Gentoo Archives: gentoo-user

From: Paul Hartman <paul.hartman+gentoo@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Ctrl+C not working over ssh?
Date: Tue, 24 May 2011 23:00:39
Message-Id: BANLkTikAxB_dpYKzObjumo6P3qtFbdaBVA@mail.gmail.com
In Reply to: Re: [gentoo-user] Ctrl+C not working over ssh? by Andy Wilkinson
1 On Tue, May 24, 2011 at 5:29 PM, Andy Wilkinson <drukargin@×××××.com> wrote:
2 > On 05/24/2011 12:38 PM, Todd Goodman wrote:
3 >>
4 >> * Andy Wilkinson<drukargin@×××××.com>  [110524 12:24]:
5 >>>
6 >>> I can't say for sure when this started, as I have gone a while without
7 >>> accessing my computer remotely much, but perhaps since my last upgrade
8 >>> (which may have included openrc), ctrl-c doesn't work over ssh.  I have
9 >>> tested this from multiple workstations and even my droid, using
10 >>> different terminal emulators, and have got consistent results.
11 >>>
12 >>> I'm not even sure where to start looking.  Googling didn't find me much
13 >>> (at least, not much that's current at all; 5 year-old ubuntu bugs aren't
14 >>> very useful), and I'm not sure at all what might be causing this.  Could
15 >>> anyone here point me to something that might be causing this?
16 >>>
17 >>> Thanks,
18 >>>
19 >>> -Andy
20 >>
21 >> I don't have any problems.  What does 'stty -a' show for the intr= bit?
22 >>
23 >> Todd
24 >>
25 > $ stty -a
26 > speed 38400 baud; rows 23; columns 80; line = 0;
27 > intr = ^C; ...
28 >
29 > Which looks right, but when I try to use Ctrl-C, this happens:
30 >
31 > $ ping localhost
32 > PING localhost (127.0.0.1) 56(84) bytes of data.
33 > 64 bytes from localhost (127.0.0.1): icmp_req=1 ttl=64 time=0.037 ms
34 > ^C64 bytes from localhost (127.0.0.1): icmp_req=2 ttl=64 time=0.032 ms
35 > ^C^C^C64 bytes from localhost (127.0.0.1): icmp_req=3 ttl=64 time=0.032 ms
36 > ^C^C^C^C^C^C64 bytes from localhost (127.0.0.1): icmp_req=4 ttl=64
37 > time=0.034 ms
38 > ^C^C^C^C^C^C64 bytes from localhost (127.0.0.1): icmp_req=5 ttl=64
39 > time=0.032 ms
40 > ^Z
41 >
42 > This does NOT happen locally: from a console or terminal at the machine, I
43 > can interrupt just fine.  Ctrl-Z does//work over ssh.
44
45 That's so strange...
46
47 I'm curious, if you open another terminal and issue SIGINT to that
48 process (using kill), does it work? I think it should be the
49 equivalent to hitting ctrl-c interactively.
50
51 "trap" command can be used in scripts to block certain signals... I
52 wonder if your profile/bashrc/or something has a trap entry. But if
53 that's the case I would guess that the same problem would happen
54 locally, and not only remotely (unless remote session uses a different
55 shell or something). Just a W.A.G. :)