lib/util/charset: Remove 'display charset'

As discussed in 'CH_DISPLAY and gettext' on the samba-technical list:
http://lists.samba.org/archive/samba-technical/2011-June/078190.html

Setting this to a value other than 'unix charset' does not make sense,
as any system where the filesytem charset does not equal the terminal
charset will already have problems with programs as simple as 'ls'.
It also means that our output could not be pasted as our input in
interactive programs or onto our command line, as we never did
translate in the DISPLAY -> UNIX direction.

The d_printf() calls are retained in case we need to revisit this, and
to support display_set_stderr().

Andrew Bartlett

4 files changed, 60 insertions, 69 deletions

diff --git a/lib/util/charset/charset.h b/lib/util/charset/charset.h
index a7e554204b..b36c461003 100644
--- a/lib/util/charset/charset.h
+++ b/lib/util/charset/charset.h
@@ -28,7 +28,7 @@
 #include <talloc.h>
 
 /* this defines the charset types used in samba */
-typedef enum {CH_UTF16LE=0, CH_UTF16=0, CH_UNIX, CH_DISPLAY, CH_DOS, CH_UTF8, CH_UTF16BE, CH_UTF16MUNGED} charset_t;
+typedef enum {CH_UTF16LE=0, CH_UTF16=0, CH_UNIX, CH_DOS, CH_UTF8, CH_UTF16BE, CH_UTF16MUNGED} charset_t;
 
 #define NUM_CHARSETS 7
 
@@ -182,8 +182,7 @@ extern struct smb_iconv_handle *global_iconv_handle;
 struct smb_iconv_handle *get_iconv_handle(void);
 struct smb_iconv_handle *get_iconv_testing_handle(TALLOC_CTX *mem_ctx, 
 						  const char *dos_charset, 
-						  const char *unix_charset, 
-						  const char *display_charset);
+						  const char *unix_charset);
 smb_iconv_t get_conv_handle(struct smb_iconv_handle *ic,
 			    charset_t from, charset_t to);
 const char *charset_name(struct smb_iconv_handle *ic, charset_t ch);
@@ -212,7 +211,6 @@ int codepoint_cmpi(codepoint_t c1, codepoint_t c2);
 struct smb_iconv_handle *smb_iconv_handle_reinit(TALLOC_CTX *mem_ctx,
 							   const char *dos_charset,
 							   const char *unix_charset,
-							   const char *display_charset,
 							   bool native_iconv,
 							   struct smb_iconv_handle *old_ic);
 
diff --git a/lib/util/charset/codepoints.c b/lib/util/charset/codepoints.c
index 71611bfc4c..305bfd717f 100644
--- a/lib/util/charset/codepoints.c
+++ b/lib/util/charset/codepoints.c
@@ -168,17 +168,16 @@ struct smb_iconv_handle *get_iconv_handle(void)
 {
 	if (global_iconv_handle == NULL)
 		global_iconv_handle = smb_iconv_handle_reinit(talloc_autofree_context(),
-									"ASCII", "UTF-8", "ASCII", true, NULL);
+							      "ASCII", "UTF-8", true, NULL);
 	return global_iconv_handle;
 }
 
 struct smb_iconv_handle *get_iconv_testing_handle(TALLOC_CTX *mem_ctx, 
 						  const char *dos_charset, 
-						  const char *unix_charset, 
-						  const char *display_charset)
+						  const char *unix_charset)
 {
 	return smb_iconv_handle_reinit(mem_ctx,
-				       dos_charset, unix_charset, display_charset, true, NULL);
+				       dos_charset, unix_charset, true, NULL);
 }
 
