tutti/services/tuttid/pid_file_process_windows.go

//go:build windows

package main

import "golang.org/x/sys/windows"

const maxWindowsProcessImagePath = 32768

func processExecutablePath(pid int) (string, error) {
	handle, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION, false, uint32(pid))
	if err != nil {
		return "", err
	}
	defer windows.CloseHandle(handle)

	buffer := make([]uint16, maxWindowsProcessImagePath)
	size := uint32(len(buffer))
	if err := windows.QueryFullProcessImageName(handle, 0, &buffer[0], &size); err != nil {
		return "", err
	}
	return windows.UTF16ToString(buffer[:size]), nil
}