Bring SWMR-related tools changes from revise_chunks to develop.

45 files changed, 3202 insertions, 1 deletions

diff --git a/hl/tools/CMakeLists.txt b/hl/tools/CMakeLists.txt
index 560b1f2..8384b59 100644
--- a/hl/tools/CMakeLists.txt
+++ b/hl/tools/CMakeLists.txt
@@ -2,3 +2,5 @@ cmake_minimum_required (VERSION 3.1.0)
 PROJECT (HDF5_HL_TOOLS C CXX)
 
 add_subdirectory (${HDF5_HL_TOOLS_SOURCE_DIR}/gif2h5 ${HDF5_HL_TOOLS_BINARY_DIR}/gif2h5)
+
+add_subdirectory (${HDF5_HL_TOOLS_SOURCE_DIR}/h5watch ${HDF5_HL_TOOLS_BINARY_DIR}/h5watch)
diff --git a/hl/tools/Makefile.am b/hl/tools/Makefile.am
index 5ef8a96..090c4a6 100644
--- a/hl/tools/Makefile.am
+++ b/hl/tools/Makefile.am
@@ -22,6 +22,6 @@
 include $(top_srcdir)/config/commence.am
 
 # All subdirectories
-SUBDIRS=gif2h5
+SUBDIRS=gif2h5 h5watch
 
 include $(top_srcdir)/config/conclude.am
diff --git a/hl/tools/h5watch/CMakeLists.txt b/hl/tools/h5watch/CMakeLists.txt
new file mode 100644
index 0000000..e3a7e9d
--- /dev/null
+++ b/hl/tools/h5watch/CMakeLists.txt
@@ -0,0 +1,59 @@
+cmake_minimum_required (VERSION 3.1.0)
+PROJECT (HDF5_HL_TOOLS_H5WATCH)
+
+#-----------------------------------------------------------------------------
+# Define Sources
+#-----------------------------------------------------------------------------
+set (H5WATCH_SOURCES
+    ${HDF5_HL_TOOLS_H5WATCH_SOURCE_DIR}/h5watch
+)
+
+#-- Add h5watch program
+INCLUDE_DIRECTORIES (${HDF5_TOOLS_DIR}/lib)
+INCLUDE_DIRECTORIES (${HDF5_HL_TOOLS_DIR}/src)
+INCLUDE_DIRECTORIES (${HDF5_HL_TOOLS_H5WATCH_SOURCE_DIR})
+
+add_executable (h5watch ${H5WATCH_SOURCES})
+TARGET_NAMING (h5watch STATIC)
+TARGET_C_PROPERTIES (h5watch STATIC " " " ")
+target_link_libraries (h5watch ${HDF5_HL_LIB_TARGET} ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+set_target_properties (h5watch PROPERTIES FOLDER tools/hl)
+
+if (BUILD_TESTING)
+  #-- Add swmr_check_compat_vfd program
+  set (hl_swmr_check_compat_vfd_SOURCES
+      ${HDF5_HL_TOOLS_H5WATCH_SOURCE_DIR}/swmr_check_compat_vfd.c
+  )
+  add_executable (hl_swmr_check_compat_vfd ${hl_swmr_check_compat_vfd_SOURCES})
+  TARGET_NAMING (hl_swmr_check_compat_vfd STATIC)
+  TARGET_C_PROPERTIES (hl_swmr_check_compat_vfd STATIC " " " ")
+  target_link_libraries (hl_swmr_check_compat_vfd ${HDF5_HL_LIB_TARGET} ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+  set_target_properties (hl_swmr_check_compat_vfd PROPERTIES FOLDER tools/hl)
+
+  #-- Add extend_dset program
+  set (extend_dset_SOURCES
+      ${HDF5_HL_TOOLS_H5WATCH_SOURCE_DIR}/extend_dset.c
+  )
+  add_executable (extend_dset ${extend_dset_SOURCES})
+  TARGET_NAMING (extend_dset STATIC)
+  TARGET_C_PROPERTIES (extend_dset STATIC " " " ")
+  target_link_libraries (extend_dset ${HDF5_HL_LIB_TARGET} ${HDF5_LIB_TARGET} ${HDF5_TOOLS_LIB_TARGET})
+  set_target_properties (extend_dset PROPERTIES FOLDER tools/hl)
+
+  add_executable (h5watchgentest ${HDF5_HL_TOOLS_H5WATCH_SOURCE_DIR}/h5watchgentest.c)
+  TARGET_NAMING (h5watchgentest STATIC)
+  TARGET_C_PROPERTIES (h5watchgentest STATIC " " " ")
+  target_link_libraries (h5watchgentest ${HDF5_HL_LIB_TARGET} ${HDF5_LIB_TARGET})
+  set_target_properties (h5watchgentest PROPERTIES FOLDER generator/tools/hl)
+
+  include (CMakeTests.cmake)
+endif (BUILD_TESTING)
+
+#-----------------------------------------------------------------------------
+# Add file(s) to CMake Install
+#-----------------------------------------------------------------------------
+install (
+    TARGETS
+        h5watch
+    RUNTIME DESTINATION ${HDF5_INSTALL_BIN_DIR} COMPONENT hltoolsapplications
+)
diff --git a/hl/tools/h5watch/CMakeTests.cmake b/hl/tools/h5watch/CMakeTests.cmake
new file mode 100644
index 0000000..3242a72
