Ada way to read/write to character file

[Michael Bode <m.g.bode@web.de>]

Hi,

I'm wondering if there is an Ada way (i.e. standard package) to read
and write to a character mode (sequential) file like the COM?:
resp. /dev/ttyS? interface. Ada.Text_IO has no read/write file mode
and with GNAT I wasn't able to connect two File_Type variables to the
same physical file at the same time. 

I want to communicate with a device hanging on the RS232 port. I have
to write to the device and read the answers. I could of course do it
like open, write, close, open read, close, open,... But I think this
is not very elegant. I just finished doing it with the Win32
resp. POSIX API functions, but I'm still wondering if it could be done
with some standard Ada package.