NAME

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

SYNOPSIS

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

DESCRIPTION

       The  explain_poll_or_die function is used to call the poll(2) system call. On failure an explanation will
       be printed to stderr, obtained from the explain_poll(3) function, and  then  the  process  terminates  by
       calling exit(EXIT_FAILURE).

       The  explain_poll_on_error  function  is  used to call the poll(2) system call. On failure an explanation
       will be printed to stderr, obtained from the explain_poll(3) function, but still returns to the caller.

       fds     The fds, exactly as to be passed to the poll(2) system call.

       nfds    The nfds, exactly as to be passed to the poll(2) system call.

       timeout The timeout, exactly as to be passed to the poll(2) system call.

RETURN VALUE

       The explain_poll_or_die function only returns on success, see poll(2) for more information.  On  failure,
       prints an explanation and exits, it does not return.

       The explain_poll_on_error function always returns the value return by the wrapped poll(2) system call.

EXAMPLE

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

SEE ALSO

       poll(2) wait for some event on a file descriptor

       explain_poll(3)
               explain poll(2) errors

       exit(2) terminate the calling process

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2010 Peter Miller

                                                                                          explain_poll_or_die(3)