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The Question is:
I have vendor software that is returning the UNIX I/O file descriptor to a
terminal port. I need to provide the VMS QIO call to change the baud rate of
the channel since the POSIX tcsetattr function is not implemented. The problem
is that the QIO requires
the VMS channel number, not the file descriptor. I've searched all of the C
manuals for converting file descriptor to channel but it seems the only
conversion is the special socket descriptor to channel . I tried that in case
socket descriptors were similar enough to file descriptors but found that it
didn't work. I also pursured the conversions from file descriptors to file
pointers with no luck. Is there any way to convert a file descriptor to VMS
channel?
The Answer is :
There is normally no need to perform this translation, as you can open
a second and new channel to the terminal device (from a process with
SHARE privilege enabled). Make certain that you deassign any channel
that was opened via use of SHARE privilege prior to deassigning the
original I/O channel.
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