VFS fixes and improvements, update README.md

`vfs ls`: Now displays size, detected file format, and decompressed
size (if applicable). `-r`/`--recursive` lists files recursively.
`-s`/`--short` prints only filenames.

`vfs cp`: Copies files recursively when the source is a directory.
`--no-decompress` disables automatic decompression for Yay0/Yaz0.
`-q` disables printing copied files.

`rarc` and `u8` commands are now thin wrappers over `vfs ls` and
`vfs cp`. For example, `rarc list file.arc` is now equivalent to
`vfs ls file.arc:`. `rarc extract file.arc -o out` is equivalent
to `vfs cp file.arc: out`.

Cargo.lock

@@ -440,6 +440,7 @@ dependencies = [
  "serde_repr",
  "serde_yaml",
  "sha-1",
+ "size",
  "supports-color 3.0.1",
  "syntect",
  "tracing",
@@ -917,9 +918,9 @@ dependencies = [
 
 [[package]]
 name = "nod"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "75b9bd092c2ebed932654aa6de256e39d2156ce8c87ace31191f8086f6d22f02"
+checksum = "8fc8822a8dac202a8589b1c49c7916bf8dec0adb8e8048f4f5cb979f9f4bc5e9"
 dependencies = [
  "adler",
  "aes",
@@ -942,9 +943,9 @@ dependencies = [
 
 [[package]]
 name = "nodtool"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "598b0c24bb98d0094d37e8dc8d83bb600d857c9e42a475806ac1667ec52afbb3"
+checksum = "7f838d5c364ae3f04fbec424baa64facadb401b8114a6b1f96ea35b2d99f5e13"
 dependencies = [
  "argp",
  "base16ct",

Cargo.toml

@@ -69,6 +69,7 @@ serde_json = "1.0"
 serde_repr = "0.1"
 serde_yaml = "0.9"
 sha-1 = "0.10"
+size = "0.4"
 supports-color = "3.0"
 syntect = { version = "5.2", features = ["parsing", "regex-fancy", "dump-load"], default-features = false }
 tracing = "0.1"

README.md

@@ -46,6 +46,8 @@ project structure and build system that uses decomp-toolkit under the hood.
   - [rarc extract](#rarc-extract)
   - [u8 list](#u8-list)
   - [u8 extract](#u8-extract)
+  - [vfs ls](#vfs-ls)
+  - [vfs cp](#vfs-cp)
   - [yay0 decompress](#yay0-decompress)
   - [yay0 compress](#yay0-compress)
   - [yaz0 decompress](#yaz0-decompress)
@@ -89,8 +91,6 @@ binary that is byte-for-byte identical to the original, then we know that the de
 decomp-toolkit provides tooling for analyzing and splitting the original binary into relocatable objects, as well
 as generating the linker script and other files needed to link the decompiled code.
 
-
-
 ## Analyzer features
 
 **Function boundary analysis**  
@@ -126,11 +126,6 @@ If desired, optionally writes GNU assembler-compatible files alongside the objec
 **Linker script generation**  
 Generates `ldscript.lcf` for `mwldeppc.exe`.
 
-**Future work**
-
-- Support RSO files
-- Add more signatures
-
 ## Commands
 
 ### ar create
@@ -181,6 +176,8 @@ and its `nodtool` command line tool._
 
 Displays information about disc images.
 
+To list the contents of a disc image, use [vfs ls](#vfs-ls).
+
 Supported disc image formats:
 
 - ISO (GCM)
@@ -201,6 +198,8 @@ Extracts the contents of disc images to a directory.
 
 See [disc info](#disc-info) for supported formats.
 
+See [vfs cp](#vfs-cp) for a more powerful and flexible extraction tool that supports disc images.
+
 ```shell
 $ dtk disc extract /path/to/game.iso [outdir]
 ```
@@ -235,21 +234,23 @@ $ dtk disc verify /path/to/game.iso
 
 Analyzes a DOL file and outputs information section and symbol information.
 
+See [vfs ls](#vfs-ls) for information on the VFS abstraction.
+
 ```shell
 $ dtk dol info input.dol
+# or, directly from a disc image
+$ dtk dol info 'disc.rvz:sys/main.dol'
 ```
 
 ### dol split
 
-> [!NOTE]  
+> [!IMPORTANT]  
-> This command is a work-in-progress.
+> **This command is intended to be used as part of a decompilation project's build system.**  
+> For an example project structure and for documentation on the configuration, see
+> [dtk-template](https://github.com/encounter/dtk-template).
 
 Analyzes and splits a DOL file into relocatable objects based on user configuration.
 
-**This command is intended to be used as part of a decompilation project's build system.**  
-For an example project structure and for documentation on the configuration, see
-[dtk-template](https://github.com/encounter/dtk-template).
-
 ```shell
 $ dtk dol split config.yml target
 ```
@@ -348,8 +349,12 @@ $ dtk map symbol Game.MAP 'Function__5ClassFv'
 
 Prints information about a REL file.
 
+See [vfs ls](#vfs-ls) for information on the VFS abstraction.
+
 ```shell
 $ dtk rel info input.rel
+# or, directly from a disc image
+$ dtk rel info 'disc.rvz:files/RELS.arc:amem/d_a_tag_so.rel'
 ```
 
 ### rel merge
@@ -412,6 +417,10 @@ $ dtk nlzss decompress rels/*.lz -o rels
 
 ### rarc list
 
+> [!NOTE]  
+> [vfs ls](#vfs-ls) is more powerful and supports RARC archives.  
+> This command is now equivalent to `dtk vfs ls input.arc:`
+
 Lists the contents of an RARC (older .arc) archive.
 
 ```shell
@@ -420,6 +429,10 @@ $ dtk rarc list input.arc
 
 ### rarc extract
 
+> [!NOTE]  
+> [vfs cp](#vfs-cp) is more powerful and supports RARC archives.  
+> This command is now equivalent to `dtk vfs cp input.arc: output_dir`
+
 Extracts the contents of an RARC (older .arc) archive.
 
 ```shell
@@ -428,6 +441,10 @@ $ dtk rarc extract input.arc -o output_dir
 
 ### u8 list
 
+> [!NOTE]
+> [vfs ls](#vfs-ls) is more powerful and supports U8 archives.  
+> This command is now equivalent to `dtk vfs ls input.arc:`
+
 Extracts the contents of a U8 (newer .arc) archive.
 
 ```shell
@@ -436,12 +453,75 @@ $ dtk u8 list input.arc
 
 ### u8 extract
 
+> [!NOTE]
+> [vfs cp](#vfs-cp) is more powerful and supports U8 archives.  
+> This command is now equivalent to `dtk vfs cp input.arc: output_dir`
+
 Extracts the contents of a U8 (newer .arc) archive.
 
