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 0.52
       Copyright (C) 2010 Peter Miller

                                                                           explain_poll_or_die(3)