Module tokio::fs

Asynchronous file and standard stream adaptation.

This module contains utility methods and adapter types for input/output to files or standard streams (Stdin, Stdout, Stderr), and filesystem manipulation, for use within (and only within) a Tokio runtime.

Tasks run by worker threads should not block, as this could delay servicing reactor events. Portable filesystem operations are blocking, however. This module offers adapters which use a blocking annotation to inform the runtime that a blocking operation is required. When necessary, this allows the runtime to convert the current thread from a worker to a backup thread, where blocking is acceptable.

Usage

Where possible, users should prefer the provided asynchronous-specific traits such as AsyncRead, or methods returning a Future or Poll type. Adaptions also extend to traits like std::io::Read where methods return std::io::Result. Be warned that these adapted methods may return std::io::ErrorKind::WouldBlock if a worker thread can not be converted to a backup thread immediately.

Modules

os	OS-specific functionality.

Structs

DirBuilder	A builder for creating directories in various manners.
DirEntry	Entries returned by the ReadDir stream.
File	A reference to an open file on the filesystem.
OpenOptions	Options and flags which can be used to configure how a file is opened.
ReadDir	Stream of the entries in a directory.

Functions

canonicalize	Returns the canonical, absolute form of a path with all intermediate components normalized and symbolic links resolved.
copy	Copies the contents of one file to another. This function will also copy the permission bits of the original file to the destination file. This function will overwrite the contents of to.
create_dir	Creates a new, empty directory at the provided path
create_dir_all	Recursively creates a directory and all of its parent components if they are missing.
hard_link	Creates a new hard link on the filesystem.
metadata	Given a path, queries the file system to get information about a file, directory, etc.
read	Reads the entire contents of a file into a bytes vector.
read_dir	Returns a stream over the entries within a directory.
read_link	Reads a symbolic link, returning the file that the link points to.
read_to_string	Creates a future which will open a file for reading and read the entire contents into a string and return said string.
remove_dir	Removes an existing, empty directory.
remove_dir_all	Removes a directory at this path, after removing all its contents. Use carefully!
remove_file	Removes a file from the filesystem.
rename	Renames a file or directory to a new name, replacing the original file if to already exists.
set_permissions	Changes the permissions found on a file or a directory.
symlink_metadata	Queries the file system metadata for a path.
write	Creates a future that will open a file for writing and write the entire contents of contents to it.