1nbd_poll2(3)                        LIBNBD                        nbd_poll2(3)
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NAME

6       nbd_poll2 - poll the handle once, with fd
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SYNOPSIS

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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DESCRIPTION

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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RETURN VALUE

21       This call returns an integer ≥ 0.
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ERRORS

24       On error -1 is returned.
25
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 1.16.
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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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SEE ALSO

41       nbd_create(3), nbd_poll(3), libnbd(3), eventfd(2).
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AUTHORS

44       Eric Blake
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46       Richard W.M. Jones
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49       Copyright Red Hat
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LICENSE

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.
56
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.
61
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-1.16.5                     2023-09-26                      nbd_poll2(3)
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