Re: POpen en PClose

Michael Van Canneyt via fpc-pascal <[email protected]> Mon, 20 Jul 2026 11:43:49 +0200 (CEST)

Newsgroups	gmane.comp.compilers.free-pascal.general
Message-ID	<[email protected]>


On Mon, 20 Jul 2026, Adriaan van Os via fpc-pascal wrote:

>
> I am looking at the implementation of POpen and PClose in the runtime-library 
> for Darwin (or more general for UNIX). It seems like it doesn't call into 
> libc popen and pclose, but instead follows its own implementation in unix.pp 
> in POpen_internal. I am just curious to know the reason.

- Because on linux we're independent of libc.
- IIRC the libc version uses the C FILE type, which is not compatible with
   the file descriptor we use elsewhere. Introducing that would require lots
   of wiring to handle both paths.

Michael.
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