Create hexdump.py

a hex dumper in python

hexdump.py

@@ -0,0 +1,39 @@
+#!/opt/homebrew/bin/python3.10
+
+# Copyright 2023 by moshix
+# 
+#
+# hexdump.py a hex disassembler in ython
+#         
+#         
+#         Usage: hexdump.py objectfile 
+#                          dumps hex in groups of 16 bytes    
+#         
+#         
+#         
+#
+#
+# v0.1     Humble beginnings
+# v0.2     open file and read into byte array data
+# v0.3     extract program name from MVS object file at position 8..16
+# v0.4     loop thru object starting from position 359 and print out hex program
+# v0.5 
+import sys
+
+def hexdump(filename):
+    with open(filename, 'rb') as f:
+        counter = 0
+        while True:
+            chunk = f.read(16)
+            if not chunk:
+                break
+            hexdata = ' '.join(f'{byte:02X}' for byte in chunk)
+            textdata = ''.join(chr(byte) if 32 <= byte <= 126 else '.' for byte in chunk)
+            print(f'{counter:08X}  {hexdata:<48}  {textdata}')
+            counter += 16 
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        print(f'Usage: {sys.argv[0]} <filename>')
+        sys.exit(1)
+    hexdump(sys.argv[1])