diff --git a/crates/test-programs/build.rs b/crates/test-programs/build.rs
index ff23b6f833..c953c57440 100644
--- a/crates/test-programs/build.rs
+++ b/crates/test-programs/build.rs
@@ -105,14 +105,7 @@ mod wasi_tests {
         )?;
         writeln!(out, "    use super::{{runtime, utils, setup_log}};")?;
         for dir_entry in dir_entries {
-            let test_path = dir_entry.path();
-            let stemstr = test_path
-                .file_stem()
-                .expect("file_stem")
-                .to_str()
-                .expect("to_str");
-
-            write_testsuite_tests(out, &test_path, testsuite)?;
+            write_testsuite_tests(out, &dir_entry.path(), testsuite)?;
         }
         writeln!(out, "}}")?;
         Ok(())
diff --git a/crates/test-programs/tests/wasm_tests/runtime.rs b/crates/test-programs/tests/wasm_tests/runtime.rs
index bf05ff7757..3073d9453f 100644
--- a/crates/test-programs/tests/wasm_tests/runtime.rs
+++ b/crates/test-programs/tests/wasm_tests/runtime.rs
@@ -1,12 +1,8 @@
 use anyhow::Context;
-use std::convert::TryFrom;
 use std::fs::File;
 use std::path::Path;
-use wasi_c2::{
-    virt::pipe::{ReadPipe, WritePipe},
-    WasiCtx,
-};
-use wasmtime::{Config, Engine, Linker, Module, Store};
+use wasi_c2::virt::pipe::{ReadPipe, WritePipe};
+use wasmtime::{Linker, Module, Store};
 
 pub fn instantiate(data: &[u8], bin_name: &str, workspace: Option<&Path>) -> anyhow::Result<()> {
     let stdout = WritePipe::new_in_memory();
@@ -27,6 +23,7 @@ pub fn instantiate(data: &[u8], bin_name: &str, workspace: Option<&Path>) -> any
             .stderr(Box::new(stderr.clone()));
 
         if let Some(workspace) = workspace {
+            println!("preopen: {:?}", workspace);
             let dirfd =
                 File::open(workspace).context(format!("error while preopening {:?}", workspace))?;
             let preopen_dir = unsafe { cap_std::fs::Dir::from_std_file(dirfd) };
@@ -67,15 +64,3 @@ pub fn instantiate(data: &[u8], bin_name: &str, workspace: Option<&Path>) -> any
         }
     }
 }
-
-#[cfg(unix)]
-fn reader_to_file(reader: os_pipe::PipeReader) -> File {
-    use std::os::unix::prelude::*;
-    unsafe { File::from_raw_fd(reader.into_raw_fd()) }
-}
-
-#[cfg(windows)]
-fn reader_to_file(reader: os_pipe::PipeReader) -> File {
-    use std::os::windows::prelude::*;
-    unsafe { File::from_raw_handle(reader.into_raw_handle()) }
-}
diff --git a/crates/wasi-c2/src/ctx.rs b/crates/wasi-c2/src/ctx.rs
index 7b70bcd0ea..e7156f12a5 100644
--- a/crates/wasi-c2/src/ctx.rs
+++ b/crates/wasi-c2/src/ctx.rs
@@ -38,7 +38,7 @@ impl WasiCtx {
             inheriting_caps,
             file,
         };
-        self.table().insert_at(fd, e);
+        self.table().insert_at(fd, Box::new(e));
     }
 
     pub fn insert_dir(
@@ -55,7 +55,7 @@ impl WasiCtx {
             preopen_path: Some(path),
             dir,
         };
-        self.table().insert_at(fd, e);
+        self.table().insert_at(fd, Box::new(e));
     }
 
     pub fn table(&self) -> RefMut<Table> {
@@ -118,12 +118,12 @@ impl WasiCtxBuilder {
     ) -> Result<&mut Self, Error> {
         let base_caps = DirCaps::OPEN;
         let inheriting_caps = DirCaps::OPEN;
-        self.0.table().push(DirEntry {
+        self.0.table().push(Box::new(DirEntry {
             base_caps,
             inheriting_caps,
             preopen_path: Some(path.as_ref().to_owned()),
             dir,
-        })?;
+        }))?;
         Ok(self)
     }
 }
diff --git a/crates/wasi-c2/src/dir.rs b/crates/wasi-c2/src/dir.rs
index 68e0af539d..8736f09fb6 100644
--- a/crates/wasi-c2/src/dir.rs
+++ b/crates/wasi-c2/src/dir.rs
@@ -1,17 +1,18 @@
 // this file is extremely wip
 #![allow(dead_code, unused_variables)]
 use crate::error::Error;
-use crate::file::{self, WasiFile};
+use crate::file::{FileCaps, OFlags, WasiFile};
 use std::ops::Deref;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
+use tracing::debug;
 
