SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

kokoko3k · 2015-07-24 06:50:52

Just installed a minimal system on an vmware ESXi host, there is no much installed, apart from the base packages, there is just an ssh server and network-ups-tools.
All is working fine, except for an irritating thing that happens then i hit ctrl-c in the shell.
As i'm used to, when i hit ctrl-c on a command line with no program running, it prints "^C" and goes to the next line:

Gozer ~ # ls -la /tmp^C
Gozer ~ #

...but sometimes, for no apparent reason, this won't work, and randomly, it starts to acts this way:

[root@arch_ups ~]# ls -la /tmp

hi just hit ctrl-c, but nothing happened.
indeed, if i continue to type ignoring the fact that i am on the same line:

[root@arch_ups ~]# ls -la /tmpls /var
cache  db  empty  games  lib  local  lock  log  mail  opt  run  spool  state  tmp

So, Ctrl-C has worked, but it just wont display the newline.
...bash executed "ls /var"

The most irritating thing is that i'm unable to find a way to trigger the problem.
I *think* i reproduced the problem with bash and zsh from konsole and xterm.

Any idea what's going on?

-EDIT-
It does not happens in the local console, but happens over ssh.
i was able to reproduce it by hitting ctrl-c multiple times:

[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C
[root@arch_ups ~]# ^C

...after some seconds, it stops to print "^C"

Last edited by kokoko3k (2015-07-24 12:34:44)

Malkymder · 2015-07-24 12:38:41

post ouptput of this command please

stty -a | grep intr

Should output something like this, with more test after the semi-colon

intr = ^C;

this might fix it if it does not

stty sane

edit:fixed typo

Last edited by Malkymder (2015-07-24 12:39:18)

kokoko3k · 2015-07-24 13:23:10

Thanks, but no luck:

[root@arch_ups ~]# stty -a | grep intr
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;

Scimmia · 2015-07-24 13:27:32

You're not the only one seeing this.
https://bugs.archlinux.org/task/45629

kokoko3k · 2015-07-24 15:40:27

So maybe is an issue limited to virtualizated environments, thanks for pointing it out.

leniviy · 2015-07-25 08:23:35

kokoko3k wrote:

So maybe is an issue limited to virtualizated environments, thanks for pointing it out.

How many virtual cpus do you have? Can you try with more than one?

Arch Linux

#1 2015-07-24 06:50:52

SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

#2 2015-07-24 12:38:41

Re: SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

#3 2015-07-24 13:23:10

Re: SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

#4 2015-07-24 13:27:32

Re: SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

#5 2015-07-24 15:40:27

Re: SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

#6 2015-07-25 08:23:35

Re: SSH: CTRL-C in the terminal, no "^C", no newline... randomly.

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