Use std for dir reads, impl cd, and print errors right

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "anstream"
@@ -51,44 +51,11 @@ dependencies = [
  "windows-sys",
 ]
 
-[[package]]
-name = "atomic-polyfill"
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- "critical-section",
-]
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-
 [[package]]
 name = "clap"
-version = "4.5.18"
+version = "4.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0956a43b323ac1afaffc053ed5c4b7c1f1800bacd1683c353aabbb752515dd3"
+checksum = "7be5744db7978a28d9df86a214130d106a89ce49644cbc4e3f0c22c3fba30615"
 dependencies = [
  "clap_builder",
  "clap_derive",
@@ -96,9 +63,9 @@ dependencies = [
 
 [[package]]
 name = "clap_builder"
-version = "4.5.18"
+version = "4.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d72166dd41634086d5803a47eb71ae740e61d84709c36f3c34110173db3961b"
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 dependencies = [
  "anstream",
  "anstyle",
@@ -124,67 +91,12 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1462739cb27611015575c0c11df5df7601141071f07518d56fcc1be504cbec97"
 
-[[package]]
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-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
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 checksum = "d3fd119d74b830634cea2a0f58bbd0d54540518a14397557951e79340abc28c0"
 
-[[package]]
-name = "critical-section"
-version = "1.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f64009896348fc5af4222e9cf7d7d82a95a256c634ebcf61c53e4ea461422242"
-
-[[package]]
-name = "dir_rpc"
-version = "0.1.0"
-dependencies = [
- "parking_lot",
- "postcard",
-]
-
-[[package]]
-name = "embedded-io"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef1a6892d9eef45c8fa6b9e0086428a2cca8491aca8f787c534a3d6d0bcb3ced"
-
-[[package]]
-name = "embedded-io"
-version = "0.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "edd0f118536f44f5ccd48bcb8b111bdc3de888b58c74639dfb034a357d0f206d"
-
-[[package]]
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0c35f58762feb77d74ebe43bdbc3210f09be9fe6742234d573bacc26ed92b67"
-dependencies = [
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-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdc6457c0eb62c71aac4bc17216026d8410337c4126773b9c5daba343f17964f"
-dependencies = [
- "atomic-polyfill",
- "hash32",
- "rustc_version",
- "serde",
- "spin",
- "stable_deref_trait",
-]
-
 [[package]]
 name = "heck"
 version = "0.5.0"
@@ -197,58 +109,6 @@ version = "1.70.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
 
-[[package]]
-name = "libc"
-version = "0.2.159"
-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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- "autocfg",
- "scopeguard",
-]
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
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-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-targets",
-]
-
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- "cobs",
- "embedded-io 0.4.0",
- "embedded-io 0.6.1",
- "heapless",
- "serde",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.86"
@@ -263,9 +123,7 @@ name = "pts_tester"
 version = "0.1.0"
 dependencies = [
  "clap",
- "dir_rpc",
  "shlex",
- "vfs_rpc",
 ]
 
 [[package]]
@@ -277,83 +135,12 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.5.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "355ae415ccd3a04315d3f8246e86d67689ea74d88d915576e1589a351062a13b"
-dependencies = [
- "bitflags",
-]
-
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-dependencies = [
- "semver",
-]
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
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-
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- "serde_derive",
-]
-
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-dependencies = [
- "proc-macro2",
- "quote",
- "syn",
-]
-
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 checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
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-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-dependencies = [
- "lock_api",
-]
-
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-source = "registry+https://github.com/rust-lang/crates.io-index"
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-
 [[package]]
 name = "strsim"
 version = "0.11.1"
@@ -362,9 +149,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.77"
+version = "2.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9f35bcdf61fd8e7be6caf75f429fdca8beb3ed76584befb503b1569faee373ed"
+checksum = "89132cd0bf050864e1d38dc3bbc07a0eb8e7530af26344d3d2bbbef83499f590"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -383,15 +170,6 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
 
-[[package]]
-name = "vfs_rpc"
-version = "0.1.0"
-dependencies = [
- "parking_lot",
- "postcard",
- "serde",
-]
-
 [[package]]
 name = "windows-sys"
 version = "0.52.0"
@@ -464,3 +242,11 @@ name = "windows_x86_64_msvc"
 version = "0.52.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
+
+[[patch.unused]]
+name = "serde"
+version = "1.0.210"
+
+[[patch.unused]]
+name = "serde_derive"
+version = "1.0.210"

Cargo.toml

@@ -5,6 +5,8 @@ edition = "2021"
 
