class ProcManager (object):
_BUFSIZE = 2**16
@property
def readables(self):
return (self._proc.stdout, self._proc.stderr)
def __init__(self,
outstream,
args,
tmpl=DefaultTemplate,
params=None,
_popen=subprocess.Popen,
_gettime=time.gmtime,
):
self._gettime = _gettime
self._starttime = time.mktime(_gettime())
self._proc = _popen(
args,
shell=False,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
self._ps = ProcStream(
outstream,
self._proc.pid,
tmpl,
params,
_gettime=_gettime)
self._writers = {
self._proc.stdout: self._ps.out,
self._proc.stderr: self._ps.err,
}
self._ps.info('Launched with args: %r', args)
def handle_read(self, f):
writer = self._writers[f]
chunk = f.read(self._BUFSIZE)
if len(chunk) > 0:
writer.write(chunk)
return True
else:
return False
def check_closed(self):
rc = self._proc.poll()
if rc is None:
return None
self._ps.flush()
if os.WIFSTOPPED(rc):
self._ps.info('Process stopped with signal: %r',
os.WSTOPSIG(rc))
elif os.WIFCONTINUED(rc):
self._ps.info('Process continued. (status: %x)',
rc)
elif os.WIFSIGNALED(rc):
self._ps.info('Process exited due to signal: %r',
os.WTERMSIG(rc))
elif os.WIFEXITED(rc):
self._ps.info('Process exited with status: %r',
os.WEXITSTATUS(rc))
else:
self._ps.info('Error; unknown exit status: %r',
rc)
endtime = time.mktime(self._gettime())
self._ps.info('Wall clock time: %.3f', endtime - self._starttime)
self._ps.close()
return rc
