refactor(ext/fs): abstract FS via FileSystem trait (#18599)

This commit abstracts out the specifics of the underlying system calls
FS operations behind a new `FileSystem` and `File` trait in the
`ext/fs` extension.

This allows other embedders to re-use ext/fs, but substituting in a
different FS backend.

This is likely not the final form of these traits. Eventually they will
be entirely `deno_core::Resource` agnostic, and will live in a seperate
crate.

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 88 insertions, 2396 deletions

diff --git a/ext/fs/lib.rs b/ext/fs/lib.rs
index c00f39599..c1418815c 100644
--- a/ext/fs/lib.rs
+++ b/ext/fs/lib.rs
@@ -1,74 +1,26 @@
 // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
-// Some deserializer fields are only used on Unix and Windows build fails without it
 
-use deno_core::error::custom_error;
-use deno_core::error::type_error;
-use deno_core::error::AnyError;
-use deno_core::op;
-use deno_core::CancelFuture;
-use deno_core::CancelHandle;
+mod interface;
+mod ops;
+mod std_fs;
+
+pub use crate::interface::File;
+pub use crate::interface::FileSystem;
+pub use crate::interface::FsDirEntry;
+pub use crate::interface::FsError;
+pub use crate::interface::FsFileType;
+pub use crate::interface::FsPermissions;
+pub use crate::interface::FsResult;
+pub use crate::interface::FsStat;
+pub use crate::interface::OpenOptions;
+use crate::ops::*;
+
+pub use crate::std_fs::StdFs;
+
 use deno_core::OpState;
-use deno_core::ResourceId;
-use deno_core::ZeroCopyBuf;
-use deno_crypto::rand::thread_rng;
-use deno_crypto::rand::Rng;
-use deno_io::StdFileResource;
-use log::debug;
-use serde::Deserialize;
-use serde::Serialize;
-use std::borrow::Cow;
 use std::cell::RefCell;
 use std::convert::From;
-use std::env::current_dir;
-use std::env::set_current_dir;
-use std::env::temp_dir;
-use std::io;
-use std::io::Error;
-use std::io::Seek;
-use std::io::SeekFrom;
-use std::io::Write;
-use std::path::Path;
-use std::path::PathBuf;
 use std::rc::Rc;
-use std::time::SystemTime;
-use std::time::UNIX_EPOCH;
-
-/// Similar to `std::fs::canonicalize()` but strips UNC prefixes on Windows.
-fn canonicalize_path(path: &Path) -> Result<PathBuf, Error> {
-  let mut canonicalized_path = path.canonicalize()?;
-  if cfg!(windows) {
-    canonicalized_path = PathBuf::from(
-      canonicalized_path
-        .display()
-        .to_string()
-        .trim_start_matches("\\\\?\\"),
-    );
-  }
-  Ok(canonicalized_path)
-}
-
-/// A utility function to map OsStrings to Strings
-fn into_string(s: std::ffi::OsString) -> Result<String, AnyError> {
-  s.into_string().map_err(|s| {
-    let message = format!("File name or path {s:?} is not valid UTF-8");
-    custom_error("InvalidData", message)
-  })
-}
-
-#[cfg(unix)]
-pub fn get_nix_error_class(error: &nix::Error) -> &'static str {
-  match error {
-    nix::Error::ECHILD => "NotFound",
-    nix::Error::EINVAL => "TypeError",
-    nix::Error::ENOENT => "NotFound",
-    nix::Error::ENOTTY => "BadResource",
-    nix::Error::EPERM => "PermissionDenied",
-    nix::Error::ESRCH => "NotFound",
-    nix::Error::UnknownErrno => "Error",
-    &nix::Error::ENOTSUP => unreachable!(),
-    _ => "Error",
-  }
-}
 
 struct UnstableChecker {
   pub unstable: bool,
@@ -87,2352 +39,92 @@ impl UnstableChecker {
 }
 
 /// Helper for checking unstable features. Used for sync ops.
-fn check_unstable(state: &OpState, api_name: &str) {
+pub(crate) fn check_unstable(state: &OpState, api_name: &str) {
   state.borrow::<UnstableChecker>().check_unstable(api_name)
 }
 
 /// Helper for checking unstable features. Used for async ops.
-fn check_unstable2(state: &Rc<RefCell<OpState>>, api_name: &str) {
+pub(crate) fn check_unstable2(state: &Rc<RefCell<OpState>>, api_name: &str) {
   let state = state.borrow();
   state.borrow::<UnstableChecker>().check_unstable(api_name)
 }
 
-pub trait FsPermissions {
-  fn check_read(&mut self, p: &Path, api_name: &str) -> Result<(), AnyError>;
-  fn check_read_all(&mut self, api_name: &str) -> Result<(), AnyError>;
-  fn check_read_blind(
-    &mut self,
-    p: &Path,
-    display: &str,
-    api_name: &str,
-  ) -> Result<(), AnyError>;
-  fn check_write(&mut self, p: &Path, api_name: &str) -> Result<(), AnyError>;
-  fn check_write_all(&mut self, api_name: &str) -> Result<(), AnyError>;
-}
-
-#[cfg(not(unix))]
-use deno_core::error::generic_error;
-#[cfg(not(unix))]
-use deno_core::error::not_supported;
-
 deno_core::extension!(deno_fs,
-  deps = [ deno_web, deno_io ],
-  parameters = [P: FsPermissions],
+  deps = [ deno_web ],
+  parameters = [Fs: FileSystem, P: FsPermissions],
   ops = [
-    op_open_sync<P>,
-    op_open_async<P>,
-    op_write_file_sync<P>,
-    op_write_file_async<P>,
-    op_seek_sync,
-    op_seek_async,
-    op_fdatasync_sync,
-    op_fdatasync_async,
-    op_fsync_sync,
-    op_fsync_async,
-    op_fstat_sync,
-    op_fstat_async,
-    op_flock_sync,
-    op_flock_async,
-    op_funlock_sync,
-    op_funlock_async,
-    op_umask,
-    op_chdir<P>,
-    op_mkdir_sync<P>,
-    op_mkdir_async<P>,
-    op_chmod_sync<P>,
-    op_chmod_async<P>,
-    op_chown_sync<P>,
-    op_chown_async<P>,
-    op_remove_sync<P>,
-    op_remove_async<P>,
-    op_copy_file_sync<P>,
-    op_copy_file_async<P>,
-    op_stat_sync<P>,
-    op_stat_async<P>,
-    op_realpath_sync<P>,
-    op_realpath_async<P>,
-    op_read_dir_sync<P>,
-    op_read_dir_async<P>,
-    op_rename_sync<P>,
-    op_rename_async<P>,
-    op_link_sync<P>,
-    op_link_async<P>,
-    op_symlink_sync<P>,
-    op_symlink_async<P>,
-    op_read_link_sync<P>,
-    op_read_link_async<P>,
-    op_ftruncate_sync,
-    op_ftruncate_async,
-    op_truncate_sync<P>,
-    op_truncate_async<P>,
-    op_make_temp_dir_sync<P>,
-    op_make_temp_dir_async<P>,
-    op_make_temp_file_sync<P>,
-    op_make_temp_file_async<P>,
-    op_cwd<P>,
-    op_futime_sync,
-    op_futime_async,
-    op_utime_sync<P>,
-    op_utime_async<P>,
-    op_readfile_sync<P>,
-    op_readfile_text_sync<P>,
-    op_readfile_async<P>,
-    op_readfile_text_async<P>,
+    op_cwd<Fs, P>,
+    op_umask<Fs>,
+    op_chdir<Fs, P>,
+
+    op_open_sync<Fs, P>,
+    op_open_async<Fs, P>,
+    op_mkdir_sync<Fs, P>,
+    op_mkdir_async<Fs, P>,
+    op_chmod_sync<Fs, P>,
+    op_chmod_async<Fs, P>,
+    op_chown_sync<Fs, P>,
+    op_chown_async<Fs, P>,
+    op_remove_sync<Fs, P>,
+    op_remove_async<Fs, P>,
+    op_copy_file_sync<Fs, P>,
+    op_copy_file_async<Fs, P>,
+    op_stat_sync<Fs, P>,
+    op_stat_async<Fs, P>,
+    op_lstat_sync<Fs, P>,
+    op_lstat_async<Fs, P>,
+    op_realpath_sync<Fs, P>,
+    op_realpath_async<Fs, P>,
+    op_read_dir_sync<Fs, P>,
+    op_read_dir_async<Fs, P>,
+    op_rename_sync<Fs, P>,
+    op_rename_async<Fs, P>,
+    op_link_sync<Fs, P>,
+    op_link_async<Fs, P>,
+    op_symlink_sync<Fs, P>,
+    op_symlink_async<Fs, P>,
+    op_read_link_sync<Fs, P>,
+    op_read_link_async<Fs, P>,
