From 6e2f6b28454c56d262eb7b49ef7b41e65c6be43f Mon Sep 17 00:00:00 2001
From: David CARLIER <devnexen@gmail.com>
Date: Mon, 9 Aug 2021 21:56:12 +0100
Subject: [PATCH] nice little code simplification, included already in the libc
 for all unixes

---
 src/uu/nice/src/nice.rs | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/src/uu/nice/src/nice.rs b/src/uu/nice/src/nice.rs
index d5a4094d1..49efe32e0 100644
--- a/src/uu/nice/src/nice.rs
+++ b/src/uu/nice/src/nice.rs
@@ -10,21 +10,13 @@
 #[macro_use]
 extern crate uucore;
 
-use libc::{c_char, c_int, execvp};
+use libc::{c_char, c_int, execvp, PRIO_PROCESS};
 use std::ffi::CString;
 use std::io::Error;
 use std::ptr;
 
 use clap::{crate_version, App, AppSettings, Arg};
 
-// XXX: PRIO_PROCESS is 0 on at least FreeBSD and Linux.  Don't know about Mac OS X.
-const PRIO_PROCESS: c_int = 0;
-
-extern "C" {
-    fn getpriority(which: c_int, who: c_int) -> c_int;
-    fn setpriority(which: c_int, who: c_int, prio: c_int) -> c_int;
-}
-
 pub mod options {
     pub static ADJUSTMENT: &str = "adjustment";
     pub static COMMAND: &str = "COMMAND";
@@ -50,7 +42,7 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
 
     let mut niceness = unsafe {
         nix::errno::Errno::clear();
-        getpriority(PRIO_PROCESS, 0)
+        libc::getpriority(PRIO_PROCESS, 0)
     };
     if Error::last_os_error().raw_os_error().unwrap() != 0 {
         show_error!("getpriority: {}", Error::last_os_error());
@@ -84,7 +76,7 @@ pub fn uumain(args: impl uucore::Args) -> i32 {
     };
 
     niceness += adjustment;
-    if unsafe { setpriority(PRIO_PROCESS, 0, niceness) } == -1 {
+    if unsafe { libc::setpriority(PRIO_PROCESS, 0, niceness) } == -1 {
         show_warning!("setpriority: {}", Error::last_os_error());
     }