def start(self):
"""
Reimplements Executor and SimpleExecutor start to allow setting stdin/stdout/stderr/cwd
It may break input/output/communicate, but will ensure child output redirects won't
break parent process by filling the PIPE.
Also, catches ProcessExitedWithError and raise FileNotFoundError if exitcode was 127
"""
if self.pre_start_check():
# Some other executor (or process) is running with same config:
raise AlreadyRunning(self)
if self.process is None:
command = self.command
if not self._shell:
command = self.command_parts
if isinstance(self.stdio, (list, tuple)):
stdin, stdout, stderr = self.stdio
else:
stdin = stdout = stderr = self.stdio
env = os.environ.copy()
env[ENV_UUID] = self._uuid
popen_kwargs = {
'shell': self._shell,
'stdin': stdin,
'stdout': stdout,
'stderr': stderr,
'universal_newlines': True,
'env': env,
'cwd': self.cwd,
}
if platform.system() != 'Windows':
popen_kwargs['preexec_fn'] = os.setsid
self.process = subprocess.Popen(
command,
**popen_kwargs,
)
self._set_timeout()
try:
self.wait_for(self.check_subprocess)
except ProcessExitedWithError as e:
if e.exit_code == 127:
raise FileNotFoundError(
f'Can not execute {command!r}, check that the executable exists.',
) from e
else:
output_file_names = {
io.name
for io in (stdout, stderr) if hasattr(io, 'name')
}
if output_file_names:
log.warning('Process output file(s)',
output_files=output_file_names)
raise
return self
def start(self):
"""
Start executor with additional checks.
Checks if previous executor isn't running then start process
(executor) and wait until it's started.
"""
if self.pre_start_check():
# Executor or other process is running with same config.
raise AlreadyRunning(self)
super(StartCheckExecutor, self).start()
self.wait_for(self.after_start_check)
def start(self):
"""
Start executor with additional checks.
Checks if previous executor isn't running then start process
(executor) and wait until it's started.
"""
if self.pre_start_check():
# Some other executor (or process) is running with same config:
raise AlreadyRunning(self)
super(Executor, self).start()
self.wait_for(self.check_subprocess)