server: Don't enforce mailslots path format in ntdll, only in the server.

dlls/ntdll/file.c

@@ -2187,8 +2187,6 @@ NTSTATUS WINAPI NtCreateMailslotFile(PHANDLE pHandle, ULONG DesiredAccess,
      PLARGE_INTEGER TimeOut)
 {
     LARGE_INTEGER timeout;
-    static const WCHAR leadin[] = {
-        '\\','?','?','\\','M','A','I','L','S','L','O','T','\\'};
     NTSTATUS ret;
 
     TRACE("%p %08x %p %p %08x %08x %08x %p\n",
@@ -2196,18 +2194,9 @@ NTSTATUS WINAPI NtCreateMailslotFile(PHANDLE pHandle, ULONG DesiredAccess,
               CreateOptions, MailslotQuota, MaxMessageSize, TimeOut);
 
     if (!pHandle) return STATUS_ACCESS_VIOLATION;
-
     if (!attr) return STATUS_INVALID_PARAMETER;
-
     if (!attr->ObjectName) return STATUS_OBJECT_PATH_SYNTAX_BAD;
 
-    if (attr->ObjectName->Length < sizeof(leadin) ||
-        strncmpiW( attr->ObjectName->Buffer, 
-                   leadin, sizeof(leadin)/sizeof(leadin[0]) ))
-    {
-        return STATUS_OBJECT_NAME_INVALID;
-    }
-
     /*
      *  For a NULL TimeOut pointer set the default timeout value
      */

server/mailslot.c

@@ -345,7 +345,11 @@ static struct mailslot *create_mailslot( struct directory *root,
 
     if (!name || !name->len) return alloc_object( &mailslot_ops );
 
-    if (!(obj = find_object_dir( root, name, attr, &new_name ))) return NULL;
+    if (!(obj = find_object_dir( root, name, attr, &new_name )))
+    {
+        set_error( STATUS_OBJECT_NAME_INVALID );
+        return NULL;
+    }
 
     if (!new_name.len)
     {
@@ -362,7 +366,7 @@ static struct mailslot *create_mailslot( struct directory *root,
 
     if (obj->ops != &mailslot_device_ops)
     {
-        set_error( STATUS_OBJECT_TYPE_MISMATCH );
+        set_error( STATUS_OBJECT_NAME_INVALID );
         release_object( obj );
         return NULL;
     }