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use crate::fs::File; use crate::io; use std::path::Path; /// Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file. /// This function will overwrite the contents of to. /// /// This is the async equivalent of `std::fs::copy`. /// /// # Examples /// /// ```no_run /// use tokio::fs; /// /// # async fn dox() -> std::io::Result<()> { /// fs::copy("foo.txt", "bar.txt").await?; /// # Ok(()) /// # } /// ``` pub async fn copy<P: AsRef<Path>, Q: AsRef<Path>>(from: P, to: Q) -> Result<u64, std::io::Error> { let from = File::open(from).await?; let to = File::create(to).await?; let (mut from, mut to) = (io::BufReader::new(from), io::BufWriter::new(to)); io::copy(&mut from, &mut to).await }