1explain_poll_or_die(3)     Library Functions Manual     explain_poll_or_die(3)
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NAME

6       explain_poll_or_die - wait for some event on file descriptor and report
7       errors
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SYNOPSIS

10       #include <libexplain/poll.h>
11       int explain_poll_or_die(struct pollfd *fds, int nfds, int timeout);
12       int explain_poll_on_error(struct pollfd *fds, int nfds, int timeout);
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DESCRIPTION

15       The explain_poll_or_die function is used to  call  the  poll(2)  system
16       call.  On  failure  an  explanation will be printed to stderr, obtained
17       from the explain_poll(3) function, and then the process  terminates  by
18       calling exit(EXIT_FAILURE).
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20       The  explain_poll_on_error  function is used to call the poll(2) system
21       call. On failure an explanation will be  printed  to  stderr,  obtained
22       from the explain_poll(3) function, but still returns to the caller.
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24       fds     The fds, exactly as to be passed to the poll(2) system call.
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26       nfds    The nfds, exactly as to be passed to the poll(2) system call.
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28       timeout The  timeout,  exactly  as  to  be passed to the poll(2) system
29               call.
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RETURN VALUE

32       The explain_poll_or_die function only returns on success,  see  poll(2)
33       for  more  information. On failure, prints an explanation and exits, it
34       does not return.
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36       The explain_poll_on_error function always returns the value  return  by
37       the wrapped poll(2) system call.
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EXAMPLE

40       The  explain_poll_or_die  function  is intended to be used in a fashion
41       similar to the following example:
42              int result = explain_poll_or_die(fds, nfds, timeout);
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SEE ALSO

45       poll(2) wait for some event on a file descriptor
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47       explain_poll(3)
48               explain poll(2) errors
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50       exit(2) terminate the calling process
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53       libexplain version 0.40
54       Copyright (C) 2010 Peter Miller
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58                                                        explain_poll_or_die(3)
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