 ```shell
 $ dtk u8 extract input.arc -o output_dir
 ```
 
+### vfs ls
+
+decomp-toolkit has a powerful virtual filesystem (VFS) abstraction that allows you to work with a
+variety of containers. All operations happen in memory with minimal overhead and no temporary files.
+
+Supported containers:
+
+- Disc images (see [disc info](#disc-info) for supported formats)
+- RARC archives (older .arc)
+- U8 archives (newer .arc)
+
+Supported compression formats are handled transparently:
+- Yay0 (SZP) / Yaz0 (SZS)
+- NLZSS (.lz) (Use `:nlzss` in the path)
+
+`vfs ls` lists the contents of a container or directory.
+
+Options:
+
+- `-r`, `--recursive`: Recursively list contents.
+- `-s`, `--short`: Only list file names.
+
+Examples:
+
+```shell
+# List the contents of the `amem` directory inside `RELS.arc` in a disc image
+$ dtk vfs ls 'disc.rvz:files/RELS.arc:amem'
+# List the contents of `RELS.arc` recursively
+$ dtk vfs ls -r 'disc.rvz:files/RELS.arc:'
+
+# All commands that accept a file path can also accept a VFS path
+$ dtk rel info 'disc.rvz:files/RELS.arc:amem/d_a_tag_so.rel'
+# Example disc image within a disc image
+$ dtk dol info 'disc.rvz:files/zz_demo.tgc:sys/main.dol'
+````
+
+### vfs cp
+
+See [vfs ls](#vfs-ls) for information on the VFS abstraction.
+
+`vfs cp` copies files and directories recursively to the host filesystem.
+
+Options:
+
+- `--no-decompress`: Do not decompress files when copying.
+- `-q`, `--quiet`: Suppresses all output except errors.
+
+Examples:
+
+```shell
+# Extract a file from a nested path in a disc image to the current directory
+$ dtk vfs cp 'disc.rvz:files/RELS.arc:amem/d_a_tag_so.rel' .
+
+# Directories are copied recursively, making it easy to extract entire archives
+$ dtk vfs cp 'disc.rvz:files/RELS.arc:' rels
+# Or, to disable automatic decompression
+$ dtk vfs cp --no-decompress 'disc.rvz:files/RELS.arc:' rels
+```
+
 ### yay0 decompress
 
 Decompresses Yay0-compressed files.

src/cmd/alf.rs

@@ -13,7 +13,7 @@ use crate::{
         file::buf_writer,
         reader::{Endian, FromReader},
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -61,7 +61,7 @@ pub fn run(args: Args) -> Result<()> {
 
 fn hashes(args: HashesArgs) -> Result<()> {
     let alf_file = {
-        let mut file = open_path(&args.alf_file, true)?;
+        let mut file = open_file(&args.alf_file, true)?;
         AlfFile::from_reader(file.as_mut(), Endian::Little)?
     };
     let mut w: Box<dyn Write> = if let Some(output) = args.output {

src/cmd/ar.rs

@@ -11,7 +11,7 @@ use object::{Object, ObjectSymbol, SymbolScope};
 
 use crate::{
     util::file::{buf_writer, process_rsp},
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -83,7 +83,7 @@ fn create(args: CreateArgs) -> Result<()> {
             Entry::Vacant(e) => e.insert(Vec::new()),
             Entry::Occupied(_) => bail!("Duplicate file name '{path_str}'"),
         };
-        let mut file = open_path(path, false)?;
+        let mut file = open_file(path, false)?;
         let obj = object::File::parse(file.map()?)?;
         for symbol in obj.symbols() {
             if symbol.scope() == SymbolScope::Dynamic {
@@ -129,7 +129,7 @@ fn extract(args: ExtractArgs) -> Result<()> {
             println!("Extracting {} to {}", path.display(), out_dir.display());
         }
 
-        let mut file = open_path(path, false)?;
+        let mut file = open_file(path, false)?;
         let mut archive = ar::Archive::new(file.map()?);
         while let Some(entry) = archive.next_entry() {
             let mut entry =

src/cmd/dol.rs

@@ -56,7 +56,7 @@ use crate::{
         split::{is_linker_generated_object, split_obj, update_splits},
         IntoCow, ToCow,
     },
-    vfs::{open_fs, open_path, open_path_fs, ArchiveKind, Vfs, VfsFile},
+    vfs::{open_file, open_file_with_fs, open_fs, ArchiveKind, Vfs, VfsFile},
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -485,7 +485,7 @@ fn apply_selfile(obj: &mut ObjInfo, buf: &[u8]) -> Result<()> {
 
 pub fn info(args: InfoArgs) -> Result<()> {
     let mut obj = {
-        let mut file = open_path(&args.dol_file, true)?;
+        let mut file = open_file(&args.dol_file, true)?;
         process_dol(file.map()?, "")?
     };
     apply_signatures(&mut obj)?;
@@ -504,7 +504,7 @@ pub fn info(args: InfoArgs) -> Result<()> {
     apply_signatures_post(&mut obj)?;
 
     if let Some(selfile) = &args.selfile {
-        let mut file = open_path(selfile, true)?;
+        let mut file = open_file(selfile, true)?;
         apply_selfile(&mut obj, file.map()?)?;
     }
 
@@ -847,7 +847,7 @@ fn load_analyze_dol(config: &ProjectConfig, object_base: &ObjectBase) -> Result<
 
     if let Some(selfile) = &config.selfile {
         log::info!("Loading {}", selfile.display());
-        let mut file = open_path(selfile, true)?;
+        let mut file = open_file(selfile, true)?;
         let data = file.map()?;
         if let Some(hash) = &config.selfile_hash {
             verify_hash(data, hash)?;
@@ -1009,7 +1009,7 @@ fn split_write_obj(
 
 fn write_if_changed(path: &Path, contents: &[u8]) -> Result<()> {
     if path.is_file() {
-        let mut old_file = open_path(path, true)?;
+        let mut old_file = open_file(path, true)?;
         let old_data = old_file.map()?;
         // If the file is the same size, check if the contents are the same
         // Avoid writing if unchanged, since it will update the file's mtime
@@ -1098,7 +1098,7 @@ fn split(args: SplitArgs) -> Result<()> {
     let command_start = Instant::now();
     info!("Loading {}", args.config.display());
     let mut config: ProjectConfig = {
-        let mut config_file = open_path(&args.config, true)?;
+        let mut config_file = open_file(&args.config, true)?;
         serde_yaml::from_reader(config_file.as_mut())?
     };
     let object_base = find_object_base(&config)?;
@@ -1550,7 +1550,7 @@ fn symbol_name_fuzzy_eq(a: &ObjSymbol, b: &ObjSymbol) -> bool {
 
 fn diff(args: DiffArgs) -> Result<()> {
     log::info!("Loading {}", args.config.display());
-    let mut config_file = open_path(&args.config, true)?;
+    let mut config_file = open_file(&args.config, true)?;
     let config: ProjectConfig = serde_yaml::from_reader(config_file.as_mut())?;
     let object_base = find_object_base(&config)?;
 
@@ -1731,7 +1731,7 @@ fn diff(args: DiffArgs) -> Result<()> {
 
 fn apply(args: ApplyArgs) -> Result<()> {
     log::info!("Loading {}", args.config.display());
-    let mut config_file = open_path(&args.config, true)?;
+    let mut config_file = open_file(&args.config, true)?;
     let config: ProjectConfig = serde_yaml::from_reader(config_file.as_mut())?;
     let object_base = find_object_base(&config)?;
 
@@ -2012,9 +2012,9 @@ impl ObjectBase {
 
     pub fn open(&self, path: &Path) -> Result<Box<dyn VfsFile>> {
         match self {
-            ObjectBase::None => open_path(path, true),
+            ObjectBase::None => open_file(path, true),
-            ObjectBase::Directory(base) => open_path(&base.join(path), true),
+            ObjectBase::Directory(base) => open_file(&base.join(path), true),
-            ObjectBase::Vfs(vfs_path, vfs) => open_path_fs(vfs.clone(), path, true)
+            ObjectBase::Vfs(vfs_path, vfs) => open_file_with_fs(vfs.clone(), path, true)
                 .with_context(|| format!("Using disc image {}", vfs_path.display())),
         }
     }
@@ -2027,12 +2027,12 @@ pub fn find_object_base(config: &ProjectConfig) -> Result<ObjectBase> {
             let entry = result?;
             if entry.file_type()?.is_file() {
                 let path = entry.path();
-                let mut file = open_path(&path, false)?;
+                let mut file = open_file(&path, false)?;
                 let format = nodtool::nod::Disc::detect(file.as_mut())?;
-                if format.is_some() {
+                if let Some(format) = format {
                     file.rewind()?;
                     log::info!("Using disc image {}", path.display());
-                    let fs = open_fs(file, ArchiveKind::Disc)?;
+                    let fs = open_fs(file, ArchiveKind::Disc(format))?;
                     return Ok(ObjectBase::Vfs(path, fs));
                 }
             }

src/cmd/dwarf.rs

@@ -24,7 +24,7 @@ use crate::{
         },
         file::buf_writer,
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -76,7 +76,7 @@ fn dump(args: DumpArgs) -> Result<()> {
     let theme = theme_set.themes.get("Solarized (dark)").context("Failed to load theme")?;
     let syntax = syntax_set.find_syntax_by_name("C++").context("Failed to find syntax")?.clone();
 
-    let mut file = open_path(&args.in_file, true)?;
+    let mut file = open_file(&args.in_file, true)?;
