--- dietlibc-0.28-unpatched/lib/__nice.c	2005-02-13 18:01:18.966469056 -0500
+++ dietlibc-0.28/lib/__nice.c	2005-02-13 18:17:04.381744088 -0500
@@ -1,9 +1,13 @@
 #include "syscalls.h"
-#include <sys/time.h>
+#include <errno.h>
 #include <sys/resource.h>
 
 #ifndef __NR_nice
 int nice(int i) {
-  return setpriority(PRIO_PROCESS,0,getpriority(PRIO_PROCESS,0)+i);
+  if (setpriority(PRIO_PROCESS,0,getpriority(PRIO_PROCESS,0)+i) == -1) {
+    errno=EPERM;
+    return -1;
+  }
+  return getpriority(PRIO_PROCESS,0);
 }
 #endif