--- /dev/null
+++ b/hl/tools/h5watch/CMakeTests.cmake
@@ -0,0 +1,191 @@
+
+##############################################################################
+##############################################################################
+###           T E S T I N G                                                ###
+##############################################################################
+##############################################################################
+
+set (H5WATCH_TEST_FILES
+    w-help1.ddl
+    w-err-cmpd1.ddl
+    w-err-cmpd2.ddl
+    w-err-cmpd3.ddl
+    w-err-cmpd4.ddl
+    w-err-cmpd5.ddl
+    w-err-dset1.ddl
+    w-err-dset2.ddl
+    w-err-dset-nomax.ddl
+    w-err-dset-none.ddl
+    w-err-file.ddl
+    w-err-poll.ddl
+    w-err-poll0.ddl
+    w-err-width.ddl
+    w-ext-cmpd.ddl
+    w-ext-cmpd-esc.ddl
+    w-ext-cmpd-esc-f1.ddl
+    w-ext-cmpd-esc-f3.ddl
+    w-ext-cmpd-esc-ff2.ddl
+    w-ext-cmpd-f1.ddl
+    w-ext-cmpd-f2.ddl
+    w-ext-cmpd-ff3.ddl
+    w-ext-cmpd-label.ddl
+    w-ext-cmpd-two.ddl
+    w-ext-cmpd-two-f1.ddl
+    w-ext-cmpd-two-f3.ddl
+    w-ext-cmpd-two-ff2.ddl
+    w-ext-early.ddl
+    w-ext-late.ddl
+    w-ext-one.ddl
+    w-ext-one-d.ddl
+    w-ext-one-simple.ddl
+    w-ext-two.ddl
+    w-ext-two-d.ddl
+    w-ext-two-width.ddl
+)
+
+# make test dir
+file (MAKE_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
+add_custom_target(h5watch-files ALL COMMENT "Copying files needed by h5watch tests")
+
+foreach (h5watch_file ${H5WATCH_TEST_FILES})
+  set (dest "${PROJECT_BINARY_DIR}/testfiles/${h5watch_file}")
+  #message (STATUS " Copying ${h5watch_file}")
+  add_custom_command (
+      TARGET     h5watch-files
+      POST_BUILD
+      COMMAND    ${CMAKE_COMMAND}
+      ARGS       -E copy_if_different ${HDF5_HL_TOOLS_DIR}/testfiles/${h5watch_file} ${dest}
+  )
+endforeach (h5watch_file ${H5WATCH_TEST_FILES})
+
+##############################################################################
+##############################################################################
+###           T H E   T E S T S  M A C R O S                               ###
+##############################################################################
+##############################################################################
+
+  MACRO (ADD_H5_TEST resultfile resultcode)
+    if (NOT HDF5_ENABLE_USING_MEMCHECKER)
+      add_test (
+          NAME H5WATCH_ARGS-${resultfile}-clear-objects
+          COMMAND    ${CMAKE_COMMAND}
+              -E remove
+                  ${resultfile}.out
+                  ${resultfile}.out.err
+      )
+      set_tests_properties (H5WATCH_ARGS-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
+      if (NOT "${last_test}" STREQUAL "")
+        set_tests_properties (H5WATCH_ARGS-${resultfile}-clear-objects PROPERTIES DEPENDS ${last_test})
+      endif (NOT "${last_test}" STREQUAL "")
+      set (last_test "H5WATCH_ARGS-${resultfile}-clearall-objects")
+      add_test (
+          NAME H5WATCH_ARGS-h5watch-${resultfile}
+          COMMAND "${CMAKE_COMMAND}"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch>"
+              -D "TEST_ARGS:STRING=${ARGN}"
+              -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
+              -D "TEST_OUTPUT=${resultfile}.out"
+              -D "TEST_EXPECT=${resultcode}"
+              -D "TEST_REFERENCE=${resultfile}.ddl"
+              -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
+      )
+      set_tests_properties (H5WATCH_ARGS-h5watch-${resultfile} PROPERTIES DEPENDS H5WATCH_ARGS-${resultfile}-clear-objects)
+      set (last_test "H5WATCH_ARGS-${resultfile}")
+    endif (NOT HDF5_ENABLE_USING_MEMCHECKER)
