U  W[S@sdZddlZddlmZmZmZddlmZm Z ddl m Z GdddeZ e e Gdd d e Ze e Gd d d e ZeZGd d d eZGdddeZGdddeZGdddeZdS)z PID file. N)getpidkillname) Interface implementer)Loggerc@s@eZdZdZddZddZddZdd Zd d Zd d Z dS)IPIDFilez5 Manages a file that remembers a process ID. cCsdS)aB Read the process ID stored in this PID file. @return: The contained process ID. @rtype: L{int} @raise NoPIDFound: If this PID file does not exist. @raise EnvironmentError: If this PID file cannot be read. @raise ValueError: If this PID file's content is invalid. Nr r r E/usr/lib/python3/dist-packages/twisted/application/runner/_pidfile.pyreadsz IPIDFile.readcCsdS)z Store the PID of the current process in this PID file. @raise EnvironmentError: If this PID file cannot be written. Nr r r r r writeRunningPID$szIPIDFile.writeRunningPIDcCsdS)zm Remove this PID file. @raise EnvironmentError: If this PID file cannot be removed. Nr r r r r remove,szIPIDFile.removecCsdS)a' Determine whether there is a running process corresponding to the PID in this PID file. @return: True if this PID file contains a PID and a process with that PID is currently running; false otherwise. @rtype: L{bool} @raise EnvironmentError: If this PID file cannot be read. @raise InvalidPIDFileError: If this PID file's content is invalid. @raise StalePIDFileError: If this PID file's content refers to a PID for which there is no corresponding running process. Nr r r r r isRunning4szIPIDFile.isRunningcCsdS)z Enter a context using this PIDFile. Writes the PID file with the PID of the running process. @raise AlreadyRunningError: A process corresponding to the PID in this PID file is already running. Nr r r r r __enter__DszIPIDFile.__enter__cCsdS)zS Exit a context using this PIDFile. Removes the PID file. Nr )excTypeexcValue tracebackr r r __exit__OszIPIDFile.__exit__N) __name__ __module__ __qualname____doc__r r r rrrr r r r rs  rc@sneZdZdZeZeddZddZddZ dd Z d d Z d d Z ddZ eddZddZddZdS)PIDFilez Concrete implementation of L{IPIDFile} based on C{IFilePath}. This implementation is presently not supported on non-POSIX platforms. Specifically, calling L{PIDFile.isRunning} will raise L{NotImplementedError}. cCsdt|dS)z Format a PID file's content. @param pid: A process ID. @type pid: int @return: Formatted PID file contents. @rtype: L{bytes} z{} zutf-8)formatintencodepidr r r _formates zPIDFile._formatcCs ||_dS)zi @param filePath: The path to the PID file on disk. @type filePath: L{IFilePath} N)filePath)selfrr r r __init__sszPIDFile.__init__c Csd}z(|j}|D]}q qW5QRXWn8tk rd}z|jtjkrRtdW5d}~XYnXz t|WStk rtd |YnXdS)NPID file does not existz'non-integer PID value in PID file: {!r}) ropenOSErrorerrnoENOENT NoPIDFoundr ValueErrorInvalidPIDFileErrorr)r Z pidStringZfher r r r {s   z PIDFile.readcCs|j|j|ddS)z Store a PID in this PID file. @param pid: A PID to store. @type pid: L{int} @raise EnvironmentError: If this PID file cannot be written. rN)rZ setContentrr rr r r _writes zPIDFile._writecCs|tdSN)r-rr r r r r szPIDFile.writeRunningPIDcCs|jdSr.)rr r/r r r r szPIDFile.removecCsHz |}Wntk r"YdSXtdkr6||StdtdS)NFposixz"isRunning is not implemented on {})r r( SYSTEM_NAME_pidIsRunningPOSIXNotImplementedErrorrr,r r r rs  zPIDFile.isRunningc Cshzt|dWnPtk r^}z2|jtjkr6tdn|jtjkrLWY dSW5d}~XYnXdSdS)a" POSIX implementation for running process check. Determine whether there is a running process corresponding to the given PID. @return: True if the given PID is currently running; false otherwise. @rtype: L{bool} @raise EnvironmentError: If this PID file cannot be read. @raise InvalidPIDFileError: If this PID file's content is invalid. @raise StalePIDFileError: If this PID file's content refers to a PID for which there is no corresponding running process. rz'PID file refers to non-existing processTN)rr%r&ZESRCHStalePIDFileErrorEPERM)rr+r r r r2s   zPIDFile._pidIsRunningPOSIXcCs@z|rtWn tk r2|jdYnX||S)Nz&Replacing stale PID file: {log_source})rAlreadyRunningErrorr4_loginfor r/r r r rs zPIDFile.__enter__cCs |dSr.)r r rrrr r r rszPIDFile.__exit__N)rrrrrr7 staticmethodrr!r r-r r rr2rrr r r r rXs    rc@sPeZdZdZddZddZddZdd Zd d Zd d Z ddZ ddZ dS) NonePIDFilez PID file implementation that does nothing. This is meant to be used as a "active None" object in place of a PID file when no PID file is desired. cCsdSr.r r/r r r r!szNonePIDFile.__init__cCs tddS)Nr#)r(r/r r r r szNonePIDFile.readcCsttjddS)z Store a PID in this PID file. @param pid: A PID to store. @type pid: L{int} @raise EnvironmentError: If this PID file cannot be written. @note: This implementation always raises an L{EnvironmentError}. zOperation not permittedN)r%r&r5r,r r r r-s zNonePIDFile._writecCs|ddS)Nr)r-r/r r r r szNonePIDFile.writeRunningPIDcCsttjddS)NzNo such file or directory)r%r&r'r/r r r r szNonePIDFile.removecCsdS)NFr r/r r r rszNonePIDFile.isRunningcCs|Sr.r r/r r r r szNonePIDFile.__enter__cCsdSr.r r9r r r r szNonePIDFile.__exit__N) rrrrr!r r-r r rrrr r r r r;sr;c@seZdZdZdS)r6z% Process is already running. Nrrrrr r r r r6sr6c@seZdZdZdS)r*z( PID file contents are invalid. Nr<r r r r r*sr*c@seZdZdZdS)r4z[ PID file contents are valid, but there is no process with the referenced PID. Nr<r r r r r4$sr4c@seZdZdZdS)r(z# No PID found in PID file. Nr<r r r r r(,sr()rr&osrrrr1Zzope.interfacerrZtwisted.loggerrrobjectrr;Z nonePIDFile Exceptionr6r*r4r(r r r r s F3