Function std::old_io::fs::copyUnstable

pub fn copy(from: &Path, to: &Path) -> IoResult<()>

Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file.

Note that if from and to both point to the same file, then the file will likely get truncated by this operation.

Example

fn main() { #![allow(unused_must_use)] use std::old_io::fs; fs::copy(&Path::new("foo.txt"), &Path::new("bar.txt")); }

use std::old_io::fs;

fs::copy(&Path::new("foo.txt"), &Path::new("bar.txt"));

Error

This function will return an error in the following situations, but is not limited to just these cases:

• The from path is not a file
• The from file does not exist
• The current process does not have the permission rights to access from or write to

Note that this copy is not atomic in that once the destination is ensured to not exist, there is nothing preventing the destination from being created and then destroyed by this operation.