Index: run_check.c
===================================================================
RCS file: /usr/cvsroot/ossec-hids/src/syscheckd/run_check.c,v
retrieving revision 1.27
diff -u -r1.27 run_check.c
--- run_check.c	28 Mar 2007 02:53:58 -0000	1.27
+++ run_check.c	9 Aug 2007 18:41:34 -0000
@@ -10,6 +10,12 @@
  */
 
 
+/** SCHED_BATCH is Linux specific and is only picked up with _GNU_SOURCE **/
+#ifdef __linux__
+	#define _GNU_SOURCE
+	#include <sched.h>
+#endif
+
 #include "shared.h"
 #include "syscheck.h"
 #include "os_crypto/md5/md5_op.h"
@@ -89,6 +95,20 @@
     time_t prev_time_rk = 0;
     time_t prev_time_sk = 0;
     
+    /*
+     * SCHED_BATCH forces the kernel to assume this is a cpu intensive process
+     * and gives it a lower priority. This keeps ossec-syscheckd from reducing
+     * the interactity of an ssh session when checksumming large files.
+     * This is available in kernel flavors >= 2.6.16
+     */
+    #ifdef SCHED_BATCH
+      struct sched_param pri;
+      pri.sched_priority = 0;
+      int status = sched_setscheduler(0, SCHED_BATCH, &pri);
+      #ifdef DEBUG
+        verbose("%s: Setting SCHED_BATCH returned: %d", ARGV0, status);
+      #endif
+    #endif
             
     #ifdef DEBUG
     verbose("%s: Starting daemon ..",ARGV0);