Messages in this thread |  | | Subject | Re: Safe error numbers for User-defined return values | Date | Tue, 6 Nov 2001 11:57:59 +0000 (GMT) | From | Alan Cox <> |
| |
> I want to define custom return values for my ioctl calls in my Kernel > module. What is the recommended start value for user defined constants? > I notice asm/errno.h only goes up to 124 (in 2.4.12), so should I start at > 125 or should I start at 200 to be safe? > > I probably only need 30 or so different codes.
You want to return non base errno codes in a different field and return real errno codes by return value. If everyone simple invented private returns for ioctl all hell would break loose - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |