nbd_aio_get_fd - return file descriptor associated with this connection
#include <libnbd.h> int nbd_aio_get_fd (struct nbd_handle *h);
Return the underlying file descriptor associated with this connection. You can use this to check if the file descriptor is ready for reading or writing and call nbd_aio_notify_read(3) or nbd_aio_notify_write(3). See also nbd_aio_get_direction(3). Do not do anything else with the file descriptor.
This call returns a file descriptor.
-1 is returned.
Refer to "ERROR HANDLING" in libnbd(3) for how to get further details of the error.
This function first appeared in libnbd 1.0.
If you need to test if this function is available at compile time check if the following macro is defined:
#define LIBNBD_HAVE_NBD_AIO_GET_FD 1
nbd_aio_get_direction(3), nbd_aio_notify_read(3), nbd_aio_notify_write(3), nbd_create(3), libnbd(3).
Richard W.M. Jones
Copyright (C) 2019-2021 Red Hat Inc.
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