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https://github.com/pyserial/pyserial/issues/805
https://github.com/pyserial/pyserial/pull/808
From 152f2639c630141b9d23f023178b619751e624a0 Mon Sep 17 00:00:00 2001
From: Alexander von Gluck IV <alex@terarocket.io>
Date: Sun, 24 Aug 2025 20:17:51 -0500
Subject: [PATCH] serial_posix: Fix custom baud rates for glibc >=2.42; solves
#805
* https://sourceware.org/pipermail/libc-alpha/2025-July/168553.html
* Based on changes recommended by JoaoBarioni in #805
* Reverts 0085e1e1d (#519)
---
serial/serialposix.py | 11 ++---------
1 file changed, 2 insertions(+), 9 deletions(-)
diff --git a/serial/serialposix.py b/serial/serialposix.py
index 0464075b..6f843918 100644
--- a/serial/serialposix.py
+++ b/serial/serialposix.py
@@ -430,15 +430,8 @@ def _reconfigure_port(self, force_update=False):
ispeed = ospeed = self.BAUDRATE_CONSTANTS[self._baudrate]
except KeyError:
#~ raise ValueError('Invalid baud rate: %r' % self._baudrate)
-
- # See if BOTHER is defined for this platform; if it is, use
- # this for a speed not defined in the baudrate constants list.
- try:
- ispeed = ospeed = BOTHER
- except NameError:
- # may need custom baud rate, it isn't in our list.
- ispeed = ospeed = getattr(termios, 'B38400')
-
+ # Use safe placeholder for tcsetattr(), try to set special baudrate later
+ ispeed = ospeed = termios.B38400
try:
custom_baud = int(self._baudrate) # store for later
except ValueError:
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