Red Bear OS base baseline from 0.1.0 pre-patched archive
This commit is contained in:
Red Bear OS
@@ -0,0 +1,31 @@
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[package]
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name = "redox-initfs-tools"
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version = "0.2.0"
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authors = ["4lDO2 <4lDO2@protonmail.com>", "Kamil Koczurek <koczurekk@gmail.com>"]
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edition = "2021"
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description = "Tooling to archive a directory into an userspace bootstrap image (initfs)"
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license = "MIT"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[[bin]]
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name = "redox-initfs-ar"
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path = "src/bin/archive.rs"
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[[bin]]
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name = "redox-initfs-dump"
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path = "src/bin/dump.rs"
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[dependencies]
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anyhow.workspace = true
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clap = {workspace = true, features = ["cargo"]}
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env_logger = "0.8"
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log.workspace = true
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pathdiff = "0.2.1"
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plain.workspace = true
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twox-hash = "1.6"
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redox-initfs = {path = ".."}
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[lints]
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workspace = true
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+1
@@ -0,0 +1 @@
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file.txt
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@@ -0,0 +1 @@
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This is a file meant to be used in a redox-initfs test.
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@@ -0,0 +1,67 @@
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use std::path::Path;
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use anyhow::{Context, Result};
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use clap::{Arg, Command};
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use redox_initfs_tools::{self as archive, Args, DEFAULT_MAX_SIZE};
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fn main() -> Result<()> {
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let matches = Command::new("redox-initfs-ar")
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.about("create an initfs image from a directory")
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.version(clap::crate_version!())
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.author(clap::crate_authors!())
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.arg(
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Arg::new("MAX_SIZE")
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.long("max-size")
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.short('m')
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.required(false)
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.help("Set the upper limit for how large the image can become (default 64 MiB)."),
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)
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// TODO: support non-utf8 paths (applies to other paths as well)
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.arg(
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Arg::new("SOURCE")
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.required(true)
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.help("Specify the source directory to build the image from."),
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)
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.arg(
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Arg::new("BOOTSTRAP_CODE")
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.required(false)
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.help("Specify the bootstrap ELF file to include in the image."),
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)
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.arg(
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Arg::new("OUTPUT")
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.required(true)
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.long("output")
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.short('o')
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.help("Specify the path of the new image file."),
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)
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.get_matches();
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env_logger::init();
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let max_size = if let Some(max_size_str) = matches.get_one::<String>("MAX_SIZE") {
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max_size_str
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.parse::<u64>()
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.context("expected an integer for MAX_SIZE")?
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} else {
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DEFAULT_MAX_SIZE
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};
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let source = matches
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.get_one::<String>("SOURCE")
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.expect("expected the required arg SOURCE to exist");
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let bootstrap_code = matches.get_one::<String>("BOOTSTRAP_CODE");
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let destination = matches
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.get_one::<String>("OUTPUT")
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.expect("expected the required arg OUTPUT to exist");
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let args = Args {
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source: Path::new(source),
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bootstrap_code: bootstrap_code.map(Path::new),
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destination_path: Path::new(destination),
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max_size,
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};
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archive::archive(&args)
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}
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@@ -0,0 +1,112 @@
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use std::{ffi::OsStr, path::Path};
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use anyhow::{Context, Result};
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use clap::{Arg, Command};
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use redox_initfs::{InitFs, InodeKind};
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fn main() -> Result<()> {
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let matches = Command::new("redox-initfs-dump")
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.about("dump initfs metadata")
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.version(clap::crate_version!())
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.author(clap::crate_authors!())
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.arg(
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Arg::new("IMAGE")
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.required(true)
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.help("specify the image to dump"),
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)
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.get_matches();
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// TODO: support non-utf8 paths
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let source = matches
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.get_one::<String>("IMAGE")
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.expect("expected the required arg IMAGE to exist");
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let bytes = std::fs::read(source).context("failed to read image into memory")?;
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let initfs = InitFs::new(&bytes, None).context("failed to parse initfs header")?;
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println!("{:#?}", initfs.header());
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for inode in initfs.all_inodes() {
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print!("{:?}: ", inode);
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let inode_struct = match initfs.get_inode(inode) {
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Some(s) => s,
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None => {
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println!("failed to obtain.");
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continue;
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}
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};
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match inode_struct.kind() {
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InodeKind::Unknown => println!("(unknown)"),
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InodeKind::Dir(dir) => {
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print!("dir{{");
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let ec = match dir.entry_count().ok() {
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Some(c) => c,
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None => {
