[PATCH 09/11] libports: improve error reporting in adjust_priority

[Justus Winter]

By using error instead of perror, the warning can be proprely
attributed to the process.

* libports/manage-multithread.c (adjust_priority): Use error instead
  of perror to print the warning.
---
 libports/manage-multithread.c |    6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/libports/manage-multithread.c b/libports/manage-multithread.c
index d034582..be08030 100644
--- a/libports/manage-multithread.c
+++ b/libports/manage-multithread.c
@@ -20,6 +20,7 @@
 
 #include "ports.h"
 #include <assert.h>
+#include <error.h>
 #include <stdio.h>
 #include <mach/message.h>
 #include <mach/thread_info.h>
@@ -82,10 +83,7 @@ out:
     mach_port_deallocate (mach_task_self (), pset_priv);
 
   if (err && err != EPERM)
-    {
-      errno = err;
-      perror ("unable to adjust libports thread priority");
-    }
+    error (0, err, "unable to adjust libports thread priority");
 }
 
 void
-- 
1.7.10.4