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Trying new method to get unbuffered stdin

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This commit is contained in:
Sam Colwell 2019-02-09 13:04:30 -05:00
parent 3a0fe6b33d
commit 0c78f33b43
2 changed files with 28 additions and 3 deletions
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27
py65/monitor.py
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@ -53,7 +53,32 @@ class Monitor(cmd.Cmd):
self._width = 78
self.prompt = "."
self._add_shortcuts()
cmd.Cmd.__init__(self, stdin=stdin, stdout=stdout)
# Attempt to get a copy of stdin that is unbuffered.
# This allows for immediate response to typed input as well as
# pasted input. If unable to get an unbuffered version of
# stdin, use the original version.
if stdin != None:
try:
# Reopen stdin with no buffer.
self.unbuffered_stdin = os.fdopen(stdin.fileno(), 'rb', 0)
except Exception as e:
print(e)
# Unable to reopen this file handle with no buffer.
# Just use the original file handle.
print("Error opening unbuffered stdin - using buffered version")
self.unbuffered_stdin = stdin
else:
# If stdin is None, try using sys.stdin for input.
try:
# Reopen the system's stdin with no buffer.
self.unbuffered_stdin = os.fdopen(sys.stdin.fileno(), 'rb', 0)
except Exception as e:
print(e)
print("Error opening default unbuffered stdin - using buffered version")
self.unbuffered_stdin = None
cmd.Cmd.__init__(self, stdin=self.unbuffered_stdin, stdout=stdout)
# Save the current input mode so it can be restored after
# after processing commands and before exiting.

4
py65/utils/console.py
View File

@ -80,9 +80,9 @@ else:
newattr = currentattr[:]
newattr[3] &= ~termios.ICANON & ~termios.ECHO
# Switch to non-blocking reads with 0.1 second timeout.
# Switch to non-blocking reads with no timeout.
newattr[6][termios.VMIN] = 0
newattr[6][termios.VTIME] = 1
newattr[6][termios.VTIME] = 0
termios.tcsetattr(fd, termios.TCSANOW, newattr)
except:
# Quietly ignore termios errors, such as stdin not being