On Mon, 20 Jul 2026, Marco van de Voort via fpc-pascal wrote:
Op 20-7-2026 om 10:13 schreef Adriaan van Os via fpc-pascal:
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.
Phew, that was over twenty years ago, but afaik the reason is that libc popen
and pclose us C FILE descriptors, which the RTL in general doesn't use to
avoid a mix of functions with pascal and C file types.
So popen/pclose are a more high level (FILE * using) part of libc, while we
tend to only use the basis.
Glad our memories agree on this :-)
Michael.
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