1nbd_aio_get_fd(3)                   LIBNBD                   nbd_aio_get_fd(3)
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NAME

6       nbd_aio_get_fd - return file descriptor associated with this connection
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SYNOPSIS

9        #include <libnbd.h>
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11        int nbd_aio_get_fd (struct nbd_handle *h);
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DESCRIPTION

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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RETURN VALUE

21       This call returns a file descriptor.
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ERRORS

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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29       The following parameters must not be NULL: "h".  For more information
30       see "Non-NULL parameters" in libnbd(3).
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VERSION

33       This function first appeared in libnbd 1.0.
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35       If you need to test if this function is available at compile time check
36       if the following macro is defined:
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38        #define LIBNBD_HAVE_NBD_AIO_GET_FD 1
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SEE ALSO

41       nbd_aio_get_direction(3), nbd_aio_notify_read(3),
42       nbd_aio_notify_write(3), nbd_create(3), libnbd(3).
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AUTHORS

45       Eric Blake
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47       Richard W.M. Jones
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50       Copyright (C) 2019-2021 Red Hat Inc.
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LICENSE

53       This library is free software; you can redistribute it and/or modify it
54       under the terms of the GNU Lesser General Public License as published
55       by the Free Software Foundation; either version 2 of the License, or
56       (at your option) any later version.
57
58       This library is distributed in the hope that it will be useful, but
59       WITHOUT ANY WARRANTY; without even the implied warranty of
60       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
61       Lesser General Public License for more details.
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63       You should have received a copy of the GNU Lesser General Public
64       License along with this library; if not, write to the Free Software
65       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
66       02110-1301 USA
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70libnbd-1.14.2                     2023-01-03                 nbd_aio_get_fd(3)
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