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println!("(failed to get entry count)}}");
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continue;
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}
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};
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println!("entries=[");
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for entry in 0..ec {
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let entry = match dir.get_entry(entry).ok().flatten() {
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Some(e) => e,
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None => {
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println!("\t(unknown),");
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continue;
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}
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};
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let name = match entry.name().ok() {
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Some(name) => name,
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None => {
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println!("\t(unknown name),");
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continue;
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}
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};
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println!(
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"\t`{}` => {:?},",
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String::from_utf8_lossy(name),
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entry.inode()
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);
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}
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println!("]}}");
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}
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InodeKind::File(file) => {
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print!("file{{");
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match file.data().ok() {
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Some(d) => {
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use std::hash::Hasher;
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let mut hasher = twox_hash::XxHash64::with_seed(0);
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hasher.write(d);
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print!("len={}, hash={:#0x}", d.len(), hasher.finish());
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}
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None => {
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print!("(failed to get data)");
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}
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}
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println!("}}");
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}
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InodeKind::Link(link) => {
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print!("link{{");
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match link.data().ok() {
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Some(d) => {
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use std::os::unix::ffi::OsStrExt;
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print!("dst={}", Path::new(OsStr::from_bytes(d)).display());
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}
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None => {
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print!("(failed to get data)");
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}
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}
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println!("}}");
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}
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}
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}
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Ok(())
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}
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@@ -0,0 +1,590 @@
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use std::convert::{TryFrom, TryInto};
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use std::fs::{DirEntry, File, Metadata, OpenOptions};
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use std::io::{prelude::*, SeekFrom};
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use std::path::{Path, PathBuf};
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use std::os::unix::ffi::OsStrExt;
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use std::os::unix::fs::{FileExt, FileTypeExt, PermissionsExt};
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use anyhow::{anyhow, bail, Context, Result};
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use redox_initfs::types as initfs;
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pub const KIBIBYTE: u64 = 1024;
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pub const MEBIBYTE: u64 = KIBIBYTE * 1024;
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#[cfg(debug_assertions)]
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pub const DEFAULT_MAX_SIZE: u64 = 256 * MEBIBYTE;
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#[cfg(not(debug_assertions))]
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pub const DEFAULT_MAX_SIZE: u64 = 64 * MEBIBYTE;
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// FIXME make this configurable to handle systems with 16k and 64k pages.
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const PAGE_SIZE: u16 = 4096;
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enum EntryKind {
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File(File),
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Dir(Dir),
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Link(PathBuf),
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}
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struct Entry {
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name: Vec<u8>,
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kind: EntryKind,
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metadata: Metadata,
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}
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struct Dir {
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entries: Vec<Entry>,
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}
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struct State<'path> {
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file: OutputImageGuard<'path>,
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offset: u64,
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max_size: u64,
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inode_count: u16,
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buffer: Box<[u8]>,
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inode_table_offset: u32,
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}
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fn write_all_at(file: &File, buf: &[u8], offset: u64, r#where: &str) -> Result<()> {
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file.write_all_at(buf, offset)?;
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log::trace!(
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"Wrote {}..{} within {}",
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offset,
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offset + buf.len() as u64,
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r#where
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);
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Ok(())
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}
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fn read_directory(state: &mut State, path: &Path, root_path: &Path) -> Result<Dir> {
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let read_dir = path
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.read_dir()
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.with_context(|| anyhow!("failed to read directory `{}`", path.to_string_lossy(),))?;
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let entries = read_dir
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.map(|result| {
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let entry = result.with_context(|| {
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anyhow!(
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"failed to get a directory entry from `{}`",
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path.to_string_lossy(),
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)
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})?;
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let metadata = entry.metadata().with_context(|| {
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anyhow!(
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"failed to get metadata for `{}`",
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entry.path().to_string_lossy(),
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)
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})?;
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let file_type = metadata.file_type();
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let unsupported_type = |ty: &str, entry: &DirEntry| {
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Err(anyhow!(
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"failed to include {} at `{}`: not supported by redox-initfs",
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ty,
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entry.path().to_string_lossy()
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))
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};
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let name = entry
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.path()
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.file_name()
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.context("expected path to have a valid filename")?
