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Re: [fltk/fltk] scandir_posix.c readentry should check for ENOENT (#238)
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Re: [fltk/fltk] scandir_posix.c readentry should check for ENOENT (#238) Mark Olesen Jun 16, 2021  
 

It could also be a documentation problem since ENOENT statement contradicts
ERRORS paragraph?

On Wed, Jun 16, 2021 at 4:13 AM Albrecht Schlosser ***@***.***>
wrote:

> I disagree to your disagreement. In the man page you linked ENOENT is
> definitely mentioned under ERRORS:
>
> ERRORS
> The readdir() function shall fail if:
> ...
> The readdir() function may fail if:
> ...
> [ENOENT]
> The current position of the directory stream is invalid.
>
> I understand that this means an *unexpected invalid position* rather than
> a normal end of file (directory) indication. The man page also states:
>
> RETURN VALUE
> Upon successful completion, readdir() shall return a pointer to an object of
> type struct dirent. When an error is encountered, a null pointer shall be returned
> and errno shall be set to indicate the error. When the end of the directory
> is encountered, a null pointer shall be returned and errno is not changed.
>
> According to your description you receive ENOENT at the end of the
> directory which is clearly wrong, i.e. this is a bug in your libc (readdir)
> implementation.
>
> As I wrote before, if we changed this in our (FLTK) code we'd miss an
> error condition in a correct implementation of readdir(). I'm hesitating to
> do that.
>
> BTW, you wrote:
>
> DOS, OpenWatcom
>
> DOS is not a supported FLTK platform. Which kind of DOS is this (FreeDOS)?
>
> I'm also wondering what your graphics system is. The file in question is
> only compiled if USE_X11 is set. Are you using an X server as your
> display?
>
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