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From: Lawrence D'Oliveiro <ldo@nz.invalid>
Newsgroups: comp.unix.shell,comp.unix.programmer,comp.lang.misc
Subject: Re: Python (was Re: I did not inhale)
Date: Sun, 25 Aug 2024 22:02:56 -0000 (UTC)
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On Sun, 25 Aug 2024 13:41:50 -0000 (UTC), vallor wrote:

> On this Linux system, "man 7 unix", in the section "SCM_RIGHTS", it
> explains how the passing mechanism is handled.  One paragraph reads:
> 
>               Commonly, this operation is referred to as "passing  a
>               file  descriptor"  to  another process.  However, more
>               accurately, what is being passed is a reference to  an
>               open  file  description  (see open(2)), and in the re‐
>               ceiving process it is likely that a different file de‐
>               scriptor  number will be used.

Note the distinction between “file description” (the in-kernel data 
structure that stores the context about the open file), and “file 
descriptor” (the userland reference to the file description).