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> /* ATH */
> #include <sys/stat.h>
> #include <errno.h>
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>   /* ATH */
>   char *env;
>   struct stat sts;
> 
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>   /* ATH - 26 January 2012
>    *
>    * Check for the existence of the file name held in vm->filename.
>    * If it does not exist read the env variable RETROIMAGE and check for the existence of that file.
>    * If that does not exists exit with an error.
>    *
>    */
> 
>   if ( ( stat( vm->filename, &sts) == -1 ) && errno == ENOENT ) {
>       // File doesn't exist, get the environment variable.
>       //
>       env = (char *)getenv("RETROIMAGE");
>       if( !env ) {
>         fprintf(stderr,"No image file and environment variable RETROIMAGE not set.\n");
>         exit(1);
>       } else {
>           strncpy(vm->filename, env,sizeof(vm->filename));
>           fprintf(stderr,"Loading image from %s\n", env);
>       }
>   }