+    op_truncate_sync<Fs, P>,
+    op_truncate_async<Fs, P>,
+    op_utime_sync<Fs, P>,
+    op_utime_async<Fs, P>,
+    op_make_temp_dir_sync<Fs, P>,
+    op_make_temp_dir_async<Fs, P>,
+    op_make_temp_file_sync<Fs, P>,
+    op_make_temp_file_async<Fs, P>,
+    op_write_file_sync<Fs, P>,
+    op_write_file_async<Fs, P>,
+    op_read_file_sync<Fs, P>,
+    op_read_file_async<Fs, P>,
+    op_read_file_text_sync<Fs, P>,
+    op_read_file_text_async<Fs, P>,
+
+    op_seek_sync<Fs>,
+    op_seek_async<Fs>,
+    op_fdatasync_sync<Fs>,
+    op_fdatasync_async<Fs>,
+    op_fsync_sync<Fs>,
+    op_fsync_async<Fs>,
+    op_fstat_sync<Fs>,
+    op_fstat_async<Fs>,
+    op_flock_sync<Fs>,
+    op_flock_async<Fs>,
+    op_funlock_sync<Fs>,
+    op_funlock_async<Fs>,
+    op_ftruncate_sync<Fs>,
+    op_ftruncate_async<Fs>,
+    op_futime_sync<Fs>,
+    op_futime_async<Fs>,
+
   ],
   esm = [ "30_fs.js" ],
   options = {
-    unstable: bool
+    unstable: bool,
+    fs: Fs,
   },
   state = |state, options| {
     state.put(UnstableChecker { unstable: options.unstable });
+    state.put(options.fs);
   },
 );
-
-fn default_err_mapper(err: Error, desc: String) -> AnyError {
-  AnyError::new(Error::new(err.kind(), desc)).context(err)
-}
-
-#[derive(Deserialize, Default, Debug)]
-#[serde(rename_all = "camelCase")]
-#[serde(default)]
-pub struct OpenOptions {
-  read: bool,
-  write: bool,
-  create: bool,
-  truncate: bool,
-  append: bool,
-  create_new: bool,
-}
-
-#[inline]
-fn open_helper<P>(
-  state: &mut OpState,
-  path: &str,
-  mode: Option<u32>,
-  options: Option<&OpenOptions>,
-  api_name: &str,
-) -> Result<(PathBuf, std::fs::OpenOptions), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(path).to_path_buf();
-
-  let mut open_options = std::fs::OpenOptions::new();
-
-  if let Some(mode) = mode {
-    // mode only used if creating the file on Unix
-    // if not specified, defaults to 0o666
-    #[cfg(unix)]
-    {
-      use std::os::unix::fs::OpenOptionsExt;
-      open_options.mode(mode & 0o777);
-    }
-    #[cfg(not(unix))]
-    let _ = mode; // avoid unused warning
-  }
-
-  let permissions = state.borrow_mut::<P>();
-
-  match options {
-    None => {
-      permissions.check_read(&path, api_name)?;
-      open_options
-        .read(true)
-        .create(false)
-        .write(false)
-        .truncate(false)
-        .append(false)
-        .create_new(false);
-    }
-    Some(options) => {
-      if options.read {
-        permissions.check_read(&path, api_name)?;
-      }
-
-      if options.write || options.append {
-        permissions.check_write(&path, api_name)?;
-      }
-
-      open_options
-        .read(options.read)
-        .create(options.create)
-        .write(options.write)
-        .truncate(options.truncate)
-        .append(options.append)
-        .create_new(options.create_new);
-    }
-  }
-
-  Ok((path, open_options))
-}
-
-#[op]
-fn op_open_sync<P>(
-  state: &mut OpState,
-  path: String,
-  options: Option<OpenOptions>,
-  mode: Option<u32>,
-) -> Result<ResourceId, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let (path, open_options) =
-    open_helper::<P>(state, &path, mode, options.as_ref(), "Deno.openSync()")?;
-  let std_file = open_options.open(&path).map_err(|err| {
-    default_err_mapper(err, format!("open '{}'", path.display()))
-  })?;
-  let resource = StdFileResource::fs_file(std_file);
-  let rid = state.resource_table.add(resource);
-  Ok(rid)
-}
-
-#[op]
-async fn op_open_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  options: Option<OpenOptions>,
-  mode: Option<u32>,
-) -> Result<ResourceId, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let (path, open_options) = open_helper::<P>(
-    &mut state.borrow_mut(),
-    &path,
-    mode,
-    options.as_ref(),
-    "Deno.open()",
-  )?;
-  let std_file = tokio::task::spawn_blocking(move || {
-    open_options.open(&path).map_err(|err| {
-      default_err_mapper(err, format!("open '{}'", path.display()))
-    })
-  })
-  .await?;
-  let resource = StdFileResource::fs_file(std_file?);
-  let rid = state.borrow_mut().resource_table.add(resource);
-  Ok(rid)
-}
-
-#[inline]
-fn write_open_options(
-  create: bool,
-  append: bool,
-  create_new: bool,
-) -> OpenOptions {
-  OpenOptions {
-    read: false,
-    write: true,
-    create,
-    truncate: !append,
-    append,
-    create_new,
-  }
-}
-
-#[op]
-fn op_write_file_sync<P>(
-  state: &mut OpState,
-  path: String,
-  mode: Option<u32>,
-  append: bool,
-  create: bool,
-  create_new: bool,
-  data: ZeroCopyBuf,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let (path, open_options) = open_helper::<P>(
-    state,
-    &path,
-    mode,
-    Some(&write_open_options(create, append, create_new)),
-    "Deno.writeFileSync()",
-  )?;
-  write_file(&path, open_options, mode, data)
-}
-
-#[op]
-async fn op_write_file_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  mode: Option<u32>,
-  append: bool,
-  create: bool,
-  create_new: bool,
-  data: ZeroCopyBuf,
-  cancel_rid: Option<ResourceId>,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let (path, open_options) = open_helper::<P>(
-    &mut state.borrow_mut(),
-    &path,
-    mode,
-    Some(&write_open_options(create, append, create_new)),
-    "Deno.writeFile()",
-  )?;
-
-  let write_future = tokio::task::spawn_blocking(move || {
-    write_file(&path, open_options, mode, data)
-  });
-
-  let cancel_handle = cancel_rid.and_then(|rid| {
-    state
-      .borrow_mut()
-      .resource_table
-      .get::<CancelHandle>(rid)
-      .ok()
-  });
-
-  if let Some(cancel_handle) = cancel_handle {
-    let write_future_rv = write_future.or_cancel(cancel_handle).await;
-
-    if let Some(cancel_rid) = cancel_rid {
-      state.borrow_mut().resource_table.close(cancel_rid).ok();
-    };
-
-    return write_future_rv??;
-  }
-
-  write_future.await?
-}
-
-fn write_file(
-  path: &Path,
-  open_options: std::fs::OpenOptions,
-  _mode: Option<u32>,
-  data: ZeroCopyBuf,
-) -> Result<(), AnyError> {
-  let mut std_file = open_options.open(path).map_err(|err| {
-    default_err_mapper(err, format!("open '{}'", path.display()))
-  })?;
-
-  // need to chmod the file if it already exists and a mode is specified
-  #[cfg(unix)]
-  if let Some(mode) = _mode {
-    use std::os::unix::fs::PermissionsExt;
-    let permissions = PermissionsExt::from_mode(mode & 0o777);
-    std_file.set_permissions(permissions).map_err(|err| {
-      default_err_mapper(err, format!("chmod '{}'", path.display()))
-    })?;
-  }
-
-  std_file.write_all(&data)?;
-  Ok(())
-}
-
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct SeekArgs {
-  rid: ResourceId,
-  offset: i64,
-  whence: i32,
-}
-
-fn seek_helper(args: SeekArgs) -> Result<(u32, SeekFrom), AnyError> {
-  let rid = args.rid;
-  let offset = args.offset;
-  let whence = args.whence as u32;
-  // Translate seek mode to Rust repr.
