At 2022-08-02T15:44:21+0200, Ingo Schwarze wrote: > In groff, this works for me: > > $ printf "a\\\\N'9'b" | groff -T ascii | hexdump -C | head -n 1 > 00000000 61 09 62 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a |a.b.............| > > Mandoc behaves differently and treats \N'9' exactly like a literal HT: > > $ printf "a\\\\N'9'b" | mandoc | hexdump -C | grep 61 > 00000050 61 20 20 20 20 62 0a 0a 20 20 20 20 20 20 20 20 |a b.. | > > In general, mandoc lets fewer control characters sneak through into > output than groff because i worry that control characters in output > might occasionally cause reliability or security issues.
I don't predict high reliability from this technique when attempting it on a platform that uses IBM code page 1047 as its input encoding. ;-) Regards, Branden
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