 /**
@@ -190,7 +189,6 @@ const char *charset_name(struct smb_iconv_handle *ic, charset_t ch)
 	case CH_UTF16: return "UTF-16LE";
 	case CH_UNIX: return ic->unix_charset;
 	case CH_DOS: return ic->dos_charset;
-	case CH_DISPLAY: return ic->display_charset;
 	case CH_UTF8: return "UTF8";
 	case CH_UTF16BE: return "UTF-16BE";
 	case CH_UTF16MUNGED: return "UTF16_MUNGED";
@@ -261,14 +259,11 @@ static const char *map_locale(const char *charset)
 _PUBLIC_ struct smb_iconv_handle *smb_iconv_handle_reinit(TALLOC_CTX *mem_ctx,
 								    const char *dos_charset,
 								    const char *unix_charset,
-								    const char *display_charset,
 								    bool native_iconv,
 								    struct smb_iconv_handle *old_ic)
 {
 	struct smb_iconv_handle *ret;
 
-	display_charset = map_locale(display_charset);
-
 	if (old_ic != NULL) {
 		ret = old_ic;
 		close_iconv_handle(ret);
@@ -297,7 +292,6 @@ _PUBLIC_ struct smb_iconv_handle *smb_iconv_handle_reinit(TALLOC_CTX *mem_ctx,
 
 	ret->dos_charset = talloc_strdup(ret->child_ctx, dos_charset);
 	ret->unix_charset = talloc_strdup(ret->child_ctx, unix_charset);
-	ret->display_charset = talloc_strdup(ret->child_ctx, display_charset);
 	ret->native_iconv = native_iconv;
 
 	return ret;
diff --git a/lib/util/charset/tests/convert_string.c b/lib/util/charset/tests/convert_string.c
index bd140d59db..9a5d974fe3 100644
--- a/lib/util/charset/tests/convert_string.c
+++ b/lib/util/charset/tests/convert_string.c
@@ -105,7 +105,7 @@ static bool test_gd_iso8859_cp850_handle(struct torture_context *tctx)
 	talloc_steal(tctx, gd_iso8859_1.data);
 	talloc_steal(tctx, gd_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850");
 	torture_assert(tctx, iconv_handle, "getting iconv handle");
 		
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
@@ -199,11 +199,11 @@ static bool test_gd_iso8859_cp850_handle(struct torture_context *tctx)
 	torture_assert_data_blob_equal(tctx, gd_output, gd_cp850, "conversion from UTF8 to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_UTF8, CH_DISPLAY, 
+						    CH_UTF8, CH_UTF8, 
 						    gd_utf8.data, gd_utf8.length, 
 						    (void *)&gd_output.data, &gd_output.length), 
-		       "conversion from UTF8 to (display charset) UTF8");
-	torture_assert_data_blob_equal(tctx, gd_output, gd_utf8, "conversion from UTF8 to (display charset) UTF8 incorrect");
+		       "conversion from UTF8 to UTF8");
+	torture_assert_data_blob_equal(tctx, gd_output, gd_utf8, "conversion from UTF8 to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_UTF16LE, CH_DOS, 
@@ -227,11 +227,11 @@ static bool test_gd_iso8859_cp850_handle(struct torture_context *tctx)
 	torture_assert_data_blob_equal(tctx, gd_output, gd_cp850, "conversion from UTF16LE to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_UTF16LE, CH_DISPLAY, 
+						    CH_UTF16LE, CH_UTF8, 
 						    gd_utf16le.data, gd_utf16le.length, 
 						    (void *)&gd_output.data, &gd_output.length), 
-		       "conversion from UTF16LE to (display charset) UTF8");
-	torture_assert_data_blob_equal(tctx, gd_output, gd_utf8, "conversion from UTF16LE to (display charset) UTF8 incorrect");
+		       "conversion from UTF16LE to UTF8");
+	torture_assert_data_blob_equal(tctx, gd_output, gd_utf8, "conversion from UTF16LE to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_DOS, CH_DOS, 
@@ -248,11 +248,11 @@ static bool test_gd_iso8859_cp850_handle(struct torture_context *tctx)
 	torture_assert_data_blob_equal(tctx, gd_output, gd_cp850, "conversion from UTF16LE to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_DOS, CH_DISPLAY, 
+						    CH_DOS, CH_UTF8, 
 						    gd_iso8859_1.data, gd_iso8859_1.length, 
 						    (void *)&gd_output.data, &gd_output.length), 
-		       "conversion from (dos charset) ISO8859-1 to (display charset) UTF8");
-	torture_assert_data_blob_equal(tctx, gd_output, gd_utf8, "conversion from UTF16LE to (display charset) UTF8 incorrect");
+		       "conversion from (dos charset) ISO8859-1 to UTF8");
+	torture_assert_data_blob_equal(tctx, gd_output, gd_utf8, "conversion from UTF16LE to UTF8 incorrect");
 
