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gcode: Only write to the gcode pseudo-tty if it appears to be active 

If there isn't a reader of the output pipe it can lead to the
generation of a large number of errors.  Only attempt to write if it
appears the pipe is active.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2020-08-04 14:42:07 -04:00
parent 8a69e5d596
commit 8ed1696624
1 changed files with 11 additions and 8 deletions
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19
klippy/gcode.py
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@ -83,6 +83,7 @@ class GCodeParser:
self.reactor = printer.get_reactor()
self.is_processing_data = False
self.is_fileinput = not not printer.get_start_args().get("debuginput")
self.pipe_is_active = not self.is_fileinput
self.fd_handle = None
if not self.is_fileinput:
self.fd_handle = self.reactor.register_fd(self.fd,
@ -328,8 +329,10 @@ class GCodeParser:
self.partial_input = lines.pop()
pending_commands = self.pending_commands
pending_commands.extend(lines)
# Special handling for debug file input EOF
if not data and self.is_fileinput:
if not self.is_fileinput:
self.pipe_is_active = True
elif not data:
# Special handling for debug file input EOF
if not self.is_processing_data:
self.reactor.unregister_fd(self.fd_handle)
self.fd_handle = None
@ -387,12 +390,12 @@ class GCodeParser:
return GCodeCommand(self, command, commandline, params, False)
# Response handling
def respond_raw(self, msg):
if self.is_fileinput:
return
try:
os.write(self.fd, msg+"\n")
except os.error:
logging.exception("Write g-code response")
if self.pipe_is_active:
try:
os.write(self.fd, msg+"\n")
except os.error:
logging.exception("Write g-code response")
self.pipe_is_active = False
def respond_info(self, msg, log=True):
if log:
logging.info(msg)