-  let seek_from = match whence {
-    0 => SeekFrom::Start(offset as u64),
-    1 => SeekFrom::Current(offset),
-    2 => SeekFrom::End(offset),
-    _ => {
-      return Err(type_error(format!("Invalid seek mode: {whence}")));
-    }
-  };
-
-  Ok((rid, seek_from))
-}
-
-#[op]
-fn op_seek_sync(state: &mut OpState, args: SeekArgs) -> Result<u64, AnyError> {
-  let (rid, seek_from) = seek_helper(args)?;
-  StdFileResource::with_file(state, rid, |std_file| {
-    std_file.seek(seek_from).map_err(AnyError::from)
-  })
-}
-
-#[op]
-async fn op_seek_async(
-  state: Rc<RefCell<OpState>>,
-  args: SeekArgs,
-) -> Result<u64, AnyError> {
-  let (rid, seek_from) = seek_helper(args)?;
-
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    std_file.seek(seek_from).map_err(AnyError::from)
-  })
-  .await
-}
-
-#[op]
-fn op_fdatasync_sync(
-  state: &mut OpState,
-  rid: ResourceId,
-) -> Result<(), AnyError> {
-  StdFileResource::with_file(state, rid, |std_file| {
-    std_file.sync_data().map_err(AnyError::from)
-  })
-}
-
-#[op]
-async fn op_fdatasync_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-) -> Result<(), AnyError> {
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    std_file.sync_data().map_err(AnyError::from)
-  })
-  .await
-}
-
-#[op]
-fn op_fsync_sync(state: &mut OpState, rid: ResourceId) -> Result<(), AnyError> {
-  StdFileResource::with_file(state, rid, |std_file| {
-    std_file.sync_all().map_err(AnyError::from)
-  })
-}
-
-#[op]
-async fn op_fsync_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-) -> Result<(), AnyError> {
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    std_file.sync_all().map_err(AnyError::from)
-  })
-  .await
-}
-
-#[op]
-fn op_fstat_sync(
-  state: &mut OpState,
-  rid: ResourceId,
-  out_buf: &mut [u32],
-) -> Result<(), AnyError> {
-  let metadata = StdFileResource::with_file(state, rid, |std_file| {
-    std_file.metadata().map_err(AnyError::from)
-  })?;
-  let stat = get_stat(metadata);
-  stat.write(out_buf);
-  Ok(())
-}
-
-#[op]
-async fn op_fstat_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-) -> Result<FsStat, AnyError> {
-  let metadata =
-    StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-      std_file.metadata().map_err(AnyError::from)
-    })
-    .await?;
-  Ok(get_stat(metadata))
-}
-
-#[op]
-fn op_flock_sync(
-  state: &mut OpState,
-  rid: ResourceId,
-  exclusive: bool,
-) -> Result<(), AnyError> {
-  use fs3::FileExt;
-  check_unstable(state, "Deno.flockSync");
-
-  StdFileResource::with_file(state, rid, |std_file| {
-    if exclusive {
-      std_file.lock_exclusive()?;
-    } else {
-      std_file.lock_shared()?;
-    }
-    Ok(())
-  })
-}
-
-#[op]
-async fn op_flock_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-  exclusive: bool,
-) -> Result<(), AnyError> {
-  use fs3::FileExt;
-  check_unstable2(&state, "Deno.flock");
-
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    if exclusive {
-      std_file.lock_exclusive()?;
-    } else {
-      std_file.lock_shared()?;
-    }
-    Ok(())
-  })
-  .await
-}
-
-#[op]
-fn op_funlock_sync(
-  state: &mut OpState,
-  rid: ResourceId,
-) -> Result<(), AnyError> {
-  use fs3::FileExt;
-  check_unstable(state, "Deno.funlockSync");
-
-  StdFileResource::with_file(state, rid, |std_file| {
-    std_file.unlock()?;
-    Ok(())
-  })
-}
-
-#[op]
-async fn op_funlock_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-) -> Result<(), AnyError> {
-  use fs3::FileExt;
-  check_unstable2(&state, "Deno.funlock");
-
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    std_file.unlock()?;
-    Ok(())
-  })
-  .await
-}
-
-#[op]
-fn op_umask(state: &mut OpState, mask: Option<u32>) -> Result<u32, AnyError> {
-  check_unstable(state, "Deno.umask");
-  // TODO implement umask for Windows
-  // see https://github.com/nodejs/node/blob/master/src/node_process_methods.cc
-  // and https://docs.microsoft.com/fr-fr/cpp/c-runtime-library/reference/umask?view=vs-2019
-  #[cfg(not(unix))]
-  {
-    let _ = mask; // avoid unused warning.
-    Err(not_supported())
-  }
-  #[cfg(unix)]
-  {
-    use nix::sys::stat::mode_t;
-    use nix::sys::stat::umask;
-    use nix::sys::stat::Mode;
-    let r = if let Some(mask) = mask {
-      // If mask provided, return previous.
-      umask(Mode::from_bits_truncate(mask as mode_t))
-    } else {
-      // If no mask provided, we query the current. Requires two syscalls.
-      let prev = umask(Mode::from_bits_truncate(0o777));
-      let _ = umask(prev);
-      prev
-    };
-    #[cfg(target_os = "linux")]
-    {
-      Ok(r.bits())
-    }
-    #[cfg(target_os = "macos")]
-    {
-      Ok(r.bits() as u32)
-    }
-  }
-}
-
-#[op]
-fn op_chdir<P>(state: &mut OpState, directory: &str) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let d = PathBuf::from(&directory);
-  state.borrow_mut::<P>().check_read(&d, "Deno.chdir()")?;
-  set_current_dir(&d)
-    .map_err(|err| default_err_mapper(err, format!("chdir '{directory}'")))?;
-  Ok(())
-}
-
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct MkdirArgs {
-  path: String,
-  recursive: bool,
-  mode: Option<u32>,
-}
-
-#[op]
-fn op_mkdir_sync<P>(
-  state: &mut OpState,
-  args: MkdirArgs,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(&args.path).to_path_buf();
-  let mode = args.mode.unwrap_or(0o777) & 0o777;
-  state
-    .borrow_mut::<P>()
-    .check_write(&path, "Deno.mkdirSync()")?;
-  debug!("op_mkdir {} {:o} {}", path.display(), mode, args.recursive);
-  let mut builder = std::fs::DirBuilder::new();
-  builder.recursive(args.recursive);
-  #[cfg(unix)]
-  {
-    use std::os::unix::fs::DirBuilderExt;
-    builder.mode(mode);
-  }
-  builder.create(&path).map_err(|err| {
-    default_err_mapper(err, format!("mkdir '{}'", path.display()))
-  })?;
-  Ok(())
-}
-
-#[op]
-async fn op_mkdir_async<P>(
-  state: Rc<RefCell<OpState>>,
-  args: MkdirArgs,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(&args.path).to_path_buf();
-  let mode = args.mode.unwrap_or(0o777) & 0o777;
-
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_write(&path, "Deno.mkdir()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    debug!("op_mkdir {} {:o} {}", path.display(), mode, args.recursive);
-    let mut builder = std::fs::DirBuilder::new();
-    builder.recursive(args.recursive);
-    #[cfg(unix)]
-    {
-      use std::os::unix::fs::DirBuilderExt;
-      builder.mode(mode);
-    }
-    builder.create(&path).map_err(|err| {
-      default_err_mapper(err, format!("mkdir '{}'", path.display()))
-    })?;
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_chmod_sync<P>(
-  state: &mut OpState,
-  path: &str,
-  mode: u32,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(path);
-  let mode = mode & 0o777;
-
-  state
-    .borrow_mut::<P>()
-    .check_write(path, "Deno.chmodSync()")?;
-  raw_chmod(path, mode)
-}
-
-#[op]
-async fn op_chmod_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  mode: u32,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(&path).to_path_buf();
-  let mode = mode & 0o777;
-
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_write(&path, "Deno.chmod()")?;
-  }
-
-  tokio::task::spawn_blocking(move || raw_chmod(&path, mode))
-    .await
-    .unwrap()
-}
-
-fn raw_chmod(path: &Path, _raw_mode: u32) -> Result<(), AnyError> {
-  let err_mapper =
-    |err| default_err_mapper(err, format!("chmod '{}'", path.display()));
-  #[cfg(unix)]
-  {
-    use std::os::unix::fs::PermissionsExt;
-    let permissions = PermissionsExt::from_mode(_raw_mode);
-    std::fs::set_permissions(path, permissions).map_err(err_mapper)?;
-    Ok(())
-  }
-  // TODO Implement chmod for Windows (#4357)
-  #[cfg(not(unix))]
-  {
-    // Still check file/dir exists on Windows
-    let _metadata = std::fs::metadata(path).map_err(err_mapper)?;
-    Err(not_supported())
-  }
-}
-
-#[op]
-fn op_chown_sync<P>(
-  state: &mut OpState,
-  path: &str,
-  #[cfg_attr(windows, allow(unused_variables))] uid: Option<u32>,
-  #[cfg_attr(windows, allow(unused_variables))] gid: Option<u32>,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(path).to_path_buf();
-  state
-    .borrow_mut::<P>()
-    .check_write(&path, "Deno.chownSync()")?;
-  #[cfg(unix)]
-  {
-    use nix::unistd::chown;
-    use nix::unistd::Gid;
-    use nix::unistd::Uid;
-    let nix_uid = uid.map(Uid::from_raw);
-    let nix_gid = gid.map(Gid::from_raw);
-    chown(&path, nix_uid, nix_gid).map_err(|err| {
-      custom_error(
-        get_nix_error_class(&err),
-        format!("{}, chown '{}'", err.desc(), path.display()),
-      )
-    })?;
-    Ok(())
-  }
-  // TODO Implement chown for Windows
-  #[cfg(not(unix))]
-  {
-    Err(generic_error("Not implemented"))
-  }
-}
-
-#[op]
-async fn op_chown_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  #[cfg_attr(windows, allow(unused_variables))] uid: Option<u32>,
-  #[cfg_attr(windows, allow(unused_variables))] gid: Option<u32>,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(&path).to_path_buf();
-
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_write(&path, "Deno.chown()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    #[cfg(unix)]
-    {
-      use nix::unistd::chown;
-      use nix::unistd::Gid;
-      use nix::unistd::Uid;
-      let nix_uid = uid.map(Uid::from_raw);
-      let nix_gid = gid.map(Gid::from_raw);
-      chown(&path, nix_uid, nix_gid).map_err(|err| {
-        custom_error(
-          get_nix_error_class(&err),
-          format!("{}, chown '{}'", err.desc(), path.display()),
-        )
-      })?;
-      Ok(())
-    }
-    // TODO Implement chown for Windows
-    #[cfg(not(unix))]
-    Err(not_supported())
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_remove_sync<P>(
-  state: &mut OpState,
-  path: &str,
-  recursive: bool,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(path);
-
-  state
-    .borrow_mut::<P>()
-    .check_write(&path, "Deno.removeSync()")?;
-
-  #[cfg(not(unix))]
-  use std::os::windows::prelude::MetadataExt;
-
-  let err_mapper =
-    |err| default_err_mapper(err, format!("remove '{}'", path.display()));
-  let metadata = std::fs::symlink_metadata(&path).map_err(err_mapper)?;
-
-  let file_type = metadata.file_type();
-  if file_type.is_file() {
-    std::fs::remove_file(&path).map_err(err_mapper)?;
-  } else if recursive {
-    std::fs::remove_dir_all(&path).map_err(err_mapper)?;
-  } else if file_type.is_symlink() {
-    #[cfg(unix)]
-    std::fs::remove_file(&path).map_err(err_mapper)?;
-    #[cfg(not(unix))]
-    {
-      use winapi::um::winnt::FILE_ATTRIBUTE_DIRECTORY;
-      if metadata.file_attributes() & FILE_ATTRIBUTE_DIRECTORY != 0 {
-        std::fs::remove_dir(&path).map_err(err_mapper)?;
-      } else {
-        std::fs::remove_file(&path).map_err(err_mapper)?;
-      }
-    }
-  } else if file_type.is_dir() {
-    std::fs::remove_dir(&path).map_err(err_mapper)?;
-  } else {
-    // pipes, sockets, etc...
