GNU bug report logs - #69488
tr (question)

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From: lacsaP Patatetom <patatetom <at> gmail.com>
To: 69488 <at> debbugs.gnu.org
Subject: bug#69488: tr (question)
Date: Fri, 1 Mar 2024 16:33:29 +0100

[Message part 1 (text/plain, inline)]

hi,

I did a few tests with tr and I'm surprised by the results...

$ echo éèçà
éèçà

these characters are encoded in utf-8 on 2 bytes :

$ echo éèçà | xxd
00000000: c3a9 c3a8 c3a7 c3a0 0a                   .........

now I use tr to remove non-printable characters :

$ echo éèçà | tr -cd '[:print:]'
$ echo éèçà | tr -cd '[:print:]' | wc
      0       0       0

all characters are deleted by tr
now I want to keep the "é" character :

$ echo éèçà | tr -cd '[:print:]é'
��

why do the "�" characters appear ?

regards, lacsaP.

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