Struct OverlayFileSystem 

pub struct OverlayFileSystem { /* private fields */ }

Implementations

impl OverlayFileSystem

pub fn new( lowers: Vec<MemoryFileSystem>, mode: OverlayMode, ) -> OverlayFileSystem

pub fn with_upper( lowers: Vec<MemoryFileSystem>, upper: MemoryFileSystem, ) -> OverlayFileSystem

pub fn lock_writes(&mut self)

pub fn check_rename_copy_up_limits( &mut self, old_path: &str, new_path: &str, max_bytes: Option<u64>, max_inodes: Option<usize>, ) -> Result<(), VfsError>

Trait Implementations

impl Debug for OverlayFileSystem

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

Formats the value using the given formatter.

impl VirtualFileSystem for OverlayFileSystem

fn read_file(&mut self, path: &str) -> Result<Vec<u8>, VfsError>

fn read_dir(&mut self, path: &str) -> Result<Vec<String>, VfsError>

fn read_dir_limited( &mut self, path: &str, max_entries: usize, ) -> Result<Vec<String>, VfsError>

fn read_dir_with_types( &mut self, path: &str, ) -> Result<Vec<VirtualDirEntry>, VfsError>

fn write_file( &mut self, path: &str, content: impl Into<Vec<u8>>, ) -> Result<(), VfsError>

Writes caller-owned bytes into the filesystem.

fn create_file_exclusive( &mut self, path: &str, content: impl Into<Vec<u8>>, ) -> Result<(), VfsError>

fn append_file( &mut self, path: &str, content: impl Into<Vec<u8>>, ) -> Result<u64, VfsError>

Appends caller-owned bytes into the filesystem after checking that the in-memory file can grow without overflowing addressable memory.

fn create_dir(&mut self, path: &str) -> Result<(), VfsError>

fn mkdir(&mut self, path: &str, recursive: bool) -> Result<(), VfsError>

fn exists(&self, path: &str) -> bool

fn stat(&mut self, path: &str) -> Result<VirtualStat, VfsError>

fn remove_file(&mut self, path: &str) -> Result<(), VfsError>

fn remove_dir(&mut self, path: &str) -> Result<(), VfsError>

fn rename(&mut self, old_path: &str, new_path: &str) -> Result<(), VfsError>

fn realpath(&self, path: &str) -> Result<String, VfsError>

fn symlink(&mut self, target: &str, link_path: &str) -> Result<(), VfsError>

fn read_link(&self, path: &str) -> Result<String, VfsError>

fn lstat(&self, path: &str) -> Result<VirtualStat, VfsError>

fn link(&mut self, old_path: &str, new_path: &str) -> Result<(), VfsError>

fn chmod(&mut self, path: &str, mode: u32) -> Result<(), VfsError>

fn chown(&mut self, path: &str, uid: u32, gid: u32) -> Result<(), VfsError>

fn utimes( &mut self, path: &str, atime_ms: u64, mtime_ms: u64, ) -> Result<(), VfsError>

fn utimes_spec( &mut self, path: &str, atime: VirtualUtimeSpec, mtime: VirtualUtimeSpec, follow_symlinks: bool, ) -> Result<(), VfsError>

fn truncate(&mut self, path: &str, length: u64) -> Result<(), VfsError>

Resizes a file. VM resource policy must be enforced by the caller.

fn pread( &mut self, path: &str, offset: u64, length: usize, ) -> Result<Vec<u8>, VfsError>

fn read_text_file(&mut self, path: &str) -> Result<String, VfsError>

fn write_file_with_mode( &mut self, path: &str, content: impl Into<Vec<u8>>, mode: Option<u32>, ) -> Result<(), VfsError>

fn create_file_exclusive_with_mode( &mut self, path: &str, content: impl Into<Vec<u8>>, mode: Option<u32>, ) -> Result<(), VfsError>

fn create_dir_with_mode( &mut self, path: &str, mode: Option<u32>, ) -> Result<(), VfsError>

fn mkdir_with_mode( &mut self, path: &str, recursive: bool, mode: Option<u32>, ) -> Result<(), VfsError>

fn pwrite( &mut self, path: &str, content: impl Into<Vec<u8>>, offset: u64, ) -> Result<(), VfsError>

Writes caller-owned bytes at an offset after checking that the in-memory file can grow without overflowing addressable memory.