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_DOS, CH_UTF16LE, 
@@ -265,7 +265,7 @@ static bool test_gd_iso8859_cp850_handle(struct torture_context *tctx)
 						     (const char *)gd_iso8859_1.data,
 						     CH_DOS, CH_UTF16LE),
 				 gd_output.length / 2,
-				 "checking strlen_m_ext of round trip conversion of UTF16 latin charset greek to display charset UTF8 and back again");
+				 "checking strlen_m_ext of round trip conversion of UTF16 latin charset greek to UTF8 and back again");
 
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle,
 						    CH_DOS, CH_UTF8,
@@ -297,7 +297,7 @@ static bool test_gd_minus_1_handle(struct torture_context *tctx)
 	talloc_steal(tctx, gd_cp850.data);
 	talloc_steal(tctx, gd_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "CP850", "CP850", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "CP850", "CP850");
 	torture_assert(tctx, iconv_handle, "getting iconv handle");
 
 	gd_utf8_terminated = data_blob_talloc(tctx, NULL, gd_utf8.length + 1);
@@ -481,7 +481,7 @@ static bool test_gd_ascii_handle(struct torture_context *tctx)
 	talloc_steal(tctx, gd_iso8859_1.data);
 	talloc_steal(tctx, gd_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8");
 	torture_assert(tctx, iconv_handle, "getting iconv handle");
 
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle,
@@ -550,7 +550,7 @@ static bool test_plato_english_iso8859_cp850_handle(struct torture_context *tctx
 	
 	talloc_steal(tctx, plato_english_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850");
 	torture_assert(tctx, iconv_handle, "getting iconv handle");
 		
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
@@ -568,11 +568,11 @@ static bool test_plato_english_iso8859_cp850_handle(struct torture_context *tctx
 	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_cp850, "conversion from UTF8 to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_UTF8, CH_DISPLAY, 
+						    CH_UTF8, CH_UTF8, 
 						    plato_english_utf8.data, plato_english_utf8.length, 
 						    (void *)&plato_english_output.data, &plato_english_output.length), 
-		       "conversion from UTF8 to (display charset) UTF8");
-	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_utf8, "conversion from UTF8 to (display charset) UTF8 incorrect");
+		       "conversion from UTF8 to UTF8");
+	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_utf8, "conversion from UTF8 to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_UTF16LE, CH_DOS, 
@@ -621,11 +621,11 @@ static bool test_plato_english_iso8859_cp850_handle(struct torture_context *tctx
 	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_cp850, "conversion from UTF16LE to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_UTF16LE, CH_DISPLAY, 
+						    CH_UTF16LE, CH_UTF8, 
 						    plato_english_utf16le.data, plato_english_utf16le.length, 
 						    (void *)&plato_english_output.data, &plato_english_output.length), 
-		       "conversion from UTF16LE to (display charset) UTF8");
-	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_utf8, "conversion from UTF16LE to (display charset) UTF8 incorrect");
+		       "conversion from UTF16LE to UTF8");
+	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_utf8, "conversion from UTF16LE to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_DOS, CH_DOS, 
@@ -642,11 +642,11 @@ static bool test_plato_english_iso8859_cp850_handle(struct torture_context *tctx
 	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_cp850, "conversion from UTF16LE to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_DOS, CH_DISPLAY, 
+						    CH_DOS, CH_UTF8, 
 						    plato_english_iso8859_1.data, plato_english_iso8859_1.length, 
 						    (void *)&plato_english_output.data, &plato_english_output.length), 
-		       "conversion from (dos charset) ISO8859-1 to (display charset) UTF8");
-	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_utf8, "conversion from UTF16LE to (display charset) UTF8 incorrect");
+		       "conversion from (dos charset) ISO8859-1 to UTF8");
+	torture_assert_data_blob_equal(tctx, plato_english_output, plato_english_utf8, "conversion from UTF16LE to UTF8 incorrect");
 
