Index: trunk/ippTools/src/stacktool.c
===================================================================
--- trunk/ippTools/src/stacktool.c	(revision 34731)
+++ trunk/ippTools/src/stacktool.c	(revision 34800)
@@ -37,4 +37,5 @@
 static bool inputskyfileMode(pxConfig *config);
 static bool tosumMode(pxConfig *config);
+static bool tobkgMode(pxConfig *config);
 static bool addsumskyfileMode(pxConfig *config);
 static bool sumskyfileMode(pxConfig *config);
@@ -76,4 +77,5 @@
         MODECASE(STACKTOOL_MODE_INPUTSKYFILE,          inputskyfileMode);
         MODECASE(STACKTOOL_MODE_TOSUM,                 tosumMode);
+	MODECASE(STACKTOOL_MODE_TOBKG,                 tobkgMode);
         MODECASE(STACKTOOL_MODE_ADDSUMSKYFILE,         addsumskyfileMode);
         MODECASE(STACKTOOL_MODE_SUMSKYFILE,            sumskyfileMode);
@@ -952,4 +954,79 @@
         // negative simple so the default is true
         if (!ippdbPrintMetadatas(stdout, output, "stackSumSkyfile", !simple)) {
+            psError(PS_ERR_UNKNOWN, false, "failed to print array");
+            psFree(output);
+            return false;
+        }
+    }
+
+    psFree(output);
+
+    return true;
+}
+
+static bool tobkgMode(pxConfig *config)
+{
+    PS_ASSERT_PTR_NON_NULL(config, false);
+
+    psMetadata *where = psMetadataAlloc();
+    PXOPT_COPY_S64(config->args, where, "-stack_id", "stack_id", "==");
+    pxAddLabelSearchArgs (config, where, "-label", "stackRun.label", "==");
+
+    PXOPT_LOOKUP_U64(limit, config->args, "-limit", false, false);
+    PXOPT_LOOKUP_BOOL(simple, config->args, "-simple", false);
+
+    psString query = pxDataGet("stacktool_tobkg.sql");
+    if (!query) {
+        psError(PXTOOLS_ERR_SYS, false, "failed to retreive SQL statement");
+        return false;
+    }
+
+    psString whereClause = psStringCopy(""); // WHERE conditions to add
+    if (psListLength(where->list)) {
+        psString new = psDBGenerateWhereConditionSQL(where, NULL);
+        psStringAppend(&whereClause, "\nAND %s", new);
+        psFree(new);
+    }
+    psFree(where);
+
+    psStringAppend(&query, "\nORDER by priority DESC, stack_id");
+
+    // treat limit == 0 as "no limit"
+    if (limit) {
+        psString limitString = psDBGenerateLimitSQL(limit);
+        psStringAppend(&query, " %s", limitString);
+        psFree(limitString);
+    }
+
+    if (!p_psDBRunQueryF(config->dbh, query, whereClause)) {
+        psError(PS_ERR_UNKNOWN, false, "database error");
+        psFree(query);
+        return false;
+    }
+    psFree(query);
+
+    psArray *output = p_psDBFetchResult(config->dbh);
+    if (!output) {
+        psErrorCode err = psErrorCodeLast();
+        switch (err) {
+            case PS_ERR_DB_CLIENT:
+                psError(PXTOOLS_ERR_SYS, false, "database error");
+            case PS_ERR_DB_SERVER:
+                psError(PXTOOLS_ERR_PROG, false, "database error");
+            default:
+                psError(PXTOOLS_ERR_PROG, false, "unknown error");
+        }
+
+        return false;
+    }
+    if (!psArrayLength(output)) {
+        psTrace("stacktool", PS_LOG_INFO, "no rows found");
+        psFree(output);
+        return true;
+    }
+
+    if (psArrayLength(output)) {
+        // negative simple so the default is true
+        if (!ippdbPrintMetadatas(stdout, output, "stackBkgSkyfile", !simple)) {
             psError(PS_ERR_UNKNOWN, false, "failed to print array");
             psFree(output);
@@ -1681,12 +1758,26 @@
     PXOPT_LOOKUP_S16(fault, config->args, "-fault", true, false);
     PXOPT_LOOKUP_S16(quality, config->args, "-set_quality", false, false);
+    PXOPT_LOOKUP_S16(background_model, config->args, "-set_background_model", false, false);
 
     psMetadata *where = psMetadataAlloc();
     PXOPT_COPY_S64(config->args, where, "-stack_id",   "stack_id",   "==");
 
-    if (!pxSetFaultCode(config->dbh, "stackSumSkyfile", where, fault, quality)) {
+    if (background_model) {
+      psMetadata *values = psMetadataAlloc();
+      PXOPT_COPY_S16(config->args, values, "-set_background_model", "background_model", "==");
+      long rows = psDBUpdateRows(config->dbh,"stackSumSkyfile", where, values);
+      psFree(values);
+      if (!rows) {
+	// This maybe should rollback and error if rows != 1
+	psError(PS_ERR_UNKNOWN, true, "no rows changed");
+	return false;
+      }
+    }
+    else {    
+      if (!pxSetFaultCode(config->dbh, "stackSumSkyfile", where, fault, quality)) {
         psError(PS_ERR_UNKNOWN, false, "failed to set set fault flag");
         psFree (where);
         return false;
+      }
     }
     psFree (where);