-    std::fs::remove_file(&path).map_err(err_mapper)?;
-  }
-  Ok(())
-}
-
-#[op]
-async fn op_remove_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  recursive: bool,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-
-  {
-    let mut state = state.borrow_mut();
-    state
-      .borrow_mut::<P>()
-      .check_write(&path, "Deno.remove()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    #[cfg(not(unix))]
-    use std::os::windows::prelude::MetadataExt;
-    let err_mapper =
-      |err| default_err_mapper(err, format!("remove '{}'", path.display()));
-    let metadata = std::fs::symlink_metadata(&path).map_err(err_mapper)?;
-
-    debug!("op_remove_async {} {}", path.display(), recursive);
-    let file_type = metadata.file_type();
-    if file_type.is_file() {
-      std::fs::remove_file(&path).map_err(err_mapper)?;
-    } else if recursive {
-      std::fs::remove_dir_all(&path).map_err(err_mapper)?;
-    } else if file_type.is_symlink() {
-      #[cfg(unix)]
-      std::fs::remove_file(&path).map_err(err_mapper)?;
-      #[cfg(not(unix))]
-      {
-        use winapi::um::winnt::FILE_ATTRIBUTE_DIRECTORY;
-        if metadata.file_attributes() & FILE_ATTRIBUTE_DIRECTORY != 0 {
-          std::fs::remove_dir(&path).map_err(err_mapper)?;
-        } else {
-          std::fs::remove_file(&path).map_err(err_mapper)?;
-        }
-      }
-    } else if file_type.is_dir() {
-      std::fs::remove_dir(&path).map_err(err_mapper)?;
-    } else {
-      // pipes, sockets, etc...
-      std::fs::remove_file(&path).map_err(err_mapper)?;
-    }
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_copy_file_sync<P>(
-  state: &mut OpState,
-  from: &str,
-  to: &str,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let from_path = PathBuf::from(from);
-  let to_path = PathBuf::from(to);
-
-  let permissions = state.borrow_mut::<P>();
-  permissions.check_read(&from_path, "Deno.copyFileSync()")?;
-  permissions.check_write(&to_path, "Deno.copyFileSync()")?;
-
-  // On *nix, Rust reports non-existent `from` as ErrorKind::InvalidInput
-  // See https://github.com/rust-lang/rust/issues/54800
-  // Once the issue is resolved, we should remove this workaround.
-  if cfg!(unix) && !from_path.is_file() {
-    return Err(custom_error(
-      "NotFound",
-      format!(
-        "File not found, copy '{}' -> '{}'",
-        from_path.display(),
-        to_path.display()
-      ),
-    ));
-  }
-
-  let err_mapper = |err| {
-    default_err_mapper(
-      err,
-      format!("copy '{}' -> '{}'", from_path.display(), to_path.display()),
-    )
-  };
-
-  #[cfg(target_os = "macos")]
-  {
-    use libc::clonefile;
-    use libc::stat;
-    use libc::unlink;
-    use std::ffi::CString;
-    use std::io::Read;
-    use std::os::unix::fs::OpenOptionsExt;
-    use std::os::unix::fs::PermissionsExt;
-
-    let from = CString::new(from).unwrap();
-    let to = CString::new(to).unwrap();
-
-    // SAFETY: `from` and `to` are valid C strings.
-    // std::fs::copy does open() + fcopyfile() on macOS. We try to use
-    // clonefile() instead, which is more efficient.
-    unsafe {
-      let mut st = std::mem::zeroed();
-      let ret = stat(from.as_ptr(), &mut st);
-      if ret != 0 {
-        return Err(err_mapper(Error::last_os_error()));
-      }
-
-      if st.st_size > 128 * 1024 {
-        // Try unlink. If it fails, we are going to try clonefile() anyway.
-        let _ = unlink(to.as_ptr());
-        // Matches rust stdlib behavior for io::copy.
-        // https://github.com/rust-lang/rust/blob/3fdd578d72a24d4efc2fe2ad18eec3b6ba72271e/library/std/src/sys/unix/fs.rs#L1613-L1616
-        if clonefile(from.as_ptr(), to.as_ptr(), 0) == 0 {
-          return Ok(());
-        }
-      } else {
-        // Do a regular copy. fcopyfile() is an overkill for < 128KB
-        // files.
-        let mut buf = [0u8; 128 * 1024];
-        let mut from_file =
-          std::fs::File::open(&from_path).map_err(err_mapper)?;
-        let perm = from_file.metadata().map_err(err_mapper)?.permissions();
-
-        let mut to_file = std::fs::OpenOptions::new()
-          // create the file with the correct mode right away
-          .mode(perm.mode())
-          .write(true)
-          .create(true)
-          .truncate(true)
-          .open(&to_path)
-          .map_err(err_mapper)?;
-        let writer_metadata = to_file.metadata()?;
-        if writer_metadata.is_file() {
-          // Set the correct file permissions, in case the file already existed.
-          // Don't set the permissions on already existing non-files like
-          // pipes/FIFOs or device nodes.
-          to_file.set_permissions(perm)?;
-        }
-        loop {
-          let nread = from_file.read(&mut buf).map_err(err_mapper)?;
-          if nread == 0 {
-            break;
-          }
-          to_file.write_all(&buf[..nread]).map_err(err_mapper)?;
-        }
-        return Ok(());
-      }
-    }
-
-    // clonefile() failed, fall back to std::fs::copy().
-  }
-
-  // returns size of from as u64 (we ignore)
-  std::fs::copy(&from_path, &to_path).map_err(err_mapper)?;
-  Ok(())
-}
-
-#[op]
-async fn op_copy_file_async<P>(
-  state: Rc<RefCell<OpState>>,
-  from: String,
-  to: String,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let from = PathBuf::from(&from);
-  let to = PathBuf::from(&to);
-
-  {
-    let mut state = state.borrow_mut();
-    let permissions = state.borrow_mut::<P>();
-    permissions.check_read(&from, "Deno.copyFile()")?;
-    permissions.check_write(&to, "Deno.copyFile()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    // On *nix, Rust reports non-existent `from` as ErrorKind::InvalidInput
-    // See https://github.com/rust-lang/rust/issues/54800
-    // Once the issue is resolved, we should remove this workaround.
-    if cfg!(unix) && !from.is_file() {
-      return Err(custom_error(
-        "NotFound",
-        format!(
-          "File not found, copy '{}' -> '{}'",
-          from.display(),
-          to.display()
-        ),
-      ));
-    }
-    // returns size of from as u64 (we ignore)
-    std::fs::copy(&from, &to).map_err(|err| {
-      default_err_mapper(
-        err,
-        format!("copy '{}' -> '{}'", from.display(), to.display()),
-      )
-    })?;
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-fn to_msec(maybe_time: Result<SystemTime, io::Error>) -> (u64, bool) {
-  match maybe_time {
-    Ok(time) => (
-      time
-        .duration_since(UNIX_EPOCH)
-        .map(|t| t.as_millis() as u64)
-        .unwrap_or_else(|err| err.duration().as_millis() as u64),
-      true,
-    ),
-    Err(_) => (0, false),
-  }
-}
-
-macro_rules! create_struct_writer {
-  (pub struct $name:ident { $($field:ident: $type:ty),* $(,)? }) => {
-    impl $name {
-      fn write(self, buf: &mut [u32]) {
-        let mut offset = 0;
-        $(
-          let value = self.$field as u64;
-          buf[offset] = value as u32;
-          buf[offset + 1] = (value >> 32) as u32;
-          #[allow(unused_assignments)]
-          {
-            offset += 2;
-          }
-        )*
-      }
-    }
-
-    #[derive(Serialize)]
-    #[serde(rename_all = "camelCase")]
-    struct $name {
-      $($field: $type),*
-    }
-  };
-}
-
-create_struct_writer! {
-  pub struct FsStat {
-    is_file: bool,
-    is_directory: bool,
-    is_symlink: bool,
-    size: u64,
-    // In milliseconds, like JavaScript. Available on both Unix or Windows.
