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.
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.