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file descriptors vs. ports


While trying to wrap the termios calls (tcgetattr, tcsetattr) in libc (which 
are lacking in the posix support that comes with guile) I stumbled about file 
descriptors as arguments.
Is it possible to wrap those calls into subrs that take a port as an argument
, where the corresponding C-function takes a fildescriptor? Which libguile
functions would one use for that?

Klaus Schilling