This has been bugging me for ages, I've finally got a way to reproduce
it! In an X11 terminal emulator:

 sam@local$ ssh host
 sam@host$ echo $COLUMNS
 80
 sam@host$ tail -n 0 -f /var/log/daemon.log
 [now resize the terminal emulator window]
 sam@host$ echo $COLUMNS
 80

It seems the 'window changed size' event never got to the server.
Compare to doing the same locally:

 sam@local$ tail -n 0 -f /var/log/daemon.log
 [now resize the terminal emulator window]
 sam@local$ echo $COLUMNS
 96

This also seems to happen if 'screen' is run on the remote host instead
of tail.

- -- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (530, 'testing'), (520, 'unstable'), (510, 'experimental')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-1-k7
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)

Versions of packages openssh-client depends on:
ii  adduser  3.99                            Add and remove users and groups
ii  debconf  1.5.8                           Debian configuration management sy
ii  dpkg     1.13.22                         package maintenance system for Deb
ii  libc6    2.3.6.ds1-7                     GNU C Library: Shared libraries
ii  libcomer 1.39+1.40-WIP-2006.10.02+dfsg-2 common error description library
ii  libedit2 2.9.cvs.20050518-2.2            BSD editline and history libraries
ii  libkrb53 1.4.4-3                         MIT Kerberos runtime libraries
ii  libncurs 5.5-5                           Shared libraries for terminal hand
ii  libselin 1.32-2                          SELinux shared libraries
ii  libssl0. 0.9.8c-3                        SSL shared libraries
ii  passwd   1:4.0.18.1-5                    change and administer password and
ii  zlib1g   1:1.2.3-13                      compression library - runtime

openssh-client recommends no packages.

- -- no debconf information
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bfeRpevFa3V5glwvBGt635E=
=qDch
-----END PGP SIGNATURE-----

Hi,

This problem is not related to the "checkwinsize" from bash ?
You can read follow in the bash FAQ [1], Section E11 :

«

E11) If I resize my xterm while another program is running, why doesn't
bash notice the change?

This is another issue that deals with job control.

The kernel maintains a notion of a current terminal process group.
Members of this process group (processes whose process group ID is equal
to the current terminal process group ID) receive terminal-generated
signals like SIGWINCH.  (For more details, see the JOB CONTROL section
of the bash man page.)

If a terminal is resized, the kernel sends SIGWINCH to each member of
the terminal's current process group (the `foreground' process group).

When bash is running with job control enabled, each pipeline (which may
be a single command) is run in its own process group, different from
bash's process group.  This foreground process group receives the
SIGWINCH; bash does not.  Bash has no way of knowing that the terminal
has been resized.

There is a `checkwinsize' option, settable with the `shopt' builtin,
that will cause bash to check the window size and adjust its idea of the
terminal's dimensions each time a process stops or exits and returns
control of the terminal to bash.  Enable it with `shopt -s checkwinsize'.

»

I think you can closed this bug open against openssh-client package.

Cheers.

[1] http://tiswww.case.edu/php/chet/bash/FAQ

Hi

This problem is not related to the "checkwinsize" function from bash ?

You can read this in the bash FAQ [1], Section E11 :

«
E11) If I resize my xterm while another program is running, why doesn't
bash notice the change?

This is another issue that deals with job control.

The kernel maintains a notion of a current terminal process group.
Members of this process group (processes whose process group ID is equal
to the current terminal process group ID) receive terminal-generated
signals like SIGWINCH.  (For more details, see the JOB CONTROL section
of the bash man page.)

If a terminal is resized, the kernel sends SIGWINCH to each member of
the terminal's current process group (the `foreground' process group).

When bash is running with job control enabled, each pipeline (which may
be a single command) is run in its own process group, different from
bash's process group.  This foreground process group receives the
SIGWINCH; bash does not.  Bash has no way of knowing that the terminal
has been resized.

There is a `checkwinsize' option, settable with the `shopt' builtin,
that will cause bash to check the window size and adjust its idea of the
terminal's dimensions each time a process stops or exits and returns
control of the terminal to bash.  Enable it with `shopt -s checkwinsize'.
»

I think you can closed this bug open against openssh-client package.

Cheers.

[1] http://tiswww.case.edu/php/chet/bash/FAQ

Salaam,



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