ZTS: Casenorm fix unicode interpretation

Use `printf` to properly interpret unicode characters.

Illumos uses a utility called `zlook` to allow additional flags to be
provided to readdir and lookup for testing.  This functionality could
be ported to Linux, but even without it several of the tests can be
enabled by instead using the standard `test` command.

Additional, work is required to enable the remaining test cases.

Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: George Melikov <mail@gmelikov.ru>
Issue openzfs#7633
Closes openzfs#8812

tests/test-runner/bin/zts-report.py

@@ -160,17 +160,9 @@
 # reasons listed above can be used.
 #
 known = {
-    'casenorm/sensitive_none_lookup': ['FAIL', '7633'],
-    'casenorm/sensitive_none_delete': ['FAIL', '7633'],
     'casenorm/sensitive_formd_lookup': ['FAIL', '7633'],
     'casenorm/sensitive_formd_delete': ['FAIL', '7633'],
-    'casenorm/insensitive_none_lookup': ['FAIL', '7633'],
-    'casenorm/insensitive_none_delete': ['FAIL', '7633'],
-    'casenorm/insensitive_formd_lookup': ['FAIL', '7633'],
-    'casenorm/insensitive_formd_delete': ['FAIL', '7633'],
-    'casenorm/mixed_none_lookup': ['FAIL', '7633'],
     'casenorm/mixed_none_lookup_ci': ['FAIL', '7633'],
-    'casenorm/mixed_none_delete': ['FAIL', '7633'],
     'casenorm/mixed_formd_lookup': ['FAIL', '7633'],
     'casenorm/mixed_formd_lookup_ci': ['FAIL', '7633'],
     'casenorm/mixed_formd_delete': ['FAIL', '7633'],

tests/zfs-tests/tests/functional/casenorm/casenorm.cfg

@@ -17,12 +17,16 @@
 # Copyright (c) 2016 by Delphix. All rights reserved.
 #
 
-NAME_C_ORIG=$(echo 'F\0303\0257L\0303\0253N\0303\0204m\0303\0253')
-NAME_C_UPPER=$(echo 'F\0303\0217L\0303\0213N\0303\0204M\0303\0213')
-NAME_C_LOWER=$(echo 'f\0303\0257l\0303\0253n\0303\0244m\0303\0253')
-NAME_D_ORIG=$(echo 'Fi\0314\0210Le\0314\0210NA\0314\0210me\0314\0210')
-NAME_D_UPPER=$(echo 'FI\0314\0210LE\0314\0210NA\0314\0210ME\0314\0210')
-NAME_D_LOWER=$(echo 'fi\0314\0210le\0314\0210na\0314\0210me\0314\0210')
+# Ksh on linux may have locale env variables undefined
+export LANG="C.UTF-8"
+export LC_ALL="C.UTF-8"
+
+NAME_C_ORIG=$(printf '\u0046\u00ef\u004c\u00eb\u004e\u00c4\u006d\u00eb')
+NAME_C_UPPER=$(printf '\u0046\u00cf\u004c\u00cb\u004e\u00c4\u004d\u00cb')
+NAME_C_LOWER=$(printf '\u0066\u00ef\u006c\u00eb\u006e\u00e4\u006d\u00eb')
+NAME_D_ORIG=$(printf '\u0046\u0069\u0308\u004c\u0065\u0308\u004e\u0041\u0308\u006d\u0065\u0308')
+NAME_D_UPPER=$(printf '\u0046\u0049\u0308\u004c\u0045\u0308\u004e\u0041\u0308\u004d\u0045\u0308')
+NAME_D_LOWER=$(printf '\u0066\u0069\u0308\u006c\u0065\u0308\u006e\u0061\u0308\u006d\u0065\u0308')
 NAMES_ORIG="$NAME_C_ORIG $NAME_D_ORIG"
 NAMES_UPPER="$NAME_C_UPPER $NAME_D_UPPER"
 NAMES_LOWER="$NAME_C_LOWER $NAME_D_LOWER"

tests/zfs-tests/tests/functional/casenorm/casenorm.kshlib

@@ -65,14 +65,22 @@ function lookup_file
 {
 	typeset name=$1
 
-	zlook -l $TESTDIR $name >/dev/null 2>&1
+	if is_linux; then
+		test -f "${TESTDIR}/${name}" >/dev/null 2>&1
+	else
+		zlook -l $TESTDIR $name >/dev/null 2>&1
+	fi
 }
 
 function lookup_file_ci
 {
 	typeset name=$1
 
-	zlook -il $TESTDIR $name >/dev/null 2>&1
+	if is_linux; then
+		test -f "${TESTDIR}/${name}" >/dev/null 2>&1
+	else
+		zlook -il $TESTDIR $name >/dev/null 2>&1
+	fi
 }
 
 function lookup_any