[Bug 217821] document that Linux' open(2) uses ENXIO in case of sockets, while POSIX mandates EOPNOTSUPP

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=217821

--- Comment #1 from Alejandro Colomar (colomar.6.4.3@gmail.com) ---
Hi Chris,

On 2023-08-25 03:07, bugzilla-daemon@kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=217821
> 
>             Bug ID: 217821
>            Summary: document that Linux' open(2) uses ENXIO in case of
>                     sockets, while POSIX mandates EOPNOTSUPP
>            Product: Documentation
>            Version: unspecified
>           Hardware: All
>                 OS: Linux
>             Status: NEW
>           Severity: enhancement
>           Priority: P3
>          Component: man-pages
>           Assignee: documentation_man-pages@kernel-bugs.osdl.org
>           Reporter: calestyo@scientia.org
>         Regression: No
> 
> Hey.
> 
> It seems that under Linux, when using a socket file with the open(2) family
> of
> functions, the error is:
>> ENXIO  The file is a UNIX domain socket.
> 
> OTOH, POSIX specifies[0]:
>> [EOPNOTSUPP]
>>    The path argument names a socket.
> 
> 
> Maybe it makes sense to document that? Possibly right at the ENXIO descripton
> and even additionally in the STANDARDS section?
> 
> I could write a patch if you tell me which you like.

Sure.  Please check the ./CONTRIBUTING file in the repository.

Cheers,
Alex

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