[Lazarus] Can't copy TMemoryStream to TProcess.Input

[Michael Van Canneyt]

On Sat, 6 Apr 2013, Leonardo M. Ramé wrote:

> On 2013-04-07 00:04:45 +0200, Michael Van Canneyt wrote:
>>
>>
>> On Sat, 6 Apr 2013, Leonardo M. Ramé wrote:
>>
>>> On 2013-04-06 13:22:39 -0300, Leonardo M. Ramé wrote:
>>>> On 2013-04-06 17:46:06 +0200, Mattias Gaertner wrote:
>>>>> On Sat, 6 Apr 2013 12:37:06 -0300
>>>>> Leonardo M. Ramé <l.rame at griensu.com> wrote:
>>>>>
>>>>>> [...]
>>>>>>> Check return value of Proc.Input.Write.
>>>>>>> And call Proc.CloseInput when your input was written completely.
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> Mmm, I'm getting the same result.
>>>>>>
>>>>>> I attached the new code.
>>>>>
>>>>> When you give Proc.Input.Write 200 bytes and it returns that the other
>>>>> process could only process 100 of them. What bytes do you have to write
>>>>> next?
>>>>>
>>>>
>>>> Sorry, I'm not getting it. Which other process?, apart from that,
>>>> Proc.Input.Write is always returning the sizeof(buffer) except when it
>>>> reaches the end, where it can be less than it.
>>>>
>>>> It seems that the Proc.Input part is ok, aparently the Proc.Output is
>>>> wrong :(
>>>>
>>>> I attached a slightly modified code.
>>>>
>>>
>>> Finally got it working, I was forgetting to read the last part of the
>>> Output stream. ...I still don't know why this last chunk of bytes
>>> doesn't show up in NumBytesAvailable.
>>
>> NumBytesAvailable is inherently unreliable. I didn't like it's addition.
>>
>> You should never use it in critical code.
>>
>> Michael.
>
> Maybe that's why the same program doesn't work on FreeBSD?. What can I
> use instead of it?.

Read until the number of read bytes is zero.

Michael.