-    mtime_set: bool,
-    mtime: u64,
-    atime_set: bool,
-    atime: u64,
-    birthtime_set: bool,
-    birthtime: u64,
-    // Following are only valid under Unix.
-    dev: u64,
-    ino: u64,
-    mode: u32,
-    nlink: u64,
-    uid: u32,
-    gid: u32,
-    rdev: u64,
-    blksize: u64,
-    blocks: u64,
-  }
-}
-
-#[inline(always)]
-fn get_stat(metadata: std::fs::Metadata) -> FsStat {
-  // Unix stat member (number types only). 0 if not on unix.
-  macro_rules! usm {
-    ($member:ident) => {{
-      #[cfg(unix)]
-      {
-        metadata.$member()
-      }
-      #[cfg(not(unix))]
-      {
-        0
-      }
-    }};
-  }
-
-  #[cfg(unix)]
-  use std::os::unix::fs::MetadataExt;
-  let (mtime, mtime_set) = to_msec(metadata.modified());
-  let (atime, atime_set) = to_msec(metadata.accessed());
-  let (birthtime, birthtime_set) = to_msec(metadata.created());
-
-  FsStat {
-    is_file: metadata.is_file(),
-    is_directory: metadata.is_dir(),
-    is_symlink: metadata.file_type().is_symlink(),
-    size: metadata.len(),
-    // In milliseconds, like JavaScript. Available on both Unix or Windows.
-    mtime_set,
-    mtime,
-    atime_set,
-    atime,
-    birthtime_set,
-    birthtime,
-    // Following are only valid under Unix.
-    dev: usm!(dev),
-    ino: usm!(ino),
-    mode: usm!(mode),
-    nlink: usm!(nlink),
-    uid: usm!(uid),
-    gid: usm!(gid),
-    rdev: usm!(rdev),
-    blksize: usm!(blksize),
-    blocks: usm!(blocks),
-  }
-}
-
-#[cfg(windows)]
-#[inline(always)]
-fn get_stat2(metadata: std::fs::Metadata, dev: u64) -> FsStat {
-  let (mtime, mtime_set) = to_msec(metadata.modified());
-  let (atime, atime_set) = to_msec(metadata.accessed());
-  let (birthtime, birthtime_set) = to_msec(metadata.created());
-
-  FsStat {
-    is_file: metadata.is_file(),
-    is_directory: metadata.is_dir(),
-    is_symlink: metadata.file_type().is_symlink(),
-    size: metadata.len(),
-    mtime_set,
-    mtime,
-    atime_set,
-    atime,
-    birthtime_set,
-    birthtime,
-    dev,
-    ino: 0,
-    mode: 0,
-    nlink: 0,
-    uid: 0,
-    gid: 0,
-    rdev: 0,
-    blksize: 0,
-    blocks: 0,
-  }
-}
-
-#[cfg(not(windows))]
-#[inline(always)]
-fn get_stat2(metadata: std::fs::Metadata) -> FsStat {
-  #[cfg(unix)]
-  use std::os::unix::fs::MetadataExt;
-  let (mtime, mtime_set) = to_msec(metadata.modified());
-  let (atime, atime_set) = to_msec(metadata.accessed());
-  let (birthtime, birthtime_set) = to_msec(metadata.created());
-
-  FsStat {
-    is_file: metadata.is_file(),
-    is_directory: metadata.is_dir(),
-    is_symlink: metadata.file_type().is_symlink(),
-    size: metadata.len(),
-    mtime_set,
-    mtime,
-    atime_set,
-    atime,
-    birthtime_set,
-    birthtime,
-    dev: metadata.dev(),
-    ino: metadata.ino(),
-    mode: metadata.mode(),
-    nlink: metadata.nlink(),
-    uid: metadata.uid(),
-    gid: metadata.gid(),
-    rdev: metadata.rdev(),
-    blksize: metadata.blksize(),
-    blocks: metadata.blocks(),
-  }
-}
-
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct StatArgs {
-  path: String,
-  lstat: bool,
-}
-
-#[cfg(not(windows))]
-fn do_stat(path: PathBuf, lstat: bool) -> Result<FsStat, AnyError> {
-  let err_mapper =
-    |err| default_err_mapper(err, format!("stat '{}'", path.display()));
-  let metadata = if lstat {
-    std::fs::symlink_metadata(&path).map_err(err_mapper)?
-  } else {
-    std::fs::metadata(&path).map_err(err_mapper)?
-  };
-
-  Ok(get_stat2(metadata))
-}
-
-#[cfg(windows)]
-fn do_stat(path: PathBuf, lstat: bool) -> Result<FsStat, AnyError> {
-  use std::os::windows::prelude::OsStrExt;
-
-  use winapi::um::fileapi::CreateFileW;
-  use winapi::um::fileapi::OPEN_EXISTING;
-  use winapi::um::handleapi::CloseHandle;
-  use winapi::um::handleapi::INVALID_HANDLE_VALUE;
-  use winapi::um::winbase::FILE_FLAG_BACKUP_SEMANTICS;
-  use winapi::um::winbase::FILE_FLAG_OPEN_REPARSE_POINT;
-  use winapi::um::winnt::FILE_SHARE_DELETE;
-  use winapi::um::winnt::FILE_SHARE_READ;
-  use winapi::um::winnt::FILE_SHARE_WRITE;
-
-  let err_mapper =
-    |err| default_err_mapper(err, format!("stat '{}'", path.display()));
-  let metadata = if lstat {
-    std::fs::symlink_metadata(&path).map_err(err_mapper)?
-  } else {
-    std::fs::metadata(&path).map_err(err_mapper)?
-  };
-
-  let (p, file_flags) = if lstat {
-    (
-      path,
-      FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
-    )
-  } else {
-    (path.canonicalize()?, FILE_FLAG_BACKUP_SEMANTICS)
-  };
-  // SAFETY: winapi calls
-  unsafe {
-    let mut path: Vec<_> = p.as_os_str().encode_wide().collect();
-    path.push(0);
-    let file_handle = CreateFileW(
-      path.as_ptr(),
-      0,
-      FILE_SHARE_READ | FILE_SHARE_DELETE | FILE_SHARE_WRITE,
-      std::ptr::null_mut(),
-      OPEN_EXISTING,
-      file_flags,
-      std::ptr::null_mut(),
-    );
-    if file_handle == INVALID_HANDLE_VALUE {
-      return Err(std::io::Error::last_os_error().into());
-    }
-
-    let result = get_dev(file_handle);
-    CloseHandle(file_handle);
-    let dev = result?;
-
-    Ok(get_stat2(metadata, dev))
-  }
-}
-
-#[cfg(windows)]
-use winapi::um::fileapi::GetFileInformationByHandle;
-#[cfg(windows)]
-use winapi::um::fileapi::BY_HANDLE_FILE_INFORMATION;
-
-#[cfg(windows)]
-unsafe fn get_dev(
-  handle: winapi::shared::ntdef::HANDLE,
-) -> std::io::Result<u64> {
-  use winapi::shared::minwindef::FALSE;
-
-  let info = {
-    let mut info =
-      std::mem::MaybeUninit::<BY_HANDLE_FILE_INFORMATION>::zeroed();
-    if GetFileInformationByHandle(handle, info.as_mut_ptr()) == FALSE {
-      return Err(std::io::Error::last_os_error());
-    }
-
-    info.assume_init()
-  };
-
-  Ok(info.dwVolumeSerialNumber as u64)
-}
-
-#[op]
-fn op_stat_sync<P>(
-  state: &mut OpState,
-  path: &str,
-  lstat: bool,
-  out_buf: &mut [u32],
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(path);
-  state
-    .borrow_mut::<P>()
-    .check_read(&path, "Deno.statSync()")?;
-
-  let stat = do_stat(path, lstat)?;
-  stat.write(out_buf);
-
-  Ok(())
-}
-
-#[op]
-async fn op_stat_async<P>(
-  state: Rc<RefCell<OpState>>,
-  args: StatArgs,
-) -> Result<FsStat, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&args.path);
-  let lstat = args.lstat;
-
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_read(&path, "Deno.stat()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    debug!("op_stat_async {} {}", path.display(), lstat);
-    do_stat(path, lstat)
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_realpath_sync<P>(
-  state: &mut OpState,
-  path: String,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-
-  let permissions = state.borrow_mut::<P>();
-  permissions.check_read(&path, "Deno.realPathSync()")?;
-  if path.is_relative() {
-    permissions.check_read_blind(
-      &current_dir()?,
-      "CWD",
-      "Deno.realPathSync()",
-    )?;
-  }
-
-  debug!("op_realpath_sync {}", path.display());
-  // corresponds to the realpath on Unix and
-  // CreateFile and GetFinalPathNameByHandle on Windows
-  let realpath = canonicalize_path(&path).map_err(|error| {
-    default_err_mapper(error, format!("op_realpath_sync '{}'", path.display()))
-  })?;
-  let realpath_str = into_string(realpath.into_os_string())?;
-  Ok(realpath_str)
-}
-
-#[op]
-async fn op_realpath_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-
-  {
-    let mut state = state.borrow_mut();
-    let permissions = state.borrow_mut::<P>();
-    permissions.check_read(&path, "Deno.realPath()")?;
-    if path.is_relative() {
-      permissions.check_read_blind(
-        &current_dir()?,
-        "CWD",
-        "Deno.realPath()",
-      )?;
-    }
-  }
-
-  tokio::task::spawn_blocking(move || {
-    debug!("op_realpath_async {}", path.display());
-    // corresponds to the realpath on Unix and
-    // CreateFile and GetFinalPathNameByHandle on Windows
-    let realpath = canonicalize_path(&path).map_err(|error| {
-      default_err_mapper(
-        error,
-        format!("op_realpath_async '{}'", path.display()),
-      )
-    })?;
-    let realpath_str = into_string(realpath.into_os_string())?;
-    Ok(realpath_str)
-  })
-  .await
-  .unwrap()
-}
-
-#[derive(Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct DirEntry {
-  name: String,
-  is_file: bool,
-  is_directory: bool,
-  is_symlink: bool,
-}
-
-#[op]
-fn op_read_dir_sync<P>(
-  state: &mut OpState,
-  path: String,
-) -> Result<Vec<DirEntry>, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-
-  state
-    .borrow_mut::<P>()
-    .check_read(&path, "Deno.readDirSync()")?;
-
-  debug!("op_read_dir_sync {}", path.display());
-
-  let entries: Vec<_> = std::fs::read_dir(&path)
-    .map_err(|err| {
-      default_err_mapper(err, format!("readdir '{}'", path.display()))
-    })?