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_DOS, CH_UTF16LE, 
@@ -668,7 +668,7 @@ static bool test_plato_english_minus_1_handle(struct torture_context *tctx)
 	
 	talloc_steal(tctx, plato_english_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850");
 	torture_assert(tctx, iconv_handle, "getting iconv handle");
 
 	plato_english_utf8_terminated = data_blob_talloc(tctx, NULL, plato_english_utf8.length + 1);
@@ -809,7 +809,7 @@ static bool test_plato_minus_1_handle(struct torture_context *tctx)
 	talloc_steal(tctx, plato_utf8.data);
 	talloc_steal(tctx, plato_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ISO8859-1", "CP850");
 	torture_assert(tctx, iconv_handle, "getting iconv handle");
 
 	plato_utf8_terminated = data_blob_talloc(tctx, NULL, plato_utf8.length + 1);
@@ -923,7 +923,7 @@ static bool test_plato_cp850_utf8_handle(struct torture_context *tctx)
 	talloc_steal(tctx, plato_utf8.data);
 	talloc_steal(tctx, plato_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "CP850", "UTF8", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "CP850", "UTF8");
 	torture_assert(tctx, iconv_handle, "creating iconv handle");
 		
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
@@ -1008,11 +1008,11 @@ static bool test_plato_cp850_utf8_handle(struct torture_context *tctx)
 	torture_assert_data_blob_equal(tctx, plato_output, plato_utf8, "conversion from UTF8 to (unix charset) UTF8 incorrect");
 
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_UTF8, CH_DISPLAY, 
+						    CH_UTF8, CH_UTF8, 
 						    plato_utf8.data, plato_utf8.length, 
 						    (void *)&plato_output.data, &plato_output.length),
 		       "conversion of UTF16 ancient greek to unix charset UTF8 failed");
-	torture_assert_data_blob_equal(tctx, plato_output, plato_utf8, "conversion from UTF8 to (display charset) UTF8 incorrect");
+	torture_assert_data_blob_equal(tctx, plato_output, plato_utf8, "conversion from UTF8 to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_UTF16LE, CH_DOS, 
@@ -1067,39 +1067,39 @@ static bool test_plato_cp850_utf8_handle(struct torture_context *tctx)
 		       "conversion of UTF16 ancient greek to UTF8 failed");
 	torture_assert_data_blob_equal(tctx, plato_output, plato_utf8, "conversion from UTF16LE to UTF8 incorrect");
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-							  CH_UTF16LE, CH_DISPLAY, 
+							  CH_UTF16LE, CH_UTF8, 
 							  plato_utf16le.data, plato_utf16le.length, 
 							  (void *)&plato_output.data, &plato_output.length),
-		       "conversion of UTF16 ancient greek to display charset UTF8 failed");
-	torture_assert_data_blob_equal(tctx, plato_output, plato_utf8, "conversion from UTF16LE to (display charset) UTF8 incorrect");
+		       "conversion of UTF16 ancient greek to UTF8 failed");
+	torture_assert_data_blob_equal(tctx, plato_output, plato_utf8, "conversion from UTF16LE to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-							  CH_DISPLAY, CH_UTF16LE, 
+							  CH_UTF8, CH_UTF16LE, 
 							  plato_output.data, plato_output.length, 
 							  (void *)&plato_output2.data, &plato_output2.length),
-		       "round trip conversion of UTF16 ancient greek to display charset UTF8 and back again failed");
+		       "round trip conversion of UTF16 ancient greek to UTF8 and back again failed");
 	torture_assert_data_blob_equal(tctx, plato_output2, plato_utf16le,
-				       "round trip conversion of UTF16 ancient greek to display charset UTF8 and back again failed");
+				       "round trip conversion of UTF16 ancient greek to UTF8 and back again failed");
 	torture_assert_int_equal(tctx,
 				 strlen_m_ext_handle(iconv_handle,
 						     (const char *)plato_output.data,
-						     CH_DISPLAY, CH_UTF16LE),
+						     CH_UTF8, CH_UTF16LE),
 				 plato_output2.length / 2,
-				 "checking strlen_m_ext of round trip conversion of UTF16 latin charset greek to display charset UTF8 and back again");
+				 "checking strlen_m_ext of round trip conversion of UTF16 latin charset greek to UTF8 and back again");
 
