Jim Brain <brain <at> jbrain.com> writes: > > I have an application that I need to port to windows, and it uses these two > Linux IOCTLs. Specifically, the app needs to monitor the DSR line and signal > another process when it changes. > > I have migrated the rest of the app over with minimal work, but obviously > cygwin does not support linux/serial.h. I am OK with a rewrite of this > function (the rest is working fine), and am also OK writing it in straight > Win32 calls, but I don't know how to relate my opened fd with a HANDLE to use > the relevant WIN32 calls. > > Of course, there might be a much easier way to monitor for changes to DSR line, > so I am up for an alternative (It would be nice to make the code portable to > *BSD* as well, which means losing this IOCTL), but I am lost at present. Any > help would be appreciated. > > I can send the current code to anyone who needs it. > > Jim Brain
As a followup, I thought maybe I would use the Win32 API to open a serial port, use cygwin_attach_handle_to_fd() and save off both handles. Then, when I need to WaitCommEvent, I'd use the HANDLE, otherwise, use the fd. Problem: All the examples online use CreateFile, which I coded up, and cygwin gives me a fd of 8, but select returns immediately and I read -1 bytes on serial. I looked at the cygwin source, which uses NtCreateFile, but I can't find headers or libraries for that. I am stumped. I feel like I am so close... It's rather a bummer there is a not a cygwin_get_win32_handle(int fd), as that is what I need. Anyone got any ideas? Jim -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
