Messages in this thread | | | From | "Nikita V. Youshchenko" <> | Subject | Extended error reporting to user space? | Date | Tue, 16 Feb 2010 15:20:26 +0300 |
| |
Hi
I'm developing a device driver that, in it's ioctl()s, accepts a complex data structure. Before doing it's operation, it performs large number of checks if data is valid. If one of those checks fail, driver returns -EINVAL.
Unfortunately this -EINVAL is not really useful. E.g. if a developer, sitting in his IDE and debugging his code, will see ioctl() returning -EINVAL, and will have hard times finding what exactly is wrong.
Before inventing driver-specific extended error reporting, I'd like to ask if there is anything more or less generic for this. I believe situation when -Exxx is too weak interface for error reporting is common.
Nikita
| |