Actually, to fake a Ctrl-C command, I just have to send the ETX letter.
(Number 3 in ASCII)
Regards,
Samuel.
Le mardi 08 décembre 2009 à 04:10 +0100, Peter Stuge a écrit :
> Samuel ROZE wrote:
> > But, if you type "sleep 10;" and then make a Ctrl + C, this will
> > print "^C" and then allow you to type another command while
> > cancelling this sleep command.
> >
> > If I send to my ssh2 channel an "sleep 1000;" command for instance,
> > how I can send the ^C command ?
>
> Ctrl-C is not interpreted by the shell. There is a lot of code
> executing to translate every keypress between the time you press the
> key, and the time it reaches your shell.
>
> Ctrl-C is interpreted by the terminal handler on the server. Again,
> please now investigate how terminal emulation and terminal handling
> works in Linux/UNIX. For Ctrl-C, the handler translates the keypress
> into the POSIX signal SIGTERM, and sends the signal to the process
> that is the session master for that virtual terminal (sleep) which
> will then either catch the signal and do something implementation
> specific as a result, or the default signal handler for SIGTERM will
> be run, which exits the program. Please read more about signals.
>
> SSH2 supports sending signals to channels, but this is not
> implemented neither in libssh2 nor in OpenSSH so in practice it
> cannot be done at this time. I believe there are patches for both
> packages, but so far they have not been merged.
>
>
> //Peter
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Received on 2009-12-29