GeoffWilliams · September 21, 2019 03:06 · Sep 21, 2019
diff --git a/pydiskcomp.py b/pydiskcomp.py
@@ -0,0 +1,38 @@
+import os
+
+afile = "sdcard.img"
+bfile = "sdcard.img.manualworks"
+
+afilediff = "sdcard.img.diff"
+bfilediff = "sdcard.img.manualworks.diff"
+
+afile_size = os.path.getsize(afile)
+bfile_size = os.path.getsize(bfile)
+
+if afile_size != bfile_size:
+    raise "different sizes!"
+
+incident = 0
+with open(afile, 'rb') as af:
+    with open(bfile, 'rb') as bf:
+        pos = 0
+        while(pos < afile_size):
+            pos = af.tell()
+            a_sect = af.read(512)
+            b_sect = bf.read(512)
+
+
+            if (a_sect != b_sect):
+                print(f"different data at byte {pos} (sector {pos/512})")
+                print("a_file")
+                print(str(a_sect))
+                print("b_file")
+                print(str(b_sect))
+                print()
+
+                with open(f"afilediff-{incident}", 'wb') as afd:
+                    afd.write(a_sect)
+                with open(f"bfilediff-{incident}", 'wb') as bfd:
+                    bfd.write(b_sect)
+
+                incident += 1