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle,
-							  CH_DISPLAY, CH_UTF8,
+							  CH_UTF8, CH_UTF8,
 							  plato_output.data, plato_output.length,
 							  (void *)&plato_output2.data, &plato_output2.length),
-		       "conversion of display charset UTF8 to UTF8");
+		       "conversion of UTF8 to UTF8");
 	torture_assert_data_blob_equal(tctx, plato_output2, plato_utf8,
-				       "conversion of display charset UTF8 to UTF8");
+				       "conversion of UTF8 to UTF8");
 	torture_assert_int_equal(tctx,
 				 strlen_m_ext_handle(iconv_handle,
 						     (const char *)plato_output.data,
-						     CH_DISPLAY, CH_UTF8),
+						     CH_UTF8, CH_UTF8),
 				 plato_output2.length,
-				 "checking strlen_m_ext of conversion of display charset UTF8 to UTF8");
+				 "checking strlen_m_ext of conversion of UTF8 to UTF8");
 	return true;
 }
 
@@ -1114,7 +1114,7 @@ static bool test_plato_latin_cp850_utf8_handle(struct torture_context *tctx)
 	talloc_steal(tctx, plato_latin_utf8.data);
 	talloc_steal(tctx, plato_latin_utf16le.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "CP850", "UTF8", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "CP850", "UTF8");
 	torture_assert(tctx, iconv_handle, "creating iconv handle");
 		
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
@@ -1131,11 +1131,11 @@ static bool test_plato_latin_cp850_utf8_handle(struct torture_context *tctx)
 	torture_assert_data_blob_equal(tctx, plato_latin_output, plato_latin_utf8, "conversion from UTF8 to (unix charset) UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-						    CH_UTF8, CH_DISPLAY, 
+						    CH_UTF8, CH_UTF8, 
 						    plato_latin_utf8.data, plato_latin_utf8.length, 
 						    (void *)&plato_latin_output.data, &plato_latin_output.length),
 		       "conversion of UTF16 latin charset greek to unix charset UTF8 failed");
-	torture_assert_data_blob_equal(tctx, plato_latin_output, plato_latin_utf8, "conversion from UTF8 to (display charset) UTF8 incorrect");
+	torture_assert_data_blob_equal(tctx, plato_latin_output, plato_latin_utf8, "conversion from UTF8 to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
 						    CH_UTF16LE, CH_DOS, 
@@ -1151,25 +1151,25 @@ static bool test_plato_latin_cp850_utf8_handle(struct torture_context *tctx)
 	torture_assert_data_blob_equal(tctx, plato_latin_output, plato_latin_utf8, "conversion from UTF16LE to (unix charset) CP850 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-							  CH_UTF16LE, CH_DISPLAY, 
+							  CH_UTF16LE, CH_UTF8, 
 							  plato_latin_utf16le.data, plato_latin_utf16le.length, 
 							  (void *)&plato_latin_output.data, &plato_latin_output.length),
-		       "conversion of UTF16 latin charset greek to display charset UTF8 failed");
-	torture_assert_data_blob_equal(tctx, plato_latin_output, plato_latin_utf8, "conversion from UTF16LE to (display charset) UTF8 incorrect");
+		       "conversion of UTF16 latin charset greek to UTF8 failed");
+	torture_assert_data_blob_equal(tctx, plato_latin_output, plato_latin_utf8, "conversion from UTF16LE to UTF8 incorrect");
 	
