739        try:740            single_part_cmd = '0,,c\n'741            sfdisk_file_path = '/tmp/create_partition.sfdisk'742            sfdisk_cmd_file = open(sfdisk_file_path, 'w')743            sfdisk_cmd_file.write(single_part_cmd)744            sfdisk_cmd_file.close()745            utils.run('sfdisk %s < %s' % (loop_path, sfdisk_file_path))746        except error.CmdError, e:747            e_msg = 'Error partitioning device %s: %s' % (loop_path, e)748            raise error.AutotestError(e_msg)749    def _create_entries_partition(self, loop_path):750        """751        Takes the newly created partition table on the loopback device and752        makes all its devices available under /dev/mapper. As we previously753        have partitioned it using a single partition, only one partition754        will be returned.755        @param loop_path: Path to the loopback device.756        """757        logging.debug('Creating entries under /dev/mapper for %s loop dev',758                      loop_path)759        try:760            cmd = 'kpartx -a %s' % loop_path761            utils.run(cmd)762            l_cmd = 'kpartx -l %s | cut -f1 -d " "' % loop_path763            device = utils.system_output(l_cmd)...

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