Struct DevFs 

pub struct DevFs;

The synthetic /dev.

Implementations

impl DevFs

pub const DEVICE_MODE: u32 = 0o666

Mode reported for a device node, matching crw-rw-rw- on Linux: everyone reads, everyone writes, nobody executes. write accepts and discards for every device, so the write bit is the truth.

pub const DIRECTORY_MODE: u32 = 0o555

Mode reported for the /dev directory itself: searchable and readable, not writable.

Linux ships /dev as 0755, but that write bit is for root, and kaish has no root: mkdir and remove below refuse every caller unconditionally. 0755 would make test -w /dev answer YES about a directory that accepts nothing, which is the exact failure this mode exists to prevent. 0555 is the mode that tells the truth here.

pub fn new() -> DevFs

Create a new synthetic device filesystem.

Trait Implementations

impl Clone for DevFs

fn clone(&self) -> DevFs

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for DevFs

impl Debug for DevFs

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for DevFs

fn default() -> DevFs

Returns the “default value” for a type.

impl Filesystem for DevFs

fn read<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<Vec<u8>, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, DevFs: 'async_trait,

Read the entire contents of a file.

fn read_range<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, range: Option<ReadRange>, ) -> Pin<Box<dyn Future<Output = Result<Vec<u8>, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, DevFs: 'async_trait,

Read a (possibly partial) slice of a file.

fn write<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, path: &'life1 Path, _data: &'life2 [u8], ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, DevFs: 'async_trait,

Write data to a file, creating it if it doesn’t exist.

fn append<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, path: &'life1 Path, data: &'life2 [u8], ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, DevFs: 'async_trait,

Append data to a file, creating it if it doesn’t exist.

fn list<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<Vec<DirEntry>, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, DevFs: 'async_trait,

List entries in a directory.

fn stat<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<DirEntry, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, DevFs: 'async_trait,

Get metadata for a file or directory, following symlinks.

fn mkdir<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, DevFs: 'async_trait,

Create a directory (and parent directories if needed).

fn remove<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, DevFs: 'async_trait,

Remove a file, empty directory, or symlink.

fn read_only(&self) -> bool

Returns true if this filesystem is read-only.

fn set_mtime<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, mtime: SystemTime, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Set the modification time of an existing path.

fn path_access<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<PathAccess, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

What the kernel can do with one path on this filesystem.

fn resident_bytes(&self) -> Option<u64>

Memory-resident content bytes this filesystem is holding, if it tracks them.

fn exists<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = bool> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Check if a path exists, following symlinks.

fn rename<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, from: &'life1 Path, to: &'life2 Path, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, Self: 'async_trait,

Rename (move) a file, directory, or symlink.

fn real_path(&self, path: &Path) -> Option<PathBuf>

Get the real filesystem path for a VFS path.

fn read_link<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<PathBuf, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Read the target of a symbolic link without following it.

fn symlink<'life0, 'life1, 'life2, 'async_trait>( &'life0 self, target: &'life1 Path, link: &'life2 Path, ) -> Pin<Box<dyn Future<Output = Result<(), Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait, Self: 'async_trait,

Create a symbolic link.

fn lstat<'life0, 'life1, 'async_trait>( &'life0 self, path: &'life1 Path, ) -> Pin<Box<dyn Future<Output = Result<DirEntry, Error>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Self: 'async_trait,

Get metadata for a path without following its final symlink.