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: /lib/python3/dist-packages/twisted/application/runner/ [ drwxr-xr-x ]
name : _exit.py
 # -*- test-case-name: twisted.application.runner.test.test_exit -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.

"""
System exit support.
"""

from sys import stdout, stderr, exit as sysexit

from constantly import Values, ValueConstant



def exit(status, message=None):
    """
    Exit the python interpreter with the given status and an optional message.

    @param status: An exit status.
    @type status: L{int} or L{ValueConstant} from L{ExitStatus}.

    @param message: An options message to print.
    @type status: L{str}
    """
    if isinstance(status, ValueConstant):
        code = status.value
    else:
        code = int(status)

    if message:
        if code == 0:
            out = stdout
        else:
            out = stderr
        out.write(message)
        out.write("\n")

    sysexit(code)



try:
    import posix as Status
except ImportError:
    class Status(object):
        """
        Object to hang C{EX_*} values off of as a substitute for L{posix}.
        """
        EX__BASE = 64

        EX_OK          = 0
        EX_USAGE       = EX__BASE
        EX_DATAERR     = EX__BASE + 1
        EX_NOINPUT     = EX__BASE + 2
        EX_NOUSER      = EX__BASE + 3
        EX_NOHOST      = EX__BASE + 4
        EX_UNAVAILABLE = EX__BASE + 5
        EX_SOFTWARE    = EX__BASE + 6
        EX_OSERR       = EX__BASE + 7
        EX_OSFILE      = EX__BASE + 8
        EX_CANTCREAT   = EX__BASE + 9
        EX_IOERR       = EX__BASE + 10
        EX_TEMPFAIL    = EX__BASE + 11
        EX_PROTOCOL    = EX__BASE + 12
        EX_NOPERM      = EX__BASE + 13
        EX_CONFIG      = EX__BASE + 14



class ExitStatus(Values):
    """
    Standard exit status codes for system programs.

    @cvar EX_OK: Successful termination.
    @type EX_OK: L{ValueConstant}

    @cvar EX_USAGE: Command line usage error.
    @type EX_USAGE: L{ValueConstant}

    @cvar EX_DATAERR: Data format error.
    @type EX_DATAERR: L{ValueConstant}

    @cvar EX_NOINPUT: Cannot open input.
    @type EX_NOINPUT: L{ValueConstant}

    @cvar EX_NOUSER: Addressee unknown.
    @type EX_NOUSER: L{ValueConstant}

    @cvar EX_NOHOST: Host name unknown.
    @type EX_NOHOST: L{ValueConstant}

    @cvar EX_UNAVAILABLE: Service unavailable.
    @type EX_UNAVAILABLE: L{ValueConstant}

    @cvar EX_SOFTWARE: Internal software error.
    @type EX_SOFTWARE: L{ValueConstant}

    @cvar EX_OSERR: System error (e.g., can't fork).
    @type EX_OSERR: L{ValueConstant}

    @cvar EX_OSFILE: Critical OS file missing.
    @type EX_OSFILE: L{ValueConstant}

    @cvar EX_CANTCREAT: Can't create (user) output file.
    @type EX_CANTCREAT: L{ValueConstant}

    @cvar EX_IOERR: Input/output error.
    @type EX_IOERR: L{ValueConstant}

    @cvar EX_TEMPFAIL: Temporary failure; the user is invited to retry.
    @type EX_TEMPFAIL: L{ValueConstant}

    @cvar EX_PROTOCOL: Remote error in protocol.
    @type EX_PROTOCOL: L{ValueConstant}

    @cvar EX_NOPERM: Permission denied.
    @type EX_NOPERM: L{ValueConstant}

    @cvar EX_CONFIG: Configuration error.
    @type EX_CONFIG: L{ValueConstant}
    """

    EX_OK          = ValueConstant(Status.EX_OK)
    EX_USAGE       = ValueConstant(Status.EX_USAGE)
    EX_DATAERR     = ValueConstant(Status.EX_DATAERR)
    EX_NOINPUT     = ValueConstant(Status.EX_NOINPUT)
    EX_NOUSER      = ValueConstant(Status.EX_NOUSER)
    EX_NOHOST      = ValueConstant(Status.EX_NOHOST)
    EX_UNAVAILABLE = ValueConstant(Status.EX_UNAVAILABLE)
    EX_SOFTWARE    = ValueConstant(Status.EX_SOFTWARE)
    EX_OSERR       = ValueConstant(Status.EX_OSERR)
    EX_OSFILE      = ValueConstant(Status.EX_OSFILE)
    EX_CANTCREAT   = ValueConstant(Status.EX_CANTCREAT)
    EX_IOERR       = ValueConstant(Status.EX_IOERR)
    EX_TEMPFAIL    = ValueConstant(Status.EX_TEMPFAIL)
    EX_PROTOCOL    = ValueConstant(Status.EX_PROTOCOL)
    EX_NOPERM      = ValueConstant(Status.EX_NOPERM)
    EX_CONFIG      = ValueConstant(Status.EX_CONFIG)