+  ENDMACRO (ADD_H5_TEST resultfile resultcode resultoption)
+
+  MACRO (ADD_H5_WATCH resultfile resultcode)
+    if (NOT HDF5_ENABLE_USING_MEMCHECKER)
+      add_test (
+          NAME H5WATCH-${resultfile}-clear-objects
+          COMMAND    ${CMAKE_COMMAND}
+              -E remove
+                  ${resultfile}.h5
+                  ${resultfile}.out
+                  ${resultfile}.out.err
+      )
+      set_tests_properties (H5WATCH-${resultfile}-clear-objects PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
+      add_test (
+          NAME H5WATCH-${resultfile}
+          COMMAND "${CMAKE_COMMAND}"
+              -D "TEST_PROGRAM=$<TARGET_FILE:h5watch>"
+              -D "TEST_ARGS:STRING=${ARGN}"
+              -D "TEST_FOLDER=${PROJECT_BINARY_DIR}/testfiles"
+              -D "TEST_OUTPUT=${resultfile}.out"
+              -D "TEST_EXPECT=${resultcode}"
+              -D "TEST_REFERENCE=${resultfile}.txt"
+              -P "${HDF_RESOURCES_EXT_DIR}/runTest.cmake"
+      )
+      set_tests_properties (H5WATCH-${resultfile} PROPERTIES DEPENDS H5WATCH-${resultfile}-clear-objects)
+    endif (NOTHDF5_ENABLE_USING_MEMCHECKER)
+  ENDMACRO (ADD_H5_WATCH resultfile resultcode)
+
+##############################################################################
+##############################################################################
+###           T H E   T E S T S                                            ###
+##############################################################################
+##############################################################################
+
+# Check to see if the VFD specified by the HDF5_DRIVER environment variable
+# supports SWMR.
+set (SWMR_INCOMPAT ${hl_swmr_check_compat_vfd})
+
+IF (NOT SWMR_INCOMPAT)
+# Remove any output file left over from previous test run
+  add_test (
+    NAME H5WATCH-clearall-objects
+    COMMAND    ${CMAKE_COMMAND}
+        -E remove
+        WATCH.h5
+  )
+  if (NOT "${last_test}" STREQUAL "")
+    set_tests_properties (H5WATCH-clearall-objects PROPERTIES DEPENDS ${last_test})
+  endif (NOT "${last_test}" STREQUAL "")
+  set (last_test "H5WATCH-clearall-objects")
+
+#################################################################################################
+#                                               #
+# WATCH.h5: file with various types of datasets for testing--                   #
+#   The following datasets are chunked, H5D_ALLOC_TIME_INCR, max. dimensional setting:      #
+#       DSET_ONE: one-dimensional dataset                           #
+#       DSET_TWO: two-dimensional dataset                           #
+#       DSET_CMPD: one-dimensional dataset with compound type                   #
+#       DSET_CMPD_ESC: one-dimensional dataset with compound type & escape/separator characters #
+#       DSET_CMPD_TWO: two-dimensional dataset with compound type               #
+#                                               #
+#   The following datasets are one-dimensional, chunked, max. dimension setting:        #
+#       DSET_ALLOC_EARLY: dataset with H5D_ALLOC_TIME_EARLY                 #
+#       DSET_ALLOC_LATE: dataset H5D_ALLOC_TIME_LATE                        #
+#                                               #
+#   The following datasets are one-dimensional:                         #
+#   DSET_NONE: fixed dimension setting, contiguous, H5D_ALLOC_TIME_LATE         #
+#   DSET_NOMAX: fixed dimension setting, chunked, H5D_ALLOC_TIME_INCR           #
+#                                               #
+#################################################################################################
+# create the output files to be used.