-    .filter_map(|entry| {
-      let entry = entry.unwrap();
-      // Not all filenames can be encoded as UTF-8. Skip those for now.
-      if let Ok(name) = into_string(entry.file_name()) {
-        Some(DirEntry {
-          name,
-          is_file: entry
-            .file_type()
-            .map(|file_type| file_type.is_file())
-            .unwrap_or(false),
-          is_directory: entry
-            .file_type()
-            .map(|file_type| file_type.is_dir())
-            .unwrap_or(false),
-          is_symlink: entry
-            .file_type()
-            .map(|file_type| file_type.is_symlink())
-            .unwrap_or(false),
-        })
-      } else {
-        None
-      }
-    })
-    .collect();
-
-  Ok(entries)
-}
-
-#[op]
-async fn op_read_dir_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-) -> Result<Vec<DirEntry>, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-  {
-    let mut state = state.borrow_mut();
-    state
-      .borrow_mut::<P>()
-      .check_read(&path, "Deno.readDir()")?;
-  }
-  tokio::task::spawn_blocking(move || {
-    debug!("op_read_dir_async {}", path.display());
-
-    let entries: Vec<_> = std::fs::read_dir(&path)
-      .map_err(|err| {
-        default_err_mapper(err, format!("readdir '{}'", path.display()))
-      })?
-      .filter_map(|entry| {
-        let entry = entry.unwrap();
-        // Not all filenames can be encoded as UTF-8. Skip those for now.
-        if let Ok(name) = into_string(entry.file_name()) {
-          Some(DirEntry {
-            name,
-            is_file: entry
-              .file_type()
-              .map(|file_type| file_type.is_file())
-              .unwrap_or(false),
-            is_directory: entry
-              .file_type()
-              .map(|file_type| file_type.is_dir())
-              .unwrap_or(false),
-            is_symlink: entry
-              .file_type()
-              .map(|file_type| file_type.is_symlink())
-              .unwrap_or(false),
-          })
-        } else {
-          None
-        }
-      })
-      .collect();
-
-    Ok(entries)
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_rename_sync<P>(
-  state: &mut OpState,
-  oldpath: &str,
-  newpath: &str,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let oldpath = PathBuf::from(oldpath);
-  let newpath = PathBuf::from(newpath);
-
-  let permissions = state.borrow_mut::<P>();
-  permissions.check_read(&oldpath, "Deno.renameSync()")?;
-  permissions.check_write(&oldpath, "Deno.renameSync()")?;
-  permissions.check_write(&newpath, "Deno.renameSync()")?;
-
-  std::fs::rename(&oldpath, &newpath).map_err(|err| {
-    default_err_mapper(
-      err,
-      format!("rename '{}' -> '{}'", oldpath.display(), newpath.display()),
-    )
-  })?;
-  Ok(())
-}
-
-#[op]
-async fn op_rename_async<P>(
-  state: Rc<RefCell<OpState>>,
-  oldpath: String,
-  newpath: String,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let oldpath = PathBuf::from(&oldpath);
-  let newpath = PathBuf::from(&newpath);
-  {
-    let mut state = state.borrow_mut();
-    let permissions = state.borrow_mut::<P>();
-    permissions.check_read(&oldpath, "Deno.rename()")?;
-    permissions.check_write(&oldpath, "Deno.rename()")?;
-    permissions.check_write(&newpath, "Deno.rename()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    std::fs::rename(&oldpath, &newpath).map_err(|err| {
-      default_err_mapper(
-        err,
-        format!("rename '{}' -> '{}'", oldpath.display(), newpath.display()),
-      )
-    })?;
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_link_sync<P>(
-  state: &mut OpState,
-  oldpath: &str,
-  newpath: &str,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let oldpath = PathBuf::from(oldpath);
-  let newpath = PathBuf::from(newpath);
-
-  let permissions = state.borrow_mut::<P>();
-  permissions.check_read(&oldpath, "Deno.linkSync()")?;
-  permissions.check_write(&oldpath, "Deno.linkSync()")?;
-  permissions.check_read(&newpath, "Deno.linkSync()")?;
-  permissions.check_write(&newpath, "Deno.linkSync()")?;
-
-  std::fs::hard_link(&oldpath, &newpath).map_err(|err| {
-    default_err_mapper(
-      err,
-      format!("link '{}' -> '{}'", oldpath.display(), newpath.display()),
-    )
-  })?;
-  Ok(())
-}
-
-#[op]
-async fn op_link_async<P>(
-  state: Rc<RefCell<OpState>>,
-  oldpath: String,
-  newpath: String,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let oldpath = PathBuf::from(&oldpath);
-  let newpath = PathBuf::from(&newpath);
-
-  {
-    let mut state = state.borrow_mut();
-    let permissions = state.borrow_mut::<P>();
-    permissions.check_read(&oldpath, "Deno.link()")?;
-    permissions.check_write(&oldpath, "Deno.link()")?;
-    permissions.check_read(&newpath, "Deno.link()")?;
-    permissions.check_write(&newpath, "Deno.link()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    let err_mapper = |err| {
-      default_err_mapper(
-        err,
-        format!("link '{}' -> '{}'", oldpath.display(), newpath.display()),
-      )
-    };
-    std::fs::hard_link(&oldpath, &newpath).map_err(err_mapper)?;
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_symlink_sync<P>(
-  state: &mut OpState,
-  oldpath: &str,
-  newpath: &str,
-  _type: Option<String>,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let oldpath = PathBuf::from(oldpath);
-  let newpath = PathBuf::from(newpath);
-
-  state
-    .borrow_mut::<P>()
-    .check_write_all("Deno.symlinkSync()")?;
-  state
-    .borrow_mut::<P>()
-    .check_read_all("Deno.symlinkSync()")?;
-
-  let err_mapper = |err| {
-    default_err_mapper(
-      err,
-      format!("symlink '{}' -> '{}'", oldpath.display(), newpath.display()),
-    )
-  };
-
-  #[cfg(unix)]
-  {
-    use std::os::unix::fs::symlink;
-    symlink(&oldpath, &newpath).map_err(err_mapper)?;
-    Ok(())
-  }
-  #[cfg(not(unix))]
-  {
-    use std::os::windows::fs::symlink_dir;
-    use std::os::windows::fs::symlink_file;
-
-    match _type {
-      Some(ty) => match ty.as_ref() {
-        "file" => symlink_file(&oldpath, &newpath).map_err(err_mapper)?,
-        "dir" => symlink_dir(&oldpath, &newpath).map_err(err_mapper)?,
-        _ => return Err(type_error("unsupported type")),
-      },
-      None => {
-        let old_meta = std::fs::metadata(&oldpath);
-        match old_meta {
-          Ok(metadata) => {
-            if metadata.is_file() {
-              symlink_file(&oldpath, &newpath).map_err(err_mapper)?