 [dependencies]
 clap = { version = "4.5.18", features = ["derive"] }
-dir_rpc = { version = "0.1.0", path = "../dir_rpc" }
 shlex = "1.3.0"
-vfs_rpc = { version = "0.1.0", path = "../vfs/vfs_rpc" }
+
+[patch.crates-io]
+serde = { path = "../serde/serde" }
+serde_derive = { path = "../serde/serde_derive" }

src/main.rs

@@ -1,7 +1,6 @@
 use std::{
     io::{self, Write},
-    os::mikros::syscalls,
+    path::{Component, Path, PathBuf},
-    path::{Path, PathBuf},
 };
 
 use clap::Parser;
@@ -16,17 +15,31 @@ struct Cat {
     path: PathBuf,
 }
 
-fn main() {
+#[derive(Parser, Debug)]
-    let vfs_pid = loop {
+struct Cd {
-        if let Some(pid) = syscalls::try_get_registered(0) {
+    path: PathBuf,
-            break pid;
 }
-    };
-    let vfs_client = vfs_rpc::Client::new(vfs_pid);
 
+fn canonicalize_path(path: &Path) -> PathBuf {
+    path.components()
+        .fold(PathBuf::from("/"), |mut buf, component| match component {
+            Component::Prefix(_) => unreachable!(),
+            Component::RootDir | Component::Normal(_) => {
+                buf.push(component);
+                buf
+            }
+            Component::CurDir => buf,
+            Component::ParentDir => {
+                buf.pop();
+                buf
+            }
+        })
+}
+
+fn main() {
     let mut line = String::new();
 
-    let cwd = Path::new("/").to_owned();
+    let mut cwd = Path::new("/").to_owned();
 
     loop {
         print!(
@@ -62,17 +75,20 @@ fn main() {
                 let abs_path = if cmd_path.is_relative() {
                     let mut abs_path = cwd.clone();
                     abs_path.push(cmd_path.clone());
-                    abs_path
+                    canonicalize_path(&abs_path)
                 } else {
                     cmd_path.clone()
                 };
-                let Ok((fs_pid, dir_fd)) = vfs_client.open_dir(&abs_path) else {
+                let dir = match std::fs::read_dir(&abs_path) {
-                    println!("ls: {}: failed to open", cmd_path.display());
+                    Ok(val) => val,
+                    Err(e) => {
+                        println!("ls: {}: {}", cmd_path.display(), e);
                         continue;
+                    }
                 };
-                let fs_client = dir_rpc::Client::new(fs_pid);
+                for entry in dir {
-                while let Some(entry) = fs_client.next_entry(dir_fd).unwrap() {
+                    let entry = entry.unwrap();
-                    println!("{}", entry);
+                    println!("{}", entry.file_name().to_string_lossy());
                 }
             }
             "cat" => {
@@ -86,13 +102,16 @@ fn main() {
                 let abs_path = if cmd.path.is_relative() {
                     let mut abs_path = cwd.clone();
                     abs_path.push(cmd.path.clone());
-                    abs_path
+                    canonicalize_path(&abs_path)
                 } else {
                     cmd.path.clone()
                 };
-                let Ok(contents) = std::fs::read(&abs_path) else {
+                let contents = match std::fs::read(&abs_path) {
-                    println!("cat: {}: failed to read", cmd.path.display());
+                    Ok(val) => val,
+                    Err(e) => {
+                        println!("cat: {}: {}", cmd.path.display(), e);
                         continue;
+                    }
                 };
                 io::stdout().lock().write_all(&contents).unwrap();
                 if let Some(&last_byte) = contents.last() {
@@ -101,6 +120,32 @@ fn main() {
                     }
                 }
             }
+            "cd" => {
+                let cmd = match Cd::try_parse_from(&cmd) {
+                    Ok(cmd) => cmd,
+                    Err(err) => {
+                        err.print().unwrap();
+                        continue;
+                    }
+                };
+                let abs_path = if cmd.path.is_relative() {
+                    let mut abs_path = cwd.clone();
+                    abs_path.push(cmd.path.clone());
+                    canonicalize_path(&abs_path)
+                } else {
+                    cmd.path.clone()
+                };
+                // Try to open the given directory, if it fails it's not a valid directory.
+                // Use Metadata instead once it's implemented.
+                match std::fs::read_dir(&abs_path) {
+                    Ok(_) => (),
+                    Err(e) => {
+                        println!("cd: {}: {}", cmd.path.display(), e);
+                        continue;
+                    }
+                };
+                cwd = abs_path;
+            }
             "exit" => {
                 break;
             }