CentOS-6.6
tmux-1.6 (epel)
Twice now I have experienced the situation where upon exiting from a tmux
initiated session on a remote host instead of returning to the originating
session I see this in the session terminal display:
<pre>
????????????????????????????????????????????????????????????????????????????????
?????????????????????????????????<infinite>?????????????????????????????????????
. . .
<infinite lines of dots>
. . .
?????????????????????????????????<infinite>?????????????????????????????????????
????????????????????????????????????????????????????????????????????????????????
<pre>
If I resize the terminal window then the dots expand to fill the available
display. The scroll-back is not affected. I am unable to regain control of
that terminal session from within the session itself.
Looking at the processes runnin on that host from a direct ssh session shows
this:
<pre>
# ps -ef | grep ssh
root 1502 1 0 Dec12 ? 00:00:06 /usr/sbin/sshd
root 10798 1502 0 10:00 ? 00:00:09 sshd: root at pts/0
root 13015 10810 0 10:12 pts/1 00:00:08 ssh inet07 -t -Y tmux ||
/bin/bash
root 13017 1502 0 10:12 ? 00:00:08 sshd: root at pts/2
root 15622 1502 0 10:45 ? 00:00:00 sshd: root
root 16033 1502 1 10:47 ? 00:00:00 sshd: root at pts/3
root 16099 16038 3 10:48 pts/3 00:00:00 grep ssh
[root at inet07 ~]# ps -ef | grep 10810
root 10810 10809 0 10:00 pts/1 00:00:00 -bash
root 13015 10810 0 10:12 pts/1 00:00:08 ssh inet07 -t -Y tmux ||
/bin/bash
root 16113 16038 0 10:48 pts/3 00:00:00 grep 10810
[root at inet07 ~]# ps -ef | grep 10809
root 10809 1 0 10:00 ? 00:00:03 tmux
root 10810 10809 0 10:00 pts/1 00:00:00 -bash
root 16115 16038 3 10:48 pts/3 00:00:00 grep 10809
</pre>
pts/3 is the diect ssh connection. pts/1 appears to be the tmux session
instigated from the ssh login pts/2. I am guessing that the problem is
somewhere in the shutdown of pts/1.
If I kill 13015 (pts/1) from the direct ssh connection then I return control
of the tmux session back to the terminal and I remain logged on to the remote
host. If I then exit the remote host I return to the original host as
expected.
Tmux is called from the original session using a function named sshtn as
defined below:
# declare -f
sshta ()
{
ssh "$*" -t -Y 'tmux a || tmux || /bin/bash'
}
sshtn ()
{
ssh "$*" -t -Y 'tmux || /bin/bash'
}
Anyone have any ideas on what might be causing this; and is there any way of
preventing it? In this instance I had opened an X-Window application (gvim)
in the remote tmux instance and had subsequently shut that down prior to
exiting. Nonetheless, I am wondering if that has anything to do with the
situation.
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB at Harte-Lyne.ca
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