 pub trait WasiDir {
     fn open_file(
         &self,
         symlink_follow: bool,
         path: &str,
-        oflags: file::OFlags,
-        fdflags: file::FdFlags,
+        oflags: OFlags,
+        caps: FileCaps,
     ) -> Result<Box<dyn WasiFile>, Error>;
 
     fn open_dir(
@@ -42,6 +43,13 @@ impl DirEntry {
             Err(Error::DirNotCapable(caps))
         }
     }
+
+    pub fn get_dirstat(&self) -> DirStat {
+        DirStat {
+            base_caps: self.base_caps,
+            inheriting_caps: self.inheriting_caps,
+        }
+    }
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -59,14 +67,32 @@ impl DirCaps {
         self.flags & other.flags == other.flags
     }
 
-    pub const OPEN: Self = DirCaps { flags: 1 };
-    pub const READDIR: Self = DirCaps { flags: 2 };
-    pub const READLINK: Self = DirCaps { flags: 4 };
-    pub const RENAME_SOURCE: Self = DirCaps { flags: 8 };
-    pub const RENAME_TARGET: Self = DirCaps { flags: 16 };
-    pub const SYMLINK: Self = DirCaps { flags: 32 };
-    pub const REMOVE_DIRECTORY: Self = DirCaps { flags: 64 };
-    pub const UNLINK_FILE: Self = DirCaps { flags: 128 };
+    pub const CREATE_DIRECTORY: Self = DirCaps { flags: 1 };
+    pub const CREATE_FILE: Self = DirCaps { flags: 2 };
+    pub const LINK_SOURCE: Self = DirCaps { flags: 4 };
+    pub const LINK_TARGET: Self = DirCaps { flags: 8 };
+    pub const OPEN: Self = DirCaps { flags: 16 };
+    pub const READDIR: Self = DirCaps { flags: 32 };
+    pub const READLINK: Self = DirCaps { flags: 64 };
+    pub const RENAME_SOURCE: Self = DirCaps { flags: 128 };
+    pub const RENAME_TARGET: Self = DirCaps { flags: 256 };
+    pub const SYMLINK: Self = DirCaps { flags: 512 };
+    pub const REMOVE_DIRECTORY: Self = DirCaps { flags: 1024 };
+    pub const UNLINK_FILE: Self = DirCaps { flags: 2048 };
+}
+
+impl std::ops::BitOr for DirCaps {
+    type Output = DirCaps;
+    fn bitor(self, rhs: DirCaps) -> DirCaps {
+        DirCaps {
+            flags: self.flags | rhs.flags,
+        }
+    }
+}
+
+pub struct DirStat {
+    pub base_caps: DirCaps,
+    pub inheriting_caps: DirCaps,
 }
 
 impl std::fmt::Display for DirCaps {
@@ -121,10 +147,31 @@ impl WasiDir for cap_std::fs::Dir {
         &self,
         symlink_follow: bool,
         path: &str,
-        oflags: file::OFlags,
-        fdflags: file::FdFlags,
+        oflags: OFlags,
+        caps: FileCaps,
     ) -> Result<Box<dyn WasiFile>, Error> {
-        todo!()
+        // XXX obey symlink_follow
+        // XXX how to handle fdflags like append? OFlags dont contain read|write?
+        let mut opts = cap_std::fs::OpenOptions::new();
+        if oflags.contains(&(OFlags::CREATE | OFlags::EXCLUSIVE)) {
+            opts.create_new(true);
+        } else if oflags.contains(&OFlags::CREATE) {
+            opts.create(true);
+        }
+        if oflags.contains(&OFlags::TRUNCATE) {
+            opts.truncate(true);
+        }
+        if caps.contains(&FileCaps::READ) {
+            opts.read(true);
+        }
+        if caps.contains(&FileCaps::WRITE) {
+            opts.write(true);
+        }
+
+        debug!("Dir::open_file({:?}, {:?})", path, opts);
+        let f = self.open_with(Path::new(path), &opts)?;
+        debug!("succeeded");
+        Ok(Box::new(f))
     }
 
     fn open_dir(
@@ -133,7 +180,9 @@ impl WasiDir for cap_std::fs::Dir {
         path: &str,
         create: bool,
     ) -> Result<Box<dyn WasiDir>, Error> {
-        todo!()
+        // XXX obey symlink_follow, create
+        let d = self.open_dir(Path::new(path))?;
+        Ok(Box::new(d))
     }
 
