Module util 

Utility functions and types used throughout the composefs crate.

This module provides common functionality including error handling helpers, I/O utilities for reading data streams, SHA256 digest parsing, and filesystem operations like atomic symlink replacement.

Traits

ErrnoFilter 🔒

Functions

generate_tmpname 🔒

parse_sha256

Parse a string containing a SHA256 digest in hexidecimal form into a Sha256Digest.

proc_self_fd 🔒

Formats a string like “/proc/self/fd/3” for the given fd. This can be used to work with kernel APIs that don’t directly accept file descriptors.

read_exactish

This function reads the exact amount of bytes required to fill the buffer, possibly performing multiple reads to do so (and also retrying if required to deal with EINTR).

read_exactish_async

This function reads the exact amount of bytes required to fill the buffer, possibly performing multiple reads to do so (and also retrying if required to deal with EINTR).

replace_symlinkat 🔒

Type Aliases

Sha256Digest

A utility type representing a SHA-256 digest in binary.