> 
> void main(void) {
>  FILE *f;
>  f = fopen("/dev/lpt0");
>  while (!feof(f)) putchar(fgetc(f));
> }

> cause a core dump after a little while?

You're not checking to see if f is void, which it will be
if you can't open /dev/lpt0, so there ends up being a
null pointer reference.

int main(void) {
  FILE *f;
  if ((f = fopen("/dev/lpt0")) {
    while (!feof(f) putchar(fgetc(f));  
  }
  return f == NULL;
}


-- 
+-----------------------------------------+-----------------------------------+
| Peter Naulls                            | Acorn Risc PC 700  *ARM Powered*  |
| pnaulls@wave.co.nz                      | Porting Java & Sather for Risc OS |
| http://lucy.cs.waikato.ac.nz/~pnaulls/  | Co-editor of Acorn archive list   |
| Phone 64-7-856-4562                     | Computer consultancy              |
| The meaning of life:  3.5               | Web page design                   |
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