1nbd_aio_get_fd(3) LIBNBD nbd_aio_get_fd(3)
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6 nbd_aio_get_fd - return file descriptor associated with this connection
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9 #include <libnbd.h>
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11 int nbd_aio_get_fd (struct nbd_handle *h);
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14 Return the underlying file descriptor associated with this connection.
15 You can use this to check if the file descriptor is ready for reading
16 or writing and call nbd_aio_notify_read(3) or nbd_aio_notify_write(3).
17 See also nbd_aio_get_direction(3). Do not do anything else with the
18 file descriptor.
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21 This call returns a file descriptor.
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24 On error "-1" is returned.
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26 Refer to "ERROR HANDLING" in libnbd(3) for how to get further details
27 of the error.
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30 This function first appeared in libnbd 1.0.
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32 If you need to test if this function is available at compile time check
33 if the following macro is defined:
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35 #define LIBNBD_HAVE_NBD_AIO_GET_FD 1
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38 nbd_aio_get_direction(3), nbd_aio_notify_read(3),
39 nbd_aio_notify_write(3), nbd_create(3), libnbd(3).
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42 Eric Blake
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44 Richard W.M. Jones
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47 Copyright (C) 2019 Red Hat Inc.
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50 This library is free software; you can redistribute it and/or modify it
51 under the terms of the GNU Lesser General Public License as published
52 by the Free Software Foundation; either version 2 of the License, or
53 (at your option) any later version.
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55 This library is distributed in the hope that it will be useful, but
56 WITHOUT ANY WARRANTY; without even the implied warranty of
57 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
58 Lesser General Public License for more details.
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60 You should have received a copy of the GNU Lesser General Public
61 License along with this library; if not, write to the Free Software
62 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
63 02110-1301 USA
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67libnbd-1.3.7 2020-04-23 nbd_aio_get_fd(3)