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gZ e� dej �Z dd� Z!dd� Z"dd� Z#G dd� de$�Z%dd� Z&dd� Z'G dd � d e$�Z(g d �Z)G d d � d ej*�Z+d d!� Z,d"d#� Z-G d$d%� d%e$�Z.d&d'� Z/dS )(aR command server extension for cHg
'S' channel (read/write)
propagate ui.system() request to client
'attachio' command
attach client's stdio passed by sendmsg()
'chdir' command
change current directory
'setenv' command
replace os.environ completely
'setumask' command (DEPRECATED)
'setumask2' command
set umask
'validate' command
reload the config and check if the server is up to date
Config
------
::
[chgserver]
# how long (in seconds) should an idle chg server exit
idletimeout = 3600
# whether to skip config or env change checks
skiphash = False
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tj�D �}tt |��}|dd� |dd� S )a� return a quick hash for detecting config/env changes
confighash is the hash of sensitive config items and environment variables.
for chgserver, it is designed that once confighash changes, the server is
not qualified to serve its client and should redirect the client to a new
server. different from mtimehash, confighash change will not mark the
server outdated and exit since the user can have different configs at the
same time.
s CHGHGs HGc s* g | ]"\}}t �|�r|� vr||f�qS r )�_envre�match��.0�k�v�Zignoredr r �
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y� Y q\0 q\t t |��S )z�get a list of paths that should be checked to detect change
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c S s g | ] \}}|�qS r r )r �n�mr r r r � � z"_getmtimepaths.<locals>.<listcomp>r )� __version__)
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mtimehash calls stat on given paths and calculate a hash based on size and
mtime of each file. mtimehash does not read file content because reading is
expensive. therefore it's not 100% reliable for detecting content changes.
it's possible to return different hashes for same file contents.
it's also possible to return a same hash for different file contents for
some carefully crafted situation.
for chgserver, it is designed that once mtimehash changes, the server is
considered outdated immediately and should no longer provide service.
mtimehash is not included in confighash because we only know the paths of
extensions after importing them (there is imp.find_module but that faces
race conditions). We need to calculate confighash without importing.
c S s4 z t �| �}|tj |jfW S ty. Y n0 d S �N)�os�stat�ST_MTIME�st_size�OSError)�path�str r r �trystat� s
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_mtimehash� s rB c @ s& e Zd ZdZdd� Zeddd��ZdS )� hashstatezCa structure storing confighash, mtimehash, paths used for mtimehashc C s || _ || _|| _d S r7 )�
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mtimepaths)�selfrD rE rF r r r �__init__� s zhashstate.__init__Nc C s< |d u rt | �}t| �}t|�}| �dd||� t|||�S )Ns cmdservers confighash = %s mtimehash = %s
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dt�|�� | j�d�|��p�d� dS )a� Reload the config and check if the server is up to date
Read a list of ' ' separated arguments.
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if the list is empty.
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- "unlink $path", the client should unlink the path to stop the
outdated server.
- "redirect $path", the client should attempt to connect to $path
first. If it does not work, start a new server. It implies
"reconnect".
- "exit $n", the client should exit directly with code n.
This may happen if we cannot parse the config.
- "reconnect", the client should close the connection and
reconnect.
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list, the client can continue with this server after completing all
the instructions.
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Z tryunlinkr� r� r r r � unlinksocket� s z"chgunixservicehandler.unlinksocketc C sH | � � s | j�dd| j� dS t�� | j | jkrD| j�dd� dS dS )Nr� s %s is not owned, exiting.
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