     fn readdir(
diff --git a/crates/wasi-c2/src/file.rs b/crates/wasi-c2/src/file.rs
index 4acfbd2f87..476fa01995 100644
--- a/crates/wasi-c2/src/file.rs
+++ b/crates/wasi-c2/src/file.rs
@@ -1,5 +1,4 @@
 use crate::Error;
-use cfg_if::cfg_if;
 use fs_set_times::SetTimes;
 use std::ops::Deref;
 use system_interface::fs::FileIoExt;
@@ -9,6 +8,7 @@ pub trait WasiFile: FileIoExt + SetTimes {
     fn sync(&self) -> Result<(), Error>;
     fn get_filetype(&self) -> Result<Filetype, Error>;
     fn get_fdflags(&self) -> Result<FdFlags, Error>;
+    fn set_fdflags(&self, _flags: FdFlags) -> Result<(), Error>;
     fn get_oflags(&self) -> Result<OFlags, Error>;
     fn set_oflags(&self, _flags: OFlags) -> Result<(), Error>;
     fn get_filestat(&self) -> Result<Filestat, Error>;
@@ -38,7 +38,9 @@ impl FdFlags {
     pub fn contains(&self, other: &Self) -> bool {
         self.flags & other.flags == other.flags
     }
-
+    pub fn empty() -> FdFlags {
+        FdFlags { flags: 0 }
+    }
     pub const APPEND: FdFlags = FdFlags { flags: 1 };
     pub const DSYNC: FdFlags = FdFlags { flags: 2 };
     pub const NONBLOCK: FdFlags = FdFlags { flags: 4 };
@@ -47,6 +49,15 @@ impl FdFlags {
     // etc
 }
 
+impl std::ops::BitOr for FdFlags {
+    type Output = FdFlags;
+    fn bitor(self, rhs: FdFlags) -> FdFlags {
+        FdFlags {
+            flags: self.flags | rhs.flags,
+        }
+    }
+}
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq)]
 pub struct OFlags {
     flags: u32,
@@ -57,19 +68,21 @@ impl OFlags {
     pub fn contains(&self, other: &Self) -> bool {
         self.flags & other.flags == other.flags
     }
-
-    pub const ACCMODE: OFlags = OFlags { flags: 1 };
-    pub const APPEND: OFlags = OFlags { flags: 2 };
-    pub const CREATE: OFlags = OFlags { flags: 4 };
-    pub const SYNC: OFlags = OFlags { flags: 4 };
-    pub const NOFOLLOW: OFlags = OFlags { flags: 8 };
-    pub const NONBLOCK: OFlags = OFlags { flags: 16 };
-    pub const RDONLY: OFlags = OFlags { flags: 32 };
-    pub const WRONLY: OFlags = OFlags { flags: 64 };
-    pub const RDWR: OFlags = OFlags {
-        flags: Self::RDONLY.flags | Self::WRONLY.flags,
-    };
-    // etc
+    pub fn empty() -> Self {
+        OFlags { flags: 0 }
+    }
+    pub const CREATE: OFlags = OFlags { flags: 1 };
+    pub const DIRECTORY: OFlags = OFlags { flags: 2 };
+    pub const EXCLUSIVE: OFlags = OFlags { flags: 4 };
+    pub const TRUNCATE: OFlags = OFlags { flags: 8 };
+}
+impl std::ops::BitOr for OFlags {
+    type Output = OFlags;
+    fn bitor(self, rhs: OFlags) -> OFlags {
+        OFlags {
+            flags: self.flags | rhs.flags,
+        }
+    }
 }
 