     let buf = file.map()?;
     if buf.starts_with(b"!<arch>\n") {
         let mut archive = ar::Archive::new(buf);

src/cmd/elf2dol.rs

@@ -7,7 +7,7 @@ use anyhow::{anyhow, bail, ensure, Result};
 use argp::FromArgs;
 use object::{Architecture, Endianness, Object, ObjectKind, ObjectSection, SectionKind};
 
-use crate::{util::file::buf_writer, vfs::open_path};
+use crate::{util::file::buf_writer, vfs::open_file};
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
 /// Converts an ELF file to a DOL file.
@@ -46,7 +46,7 @@ const MAX_TEXT_SECTIONS: usize = 7;
 const MAX_DATA_SECTIONS: usize = 11;
 
 pub fn run(args: Args) -> Result<()> {
-    let mut file = open_path(&args.elf_file, true)?;
+    let mut file = open_file(&args.elf_file, true)?;
     let obj_file = object::read::File::parse(file.map()?)?;
     match obj_file.architecture() {
         Architecture::PowerPc => {}

src/cmd/map.rs

@@ -11,7 +11,7 @@ use crate::{
         map::{create_obj, process_map, SymbolEntry, SymbolRef},
         split::update_splits,
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -75,7 +75,7 @@ pub fn run(args: Args) -> Result<()> {
 }
 
 fn entries(args: EntriesArgs) -> Result<()> {
-    let mut file = open_path(&args.map_file, true)?;
+    let mut file = open_file(&args.map_file, true)?;
     let entries = process_map(file.as_mut(), None, None)?;
     match entries.unit_entries.get_vec(&args.unit) {
         Some(vec) => {
@@ -106,7 +106,7 @@ fn entries(args: EntriesArgs) -> Result<()> {
 }
 
 fn symbol(args: SymbolArgs) -> Result<()> {
-    let mut file = open_path(&args.map_file, true)?;
+    let mut file = open_file(&args.map_file, true)?;
     log::info!("Processing map...");
     let entries = process_map(file.as_mut(), None, None)?;
     log::info!("Done!");
@@ -181,7 +181,7 @@ fn symbol(args: SymbolArgs) -> Result<()> {
 }
 
 fn config(args: ConfigArgs) -> Result<()> {
-    let mut file = open_path(&args.map_file, true)?;
+    let mut file = open_file(&args.map_file, true)?;
     log::info!("Processing map...");
     let entries = process_map(file.as_mut(), None, None)?;
     let mut obj = create_obj(&entries)?;

src/cmd/nlzss.rs

@@ -5,7 +5,7 @@ use argp::FromArgs;
 
 use crate::{
     util::{file::process_rsp, IntoCow, ToCow},
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -45,7 +45,7 @@ fn decompress(args: DecompressArgs) -> Result<()> {
     let files = process_rsp(&args.files)?;
     let single_file = files.len() == 1;
     for path in files {
-        let mut file = open_path(&path, false)?;
+        let mut file = open_file(&path, false)?;
         let data = nintendo_lz::decompress(&mut file)
             .map_err(|e| anyhow!("Failed to decompress '{}' with NLZSS: {}", path.display(), e))?;
         let out_path = if let Some(output) = &args.output {

src/cmd/rarc.rs

@@ -1,12 +1,9 @@
 use std::path::PathBuf;
 
-use anyhow::{anyhow, Result};
+use anyhow::Result;
 use argp::FromArgs;
 
-use crate::{
+use super::vfs;
-    util::rarc::{RarcNodeKind, RarcView},
-    vfs::open_path,
-};
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for processing RSO files.
@@ -30,6 +27,9 @@ pub struct ListArgs {
     #[argp(positional)]
     /// RARC file
     file: PathBuf,
+    #[argp(switch, short = 's')]
+    /// Only print filenames.
+    short: bool,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
@@ -42,8 +42,11 @@ pub struct ExtractArgs {
     #[argp(option, short = 'o')]
     /// output directory
     output: Option<PathBuf>,
+    #[argp(switch)]
+    /// Do not decompress files when copying.
+    no_decompress: bool,
     #[argp(switch, short = 'q')]
-    /// quiet output
+    /// Quiet output. Don't print anything except errors.
     quiet: bool,
 }
 
@@ -55,42 +58,16 @@ pub fn run(args: Args) -> Result<()> {
 }
 
 fn list(args: ListArgs) -> Result<()> {
-    let mut file = open_path(&args.file, true)?;
+    let path = PathBuf::from(format!("{}:", args.file.display()));
-    let view = RarcView::new(file.map()?).map_err(|e| anyhow!(e))?;
+    vfs::ls(vfs::LsArgs { path, short: args.short, recursive: true })
-    test(&view, "")?;
-    test(&view, "/")?;
-    test(&view, "//")?;
-    test(&view, "/rels")?;
-    test(&view, "/rels/")?;
-    test(&view, "/rels/amem")?;
-    test(&view, "/rels/amem/")?;
-    test(&view, "/rels/mmem")?;
-    test(&view, "/rels/mmem/../mmem")?;
-    test(&view, "/rels/amem/d_a_am.rel")?;
-    test(&view, "//amem/d_a_am.rel")?;
-    test(&view, "amem/d_a_am.rel")?;
-    test(&view, "amem/d_a_am.rel/")?;
-    test(&view, "mmem/d_a_obj_pirateship.rel")?;
-    test(&view, "mmem//d_a_obj_pirateship.rel")?;
-    test(&view, "mmem/da_obj_pirateship.rel")?;
-    Ok(())
 }
 
-fn test(view: &RarcView, path: &str) -> Result<()> {
+fn extract(args: ExtractArgs) -> Result<()> {
-    let option = view.find(path);
+    let path = PathBuf::from(format!("{}:", args.file.display()));
-    let data = if let Some(RarcNodeKind::File(_, node)) = option {
+    let output = args.output.unwrap_or_else(|| PathBuf::from("."));
-        view.get_data(node).map_err(|e| anyhow!(e))?
+    vfs::cp(vfs::CpArgs {
-    } else {
+        paths: vec![path, output],
-        &[]
+        no_decompress: args.no_decompress,
-    };
+        quiet: args.quiet,
-    let vec = data.iter().cloned().take(4).collect::<Vec<_>>();
+    })
-    println!("{:?}: {:?} (len: {:?})", path, option, vec.as_slice());
-    // if let Some(RarcNodeKind::Directory(_, dir)) = option {
-    //     for node in view.children(dir) {
-    //         println!("Child: {:?} ({:?})", node, view.get_string(node.name_offset()));
-    //     }
-    // }
-    Ok(())
 }
-
-fn extract(_args: ExtractArgs) -> Result<()> { todo!() }

src/cmd/rel.rs

@@ -41,7 +41,7 @@ use crate::{
         },
         IntoCow, ToCow,
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -264,7 +264,7 @@ fn make(args: MakeArgs) -> Result<()> {
     let mut name_to_module_id = FxHashMap::<String, u32>::default();
     if let Some(config_path) = &args.config {
         let config: ProjectConfig = {
-            let mut file = open_path(config_path, true)?;
+            let mut file = open_file(config_path, true)?;
             serde_yaml::from_reader(file.as_mut())?
         };
         let object_base = find_object_base(&config)?;
@@ -293,7 +293,7 @@ fn make(args: MakeArgs) -> Result<()> {
     }
 
     // Load all modules
-    let mut files = paths.iter().map(|p| open_path(p, true)).collect::<Result<Vec<_>>>()?;
+    let mut files = paths.iter().map(|p| open_file(p, true)).collect::<Result<Vec<_>>>()?;
     let modules = files
         .par_iter_mut()
         .enumerate()
@@ -405,7 +405,7 @@ fn make(args: MakeArgs) -> Result<()> {
 }
 
 fn info(args: InfoArgs) -> Result<()> {
-    let mut file = open_path(&args.rel_file, true)?;
+    let mut file = open_file(&args.rel_file, true)?;
     let (header, mut module_obj) = process_rel(file.as_mut(), "")?;
 
     let mut state = AnalyzerState::default();
@@ -475,7 +475,7 @@ const fn align32(x: u32) -> u32 { (x + 31) & !31 }
 fn merge(args: MergeArgs) -> Result<()> {
     log::info!("Loading {}", args.dol_file.display());
     let mut obj = {
-        let mut file = open_path(&args.dol_file, true)?;
+        let mut file = open_file(&args.dol_file, true)?;
         let name = args.dol_file.file_stem().map(|s| s.to_string_lossy()).unwrap_or_default();
         process_dol(file.map()?, name.as_ref())?
     };

src/cmd/rso.rs

@@ -20,7 +20,7 @@ use crate::{
             RSO_SECTION_NAMES,
         },
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -77,7 +77,7 @@ pub fn run(args: Args) -> Result<()> {
 
 fn info(args: InfoArgs) -> Result<()> {
     let rso = {
-        let mut file = open_path(&args.rso_file, true)?;
+        let mut file = open_file(&args.rso_file, true)?;
         let obj = process_rso(file.as_mut())?;
         #[allow(clippy::let_and_return)]
         obj
@@ -87,7 +87,7 @@ fn info(args: InfoArgs) -> Result<()> {
 }
 
 fn make(args: MakeArgs) -> Result<()> {
-    let mut file = open_path(&args.input, true)?;
+    let mut file = open_file(&args.input, true)?;
     let obj_file = object::read::File::parse(file.map()?)?;
     match obj_file.architecture() {
         Architecture::PowerPc => {}
@@ -102,7 +102,7 @@ fn make(args: MakeArgs) -> Result<()> {
 
     let symbols_to_export = match &args.export {
         Some(export_file_path) => {
-            let export_file_reader = open_path(export_file_path, true)?;
+            let export_file_reader = open_file(export_file_path, true)?;
             export_file_reader.lines().map_while(Result::ok).collect()
         }
         None => vec![],

src/cmd/shasum.rs

