Gio.SubprocessLauncher.prototype.take_fd

function take_fd(source_fd: Number(gint), target_fd: Number(gint)): void {
    // Gjs wrapper for g_subprocess_launcher_take_fd()
}
  

Transfer an arbitrary file descriptor from parent process to the child. This function takes "ownership" of the fd; it will be closed in the parent when self is freed.

By default, all file descriptors from the parent will be closed. This function allows you to create (for example) a custom pipe() or socketpair() before launching the process, and choose the target descriptor in the child.

An example use case is GNUPG, which has a command line argument --passphrase-fd providing a file descriptor number where it expects the passphrase to be written.