About fwrite(s, 0, 1, fp)

[H.J. Lu]

> |> However, I just checked the Single Unix specification
> |> ( http://www.rdg.opengroup.org:80/onlinepubs/7908799/ ), and discovered
> |> for fwrite():
> |> 
> |>           The fwrite() function returns the number of members
> |>      successfully written, which may be less than nitems if a write error
> |>                                                         ^ note no `only' here!
> |>      is encountered. If size or nitems is 0, fwrite() returns 0 and the
> |>      state of the stream remains unchanged. Otherwise, if a write error
> |>      occurs, the error indicator for the stream is set and errno is set
> |>      to indicate the error.
> |> 
> |> So it appears to me that there is a conflict of standards here :-(.
> |> What can be done to resolve such a conflict ?  Is it advisable to
> |> contact the Open Group about it ?
> 
> Note that this standard contradicts itself in the description of fread:
> 
>     Upon successful completion, fread() returns the number of members
>     successfully read which is less than nitems only if a read error or
>                                                 ^^^^
>     end-of-file is encountered. If size or nitems is 0, fread() returns 0
>                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
> 
> So i'd say the bug is on the Open Group.
> 

ISO C must have a testcase in their test suite for this one. Can we
somehow find what it checks for return?


-- 
H.J. Lu (hjl@gnu.org)