@@ -12,7 +12,7 @@ use sha1::{Digest, Sha1};
 
 use crate::{
     util::file::{buf_writer, process_rsp, touch},
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
@@ -39,7 +39,7 @@ const DEFAULT_BUF_SIZE: usize = 8192;
 pub fn run(args: Args) -> Result<()> {
     if args.check {
         for path in process_rsp(&args.files)? {
-            let mut file = open_path(&path, false)?;
+            let mut file = open_file(&path, false)?;
             check(&args, file.as_mut())?;
         }
         if let Some(out_path) = &args.output {
@@ -56,7 +56,7 @@ pub fn run(args: Args) -> Result<()> {
                 Box::new(stdout())
             };
         for path in process_rsp(&args.files)? {
-            let mut file = open_path(&path, false)?;
+            let mut file = open_file(&path, false)?;
             hash(w.as_mut(), file.as_mut(), &path)?
         }
     }

src/cmd/u8_arc.rs

@@ -1,16 +1,9 @@
-use std::{borrow::Cow, fs, fs::DirBuilder, path::PathBuf};
+use std::path::PathBuf;
 
-use anyhow::{anyhow, Context, Result};
+use anyhow::Result;
 use argp::FromArgs;
-use itertools::Itertools;
 
-use crate::{
+use super::vfs;
-    util::{
-        file::decompress_if_needed,
-        u8_arc::{U8Node, U8View},
-    },
-    vfs::open_path,
-};
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for processing U8 (arc) files.
@@ -34,6 +27,9 @@ pub struct ListArgs {
     #[argp(positional)]
     /// U8 (arc) file
     file: PathBuf,
+    #[argp(switch, short = 's')]
+    /// Only print filenames.
+    short: bool,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
@@ -46,8 +42,11 @@ pub struct ExtractArgs {
     #[argp(option, short = 'o')]
     /// output directory
     output: Option<PathBuf>,
+    #[argp(switch)]
+    /// Do not decompress files when copying.
+    no_decompress: bool,
     #[argp(switch, short = 'q')]
-    /// quiet output
+    /// Quiet output. Don't print anything except errors.
     quiet: bool,
 }
 
@@ -59,66 +58,16 @@ pub fn run(args: Args) -> Result<()> {
 }
 
 fn list(args: ListArgs) -> Result<()> {
-    let mut file = open_path(&args.file, true)?;
+    let path = PathBuf::from(format!("{}:", args.file.display()));
-    let view = U8View::new(file.map()?)
+    vfs::ls(vfs::LsArgs { path, short: args.short, recursive: true })
-        .map_err(|e| anyhow!("Failed to open U8 file '{}': {}", args.file.display(), e))?;
-    visit_files(&view, |_, node, path| {
-        println!("{}: {} bytes, offset {:#X}", path, node.length(), node.offset());
-        Ok(())
-    })
 }
 
 fn extract(args: ExtractArgs) -> Result<()> {
-    let mut file = open_path(&args.file, true)?;
+    let path = PathBuf::from(format!("{}:", args.file.display()));
-    let data = file.map()?;
+    let output = args.output.unwrap_or_else(|| PathBuf::from("."));
-    let view = U8View::new(data)
+    vfs::cp(vfs::CpArgs {
-        .map_err(|e| anyhow!("Failed to open U8 file '{}': {}", args.file.display(), e))?;
+        paths: vec![path, output],
-    visit_files(&view, |_, node, path| {
+        no_decompress: args.no_decompress,
-        let offset = node.offset();
+        quiet: args.quiet,
-        let size = node.length();
-        let file_data =
-            decompress_if_needed(&data[offset as usize..offset as usize + size as usize])?;
-        let output_path = args
-            .output
-            .as_ref()
-            .map(|p| p.join(&path))
-            .unwrap_or_else(|| PathBuf::from(path.clone()));
-        if !args.quiet {
-            println!("Extracting {} to {} ({} bytes)", path, output_path.display(), size);
-        }
-        if let Some(parent) = output_path.parent() {
-            DirBuilder::new().recursive(true).create(parent)?;
-        }
-        fs::write(&output_path, file_data)
-            .with_context(|| format!("Failed to write file '{}'", output_path.display()))?;
-        Ok(())
     })
 }
-
-fn visit_files(
-    view: &U8View,
-    mut visitor: impl FnMut(usize, U8Node, String) -> Result<()>,
-) -> Result<()> {
-    let mut path_segments = Vec::<(Cow<str>, usize)>::new();
-    for (idx, node, name) in view.iter() {
-        // Remove ended path segments
-        let mut new_size = 0;
-        for (_, end) in path_segments.iter() {
-            if *end == idx {
-                break;
-            }
-            new_size += 1;
-        }
-        path_segments.truncate(new_size);
-
-        // Add the new path segment
-        let end = if node.is_dir() { node.length() as usize } else { idx + 1 };
-        path_segments.push((name.map_err(|e| anyhow!("{}", e))?, end));
-
-        let path = path_segments.iter().map(|(name, _)| name.as_ref()).join("/");
-        if !node.is_dir() {
-            visitor(idx, node, path)?;
-        }
-    }
-    Ok(())
-}

src/cmd/vfs.rs

@@ -1,10 +1,19 @@
-use std::{fs::File, io, io::Write, path::PathBuf};
+use std::{
+    fs,
+    fs::File,
+    io,
+    io::{BufRead, Write},
+    path::{Path, PathBuf},
+};
 
-use anyhow::{anyhow, bail};
+use anyhow::{anyhow, bail, Context};
 use argp::FromArgs;
-use nodtool::nod::ResultContext;
+use size::Size;
 
-use crate::vfs::{decompress_file, detect, open_fs, FileFormat, StdFs, Vfs, VfsFileType};
+use crate::vfs::{
+    decompress_file, detect, open_path, FileFormat, OpenResult, Vfs, VfsFile, VfsFileType,
+    VfsMetadata,
+};
 
 #[derive(FromArgs, PartialEq, Debug)]
 /// Commands for interacting with discs and containers.
@@ -26,8 +35,14 @@ enum SubCommand {
 #[argp(subcommand, name = "ls")]
 pub struct LsArgs {
     #[argp(positional)]
-    /// Path to the container.
+    /// Directory or container path.
-    path: PathBuf,
+    pub path: PathBuf,
+    #[argp(switch, short = 's')]
+    /// Only print filenames.
+    pub short: bool,
+    #[argp(switch, short = 'r')]
+    /// Recursively list files in directories.
+    pub recursive: bool,
 }
 
 #[derive(FromArgs, PartialEq, Eq, Debug)]
@@ -36,7 +51,13 @@ pub struct LsArgs {
 pub struct CpArgs {
     #[argp(positional)]
     /// Source path(s) and destination path.
-    paths: Vec<PathBuf>,
+    pub paths: Vec<PathBuf>,
+    #[argp(switch)]
+    /// Do not decompress files when copying.
+    pub no_decompress: bool,
+    #[argp(switch, short = 'q')]
+    /// Quiet output. Don't print anything except errors.
+    pub quiet: bool,
 }
 
 pub fn run(args: Args) -> anyhow::Result<()> {
@@ -46,75 +67,248 @@ pub fn run(args: Args) -> anyhow::Result<()> {
     }
 }
 
-fn find(path: &str) -> anyhow::Result<(Box<dyn Vfs>, &str)> {
+const SEPARATOR: &str = " | ";
-    let mut split = path.split(':');
+type Columns<const N: usize> = [String; N];
-    let mut fs: Box<dyn Vfs> = Box::new(StdFs);
+
-    let mut path = split.next().unwrap();
+fn column_widths<const N: usize>(entries: &[Columns<N>]) -> [usize; N] {
-    for next in split {
+    let mut widths = [0usize; N];
-        let mut file = fs.open(path)?;
+    for text in entries {
-        match detect(file.as_mut())? {
+        for (i, column) in text.iter().enumerate() {
-            FileFormat::Archive(kind) => {
+            widths[i] = widths[i].max(column.len());
-                fs = open_fs(file, kind)?;
-                path = next;
-            }
-            _ => bail!("'{}' is not a container", path),
         }
     }
-    Ok((fs, path))
+    widths
 }
 
-fn ls(args: LsArgs) -> anyhow::Result<()> {
+fn file_info(
-    let str = args.path.to_str().ok_or_else(|| anyhow!("Path is not valid UTF-8"))?;
+    filename: &str,
-    let (mut fs, mut path) = find(str)?;
+    file: &mut dyn VfsFile,
-    let metadata = fs.metadata(path)?;
+    metadata: &VfsMetadata,
-    if metadata.is_file() {
+) -> anyhow::Result<Columns<5>> {
-        let mut file = fs.open(path)?;
+    let format =
-        match detect(file.as_mut())? {
+        detect(file).with_context(|| format!("Failed to detect file format for {}", filename))?;
-            FileFormat::Archive(kind) => {
+    let mut info: Columns<5> = [
-                fs = open_fs(file, kind)?;
+        Size::from_bytes(metadata.len).to_string(),
-                path = "";
+        filename.to_string(),
+        format.to_string(),
+        String::new(),
+        String::new(),
+    ];
+    if let FileFormat::Compressed(kind) = format {
+        let mut decompressed = decompress_file(file, kind)?;
+        let metadata = decompressed
+            .metadata()
+            .with_context(|| format!("Failed to fetch metadata for {}", filename))?;
+        let format = detect(decompressed.as_mut())
+            .with_context(|| format!("Failed to detect file format for {}", filename))?;
+        info[3] = format!("Decompressed: {}", Size::from_bytes(metadata.len));
+        info[4] = format.to_string();
