Hey list,
I recently upgraded tmux to its latest git master tip. I am starting my
tmux server by using "tmux start-server" with my configuration file
starting the server's initial session (a couple of shells, mostly).
After attaching, none of the shells have a DISPLAY environment variable
set. "tmux show-environment -g" and "tmux show-environment" both have
this variable set, and indeed, it *is* set in the process that spawns
the start-server call.
So, I've taken a look at tmux's revision history. Bisecting isn't quite
as easy as one might think, since you can only build commits on the
master branch of the portable version of the program. But I still think
I could narrow it down to a single change set:
* commit c67b7025882ee6bc2b3d5112dbc630c191f1fa2a
|\ Merge: 3d8efdf ddc4512
| | Author: Thomas Adam <[email protected]>
| | Date: Sun Oct 16 20:01:10 2016 +0100
| |
| | Merge branch 'obsd-master'
| |
| * commit ddc4512d2e0eda6c705e002cb5dbf80719d709e1
| | Author: nicm <nicm>
| | Date: Sun Oct 16 17:55:14 2016 +0000
| |
| | Rewrite command queue handling. [...]
| |
* | commit 3d8efdf310f475a6b9ed83814182c966de2bdab3
|\ Merge: a15939b bfe14b5
| | Author: Thomas Adam <[email protected]>
| | Date: Sun Oct 16 02:01:11 2016 +0100
| |
| | Merge branch 'obsd-master'
Building c67b7025 shows the faulty behavior, while 3d8efdf31 is fine,
which suggests that ddc4512d2e0 is the change set that introduces the
breakage.
Here is my recipe for reproducing the issue: With a file "foobar"
containing this: "new-session -d -s misc", I am doing this with each
build:
% echo $DISPLAY
:0
% git checkout c67b7025
% ./autogen.sh && ./configure && make
% ./tmux -f ~/foobar -L test start-server
% ./tmux -L test attach-session
[..in that session..]
% echo $DISPLAY
% exit
[..this closes the server, back to the parent shell..]
% git checkout 3d8efdf31
[..repeat recipe with this state..]
In the c67b7025 build's session, $DISPLAY is unset, while in the
3d8efdf31 build, it is set to ":0".
Unfortunately, ddc4512 is a rather substantial change set, which I've
skimmed through, but I can't quite tell what in it might cause this. I
am sure Nicholas or Thomas will have an easier time. :)
Regards, Frank
--
In protocol design, perfection has been reached not when there is
nothing left to add, but when there is nothing left to take away.
-- RFC 1925
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