 #[derive(Debug, Clone)]
@@ -181,34 +194,17 @@ impl WasiFile for cap_std::fs::File {
         }
     }
     fn get_fdflags(&self) -> Result<FdFlags, Error> {
-        // XXX cap-std doesnt expose append, dsync, nonblock, rsync, sync
-        todo!("get_fdflags is not implemented")
+        // XXX get_fdflags is not implemented but lets lie rather than panic:
+        Ok(FdFlags::empty())
+    }
+    fn set_fdflags(&self, _fdflags: FdFlags) -> Result<(), Error> {
+        todo!("set_fdflags is not implemented")
     }
     fn get_oflags(&self) -> Result<OFlags, Error> {
-        #![allow(unreachable_code, unused_variables)]
-        todo!("get_oflags implementation is incomplete");
-        // XXX what if it was opened append, async, nonblock...
-        let perms = self.metadata()?.permissions();
-        if perms.readonly() {
-            Ok(OFlags::RDONLY)
-        } else {
-            Ok(OFlags::RDWR)
-        }
+        todo!("get_oflags is not implemented");
     }
     fn set_oflags(&self, flags: OFlags) -> Result<(), Error> {
-        #![allow(unreachable_code, unused_variables)]
-        cfg_if! {
-            if #[cfg(unix)] {
-                use std::os::unix::fs::PermissionsExt;
-                use cap_std::fs::Permissions;
-                use std::fs::Permissions as StdPermissions;
-                let flags = todo!("normalize to unix flags {:?}", flags);
-                self.set_permissions(Permissions::from_std(StdPermissions::from_mode(flags)))?;
-            } else {
-                Err(Error::Unsupported("set oflags on non-unix host system".to_owned()))
-            }
-        }
-        Ok(())
+        todo!("set_oflags is not implemented");
     }
     fn get_filestat(&self) -> Result<Filestat, Error> {
         let meta = self.metadata()?;
diff --git a/crates/wasi-c2/src/snapshots/preview_1.rs b/crates/wasi-c2/src/snapshots/preview_1.rs
index 65e6c68305..062fe2a1f5 100644
--- a/crates/wasi-c2/src/snapshots/preview_1.rs
+++ b/crates/wasi-c2/src/snapshots/preview_1.rs
@@ -1,5 +1,5 @@
 #![allow(unused_variables)]
-use crate::dir::{DirCaps, DirEntry, ReaddirCursor, TableDirExt};
+use crate::dir::{DirCaps, DirEntry, DirStat, ReaddirCursor, TableDirExt};
 use crate::file::{FdFlags, FdStat, FileCaps, FileEntry, Filestat, Filetype, OFlags};
 use crate::{Error, WasiCtx};
 use fs_set_times::SystemTimeSpec;
@@ -168,6 +168,9 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
         let mut table = self.table();
         let fd = u32::from(fd);
 
+        if !table.contains_key(fd) {
+            return Err(Error::Badf);
+        }
         // fd_close must close either a File or a Dir handle
         if table.is::<FileEntry>(fd) {
             let _ = table.delete(fd);
@@ -179,6 +182,9 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
             }
             drop(dir_entry);
             let _ = table.delete(fd);
+        } else {
+            // XXX do we just table delete anyway?
+            return Err(Error::Badf);
         }
 
         Ok(())
@@ -194,16 +200,25 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
 
     fn fd_fdstat_get(&self, fd: types::Fd) -> Result<types::Fdstat, Error> {
         let table = self.table();
-        let file_entry: RefMut<FileEntry> = table.get(u32::from(fd))?;
-        let fdstat = file_entry.get_fdstat()?;
-        Ok(types::Fdstat::from(&fdstat))
+        let fd = u32::from(fd);
+        if table.is::<FileEntry>(fd) {
+            let file_entry: RefMut<FileEntry> = table.get(fd)?;
+            let fdstat = file_entry.get_fdstat()?;
+            Ok(types::Fdstat::from(&fdstat))
+        } else if table.is::<DirEntry>(fd) {
+            let dir_entry: RefMut<DirEntry> = table.get(fd)?;
+            let dirstat = dir_entry.get_dirstat();
+            Ok(types::Fdstat::from(&dirstat))
+        } else {
+            Err(Error::Badf)
+        }
     }
 
     fn fd_fdstat_set_flags(&self, fd: types::Fd, flags: types::Fdflags) -> Result<(), Error> {
         let table = self.table();
         let file_entry: RefMut<FileEntry> = table.get(u32::from(fd))?;
         let f = file_entry.get_cap(FileCaps::FDSTAT_SET_FLAGS)?;
-        f.set_oflags(OFlags::try_from(&flags)?)?;
+        f.set_fdflags(FdFlags::from(&flags))?;
         Ok(())
     }
 
@@ -559,39 +574,40 @@ impl<'a> wasi_snapshot_preview1::WasiSnapshotPreview1 for WasiCtx {
         let dir_entry: RefMut<DirEntry> = table.get(u32::from(dirfd))?;
         let dir = dir_entry.get_cap(DirCaps::OPEN)?;
         let symlink_follow = dirflags.contains(&types::Lookupflags::SYMLINK_FOLLOW);
+        let oflags = OFlags::from(&oflags);
+        let fdflags = FdFlags::from(&fdflags);
         let path = path.as_str()?;
-        if oflags.contains(&types::Oflags::DIRECTORY) {
-            let create = oflags.contains(&types::Oflags::CREAT);
+        if oflags.contains(&OFlags::DIRECTORY) {
+            let create = oflags.contains(&OFlags::CREATE);
             let child_dir = dir.open_dir(symlink_follow, path.deref(), create)?;
 
