Support sending control signals to DSC

[BerheAbrha]

Summary of the new feature / enhancement

• When other agents are invoking DSC and if issued operation need to stop. It will need a way to send control signal to the child process.

Proposed technical implementation details (optional)

Send event to parent process so it can close the process handle.

WINDOWS

API DOC for sending events: - https://learn.microsoft.com/en-us/windows/win32/api/synchapi/nf-synchapi-createeventa

LINUX

https://www.tutorialspoint.com/unix_system_calls/sigaction.htm

[Bpoe]

Would responding to SIGINT as a request to stop meet the needs?
(https://stackoverflow.com/questions/813086/can-i-send-a-ctrl-c-sigint-to-an-application-on-windows)

[michaeltlombardi]

The Rust CLI book has a chapter on signal handling, which points to the signal_hook crate as an option.

It looks like the crate currently supports signals fully for not-Windows, and supports a limited subset of signals on windows, notably including SIGABRT, SIGBREAK, SIGINT, and SIGTERM.

[jodi-boone]

Please re-open as we need to ensure child processes are killed as well as parent.