1nbd_poll2(3) LIBNBD nbd_poll2(3)
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6 nbd_poll2 - poll the handle once, with fd
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9 #include <libnbd.h>
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11 int nbd_poll2 (
12 struct nbd_handle *h, int fd, int timeout
13 );
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16 This is the same as nbd_poll(3), but an additional file descriptor
17 parameter is passed. The additional fd is also polled (using
18 "POLLIN"). One use for this is to wait for an eventfd(2).
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21 This call returns an integer ≥ 0.
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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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29 The following parameters must not be NULL: "h". For more information
30 see "Non-NULL parameters" in libnbd(3).
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33 This function first appeared in libnbd 1.16.
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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_POLL2 1
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41 nbd_create(3), nbd_poll(3), libnbd(3), eventfd(2).
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44 Eric Blake
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46 Richard W.M. Jones
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49 Copyright Red Hat
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52 This library is free software; you can redistribute it and/or modify it
53 under the terms of the GNU Lesser General Public License as published
54 by the Free Software Foundation; either version 2 of the License, or
55 (at your option) any later version.
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57 This library is distributed in the hope that it will be useful, but
58 WITHOUT ANY WARRANTY; without even the implied warranty of
59 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
60 Lesser General Public License for more details.
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62 You should have received a copy of the GNU Lesser General Public
63 License along with this library; if not, write to the Free Software
64 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
65 02110-1301 USA
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69libnbd-1.18.1 2023-10-31 nbd_poll2(3)