From 804e9c5a74a7de6a874070ec659cb8accb4db1bd Mon Sep 17 00:00:00 2001
From: Kern Sibbald <kern@sibbald.com>
Date: Sun, 1 Jun 2008 18:44:24 +0000
Subject: [PATCH] Optimize writing EOF on two tapes

git-svn-id: https://bacula.svn.sourceforge.net/svnroot/bacula/trunk@7087 91ce42f0-d328-0410-95d8-f526ca767f89
---
 regress/scripts/prepare-two-tapes.in | 47 ++++++++++++++++++----------
 1 file changed, 30 insertions(+), 17 deletions(-)

diff --git a/regress/scripts/prepare-two-tapes.in b/regress/scripts/prepare-two-tapes.in
index b937ea115e..65bcce823c 100755
--- a/regress/scripts/prepare-two-tapes.in
+++ b/regress/scripts/prepare-two-tapes.in
@@ -2,32 +2,45 @@
 #
 # Cleanup left over files -- both before and after test run
 #
+# Write an EOF on tape in slot $SLOT1  and  on tape in $SLOT2
 
 . scripts/functions
 
 scripts/cleanup
 
-if test x@autochanger@ != x/dev/null; then
-   slot=`bin/@changer_script@ @autochanger@ loaded 0 @tape_drive@ $DRIVE1`
-   if test "x${slot}" != "x$SLOT2"; then
-      bin/@changer_script@ @autochanger@ unload $slot @tape_drive@ $DRIVE1
-      bin/@changer_script@ @autochanger@ load $SLOT2 @tape_drive@ $DRIVE1
-   fi
-
-   init_drive @tape_drive@
-fi
-
-
 #
-# If we have an autochanger always load tape in slot 1
+# init first of two slots
+# optimize so we don't unnecessarily unload and load slots
 #
 if test x@autochanger@ != x/dev/null; then
    slot=`bin/@changer_script@ @autochanger@ loaded 0 @tape_drive@ $DRIVE1`
-   if test "x${slot}" != "x$SLOT1"; then
+   case $slot in
+   0)
+      bin/@changer_script@ @autochanger@ load $SLOT1 @tape_drive@ $DRIVE1
+      init_drive @tape_drive@
+      slot=$SLOT1
+      ;;
+   $SLOT1)
+      init_drive @tape_drive@
+      slot=$SLOT1
+      ;;
+   $SLOT2)
+      init_drive @tape_drive@
+      slot=$SLOT2
+      ;;
+  esac
+
+# init the other slot
+  case $slot in
+   $SLOT1)
+      bin/@changer_script@ @autochanger@ unload $slot @tape_drive@ $DRIVE1
+      bin/@changer_script@ @autochanger@ load $SLOT2 @tape_drive@ $DRIVE1
+      init_drive @tape_drive@
+      ;;
+   $SLOT2)
       bin/@changer_script@ @autochanger@ unload $slot @tape_drive@ $DRIVE1
       bin/@changer_script@ @autochanger@ load $SLOT1 @tape_drive@ $DRIVE1
-   fi
+      init_drive @tape_drive@
+      ;;
+   esac
 fi
-
-init_drive @tape_drive@
-
-- 
2.39.5