Added some user friendly output to the hostfile RDS component.

This is more of a usability feature, but a very useful one. So I 
suggest that it go into the release branches.

This commit was SVN r10153.

orte/mca/rds/hostfile/Makefile.am

@@ -19,6 +19,7 @@
 # Use the top-level Makefile.options
 
 
+dist_pkgdata_DATA = help-rds-hostfile.txt
 
 # Make the output library in this directory, and name it either
 # mca_<type>_<name>.la (for DSO builds) or libmca_<type>_<name>.la

orte/mca/rds/hostfile/help-rds-hostfile.txt

@@ -0,0 +1,54 @@
+# -*- text -*-
+#
+# Copyright (c) 2004-2006 The Trustees of Indiana University and Indiana
+#                         University Research and Technology
+#                         Corporation.  All rights reserved.
+# Copyright (c) 2004-2005 The University of Tennessee and The University
+#                         of Tennessee Research Foundation.  All rights
+#                         reserved.
+# Copyright (c) 2004-2005 High Performance Computing Center Stuttgart, 
+#                         University of Stuttgart.  All rights reserved.
+# Copyright (c) 2004-2005 The Regents of the University of California.
+#                         All rights reserved.
+# $COPYRIGHT$
+# 
+# Additional copyrights may follow
+# 
+# $HEADER$
+#
+# This is the US/English general help file for Open RTE's RDS component.
+#
+[rds:no-hostfile]
+Open RTE was unable to open the hostfile:
+    %s
+Check to make sure the path and filename are correct.
+[rds:slots]
+Open RTE detected a bad parameter in the hostfile:
+    %s
+The slots parameter is less than 0:
+    slots=%d
+[rds:max_slots]
+Open RTE detected a bad parameter in the hostfile:
+    %s
+The max_slots parameter is less than 0:
+    max_slots=%d
+[rds:max_slots_lt]
+Open RTE detected a bad parameter in the hostfile:
+    %s
+The max_slots parameter is less than the slots parameter:
+    slots=%d
+    max_slots=%d
+[rds:parse_error_string]
+Open RTE detected a parse error in the hostfile:
+    %s
+It occured on line number %d on token %d:
+    %s
+[rds:parse_error_int]
+Open RTE detected a parse error in the hostfile:
+    %s
+It occured on line number %d on token %d:
+    %d
+[rds:parse_error]
+Open RTE detected a parse error in the hostfile:
+    %s
+It occured on line number %d on token %d.

orte/mca/rds/hostfile/rds_hostfile.c

@@ -27,6 +27,8 @@
 #include "opal/util/argv.h"
 #include "opal/mca/mca.h"
 #include "opal/mca/base/base.h"
+#include "opal/util/show_help.h"
+
 #include "orte/orte_constants.h"
 #include "orte/util/sys_info.h"
 #include "orte/mca/ns/ns.h"
@@ -42,22 +44,34 @@
 
 static orte_cellid_t local_cellid;
 static bool need_cellid = true;
+static char *cur_hostfile_name = NULL;
 
 static void orte_rds_hostfile_parse_error(int token)
 {
     switch (token) {
     case ORTE_RDS_HOSTFILE_STRING:
-        opal_output(0, "Error reading hostfile at line %d: token:%d %s\n",
-            orte_rds_hostfile_line, token, orte_rds_hostfile_value.sval);
+        opal_show_help("help-rds-hostfile.txt", "rds:parse_error_string",
+                       true,
+                       cur_hostfile_name, 
+                       orte_rds_hostfile_line, 
+                       token, 
+                       orte_rds_hostfile_value.sval);
         break;
     case ORTE_RDS_HOSTFILE_IPV4:
     case ORTE_RDS_HOSTFILE_INT:
-        opal_output(0, "Error reading hostfile at line %d: token:%d %d\n",
-            orte_rds_hostfile_line, token, orte_rds_hostfile_value.ival);
+        opal_show_help("help-rds-hostfile.txt", "rds:parse_error_int",
+                       true,
+                       cur_hostfile_name, 
+                       orte_rds_hostfile_line, 
+                       token, 
+                       orte_rds_hostfile_value.ival);
         break;
      default:
-        opal_output(0, "Error reading hostfile at line %d token:%d\n",
-            orte_rds_hostfile_line, token);
+        opal_show_help("help-rds-hostfile.txt", "rds:parse_error",
+                       true,
+                       cur_hostfile_name, 
+                       orte_rds_hostfile_line, 
+                       token );
         break;
     }
 }
@@ -220,6 +234,9 @@ static int orte_rds_hostfile_parse_line(int token, opal_list_t* existing, opal_l
         case ORTE_RDS_HOSTFILE_SLOTS:
             rc = orte_rds_hostfile_parse_int();
             if (rc < 0) {
+                opal_show_help("help-rds-hostfile.txt", "rds:slots",
+                               true,
+                               cur_hostfile_name, rc);
                 OBJ_RELEASE(node);
                 return ORTE_ERROR;
             }
@@ -236,6 +253,9 @@ static int orte_rds_hostfile_parse_line(int token, opal_list_t* existing, opal_l
         case ORTE_RDS_HOSTFILE_SLOTS_MAX:
             rc = orte_rds_hostfile_parse_int();
             if (rc < 0) {
+                opal_show_help("help-rds-hostfile.txt", "rds:max_slots",
+                               true,
+                               cur_hostfile_name, ((size_t) rc));
                 OBJ_RELEASE(node);
                 return ORTE_ERROR;
             }
@@ -246,6 +266,9 @@ static int orte_rds_hostfile_parse_line(int token, opal_list_t* existing, opal_l
                     update = true;
                 }
             } else {
+                opal_show_help("help-rds-hostfile.txt", "rds:max_slots_lt",
+                               true,
+                               cur_hostfile_name, node->node_slots, rc);
                 ORTE_ERROR_LOG(ORTE_ERR_BAD_PARAM);
                 OBJ_RELEASE(node);
                 return ORTE_ERROR;
@@ -282,10 +305,15 @@ static int orte_rds_hostfile_parse(const char *hostfile, opal_list_t* existing,
     int rc = ORTE_SUCCESS;
 
     OPAL_LOCK(&mca_rds_hostfile_component.lock);
-
+    
+    cur_hostfile_name = strdup(hostfile);
+    
     orte_rds_hostfile_done = false;
     orte_rds_hostfile_in = fopen(hostfile, "r");
     if (NULL == orte_rds_hostfile_in) {
+        opal_show_help("help-rds-hostfile.txt", "rds:no-hostfile",
+                       true,
+                       cur_hostfile_name);
         rc = ORTE_ERR_NOT_FOUND;
         goto unlock;
     }
@@ -326,6 +354,11 @@ static int orte_rds_hostfile_parse(const char *hostfile, opal_list_t* existing,
     orte_rds_hostfile_in = NULL;
 
 unlock:
+    if(NULL != cur_hostfile_name) {
+        free(cur_hostfile_name);
+        cur_hostfile_name = NULL;
+    }
+
     OPAL_UNLOCK(&mca_rds_hostfile_component.lock);
     return rc;
 }