[Konsole-devel] [Bug 105824] ctrl-d doesn't always work

[Lars Doelle]

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http://bugs.kde.org/show_bug.cgi?id=105824         




------- Additional Comments From lars.doelle on-line de  2006-07-05 02:11 -------
> It is unlikely to get fixed unless there is someone to reproduce it...   


The problem is unlikely to be caused by the konsole.  It is not the
konsole, that treats the ctrl-d different, but the client (program) resp.
the program in connection with the line discipline.

Citing man:termios
-----
       VEOF   (004,  EOT, Ctrl-D) End-of-file character.  More precisely: this character causes the pending tty buffer to be sent to the waiting user pro-
              gram without waiting for end-of-line.  If it is the first character of the line, the read() in the user program returns 0,  which  signifies
              end-of-file.  Recognized when ICANON is set, and then not passed as input.
-----
so it may have something to do whether you are at the begin of a line, or not, perhaps.

You can see the current discipline via "stty -a".

What makes this stuff so obscure, is that you have a stack of ptys and terminal
lines, really, i.e. konsole, bash, ssh, sshd, bash, ... where all the line disciplines on
the stack are involved to finally cause your application to terminate eventually.

Responsible for the termination is the very last terminal line and the very last line
discipline setting program on the stack (shell, i.e.), since the other should all be raw,
transparently passing ctrl-d forward, so whatever is done on the ssh'd side is the
origin of the problem. The problem should be locally reproducible, cutting the stack
shorter.

For those who can reproduce problem (locally or remotely), i would thus suggest to
try to use a different terminal emulation, e.g. xterm or linux-console, which should
expose precisely the same behaviour, because they are plainly not involved in the
issue.

-lars