+    }
+    Ok(info)
+}
+
+pub fn ls(args: LsArgs) -> anyhow::Result<()> {
+    let mut files = Vec::new();
+    match open_path(&args.path, false)? {
+        OpenResult::File(mut file, path) => {
+            let filename = Path::new(path)
+                .file_name()
+                .ok_or_else(|| anyhow!("Path has no filename"))?
+                .to_string_lossy();
+            if args.short {
+                println!("{}", filename);
+            } else {
+                let metadata = file
+                    .metadata()
+                    .with_context(|| format!("Failed to fetch metadata for {}", path))?;
+                files.push(file_info(&filename, file.as_mut(), &metadata)?);
             }
-            _ => bail!("'{}' is not a directory", path),
+        }
+        OpenResult::Directory(mut fs, path) => {
+            ls_directory(fs.as_mut(), path, "", &args, &mut files)?;
         }
     }
-    let entries = fs.read_dir(path)?;
+    if !args.short {
-    for entry in entries {
+        let widths = column_widths(&files);
-        println!("{}", entry);
+        for entry in files {
+            let mut written = 0;
+            for (i, column) in entry.iter().enumerate() {
+                if widths[i] > 0 {
+                    if written > 0 {
+                        print!("{}", SEPARATOR);
+                    }
+                    written += 1;
+                    print!("{:width$}", column, width = widths[i]);
+                }
+            }
+            println!();
+        }
     }
     Ok(())
 }
 
-fn cp(mut args: CpArgs) -> anyhow::Result<()> {
+fn ls_directory(
+    fs: &mut dyn Vfs,
+    path: &str,
+    base_filename: &str,
+    args: &LsArgs,
+    files: &mut Vec<Columns<5>>,
+) -> anyhow::Result<()> {
+    let entries = fs.read_dir(path)?;
+    files.reserve(entries.len());
+    for filename in entries {
+        let entry_path = format!("{}/{}", path, filename);
+        let display_filename = format!("{}{}", base_filename, filename);
+        let metadata = fs
+            .metadata(&entry_path)
+            .with_context(|| format!("Failed to fetch metadata for {}", entry_path))?;
+        match metadata.file_type {
+            VfsFileType::File => {
+                let mut file = fs
+                    .open(&entry_path)
+                    .with_context(|| format!("Failed to open file {}", entry_path))?;
+                if args.short {
+                    println!("{}", display_filename);
+                } else {
+                    files.push(file_info(&display_filename, file.as_mut(), &metadata)?);
+                }
+            }
+            VfsFileType::Directory => {
+                if args.short {
+                    println!("{}/", display_filename);
+                } else {
+                    files.push([
+                        "        ".to_string(),
+                        format!("{}/", display_filename),
+                        "Directory".to_string(),
+                        String::new(),
+                        String::new(),
+                    ]);
+                }
+                if args.recursive {
+                    let base_filename = format!("{}/", display_filename);
+                    ls_directory(fs, &entry_path, &base_filename, args, files)?;
+                }
+            }
+        }
+    }
+    Ok(())
+}
+
+pub fn cp(mut args: CpArgs) -> anyhow::Result<()> {
     if args.paths.len() < 2 {
         bail!("Both source and destination paths must be provided");
     }
     let dest = args.paths.pop().unwrap();
     let dest_is_dir = args.paths.len() > 1 || dest.metadata().ok().is_some_and(|m| m.is_dir());
+    let auto_decompress = !args.no_decompress;
     for path in args.paths {
-        let str = path.to_str().ok_or_else(|| anyhow!("Path is not valid UTF-8"))?;
+        match open_path(&path, auto_decompress)? {
-        let (mut fs, path) = find(str)?;
+            OpenResult::File(file, path) => {
-        let metadata = fs.metadata(path)?;
-        match metadata.file_type {
-            VfsFileType::File => {
-                let mut file = fs.open(path)?;
-                if let FileFormat::Compressed(kind) = detect(file.as_mut())? {
-                    file = decompress_file(file, kind)?;
-                }
                 let dest = if dest_is_dir {
-                    let name = path.rsplit('/').next().unwrap();
+                    fs::create_dir_all(&dest).with_context(|| {
-                    dest.join(name)
+                        format!("Failed to create directory {}", dest.display())
+                    })?;
+                    let filename = Path::new(path)
+                        .file_name()
+                        .ok_or_else(|| anyhow!("Path has no filename"))?;
+                    dest.join(filename)
                 } else {
                     dest.clone()
                 };
-                let mut dest_file = File::create(&dest)
+                cp_file(file, path, &dest, auto_decompress, args.quiet)?;
-                    .with_context(|| format!("Failed to create file {}", dest.display()))?;
+            }
-                io::copy(file.as_mut(), &mut dest_file)
+            OpenResult::Directory(mut fs, path) => {
-                    .with_context(|| format!("Failed to write file {}", dest.display()))?;
+                cp_recursive(fs.as_mut(), path, &dest, auto_decompress, args.quiet)?;
-                dest_file
+            }
-                    .flush()
+        }
-                    .with_context(|| format!("Failed to flush file {}", dest.display()))?;
+    }
+    Ok(())
+}
+
+fn cp_file(
+    mut file: Box<dyn VfsFile>,
+    path: &str,
+    dest: &Path,
+    auto_decompress: bool,
+    quiet: bool,
+) -> anyhow::Result<()> {
+    let mut compression = None;
+    if let FileFormat::Compressed(kind) = detect(file.as_mut())? {
+        if auto_decompress {
+            file = decompress_file(file.as_mut(), kind)
+                .with_context(|| format!("Failed to decompress file {}", dest.display()))?;
+            compression = Some(kind);
+        }
+    }
+    let metadata = file
+        .metadata()
+        .with_context(|| format!("Failed to fetch metadata for {}", dest.display()))?;
+    if !quiet {
+        if let Some(kind) = compression {
+            println!(
+                "{} -> {} ({}) [Decompressed {}]",
+                path,
+                dest.display(),
+                Size::from_bytes(metadata.len),
+                kind
+            );
+        } else {
+            println!("{} -> {} ({})", path, dest.display(), Size::from_bytes(metadata.len));
+        }
+    }
+    let mut dest_file =
+        File::create(dest).with_context(|| format!("Failed to create file {}", dest.display()))?;
+    buf_copy(file.as_mut(), &mut dest_file)
+        .with_context(|| format!("Failed to copy file {}", dest.display()))?;
+    dest_file.flush().with_context(|| format!("Failed to flush file {}", dest.display()))?;
+    Ok(())
+}
+
+fn buf_copy<R, W>(reader: &mut R, writer: &mut W) -> io::Result<u64>
+where
+    R: BufRead + ?Sized,
+    W: Write + ?Sized,
+{
+    let mut copied = 0;
+    loop {
+        let buf = reader.fill_buf()?;
+        let len = buf.len();
+        if len == 0 {
+            break;
+        }
+        writer.write_all(buf)?;
+        reader.consume(len);
+        copied += len as u64;
+    }
+    Ok(copied)
+}
+
+fn cp_recursive(
+    fs: &mut dyn Vfs,
+    path: &str,
+    dest: &Path,
+    auto_decompress: bool,
+    quiet: bool,
+) -> anyhow::Result<()> {
+    fs::create_dir_all(dest)
+        .with_context(|| format!("Failed to create directory {}", dest.display()))?;
+    let entries = fs.read_dir(path)?;
+    for filename in entries {
+        let entry_path = format!("{}/{}", path, filename);
+        let metadata = fs
+            .metadata(&entry_path)
+            .with_context(|| format!("Failed to fetch metadata for {}", entry_path))?;
+        match metadata.file_type {
+            VfsFileType::File => {
+                let file = fs
+                    .open(&entry_path)
+                    .with_context(|| format!("Failed to open file {}", entry_path))?;
+                cp_file(file, &entry_path, &dest.join(filename), auto_decompress, quiet)?;
+            }
+            VfsFileType::Directory => {
+                cp_recursive(fs, &entry_path, &dest.join(filename), auto_decompress, quiet)?;
             }
-            VfsFileType::Directory => bail!("Cannot copy directory"),
         }
     }
     Ok(())

src/cmd/yay0.rs

@@ -9,7 +9,7 @@ use crate::{
         ncompress::{compress_yay0, decompress_yay0},
         IntoCow, ToCow,
