"read" bug in Cygwin 1.5.16?

[Peter Farley]

Hi all,

I tried to forward this message to the main cygwin
list yesterday, but had a little trouble getting it
there, probably because I mentioned "xterm" in the
subject.  I'm trying again in case this is NOT an "X"
problem but a base cygwin problem.

I have attached the test program xtermbug.c instead 
of pasting it inline.  I hope that is OK for this
list.

If there is anything I can do to help debug the reason
I am seeing this problem, please just tell me what to
do.

BTW, thanks to all the developers for an awesome
product.

Regards,

Peter Farley

--- Peter Farley <pjfarley3@yahoo.com> wrote:

> Hi all,
> 
> The following program demonstrates what looks to me
> like a bug in the "read" function in an xterm (as
> opposed to a Cygwin console window).  To run the
> test, compile with:
> 
> gcc -g -o xtermbug.exe xtermbug.c
> 
> When you run it in a console window, you can enter
> normal keyboard characters, then a return to see
> "cmdline=<what you typed>".  Press the Esc key to
> exit the program.
> 
> When run in an xterm window, the first keypress
> causes this behavior:
> 
> 1. Select returns with rc = 0 and readset set to
> indicate that a key was received
> 2. "read" returns with kblen = 1 and kbbuf[0] = '\0'
> 3. (1) and (2) repeat forever.
> 
> I put in a "maxdbg" parameter and terminate the
> program after 5 occurrences of this loop.
> 
> This problem was first detected trying to run a copy
> of the hercules IBM mainframe emulator in a Cygwin
> xterm window.  The code below is extracted and
> minimalized as much as possible from the hercules
> keyboard input routine.
> 
> Peter Farley


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