[erlang-patches] Correct ls/1 in c.erl

Björn Gustavsson <>
Wed May 22 12:22:06 CEST 2013


We found the idea of improving c:ls/1 worthwhile.

Therefore, we will not simply reject the patch.

Instead we will use the implementation in the following
commit:


https://github.com/bjorng/otp/commit/67d83e15fdee068217df7f14a32fb901d7d4d91b

in which I have credited Bengt for the idea and test case.

We will test it a few days in our daily builds before merging
it to maint.

/Bjorn



On Mon, May 20, 2013 at 4:40 PM, Bengt Kleberg
<>wrote:

> I do not know why file:list_dir/1 has failed with {error, enoent}.
> Or to be precise, I do not know what failure with {error, enoent} means
> for the different cases I get from directories, files, links, special
> files, none-existing files and the combination of read/no-read access
> for these.
>
>
> bengt
>
> On Mon, 2013-05-20 at 16:36 +0200, Björn Gustavsson wrote:
> > I'll try to clarify my question:
> >
> >
> >
> > Why test for existence at all if
> > file:list_dir/1 has already told you that the
> > file exists?
> >
> >
> > On Mon, May 20, 2013 at 4:22 PM, Bengt Kleberg
> > <> wrote:
> >
> >
> >         The filelib:is_dir/is_file/is_regular functions confuse me. I
> >         am unsure
> >         what they will return for directories, files, links, special
> >         files,
> >         none-existing files and the combination of read/no-read access
> >         for
> >         these.
> >
> >         file:read_link_info/1 is more predictable.
> >
> >
> >         bengt
> >
> >         On Mon, 2013-05-20 at 15:59 +0200, Björn Gustavsson wrote:
> >         > On Mon, May 20, 2013 at 1:45 PM, Bengt Kleberg
> >         > <> wrote:
> >         >         6> file:list_dir("nosuchfile").
> >         >         {error,enotdir}
> >         >
> >         >         I think to use file:read_link_info/1 to establish
> >         the
> >         >         existence of the
> >         >         file/directory.
> >         >
> >         > Why?
> >         >
> >         >
> >         > If file:list_dir(Name) returns {error,enotdir}, it means
> >         that
> >         > there exists a file named Name (but it is not a directory).
> >         >
> >         >
> >         > If no such file exists, the return value will be
> >         {error,enoent}.
> >         >
> >         >
> >         > In what situation would it be useful to call
> >         > file:read_link_info/1?
> >         >
> >         >
> >         >
> >         > --
> >         > Björn Gustavsson, Erlang/OTP, Ericsson AB
> >
> >
> >
> >
> >
> >
> > --
> > Björn Gustavsson, Erlang/OTP, Ericsson AB
>
>


-- 
Björn Gustavsson, Erlang/OTP, Ericsson AB
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