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.as_bytes()
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.to_owned();
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let entry_kind = if file_type.is_socket() {
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return unsupported_type("socket", &entry);
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} else if file_type.is_fifo() {
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return unsupported_type("FIFO", &entry);
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} else if file_type.is_block_device() {
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return unsupported_type("block device", &entry);
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} else if file_type.is_char_device() {
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return unsupported_type("character device", &entry);
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} else if file_type.is_file() {
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EntryKind::File(File::open(entry.path()).with_context(|| {
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anyhow!("failed to open file `{}`", entry.path().to_string_lossy(),)
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})?)
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} else if file_type.is_dir() {
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EntryKind::Dir(read_directory(state, &entry.path(), root_path)?)
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} else if file_type.is_symlink() {
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let link_file_path = entry.path();
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let link_path = std::fs::read_link(&link_file_path)?;
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let cannonical = if link_path.is_absolute() {
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link_path.clone()
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} else {
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let Some(link_parent) = link_file_path.parent() else {
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bail!("Link at `{}` has no parent", link_file_path.display())
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};
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link_parent.canonicalize()?.join(link_path.clone())
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};
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let dir_path = path
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.canonicalize()
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.context("Failed to cannonicalize path")?;
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let path = pathdiff::diff_paths(cannonical, &dir_path).ok_or_else(|| {
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anyhow!(
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"Failed to diff symlink path [{}] to path [{}]",
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link_path.display(),
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dir_path.display()
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)
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})?;
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EntryKind::Link(path)
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} else {
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return Err(anyhow!(
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"unknown file type at `{}`",
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entry.path().to_string_lossy()
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));
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};
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// TODO: Allow the user to specify a lower limit than u16::MAX.
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state.inode_count = state
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.inode_count
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.checked_add(1)
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.ok_or_else(|| anyhow!("exceeded the maximum inode limit"))?;
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Ok(Entry {
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kind: entry_kind,
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metadata,
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name,
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})
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})
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.collect::<Result<Vec<_>>>()?;
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Ok(Dir { entries })
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}
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fn bump_alloc(state: &mut State, size: u64, why: &str) -> Result<u64> {
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let end = (state.offset + size).next_multiple_of(PAGE_SIZE.into());
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if end <= state.max_size {
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let offset = state.offset;
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state.offset = end;
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log::debug!("Allocating range {}..{} in {}", offset, state.offset, why);
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Ok(offset)
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||||
} else {
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Err(anyhow!("bump allocation failed: max limit reached"))
|
||||
}
|
||||
}
|
||||
struct WriteResult {
|
||||
size: u32,
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offset: u32,
|
||||
}
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|
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fn allocate_and_write_file(state: &mut State, mut file: &File) -> Result<WriteResult> {
|
||||
let size = file
|
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.seek(SeekFrom::End(0))
|
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.context("failed to seek to end")?;
|
||||
|
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let size: u32 = size.try_into().context("file too large")?;
|
||||
|
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let offset: u32 = bump_alloc(state, size.into(), "allocate space for file")
|
||||
.context("failed to allocate space for file")?
|
||||
.try_into()
|
||||
.context("file offset too high")?;
|
||||
|
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let buffer_size: u32 = state.buffer.len().try_into().context("buffer too large")?;
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||||
|
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file.seek(SeekFrom::Start(0))
|
||||
.context("failed to seek to start")?;
|
||||
|
||||
let mut relative_offset = 0;
|
||||
|
||||
// TODO: If this would ever turn out to be a bottleneck, then perhaps we could use
|
||||
// copy_file_range in `nix`.