-            } else if metadata.is_dir() {
-              symlink_dir(&oldpath, &newpath).map_err(err_mapper)?
-            }
-          }
-          Err(_) => return Err(type_error("you must pass a `options` argument for non-existent target path in windows".to_string())),
-        }
-      }
-    };
-    Ok(())
-  }
-}
-
-#[op]
-async fn op_symlink_async<P>(
-  state: Rc<RefCell<OpState>>,
-  oldpath: String,
-  newpath: String,
-  _type: Option<String>,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let oldpath = PathBuf::from(&oldpath);
-  let newpath = PathBuf::from(&newpath);
-
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_write_all("Deno.symlink()")?;
-    state.borrow_mut::<P>().check_read_all("Deno.symlink()")?;
-  }
-
-  tokio::task::spawn_blocking(move || {
-    let err_mapper = |err| default_err_mapper(err, format!(
-      "symlink '{}' -> '{}'",
-      oldpath.display(),
-      newpath.display()
-    ));
-
-    #[cfg(unix)]
-    {
-      use std::os::unix::fs::symlink;
-      symlink(&oldpath, &newpath).map_err(err_mapper)?;
-      Ok(())
-    }
-    #[cfg(not(unix))]
-    {
-      use std::os::windows::fs::{symlink_dir, symlink_file};
-
-      match _type {
-        Some(ty) => match ty.as_ref() {
-          "file" => symlink_file(&oldpath, &newpath).map_err(err_mapper)?,
-          "dir" => symlink_dir(&oldpath, &newpath).map_err(err_mapper)?,
-          _ => return Err(type_error("unsupported type")),
-        },
-        None => {
-          let old_meta = std::fs::metadata(&oldpath);
-          match old_meta {
-            Ok(metadata) => {
-              if metadata.is_file() {
-                symlink_file(&oldpath, &newpath).map_err(err_mapper)?
-              } else if metadata.is_dir() {
-                symlink_dir(&oldpath, &newpath).map_err(err_mapper)?
-              }
-            }
-            Err(_) => return Err(type_error("you must pass a `options` argument for non-existent target path in windows".to_string())),
-          }
-        }
-      };
-      Ok(())
-    }
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_read_link_sync<P>(
-  state: &mut OpState,
-  path: String,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-
-  state
-    .borrow_mut::<P>()
-    .check_read(&path, "Deno.readLink()")?;
-
-  debug!("op_read_link_value {}", path.display());
-  let target = std::fs::read_link(&path)
-    .map_err(|err| {
-      default_err_mapper(err, format!("readlink '{}'", path.display()))
-    })?
-    .into_os_string();
-  let targetstr = into_string(target)?;
-  Ok(targetstr)
-}
-
-#[op]
-async fn op_read_link_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-  {
-    let mut state = state.borrow_mut();
-    state
-      .borrow_mut::<P>()
-      .check_read(&path, "Deno.readLink()")?;
-  }
-  tokio::task::spawn_blocking(move || {
-    debug!("op_read_link_async {}", path.display());
-    let target = std::fs::read_link(&path)
-      .map_err(|err| {
-        default_err_mapper(err, format!("readlink '{}'", path.display()))
-      })?
-      .into_os_string();
-    let targetstr = into_string(target)?;
-    Ok(targetstr)
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_ftruncate_sync(
-  state: &mut OpState,
-  rid: u32,
-  len: i32,
-) -> Result<(), AnyError> {
-  let len = len as u64;
-  StdFileResource::with_file(state, rid, |std_file| {
-    std_file.set_len(len).map_err(AnyError::from)
-  })?;
-  Ok(())
-}
-
-#[op]
-async fn op_ftruncate_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-  len: i32,
-) -> Result<(), AnyError> {
-  let len = len as u64;
-
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    std_file.set_len(len)?;
-    Ok(())
-  })
-  .await
-}
-
-#[op]
-fn op_truncate_sync<P>(
-  state: &mut OpState,
-  path: &str,
-  len: u64,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(path);
-
-  state
-    .borrow_mut::<P>()
-    .check_write(&path, "Deno.truncateSync()")?;
-
-  debug!("op_truncate_sync {} {}", path.display(), len);
-  let err_mapper =
-    |err| default_err_mapper(err, format!("truncate '{}'", path.display()));
-  let f = std::fs::OpenOptions::new()
-    .write(true)
-    .open(&path)
-    .map_err(err_mapper)?;
-  f.set_len(len).map_err(err_mapper)?;
-  Ok(())
-}
-
-#[op]
-async fn op_truncate_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  len: u64,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-
-  {
-    let mut state = state.borrow_mut();
-    state
-      .borrow_mut::<P>()
-      .check_write(&path, "Deno.truncate()")?;
-  }
-  tokio::task::spawn_blocking(move || {
-    debug!("op_truncate_async {} {}", path.display(), len);
-    let err_mapper =
-      |err| default_err_mapper(err, format!("truncate '{}'", path.display()));
-    let f = std::fs::OpenOptions::new()
-      .write(true)
-      .open(&path)
-      .map_err(err_mapper)?;
-    f.set_len(len).map_err(err_mapper)?;
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-fn make_temp(
-  dir: Option<&Path>,
-  prefix: Option<&str>,
-  suffix: Option<&str>,
-  is_dir: bool,
-) -> std::io::Result<PathBuf> {
-  let prefix_ = prefix.unwrap_or("");
-  let suffix_ = suffix.unwrap_or("");
-  let mut buf: PathBuf = match dir {
-    Some(p) => p.to_path_buf(),
-    None => temp_dir(),
-  }
-  .join("_");
-  let mut rng = thread_rng();
-  const MAX_TRIES: u32 = 10;
-  for _ in 0..MAX_TRIES {
-    let unique = rng.gen::<u32>();
-    buf.set_file_name(format!("{prefix_}{unique:08x}{suffix_}"));
-    let r = if is_dir {
-      #[allow(unused_mut)]
-      let mut builder = std::fs::DirBuilder::new();
-      #[cfg(unix)]
-      {
-        use std::os::unix::fs::DirBuilderExt;
-        builder.mode(0o700);
-      }
-      builder.create(buf.as_path())
-    } else {
-      let mut open_options = std::fs::OpenOptions::new();
-      open_options.write(true).create_new(true);
-      #[cfg(unix)]
-      {
-        use std::os::unix::fs::OpenOptionsExt;
-        open_options.mode(0o600);
-      }
-      open_options.open(buf.as_path()).map(drop)
-    };
-    match r {
-      Err(ref e) if e.kind() == std::io::ErrorKind::AlreadyExists => continue,
-      Ok(_) => return Ok(buf),
-      Err(e) => return Err(e),
-    }
-  }
-  Err(io::Error::new(
-    io::ErrorKind::AlreadyExists,
-    "too many temp files exist",
-  ))
-}
-
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct MakeTempArgs {
-  dir: Option<String>,
-  prefix: Option<String>,
-  suffix: Option<String>,
-}
-
-#[op]
-fn op_make_temp_dir_sync<P>(
-  state: &mut OpState,
-  args: MakeTempArgs,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let dir = args.dir.map(|s| PathBuf::from(&s));
-  let prefix = args.prefix.map(String::from);
-  let suffix = args.suffix.map(String::from);
-
-  state.borrow_mut::<P>().check_write(
-    dir.clone().unwrap_or_else(temp_dir).as_path(),
-    "Deno.makeTempDirSync()",
-  )?;
-
-  // TODO(piscisaureus): use byte vector for paths, not a string.
-  // See https://github.com/denoland/deno/issues/627.
-  // We can't assume that paths are always valid utf8 strings.
-  let path = make_temp(
-    // Converting Option<String> to Option<&str>
-    dir.as_deref(),
-    prefix.as_deref(),
-    suffix.as_deref(),
-    true,
-  )?;
-  let path_str = into_string(path.into_os_string())?;
-
-  Ok(path_str)
-}
-
-#[op]
-async fn op_make_temp_dir_async<P>(
-  state: Rc<RefCell<OpState>>,
-  args: MakeTempArgs,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let dir = args.dir.map(|s| PathBuf::from(&s));
-  let prefix = args.prefix.map(String::from);
-  let suffix = args.suffix.map(String::from);
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_write(
-      dir.clone().unwrap_or_else(temp_dir).as_path(),
-      "Deno.makeTempDir()",
-    )?;
-  }
-  tokio::task::spawn_blocking(move || {
-    // TODO(piscisaureus): use byte vector for paths, not a string.
-    // See https://github.com/denoland/deno/issues/627.
-    // We can't assume that paths are always valid utf8 strings.
