Function rustix::io::dup2

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pub fn dup2<Fd: AsFd>(fd: Fd, new: &mut OwnedFd) -> Result<()>

Expand description

dup2(fd, new)—Changes the file description of a file descriptor.

dup2 conceptually closes new and then sets the file description for new to be the same as the one for fd. This is a very unusual operation, and should only be used on file descriptors where you know how new will be subsequently used.

This function does not set the O_CLOEXEC flag. To do a dup2 that does set O_CLOEXEC, use dup3 with DupFlags::CLOEXEC on platforms which support it, or fcntl_dupfd_cloexec

Function rustix::io::dup2

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