Module supervisor 

Co-process supervisor.

When EdgeGuard is run with --wrap "<command>", it launches the user’s app as a child process and acts as a tiny init for the container: it restarts the child on crash, and on shutdown forwards a termination signal to the child before exiting. The child is told to listen on APP_PORT via the PORT env var (the convention most web frameworks follow), while EdgeGuard itself binds the public $PORT.

The signal/process-group plumbing is Unix-specific; on Windows we fall back to a plain child kill (no process groups, no POSIX signals).

Functions

run

Run the supervised child until shutdown flips to true.