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o _�d�& � @ s� d dl mZmZ d dlZd dlZd dlZd dlZd dlZd dlZd dl m Z d dl m Z G dd� de �ZG dd� de�ZG d d � d e�ZG d d � d e�ZG d d� de�ZG dd� de�ZG dd� de�ZdS )� )�print_function�unicode_literalsN)�find_executable)�gettextc @ � e Zd ZdS )�AptBtrfsSnapshotErrorN��__name__� __module__� __qualname__� r r �@/usr/lib/python3/dist-packages/DistUpgrade/apt_btrfs_snapshot.pyr ! � r c @ r )�AptBtrfsNotSupportedErrorNr r r r r r % r r c @ r )� AptBtrfsRootWithNoatimeErrorNr r r r r r ) r r c @ s. e Zd ZdZedd� �Zd dd�Zdd� Zd S ) � FstabEntryz a single fstab entry line c C s" |� d�d �� }t|dd� � S )N�#r � )� partition�splitr )�cls�line�argsr r r � from_line/ s zFstabEntry.from_liner c C s( || _ || _|| _|| _|| _|| _d S �N��fs_spec� mountpoint�fstype�options�dump�passno)�selfr r r r r r! r r r �__init__7 s zFstabEntry.__init__c C s d| j | j| j| j| j| jf S )Nz*<FstabEntry '%s' '%s' '%s' '%s' '%s' '%s'>r �r" r r r �__repr__@ s �zFstabEntry.__repr__N)r r )r r r �__doc__� classmethodr r# r% r r r r r - s r c s" e Zd ZdZd� fdd� Z� ZS )�Fstabz a list of FstabEntry items � /etc/fstabc s� t t| ��� t|��3}dd� |D �D ]"}|dks |�d�r qzt�|�}W n ty/ Y qw | �|� qW d � d S 1 sAw Y d S )Nc s s � | ]}|� � V qd S r )�strip)�.0r r r r � <genexpr>L s � z!Fstab.__init__.<locals>.<genexpr>� r ) �superr( r# �open� startswithr r � ValueError�append)r" �fstab� fstab_file� stripped_line�entry�� __class__r r r# H s � �"�zFstab.__init__�r) )r r r r& r# � __classcell__r r r7 r r( F s r( c @ s0 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd S ) �LowLevelCommandszi lowlevel commands invoked to perform various tasks like interact with mount and btrfs tools c C s t �d||g�}|dkS )N�mountr �� subprocess�call)r" r r �retr r r r< Z s zLowLevelCommands.mountc C s t �d|g�}|dkS )N�umountr r= )r" r r@ r r r rA ^ s zLowLevelCommands.umountc C s t �ddd||g�}|dkS )N�btrfs� subvolume�snapshotr r= )r" �source�destr@ r r r �btrfs_subvolume_snapshotb s �z)LowLevelCommands.btrfs_subvolume_snapshotc C s t �ddd|g�}|dkS )NrB rC �deleter r= )r" rD r@ r r r �btrfs_delete_snapshotg s z&LowLevelCommands.btrfs_delete_snapshotN)r r r r& r< rA rG rI r r r r r; V s r; c @ s� e Zd ZdZdZed Zd)dd�Zdd� Zd d � Zd)d d �Z d d� Z dd� Z dd� Z d*dd�Z d+dd�Zdd� Zdd � Zd d � Zd d � Zd!d"� Zd,d$d%�Zd&d'� Zd(S )-�AptBtrfsSnapshotz? the high level object that interacts with the snapshot system z@apt-snapshot-z old-root-r) c C s t |�| _t� | _d | _d S r )r( r3 r; �commands�_btrfs_root_mountpoint)r" r3 r r r r# t s zAptBtrfsSnapshot.__init__c C s t d�sdS | �� }|duS )zx verify that the system supports apt btrfs snapshots by checking if the right fs layout is used etc rB FN)r �%_get_supported_btrfs_root_fstab_entry�r" r6 r r r �snapshots_supportedy s z$AptBtrfsSnapshot.snapshots_supportedc C s6 | j D ]}|jdkr|jdkrd|jv r| S qdS )z4 return the supported btrfs root FstabEntry or None �/rB zsubvol=@N)r3 r r r rN r r r rM � s �z6AptBtrfsSnapshot._get_supported_btrfs_root_fstab_entryc C s$ | j D ] }|j|kr|j S qdS )z4 return the device or UUID for the given mountpoint N)r3 r r )r" r r3 r6 r r r �_uuid_for_mountpoint� s �z%AptBtrfsSnapshot._uuid_for_mountpointc