Equivalence classes don't work Post: 303041994

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Top Forums Shell Programming and Scripting Equivalence classes don't work Post 303041994 by Cacializ on Tuesday 10th of December 2019 04:52:49 PM

12-10-2019

Registered User

Equivalence classes don't work

Hello:
I can't get equivalence classes to work in globs or when passing them to tr. If I understood correctly, [=e=] matches e, é, è, ê, etc. But when using them with utilities like tr they don't work. Here's an example found in the POSIX standard:

Quote:

This example uses an equivalence class to identify accented variants of the base character 'e' in file1, which are stripped of diacritical marks and written to file2.

Code:

tr "[=e=]" "[e*]" <file1 >file2

I decided to create the aforementioned files in order show the results. Here's the contents of file1:

Code:

Estrés
Miraré

And these are the results in a GNU/Linux and a Solaris machine:

Code:

$ uname -a
Linux sigma 4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u2 (2019-11-11) x86_64 GNU/Linux

$ locale
LANG=es_ES.UTF-8
LANGUAGE=
LC_CTYPE="es_ES.UTF-8"
LC_NUMERIC="es_ES.UTF-8"
LC_TIME="es_ES.UTF-8"
LC_COLLATE="es_ES.UTF-8"
LC_MONETARY="es_ES.UTF-8"
LC_MESSAGES="es_ES.UTF-8"
LC_PAPER="es_ES.UTF-8"
LC_NAME="es_ES.UTF-8"
LC_ADDRESS="es_ES.UTF-8"
LC_TELEPHONE="es_ES.UTF-8"
LC_MEASUREMENT="es_ES.UTF-8"
LC_IDENTIFICATION="es_ES.UTF-8"
LC_ALL=

$ tr "[=e=]" "[e*]" <file1 >file2

$ cat file2
Estrés
Miraré

Code:

$ uname -a
SunOS solaris 5.11 11.3 i86pc i386 i86pc

$ locale
LANG=es_ES.UTF-8
LC_CTYPE="es_ES.UTF-8"
LC_NUMERIC="es_ES.UTF-8"
LC_TIME="es_ES.UTF-8"
LC_COLLATE="es_ES.UTF-8"
LC_MONETARY="es_ES.UTF-8"
LC_MESSAGES="es_ES.UTF-8"
LC_ALL=

$ tr "[=e=]" "[e*]" <file1 >file2

$ cat file2
Estrés
Miraré

Why aren't the accented e's replaced?

GNU tr doesn't support multi-byte characters, but the Solaris implementation does:

Code:

$ printf 'Estrés\n' | tr '[:lower:]' '[:upper:]'
ESTRÉS

So I don't know why it's failing on Solaris. Am I using equivalence classes correctly?
Thanks in advance.

Cacializ

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