Function dup2_stdin
fn dup2_stdin<Fd: std::os::fd::AsFd>(fd: Fd) -> Result<()>Duplicate fd with Stdin, i.e., Stdin redirection.
dup2_stdinfn dup2_stdin<Fd: std::os::fd::AsFd>(fd: Fd) -> Result<()>Duplicate fd with Stdin, i.e., Stdin redirection.