|
||||
|
||||
while relative_offset < size {
|
||||
let allowed_length = std::cmp::min(buffer_size, size - relative_offset);
|
||||
let allowed_length =
|
||||
usize::try_from(allowed_length).expect("expected buffer size not to be outside usize");
|
||||
|
||||
file.read(&mut state.buffer[..allowed_length])
|
||||
.context("failed to read from source file")?;
|
||||
|
||||
write_all_at(
|
||||
&state.file,
|
||||
&state.buffer[..allowed_length],
|
||||
u64::from(offset + relative_offset),
|
||||
"allocate_and_write_file buffer chunk",
|
||||
)
|
||||
.context("failed to write source file into destination image")?;
|
||||
|
||||
relative_offset += buffer_size;
|
||||
}
|
||||
|
||||
Ok(WriteResult { size, offset })
|
||||
}
|
||||
|
||||
fn allocate_and_write_link(state: &mut State, link: &Path) -> Result<WriteResult> {
|
||||
let data = link.as_os_str().as_bytes();
|
||||
let size: u32 = data.len().try_into().unwrap();
|
||||
|
||||
let offset: u32 = bump_alloc(state, size.into(), "allocate space for file")
|
||||
.context("failed to allocate space for file")?
|
||||
.try_into()
|
||||
.context("file offset too high")?;
|
||||
|
||||
write_all_at(
|
||||
&state.file,
|
||||
data,
|
||||
u64::from(offset),
|
||||
"allocate_and_write_link target path",
|
||||
)
|
||||
.context("failed to write source file into destination image")?;
|
||||
|
||||
Ok(WriteResult { size, offset })
|
||||
}
|
||||
|
||||
fn write_inode(
|
||||
state: &mut State,
|
||||
ty: initfs::InodeType,
|
||||
write_result: WriteResult,
|
||||
inode: u16,
|
||||
) -> Result<()> {
|
||||
let inode_size: u32 = std::mem::size_of::<initfs::InodeHeader>()
|
||||
.try_into()
|
||||
.expect("inode header length cannot fit within u32");
|
||||
|
||||
// TODO: Use main buffer and write in bulk.
|
||||
let mut inode_buf = [0_u8; std::mem::size_of::<initfs::InodeHeader>()];
|
||||
|
||||
let inode_hdr = plain::from_mut_bytes::<initfs::InodeHeader>(&mut inode_buf)
|
||||
.expect("expected inode struct to have alignment 1, and buffer size to match");
|
||||
|
||||
*inode_hdr = initfs::InodeHeader {
|
||||
type_: (ty as u32).into(),
|
||||
length: initfs::Length(write_result.size.into()),
|
||||
offset: initfs::Offset(write_result.offset.into()),
|
||||
};
|
||||
|
||||
log::debug!(
|
||||
"Writing inode index {} from offset {}",
|
||||
inode,
|
||||
state.inode_table_offset
|
||||
);
|
||||
write_all_at(
|
||||
&state.file,
|
||||
&inode_buf,
|
||||
u64::from(state.inode_table_offset + u32::from(inode) * inode_size),
|
||||
"write_inode",
|
||||
)
|
||||
.context("failed to write inode struct to disk image")
|
||||
}
|
||||
fn allocate_and_write_dir(
|
||||
state: &mut State,
|
||||
dir: &Dir,
|
||||
current_inode: &mut u16,
|
||||
) -> Result<WriteResult> {
|
||||
let entry_size =
|
||||
u16::try_from(std::mem::size_of::<initfs::DirEntry>()).context("entry size too large")?;
|
||||
let entry_count = u16::try_from(dir.entries.len()).context("too many subdirectories")?;
|
||||
|
||||
let entry_table_length = u32::from(entry_count)
|
||||
.checked_mul(u32::from(entry_size))
|
||||
.ok_or_else(|| anyhow!("entry table length too large when multiplying by size"))?;
|
||||
|
||||
let entry_table_offset: u32 =
|
||||
bump_alloc(state, entry_table_length.into(), "allocate entry table")
|
||||
.context("failed to allocate entry table")?
