Add sync call

netcdf/src/file.rs

@@ -423,6 +423,17 @@ impl FileMut {
         let (ncid, name) = super::group::get_parent_ncid_and_stem(self.ncid(), name)?;
         super::variable::add_variable_from_identifiers(ncid, name, dims, T::NCTYPE)
     }
+
+    /// Flush pending buffers to disk to minimise data loss in case of termination.
+    ///
+    /// Note: When writing and reading from the same file from multiple processes
+    /// it is recommended to instead open the file in both the reader and
+    /// writer process with the [`Options::SHARE`] flag.
+    pub fn sync(&self) -> error::Result<()> {
+        error::checked(super::with_lock(|| unsafe {
+            netcdf_sys::nc_sync(self.ncid())
+        }))
+    }
 }
 
 #[cfg(feature = "has-mmap")]

netcdf/tests/lib.rs

@@ -1743,3 +1743,14 @@ fn ndarray_get_into() {
         .unwrap();
     assert_eq!(values, outarray.slice(s![0, .., .., ..]));
 }
+
+#[test]
+fn sync_file() {
+    let d = tempfile::tempdir().unwrap();
+    let path = d.path().join("sync_file.nc");
+
+    let mut f = netcdf::create(path).unwrap();
+
+    f.add_unlimited_dimension("t").unwrap();
+    f.sync().unwrap();
+}