             // XXX go back and check these caps conversions - probably need to validate them
             // against ???
-            let base_caps = DirCaps::try_from(&fs_rights_base)?;
-            let inheriting_caps = DirCaps::try_from(&fs_rights_inheriting)?;
+            let base_caps = DirCaps::from(&fs_rights_base);
+            let inheriting_caps = DirCaps::from(&fs_rights_inheriting);
             drop(dir);
             drop(dir_entry);
-            let fd = table.push(DirEntry {
+            let fd = table.push(Box::new(DirEntry {
                 dir: child_dir,
                 base_caps,
                 inheriting_caps,
                 preopen_path: None,
-            })?;
+            }))?;
             Ok(types::Fd::from(fd))
         } else {
-            let oflags = OFlags::try_from(&oflags)?;
-            let fdflags = FdFlags::try_from(&fdflags)?;
-            let file = dir.open_file(symlink_follow, path.deref(), oflags, fdflags)?;
             // XXX go back and check these caps conversions - probably need to validate them
             // against ???
-            let base_caps = FileCaps::try_from(&fs_rights_base)?;
-            let inheriting_caps = FileCaps::try_from(&fs_rights_inheriting)?;
+            let base_caps = FileCaps::from(&fs_rights_base);
+            let inheriting_caps = FileCaps::from(&fs_rights_inheriting);
+
+            let file = dir.open_file(symlink_follow, path.deref(), oflags, base_caps)?;
             drop(dir);
             drop(dir_entry);
-            let fd = table.push(FileEntry {
+            let fd = table.push(Box::new(FileEntry {
                 file,
                 base_caps,
                 inheriting_caps,
-            })?;
+            }))?;
             Ok(types::Fd::from(fd))
         }
     }
@@ -709,26 +725,187 @@ impl From<&FdStat> for types::Fdstat {
     }
 }
 
+impl From<&DirStat> for types::Fdstat {
+    fn from(dirstat: &DirStat) -> types::Fdstat {
+        types::Fdstat {
+            fs_filetype: types::Filetype::Directory,
+            fs_rights_base: types::Rights::from(&dirstat.base_caps),
+            fs_rights_inheriting: types::Rights::from(&dirstat.inheriting_caps),
+            fs_flags: types::Fdflags::empty(),
+        }
+    }
+}
+
 // FileCaps can always be represented as wasi Rights
 impl From<&FileCaps> for types::Rights {
     fn from(caps: &FileCaps) -> types::Rights {
-        todo!("translate FileCaps flags to Rights flags")
+        let mut rights = types::Rights::empty();
+        if caps.contains(&FileCaps::DATASYNC) {
+            rights = rights | types::Rights::FD_DATASYNC;
+        }
+        if caps.contains(&FileCaps::READ) {
+            rights = rights | types::Rights::FD_READ;
+        }
+        if caps.contains(&FileCaps::SEEK) {
+            rights = rights | types::Rights::FD_SEEK;
+        }
+        if caps.contains(&FileCaps::FDSTAT_SET_FLAGS) {
+            rights = rights | types::Rights::FD_FDSTAT_SET_FLAGS;
+        }
+        if caps.contains(&FileCaps::SYNC) {
+            rights = rights | types::Rights::FD_SYNC;
+        }
+        if caps.contains(&FileCaps::TELL) {
+            rights = rights | types::Rights::FD_TELL;
+        }
+        if caps.contains(&FileCaps::WRITE) {
+            rights = rights | types::Rights::FD_WRITE;
+        }
+        if caps.contains(&FileCaps::ADVISE) {
+            rights = rights | types::Rights::FD_ADVISE;
+        }
+        if caps.contains(&FileCaps::ALLOCATE) {
+            rights = rights | types::Rights::FD_ALLOCATE;
+        }
+        if caps.contains(&FileCaps::FILESTAT_GET) {
+            rights = rights | types::Rights::PATH_FILESTAT_GET;
+        }
+        if caps.contains(&FileCaps::FILESTAT_SET_SIZE) {
+            rights = rights | types::Rights::PATH_FILESTAT_SET_SIZE;
+        }
+        if caps.contains(&FileCaps::FILESTAT_SET_TIMES) {
+            rights = rights | types::Rights::PATH_FILESTAT_SET_TIMES;
+        }
+        rights
     }
 }
 