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -65,7 +65,7 @@ fn compress(args: CompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let mut file = open_path(&path, false)?;
+            let mut file = open_file(&path, false)?;
             compress_yay0(file.map()?)
         };
         let out_path = if let Some(output) = &args.output {
@@ -88,7 +88,7 @@ fn decompress(args: DecompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let mut file = open_path(&path, true)?;
+            let mut file = open_file(&path, true)?;
             decompress_yay0(file.map()?)
                 .with_context(|| format!("Failed to decompress '{}' using Yay0", path.display()))?
         };

src/cmd/yaz0.rs

@@ -9,7 +9,7 @@ use crate::{
         ncompress::{compress_yaz0, decompress_yaz0},
         IntoCow, ToCow,
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 #[derive(FromArgs, PartialEq, Debug)]
@@ -65,7 +65,7 @@ fn compress(args: CompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let mut file = open_path(&path, false)?;
+            let mut file = open_file(&path, false)?;
             compress_yaz0(file.map()?)
         };
         let out_path = if let Some(output) = &args.output {
@@ -88,7 +88,7 @@ fn decompress(args: DecompressArgs) -> Result<()> {
     let single_file = files.len() == 1;
     for path in files {
         let data = {
-            let mut file = open_path(&path, false)?;
+            let mut file = open_file(&path, false)?;
             decompress_yaz0(file.map()?)
                 .with_context(|| format!("Failed to decompress '{}' using Yaz0", path.display()))?
         };

src/util/config.rs

@@ -24,7 +24,7 @@ use crate::{
         file::{buf_writer, FileReadInfo},
         split::default_section_align,
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 pub fn parse_u32(s: &str) -> Result<u32, ParseIntError> {
@@ -49,7 +49,7 @@ pub fn apply_symbols_file<P>(path: P, obj: &mut ObjInfo) -> Result<Option<FileRe
 where P: AsRef<Path> {
     let path = path.as_ref();
     Ok(if path.is_file() {
-        let mut file = open_path(path, true)?;
+        let mut file = open_file(path, true)?;
         let cached = FileReadInfo::new(file.as_mut())?;
         for result in file.lines() {
             let line = match result {
@@ -629,7 +629,7 @@ pub fn apply_splits_file<P>(path: P, obj: &mut ObjInfo) -> Result<Option<FileRea
 where P: AsRef<Path> {
     let path = path.as_ref();
     Ok(if path.is_file() {
-        let mut file = open_path(path, true)?;
+        let mut file = open_file(path, true)?;
         let cached = FileReadInfo::new(file.as_mut())?;
         apply_splits(file.as_mut(), obj)?;
         Some(cached)
@@ -744,7 +744,7 @@ where P: AsRef<Path> {
     if !path.is_file() {
         return Ok(None);
     }
-    let file = open_path(path, true)?;
+    let file = open_file(path, true)?;
     let mut sections = Vec::new();
     let mut state = SplitState::None;
     for result in file.lines() {

src/util/elf.rs

@@ -31,7 +31,7 @@ use crate::{
         comment::{CommentSym, MWComment},
         reader::{Endian, FromReader, ToWriter},
     },
-    vfs::open_path,
+    vfs::open_file,
 };
 
 pub const SHT_MWCATS: u32 = SHT_LOUSER + 0x4A2A82C2;
@@ -48,7 +48,7 @@ enum BoundaryState {
 pub fn process_elf<P>(path: P) -> Result<ObjInfo>
 where P: AsRef<Path> {
     let path = path.as_ref();
-    let mut file = open_path(path, true)?;
+    let mut file = open_file(path, true)?;
     let obj_file = object::read::File::parse(file.map()?)?;
     let architecture = match obj_file.architecture() {
         Architecture::PowerPc => ObjArchitecture::PowerPc,

src/util/file.rs

@@ -17,7 +17,7 @@ use crate::{
         ncompress::{decompress_yay0, decompress_yaz0, YAY0_MAGIC, YAZ0_MAGIC},
         Bytes,
     },
-    vfs::{open_path, VfsFile},
+    vfs::{open_file, VfsFile},
 };
 
 /// Creates a buffered writer around a file (not memory mapped).
@@ -67,8 +67,7 @@ pub fn process_rsp(files: &[PathBuf]) -> Result<Vec<PathBuf>> {
         let path_str =
             path.to_str().ok_or_else(|| anyhow!("'{}' is not valid UTF-8", path.display()))?;
         if let Some(rsp_file) = path_str.strip_prefix('@') {
-            let rsp_path = Path::new(rsp_file);
+            let file = open_file(Path::new(rsp_file), true)?;
-            let file = open_path(rsp_path, true)?;
             for result in file.lines() {
                 let line = result?;
                 if !line.is_empty() {
@@ -123,7 +122,7 @@ impl FileIterator {
 
         let path = self.paths[self.index].clone();
         self.index += 1;
-        match open_path(&path, true) {
+        match open_file(&path, true) {
             Ok(file) => Some(Ok((path, file))),
             Err(e) => Some(Err(e)),
         }

src/util/map.rs

@@ -24,7 +24,7 @@ use crate::{
         ObjSymbols, ObjUnit,
     },
     util::nested::NestedVec,
-    vfs::open_path,
+    vfs::open_file,
 };
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum SymbolKind {
@@ -722,7 +722,7 @@ pub fn apply_map_file<P>(
 where
     P: AsRef<Path>,
 {
-    let mut file = open_path(path.as_ref(), true)?;
+    let mut file = open_file(path.as_ref(), true)?;
     let info = process_map(file.as_mut(), common_bss_start, mw_comment_version)?;
     apply_map(info, obj)
 }

src/util/rarc.rs

@@ -2,7 +2,7 @@ use std::{borrow::Cow, ffi::CStr};
 
 use zerocopy::{big_endian::*, FromBytes, Immutable, IntoBytes, KnownLayout};
 
-use crate::static_assert;
+use crate::{static_assert, vfs::next_non_empty};
 
 pub const RARC_MAGIC: [u8; 4] = *b"RARC";
 
@@ -280,13 +280,3 @@ pub enum RarcNodeKind {
     File(usize, RarcNode),
     Directory(usize, RarcDirectory),
 }
-
-fn next_non_empty<'a>(iter: &mut impl Iterator<Item = &'a str>) -> &'a str {
-    loop {
-        match iter.next() {
-            Some("") => continue,
-            Some(next) => break next,
-            None => break "",
-        }
-    }
-}

src/util/u8_arc.rs

@@ -3,7 +3,7 @@ use std::{borrow::Cow, ffi::CStr, mem::size_of};
 use anyhow::Result;
 use zerocopy::{big_endian::U32, FromBytes, Immutable, IntoBytes, KnownLayout};
 
-use crate::static_assert;
+use crate::{static_assert, vfs::next_non_empty};
 
 pub const U8_MAGIC: [u8; 4] = [0x55, 0xAA, 0x38, 0x2D];
 
@@ -178,16 +178,6 @@ impl<'a> U8View<'a> {
     }
 }
 
-fn next_non_empty<'a>(iter: &mut impl Iterator<Item = &'a str>) -> &'a str {
-    loop {
-        match iter.next() {
-            Some("") => continue,
-            Some(next) => break next,
-            None => break "",
-        }
-    }
-}
-
 /// Iterator over the nodes in a U8 archive.
 pub struct U8Iter<'a> {
     inner: &'a U8View<'a>,

src/vfs/disc.rs

@@ -10,7 +10,9 @@ use nodtool::{
     nod::{DiscStream, Fst, NodeKind, OwnedFileStream, PartitionBase, PartitionMeta},
 };
 
-use super::{StaticFile, Vfs, VfsError, VfsFile, VfsFileType, VfsMetadata, VfsResult};
+use super::{
+    next_non_empty, StaticFile, Vfs, VfsError, VfsFile, VfsFileType, VfsMetadata, VfsResult,
+};
 
 #[derive(Clone)]
 pub struct DiscFs {
@@ -36,15 +38,13 @@ impl DiscFs {
     fn find(&self, path: &str) -> VfsResult<DiscNode> {
         let path = path.trim_matches('/');
         let mut split = path.split('/');
-        let Some(segment) = split.next() else {
+        let mut segment = next_non_empty(&mut split);
-            return Ok(DiscNode::Root);
-        };
         if segment.is_empty() {
             return Ok(DiscNode::Root);
         }
         if segment.eq_ignore_ascii_case("files") {
             let fst = Fst::new(&self.meta.raw_fst)?;
-            if split.next().is_none() {
+            if next_non_empty(&mut split).is_empty() {
                 let root = fst.nodes[0];
                 return Ok(DiscNode::Node(fst, 0, root));
             }
@@ -54,9 +54,7 @@ impl DiscFs {
                 None => Ok(DiscNode::None),
             }
         } else if segment.eq_ignore_ascii_case("sys") {
-            let Some(segment) = split.next() else {
+            segment = next_non_empty(&mut split);
-                return Ok(DiscNode::Sys);
-            };
             // No directories in sys
             if split.next().is_some() {
                 return Ok(DiscNode::None);
@@ -92,8 +90,8 @@ impl Vfs for DiscFs {
     fn open(&mut self, path: &str) -> VfsResult<Box<dyn VfsFile>> {
         match self.find(path)? {
             DiscNode::None => Err(VfsError::NotFound),
-            DiscNode::Root => Err(VfsError::DirectoryExists),
+            DiscNode::Root => Err(VfsError::IsADirectory),
-            DiscNode::Sys => Err(VfsError::DirectoryExists),
+            DiscNode::Sys => Err(VfsError::IsADirectory),
             DiscNode::Node(_, _, node) => match node.kind() {
