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

Björn Gustavsson <>
Mon May 20 16:36:54 CEST 2013


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
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