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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* miav_server.cc
*
* Sat Aug 21 17:32:24 2004
* Copyright 2004 Bent Bisballe Nyeng
* deva@aasimon.org
****************************************************************************/
/*
* This file is part of MIaV.
*
* MIaV 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 2 of the License, or
* (at your option) any later version.
*
* MIaV 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 MIaV; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
// For ETC
#include "config.h"
#include "configuration.h"
#include "info_console.h"
#include <stdio.h>
#include <string.h>
#include <string>
#include "server.h"
#include "socket.h"
#include "network.h"
#include <signal.h>
#include <errno.h>
// For getpwent and getgrent
#include <sys/types.h>
#include <grp.h>
#include <pwd.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#elif defined(HAVE_STDLIB_H) // Solaris has getopt() here
#include <stdlib.h>
#else
#error "Don't know where getopt() is prototyped"
#endif
static const char usage_str[] =
"Usage: %s [options]\n"
"Options:\n"
" -c file Read configfile from 'file'\n"
" -f Run in foreground mode (non-background mode)\n"
" -u user Run as 'user' (overrides the configfile)\n"
" -g group Run as 'group' (overrides the configfile)\n"
" -h This message\n"
;
int main(int argc, char *argv[])
{
char *config_file = ETC"/miav.conf";
int optc;
int lose = 0;
bool foreground = false;
char *user_opt = NULL;
char *group_opt = NULL;
// Parse the commandline
while((optc = getopt(argc, argv, "c:fhu:g:")) != EOF) {
switch(optc) {
case 'c':
config_file = strdup(optarg);
if(!config_file) {
fprintf(stderr, "Fatal: out of memory\n");
return 1;
}
break;
case 'u':
user_opt = strdup(optarg);
if(!user_opt) {
fprintf(stderr, "Fatal: out of memory\n");
return 1;
}
break;
case 'g':
group_opt = strdup(optarg);
if(!group_opt) {
fprintf(stderr, "Fatal: out of memory\n");
return 1;
}
break;
case 'f':
foreground = true;
break;
case 'h':
fprintf(stdout, usage_str, argv[0]);
return 0;
default:
lose++;
break;
}
}
if(lose) {
// Error message was printed by getopt
return 1;
}
fprintf(stderr, "Using config file [%s]\n", config_file);
Configuration config(config_file);
MIaV::initConfig(&config);
InfoConsole info;
MIaV::initInfo(&info);
std::string user;
if(user_opt) user = std::string(user_opt);
else {
if(config.get("server_user", &user))
info.error("Could not read symbol [server_user] from the conf file!");
}
std::string group;
if(group_opt) group = std::string(group_opt);
else {
if(config.get("server_group", &group))
info.error("Could not read symbol [server_group] from the conf file!");
}
// Fetch user id
int uid = -1;
struct passwd *p = getpwent();
while(p) {
if(strcmp(p->pw_name, user.c_str()) == 0) uid = p->pw_uid;
p = getpwent();
}
if(uid == -1) {
fprintf(stderr, "Could not find user \"%s\" in /etc/passwd file.\n", user.c_str());
}
// Fetch group id
int gid = -1;
struct group *g = getgrent();
while(g) {
if(strcmp(g->gr_name, group.c_str()) == 0) gid = g->gr_gid;
g = getgrent();
}
if(gid == -1) {
fprintf(stderr, "Could not find group \"%s\" in /etc/group file.\n", group.c_str());
}
if(!foreground) {
fprintf(stderr, "Entering daemon mode\n");
daemon(0,0);
signal (SIGTERM, SIG_IGN);
signal (SIGINT, SIG_IGN);
signal (SIGHUP, SIG_IGN);
} else {
fprintf(stderr, "Running in foreground mode.\n");
}
int port;
if(config.get("server_port", &port))
info.error("Could not read symbol [server_port] from the conf file!");
pid_t childpid; // variable to store the child's pid
signal(SIGCLD, SIG_IGN); // Ved SIGCHILD til IGNORE maa wait/waitpid ikke kaldes
// (ellers kommer der kernel-brok)
MIaV::info->info("Starting MIaV server v. %s", VERSION);
MIaV::info->info("Listening on port %d", port);
Socket *socket = new Socket(port);
if(socket->hasError()) {
MIaV::info->error("Listening socket has errors, quitting.");
delete socket;
return 1;
}
while(1) {
Socket *csocket = new Socket(socket->slisten());
if(socket->hasError()) {
MIaV::info->error("Server socket has errors, quitting.");
delete csocket;
break;
}
if(csocket->hasError()) {
MIaV::info->error("Child socket has errors, quitting.");
delete csocket;
break;
}
if(!csocket->isConnected()) {
MIaV::info->error("Child socket is not connected, quitting.");
delete csocket;
break;
}
childpid = fork();
switch(childpid) {
case -1: // fork() returns -1 on failure
MIaV::info->log("Fork error: %s", strerror(errno));
exit(1);
case 0: // fork() returns 0 to the child process
delete socket; // Close listen socket.
newConnection(csocket);
delete csocket; // Close communication socket.
exit(0);
default: // fork() returns new pid to the parent process
break;
}
}
delete socket;
return 0;
}
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