From c57b8fbf43b6c5b7b592e8a4811001d259dd2a68 Mon Sep 17 00:00:00 2001
From: zetwhite <zetwhite@naver.com>
Date: Sun, 22 Aug 2021 18:10:53 +0900
Subject: [PATCH] Add os.nice

---
 vm/src/stdlib/os.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/vm/src/stdlib/os.rs b/vm/src/stdlib/os.rs
index ce3ec191c7..2fd9ce3629 100644
--- a/vm/src/stdlib/os.rs
+++ b/vm/src/stdlib/os.rs
@@ -2355,6 +2355,18 @@ mod posix {
         )
     }
 
+    #[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 get_inheritable(fd: RawFd, vm: &VirtualMachine) -> PyResult<bool> {
         use nix::fcntl::fcntl;