                 NodeKind::File => {
                     if node.length() > 2048 {
@@ -107,7 +105,7 @@ impl Vfs for DiscFs {
                         Ok(Box::new(StaticFile::new(Arc::from(data.as_slice()), self.mtime)))
                     }
                 }
-                NodeKind::Directory => Err(VfsError::FileExists),
+                NodeKind::Directory => Err(VfsError::IsADirectory),
                 NodeKind::Invalid => Err(VfsError::from("FST: Invalid node kind")),
             },
             DiscNode::Static(data) => Ok(Box::new(StaticFile::new(Arc::from(data), self.mtime))),
@@ -146,7 +144,7 @@ impl Vfs for DiscFs {
             }
             DiscNode::Node(fst, idx, node) => {
                 match node.kind() {
-                    NodeKind::File => return Err(VfsError::FileExists),
+                    NodeKind::File => return Err(VfsError::NotADirectory),
                     NodeKind::Directory => {}
                     NodeKind::Invalid => return Err(VfsError::from("FST: Invalid node kind")),
                 }
@@ -168,7 +166,7 @@ impl Vfs for DiscFs {
                 }
                 Ok(entries)
             }
-            DiscNode::Static(_) => Err(VfsError::FileExists),
+            DiscNode::Static(_) => Err(VfsError::NotADirectory),
         }
     }
 

src/vfs/mod.rs

@@ -72,16 +72,24 @@ dyn_clone::clone_trait_object!(VfsFile);
 #[derive(Debug)]
 pub enum VfsError {
     NotFound,
+    NotADirectory,
+    IsADirectory,
     IoError(io::Error),
     Other(String),
-    FileExists,
-    DirectoryExists,
 }
 
 pub type VfsResult<T, E = VfsError> = Result<T, E>;
 
 impl From<io::Error> for VfsError {
-    fn from(e: io::Error) -> Self { VfsError::IoError(e) }
+    fn from(e: io::Error) -> Self {
+        match e.kind() {
+            io::ErrorKind::NotFound => VfsError::NotFound,
+            // TODO: stabilized in Rust 1.83
+            // io::ErrorKind::NotADirectory => VfsError::NotADirectory,
+            // io::ErrorKind::IsADirectory => VfsError::IsADirectory,
+            _ => VfsError::IoError(e),
+        }
+    }
 }
 
 impl From<String> for VfsError {
@@ -98,33 +106,63 @@ impl Display for VfsError {
             VfsError::NotFound => write!(f, "File or directory not found"),
             VfsError::IoError(e) => write!(f, "{}", e),
             VfsError::Other(e) => write!(f, "{}", e),
-            VfsError::FileExists => write!(f, "File already exists"),
+            VfsError::NotADirectory => write!(f, "Path is a file, not a directory"),
-            VfsError::DirectoryExists => write!(f, "Directory already exists"),
+            VfsError::IsADirectory => write!(f, "Path is a directory, not a file"),
         }
     }
 }
 
 impl Error for VfsError {}
 
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum FileFormat {
     Regular,
     Compressed(CompressionKind),
     Archive(ArchiveKind),
 }
 
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+impl Display for FileFormat {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            FileFormat::Regular => write!(f, "File"),
+            FileFormat::Compressed(kind) => write!(f, "Compressed: {}", kind),
+            FileFormat::Archive(kind) => write!(f, "Archive: {}", kind),
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum CompressionKind {
     Yay0,
     Yaz0,
     Nlzss,
 }
 
-#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+impl Display for CompressionKind {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            CompressionKind::Yay0 => write!(f, "Yay0"),
+            CompressionKind::Yaz0 => write!(f, "Yaz0"),
+            CompressionKind::Nlzss => write!(f, "NLZSS"),
+        }
+    }
+}
+
+#[derive(Debug, Copy, Clone, Eq, PartialEq)]
 pub enum ArchiveKind {
     Rarc,
     U8,
-    Disc,
+    Disc(nod::Format),
+}
+
+impl Display for ArchiveKind {
+    fn fmt(&self, f: &mut Formatter) -> std::fmt::Result {
+        match self {
+            ArchiveKind::Rarc => write!(f, "RARC"),
+            ArchiveKind::U8 => write!(f, "U8"),
+            ArchiveKind::Disc(format) => write!(f, "Disc ({})", format),
+        }
+    }
 }
 
 pub fn detect<R>(file: &mut R) -> io::Result<FileFormat>
@@ -146,97 +184,138 @@ where R: Read + Seek + ?Sized {
             let format = nod::Disc::detect(file)?;
             file.seek(SeekFrom::Start(0))?;
             match format {
-                Some(_) => Ok(FileFormat::Archive(ArchiveKind::Disc)),
+                Some(format) => Ok(FileFormat::Archive(ArchiveKind::Disc(format))),
                 None => Ok(FileFormat::Regular),
             }
         }
     }
 }
 
-pub fn open_path(path: &Path, auto_decompress: bool) -> anyhow::Result<Box<dyn VfsFile>> {
+pub enum OpenResult<'a> {
-    open_path_fs(Box::new(StdFs), path, auto_decompress)
+    File(Box<dyn VfsFile>, &'a str),
+    Directory(Box<dyn Vfs>, &'a str),
 }
 
-pub fn open_path_fs(
+pub fn open_path(path: &Path, auto_decompress: bool) -> anyhow::Result<OpenResult> {
+    open_path_with_fs(Box::new(StdFs), path, auto_decompress)
+}
+
+pub fn open_path_with_fs(
     mut fs: Box<dyn Vfs>,
     path: &Path,
     auto_decompress: bool,
-) -> anyhow::Result<Box<dyn VfsFile>> {
+) -> anyhow::Result<OpenResult> {
     let str = path.to_str().ok_or_else(|| anyhow!("Path is not valid UTF-8"))?;
     let mut split = str.split(':').peekable();
-    let mut within = String::new();
+    let mut current_path = String::new();
+    let mut file: Option<Box<dyn VfsFile>> = None;
+    let mut segment = "";
     loop {
-        let path = split.next().unwrap();
+        // Open the next segment if necessary
-        let mut file = fs
+        if file.is_none() {
-            .open(path)
+            segment = split.next().unwrap();
-            .with_context(|| format!("Failed to open {}", format_path(path, &within)))?;
+            if !current_path.is_empty() {
-        match detect(file.as_mut()).with_context(|| {
+                current_path.push(':');
-            format!("Failed to detect file type for {}", format_path(path, &within))
+            }
-        })? {
+            current_path.push_str(segment);
-            FileFormat::Regular => {
+            let file_type = match fs.metadata(segment) {
-                return match split.next() {
+                Ok(metadata) => metadata.file_type,
-                    None => Ok(file),
+                Err(VfsError::NotFound) => return Err(anyhow!("{} not found", current_path)),
-                    Some(segment) => {
+                Err(e) => return Err(e).context(format!("Failed to open {}", current_path)),
-                        if split.next().is_some() {
+            };
-                            return Err(anyhow!(
+            match file_type {
-                                "{} is not an archive",
+                VfsFileType::File => {
-                                format_path(path, &within)
+                    file = Some(
-                            ));
+                        fs.open(segment)
-                        }
+                            .with_context(|| format!("Failed to open {}", current_path))?,
-                        match segment {
+                    );
-                            "nlzss" => Ok(decompress_file(file, CompressionKind::Nlzss)
-                                .with_context(|| {
-                                    format!(
-                                        "Failed to decompress {} with NLZSS",
-                                        format_path(path, &within)
-                                    )
-                                })?),
-                            "yay0" => Ok(decompress_file(file, CompressionKind::Yay0)
-                                .with_context(|| {
-                                    format!(
-                                        "Failed to decompress {} with Yay0",
-                                        format_path(path, &within)
-                                    )
-                                })?),
-                            "yaz0" => Ok(decompress_file(file, CompressionKind::Yaz0)
-                                .with_context(|| {
-                                    format!(
-                                        "Failed to decompress {} with Yaz0",
-                                        format_path(path, &within)
-                                    )
-                                })?),
-                            _ => Err(anyhow!("{} is not an archive", format_path(path, &within))),
-                        }
-                    }
                 }
-            }
+                VfsFileType::Directory => {
