extern int x1f4_imap_lxfile (void *lxfile, void *file, int fd);
x1f4_imap_lxfile function sets the
file object for reading
fd file descriptor.
lxfile is expected the file library
object for which the
file object was created.
file is assumed closed.
The function returns
0 for success, one of the defined error codes for
See File Library Errors.