proposal: os/exec: inherit process startup info for new commands on windows.

[Brett-Kavanaugh]

My proposal is for new processes spawned with the exec library to inherit the parents startup info. This is a windows specific proposal.

Currently, if I were to try and spawn a process in a specific desktop it would not work due to the startup info property not being inherited from the parent.

Thanks!

[mattn]

What do you mean inherited? bInheritHandles flag?

[Brett-Kavanaugh]

Yes, meaning if I start a Go process in C with special STARTUPINFO then when I call exec in the Go process it should get that special STARTUPINFO.

[ianlancetaylor]

The place for this kind of thing is syscall.SysProcAttr. Is the existing CreationFlags field sufficient for this? Could you just set a flag there?

[Brett-Kavanaugh]

@ianlancetaylor

How would I set this field?

[mattn]

For exmaple: https://github.com/mattn/goreman/blob/e9150e84f13c37dff0a79b8faed5b86522f3eb8e/proc_windows.go#L13

[rsc]

@Brett-Kavanaugh, given that you can control the flags in syscall.SysProcAttr, is that enough? If not, what specifically should we be looking at adding to syscall.SysProcAttr? Thanks.

[andybons]

Closing per lack of response. If you have more to add, please comment.

Per discussion with @golang/proposal-review