That's not how I see it. I see the
system-ed perl as an autonomous process (unknowing of its parent process) with its STDOUT filehandle set with different encodings.
In both cases, we're printing out a string with one character at codepoint U+00FF.
The second
system-ed perl has its output encoding set to UTF-8 (via
-CO). What octets do we send out into the cruel world for U+00FF character encoded in UTF-8? Ans:
c3 bf.
The first
system-ed perl has its output "set" to byte/Latin-1 encoding (the default). What octets do we send out into the cruel world for U+00FF character encoded in Latin-1? Ans:
ff.
The first case did not print
c3 bf just because of the parent
perl -CO because the
system print did not go through the parent's perlio.
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