+  add_test (NAME H5WATCH-h5watchgentest COMMAND $<TARGET_FILE:h5watchgentest>)
+  set_tests_properties (H5WATCH-h5watchgentest PROPERTIES WORKING_DIRECTORY "${PROJECT_BINARY_DIR}/testfiles")
+  set_tests_properties (H5WATCH-h5watchgentest PROPERTIES DEPENDS "H5WATCH-clearall-objects")
+  set (last_test "H5WATCH-h5watchgentest")
+
+# Test on --help options
+  ADD_H5_TEST(w-help1 0 --help)
+#
+# Tests on expected failures
+  ADD_H5_TEST(w-err-dset1 1 WATCH.h5)
+  ADD_H5_TEST(w-err-dset2 1 WATCH.h5/group/DSET_CMPD)
+  ADD_H5_TEST(w-err-dset-none 1 WATCH.h5/DSET_NONE)
+  ADD_H5_TEST(w-err-dset-nomax 1 WATCH.h5/DSET_NOMAX)
+  ADD_H5_TEST(w-err-file 1 ../WATCH.h5/DSET_CMPD)
+  ADD_H5_TEST(w-err-width 1 --width=-8 WATCH.h5/DSET_ONE)
+  ADD_H5_TEST(w-err-poll 1 --polling=-8 WATCH.h5/DSET_ONE)
+  ADD_H5_TEST(w-err-poll0 1 --polling=0 WATCH.h5/DSET_ONE)
+#
+# Tests on invalid field names via --fields option for a compound typed dataset: DSET_CMPD
+  ADD_H5_TEST(w-err-cmpd1 1 --fields=fieldx WATCH.h5/DSET_CMPD)
+  ADD_H5_TEST(w-err-cmpd2 1 --fields=field1,field2. WATCH.h5/DSET_CMPD)
+  ADD_H5_TEST(w-err-cmpd3 1 --fields=field1,field2, WATCH.h5/DSET_CMPD)
+  ADD_H5_TEST(w-err-cmpd4 1 --fields=field1,field2.b.k WATCH.h5/DSET_CMPD)
+  ADD_H5_TEST(w-err-cmpd5 1 --fields=field1 --fields=field2.b.k WATCH.h5/DSET_CMPD)
+#
+ENDIF (NOT SWMR_INCOMPAT)
diff --git a/hl/tools/h5watch/Makefile.am b/hl/tools/h5watch/Makefile.am
new file mode 100644
index 0000000..a5891ef
--- /dev/null
+++ b/hl/tools/h5watch/Makefile.am
@@ -0,0 +1,44 @@
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+##
+## Makefile.am
+## Run automake to generate a Makefile.in from this file.
+#
+# HDF5 Library Makefile(.in)
+#
+
+include $(top_srcdir)/config/commence.am
+
+# Include src and tools/lib directories
+AM_CPPFLAGS+=-I$(top_srcdir)/src -I$(top_srcdir)/tools/lib -I$(top_srcdir)/hl/src
+
+# These are our main targets, the tools
+TEST_SCRIPT=testh5watch.sh
+check_SCRIPTS=$(TEST_SCRIPT)
+SCRIPT_DEPEND=swmr_check_compat_vfd$(EXEEXT) extend_dset$(EXEEXT) h5watch$(EXEEXT)
+
+bin_PROGRAMS=h5watch
+noinst_PROGRAMS=swmr_check_compat_vfd h5watchgentest extend_dset
+
+# Add h5watch specific linker flags here
+h5watch_LDFLAGS = $(LT_STATIC_EXEC) $(AM_LDFLAGS)
+
+# Programs all depend on the hdf5 library, the tools library, and the HL
+# library.
