client.h
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/****************************************************************************
*
* Copyright (C) 2016, 2018 PX4 Development Team. 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. Neither the name PX4 nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS 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
* COPYRIGHT OWNER OR 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.
*
****************************************************************************/
/**
* @file client.h
*
* The client can connect and write a command to the socket that is supplied by
* the server. It will then close its half of the connection, and read back the
* stdout stream of the process that it started, followed by its return value.
*
* It the client dies, the connection gets closed automatically and the corresponding
* thread in the server gets cancelled.
*
* @author Julian Oes <julian@oes.ch>
* @author Beat Küng <beat-kueng@gmx.net>
* @author Mara Bos <m-ou.se@m-ou.se>
*/
#pragma once
#include <stdint.h>
#include "sock_protocol.h"
namespace px4_daemon
{
class Client
{
public:
Client(int instance_id = 0);
~Client();
Client(Client &&other) : _fd(other._fd), _instance_id(other._instance_id)
{
// Steal the fd from the moved-from client.
other._fd = -1;
}
/**
* Process the supplied command line arguments and send them to server.
*
* @param argc: number of arguments
* @param argv: argument values
* @return 0 on success
*/
int process_args(const int argc, const char **argv);
private:
int _send_cmds(const int argc, const char **argv);
int _listen();
int _fd;
int _instance_id; ///< instance ID for running multiple instances of the px4 server
};
} // namespace px4_daemon