Re: file:write() fails silently for read-only files

[Lorenzo Donati <lorenzodonatibz@...>]

On 06/09/2011 9.37, steve donovan wrote:
> On Tue, Sep 6, 2011 at 9:21 AM, startx<startx@plentyfact.org>  wrote:
> >   f = io.open('foo.foo', 'r')
> >   success = f:write('ffd')
> >   f:close()
> > success will be NIL if the file cannot be written to.
>
> Ah, but not always!
>
> f = io.open('errio.lua')
> for i = 1,3 do
>    print(f:read())
> end
> print(f:write('hello dolly'))
> f:close()
>
> On this machine (Windows XP) that write returns true - a silent error!
> Must be Windows weirdness, because this script does behave as you
> expect on Linux.
>
> steve d.

If errio.lua contains just two lines:

blah
blih

I get:

blah
blih
nil
nil	No error	0


I.e.: the "write" operation kindly informs me that there was no error! 
:-) (the last 0 is another mistery).

I'm on WinXP sp2; Lua 5.1.4 and 5.2 beta produce the same result. They 
were compiled with tdm-gcc 4.5.2.

-- Lorenzo