+LDADD=$(LIBH5_HL) $(LIBH5TOOLS) $(LIBHDF5)
+#
+CHECK_CLEANFILES+=*.h5
+DISTCLEANFILES=testh5watch.sh
+
+include $(top_srcdir)/config/conclude.am
diff --git a/hl/tools/h5watch/extend_dset.c b/hl/tools/h5watch/extend_dset.c
new file mode 100644
index 0000000..023e201
--- /dev/null
+++ b/hl/tools/h5watch/extend_dset.c
@@ -0,0 +1,518 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "H5HLprivate2.h"
+
+/*
+ * Extending datasets in WATCH.h5 generated by h5watchgentest.c
+ */
+#define DSET_ONE "DSET_ONE"
+#define DSET_TWO "DSET_TWO"
+#define DSET_CMPD "DSET_CMPD"
+#define DSET_CMPD_ESC "DSET_CMPD_ESC"
+#define DSET_CMPD_TWO "DSET_CMPD_TWO"
+#define DSET_ALLOC_LATE "DSET_ALLOC_LATE"
+#define DSET_ALLOC_EARLY "DSET_ALLOC_EARLY"
+
+/* The message sent by this process (extend_dset) to the test script to start "h5watch" */
+#define WRITER_MESSAGE  "writer_message"
+/* The message received from the test script to start extending dataset */
+#define READER_MESSAGE  "reader_message"
+/* Message timeout in seconds */
+#define MESSAGE_TIMEOUT 300
+
+/* Size of data buffer */
+#define TEST_BUF_SIZE 100
+
+/* 
+ * Test variations (incremental) for one-dimensional dataset:
+ * 	Varies from 10->13->12->12->1->3
+ */
+#define ONE_NTESTS	5
+int one_tests[ONE_NTESTS] = {3, -1, 0, -11, 2};
+
+/* 
+ * Test variations (incremental) for two-dimensional dataset:
+ *	Varies from {4,10}->{6,12}->{8,1}->{10,1}->
+ *	       	      	    {3,3}->{2,2}->{1,2}->
+ *		            {1,4}->{1,3}->{1,3}
+ */
+#define TWO_NTESTS  9
+int two_tests[TWO_NTESTS][2] = { {2, 2}, {2, -11}, {2, 0},
+                                 {-7, 2}, {-1, -1}, {-1, 0},
+                                 {0, 2}, {0, -1}, {0, 0}   
+			       };
+
+static herr_t extend_dset_two(const char *file, char *dname);
+static herr_t extend_dset_one(const char *file, char *dname);
+void send_message(const char *file);
+static herr_t wait_message(const char *file);
+
+
+/* Data structures for datasets with compound data type */
+typedef struct sub22_t {
+    unsigned int a;
+    unsigned int b;
+    unsigned int c;
+} sub22_t;
+
+typedef struct sub2_t {
+    unsigned int a;
+    sub22_t b;
+    unsigned int c;
+} sub2_t;
+
+typedef struct sub4_t {
+    unsigned int a;
+    unsigned int b;
+} sub4_t;
+
+typedef struct set_t {
+    unsigned int field1;
+    sub2_t field2;
+    double field3;
+    sub4_t field4;
+} set_t;
+
+/*
+ * To send a message by creating the file.
+ */
+void
+send_message(const char *file)
+{
+    FILE *id;
+
+    id = HDfopen(file, "w+");
+    HDfclose(id);
+} /* end send_message() */
+
+/*
+ *
+ * Repeatedly check for the message file.
+ * It will stop when the file exists or exceeds the timeout limit.
+ */
+static herr_t
+wait_message(const char *file)
+{
+    FILE *id;           /* File pointer */
+    time_t t0, t1;      /* Time info */
+
+    /* Start timer */
+    HDtime(&t0);
+
+    /* Wait for message from test script to start work */
+    while((id = HDfopen(file, "r")) == NULL) {
+        /* Get current time */
+        HDtime(&t1);
+        /*
+         * Determine time difference--
+         *   if waiting too long for the message, then it is
+         *   unlikely the message will get sent, then fail rather
+         *   than loop forever.
