1.5.18 ( 0.132/4/2 ) - read() - blocks ( serial programming )

["pppd" <pppd at terra dot com dot br>]

Hello guys,

       I´m working to convert a Linux application to work with Windows XP under Cygwin 1.5.18 ( 0.132/4/2 ). Ncurses package and parallel port programming works without changes ( congratulations ).
I have a problem with serial programming.

First, I did two C files: ( attached )

       setcmc7.c  - Sets serial configuration through Win32 API. ( Linux termios settings/functions doesn't work for me :-( ).
       cmc7.c - Read caracters from serial.

After setting serial configuration by setcmc7.c I can read serial port using cmc7.

My doubt is: Why read() function blocks the terminal (keyboard) until read a caracter ? At Linux it's work fine ( same code ).

My application needs to read keyboard at the same time with serial.
I have tried some flags with open ( O_NONBLOCK, O_NDELAY .. ) unfortunately doesn't work too.

Does anybody can help me please?

Best Regards,
Douglas Schilling Landgraf

Attachment: setcmc7.c
Description: Text document

Attachment: cmc7.c
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Attachment: cygcheck.out
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