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From:	Achim Gratz <Stromeko AT nexgo DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: [Bug] tmux 3.2-0
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Date:	Sat, 05 Jun 2021 17:55:42 +0200
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	2021 07:33:27 +0200")
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ASSI writes:
> It _might_ be possible for this particular case that one could open
> /proc/${clientpid}/fd/1 and have it do the right thing.  If so, then the
> call just above that clobbers stdin with the ttyname would probably be
> better off as /proc/${clientpid}/fd/0.

To paraphrase Douglas N. Adams:  If you try that, it will do something that's almost,
but not quite, entirely unlike what you wanted it to do.

--8<---------------cut here---------------start------------->8---
--- origsrc/tmux-3.2/configure.ac       2021-04-13 09:37:43.000000000 +0200
+++ src/tmux-3.2/configure.ac   2021-06-05 11:31:12.985505400 +0200
@@ -1,6 +1,6 @@
 # configure.ac
 
-AC_INIT([tmux], 3.2)
+AC_INIT([tmux], 3.2p1)
 AC_PREREQ([2.60])
 
 AC_CONFIG_AUX_DIR(etc)
--- origsrc/tmux-3.2/server-client.c    2021-06-05 09:29:04.102404100 +0200
+++ src/tmux-3.2/server-client.c        2021-06-05 11:36:50.162975600 +0200
@@ -2269,7 +2269,19 @@ server_client_dispatch_identify(struct c
        log_debug("client %p name is %s", c, c->name);
 
 #ifdef __CYGWIN__
        c->fd = open(c->ttyname, O_RDWR|O_NOCTTY);
+       /* nope
+       c->out_fd = dup(c->fd);
+        */
+       if (0 < c->pid) {
+         /* UNIX domain sockets can't be used to transfer open fd on Cygwin yet */
+         char *fdnstr = NULL;
+         int fdnsz = asprintf(&fdnstr, "/proc/%u/fd/1", c->pid);
+         if (0 < fdnsz) {
+           c->out_fd = open(fdnstr, O_RDWR|O_NOCTTY);
+           free(fdnstr);
+         }
+       }
 #endif
 
        if (c->flags & CLIENT_CONTROL)
--8<---------------cut here---------------end--------------->8---

It actually runs half the tests that way, but the other half hangs up
for unknown reasons.


Regards,
Achim.
-- 
+<[Q+ Matrix-12 WAVE#46+305 Neuron microQkb Andromeda XTk Blofeld]>+

Samples for the Waldorf Blofeld:
http://Synth.Stromeko.net/Downloads.html#BlofeldSamplesExtra

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