+         */
+        if(HDdifftime(t1, t0) > MESSAGE_TIMEOUT)
+            goto error;
+    } /* end while */
+
+    HDfclose(id);
+    HDunlink(file);
+
+    return SUCCEED;
+
+error:
+    return FAIL;
+} /* end wait_message() */
+
+/*
+ ***********************************************************************
+ *
+ * Extending a two-dimensional dataset:
+ *		  	dims[0]         dims[1]
+ *                      -------         -------
+ *      case #1:        increase        increase
+ *      case #2:        increase        decrease
+ *      case #3:        increase        same
+ *      case #4:        decrease        increase
+ *      case #5:        decrease        decrease        (no action)
+ *      case #6:        decrease        same            (no action)
+ *      case #7:        same            increase
+ *      case #8:        same            decrease        (no action)
+ *      case #9:        same            same            (no action)
+ *
+ *	two_tests[TWO_NTESTS][2] = { {2,2}, {2,-11}, {2,0},
+ *                                   {-7,2}, {-1,-1}, {-1,0},
+ *                                   {0,2}, {0,-1}, {0,0} }
+ *	varies from {4,10}->{6,12}->{8,1}->{10,1}->
+ *	       	      	    {3,3}->{2,2}->{1,2}->
+ *		            {1,4}->{1,3}->{1,3}
+ ***********************************************************************
+ */
+static herr_t
+extend_dset_two(const char *file, char *dname)
+{
+    hid_t fid = -1;         /* file id                                          */
+    hid_t fapl = -1;        /* file access property list id                     */
+    hid_t did = -1;         /* dataset id                                       */
+    hid_t sid = -1;         /* dataspace id                                     */
+    hid_t dtid = -1;        /* dataset's datatype id                            */
+    int ndims;              /* # of dimension sizes                             */
+    unsigned i, j;          /* local index variable                             */
+    hsize_t ext_dims[2];    /* new dimension sizes after extension              */
+    hsize_t cur_dims[2];    /* current dimension sizes                          */
+    size_t dtype_size;      /* size of the dataset's datatype                   */
+    unsigned num_elmts;     /* number of elements in the dataset                */
+    int *ibuf = NULL;       /* buffer for storing retrieved elements (integer)  */
+    set_t *cbuf = NULL;     /* buffer for storing retrieved elemnets (compound) */
+
+    /* Allocate memory */
+    if(NULL == (ibuf = (int *)HDcalloc(TEST_BUF_SIZE, sizeof(int))))
+        goto error;
+    if(NULL == (cbuf = (set_t *)HDcalloc(TEST_BUF_SIZE, sizeof(set_t))))
+        goto error;
+
+    /* Create a copy of file access property list */
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
+        goto error;
+
+    /* Set to use the latest library format */
+    if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+        goto error;
+
+    /* Open the file and dataset with SWMR write */
+    if((fid = H5Fopen(file, H5F_ACC_RDWR|H5F_ACC_SWMR_WRITE, fapl)) < 0)
+        goto error;
+
+    if((did = H5Dopen2(fid, dname, H5P_DEFAULT)) < 0)
+        goto error;
+
+    /* Send message to the test script to start "h5watch" */
+    send_message(WRITER_MESSAGE);
+
+    if((sid = H5Dget_space(did)) < 0)
+        goto error;
+
+    if((ndims = H5Sget_simple_extent_ndims(sid)) < 0)
+        goto error;
+
+    /* Get the size of the dataset's datatype */
+    if((dtype_size = H5LDget_dset_type_size(did, NULL)) == 0)
+        goto error;
+
+    /* Get the dataset's data type */
+    if((dtid = H5Tget_native_type(H5Dget_type(did), H5T_DIR_DEFAULT)) < 0)
+        goto error;
+
+    /* Wait for message from the test script to start extending dataset */
+    if(wait_message(READER_MESSAGE) < 0)
+        goto error;
+
+    /* Loop through different variations of extending the dataset */
+    for(i = 0; i < TWO_NTESTS; i++) {
+
+        /* sleep to emulate about 2 seconds of application operation */
+        HDsleep(2);
+
+        /* Get current dimension sizes */ 
+        if(H5LDget_dset_dims(did, cur_dims) < 0)
+            goto error;
+
+        /* Set up the new extended dimension sizes  */
+        ext_dims[0] = cur_dims[0] + (hsize_t)two_tests[i][0];
+        ext_dims[1] = cur_dims[1] + (hsize_t)two_tests[i][1];
