Android System Library Replacer (via ADB + su)

This Python script is designed to help replace system .so library files on Android devices where adb root is not available (i.e., production builds). It uses adb and su to remount /system as read-write, back up existing libraries, and replace them with new versions.

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✅ Features

• Scans for replacement .so files in a local Replace/ folder.
• If Replace/ is empty, allows manual selection of files.
• Checks whether a matching library exists on the device in:
  • /system/lib/
  • /system/vendor/lib/
• Makes a timestamped backup of the original library in Backup/.
• Pushes the new library via /sdcard/, then uses su to:
  • Copy it to the system path
  • Set permissions to 644
  • Delete the temporary file
• Supports devices with root access via Magisk/SuperSU, even without adb root.

📁 Folder Structure project/ ├── Replace/ # Place your replacement .so files here ├── Backup/ # Automatically created for backups └── replace_libs.py # The main script

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🧩 Requirements

• Python 3
• ADB installed and in your PATH
• Android device with:
  • USB debugging enabled
  • Root access via Magisk/SuperSU
  • Read/write remount capability for /system
• adb shell with working su (test with adb shell → su → whoami → root)

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🚀 Usage

1. Connect your Android device via USB.
2. Enable USB Debugging.
3. Place .so files to replace into the Replace/ folder.
4. Run the script:

python3 replace_libs.py

    Follow the prompts to confirm replacements.

⚠️ Disclaimer

    This tool modifies system files — use at your own risk.
    Always ensure you have proper backups and understand the implications of modifying /system.