src/libstd/sys_common/fs.rs

   1 #![allow(dead_code)] // not used on all platforms
   2
   3 use crate::fs;
   4 use crate::io::{self, Error, ErrorKind};
   5 use crate::path::Path;
   6
   7 pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
   8     if !from.is_file() {
   9         return Err(Error::new(
  10             ErrorKind::InvalidInput,
  11             "the source path is not an existing regular file",
  12         ));
  13     }
  14
  15     let mut reader = fs::File::open(from)?;
  16     let mut writer = fs::File::create(to)?;
  17     let perm = reader.metadata()?.permissions();
  18
  19     let ret = io::copy(&mut reader, &mut writer)?;
  20     fs::set_permissions(to, perm)?;
  21     Ok(ret)
  22 }
  23
  24 pub fn remove_dir_all(path: &Path) -> io::Result<()> {
  25     let filetype = fs::symlink_metadata(path)?.file_type();
  26     if filetype.is_symlink() { fs::remove_file(path) } else { remove_dir_all_recursive(path) }
  27 }
  28
  29 fn remove_dir_all_recursive(path: &Path) -> io::Result<()> {
  30     for child in fs::read_dir(path)? {
  31         let child = child?;
  32         if child.file_type()?.is_dir() {
  33             remove_dir_all_recursive(&child.path())?;
  34         } else {
  35             fs::remove_file(&child.path())?;
  36         }
  37     }
  38     fs::remove_dir(path)
  39 }