[Ecls-list] Lisp errors & ERRNO

[Tobias C. Rittweiler]

"Tobias C. Rittweiler" <tcr at freebits.de>
writes:

> Juan Jose Garcia-Ripoll
> <juanjose.garciaripoll at googlemail.com> writes:
>
>> On Mon, Mar 15, 2010 at 6:07 PM, Tobias C. Rittweiler <tcr at freebits.de>wrote:
>>
>>> I'm talking about Lisp sugar on top of strerror for that and similiar
>>> cases.
>>>
>>
>> I now see what you mean. I would use conditions that derive from
>> simple-error and include the errno and the message. We can provide a lisp
>> function, ext:strerror. Then FElibc_error() and other functions
>> (serve-event) can signal the error using cl_error, the name of the condition
>> and a list of arguments, like we already do for other conditions.
>
> So:
>
>   * make strerror available to Lisp as ext:strerror
>
>   * introduce new condition type (perhaps ERROR-WITH-ERRNO?) and make it
>     have an errno slot. I think an condition type could come handy.
>
>   * modify FElibc_error to use @'cl:error', @'ext:strerror', and signal
>     an ERROR-WITH-ERRNO.
>
> D'accord?

SYSCALL-ERROR is probably a better name; the slot reader name
SYSCALL-ERROR-ERRNO looks way better than the stuttering
ERROR-WITH-ERRNO-ERRNO.

  -T.