Re: [PATCH] 2.5.17 /dev/ports

[Russell King]

On Wed, May 22, 2002 at 06:17:26PM +0200, Martin Dalecki wrote:
> #include <linux/io.h>
> #include <stdio.h>
> #include <stdlib.h>
> 
> int main(char *argv[], int argc)
> {
> 	int port = aoit(argv[0]);
> 	 int byte = aoit(argv[1]);
> 
> 	if (port > 0)
> 		return inb(port);		
> 	 else
> 			outb(port, byte);
> 
> 
> 		return 0;
> }

Erm:

1. not checking number of arguments passed.
2. thinking argv[0] is the first arg.
3. wrong test for in/out (port > 0 -> inb, port <= 0 -> outb)
4. returning the read byte via the program status code.
5. aoit is an undefined function.
6. including linux/*.h is fundamentally wrong for any user space
   program.

That's one bug every 2 lines.  Should I continue? 8)

-- 
Russell King ([e-mail])                The developer of ARM Linux
             http://www.arm.linux.org.uk/personal/aboutme.html