Added "if name == main"

README.md

@@ -12,6 +12,14 @@ Other than that, I've created this repository to document how patching out verit
 
 An explanation of how the script works can be found [here](https://github.com/WessellUrdata/vbmeta-disable-verification/wiki/Explanation:-How-patching-vbmeta-works).
 
+## Usage
+
+Download the script from [Releases](https://github.com/WessellUrdata/vbmeta-disable-verification/releases).
+
+```bash
+$ python ./bvqc3.py <filename>
+```
+
 ## Credits
 
 Credits to [@libxzr](https://github.com/libxzr) for creating the [original repo](https://github.com/libxzr/vbmeta-disable-verification) and [the blog post about patching vbmeta.img](https://blog.xzr.moe/archives/226/).

patch-vbmeta.py

@@ -10,35 +10,35 @@ FLAGS_OFFSET = 123
 FLAGS_TO_SET = b'\x03'
 
 
-### main program
+if __name__ == "__main__":
 
-# if an argument is not provided
-if len(sys.argv) != 2:
-    sys.exit("Usage: python ./" + os.path.basename(__file__) + " <vbmeta-image>")
+    # if an argument is not provided
+    if len(sys.argv) != 2:
+        sys.exit("Usage: python ./" + os.path.basename(__file__) + " <vbmeta-image>")
 
-# try reading the file with read/write to make sure it exists
-FILE = sys.argv[1]
+    # try reading the file with read/write to make sure it exists
+    FILE = sys.argv[1]
 
-try:
-    fd = os.open(FILE, os.O_RDWR)
-except OSError:
-    sys.exit("Error reading file: " + FILE + ". File not modified. Exiting...")
+    try:
+        fd = os.open(FILE, os.O_RDWR)
+    except OSError:
+        sys.exit("Error reading file: " + FILE + ". File not modified. Exiting...")
 
-# making sure it's a vbmeta image by reading the magic bytes at the start of the file
-magic = os.read(fd, AVB_MAGIC_LEN)
+    # making sure it's a vbmeta image by reading the magic bytes at the start of the file
+    magic = os.read(fd, AVB_MAGIC_LEN)
 
-if (magic != AVB_MAGIC):
-    fd.close()
-    sys.exit("Error: The provided image is not a valid vbmeta image. File not modified. Exiting...")
+    if (magic != AVB_MAGIC):
+        fd.close()
+        sys.exit("Error: The provided image is not a valid vbmeta image. File not modified. Exiting...")
 
-# set the disable-verity and disable-verification flags at offset 123
-try:
-    os.lseek(fd, FLAGS_OFFSET, os.SEEK_SET)
-    os.write(fd, FLAGS_TO_SET)
-except OSError:
-    fd.close()
-    sys.exit("Error: Failed when patching the vbmeta image. Exiting...")
+    # set the disable-verity and disable-verification flags at offset 123
+    try:
+        os.lseek(fd, FLAGS_OFFSET, os.SEEK_SET)
+        os.write(fd, FLAGS_TO_SET)
+    except OSError:
+        fd.close()
+        sys.exit("Error: Failed when patching the vbmeta image. Exiting...")
 
-# end of program
-os.close(fd)
-print("Patching successful.")
+    # end of program
+    os.close(fd)
+    print("Patching successful.")