 // FileCaps are a subset of wasi Rights - not all Rights have a valid representation as FileCaps
-impl TryFrom<&types::Rights> for FileCaps {
-    type Error = Error;
-    fn try_from(rights: &types::Rights) -> Result<FileCaps, Self::Error> {
-        todo!("translate Rights flags to FileCaps flags")
+impl From<&types::Rights> for FileCaps {
+    fn from(rights: &types::Rights) -> FileCaps {
+        let mut caps = FileCaps::empty();
+        if rights.contains(&types::Rights::FD_DATASYNC) {
+            caps = caps | FileCaps::DATASYNC;
+        }
+        if rights.contains(&types::Rights::FD_READ) {
+            caps = caps | FileCaps::READ;
+        }
+        if rights.contains(&types::Rights::FD_SEEK) {
+            caps = caps | FileCaps::SEEK;
+        }
+        if rights.contains(&types::Rights::FD_FDSTAT_SET_FLAGS) {
+            caps = caps | FileCaps::FDSTAT_SET_FLAGS;
+        }
+        if rights.contains(&types::Rights::FD_SYNC) {
+            caps = caps | FileCaps::SYNC;
+        }
+        if rights.contains(&types::Rights::FD_TELL) {
+            caps = caps | FileCaps::TELL;
+        }
+        if rights.contains(&types::Rights::FD_WRITE) {
+            caps = caps | FileCaps::WRITE;
+        }
+        if rights.contains(&types::Rights::FD_ALLOCATE) {
+            caps = caps | FileCaps::ALLOCATE;
+        }
+        if rights.contains(&types::Rights::PATH_FILESTAT_GET) {
+            caps = caps | FileCaps::FILESTAT_GET;
+        }
+        if rights.contains(&types::Rights::PATH_FILESTAT_SET_SIZE) {
+            caps = caps | FileCaps::FILESTAT_SET_SIZE;
+        }
+        if rights.contains(&types::Rights::PATH_FILESTAT_SET_TIMES) {
+            caps = caps | FileCaps::FILESTAT_SET_TIMES;
+        }
+        caps
+    }
+}
+
+// DirCaps can always be represented as wasi Rights
+impl From<&DirCaps> for types::Rights {
+    fn from(caps: &DirCaps) -> types::Rights {
+        let mut rights = types::Rights::empty();
+        if caps.contains(&DirCaps::CREATE_DIRECTORY) {
+            rights = rights | types::Rights::PATH_CREATE_DIRECTORY;
+        }
+        if caps.contains(&DirCaps::CREATE_FILE) {
+            rights = rights | types::Rights::PATH_CREATE_FILE;
+        }
+        if caps.contains(&DirCaps::LINK_SOURCE) {
+            rights = rights | types::Rights::PATH_LINK_SOURCE;
+        }
+        if caps.contains(&DirCaps::LINK_TARGET) {
+            rights = rights | types::Rights::PATH_LINK_TARGET;
+        }
+        if caps.contains(&DirCaps::OPEN) {
+            rights = rights | types::Rights::PATH_OPEN;
+        }
+        if caps.contains(&DirCaps::READDIR) {
+            rights = rights | types::Rights::FD_READDIR;
+        }
+        if caps.contains(&DirCaps::READLINK) {
+            rights = rights | types::Rights::PATH_READLINK;
+        }
+        if caps.contains(&DirCaps::RENAME_SOURCE) {
+            rights = rights | types::Rights::PATH_RENAME_SOURCE;
+        }
+        if caps.contains(&DirCaps::RENAME_TARGET) {
+            rights = rights | types::Rights::PATH_RENAME_TARGET;
+        }
+        if caps.contains(&DirCaps::SYMLINK) {
+            rights = rights | types::Rights::PATH_SYMLINK;
+        }
+        if caps.contains(&DirCaps::REMOVE_DIRECTORY) {
+            rights = rights | types::Rights::PATH_REMOVE_DIRECTORY;
+        }
+        if caps.contains(&DirCaps::UNLINK_FILE) {
+            rights = rights | types::Rights::PATH_UNLINK_FILE;
+        }
+        rights
     }
 }
 
