

             
	     


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

    
    int  ()
    {
       char url[30];
       int exitValue=-1;
       FILE *fr;

       char s[300]; 	     
	system("rm index.html*");
        system("wget http://www.cs.rmit.edu./students/ ");    
	 system("mv index.html one.html");
	 
           printf("System completed Writing\n"); 
	   system("sleep 3600");
	    
	    
            system("wget http://www.cs.rmit.edu./students/ "); 
            
	          
	    	     
	     exitValue=system("diff one.html index.html > .out" );
	     
             fr=fopen(".out","r");
	     
	     strcpy(s,"mailx -s \"Testing Again\"");
	     	     
	     strcat(s,"  < .out");
	     if(fgets(url,30,fr))
	     {
	     system(s);
	     
	     system("rm one.html");  
	     
	     printf("\nCheck your mail") ; 
	     fclose(fr);        
	     }
	       else
	           {
	            printf(" changes detected"); 
		    
	            system("rm one.html"); 
		    fclose(fr);   
		   }
		   return 0;   
      }
      
      
   





#include<stdio.h>
#include<stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/time.h>
#include<string.h>
int ()
{
int flag=1;
const char delimiter[]=" \n\t";
FILE *fp1;
char line1[100];
char filename1[50];
char *token;

while(1)
{
system("wget http://www.cs.rmit.edu./students/ ");
system("mv index.html test1");
sleep(3600);
system("wget http://www.cs.rmit.edu./students/ ");
system("mv index.html test2");
system("diff test1 test2 >test3");
system("file test3 >test4"); 
strcpy(filename1,"test4");
if((fp1=fopen(filename1,"r"))==NULL){
printf("cannot open file\n");
exit(1);
}
fgets(line1,sizeof(line1),fp1);
token=strtok(line1,delimiter);
        while(token!=NULL)
                {
if(strcmp(token,"empty")==0)
{
printf(" CHANGES\n");
flag=0;

}
token=strtok(NULL,delimiter);

                 }
if(flag==1)
{
system("mail  < test3");
}
fclose(fp1);
}
return(0);
}