|
||||
.try_into()
|
||||
.context("directory entries offset too high")?;
|
||||
|
||||
for (index, entry) in dir.entries.iter().enumerate() {
|
||||
let (write_result, ty) = match entry.kind {
|
||||
EntryKind::Dir(ref subdir) => {
|
||||
let write_result = allocate_and_write_dir(state, subdir, current_inode)
|
||||
.with_context(|| {
|
||||
anyhow!(
|
||||
"failed to copy directory entries from `{}` into image",
|
||||
String::from_utf8_lossy(&entry.name)
|
||||
)
|
||||
})?;
|
||||
|
||||
(write_result, initfs::InodeType::Dir)
|
||||
}
|
||||
|
||||
EntryKind::File(ref file) => {
|
||||
let write_result = allocate_and_write_file(state, file)
|
||||
.context("failed to copy file into image")?;
|
||||
|
||||
let type_ = if entry.metadata.permissions().mode() & 0o100 != 0 {
|
||||
initfs::InodeType::ExecutableFile
|
||||
} else {
|
||||
initfs::InodeType::RegularFile
|
||||
};
|
||||
|
||||
(write_result, type_)
|
||||
}
|
||||
|
||||
EntryKind::Link(ref path) => {
|
||||
let write_result = allocate_and_write_link(state, path)
|
||||
.context("failed to copy symbolic link into image")?;
|
||||
(write_result, initfs::InodeType::Link)
|
||||
}
|
||||
};
|
||||
|
||||
let index: u16 = index
|
||||
.try_into()
|
||||
.expect("expected dir entry count not to exceed u32");
|
||||
|
||||
*current_inode += 1;
|
||||
write_inode(state, ty, write_result, *current_inode)?;
|
||||
|
||||
let (name_offset, name_len) = {
|
||||
let name_len: u16 = entry.name.len().try_into().context("file name too long")?;
|
||||
|
||||
let offset: u32 = bump_alloc(state, u64::from(name_len), "allocate file name")
|
||||
.context("failed to allocate space for file name")?
|
||||
.try_into()
|
||||
.context("file name offset too high up")?;
|
||||
|
||||
write_all_at(&state.file, &entry.name, offset.into(), "writing file name")
|
||||
.context("failed to write file name")?;
|
||||
|
||||
(offset, name_len)
|
||||
};
|
||||
{
|
||||
let mut direntry_buf = [0_u8; std::mem::size_of::<initfs::DirEntry>()];
|
||||
|
||||
let direntry = plain::from_mut_bytes::<initfs::DirEntry>(&mut direntry_buf)
|
||||
.expect("expected dir entry struct to have alignment 1, and buffer size to match");
|
||||
|
||||
log::debug!(
|
||||
"Linking inode {} into dir entry index {}, file name `{}`",
|
||||
current_inode,
|
||||
index,
|
||||
String::from_utf8_lossy(&entry.name)
|
||||
);
|
||||
|
||||
*direntry = initfs::DirEntry {
|
||||
inode: (*current_inode).into(),
|
||||
name_len: name_len.into(),
|
||||
name_offset: initfs::Offset(name_offset.into()),
|
||||
};
|
||||
|
||||
write_all_at(
|
||||
&state.file,
|
||||
&direntry_buf,
|
||||
u64::from(entry_table_offset + u32::from(index) * u32::from(entry_size)),
|
||||
"allocate_and_write_dir entry",
|
||||
)
|
||||
.context("failed to write dir entry struct to image")?;
|
||||
}
|
||||
}
|
||||
|
||||
Ok(WriteResult {
|
||||
size: entry_table_length,
|
||||
offset: entry_table_offset,
|
||||
})
|
||||
}
|
||||
fn allocate_contents_and_write_inodes(state: &mut State, dir: &Dir) -> Result<()> {
|
||||
let start_inode = 0;
|
||||
let mut current_inode = start_inode;
|
||||
|
||||
let write_result = allocate_and_write_dir(state, dir, &mut current_inode)
|
||||
.context("failed to allocate and write all directories and files")?;
|
||||
|
||||
write_inode(state, initfs::InodeType::Dir, write_result, start_inode)
|
||||
}
|
||||
|
||||
struct OutputImageGuard<'a> {
|
||||
