Spacerocks score decryptor/encryptor

gistfile1.c

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

int main(int argc, char **argv)
{
   FILE *f; char buf, buf2[255], read = 0, isScore = 0, *s;
   if (argc < 1) return EXIT_FAILURE;
   if (!(f = fopen(argv[1], "rb"))) return EXIT_FAILURE;
   while (fread(&buf, 1, 1, f) == 1) {
      if (!isScore && buf+128 != '\n' && read<sizeof(buf2)-1) buf2[read++] = buf+128, buf2[read] = 0;
      if (argc > 2 && isScore && !strcmp(buf2, argv[2])) {
         for (s = argv[3]; *s; ++s) printf("%c", *s+128); puts("\n");
         while (fread(&buf, 1, 1, f) == 1 && buf+128 != '\n');
      } else {
         printf("%c", (argc>2?buf:buf+128));
      }
      if (buf+128 == '\n') isScore = !isScore, read = 0;
   }
   printf("\n"); fclose(f);
   return EXIT_SUCCESS;
}