fix(ext/node): stat.mode on windows (#24434)

2 files changed, 57 insertions, 0 deletions

diff --git a/ext/fs/Cargo.toml b/ext/fs/Cargo.toml
index 05d4164af..2bd0212cf 100644
--- a/ext/fs/Cargo.toml
+++ b/ext/fs/Cargo.toml
@@ -34,4 +34,5 @@ nix.workspace = true
 
 [target.'cfg(windows)'.dependencies]
 winapi = { workspace = true, features = ["winbase"] }
+windows-sys.workspace = true
 junction.workspace = true
diff --git a/ext/fs/std_fs.rs b/ext/fs/std_fs.rs
index 7fc33a8ad..3cbd154d5 100644
--- a/ext/fs/std_fs.rs
+++ b/ext/fs/std_fs.rs
@@ -821,6 +821,29 @@ fn stat_extra(
     Ok(info.dwVolumeSerialNumber as u64)
   }
 
+  use windows_sys::Wdk::Storage::FileSystem::FILE_ALL_INFORMATION;
+
+  unsafe fn query_file_information(
+    handle: winapi::shared::ntdef::HANDLE,
+  ) -> std::io::Result<FILE_ALL_INFORMATION> {
+    use windows_sys::Wdk::Storage::FileSystem::NtQueryInformationFile;
+
+    let mut info = std::mem::MaybeUninit::<FILE_ALL_INFORMATION>::zeroed();
+    let status = NtQueryInformationFile(
+      handle as _,
+      std::ptr::null_mut(),
+      info.as_mut_ptr() as *mut _,
+      std::mem::size_of::<FILE_ALL_INFORMATION>() as _,
+      18, /* FileAllInformation */
+    );
+
+    if status < 0 {
+      return Err(std::io::Error::last_os_error());
+    }
+
+    Ok(info.assume_init())
+  }
+
   // SAFETY: winapi calls
   unsafe {
     let mut path: Vec<_> = path.as_os_str().encode_wide().collect();
@@ -842,6 +865,39 @@ fn stat_extra(
     CloseHandle(file_handle);
     fsstat.dev = result?;
 
+    if let Ok(file_info) = query_file_information(file_handle) {
+      if file_info.BasicInformation.FileAttributes
+        & winapi::um::winnt::FILE_ATTRIBUTE_REPARSE_POINT
+        != 0
+      {
+        fsstat.is_symlink = true;
+      }
+
+      if file_info.BasicInformation.FileAttributes
+        & winapi::um::winnt::FILE_ATTRIBUTE_DIRECTORY
+        != 0
+      {
+        fsstat.mode |= libc::S_IFDIR as u32;
+        fsstat.size = 0;
+      } else {
+        fsstat.mode |= libc::S_IFREG as u32;
+        fsstat.size = file_info.StandardInformation.EndOfFile as u64;
+      }
+
+      if file_info.BasicInformation.FileAttributes
+        & winapi::um::winnt::FILE_ATTRIBUTE_READONLY
+        != 0
+      {
+        fsstat.mode |=
+          (libc::S_IREAD | (libc::S_IREAD >> 3) | (libc::S_IREAD >> 6)) as u32;
+      } else {
+        fsstat.mode |= ((libc::S_IREAD | libc::S_IWRITE)
+          | ((libc::S_IREAD | libc::S_IWRITE) >> 3)
+          | ((libc::S_IREAD | libc::S_IWRITE) >> 6))
+          as u32;
+      }
+    }
+
     Ok(())
   }
 }