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/*
* bitz-server, An ICAP server implementation in C++
* Copyright (C) 2012 Uditha Atukorala
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef BITZ_SERVER_H
#define BITZ_SERVER_H
#include "bitz/manager.h"
#include <csignal>
#include <sys/types.h>
namespace bitz {
namespace server {
/**
* Structure to hold server globals initialised
* by the init() method.
*/
struct server_t {
pid_t pid;
int pidfd;
volatile sig_atomic_t terminating;
bool daemon;
bitz::Manager * manager;
};
/**
* Structure to hold command line options.
*/
struct options_t {
int debug_flag;
std::string config_file;
};
void init();
void init_signal_handlers();
void init_sigchld_handler();
void init_sigterm_handler();
void init_sigquit_handler();
void init_sigint_handler();
void sigchld_handler( int sig, siginfo_t * sig_info, void * context );
void sigterm_handler( int sig, siginfo_t * sig_info, void * context );
void sigquit_handler( int sig, siginfo_t * sig_info, void * context );
void sigint_handler( int sig, siginfo_t * sig_info, void * context );
void daemonize( const char * run_dir, const char * pid_file );
void shutdown();
void termination_handler( int sig, siginfo_t * sig_info, void * context );
/**
* Read command line options and return a options_t structure.
* This method will terminate the program with an exit status
* of EXIT_FAILURE if any errors are found while reading options.
* If --version or --help options are found this will print the
* appropriate message to the standard output and terminate with
* EXIT_SUCCESS.
*
* @param argc same as main() argc
* @param argv same as main() argv
* @return read options
*/
options_t read_options( int argc, char **argv );
/**
* Print version information to the standard output
*/
void print_version();
/**
* Print usage message to the standard output
*/
void print_usage();
/**
* Start the server by creating a bitz::Manager instance and spawn
* workers.
*
* @param port port number to listen to
* @param children number of children to spawn
* @param max_request maximum number of requests that a child will serve
* @param comm_timeout communication timeout value in seconds
*/
void start( int port, unsigned int children, int max_requests, int comm_timeout );
/**
* Run the server managing workers until a termination signal is received.
* This process will never return, instead the termination signal will
* end the process.
*/
void run();
} /* end of namespace server */
} /* end of namespace bitz */
#endif /* !BITZ_SERVER_H */
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