Mising ENODATA

[Willem Jan Withagen]

On 23-5-2016 22:47, John Baldwin wrote:
> On Monday, March 14, 2016 03:08:42 PM Willem Jan Withagen wrote:
>> Hi,
>>
>> According the standard is ENODATA an extention of errno.h defines...
>>
>> http://pubs.opengroup.org/onlinepubs/9699919799/
>>
>> The Open Group Base Specifications Issue 7
>> IEEE Std 1003.1, 2013 Edition
>>
>> [ENODATA]
>>      [OB XSR] [Option Start]
>>      No message available. No message is available on the STREAM head
>> read queue. [Option End]
>>
>> [XSR] [Option Start] XSI STREAMS [Option End]
>> The functionality described is optional. The functionality described is
>> also an extension to the ISO C standard.
>>
>> Where applicable, functions are marked with the XSR margin legend in the
>> SYNOPSIS section. Where additional semantics apply to a function, the
>> material is identified by use of the XSR margin legend.
>>
>> [OB] [Option Start] Obsolescent [Option End]
>> The functionality described may be removed in a future version of this
>> volume of POSIX.1-2008. Strictly Conforming POSIX Applications and
>> Strictly Conforming XSI Applications shall not use obsolescent features.
>>
>> Where applicable, the material is identified by use of the OB margin legend.
>> ----
>>
>> The OB part makes a bit strange to ask for definition, but would it be
>> possible to add ENODATA to our headers?
>> The alternative question is: why would we not?
> 
> Well, it's defined for STREAMS and FreeBSD (and BSDs in general) don't
> implement STREAMS.  OTOH, if Ceph has (ab)used it for their own internal
> errors then we could perhaps add our own ENODATA.  Do you want to make a
> patch to do so?
> 

Hi John,

Rather old Email, but now it comes to the point that it is going to be
used. Uptil now I just patched my onw errno.h, but once I'm going to
build a port for Cep, it no long works. I do not think anubody will
allow a port to modify /usr/include/errno.h 8-)

For my/Ceph needs the path is rather simple.
*** /usr/include/errno.h        Mon Oct  3 02:05:43 2016
--- /usr/srcs/head/src/sys/sys/errno.h  Sun Aug 21 18:25:05 2016
***************
*** 164,170 ****
  #define       ECANCELED       85              /* Operation canceled */
  #define       EILSEQ          86              /* Illegal byte sequence */
  #define       ENOATTR         87              /* Attribute not found */
- #define       ENODATA         87              /* Attribute not found */

  #define       EDOOFUS         88              /* Programming error */
  #endif /* _POSIX_SOURCE */
--- 164,169 ----

I'll submit this as "bug" report and will see what comes of it.

--WjW