On 08/26/11 23:55, Matthias Melcher wrote:
> Well, for now the popen solution is somewhat OK.
> I want Fluid to launch all kinds of tools, which usually
> only requires reading characters from the tools.
> It would be nice to have some way to send characters as well,
> for example for launching gdb
I had some time this weekend to make a variation that works
with interactive programs like gdb(1). It's unix only,
but handles stdin, stdout, and stderr asynchronously:
http://seriss.com/people/erco/fltk/unix-bidir-dumb-terminal.cxx
It uses pthreads and bidirectional pipe(2)s. All FLTK operation
is handled by the parent; the threads are just data pumps.
[I chose not to use add_fd() to facilitate a Windows port]
With some work, it could be extended to support windows;
the mechanics should be able to be ported to use the WIN32
CreatePipe()/CreateThread()/CreateProcess() and friends.
Basically the "MyTerminal" class from my original example
has been extended to handle bi-directional interaction
with the child process.
You'll see actual prompts from the shell and interactive tools,
and can interact with them asynchronously.
The example opens up a tcsh prompt. So you can fire off
interactive programs like gdb(1) and nslookup(1), and you
can interact with them normally. (see caveats below)
Tested on linux and osx.
CAVEATS
Some simple line editing is supported: backspace, ^U, ^W, Enter.
That's it. Other special characters may yield 'undefined behavior'.
Does NOT support pty features like job control, EOF, 'raw' modes.
So for instance, ^Z, ^C, or ^D are not supported.
Also: no inline editing like ^A, ^E, ^P, ^N, arrow keys, etc.
Because this is implemented around Fl_Text_Editor, many of
the editor's features are available that shouldn't be;
the arrow keys and mouse clicks can move the text cursor up into
the screen history.
Some additions are necessary to handle reaping the child process,
and to allow the ability to kill the child and start a new one.
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