1#![allow(dead_code)] // not used on all platforms
2
3use crate::fs;
4use crate::io::{self, Error, ErrorKind};
5use crate::path::Path;
6use crate::sys_common::ignore_notfound;
7
8pub(crate) const NOT_FILE_ERROR: Error = io::const_error!(
9 ErrorKind::InvalidInput,
10 "the source path is neither a regular file nor a symlink to a regular file",
11);
12
13pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
14 let mut reader: File = fs::File::open(path:from)?;
15 let metadata: Metadata = reader.metadata()?;
16
17 if !metadata.is_file() {
18 return Err(NOT_FILE_ERROR);
19 }
20
21 let mut writer: File = fs::File::create(path:to)?;
22 let perm: Permissions = metadata.permissions();
23
24 let ret: u64 = io::copy(&mut reader, &mut writer)?;
25 writer.set_permissions(perm)?;
26 Ok(ret)
27}
28
29pub fn remove_dir_all(path: &Path) -> io::Result<()> {
30 let filetype: FileType = fs::symlink_metadata(path)?.file_type();
31 if filetype.is_symlink() { fs::remove_file(path) } else { remove_dir_all_recursive(path) }
32}
33
34fn remove_dir_all_recursive(path: &Path) -> io::Result<()> {
35 for child: Result in fs::read_dir(path)? {
36 let result: io::Result<()> = try {
37 let child: DirEntry = child?;
38 if child.file_type()?.is_dir() {
39 remove_dir_all_recursive(&child.path())?;
40 } else {
41 fs::remove_file(&child.path())?;
42 }
43 };
44 // ignore internal NotFound errors to prevent race conditions
45 if let Err(err: &Error) = &result
46 && err.kind() != io::ErrorKind::NotFound
47 {
48 return result;
49 }
50 }
51 ignore_notfound(result:fs::remove_dir(path))
52}
53
54pub fn exists(path: &Path) -> io::Result<bool> {
55 match fs::metadata(path) {
56 Ok(_) => Ok(true),
57 Err(error: Error) if error.kind() == io::ErrorKind::NotFound => Ok(false),
58 Err(error: Error) => Err(error),
59 }
60}
61

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