Radix cross Linux package tools

diff --git a/src/wrapper.c b/src/wrapper.c
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index 0000000..2b311aa
--- /dev/null
+++ b/src/wrapper.c
@@ -0,0 +1,75 @@
+
+/**********************************************************************
+
+  Copyright 2019 Andrey V.Kosteltsev
+
+  Licensed under the Radix.pro License, Version 1.0 (the "License");
+  you may not use this file  except  in compliance with the License.
+  You may obtain a copy of the License at
+
+     https://radix.pro/licenses/LICENSE-1.0-en_US.txt
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+  implied.
+
+ **********************************************************************/
+
+#include <config.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <error.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <stdarg.h>
+#include <unistd.h>
+
+#include <msglog.h>
+
+
+char *xstrdup( const char *str )
+{
+  char   *ret = (char *)NULL;
+  size_t  len;
+
+  if( !str ) return ret;
+
+  len = strlen( str ) + 1;
+
+  ret = (char *)malloc( len );
+  if( !ret )
+    FATAL_ERROR( "Out of memory, strdup failed (tried to allocate %lu bytes)", (unsigned long)len );
+
+  ret[len-1] = '\0';
+  ret = strncpy( ret, str, len-1 );
+  return ret;
+}
+
+void *xmalloc( size_t size )
+{
+  void *ret = NULL;
+
+  ret = malloc( size );
+  if( !ret )
+  {
+    FATAL_ERROR( "Out of memory, malloc failed (tried to allocate %lu bytes)", (unsigned long)size );
+  }
+  memset( ret, 0, size );
+  return ret;
+}
+
+void *xrealloc( void *ptr, size_t size )
+{
+  void *ret = NULL;
+
+  ret = realloc( ptr, size );
+  if( !ret && !size )
+    ret = realloc( ptr, 1 );
+  if( !ret )
+    FATAL_ERROR( "Out of memory, realloc failed" );
+  return ret;
+}