+
+        /* Extend the dataset */
+        if(H5Dset_extent(did, ext_dims) < 0)
+            goto error;
+
+        num_elmts = 1;
+        for(j = 0; j < (unsigned)ndims; j++)
+            num_elmts *= (unsigned)ext_dims[j];
+	
+        /* Compound type */
+        if(!HDstrcmp(dname, DSET_CMPD_TWO)) {
+
+            HDmemset(cbuf, 0, TEST_BUF_SIZE * sizeof(set_t));
+            for(j = 0; j < num_elmts; j++) {
+                cbuf[j].field1 = i + 1;
+                cbuf[j].field2.a = i + 1;
+                cbuf[j].field2.c = i + 1;
+                cbuf[j].field2.b.a = i + 1;
+                cbuf[j].field2.b.b = i + 1;
+                cbuf[j].field2.b.c = i + 1;
+                cbuf[j].field3 = i + 1;
+                cbuf[j].field4.a = i + 1;
+                cbuf[j].field4.b = i + 1;
+            } /* end for */
+
+            /* Write to the dataset */
+            if(H5Dwrite(did, dtid, H5S_ALL, H5S_ALL, H5P_DEFAULT, cbuf) < 0)
+                goto error;
+        } else { /* Integer type */
+            HDmemset(ibuf, 0, TEST_BUF_SIZE * sizeof(int));
+            for(j = 0; j < num_elmts; j++)
+                ibuf[j] = (int)(i + 1);
+
+            /* Write to the dataset */
+            if(H5Dwrite(did, dtid, H5S_ALL, H5S_ALL, H5P_DEFAULT, ibuf) < 0)
+                goto error;
+        } /* end if-else */
+
+        if(H5Dflush(did) < 0)
+            goto error;
+
+    } /* end for TWO_NTESTS */
+
+    /* Closing */
+    if(H5Tclose(dtid) < 0) goto error;
+    if(H5Dclose(did) < 0) goto error;
+    if(H5Pclose(fapl) < 0) goto error;
+    if(H5Fclose(fid) < 0) goto error;
+
+    HDfree(ibuf);
+    HDfree(cbuf);
+
+    return SUCCEED;
+
+error:
+    H5E_BEGIN_TRY
+        H5Tclose(dtid);
+        H5Dclose(did);
+        H5Pclose(fapl);
+        H5Fclose(fid);
+    H5E_END_TRY
+
+    if(ibuf)
+        HDfree(ibuf);
+    if(cbuf)
+        HDfree(cbuf);
+
+    return FAIL;
+
+} /* end extend_dset_two() */
+
+/*
+ ***********************************************************************
+ *
+ * Extending a one-dimensional dataset
+ *	Test cases: 
+ *		#1: increase 
+ *		#2: decrease
+ *		#3: same
+ *		#4: decrease
+ *		#5: increase
+ *
+ * 	one_tests[ONE_NTESTS] = {3, -1, 0, -11, 2}
+ * 	varies from 10->13->12->12->1->3
+ *
+ ***********************************************************************
+ */
+static herr_t
+extend_dset_one(const char *file, char *dname)
+{
+    hid_t fid = -1;         /* file id                                          */
+    hid_t fapl = -1;        /* file access property list id                     */
+    hid_t did = -1;         /* dataset id                                       */
+    hid_t dtid = -1;        /* dataset's datatype id                            */
+    hid_t sid = -1;         /* dataspace id                                     */
+    hid_t mid = -1;         /* memory space id                                  */
+    unsigned i, j;          /* local index variable                             */
+    hsize_t cur_dims[1];    /* current dimension sizes                          */
+    hsize_t ext_dims[1];    /* new dimension sizes after extension              */
+    hsize_t offset[1];      /* starting offsets of appended data                */
+    hsize_t count[1];       /* dimension sizes of appended data                 */
+    size_t dtype_size;      /* size of the dataset's datatype                   */
+    int *ibuf = NULL;       /* buffer for storing retrieved elements (integer)  */
+    set_t *cbuf = NULL;     /* buffer for storing retrieved elemnets (compound) */
+
+    /* Allocate memory */
+    if(NULL == (ibuf = (int *)HDcalloc(TEST_BUF_SIZE, sizeof(int))))
+        goto error;
+    if(NULL == (cbuf = (set_t *)HDcalloc(TEST_BUF_SIZE, sizeof(set_t))))
+        goto error;
+
+    /* Create a copy of file access property list */
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
+        goto error;
+
+    /* Set to use the latest library format */
+    if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+        goto error;
+
+    /* Open the file and dataset with SWMR write */
+    if((fid = H5Fopen(file, H5F_ACC_RDWR|H5F_ACC_SWMR_WRITE, fapl)) < 0)
+        goto error;
+
+    /* Send message to the test script to start "h5watch" */
+    send_message(WRITER_MESSAGE);
+
