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 #7633 
Closes #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