Windows watchParent() fix

[chicknsoup]

Slave process watches its parent by sending Signal(0), but as stated in os/exec.go sending Interrupt on Windows is not implemented. This cause prog exits with status code 1 error.

// Signal sends a signal to the Process.
// Sending Interrupt on Windows is not implemented.
func (p *Process) Signal(sig Signal) error {
	return p.signal(sig)
}

This fix uses gopsutil to check for process existence on Windows.

[jpillora]

Thanks for the PR!

Looks like this supports linux and windows, but misses the other operating systems. See sys_*.go files for how to do with build comments

[jpillora]

Can probably be proc_slave_windows.go // +build windows and proc_slave_others.go // +build !windows (untested)

[chicknsoup]

Can probably be proc_slave_windows.go // +build windows and proc_slave_others.go // +build !windows (untested)

Thanks. I forgot other oses as I only build linux and windows binaries.

[jpillora]

Merged! Thanks :)

[jpillora]

Hey @chicknsoup I just added auto testing and the windows build is failing. See https://github.com/jpillora/overseer/actions/runs/65595163

I don't have a windows machine, can you please check this?

[jpillora]

I pushed a fix but needs testing