 // DirCaps are a subset of wasi Rights - not all Rights have a valid representation as DirCaps
-impl TryFrom<&types::Rights> for DirCaps {
-    type Error = Error;
-    fn try_from(rights: &types::Rights) -> Result<DirCaps, Self::Error> {
-        todo!("translate Rights flags to DirCaps flags")
+impl From<&types::Rights> for DirCaps {
+    fn from(rights: &types::Rights) -> DirCaps {
+        let mut caps = DirCaps::empty();
+        if rights.contains(&types::Rights::PATH_CREATE_DIRECTORY) {
+            caps = caps | DirCaps::CREATE_DIRECTORY;
+        }
+        if rights.contains(&types::Rights::PATH_CREATE_FILE) {
+            caps = caps | DirCaps::CREATE_FILE;
+        }
+        if rights.contains(&types::Rights::PATH_LINK_SOURCE) {
+            caps = caps | DirCaps::LINK_SOURCE;
+        }
+        if rights.contains(&types::Rights::PATH_LINK_TARGET) {
+            caps = caps | DirCaps::LINK_TARGET;
+        }
+        if rights.contains(&types::Rights::PATH_OPEN) {
+            caps = caps | DirCaps::OPEN;
+        }
+        if rights.contains(&types::Rights::FD_READDIR) {
+            caps = caps | DirCaps::READDIR;
+        }
+        if rights.contains(&types::Rights::PATH_READLINK) {
+            caps = caps | DirCaps::READLINK;
+        }
+        if rights.contains(&types::Rights::PATH_RENAME_SOURCE) {
+            caps = caps | DirCaps::RENAME_SOURCE;
+        }
+        if rights.contains(&types::Rights::PATH_RENAME_TARGET) {
+            caps = caps | DirCaps::RENAME_TARGET;
+        }
+        if rights.contains(&types::Rights::PATH_SYMLINK) {
+            caps = caps | DirCaps::SYMLINK;
+        }
+        if rights.contains(&types::Rights::PATH_REMOVE_DIRECTORY) {
+            caps = caps | DirCaps::REMOVE_DIRECTORY;
+        }
+        if rights.contains(&types::Rights::PATH_UNLINK_FILE) {
+            caps = caps | DirCaps::UNLINK_FILE;
+        }
+        caps
     }
 }
 
@@ -745,34 +922,85 @@ impl From<&Filetype> for types::Filetype {
 }
 impl From<&FdFlags> for types::Fdflags {
     fn from(fdflags: &FdFlags) -> types::Fdflags {
-        todo!("translate internal to Fdflags")
-    }
-}
-
-impl TryFrom<&types::Oflags> for OFlags {
-    type Error = Error;
-    fn try_from(oflags: &types::Oflags) -> Result<OFlags, Self::Error> {
-        if oflags.contains(&types::Oflags::DIRECTORY) {
-            return Err(Error::Inval);
+        let mut out = types::Fdflags::empty();
+        if fdflags.contains(&FdFlags::APPEND) {
+            out = out | types::Fdflags::APPEND;
         }
-        todo!("rest of oflags translation should be trivial - creat excl trunc")
+        if fdflags.contains(&FdFlags::DSYNC) {
+            out = out | types::Fdflags::DSYNC;
+        }
+        if fdflags.contains(&FdFlags::NONBLOCK) {
+            out = out | types::Fdflags::NONBLOCK;
+        }
+        if fdflags.contains(&FdFlags::RSYNC) {
+            out = out | types::Fdflags::RSYNC;
+        }
+        if fdflags.contains(&FdFlags::SYNC) {
+            out = out | types::Fdflags::SYNC;
+        }
+        out
     }
 }
 
-impl TryFrom<&types::Fdflags> for FdFlags {
-    type Error = Error;
-    fn try_from(fdflags: &types::Fdflags) -> Result<FdFlags, Self::Error> {
-        todo!()
+impl From<&types::Fdflags> for FdFlags {
+    fn from(fdflags: &types::Fdflags) -> FdFlags {
+        let mut out = FdFlags::empty();
+        if fdflags.contains(&types::Fdflags::APPEND) {
+            out = out | FdFlags::APPEND;
+        }
+        if fdflags.contains(&types::Fdflags::DSYNC) {
+            out = out | FdFlags::DSYNC;
+        }
+        if fdflags.contains(&types::Fdflags::NONBLOCK) {
+            out = out | FdFlags::NONBLOCK;
+        }
+        if fdflags.contains(&types::Fdflags::RSYNC) {
+            out = out | FdFlags::RSYNC;
+        }
+        if fdflags.contains(&types::Fdflags::SYNC) {
+            out = out | FdFlags::SYNC;
+        }
+        out
     }
 }
 
-impl TryFrom<&types::Fdflags> for OFlags {
-    type Error = Error;
-    fn try_from(fdflags: &types::Fdflags) -> Result<OFlags, Self::Error> {
-        todo!()
+impl From<&types::Oflags> for OFlags {
+    fn from(oflags: &types::Oflags) -> OFlags {
+        let mut out = OFlags::empty();
+        if oflags.contains(&types::Oflags::CREAT) {
+            out = out | OFlags::CREATE;
+        }
+        if oflags.contains(&types::Oflags::DIRECTORY) {
+            out = out | OFlags::DIRECTORY;
+        }
+        if oflags.contains(&types::Oflags::EXCL) {
+            out = out | OFlags::EXCLUSIVE;
+        }
+        if oflags.contains(&types::Oflags::TRUNC) {
+            out = out | OFlags::TRUNCATE;
+        }
+        out
     }
 }
 
