debian man page for explain_poll_or_die

explain_poll_or_die(3)					     Library Functions Manual					    explain_poll_or_die(3)

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)