Gio.SubprocessLauncher.take_fd

### Method

# Gio SubprocessLaunchertake_fd

since: 2.40

#### Declaration

    void
    g_subprocess_launcher_take_fd (
      GSubprocessLauncher* self,
      gint source_fd,
      gint target_fd
    )

#### Description

Transfer an arbitrary file descriptor from parent process to the child. This function takes ownership of the `source_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.

Available since: 2.40

#### Parameters

`source_fd`

  Type: `gint`

  File descriptor in parent process.

`target_fd`

  Type: `gint`

  Target descriptor for child process.