Hello, accessing serial port under cygwin, with ids above 10 is broken:
Using "/dev/com20" results in a "No such file or directory" error.
#include <unistd.h>
#include <fcntl.h>
#include <termios.h>
int main (int argument_count, char * arguments [])
{
printf("opening com20:");
int fd = open("/dev/com20", O_RDONLY | O_NONBLOCK);
perror(NULL);
struct termios options;
int result = tcgetattr(fd, &options);
perror(NULL);
}
The following post:
http://www.cygwin.com/ml/cygwin/1999-12/msg00323.html says I should use
"\\\\.\\com20" instead of "/dev/com20". If I do that, the call to open(...)
succeed,
but the call to tcgetattr raises a "Inappropriate ioctl for device" error.
I checked the example using "/dev/com3", and it works all right, so the
issue is limited to ports id above 9.
I already checked the following posts:
http://sourceware.org/ml/insight/2004-q4/msg00078.html, so it seems to
be a bug.
Do you have a workaround for this?
Kind regards,
Stan.
signature.asc
Description: OpenPGP digital signature