C s4 | � d�}tjdd�}| j�||�sd S || _| jS )NrP zapt-btrfs-snapshot-mp-)�prefix)rQ �tempfile�mkdtemprK r< rL )r" �uuidr r r r �mount_btrfs_root_volume� s z(AptBtrfsSnapshot.mount_btrfs_root_volumec C s$ | j �| j�}t�| j� d | _|S r )rK rA rL �os�rmdir)r" �resr r r �umount_btrfs_root_volume� s z)AptBtrfsSnapshot.umount_btrfs_root_volumec C s t j �� jdd��td��S )Nr )� microsecond�_)�datetime�now�replace� isoformat�strr$ r r r � _get_now_str� s �z AptBtrfsSnapshot._get_now_strr- c C sr | � � }| �� }tj�|d�}tj�|| j| | �}tj�|�r,ttd�|f � dS | j � ||�}| � � |S )N�@zDINFO: snapshot directory '%s' already exists, not creating duplicateT) rV rb rW �path�join� SNAP_PREFIX�exists�printr\ rK rG rZ )r" �additional_prefix�mp�snap_idrE �targetrY r r r �create_btrfs_root_snapshot� s � �z+AptBtrfsSnapshot.create_btrfs_root_snapshotr c C s� g }|dkr| � � }|st� �d|jv rt� �|dkr t�� }| �� }t�|�D ] }|�| j �rFtj � tj � ||dd��}||k rF|� |� q(| �� |S )z� get the list of available snapshot If "older_then" is given (in unixtime format) it will only include snapshots that are older then the given date) r �noatime�etcr3 )rM r r r �timerV rW �listdirr0 rf rd �getatimere r2 rZ )r" � older_than�resultr6 rj �e�atimer r r � get_btrfs_root_snapshots_list� s$ �z.AptBtrfsSnapshot.get_btrfs_root_snapshots_listc C s t d� t d�| �� �� dS )NzAvailable snapshots:� T)rh re rw r$ r r r �print_btrfs_root_snapshots� s z+AptBtrfsSnapshot.print_btrfs_root_snapshotsc C s> t � � }|�d�s td��t|d d� �}||d d d S )N�dz&Please specify time in days (e.g. 10d)���� �< )rp �endswith� Exception�int)r" �timefmtr^ �daysr r r � _parse_older_than_to_unixtime� s z.AptBtrfsSnapshot._parse_older_than_to_unixtimec C sT | � |�}ztd| � td�| j|d��� W dS ty) tj�d� Y dS w )Nz$Available snapshots older than '%s':rx �rs �6Error: fstab option 'noatime' incompatible with optionFT)r� rh re rw r �sys�stderr�write)r" r� �older_than_unixtimer r r �%print_btrfs_root_snapshots_older_than� s � � �z6AptBtrfsSnapshot.print_btrfs_root_snapshots_older_thanc C sV d}| � |�}z| j|d�D ] }|| �|�M }qW |S ty* tj�d� Y dS w )NTr� r� F)r� rw �delete_snapshotr r� r� r� )r" r� rY r� �snapr r r �%clean_btrfs_root_snapshots_older_than� s �� � �z6AptBtrfsSnapshot.clean_btrfs_root_snapshots_older_thanc C s | � |�}|S r )� set_default)r" � snapshot_namerY r r r �command_set_default� s z$AptBtrfsSnapshot.command_set_defaultTc C s� | � � }tj�||�}tj�|�r@|�d�r@|dkr@tj�|d�}tj�|| j| �� �}t�||� t�||� t d| � nt d� | � � dS )z set new default rc z@Default changed to %s, please reboot for changes to take effect.z_You have selected an invalid snapshot. Please make sure that it exists, and that it is not "@".T) rV rW rd re �isdirr0 � BACKUP_PREFIXrb �renamerh rZ )r" r� �backuprj �new_root� default_rootr r r r� � s" �� �z AptBtrfsSnapshot.set_defaultc C s* | � � }| j�tj�||��}| �� |S r )rV rK rI rW rd re rZ )r" r� rj rY r r r r� s �z AptBtrfsSnapshot.delete_snapshotNr9 )r- )r )T)r r r r& rf r� r# rO rM rQ rV rZ rb rm rw ry r� r� r� r� r� r� r r r r rJ l s( rJ )� __future__r r r] rW r> r� rp rS �distutils.spawnr r r\ r r r r �objectr �listr( r; rJ r r r r �<module> s
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