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Man Pages


Manual Reference Pages  -  EXPLAIN_POLL_OR_DIE (3)

NAME

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

CONTENTS

Synopsis
Description
Return Value
Example
See Also
Copyright

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

The B]explain_poll_on_error function is used to call the I]poll(2) system call. On failure an explanation will be printed to I]stderr, obtained from the I]explain_poll(3) function, but still returns to the caller.
I]fds The fds, exactly as to be passed to the I]poll(2) system call.
I]nfds The nfds, exactly as to be passed to the I]poll(2) system call.
I]timeout
  The timeout, exactly as to be passed to the I]poll(2) system call.

RETURN VALUE

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

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

EXAMPLE

The B]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

I]poll(2) wait for some event on a file descriptor
I]explain_poll(3)
  explain I]poll(2) errors
I]exit(2) terminate the calling process

COPYRIGHT

libexplain version 1.3
Copyright © 2010 Peter Miller
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