Re: [PATCH] Smackv10: Smack rules grammar + their stateful parser

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


On Mon, 5 Nov 2007, Ahmed S. Darwish wrote:

> On Sun, Nov 04, 2007 at 12:28:48PM +0000, Pavel Machek wrote:
> > 
> > Can we avoid string parsers in the kernel?
> > 
> Ok, Could someone suggest a better idea please ?. 

I personally think string parsers are *much* better than the alternatives 
(which basically boil down to nasty binary interfaces)

> I thought about packing the rules in a structure and sending
> it over an ioctl() command. Is this applicable ?

That's *MUCH* worse.

Strings are nice. They aren't that complex, and as long as it's not a 
performance-critical area, there are basically no downsides.

Binary structures and ioctl's are *much* worse. They are totally 
undebuggable with generic tools (think "echo" or "strace"), and they are a 
total nightmare to parse across architectures and pointer sizes.

So the rule should be: always use strings if at all possible and relevant. 
If the data is fundamentally binary, it shouldn't be re-coded to ascii (no 
real advantage), but if the data is "stringish", and there aren't big 
performance issues, then keep it as strings.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at
Please read the FAQ at

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux