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[FIX] workaround for #14 and #3

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This commit is contained in:
Benedek Racz 2019-11-14 12:45:10 +01:00
parent 3484a98cdc
commit c1e81b3a69
1 changed files with 28 additions and 18 deletions
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38
wexpect.py
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@ -1943,6 +1943,7 @@ class Wtty:
self.__otid = 0
self.__switch = True
self.__childProcess = None
self.__conProcess = None
self.codepage = codepage
self.console = False
self.lastRead = 0
@ -1968,7 +1969,10 @@ class Wtty:
# reached
if childPid:
try:
self.__childProcess = win32api.OpenProcess(win32con.PROCESS_TERMINATE | win32con.PROCESS_QUERY_INFORMATION, False, childPid)
self.__childProcess = win32api.OpenProcess(
win32con.PROCESS_TERMINATE | win32con.PROCESS_QUERY_INFORMATION, False, childPid)
self.__conProcess = win32api.OpenProcess(
win32con.PROCESS_TERMINATE | win32con.PROCESS_QUERY_INFORMATION, False, self.conpid)
except pywintypes.error as e:
if time.time() > ts + self.timeout:
break
@ -2057,10 +2061,16 @@ class Wtty:
if not self.__switch:
return
if attatched:
win32console.FreeConsole()
try:
# No 'attached' check is needed, FreeConsole() can be called multiple times.
win32console.FreeConsole()
# This is the workaround for #14. The #14 will still occure if the child process
# finishes between this `isalive()` check and `AttachConsole(self.conpid)`. (However the
# risk is low.)
if not self.isalive(console=True):
# When child has finished...
raise EOF('End Of File (EOF) in switchTo().')
win32console.AttachConsole(self.conpid)
self.__consin = win32console.GetStdHandle(win32console.STD_INPUT_HANDLE)
self.__consout = self.getConsoleOut()
@ -2308,9 +2318,9 @@ class Wtty:
waits timeout seconds, and writes the string 'None'
to the pipe if no data is available after that time."""
try:
self.switchTo()
try:
while True:
#Wait for child process to be paused
if self.__currentReadCo.Y > maxconsoleY:
@ -2323,25 +2333,21 @@ class Wtty:
self.refreshConsole()
if len(s) != 0:
self.switchBack()
return s
if not self.isalive() or timeout <= 0:
self.switchBack()
return ''
time.sleep(0.001)
end = time.time()
timeout -= end - start
except Exception as e:
# This exception seems faulty EOF exception.
logger.info('Unknown Exception!!!')
except EOF as e:
return ''
finally:
self.switchBack()
raise e
self.switchBack()
return s
raise Exception('Unreachable code...')
def refreshConsole(self):
@ -2439,9 +2445,12 @@ class Wtty:
raise
self.switchBack()
def isalive(self):
def isalive(self, console=False):
"""True if the child is still alive, false otherwise"""
if console:
return win32process.GetExitCodeProcess(self.__conProcess) == win32con.STILL_ACTIVE
else:
return win32process.GetExitCodeProcess(self.__childProcess) == win32con.STILL_ACTIVE
###Broken###
@ -2536,6 +2545,7 @@ class ConsoleReader: # pragma: no cover
log(e, 'consolereader', logdir)
time.sleep(.1)
def handler(self, sig):
log(sig, 'consolereader', logdir)
return False