file: File,
|
||||
path: &'a Path,
|
||||
ok: bool,
|
||||
}
|
||||
|
||||
impl std::ops::Deref for OutputImageGuard<'_> {
|
||||
type Target = File;
|
||||
|
||||
fn deref(&self) -> &Self::Target {
|
||||
&self.file
|
||||
}
|
||||
}
|
||||
impl std::ops::DerefMut for OutputImageGuard<'_> {
|
||||
fn deref_mut(&mut self) -> &mut Self::Target {
|
||||
&mut self.file
|
||||
}
|
||||
}
|
||||
|
||||
impl Drop for OutputImageGuard<'_> {
|
||||
fn drop(&mut self) {
|
||||
if !self.ok {
|
||||
let _ = std::fs::remove_file(self.path);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
pub struct Args<'a> {
|
||||
pub destination_path: &'a Path,
|
||||
pub max_size: u64,
|
||||
pub source: &'a Path,
|
||||
pub bootstrap_code: Option<&'a Path>,
|
||||
}
|
||||
pub fn archive(
|
||||
&Args {
|
||||
destination_path,
|
||||
max_size,
|
||||
source,
|
||||
bootstrap_code,
|
||||
}: &Args,
|
||||
) -> Result<()> {
|
||||
let previous_extension = destination_path.extension().map_or("", |ext| {
|
||||
ext.to_str()
|
||||
.expect("expected destination path to be valid UTF-8")
|
||||
});
|
||||
|
||||
if !destination_path
|
||||
.metadata()
|
||||
.map_or(true, |metadata| metadata.is_file())
|
||||
{
|
||||
return Err(anyhow!("Destination file must be a file"));
|
||||
}
|
||||
|
||||
let destination_temp_path =
|
||||
destination_path.with_extension(format!("{}.partial", previous_extension));
|
||||
|
||||
let destination_temp_file = OpenOptions::new()
|
||||
.read(false)
|
||||
.write(true)
|
||||
.create(true)
|
||||
.truncate(true)
|
||||
.create_new(false)
|
||||
.open(&destination_temp_path)
|
||||
.context("failed to open destination file")?;
|
||||
|
||||
let guard = OutputImageGuard {
|
||||
file: destination_temp_file,
|
||||
path: &destination_temp_path,
|
||||
ok: false,
|
||||
};
|
||||
|
||||
const BUFFER_SIZE: usize = 8192;
|
||||
|
||||
let mut state = State {
|
||||
file: guard,
|
||||
offset: 0,
|
||||
max_size,
|
||||
// Include root directory.
|
||||
inode_count: 1,
|
||||
buffer: vec![0_u8; BUFFER_SIZE].into_boxed_slice(),
|
||||
inode_table_offset: 0,
|
||||
};
|
||||
|
||||
let root_path = source;
|
||||
let root = read_directory(&mut state, root_path, root_path).context("failed to read root")?;
|
||||
|
||||
log::debug!("there are {} inodes", state.inode_count);
|
||||
|
||||
// NOTE: The header is always stored at offset zero.
|
||||
let header_offset = bump_alloc(&mut state, 4096, "allocate header")?;
|
||||
assert_eq!(header_offset, 0);
|
||||
|
||||
let bootstrap_entry = if let Some(bootstrap_code) = bootstrap_code {
|
||||
allocate_and_write_file(
|
||||
&mut state,
|
||||
&File::open(bootstrap_code).with_context(|| {
|
||||
anyhow!(
|
||||
"failed to open bootstrap code file `{}`",
|
||||
bootstrap_code.to_string_lossy(),
|
||||
)
|
||||
})?,
|
||||
)?;
|
||||
let bootstrap_data = std::fs::read(bootstrap_code).with_context(|| {
|
||||
anyhow!(
|
||||
"failed to read bootstrap code file `{}`",
|
||||
bootstrap_code.to_string_lossy(),
|
||||
)
|
||||
})?;
|
||||
elf_entry(&bootstrap_data)
|
||||
} else {
|
||||
u64::MAX
|
||||
};
|
||||
|
||||
let inode_table_length = {
|
||||
let inode_entry_size: u64 = std::mem::size_of::<initfs::InodeHeader>()
|
||||
.try_into()
|
||||
.expect("expected table entry size to fit");
|
||||
|
||||
inode_entry_size
|
||||
.checked_mul(u64::from(state.inode_count))
|
||||
.ok_or_else(|| anyhow!("inode table too large"))?
