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Test running processes.
@var CONCURRENT_PROCESS_TEST_COUNT: The number of concurrent processes to use
to stress-test the spawnProcess API. This value is tuned to a number of
processes which has been determined to stay below various
experimentally-determined limitations of our supported platforms.
Particularly, Windows XP seems to have some undocumented limitations which
cause spurious failures if this value is pushed too high. U{Please see
this ticket for a discussion of how we arrived at its current value.
<http://twistedmatrix.com/trac/ticket/3404>}
@var properEnv: A copy of L{os.environ} which has L{bytes} keys/values on POSIX
platforms and native L{str} keys/values on Windows.
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Simple process protocol for tests purpose.
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Override and disable the dispatch provided by the base class to ensure
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@type signal: C{str}
@ivar signaled: A flag tracking whether the signal has been sent to the
child or not yet. C{False} until it is sent, then C{True}.
@type signaled: C{bool}
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Run a Python process connected to a new instance of this protocol
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When a process terminates with a system exit code set to 1,
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C{processEnded} is called with a L{error.ProcessTerminated} instance
with the C{exitCode} set to L{None} and the C{signal} attribute set to
C{signal.SIGHUP}. C{os.WTERMSIG} can also be used on the C{status}
attribute to extract the signal value.
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Sending the SIGINT signal to a running process interrupts it, and
C{processEnded} is called with a L{error.ProcessTerminated} instance
with the C{exitCode} set to L{None} and the C{signal} attribute set to
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attribute to extract the signal value.
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Sending the SIGKILL signal to a running process interrupts it, and
C{processEnded} is called with a L{error.ProcessTerminated} instance
with the C{exitCode} set to L{None} and the C{signal} attribute set to
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attribute to extract the signal value.
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C{signal.SIGTERM}. C{os.WTERMSIG} can also be used on the C{status}
attribute to extract the signal value.
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@ivar exited: set to True when C{_exit} is called.
@type exited: C{bool}
@ivar O_RDWR: dumb value faking C{os.O_RDWR}.
@type O_RDWR: C{int}
@ivar O_NOCTTY: dumb value faking C{os.O_NOCTTY}.
@type O_NOCTTY: C{int}
@ivar WNOHANG: dumb value faking C{os.WNOHANG}.
@type WNOHANG: C{int}
@ivar raiseFork: if not L{None}, subsequent calls to fork will raise this
object.
@type raiseFork: L{None} or C{Exception}
@ivar raiseExec: if set, subsequent calls to execvpe will raise an error.
@type raiseExec: C{bool}
@ivar fdio: fake file object returned by calls to fdopen.
@type fdio: C{BytesIO} or C{BytesIO}
@ivar actions: hold names of some actions executed by the object, in order
of execution.
@type actions: C{list} of C{str}
@ivar closed: keep track of the file descriptor closed.
@type closed: C{list} of C{int}
@ivar child: whether fork return for the child or the parent.
@type child: C{bool}
@ivar pipeCount: count the number of time that C{os.pipe} has been called.
@type pipeCount: C{int}
@ivar raiseWaitPid: if set, subsequent calls to waitpid will raise
the error specified.
@type raiseWaitPid: L{None} or a class
@ivar waitChild: if set, subsequent calls to waitpid will return it.
@type waitChild: L{None} or a tuple
@ivar euid: the uid returned by the fake C{os.geteuid}
@type euid: C{int}
@ivar egid: the gid returned by the fake C{os.getegid}
@type egid: C{int}
@ivar seteuidCalls: stored results of C{os.seteuid} calls.
@type seteuidCalls: C{list}
@ivar setegidCalls: stored results of C{os.setegid} calls.
@type setegidCalls: C{list}
@ivar path: the path returned by C{os.path.expanduser}.
@type path: C{str}
@ivar raiseKill: if set, subsequent call to kill will raise the error
specified.
@type raiseKill: L{None} or an exception instance.
@ivar readData: data returned by C{os.read}.
@type readData: C{str}
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elsewhere.
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t �d�S )zT
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z MockOS.fstatc C s |dkr t � | _| jS J �)zz
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be tested later via C{self.fdio}.
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C{self.child} is set, or a dumb number.
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@param fd: The file descriptor to read.
@param size: The maximum number of bytes to read.
@return: A fixed C{bytes} buffer.
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C{self.raiseExec} is set.
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elsewhere, and increment C{self.pipeCount}. This is used to uniquify
the result.
r= r� )r� r% r r r! �pipem s z MockOS.pipec C r� )z;
Fake C{os.ttyname}. Return a dumb string.
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raise C{SystemError}.
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Override C{fcntl.ioctl}. Do nothing.
Nr )r r� r� �argr r r! �ioctl� r� z MockOS.ioctlc C r� )z?
Override C{fdesc.setNonBlocking}. Do nothing.
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has exited, save executed action.
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Override C{os.getgid}. Return a dumb number.
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Override L{util.switchUID}. Save the action.
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Override C{pty.openpty}, returning fake file descriptors.
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@param path: The path to change the current directory to.
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Mock C{os.geteuid}, returning C{self.euid} instead.
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Mock C{os.getegid}, returning C{self.egid} instead.
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Mock C{os.seteuid}, store result.
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Mock C{os.setegid}, store result.
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Mock C{pwd.getpwnam}.
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specified.
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Try creating a PTY process with setting its uid: it's almost the same
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L{os.environ} (inherited by every subprocess on Windows) can
contain a UTF-8 string value.
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to test this interactively::
# Add the following lines to a script named
# should_not_open_console.pyw
from twisted.internet import reactor, utils
def write_result(result):
open("output.log", "w").write(repr(result))
reactor.stop()
PING_EXE = r"c:\windows\system32\ping.exe"
d = utils.getProcessOutput(PING_EXE, ["slashdot.org"])
d.addCallbacks(write_result)
reactor.run()
To test this, run::
pythonw.exe should_not_open_console.pyw
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See the Windows API documentation for I{CreateProcess} for further details.
@param appName: The name of the module to be executed
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@param threadAttributes: Pointer to SECURITY_ATTRIBUTES structure or None
@param bInheritHandles: boolean to determine if inheritable handles from this
process are inherited in the new process
@param creationFlags: flags that control priority flags and creation of process.
@param newEnvironment: pointer to new environment block for new process, or None.
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