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... you could overload syswrite to unpack the data into bytes before invoking the real syswrite...
Which is just what encoding layers exist for:
% perl -C0 -we 'syswrite(STDOUT, chr(0x500), 1)' | wc -c Wide character in syswrite at -e line 1. 0 Exit 255 % perl -CS -we 'syswrite(STDOUT, chr(0xE9), 1)' | wc -c 2 % perl -CS -we 'syswrite(STDOUT, chr(0x1000), 1)' | wc -c 3 % perl -CS -we 'syswrite(STDOUT, chr(0x01_0000), 1)' | wc -c 4 % perl -CS -we 'syswrite(STDOUT, chr(0x0100_0000), 1)' | wc -c 5 % perl -CS -we 'syswrite(STDOUT, chr(0x1000_0000), 1)' | wc -c 6 % perl -CS -we 'syswrite(STDOUT, chr(0xF000_0000), 1)' | wc -c 7 % perl -CS -M-warnings=portable -we 'syswrite(STDOUT, chr(0x10_0000_00 +00), 1)' | wc -c 13

In reply to Re^2: Simplest Possible Way To Disable Unicode by tchrist
in thread Simplest Possible Way To Disable Unicode by JapanIsShinto

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