 	torture_assert(tctx, convert_string_talloc_handle(tctx, iconv_handle, 
-							  CH_DISPLAY, CH_UTF16LE, 
+							  CH_UTF8, CH_UTF16LE, 
 							  plato_latin_output.data, plato_latin_output.length, 
 							  (void *)&plato_latin_output2.data, &plato_latin_output2.length),
-		       "round trip conversion of UTF16 latin charset greek to display charset UTF8 and back again failed");
+		       "round trip conversion of UTF16 latin charset greek to UTF8 and back again failed");
 	torture_assert_data_blob_equal(tctx, plato_latin_output2, plato_latin_utf16le,
-				       "round trip conversion of UTF16 latin charset greek to display charset UTF8 and back again failed");
+				       "round trip conversion of UTF16 latin charset greek to UTF8 and back again failed");
 	torture_assert_int_equal(tctx,
 				 strlen_m_ext_handle(iconv_handle,
 						     (const char *)plato_latin_output.data,
-						     CH_DISPLAY, CH_UTF16LE),
+						     CH_UTF8, CH_UTF16LE),
 				 plato_latin_output2.length / 2,
-				 "checking strlen_m_ext of round trip conversion of UTF16 latin charset greek to display charset UTF8 and back again");
+				 "checking strlen_m_ext of round trip conversion of UTF16 latin charset greek to UTF8 and back again");
 	return true;
 }
 
@@ -1182,7 +1182,7 @@ static bool test_gd_case_utf8_handle(struct torture_context *tctx)
 	char *gd_lower, *gd_upper;
 	talloc_steal(tctx, gd_utf8.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8");
 	torture_assert(tctx, iconv_handle, "getting utf8 iconv handle");
 
 	torture_assert(tctx,
@@ -1245,7 +1245,7 @@ static bool test_gd_case_cp850_handle(struct torture_context *tctx)
 	char *gd_lower, *gd_upper;
 	talloc_steal(tctx, gd_cp850.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "CP850", "CP850");
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "CP850");
 	torture_assert(tctx, iconv_handle, "getting cp850 iconv handle");
 
 	torture_assert(tctx,
@@ -1306,7 +1306,7 @@ static bool test_plato_case_utf8_handle(struct torture_context *tctx)
 	char *plato_lower, *plato_upper;
 	talloc_steal(tctx, plato_utf8.data);
 
-	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8", "UTF8");
+	iconv_handle = get_iconv_testing_handle(tctx, "ASCII", "UTF8");
 	torture_assert(tctx, iconv_handle, "getting utf8 iconv handle");
 
 	torture_assert(tctx,
diff --git a/lib/util/charset/util_str.c b/lib/util/charset/util_str.c
index 80e5bde354..688ab5a0a1 100644
--- a/lib/util/charset/util_str.c
+++ b/lib/util/charset/util_str.c
@@ -169,7 +169,6 @@ _PUBLIC_ size_t strlen_m_ext_handle(struct smb_iconv_handle *ic,
 	switch (dst_charset) {
 	case CH_DOS:
 	case CH_UNIX:
-	case CH_DISPLAY:
 		smb_panic("cannot call strlen_m_ext() with a variable dest charset (must be UTF16* or UTF8)");
 	default:
 		break;