Function rustix::io::ioctl_fioclex

pub fn ioctl_fioclex<Fd: AsFd>(fd: Fd) -> Result<()>

ioctl(fd, FIOCLEX, NULL)—Set the close-on-exec flag.

This is similar to fcntl(fd, F_SETFD, FD_CLOEXEC), except that it avoids clearing any other flags that might be set.