Issue with minitouch not terminating properly on SIGINT (Ctrl+C) on Win-PS

[songyuc]

Hi, guys,
I've encountered an issue where minitouch does not terminate properly when I send a SIGINT signal (using Ctrl+C) in the Win-PS terminal. After terminating minitouch with Ctrl+C, attempting to run it again results in a "binding socket: Address already in use" error. This suggests that the previous instance of minitouch did not release the port it was using.

Steps to Reproduce:

1. Start minitouch on an Android emulator/device using the command: adb shell /data/local/tmp/minitouch.
2. Terminate minitouch using Ctrl+C.
3. Attempt to run minitouch again using the same command.

Expected Behavior:
Minitouch should terminate gracefully upon receiving a SIGINT signal and release any resources it was using, including the port.

Actual Behavior:
Minitouch does not seem to release the port it was bound to, leading to a "binding socket: Address already in use" error upon attempting to run it again.

Environment:

• Operating System: Windows 10
• Android device/emulator model: emulator-5554
• Android version: Android 7.1.2

Additional Information:

• Running adb -s emulator-5554 shell ps | findstr minitouch confirms that the minitouch process is still running after attempting to terminate it with Ctrl+C.
• Temporary workaround: Manually killing the process using adb shell kill [PID] allows minitouch to be run again.

I believe this might be a bug with how minitouch handles the SIGINT signal. Any assistance or insights into this issue would be greatly appreciated.