Package: tmux
Version: 1.3-1
Severity: normal
When tmux is used with csh/tcsh on Debian, the initial values of
the COLUMNS and LINES environment variables leak into tmux' global
environment, and therefore into the environment of each new window
in the session.
Every terminal application that relies on these variables (mutt
being an example) will have a garbled display when being started
after the terminal has been resized from it's original size.
The bug was previously filed as 602674, before I understood why the
problem occurs.
Reproduction:
A user with csh or tcsh as login shell starts tmux and resizes the
terminal. All new tmux windows will have the original COLUMNS and
LINES values from before resizing the terminal in their environment.
The original values show up when running "tmux show-environment -g".
Workaround:
Both /etc/csh.cshrc and /etc/csh.login on Debian contain the following
two statements:
setenv COLUMNS
setenv LINES
When these lines are removed, the COLUMNS and LINES variables disappear
from tmux' global environment and everything works as expected.
While it's possible to change the shell rc and login files, I think
something in the line of blacklisting these variables from tmux's
global environment would be a more thorough solution.
-- System Information:
Debian Release: squeeze/sid
APT prefers testing
APT policy: (500, 'testing')
Architecture: i386 (i686)
Kernel: Linux 2.6.32.23-grsec (SMP w/4 CPU cores)
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)
Shell: /bin/sh linked to /bin/dash
Versions of packages tmux depends on:
ii libc6 2.11.2-7 Embedded GNU C Library: Shared lib
ii libevent-1.4-2 1.4.13-stable-1 An asynchronous event notification
ii libncurses5 5.7+20100313-4 shared libraries for terminal hand
tmux recommends no packages.
tmux suggests no packages.
-- no debconf information
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