/* Copyright (C) 1995 EGLE Magic, New Zealand, All rights reserved. */
#include <stdio.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>
#include "dnews.h"
#include "str.h"
#include "hist.h"
#include "nntp.h"
#include "chan.h"
#include "feed.h"
#include "item.h"
#include "lib.h"
#include "group.h"
#include "emsg.h"
#ifdef xVMS
void lib_atexit( void fn(void));
#define atexit lib_atexit
#endif

void trace_email(void);
void dnews_exit(void);
void sig_init(void);
void dnews_flush(void);
#define LOCKFILE file_work("dnews.lock")

int main(int argc, char *argv[])
{
	int i;
	int pchan = -1;
	if (argc==2) {
	   if (strncmp(argv[1],"-p",2)!=0)  {
	      printf("Usage: dnews [-pchan_number]\n"); exit(1);
	   }
	   pchan = atoi(argv[1]+2);
	}
        strcpy(debug_str,config_getu(C_DEBUG));
	if (strlen(debug_str)==0) {
		strcpy(debug_str,"control:cancel:file:lib:,warn:,fatal:,post:,chan:,feed:,hist:,nntp:,err:,debug:,expire:,info:,item:,group:,suck:,cmd:,ncmd:,init:");	
	}
	debug_lvl = 0;
	for (i=0; i<5; i++) if (strcmp(debug_names[i],config_get(C_LOGLVL))==0) {
		debug_lvl = i;
	}
	emsg("init: nntp server %s %s starting, debug=%d %s \n",
			DNEWS_NAME,DNEWS_VERSION,debug_lvl,debug_names[debug_lvl]);
	if (pchan>=0) imsg("init: Using pre-opened channel %d \n",pchan);
	imsg("init: Loading history database, may take some time \n");

	access_read();
	feed_load();
	hist_init();
	group_read();

 	atexit(dnews_exit); 
	sig_init();
	imsg("init: Loading NNTP \n");
	nntp_init(pchan);
	emsg("init: Server initialized and running, %d groups \n",group_n());


	nntp_wait();
	emsg("init: Server Exiting for some reason \n");
	return 0;
}
void dnews_exit(void)
{
	emsg("fatal: %s exit handler called \n",DNEWS_NAME);
	dnews_flush();
	group_write();
}

void dnews_flush(void)
{
	item_flush();
	feed_flush();
	hist_flush(); 
	emsg_flush();
	group_used_flush();
}
void sig_hup(int x);
void sig_exit(int x);
void sig_init(void)
{
	signal(SIGHUP,sig_hup);
	signal(SIGTERM,sig_exit);
#ifdef unix
	signal(SIGPIPE,SIG_IGN);
	signal(SIGTRAP,sig_exit);
	signal(SIGFPE,sig_exit);
	signal(SIGBUS,sig_exit);
	signal(SIGSEGV,sig_exit);
	signal(SIGQUIT,sig_exit);
#endif
}
void sig_hup(int x)
{
	if (x==SIGHUP) emsg("dnews: Signal %d SIGHUP \n",x);
	else if (x==SIGTERM) {
		emsg("dnews: Signal %d SIGTERM \n",x); 
		dnews_flush();
		exit(1);
	}
	else emsg("dnews: Signal ?? %d ?? \n",x);
	dnews_flush();
	config_load();
	sig_init();
}
void sig_exit(int x)
{
   emsg("dnews: Signal %d causing exit \n",x); 
   dnews_flush();
   trace_email();
   exit(1);
}