/usr/include/kannel/gwlib/gwpoll.h is in kannel-dev 1.4.4-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* The Kannel Software License, Version 1.0
*
* Copyright (c) 2001-2014 Kannel Group
* Copyright (c) 1998-2001 WapIT Ltd.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Kannel Group (http://www.kannel.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "Kannel" and "Kannel Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please
* contact org@kannel.org.
*
* 5. Products derived from this software may not be called "Kannel",
* nor may "Kannel" appear in their name, without prior written
* permission of the Kannel Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE KANNEL GROUP OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Kannel Group. For more information on
* the Kannel Group, please see <http://www.kannel.org/>.
*
* Portions of this software are based upon software originally written at
* WapIT Ltd., Helsinki, Finland for the Kannel project.
*/
/* gwpoll.h - define poll() for systems that don't have it */
#ifndef GWPOLL_H
#define GWPOLL_H
/* If the system supplies it, we're done. Assume that if the header file
* exists, it will define poll() and struct pollfd for us. */
#ifdef HAVE_SYS_POLL_H
#include <sys/poll.h>
/* Most systems accept any negative timeout value as meaning infinite
* timeout. FreeBSD explicitly wants INFTIM, however. Other systems
* don't define INFTIM. So we use it if it's defined, and -1 otherwise.
*/
#ifdef INFTIM
#define POLL_NOTIMEOUT INFTIM
#else
#define POLL_NOTIMEOUT (-1)
#endif
#else
/* Define struct pollfd and the event bits, and declare a function poll()
* that uses them and is a wrapper around select(). */
struct pollfd {
int fd; /* file descriptor */
short events; /* requested events */
short revents; /* returned events */
};
/* Bits for events and revents */
#define POLLIN 1 /* Reading will not block */
#define POLLPRI 2 /* Urgent data available for reading */
#define POLLOUT 4 /* Writing will not block */
/* Bits only used in revents */
#define POLLERR 8 /* Error condition */
#define POLLHUP 16 /* Hung up: fd was closed by other side */
#define POLLNVAL 32 /* Invalid: fd not open or not valid */
#define POLL_NOTIMEOUT (-1)
/* Implement the function as gw_poll, in case the system does have a poll()
* function in its libraries but just fails to define it in sys/poll.h. */
#define poll(fdarray, numfds, timeout) gw_poll(fdarray, numfds, timeout)
int gw_poll(struct pollfd *fdarray, unsigned int numfds, int timeout);
#endif /* !HAVE_SYS_POLL_H */
#endif
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