/*
 * Tlf - contest logging program for amateur radio operators
 * Copyright (C) 2001-2002-2003 Rein Couperus <pa0rct@amsat.org>
 *
 * 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 2 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 Library 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.
 */

  	/* ------------------------------------------------------------
 	*    make sure logfile is present
 	*
 	*--------------------------------------------------------------*/

#include "checklogfile.h"

 	void checklogfile(void)
 	{

 	extern char logfile[26];
	extern char backgrnd_str[];

 	int lfile;
	int qsobytes;
	int qsolines;
	int errbytes;
	struct stat statbuf;
	char inputbuffer[800];


	FILE *infile;
	FILE *outfile;
 	FILE *fp;

		if  ( (fp = fopen(logfile,"a"))  == NULL){
			fprintf(stdout,  "Opening logfile not possible.\n");
			exit(1);
		}

		fclose(fp);

		if ((lfile = open(logfile, O_RDWR)) < 0){

				mvprintw(24,0, "I can not find the logfile...");
				refresh();
				sleep(2);
				exit(0);

		}  else {

				fstat(lfile, &statbuf);
				qsobytes = statbuf.st_size ;
				qsolines =   qsobytes / 81;
				errbytes = qsobytes - (qsolines * 81);

				if (errbytes != 0) {

					close (lfile);

					if  ( (infile = fopen(logfile,"r"))  == NULL){
						mvprintw(24,0, "Unable to open logfile...");
						refresh();
						sleep(2);

					}  else {
						if  ( (outfile = fopen("./cpyfile","w"))  == NULL){
							mvprintw(24,0, "Unable to open cpyfile...");
							refresh();
							sleep(2);
						} else {

							while (! (feof (infile))){

								fgets (inputbuffer, 160, infile);


								if (strlen(inputbuffer) != 81){
									strcat(inputbuffer, backgrnd_str);
									inputbuffer[81] = '\0';
								}

								fputs(inputbuffer, outfile);
							}

       							fclose (infile);
							fclose (outfile);

						}

						if ((lfile = open("./cpyfile", O_RDWR)) < 0){

							mvprintw(24,0, "I can not find the copy file...");
							refresh();
							sleep(2);
						}  else {


							fstat(lfile, &statbuf);

							if(statbuf.st_size >  80) {
								ftruncate(lfile, statbuf.st_size -  81);
								fsync(lfile);

							}


							close(lfile);
						}

							rename ("./cpyfile", logfile);
							remove ("./cpyfile");
					}

				} else   close (lfile);
    		}

	}