ssh terminal on Jaunty doesnt process ctrl-C ctrl-D ctrl-Z and so on

[Riccardo Carlesso]

On Jaunty I do ssh and a ctrl-C doesnt do anything.
The same with ctrl-Z and ctrl-D.

This is very similar to:

https://bugs.launchpad.net/bugs/317948

but to me EVERY common escape character doesnt work.

Another hint.
When I tried to launch a 'watch apachectl configtest' and couldnt ctrlC it, I killed the process from another ssh terminal. My other session is alive but not running.

i connected to a VM after upgrading my ubuntu hardy to JAUNTY.

SHELL=/bin/bash
TERM=xterm-color
SSH_CLIENT=2001:770:18:10:223:32ff:fe98:300d 61766 22
SSH_TTY=/dev/pts/0
USER=root
SSH_AUTH_SOCK=/tmp/ssh-nBBxXl2048/agent.2048
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
MAIL=/var/mail/root
PWD=/etc/apache2/sites-enabled
LANG=en_IE.UTF-8
HISTCONTROL=ignoreboth
HOME=/root
SHLVL=2
LOGNAME=root
SSH_CONNECTION=2001:770:18:10:223:32ff:fe98:300d 61766 2001:770:18:2::c101:db72 22
LESSOPEN=| /usr/bin/lesspipe %s
DISPLAY=localhost:10.0
LESSCLOSE=/usr/bin/lesspipe %s %s
_=/usr/bin/env
OLDPWD=/etc/apache2

oot@deepthought:/etc/apache2/sites-enabled# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu karmic (development branch)
Release: 9.10
Codename: karmic

root@deepthought:/etc/apache2/sites-enabled# uname -a
Linux deepthought 2.6.28-13-server #45-Ubuntu SMP Tue Jun 30 20:51:10 UTC 2009 i686 GNU/Linux

[tib (tipcsi)]

it's been happening only for a few days, i think it must be one of the upgrades but i can't figure out which...
(grep 'configure ' /var/log/dpkg.log* | gzip > /upgrades.gz # see attachment)

ctrl-c/ctrl-z works with csh, it doesn't work with bash
on the console everything works as expected

clients i tried:
- os x stock ssh
- putty
- some java based ssh client

i also use karmic, the kernels i tried it with were:
- vmlinuz-2.6.30-9-server
- vmlinuz-2.6.27-14-server

bash versions i tried:
- 3.2-5ubuntu2 3.2-5ubuntu2
- 3.2-4ubuntu1 3.2-4ubuntu1

$ stty -a # it looks ok
speed 38400 baud; rows 25; columns 156; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; swtch = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc -ixany -imaxbel -iutf8
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase tostop -echoprt echoctl echoke

[tib (tipcsi)]

interesting:

when i do an "invoke-rc.d squid3 start" from an ssh bash login shell squid is "out of control": it can't be stopped or anything (but kill -9'ed)

when i start it with "ssh root@... invoke-rc.d squid3 start" it works alright

basically, nothing i start from an ssh'd bash login shell receives any signals but SIGKILL...

[tib (tipcsi)]

hi Marlon,
i disagree about its being a duplicate of the gnome-terminal case
first, i don't use gnome terminal, i use a mac where copy isn't ctrl-c (it's
cmd-c)
besides, i tried several clients (see the notes i added) and the problem can
be reproduced on each
if you look through my notes you'll see that what changed it was switching
to csh from bash
(one funny thing: the problem sometimes go away, but returns after a reboot)
could you keep it a separate case?
many thanks

On Sat, Aug 1, 2009 at 00:56, Marlon Cisternas Milla <email address hidden>wrote:

> *** This bug is a duplicate of bug 317948 ***
> https://bugs.launchpad.net/bugs/317948
>
> ** This bug has been marked a duplicate of bug 317948
> ctrl+c doesn't interrupt running process
>
> --
> ssh terminal on Jaunty doesnt process ctrl-C ctrl-D ctrl-Z and so on
> https://bugs.launchpad.net/bugs/402973
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in Ubuntu: New
>
> Bug description:
> On Jaunty I do ssh and a ctrl-C doesnt do anything.
> The same with ctrl-Z and ctrl-D.
>
> This is very similar to:
>
> https://bugs.launchpad.net/bugs/317948
>
> but to me EVERY common escape character doesnt work.
>
> Another hint.
> When I tried to launch a 'watch apachectl configtest' and couldnt ctrlC it,
> I killed the process from another ssh terminal. My other session is alive
> but not running.
>
> i connected to a VM after upgrading my ubuntu hardy to JAUNTY.
>
> SHELL=/bin/bash
> TERM=xterm-color
> SSH_CLIENT=2001:770:18:10:223:32ff:fe98:300d 61766 22
> SSH_TTY=/dev/pts/0
> USER=root
> SSH_AUTH_SOCK=/tmp/ssh-nBBxXl2048/agent.2048
>
> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
> MAIL=/var/mail/root
> PWD=/etc/apache2/sites-enabled
> LANG=en_IE.UTF-8
> HISTCONTROL=ignoreboth
> HOME=/root
> SHLVL=2
> LOGNAME=root
> SSH_CONNECTION=2001:770:18:10:223:32ff:fe98:300d 61766
> 2001:770:18:2::c101:db72 22
> LESSOPEN=| /usr/bin/lesspipe %s
> DISPLAY=localhost:10.0
> LESSCLOSE=/usr/bin/lesspipe %s %s
> _=/usr/bin/env
> OLDPWD=/etc/apache2
>
>
> oot@deepthought:/etc/apache2/sites-enabled# lsb_release -a
> No LSB modules are available.
> Distributor ID: Ubuntu
> Description: Ubuntu karmic (development branch)
> Release: 9.10
> Codename: karmic
>
> root@deepthought:/etc/apache2/sites-enabled# uname -a
> Linux deepthought 2.6.28-13-server #45-Ubuntu SMP Tue Jun 30 20:51:10 UTC
> 2009 i686 GNU/Linux
>

[Foo Bar (barfoo)]

I have the same problem on karmic, Ctrl-C is not interrupting, nor do Ctrl-Z work. This machine doesn't have gnome installed. Also, when logging out of my ssh session the forked sshd process becomes a zombie.

[Filipi Vianna (fvianna)]

I have the same problem on karmic, Ctrl-C, Ctrl-Z, Ctrl-D, none of them are working, and I am connecting trought SSH with Xterm to a karmic box.

[Gustavo A. Díaz (gdiaz)]

Same for me guys, since karmic i can't break with ctrl+c in SSH.

Cheers.