TZUTC: -0800
MSGID: 53844.syncprog@1:103/705 2dbaf9ae
PID: Synchronet 3.21a-Linux master/48922a15c Dec 17 2025 GCC 12.2.0
TID: SBBSecho 3.34-Linux master/8bb133aa7 Dec 30 2025 GCC 12.2.0
BBSID: VERT
CHRS: ASCII 1
FORMAT: flowed
https://gitlab.synchro.net/main/sbbs/-/commit/70480dcee4378c21be0ca536
Modified Files:
	src/sbbs3/main.cpp
Log Message:
Add some passthru thread debug log messages

To hopefully help identify the cause of issue #1038

The theory being that the client socket was disconnected while running an
external program (sexyz in this case) and this check at the end of external()
(the *nix version) might have a race condition with the passthru thread
terminating due to disconnection as well:
		if (!(mode & EX_STDIN)) {
			if (passthru_thread_running)
				passthru_socket_activate(false);
			else
				pthread_mutex_unlock(&input_thread_mutex);
		}
in which case it would try to unlock the input_thread_mutex that it did not
own. I'm not clear why that would cause the pthread_mutex_destroy() call to
fail (on input_thread_mutex) but maybe it does.
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