https://debbugs.gnu.org/61129

From af8ed66e00bfac4a189ea32c62199bffaa3eb836 Mon Sep 17 00:00:00 2001
From: Kerin Millar <kfm@plushkava.net>
Date: Sun, 29 Jan 2023 00:34:27 +0000
Subject: [PATCH] Use any available UTF-8 locale in t0251; skip if none found

The "t0251-gpt-unicode.sh" test presently suffers from several issues
which are addressed herewith.

Do not begin by trying to match the "en_US.utf8" locale specifically.
The only requirement for the test to be conducted correctly is that the
system character type be set to UTF-8. For this, _any_ UTF-8 supporting
locale will do. Simply select the first locale that ends with ".utf8"
or "UTF-8". After all, not everyone is American, nor do all systems
using GNU glibc yet have a C.UTF-8 locale.

Escape the dot/period in the locale-matching regular expression.

Skip the test outright if no UTF-8 supporting locale can be found,
rather than spuriously fail.

Assign the locale found to LC_CTYPE. There is no need to set any of the
other locale-related environment variables for the purpose of this
test. To guarantee that LC_CTYPE takes effect, unset LC_ALL also.

Signed-off-by: Kerin Millar <kfm@plushkava.net>
Bug: https://bugs.gentoo.org/753677
--- a/tests/t0251-gpt-unicode.sh
+++ b/tests/t0251-gpt-unicode.sh
@@ -17,16 +17,21 @@
 
 . "${srcdir=.}/init.sh"; path_prepend_ ../parted
 
+# LC_CTYPE must not be overridden
+unset LC_ALL
+
+# any UTF-8 locale will suffice for setting the character type
+LC_CTYPE=$(locale -a | awk '/\.(utf8|UTF-8)$/ { print; exit; }')
+if [ -z "$LC_CTYPE" ]; then
+	skip_ 'no UTF-8 supporting locale is available'
+fi
+export LC_CTYPE
+
 dev=loop-file
 
 # create zeroed device
 truncate -s 10m $dev || fail=1
 
-LC_ALL=$(locale -a | grep en_US.utf8)
-if [ -z "$LC_ALL" ]; then
-   LC_ALL=C.UTF-8
-fi
-export LC_ALL="$LC_ALL"
 # create gpt label with named partition
 part_name=$(printf 'foo\341\264\244')
 parted -s $dev mklabel gpt mkpart primary ext2 1MiB 2MiB name 1 $part_name > empty 2>&1 || fail=1
-- 
2.39.1