Index: trunk/Ohana/src/opihi/pcontrol/run.c
===================================================================
--- trunk/Ohana/src/opihi/pcontrol/run.c	(revision 8424)
+++ trunk/Ohana/src/opihi/pcontrol/run.c	(revision 10693)
@@ -3,13 +3,54 @@
 int run (int argc, char **argv) {
 
-  if (argc != 1) {
-    gprint (GP_ERR, "USAGE: run\n");
+  RunLevels level;
+
+  if ((argc > 2) ||
+      get_argument (argc, argv, "help") ||
+      get_argument (argc, argv, "-h") ||
+      get_argument (argc, argv, "--help")) 
+  {
+    if (!strcmp (argv[0], "run")) {
+      gprint (GP_ERR, "USAGE: run [level]\n");
+      gprint (GP_ERR, "  allowed levels:\n");
+      gprint (GP_ERR, "  all (default) : manage machines, spawn jobs, harvest jobs\n");
+      gprint (GP_ERR, "  reap          : manage machines, harvest jobs\n");
+      gprint (GP_ERR, "  hosts         : manage machines, not jobs\n");
+      gprint (GP_ERR, "  none          : all stop\n");
+    } else {
+      gprint (GP_ERR, "USAGE: stop (immediate processing halt)\n");
+    }
+    return (FALSE);
+  }
+
+  level = PCONTROL_RUN_UNKNOWN;
+  if (argc == 1) {
+    if (!strcasecmp (argv[0], "run")) level = PCONTROL_RUN_ALL;
+    if (!strcasecmp (argv[0], "stop")) level = PCONTROL_RUN_NONE;
+  } else {
+    if (!strcasecmp (argv[1], "all")) level = PCONTROL_RUN_ALL;
+    if (!strcasecmp (argv[1], "reap")) level = PCONTROL_RUN_REAP;
+    if (!strcasecmp (argv[1], "host")) level = PCONTROL_RUN_HOSTS;
+    if (!strcasecmp (argv[1], "hosts")) level = PCONTROL_RUN_HOSTS;
+    if (!strcasecmp (argv[1], "none")) level = PCONTROL_RUN_NONE;
+  }
+
+  if (level == PCONTROL_RUN_UNKNOWN) {
+    gprint (GP_ERR, "  unknown run level %s\n", argv[1]);
+    gprint (GP_ERR, "  allowed levels:\n");
+    gprint (GP_ERR, "  all (default) : manage machines, spawn jobs, harvest jobs\n");
+    gprint (GP_ERR, "  reap          : manage machines, harvest jobs\n");
+    gprint (GP_ERR, "  hosts         : manage machines, not jobs\n");
+    gprint (GP_ERR, "  none          : all stop\n");
     return (FALSE);
   }
 
 # ifdef THREADED
-  SetRunSystem (TRUE);
+  SetRunLevel (level);
 # else
-  rl_event_hook = CheckSystem;
+  if (level == PCONTROL_RUN_NONE) {
+    rl_event_hook = NULL;
+  } else {
+    rl_event_hook = CheckSystem;
+  }
 # endif
 
@@ -17,2 +58,9 @@
 }
 
+/* 
+   run levels:
+   all (manage machines, spawn jobs, harvest jobs)
+   reap (manage machines, harvest jobs)
+   hosts (manage machines, not jobs)
+   none (all stop)
+*/