This package retrieves a Wine shared memory map file descriptor and makes it available in Linux.

Because of the dependency on C / compiled binary files the best way is to copy this repo and include it in your own project.

// Get wine file descriptor
shmfd, err := GetWineShm("Local\\IRSDKMemMapFileName", FILE_MAP_READ)
if err != nil {
  log.Fatal(err)
}

// Turn file descriptor into os.File
file := os.NewFile(shmfd, "Local\\IRSDKMemMapFileName")

Go launches a windows binary through wine and passes a unix socket to the new wine process (shmwrapper1) by attaching the socket to the subprocess' stdout.

The wine process then opens the shared memory map and sets the file handle as it's stdin. Wine then launches a new linux process (shmwrapper2) which inherits the stdin & stdout from the parent process (shmwrapper1).

So now shmwrapper2 is a native Linux process with a unix socket as stdout and the windows shared memory map handle as it's stdin. It then uses a unix feature to send a file descriptor (stdin) over a unix socket (stdout) to the original go process initiating the wine process.

Very special thanks to jspenguin for creating the c code and thinking of a way to share file descriptors between Linux and Wine.