From 8846e58f99cd0774ea00dbbecf0053d62403214d Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Tue, 25 Jan 2011 10:33:36 +0000
Subject: [PATCH] undo

---
 src/util/os_priority.c | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/src/util/os_priority.c b/src/util/os_priority.c
index 3993f572c..e9ca9deea 100644
--- a/src/util/os_priority.c
+++ b/src/util/os_priority.c
@@ -320,11 +320,32 @@ GNUNET_OS_set_process_priority (struct GNUNET_OS_Process *proc,
     SetPriorityClass (h, rprio);
   }
 #elif LINUX 
-  if (0 != setpriority (PRIO_PROCESS, proc->pid, rprio))
+  pid_t pid;
+
+  pid = proc->pid;
+  if ( (0 == pid) ||
+       (pid == getpid () ) )
     {
-      GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
-			   GNUNET_ERROR_TYPE_BULK, "setpriority");
-      return GNUNET_SYSERR;
+      int have = nice (0);
+      int delta = rprio - have;
+      errno = 0;
+      if ( (delta != 0) &&
+	   (rprio == nice (delta)) && 
+	   (errno != 0) )
+        {
+          GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
+                               GNUNET_ERROR_TYPE_BULK, "nice");
+          return GNUNET_SYSERR;
+        }
+    }
+  else
+    {
+      if (0 != setpriority (PRIO_PROCESS, pid, rprio))
+        {
+          GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING |
+                               GNUNET_ERROR_TYPE_BULK, "setpriority");
+          return GNUNET_SYSERR;
+        }
     }
 #else
   GNUNET_log (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
-- 
2.25.1