-            FileFormat::Compressed(kind) => {
+                    return if split.peek().is_some() {
-                return if split.peek().is_none() {
+                        Err(anyhow!("{} is not a file", current_path))
-                    if auto_decompress {
-                        Ok(decompress_file(file, kind).with_context(|| {
-                            format!("Failed to decompress {}", format_path(path, &within))
-                        })?)
                     } else {
-                        Ok(file)
+                        Ok(OpenResult::Directory(fs, segment))
                     }
-                } else {
-                    Err(anyhow!("{} is not an archive", format_path(path, &within)))
-                };
-            }
-            FileFormat::Archive(kind) => {
-                if split.peek().is_none() {
-                    return Ok(file);
-                } else {
-                    fs = open_fs(file, kind).with_context(|| {
-                        format!("Failed to open container {}", format_path(path, &within))
-                    })?;
-                    if !within.is_empty() {
-                        within.push(':');
-                    }
-                    within.push_str(path);
                 }
             }
         }
+        let mut current_file = file.take().unwrap();
+        let format = detect(current_file.as_mut())
+            .with_context(|| format!("Failed to detect file type for {}", current_path))?;
+        if let Some(&next) = split.peek() {
+            match next {
+                "nlzss" => {
+                    split.next();
+                    file = Some(
+                        decompress_file(current_file.as_mut(), CompressionKind::Nlzss)
+                            .with_context(|| {
+                                format!("Failed to decompress {} with NLZSS", current_path)
+                            })?,
+                    );
+                }
+                "yay0" => {
+                    split.next();
+                    file = Some(
+                        decompress_file(current_file.as_mut(), CompressionKind::Yay0)
+                            .with_context(|| {
+                                format!("Failed to decompress {} with Yay0", current_path)
+                            })?,
+                    );
+                }
+                "yaz0" => {
+                    split.next();
+                    file = Some(
+                        decompress_file(current_file.as_mut(), CompressionKind::Yaz0)
+                            .with_context(|| {
+                                format!("Failed to decompress {} with Yaz0", current_path)
+                            })?,
+                    );
+                }
+                _ => match format {
+                    FileFormat::Regular => {
+                        return Err(anyhow!("{} is not an archive", current_path))
+                    }
+                    FileFormat::Compressed(kind) => {
+                        file =
+                            Some(decompress_file(current_file.as_mut(), kind).with_context(
+                                || format!("Failed to decompress {}", current_path),
+                            )?);
+                        // Continue the loop to detect the new format
+                    }
+                    FileFormat::Archive(kind) => {
+                        fs = open_fs(current_file, kind).with_context(|| {
+                            format!("Failed to open container {}", current_path)
+                        })?;
+                        // Continue the loop to open the next segment
+                    }
+                },
+            }
+        } else {
+            // No more segments, return as-is
+            return match format {
+                FileFormat::Compressed(kind) if auto_decompress => Ok(OpenResult::File(
+                    decompress_file(current_file.as_mut(), kind)
+                        .with_context(|| format!("Failed to decompress {}", current_path))?,
+                    segment,
+                )),
+                _ => Ok(OpenResult::File(current_file, segment)),
+            };
+        }
+    }
+}
+
+pub fn open_file(path: &Path, auto_decompress: bool) -> anyhow::Result<Box<dyn VfsFile>> {
+    open_file_with_fs(Box::new(StdFs), path, auto_decompress)
+}
+
+pub fn open_file_with_fs(
+    fs: Box<dyn Vfs>,
+    path: &Path,
+    auto_decompress: bool,
+) -> anyhow::Result<Box<dyn VfsFile>> {
+    match open_path_with_fs(fs, path, auto_decompress)? {
+        OpenResult::File(file, _) => Ok(file),
+        OpenResult::Directory(_, _) => Err(VfsError::IsADirectory.into()),
     }
 }
 
@@ -245,7 +324,7 @@ pub fn open_fs(mut file: Box<dyn VfsFile>, kind: ArchiveKind) -> io::Result<Box<
     match kind {
         ArchiveKind::Rarc => Ok(Box::new(RarcFs::new(file)?)),
         ArchiveKind::U8 => Ok(Box::new(U8Fs::new(file)?)),
-        ArchiveKind::Disc => {
+        ArchiveKind::Disc(_) => {
             let disc = nod::Disc::new_stream(file.into_disc_stream()).map_err(nod_to_io_error)?;
             let partition =
                 disc.open_partition_kind(nod::PartitionKind::Data).map_err(nod_to_io_error)?;
@@ -255,35 +334,37 @@ pub fn open_fs(mut file: Box<dyn VfsFile>, kind: ArchiveKind) -> io::Result<Box<
 }
 
 pub fn decompress_file(
-    mut file: Box<dyn VfsFile>,
+    file: &mut dyn VfsFile,
     kind: CompressionKind,
 ) -> io::Result<Box<dyn VfsFile>> {
     let metadata = file.metadata()?;
+    let data = file.map()?;
     match kind {
         CompressionKind::Yay0 => {
-            let data = file.map()?;
             let result = orthrus_ncompress::yay0::Yay0::decompress_from(data)
                 .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e.to_string()))?;
             Ok(Box::new(StaticFile::new(Arc::from(result), metadata.mtime)))
         }
         CompressionKind::Yaz0 => {
-            let data = file.map()?;
             let result = orthrus_ncompress::yaz0::Yaz0::decompress_from(data)
                 .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e.to_string()))?;
             Ok(Box::new(StaticFile::new(Arc::from(result), metadata.mtime)))
         }
         CompressionKind::Nlzss => {
-            let result = nintendo_lz::decompress(&mut file)
+            let result = nintendo_lz::decompress_arr(data)
                 .map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e.to_string()))?;
             Ok(Box::new(StaticFile::new(Arc::from(result.as_slice()), metadata.mtime)))
         }
     }
 }
 
-fn format_path(path: &str, within: &str) -> String {
+#[inline]
-    if within.is_empty() {
+pub fn next_non_empty<'a>(iter: &mut impl Iterator<Item = &'a str>) -> &'a str {
-        format!("'{}'", path)
+    loop {
-    } else {
+        match iter.next() {
-        format!("'{}' (within '{}')", path, within)
+            Some("") => continue,
+            Some(next) => break next,
+            None => break "",
+        }
     }
 }

src/vfs/rarc.rs

@@ -29,7 +29,7 @@ impl Vfs for RarcFs {
                 let file = WindowedFile::new(self.file.clone(), offset, len)?;
                 Ok(Box::new(file))
             }
-            Some(RarcNodeKind::Directory(_, _)) => Err(VfsError::DirectoryExists),
+            Some(RarcNodeKind::Directory(_, _)) => Err(VfsError::IsADirectory),
             None => Err(VfsError::NotFound),
         }
     }
@@ -53,7 +53,7 @@ impl Vfs for RarcFs {
                 }
                 Ok(entries)
             }
-            Some(RarcNodeKind::File(_, _)) => Err(VfsError::FileExists),
+            Some(RarcNodeKind::File(_, _)) => Err(VfsError::NotADirectory),
             None => Err(VfsError::NotFound),
         }
     }

src/vfs/u8_arc.rs

@@ -28,7 +28,7 @@ impl Vfs for U8Fs {
                     let file = WindowedFile::new(self.file.clone(), offset, len)?;
                     Ok(Box::new(file))
                 }
-                U8NodeKind::Directory => Err(VfsError::DirectoryExists),
+                U8NodeKind::Directory => Err(VfsError::IsADirectory),
                 U8NodeKind::Invalid => Err(VfsError::from("U8: Invalid node kind")),
             },
             None => Err(VfsError::NotFound),
@@ -44,7 +44,7 @@ impl Vfs for U8Fs {
         let view = self.view()?;
         match view.find(path) {
             Some((idx, node)) => match node.kind() {
-                U8NodeKind::File => Err(VfsError::FileExists),
+                U8NodeKind::File => Err(VfsError::NotADirectory),
                 U8NodeKind::Directory => {
                     let mut entries = Vec::new();
                     let mut idx = idx + 1;