Opening COM2

[Bob Wilson <rwilson at cfawilson dot harvard dot edu>]

I have a program which ran correctly when compiled on a gnu-win32
package from about a year ago, but is failing when compiled with 17.1
beta.  The machine is running NT 3.51 and COM2 is connected to a
microprocessor with only td, rd and ground connected.  The open:

        if ((comfd = open("com2", O_RDWR | O_TEXT)) <= 0) {
            fprintf(stderr, "Cmd: Unable to open terminal\n");
            exit(1);
        }

hangs.  It doesn't help to tie the modem control lines high, but if I
generate a few characters on the rd line, the open completes.  In no
case is there an error return.

I have looked for this problem in the FAQ and looked for archives of
this mailing list, but both searches failed.

Can anyone help?

Thanks,
Bob Wilson
rwilson@cfa.harvard.edu
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