#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/file.h>

void main(void)
{
   FILE *fp;

   int count;
   char *ord[2];
   char **querystring = getenv("QUERY_STRING");

   if((fp=fopen("/home/usr18/html/cgi/counter.dat", "r")) == NULL)
      count = 1;
   else
   {
      fscanf(fp, "%d", &count);

      count += 1;

      fclose(fp);
   }
   printf("<a href=\"/log.shtml\">%d</a>", count);
   fp=fopen("/home/usr18/html/cgi/counter.dat", "w");

   flock(fp, LOCK_EX);
   fprintf(fp, "%d\n", count);
   fclose(fp);
   flock(fp, LOCK_UN);
}