From a56ce2af7b82f85f22a091b2a7e75edd632cb9ce Mon Sep 17 00:00:00 2001
From: Alexander Moibenko <anm12345@gmail.com>
Date: Mon, 22 Jan 2024 18:17:22 +0300
Subject: [PATCH] Fix: Serial Number for one os systems had non alpha numeric
 tail.

---
 mtx-1.3.12/mtxl.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/mtx-1.3.12/mtxl.c b/mtx-1.3.12/mtxl.c
index 3f0fe75..8a9e34b 100644
--- a/mtx-1.3.12/mtxl.c
+++ b/mtx-1.3.12/mtxl.c
@@ -26,6 +26,7 @@
  *	overflow :-(. That could be important if mtxl is SUID for some reason.
 */
 
+#include <ctype.h>
 #include "mtx.h"
 #include "mtxl.h"
 
@@ -630,13 +631,10 @@ void copy_char_buffer(unsigned char *src, unsigned char *dest, int num)
 
   for (i=0; i < num; i++)
  {
-   *dest = *src++;
-   
-   if ((*dest < 32) || (*dest > 127))
-     {
-       *dest = 0;
-       break;
-     }
+   if (isalnum(*src)) {
+       *dest = *src;
+   }
+   src++;
    dest++;
  }
  *dest = 0;