/*
---------------------------------------------------------------------------
 $Id: cnfchk.c,v 1.11 2006/09/22 23:06:41 cnepveu Exp $
---------------------------------------------------------------------------
Copyright (c) 2001-2006 Hexago Inc. All rights reserved.

  LICENSE NOTICE: You may use and modify this source code only if you
  have executed a valid license agreement with Hexago Inc. granting
  you the right to do so, the said license agreement governing such
  use and modifications.   Copyright or other intellectual property
  notices are not to be removed from the source code.
---------------------------------------------------------------------------
*/

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <memory.h>
#include <string.h>

#include "platform.h"

#include "cnfchk.h"
#include "config.h"
#include "log.h"
#include "hex_strings.h"

char *template_mappings[] = {	"freebsd44", "freebsd", "freebsd4", "freebsd", "windows2000", "windows",
								"windows2003", "windows", "windowsXP", "windows",
								"solaris8", "solaris", NULL };

static int readfixwrite(char *, char *, char *, char *);

/* This next function has to return -1 in any case - it exits the client and 
   does nothing else. 
   */

int 
tspFixConfig(void) {
	tConf t;
	char **tm = template_mappings;
	int worked = 0;

	Display(LOG_LEVEL_1, ELNotice, "tspFixConfig", HEX_STR_VERIF_AND_FIX_CFG_FILE);

	memset(&t, 0, sizeof(tConf));
	if (tspReadConfigFile(FileName, &t) != 0) {
		Display(LOG_LEVEL_1, ELError, "tspFixConfig", HEX_STR_ERR_FROM_CFG_FILE, FileName);
		return -1;
	}

	if (t.template == NULL) {
		Display(LOG_LEVEL_1, ELError, "tspFixConfig", HEX_STR_CANT_READ_TEMPLATE_FROM_CFG, FileName);
		return -1;
	}

	/* fix template names from older version */

	while (*tm != NULL) {
		//Display(0, ELInfo, "tspFixConfig", "Checkout out %s, config is %s", *tm, t.template);

		if (strcmp(t.template, *tm) == 0) {
			Display(LOG_LEVEL_1, ELInfo, "tspFixConfig", HEX_STR_WRONG_TEMPLATE_NAME, FileName, *tm, *(tm+1));
			/* needs a replacement in the config file right here.
			   rename the config file to .old and recreate one
			   with the mapped template name.
			   */
			readfixwrite(FileName, "gw6c.conf.new", "template=", *(tm+1));
			worked = 1;
		}
		tm+=2;
	}

	if (worked == 0) 
		Display(LOG_LEVEL_1, ELInfo, "tspFixConfig", HEX_STR_NOOP_CFG_VALID);

	return -1;
}

static
int readfixwrite(char *in, char *out, char *pname, char *pvalue) {

	FILE *f_in, *f_out;
	char *line;

	line = (char *)malloc(256);

	if ( (f_in = fopen(in, "r")) == NULL)
		return 1;
	if ( (f_out = fopen(out, "w")) == NULL)
		return 1;

	while (fgets(line, 256, f_in) != NULL) {
		char buf[256];
		strncpy(buf, line, strlen(pname));
		if (strcmp(buf, pname) == 0) {
			memset(buf, 0, sizeof(buf));
			strcat(buf, pname);
			strcat(buf, pvalue);
			strcat(buf, "\n");
			fputs(buf, f_out);
		}
		else fputs(line, f_out);
	}

	fclose(f_in);
	fclose(f_out);

	unlink(in);
	rename(out, in);

	return 0;
}