|
||||
};
|
||||
|
||||
let inode_table_offset = bump_alloc(&mut state, inode_table_length, "allocate inode table")?;
|
||||
|
||||
// Finally, write the header to the disk image.
|
||||
|
||||
let inode_table_offset = initfs::Offset(
|
||||
u32::try_from(inode_table_offset)
|
||||
.with_context(|| "inode table located too far away")?
|
||||
.into(),
|
||||
);
|
||||
|
||||
state.inode_table_offset = inode_table_offset.0.get();
|
||||
|
||||
allocate_contents_and_write_inodes(&mut state, &root)?;
|
||||
|
||||
let current_system_time = std::time::SystemTime::now();
|
||||
|
||||
let time_since_epoch = current_system_time
|
||||
.duration_since(std::time::SystemTime::UNIX_EPOCH)
|
||||
.context("could not calculate timestamp")?;
|
||||
|
||||
{
|
||||
let mut header_bytes = [0_u8; std::mem::size_of::<initfs::Header>()];
|
||||
let header = plain::from_mut_bytes(&mut header_bytes)
|
||||
.expect("expected header size to be sufficient and alignment to be 1");
|
||||
|
||||
*header = initfs::Header {
|
||||
magic: initfs::Magic(initfs::MAGIC),
|
||||
creation_time: initfs::Timespec {
|
||||
sec: time_since_epoch.as_secs().into(),
|
||||
nsec: time_since_epoch.subsec_nanos().into(),
|
||||
},
|
||||
inode_count: state.inode_count.into(),
|
||||
inode_table_offset,
|
||||
bootstrap_entry: bootstrap_entry.into(),
|
||||
initfs_size: state
|
||||
.file
|
||||
.metadata()
|
||||
.context("failed to get initfs size")?
|
||||
.len()
|
||||
.into(),
|
||||
page_size: PAGE_SIZE.into(),
|
||||
};
|
||||
write_all_at(&state.file, &header_bytes, header_offset, "writing header")
|
||||
.context("failed to write header")?;
|
||||
}
|
||||
|
||||
std::fs::rename(&destination_temp_path, destination_path)
|
||||
.context("failed to rename output image")?;
|
||||
|
||||
state.file.ok = true;
|
||||
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn elf_entry(data: &[u8]) -> u64 {
|
||||
assert!(&data[..4] == b"\x7FELF");
|
||||
match (data[4], data[5]) {
|
||||
// 32-bit, little endian
|
||||
(1, 1) => u32::from_le_bytes(
|
||||
<[u8; 4]>::try_from(&data[0x18..0x18 + 4]).expect("conversion cannot fail"),
|
||||
) as u64,
|
||||
// 32-bit, big endian
|
||||
(1, 2) => u32::from_be_bytes(
|
||||
<[u8; 4]>::try_from(&data[0x18..0x18 + 4]).expect("conversion cannot fail"),
|
||||
) as u64,
|
||||
// 64-bit, little endian
|
||||
(2, 1) => u64::from_le_bytes(
|
||||
<[u8; 8]>::try_from(&data[0x18..0x18 + 8]).expect("conversion cannot fail"),
|
||||
),
|
||||
// 64-bit, big endian
|
||||
(2, 2) => u64::from_be_bytes(
|
||||
<[u8; 8]>::try_from(&data[0x18..0x18 + 8]).expect("conversion cannot fail"),
|
||||
),
|
||||
(ei_class, ei_data) => {
|
||||
panic!("Unsupported ELF EI_CLASS {} EI_DATA {}", ei_class, ei_data);
|
||||
}
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,108 @@
|
||||
use std::{collections::HashMap, path::Path};
|
||||
|
||||
use anyhow::{anyhow, Context, Result};
|
||||
use redox_initfs::{InitFs, InodeKind, InodeStruct};
|
||||
|
||||
#[derive(Debug, Clone, PartialEq)]
|
||||
enum Node {
|
||||
