Revert "Merge branch 'rickard/null-char-filenames/ERL-370/OTP-14543' into maint"

This reverts commit 0717a2194e863f3a78595184ccc5637697f03353, reversing
changes made to 71a40658a0cef8b3e25df3a8e48a72d0563a89bf.

3 files changed, 5 insertions, 37 deletions

diff --git a/lib/kernel/doc/src/file.xml b/lib/kernel/doc/src/file.xml
index 593bee74fe..b674b3ca93 100644
--- a/lib/kernel/doc/src/file.xml
+++ b/lib/kernel/doc/src/file.xml
@@ -59,7 +59,7 @@
     terminal supports UTF-8, otherwise <c>latin1</c>. The default can
     be overridden using <c>+fnl</c> (to force <c>latin1</c> mode)
     or <c>+fnu</c> (to force <c>utf8</c> mode) when starting
-    <seealso marker="erts:erl"><c>erl</c></seealso>.</p>
+    <seealso marker="erts:erl"><c>erts:erl</c></seealso>.</p>
 
     <p>On operating systems with transparent naming, files can be
     inconsistently named, for example, some files are encoded in UTF-8 while
@@ -81,22 +81,6 @@
 
     <p>See also section <seealso marker="stdlib:unicode_usage#notes-about-raw-filenames">Notes About Raw Filenames</seealso> in the STDLIB User's Guide.</p>
 
-    <note><p>
-      File operations used to accept filenames containing
-      null characters (integer value zero). This caused
-      the name to be truncated at the first null character.
-      Filenames containing null characters inside the filename
-      are now <em>rejected</em> and will cause primitive
-      file operations fail.
-    </p></note>
-    <warning><p>
-      Currently null characters at the end of the filename
-      will be accepted by primitive file operations. Such
-      filenames are however still documented as invalid. The
-      implementation will also change in the future and
-      reject such filenames.
-    </p></warning>
-
   </description>
 
   <datatypes>
@@ -112,21 +96,9 @@
     </datatype>
     <datatype>
       <name name="filename"/>
-      <desc>
-        <p>
-	  See also the documentation of the
-	  <seealso marker="#type-name_all"><c>name_all()</c></seealso> type.
-	</p>
-      </desc>
     </datatype>
     <datatype>
       <name name="filename_all"/>
-      <desc>
-        <p>
-	  See also the documentation of the
-	  <seealso marker="#type-name_all"><c>name_all()</c></seealso> type.
-	</p>
-      </desc>
     </datatype>
     <datatype>
       <name name="io_device"/>
@@ -140,23 +112,21 @@
       <name name="name"/>
       <desc>
         <p>If VM is in Unicode filename mode, <c>string()</c> and <c>char()</c>
-          are allowed to be &gt; 255. See also the documentation of the
-	  <seealso marker="#type-name_all"><c>name_all()</c></seealso> type.
+          are allowed to be &gt; 255.
         </p>
       </desc>
     </datatype>
     <datatype>
       <name name="name_all"/>
       <desc>
-        <p>If VM is in Unicode filename mode, characters
+        <p>If VM is in Unicode filename mode, <c>string()</c> and <c>char()</c>
           are allowed to be &gt; 255.
           <c><anno>RawFilename</anno></c> is a filename not subject to
           Unicode translation,
           meaning that it can contain characters not conforming to
           the Unicode encoding expected from the file system
           (that is, non-UTF-8 characters although the VM is started
-          in Unicode filename mode). Null characters (integer value zero)
-	  are <em>not</em> allowed in filenames (not even at the end).
+          in Unicode filename mode).
         </p>
       </desc>
     </datatype>
diff --git a/lib/kernel/src/kernel.app.src b/lib/kernel/src/kernel.app.src
index b5e5f8eb73..2a88cc7e26 100644
--- a/lib/kernel/src/kernel.app.src
+++ b/lib/kernel/src/kernel.app.src
@@ -120,6 +120,6 @@
   {applications, []},
   {env, [{error_logger, tty}]},
   {mod, {kernel, []}},
-  {runtime_dependencies, ["erts-9.1.1", "stdlib-3.4.3", "sasl-3.0"]}
+  {runtime_dependencies, ["erts-9.1", "stdlib-3.4", "sasl-3.0"]}
  ]
 }.
diff --git a/lib/kernel/test/file_name_SUITE.erl b/lib/kernel/test/file_name_SUITE.erl
index f23529fec9..899102c908 100644
--- a/lib/kernel/test/file_name_SUITE.erl
+++ b/lib/kernel/test/file_name_SUITE.erl
@@ -302,9 +302,7 @@ check_normal(Mod) ->
 	      {ok, BC} = Mod:read(FD,1024),
 	      ok = file:close(FD)
 	  end || {regular,Name,Content} <- NormalDir ],
-	{error, badarg} = Mod:rename("fil1\0tmp_fil2","tmp_fil1"),
 	Mod:rename("fil1","tmp_fil1"),
-	{error, badarg} = Mod:read_file("tmp_fil1\0.txt"),
 	{ok, <<"fil1">>} = Mod:read_file("tmp_fil1"),
 	{error,enoent} = Mod:read_file("fil1"),
 	Mod:rename("tmp_fil1","fil1"),