1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71

//! Unix-specific filesystem extensions.


use crate::io;
use crate::path::Path;
use crate::task::spawn_blocking;

/// Creates a new symbolic link on the filesystem.

///

/// The `dst` path will be a symbolic link pointing to the `src` path.

///

/// This function is an async version of [`std::os::unix::fs::symlink`].

///

/// [`std::os::unix::fs::symlink`]: https://doc.rust-lang.org/std/os/unix/fs/fn.symlink.html

///

/// # Examples

///

/// ```no_run

/// # fn main() -> std::io::Result<()> { async_std::task::block_on(async {

/// #

/// use async_std::os::unix::fs::symlink;

///

/// symlink("a.txt", "b.txt").await?;

/// #

/// # Ok(()) }) }

/// ```

pub async fn symlink<P: AsRef<Path>, Q: AsRef<Path>>(src: P, dst: Q) -> io::Result<()> {
    let src = src.as_ref().to_owned();
    let dst = dst.as_ref().to_owned();
    spawn_blocking(move || std::os::unix::fs::symlink(&src, &dst)).await
}

cfg_not_docs! {
    pub use std::os::unix::fs::{DirBuilderExt, DirEntryExt, OpenOptionsExt};
}

cfg_docs! {
    /// Unix-specific extensions to `DirBuilder`.

    pub trait DirBuilderExt {
        /// Sets the mode to create new directories with. This option defaults to

        /// `0o777`.

        fn mode(&mut self, mode: u32) -> &mut Self;
    }

    /// Unix-specific extension methods for `DirEntry`.

    pub trait DirEntryExt {
        /// Returns the underlying `d_ino` field in the contained `dirent`

        /// structure.

        fn ino(&self) -> u64;
    }

    /// Unix-specific extensions to `OpenOptions`.

    pub trait OpenOptionsExt {
        /// Sets the mode bits that a new file will be created with.

        ///

        /// If a new file is created as part of a `File::open_opts` call then this

        /// specified `mode` will be used as the permission bits for the new file.

        /// If no `mode` is set, the default of `0o666` will be used.

        /// The operating system masks out bits with the systems `umask`, to produce

        /// the final permissions.

        fn mode(&mut self, mode: u32) -> &mut Self;

        /// Pass custom flags to the `flags` argument of `open`.

        ///

        /// The bits that define the access mode are masked out with `O_ACCMODE`, to

        /// ensure they do not interfere with the access mode set by Rusts options.

        ///

        /// Custom flags can only set flags, not remove flags set by Rusts options.

        /// This options overwrites any previously set custom flags.

        fn custom_flags(&mut self, flags: i32) -> &mut Self;
    }
}