+impl From<&OFlags> for types::Oflags {
+    fn from(oflags: &OFlags) -> types::Oflags {
+        let mut out = types::Oflags::empty();
+        if oflags.contains(&OFlags::CREATE) {
+            out = out | types::Oflags::CREAT;
+        }
+        if oflags.contains(&OFlags::DIRECTORY) {
+            out = out | types::Oflags::DIRECTORY;
+        }
+        if oflags.contains(&OFlags::EXCLUSIVE) {
+            out = out | types::Oflags::EXCL;
+        }
+        if oflags.contains(&OFlags::TRUNCATE) {
+            out = out | types::Oflags::TRUNC;
+        }
+        out
+    }
+}
 impl From<Filestat> for types::Filestat {
     fn from(stat: Filestat) -> types::Filestat {
         todo!()
diff --git a/crates/wasi-c2/src/stdio.rs b/crates/wasi-c2/src/stdio.rs
index a53c56596f..c4dd69cb5c 100644
--- a/crates/wasi-c2/src/stdio.rs
+++ b/crates/wasi-c2/src/stdio.rs
@@ -29,6 +29,9 @@ impl WasiFile for Stdin {
     fn get_fdflags(&self) -> Result<FdFlags, Error> {
         todo!()
     }
+    fn set_fdflags(&self, _fdflags: FdFlags) -> Result<(), Error> {
+        todo!()
+    }
     fn get_oflags(&self) -> Result<OFlags, Error> {
         todo!()
     }
@@ -69,6 +72,9 @@ impl WasiFile for Stdout {
     fn get_fdflags(&self) -> Result<FdFlags, Error> {
         todo!()
     }
+    fn set_fdflags(&self, _fdflags: FdFlags) -> Result<(), Error> {
+        todo!()
+    }
     fn get_oflags(&self) -> Result<OFlags, Error> {
         todo!()
     }
@@ -109,6 +115,9 @@ impl WasiFile for Stderr {
     fn get_fdflags(&self) -> Result<FdFlags, Error> {
         todo!()
     }
+    fn set_fdflags(&self, _fdflags: FdFlags) -> Result<(), Error> {
+        todo!()
+    }
     fn get_oflags(&self) -> Result<OFlags, Error> {
         todo!()
     }
diff --git a/crates/wasi-c2/src/table.rs b/crates/wasi-c2/src/table.rs
index 0f13d20893..d94cc020b1 100644
--- a/crates/wasi-c2/src/table.rs
+++ b/crates/wasi-c2/src/table.rs
@@ -16,11 +16,11 @@ impl Table {
         }
     }
 
-    pub fn insert_at(&mut self, key: u32, a: impl Any + Sized) {
-        self.map.insert(key, RefCell::new(Box::new(a)));
+    pub fn insert_at(&mut self, key: u32, a: Box<dyn Any>) {
+        self.map.insert(key, RefCell::new(a));
     }
 
-    pub fn push(&mut self, a: impl Any + Sized) -> Result<u32, Error> {
+    pub fn push(&mut self, a: Box<dyn Any>) -> Result<u32, Error> {
         loop {
             let key = self.next_key;
             // XXX this is not correct. The table may still have empty entries, but our
@@ -29,7 +29,7 @@ impl Table {
             if self.map.contains_key(&key) {
                 continue;
             }
-            self.map.insert(key, RefCell::new(Box::new(a)));
+            self.map.insert(key, RefCell::new(a));
             return Ok(key);
         }
     }
diff --git a/crates/wasi-c2/src/virt/pipe.rs b/crates/wasi-c2/src/virt/pipe.rs
index cda5383dc5..2ae7edaedc 100644
--- a/crates/wasi-c2/src/virt/pipe.rs
+++ b/crates/wasi-c2/src/virt/pipe.rs
@@ -180,6 +180,9 @@ impl<R: Read> WasiFile for ReadPipe<R> {
     fn get_fdflags(&self) -> Result<FdFlags, Error> {
         todo!() // do later
     }
+    fn set_fdflags(&self, _fdflags: FdFlags) -> Result<(), Error> {
+        todo!()
+    }
     fn get_oflags(&self) -> Result<OFlags, Error> {
         todo!() // do later
     }
@@ -334,6 +337,9 @@ impl<W: Write> WasiFile for WritePipe<W> {
     fn get_fdflags(&self) -> Result<FdFlags, Error> {
         todo!()
     }
+    fn set_fdflags(&self, _fdflags: FdFlags) -> Result<(), Error> {
+        todo!()
+    }
     fn get_oflags(&self) -> Result<OFlags, Error> {
         todo!()
     }