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read() blocking and TIOCINQ
- From: Ernesto Paiser <paiser at esrf dot fr>
- To: cygwin at cygwin dot com
- Date: Tue, 22 Aug 2006 10:10:47 +0200
- Subject: read() blocking and TIOCINQ
- Reply-to: paiser at esrf dot fr
Hello Corinna,
I have problems with read() function blocking and
waiting for characters on serial line with cygwin:
Here are some code fragments:
========================================================
fd = open(sl, O_RDWR | O_NOCTTY | O_NONBLOCK | O_NDELAY)
newpio.c_cflag = brate | CS8 | CLOCAL | CREAD;
newpio.c_iflag = IGNPAR | ICRNL;
newpio.c_oflag = 0;
newpio.c_lflag = 0;
newpio.c_cc[VTIME] = 1;
newpio.c_cc[VMIN] = 0;
...
n = ioctl(fd, TIOCINQ, &n); //It gives me an error (return -1) why??!!!
and
n = read(fd, buffer, 1); <<< HERE IS BLOCKING!!!
========================================================
TIOCINQ is working on CYGWIN,
Is there another way to solve this problem???
Thank you in advance,
Ernesto.
--
Ernesto PAISER ____________________ paiser@esrf.fr
E.S.R.F. - European Synchrotron Radiation Facility
6 rue Jules Horowitz BP 220 Grenoble CEDEX France
phone +33 4 76 88 23 48 fax +33 4 76 88 23 25
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