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o � ed� � @ s` d Z ddlZddlZddlZddlZddlZG dd� de�ZG dd� de�Z G dd� de�Z dS ) z Terminal / input handling � Nc @ sV e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zddd�Z ddd�Z ddd�Z d S )�Terminalz@ Do minimal terminal mangling to prompt users for input c C s || _ d | _d | _| �� d S �N)�fd� orig_flags� orig_term�save)�selfr � r �&/usr/share/netplan/netplan/terminal.py�__init__" s zTerminal.__init__c C sT t j�� r(t�| j�}|d tjB |d< |d tjB |d< t�| jtj |� d S d S �N� � �sys�stdin�isatty�termios� tcgetattrr �ICANON�ECHO� tcsetattr�TCSANOW�r �attrsr r r � enable_echo( s �zTerminal.enable_echoc C sX t j�� r*t�| j�}|d tj @ |d< |d tj @ |d< t�| jtj |� d S d S r r r r r r � disable_echo/ s �zTerminal.disable_echoc C s, t � | jt j�}t � | jt j|tjB � d S r ��fcntlr �F_GETFL�F_SETFL�os� O_NONBLOCK�r �flagsr r r �enable_nonblocking_io6 s z Terminal.enable_nonblocking_ioc C s. t � | jt j�}t � | jt j|tj @ � d S r r r" r r r �disable_nonblocking_io: s z Terminal.disable_nonblocking_io�x Nc C s� t d� t� }| �|� | �� | �� |sd}t d�|�� |}|dkrbt d�|tt|���dd� t�t j gg g d� zt j � � }|d krO| � |� t � �W n tyY Y nw |d8 }|dks%| � |� t� �) a� Get a "confirmation" input from the user, for at most (timeout) seconds. Optionally, customize the message to be displayed. timeout -- timeout to wait for input (default 120) message -- optional customized message ("Press ENTER to (message)") raises: InputAccepted -- the user confirmed the changes InputRejected -- the user rejected the changes z%Do you want to keep these settings? z accept the new configurationz&Press ENTER before the timeout to {} r z%Changes will revert in {:>{}} seconds� )�end� � )�print�dictr r r$ �format�len�str�selectr r �read�reset� InputAccepted� TypeError� InputRejected)r �timeout�message�settings� timeout_now�cr r r �get_confirmation_input> s2 � �� z Terminal.get_confirmation_inputc C sV t � | jt j�}d}tj�� rt�| j�}|dur#|�||d�� dS || _ || _ dS )z� Save the terminal's current attributes and flags Optional argument: - dest: if set, save settings to this dict N)r# �term) r r r r r r r r �updater r )r �destr r r r r r p s � z Terminal.savec C sd d}d}|dur|� d�}|� d�}n| j}| j}tj�� r't�| jtj |� t � | jt j |� dS )z� Reset the terminal to its original attributes and flags Optional argument: - orig: if set, reset to settings from this dict Nr< r# ) �getr r r r r r r r � TCSAFLUSHr r )r �origr r r r r r2 � s zTerminal.reset)r& Nr ) �__name__� __module__� __qualname__�__doc__r r r r$ r% r; r r2 r r r r r s 2r c @ � e Zd ZdZdS )r3 z Denotes has accepted inputN�rB rC rD rE r r r r r3 � � r3 c @ rF )r5 z) Denotes that the user has rejected inputNrG r r r r r5 � rH r5 ) rE r r r r0 r �objectr � Exceptionr3 r5 r r r r �<module> s y
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