--- bins/unzzip.c.orig	2017-05-24 12:59:01.000000000 -0500
+++ bins/unzzip.c	2017-05-24 13:24:35.000000000 -0500
@@ -14,6 +14,23 @@
 extern int unzzip_print(int argc, char** argv);
 extern int unzzip_extract(int argc, char** argv);
 
+size_t strnlen(const char *s, size_t len) 
+{ 
+    size_t i; 
+    for(i=0; i<len && *(s+i); i++); 
+    return i; 
+}
+
+char* strndup (char const *s, size_t n) 
+{ 
+    size_t len = strnlen (s, n); 
+    char *new = malloc (len + 1); 
+    if (new == NULL) 
+    return NULL; 
+    new[len] = '\0'; 
+    return memcpy (new, s, len); 
+} 
+
 static const char usage[] = 
 {
     "unzzip <dir>.. \n"