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

[Josh Simmons <simmons.44@...>]

On Wed, Sep 7, 2011 at 4:55 AM, Enrico Colombini <erix@erix.it> wrote:
> On 06/09/2011 9.37, steve donovan wrote:
>>
>> 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!
>
> That's strange: on my XP, Lua 5.1.2 prints:
>
>  1
>  2
>  3
>  nil     No error        0
>
> Apart from the interesting "No error" error description, it seems to be as
> expected.
> errio.lua contains five lines.
>
> --
>  Enrico
>
>

The third number is the value of errno.
nil, strerror(errno), errno

Cheers,
Josh.