-    let path = make_temp(
-      // Converting Option<String> to Option<&str>
-      dir.as_deref(),
-      prefix.as_deref(),
-      suffix.as_deref(),
-      true,
-    )?;
-    let path_str = into_string(path.into_os_string())?;
-
-    Ok(path_str)
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_make_temp_file_sync<P>(
-  state: &mut OpState,
-  args: MakeTempArgs,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let dir = args.dir.map(|s| PathBuf::from(&s));
-  let prefix = args.prefix.map(String::from);
-  let suffix = args.suffix.map(String::from);
-
-  state.borrow_mut::<P>().check_write(
-    dir.clone().unwrap_or_else(temp_dir).as_path(),
-    "Deno.makeTempFileSync()",
-  )?;
-
-  // TODO(piscisaureus): use byte vector for paths, not a string.
-  // See https://github.com/denoland/deno/issues/627.
-  // We can't assume that paths are always valid utf8 strings.
-  let path = make_temp(
-    // Converting Option<String> to Option<&str>
-    dir.as_deref(),
-    prefix.as_deref(),
-    suffix.as_deref(),
-    false,
-  )?;
-  let path_str = into_string(path.into_os_string())?;
-
-  Ok(path_str)
-}
-
-#[op]
-async fn op_make_temp_file_async<P>(
-  state: Rc<RefCell<OpState>>,
-  args: MakeTempArgs,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let dir = args.dir.map(|s| PathBuf::from(&s));
-  let prefix = args.prefix.map(String::from);
-  let suffix = args.suffix.map(String::from);
-  {
-    let mut state = state.borrow_mut();
-    state.borrow_mut::<P>().check_write(
-      dir.clone().unwrap_or_else(temp_dir).as_path(),
-      "Deno.makeTempFile()",
-    )?;
-  }
-  tokio::task::spawn_blocking(move || {
-    // TODO(piscisaureus): use byte vector for paths, not a string.
-    // See https://github.com/denoland/deno/issues/627.
-    // We can't assume that paths are always valid utf8 strings.
-    let path = make_temp(
-      // Converting Option<String> to Option<&str>
-      dir.as_deref(),
-      prefix.as_deref(),
-      suffix.as_deref(),
-      false,
-    )?;
-    let path_str = into_string(path.into_os_string())?;
-
-    Ok(path_str)
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_futime_sync(
-  state: &mut OpState,
-  rid: ResourceId,
-  atime_secs: i64,
-  atime_nanos: u32,
-  mtime_secs: i64,
-  mtime_nanos: u32,
-) -> Result<(), AnyError> {
-  let atime = filetime::FileTime::from_unix_time(atime_secs, atime_nanos);
-  let mtime = filetime::FileTime::from_unix_time(mtime_secs, mtime_nanos);
-
-  StdFileResource::with_file(state, rid, |std_file| {
-    filetime::set_file_handle_times(std_file, Some(atime), Some(mtime))
-      .map_err(AnyError::from)
-  })?;
-
-  Ok(())
-}
-
-#[op]
-async fn op_futime_async(
-  state: Rc<RefCell<OpState>>,
-  rid: ResourceId,
-  atime_secs: i64,
-  atime_nanos: u32,
-  mtime_secs: i64,
-  mtime_nanos: u32,
-) -> Result<(), AnyError> {
-  let atime = filetime::FileTime::from_unix_time(atime_secs, atime_nanos);
-  let mtime = filetime::FileTime::from_unix_time(mtime_secs, mtime_nanos);
-
-  StdFileResource::with_file_blocking_task(state, rid, move |std_file| {
-    filetime::set_file_handle_times(std_file, Some(atime), Some(mtime))?;
-    Ok(())
-  })
-  .await
-}
-
-#[op]
-fn op_utime_sync<P>(
-  state: &mut OpState,
-  path: &str,
-  atime_secs: i64,
-  atime_nanos: u32,
-  mtime_secs: i64,
-  mtime_nanos: u32,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(path);
-  let atime = filetime::FileTime::from_unix_time(atime_secs, atime_nanos);
-  let mtime = filetime::FileTime::from_unix_time(mtime_secs, mtime_nanos);
-
-  state.borrow_mut::<P>().check_write(&path, "Deno.utime()")?;
-  filetime::set_file_times(&path, atime, mtime).map_err(|err| {
-    default_err_mapper(err, format!("utime '{}'", path.display()))
-  })?;
-  Ok(())
-}
-
-#[op]
-async fn op_utime_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  atime_secs: i64,
-  atime_nanos: u32,
-  mtime_secs: i64,
-  mtime_nanos: u32,
-) -> Result<(), AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = PathBuf::from(&path);
-  let atime = filetime::FileTime::from_unix_time(atime_secs, atime_nanos);
-  let mtime = filetime::FileTime::from_unix_time(mtime_secs, mtime_nanos);
-
-  state
-    .borrow_mut()
-    .borrow_mut::<P>()
-    .check_write(&path, "Deno.utime()")?;
-
-  tokio::task::spawn_blocking(move || {
-    filetime::set_file_times(&path, atime, mtime).map_err(|err| {
-      default_err_mapper(err, format!("utime '{}'", path.display()))
-    })?;
-    Ok(())
-  })
-  .await
-  .unwrap()
-}
-
-#[op]
-fn op_cwd<P>(state: &mut OpState) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = current_dir()?;
-  state
-    .borrow_mut::<P>()
-    .check_read_blind(&path, "CWD", "Deno.cwd()")?;
-  let path_str = into_string(path.into_os_string())?;
-  Ok(path_str)
-}
-
-#[op]
-fn op_readfile_sync<P>(
-  state: &mut OpState,
-  path: String,
-) -> Result<ZeroCopyBuf, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(&path);
-  state
-    .borrow_mut::<P>()
-    .check_read(path, "Deno.readFileSync()")?;
-  Ok(
-    std::fs::read(path)
-      .map_err(|err| {
-        default_err_mapper(err, format!("readfile '{}'", path.display()))
-      })?
-      .into(),
-  )
-}
-
-#[op]
-fn op_readfile_text_sync<P>(
-  state: &mut OpState,
-  path: String,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  let path = Path::new(&path);
-  state
-    .borrow_mut::<P>()
-    .check_read(path, "Deno.readTextFileSync()")?;
-  Ok(string_from_utf8_lossy(std::fs::read(path).map_err(
-    |err| default_err_mapper(err, format!("readfile '{}'", path.display())),
-  )?))
-}
-
-#[op]
-async fn op_readfile_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  cancel_rid: Option<ResourceId>,
-) -> Result<ZeroCopyBuf, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  {
-    let path = Path::new(&path);
-    let mut state = state.borrow_mut();
-    state
-      .borrow_mut::<P>()
-      .check_read(path, "Deno.readFile()")?;
-  }
-
-  let read_future = tokio::task::spawn_blocking(move || {
-    let path = Path::new(&path);
-    std::fs::read(path).map(ZeroCopyBuf::from).map_err(|err| {
-      default_err_mapper(err, format!("readfile '{}'", path.display()))
-    })
-  });
-
-  let cancel_handle = cancel_rid.and_then(|rid| {
-    state
-      .borrow_mut()
-      .resource_table
-      .get::<CancelHandle>(rid)
-      .ok()
-  });
-
-  if let Some(cancel_handle) = cancel_handle {
-    let read_future_rv = read_future.or_cancel(cancel_handle).await;
-
-    if let Some(cancel_rid) = cancel_rid {
-      state.borrow_mut().resource_table.close(cancel_rid).ok();
-    };
-
-    return read_future_rv??;
-  }
-
-  read_future.await?
-}
-
-#[op]
-async fn op_readfile_text_async<P>(
-  state: Rc<RefCell<OpState>>,
-  path: String,
-  cancel_rid: Option<ResourceId>,
-) -> Result<String, AnyError>
-where
-  P: FsPermissions + 'static,
-{
-  {
-    let path = Path::new(&path);
-    let mut state = state.borrow_mut();
-    state
-      .borrow_mut::<P>()
-      .check_read(path, "Deno.readTextFile()")?;
-  }
-
-  let read_future = tokio::task::spawn_blocking(move || {
-    let path = Path::new(&path);
-    Ok(string_from_utf8_lossy(std::fs::read(path).map_err(
-      |err| default_err_mapper(err, format!("readfile '{}'", path.display())),
-    )?))
-  });
-
-  let cancel_handle = cancel_rid.and_then(|rid| {
-    state
-      .borrow_mut()
-      .resource_table
-      .get::<CancelHandle>(rid)
-      .ok()
-  });
-
-  if let Some(cancel_handle) = cancel_handle {
-    let read_future_rv = read_future.or_cancel(cancel_handle).await;
-
-    if let Some(cancel_rid) = cancel_rid {
-      state.borrow_mut().resource_table.close(cancel_rid).ok();
-    };
-
-    return read_future_rv??;
-  }
-
-  read_future.await?
-}
-
-// Like String::from_utf8_lossy but operates on owned values
-fn string_from_utf8_lossy(buf: Vec<u8>) -> String {
-  match String::from_utf8_lossy(&buf) {
-    // buf contained non-utf8 chars than have been patched
-    Cow::Owned(s) => s,
-    // SAFETY: if Borrowed then the buf only contains utf8 chars,
-    // we do this instead of .into_owned() to avoid copying the input buf
-    Cow::Borrowed(_) => unsafe { String::from_utf8_unchecked(buf) },
-  }
-}