[fpc-devel] Tprocess using pipes, handle = 0

Martin Frb lazarus at mfriebe.de
Tue Mar 17 22:06:37 CET 2015

On 17/03/2015 21:04, Martin Frb wrote:
> On 17/03/2015 21:00, Marco van de Voort wrote:
>>> Or could an Handle (active/all ok) be 0?
>> 0 is standard input.
> Ah, except, if stdiin is closed, it can go to whatever handle is next....

Are there any values that are known to be ont a handle?

On windows codetools find InvalidHandleValue = -1
But on Linux I found nothing like this.

Given that fpselect is documented to have a bit-array of 256 bits, I 
would guess only 0 to 255 are valid? Though of course that may change...

What about -1 or negative in generic?

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