Link { to: Vec<u8> },
|
||||
File { data: Vec<u8> },
|
||||
Dir(HashMap<Vec<u8>, Node>),
|
||||
Unknown,
|
||||
}
|
||||
|
||||
impl Node {
|
||||
fn link(to: impl Into<Vec<u8>>) -> Self {
|
||||
Node::Link { to: to.into() }
|
||||
}
|
||||
|
||||
fn file(data: impl Into<Vec<u8>>) -> Self {
|
||||
Node::File { data: data.into() }
|
||||
}
|
||||
|
||||
fn dir(entries: impl IntoIterator<Item = (impl Into<Vec<u8>>, Node)>) -> Self {
|
||||
Self::Dir(
|
||||
entries
|
||||
.into_iter()
|
||||
.map(|(name, node)| (name.into(), node))
|
||||
.collect(),
|
||||
)
|
||||
}
|
||||
}
|
||||
|
||||
fn build_tree<'a>(fs: InitFs<'a>, inode: InodeStruct<'a>) -> anyhow::Result<Node> {
|
||||
use InodeKind::*;
|
||||
let node = match inode.kind() {
|
||||
File(file) => {
|
||||
let data = file.data().context("failed to get file data")?.to_owned();
|
||||
Node::File { data }
|
||||
}
|
||||
Link(link) => {
|
||||
let data = link.data().context("failed to get link data")?.to_owned();
|
||||
Node::Link { to: data }
|
||||
}
|
||||
Dir(dir) => {
|
||||
let mut entries = HashMap::new();
|
||||
for idx in 0..dir
|
||||
.entry_count()
|
||||
.context("failed to get inode entry count")?
|
||||
{
|
||||
let entry = dir
|
||||
.get_entry(idx)
|
||||
.context("failed to get entry for index")?
|
||||
.ok_or_else(|| anyhow!("no entry found"))?;
|
||||
|
||||
let entry_name = entry.name().context("failed to get entry name")?;
|
||||
let inode = fs
|
||||
.get_inode(entry.inode())
|
||||
.context("failed to load file inode")?;
|
||||
|
||||
let entry_node = build_tree(fs, inode)?;
|
||||
|
||||
entries.insert(entry_name.to_owned(), entry_node);
|
||||
}
|
||||
|
||||
Node::Dir(entries)
|
||||
}
|
||||
Unknown => Node::Unknown,
|
||||
};
|
||||
|
||||
Ok(node)
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn archive_and_read() -> Result<()> {
|
||||
env_logger::init();
|
||||
|
||||
let args = redox_initfs_tools::Args {
|
||||
destination_path: &Path::new(env!("CARGO_TARGET_TMPDIR")).join("out.img"),
|
||||
source: Path::new("data"),
|
||||
bootstrap_code: None,
|
||||
max_size: redox_initfs_tools::DEFAULT_MAX_SIZE,
|
||||
};
|
||||
redox_initfs_tools::archive(&args).context("failed to archive")?;
|
||||
|
||||
let data = std::fs::read(args.destination_path).context("failed to read new archive")?;
|
||||
let filesystem =
|
||||
redox_initfs::InitFs::new(&data, None).context("failed to parse archive header")?;
|
||||
let inode = filesystem
|
||||
.get_inode(redox_initfs::InitFs::ROOT_INODE)
|
||||
.ok_or_else(|| anyhow!("Failed to get root inode"))?;
|
||||
|
||||
let tree = build_tree(filesystem, inode)?;
|
||||
|
||||
let reference_tree = Node::dir([(
|
||||
b"foo",
|
||||
Node::dir([
|
||||
(
|
||||
b"file.txt".as_slice(),
|
||||
Node::file(b"This is a file meant to be used in a redox-initfs test.\n"),
|
||||
),
|
||||
(b"file-link.txt".as_slice(), Node::link(b"foo/file.txt")),
|
||||
]),
|
||||
)]);
|
||||
|
||||
assert_eq!(tree, reference_tree);
|
||||
|
||||
Ok(())
|
||||
}
|
||||
Reference in New Issue
Block a user