Add os.nice

zetwhite · zetwhite · commit 2f08be590b84 · 2021-08-25T02:31:25.000+09:00
diff --git a/vm/src/stdlib/os.rs b/vm/src/stdlib/os.rs
@@ -776,6 +776,19 @@ mod _os {
         Ok(())
     }
 
+    #[cfg(unix)]
+    #[pyfunction]
+    fn nice(increment: i32, vm: &VirtualMachine) -> PyResult<i32> {
+        use nix::errno::{errno, Errno};
+        Errno::clear();
+        let res = unsafe { libc::nice(increment) };
+        if res == -1 && errno() != 0 {
+            Err(errno_err(vm))
+        } else {
+            Ok(res)
+        }
+    }
+
     #[pyfunction]
     fn readlink(path: PyPathLike, dir_fd: DirFd<0>, vm: &VirtualMachine) -> PyResult {
         let mode = path.mode;
