diff --git a/library/std/src/sys/pal/yggdrasil/fs/file.rs b/library/std/src/sys/pal/yggdrasil/fs/file.rs
index 968e467c2ef..39d9d5f4a21 100644
--- a/library/std/src/sys/pal/yggdrasil/fs/file.rs
+++ b/library/std/src/sys/pal/yggdrasil/fs/file.rs
@@ -1,5 +1,5 @@
 use yggdrasil_rt::io::{
-    FileMetadataUpdate, FileMetadataUpdateMode, FileMode as OsFileMode,
+    FileMetadataUpdate, FileMetadataUpdateMode, FileMode as OsFileMode, FileSync, FileTimesUpdate,
     OpenOptions as OsOpenOptions, SeekFrom as OsSeekFrom,
 };
 
@@ -96,17 +96,17 @@ impl File {
     }
 
     pub fn fsync(&self) -> io::Result<()> {
-        crate::debug_trace!("TODO: fsync()");
-        Ok(())
+        unsafe {
+            cvt_io(yggdrasil_rt::sys::fsync(self.as_raw_fd(), FileSync::METADATA | FileSync::DATA))
+        }
     }
 
     pub fn datasync(&self) -> io::Result<()> {
-        crate::debug_trace!("TODO: datasync()");
-        Ok(())
+        unsafe { cvt_io(yggdrasil_rt::sys::fsync(self.as_raw_fd(), FileSync::DATA)) }
     }
 
-    pub fn truncate(&self, _size: u64) -> io::Result<()> {
-        todo!()
+    pub fn truncate(&self, size: u64) -> io::Result<()> {
+        unsafe { cvt_io(yggdrasil_rt::sys::truncate(self.as_raw_fd(), size)) }
     }
 
     pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
@@ -164,9 +164,18 @@ impl File {
         })
     }
 
-    pub fn set_times(&self, _times: FileTimes) -> io::Result<()> {
-        crate::debug_trace!("TODO: File::set_times()");
-        Ok(())
+    pub fn set_times(&self, times: FileTimes) -> io::Result<()> {
+        cvt_io(unsafe {
+            yggdrasil_rt::sys::update_metadata(
+                Some(self.as_raw_fd()),
+                "",
+                &FileMetadataUpdate::Times(FileTimesUpdate {
+                    atime: times.atime,
+                    mtime: times.mtime,
+                    ctime: None,
+                }),
+            )
+        })
     }
 }
 
diff --git a/library/std/src/sys/pal/yggdrasil/fs/mod.rs b/library/std/src/sys/pal/yggdrasil/fs/mod.rs
index 1a08834b4cb..a1a0ca13c95 100644
--- a/library/std/src/sys/pal/yggdrasil/fs/mod.rs
+++ b/library/std/src/sys/pal/yggdrasil/fs/mod.rs
@@ -1,6 +1,6 @@
 use yggdrasil_rt::io::{
-    FileAttr as OsFileAttr, FileMetadataUpdate, FileMetadataUpdateMode, FileMode as OsFileMode,
-    FileType as OsFileType, RawFd as OsRawFd, Rename,
+    AccessMode as OsAccessMode, FileAttr as OsFileAttr, FileMetadataUpdate, FileMetadataUpdateMode,
+    FileMode as OsFileMode, FileType as OsFileType, RawFd as OsRawFd, Rename,
 };
 use yggdrasil_rt::time::SystemTime as RtSystemTime;
 
@@ -9,7 +9,7 @@ use crate::os::yggdrasil::fs::{MetadataExt, OpenOptionsExt};
 use crate::path::{Path, PathBuf};
 use crate::sys::time::SystemTime;
 use crate::sys::{cvt_io, run_with_path_str};
-use crate::{fmt, io};
+use crate::{fmt, io, os};
 
 mod dir;
 mod file;
@@ -27,7 +27,10 @@ pub struct FilePermissions(OsFileMode);
 pub struct FileType(OsFileType);
 
 #[derive(Copy, Clone, Debug, Default)]
-pub struct FileTimes {}
+pub struct FileTimes {
+    atime: Option<RtSystemTime>,
+    mtime: Option<RtSystemTime>,
+}
 
 impl FileAttr {
     pub fn size(&self) -> u64 {
@@ -117,12 +120,12 @@ impl fmt::Debug for FileType {
 }
 
 impl FileTimes {
-    pub fn set_accessed(&mut self, _t: SystemTime) {
-        crate::debug_trace!("TODO: FileTimes::set_accessed()");
+    pub fn set_accessed(&mut self, t: SystemTime) {
+        self.atime = Some(t.0);
     }
 
-    pub fn set_modified(&mut self, _t: SystemTime) {
-        crate::debug_trace!("TODO: FileTimes::set_modified()");
+    pub fn set_modified(&mut self, t: SystemTime) {
+        self.mtime = Some(t.0);
     }
 }
 
@@ -176,12 +179,12 @@ pub fn readlink(path: &Path) -> io::Result<PathBuf> {
     Ok(PathBuf::from(path))
 }
 
-pub fn symlink(_original: &Path, _link: &Path) -> io::Result<()> {
-    todo!()
+pub fn symlink(original: &Path, link: &Path) -> io::Result<()> {
+    os::yggdrasil::fs::symlink(original, link)
 }
 
 pub fn link(_original: &Path, _link: &Path) -> io::Result<()> {
-    todo!()
+    Err(io::Error::new(io::ErrorKind::Uncategorized, "Hard links are not implemented"))
 }
 
 pub fn stat(path: &Path) -> io::Result<FileAttr> {
@@ -210,10 +213,9 @@ pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
     crate::io::copy(&mut src, &mut dst)
 }
 
-pub fn try_exists(_path: &Path) -> io::Result<bool> {
-    todo!()
-}
-
 pub fn exists(path: &Path) -> io::Result<bool> {
-    try_exists(path)
+    run_with_path_str(path, |path| {
+        cvt_io(unsafe { yggdrasil_rt::sys::check_access(None, path, OsAccessMode::empty()) })
+    })
+    .map(|_| true)
 }