$OpenBSD: patch-src_file_convert_c,v 1.2 2009/03/06 20:44:24 ckuethe Exp $
--- src/file_convert.c.orig	Sat Jan 17 22:52:32 2009
+++ src/file_convert.c	Thu Feb 26 23:27:50 2009
@@ -33,6 +33,10 @@
 #   include <config.h>
 #endif
 
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/sysctl.h>
+#include <sys/wait.h>
 #include "display_itdb.h"
 #include "file_convert.h"
 #include "info.h"
@@ -44,9 +48,6 @@
 #include <glib/gstdio.h>
 #include <signal.h>
 #include <string.h>
-#include <sys/types.h>
-#include <sys/types.h>
-#include <sys/wait.h>
 #include <unistd.h>
 
 #undef DEBUG_CONV
@@ -645,6 +646,8 @@ static void conversion_prefs_changed (Conversion *conv
     gboolean background_transfer;
     gdouble maxsize;
     GList *gl;
+    int mib[2], ncpus;
+    size_t len;
 
     g_return_if_fail (conv);
 
@@ -666,13 +669,16 @@ static void conversion_prefs_changed (Conversion *conv
     }
 
     conv->max_threads_num = prefs_get_int (FILE_CONVERT_MAX_THREADS_NUM);
+    mib[0] = CTL_HW;
+    mib[1] = HW_NCPU;
+    len = sizeof(ncpus);
     if (conv->max_threads_num == 0)
     {   /* set to maximum available number of processors */
-	conv->max_threads_num = sysconf (_SC_NPROCESSORS_ONLN);
-	/* paranoia mode on */
-	if (conv->max_threads_num <= 0)
-	{
+	if ((sysctl(mib, 2, &ncpus, &len, NULL, 0) == -1) || (ncpus < 1)){
+	    /* paranoia mode on */
 	    conv->max_threads_num = 1;
+	} else {
+	    conv->max_threads_num = ncpus;
 	}
     }