+    if((did = H5Dopen2(fid, dname, H5P_DEFAULT)) < 0)
+        goto error;
+
+    /* Get size of the dataset's datatype */
+    if((dtype_size = H5LDget_dset_type_size(did, NULL)) == 0)
+        goto error;
+
+    /* Get dataset's datatype */
+    if((dtid = H5Tget_native_type(H5Dget_type(did), H5T_DIR_DEFAULT)) < 0)
+        goto error;
+
+    /* Wait for message from the test script to start extending dataset */
+    if(wait_message(READER_MESSAGE) < 0)
+        goto error;
+
+    /* Loop through different variations of extending the dataset */
+    for(i = 0; i < ONE_NTESTS; i++) {
+
+        /* sleep to emulate about 2 seconds of application operation */
+        HDsleep(2);
+
+        /* Get current dimension sizes */
+        if(H5LDget_dset_dims(did, cur_dims) < 0)
+            goto error;
+
+        /* Set up the new extended dimension sizes  */
+        ext_dims[0] = cur_dims[0] + (hsize_t)one_tests[i];
+
+        /* Extend the dataset */
+        if(H5Dset_extent(did, ext_dims) < 0)
+            goto error;
+
+        /* Write to the new appended region of the dataset */
+        if(one_tests[i] > 0) {
+
+            /* Select the extended region */
+            offset[0] = cur_dims[0];
+            count[0] = (hsize_t)one_tests[i];
+            if((sid = H5Dget_space(did)) < 0)
+                goto error;
+            if(H5Sselect_hyperslab(sid, H5S_SELECT_SET, offset, NULL, count, NULL) < 0)
+                goto error;
+
+            /* Set up memory space and get dataset's datatype */
+            if((mid = H5Screate_simple(1, count, NULL)) < 0)
+                goto error;
+
+            /* Initialize data for the extended region of the dataset */
+            /* Compound type */
+            if(!HDstrcmp(dname, DSET_CMPD) || !HDstrcmp(dname, DSET_CMPD_ESC)) {
+
+                HDmemset(cbuf, 0, TEST_BUF_SIZE * sizeof(set_t));
+                for(j = 0; j < (unsigned)one_tests[i]; j++) {
+                    cbuf[j].field1 = j + 1;
+                    cbuf[j].field2.a = j + 2;
+                    cbuf[j].field2.b.a = j + 2;
+                    cbuf[j].field2.b.b = j + 2;
+                    cbuf[j].field2.b.c = j + 2;
+                    cbuf[j].field2.c = j + 2;
+
+                    cbuf[j].field3 = j + 3;
+
+                    cbuf[j].field4.a = j + 4;
+                    cbuf[j].field4.b = j + 4;
+                } /* end for */
+
+                /* Write to the extended region of the dataset */
+                if(H5Dwrite(did, dtid, mid, sid, H5P_DEFAULT, cbuf) < 0)
+                    goto error;
+            } else { /* Integer type */
+
+                HDmemset(ibuf, 0, TEST_BUF_SIZE * sizeof(int));
+                for(j = 0; j < (unsigned)one_tests[i]; j++)
+                    ibuf[j] = (int)j;
+
+                /* Write to the extended region of the dataset */
+                if(H5Dwrite(did, dtid, mid, sid, H5P_DEFAULT, ibuf) < 0)
+                    goto error;
+            } /* end if-else */
+
+            /* Closing */
+            if(H5Sclose(sid) < 0) goto error;
+            if(H5Sclose(mid) < 0) goto error;
+        } /* end if */
+
+        if(H5Dflush(did) < 0)
+            goto error;
+
+    } /* end for ONE_NTESTS */
+
+    /* Closing */
+    if(H5Tclose(dtid) < 0) goto error;
+    if(H5Dclose(did) < 0) goto error;
+    if(H5Pclose(fapl) < 0) goto error;
+    if(H5Fclose(fid) < 0) goto error;
+
+    HDfree(ibuf);
+    HDfree(cbuf);
+
+    return SUCCEED;
+
+error:
+    H5E_BEGIN_TRY
+        H5Sclose(sid);
+        H5Sclose(mid);
+        H5Tclose(dtid);
+        H5Dclose(did);
+        H5Pclose(fapl);
+        H5Fclose(fid);
+    H5E_END_TRY
+
+    if(ibuf)
+        HDfree(ibuf);
+    if(cbuf)
+        HDfree(cbuf);
+
+    return FAIL;
+} /* end extend_dset_one() */
+
+/* Usage: extend_dset xx.h5 dname */
+int
+main(int argc, const char *argv[])
+{
+    char *dname = NULL;
+    char *fname = NULL;
+
+    if(argc != 3) {
+        HDfprintf(stderr, "Should have file name and dataset name to be extended...\n");
+        goto error;
+    } /* end if */
+
+    /* Get the dataset name to be extended */
+    fname = HDstrdup(argv[1]);
+    dname = HDstrdup(argv[2]);
+
+    if(!HDstrcmp(dname, DSET_CMPD) || !HDstrcmp(dname, DSET_CMPD_ESC)) {
+        if(extend_dset_one(fname, dname) < 0) 
+            goto error;
+    } else if(!HDstrcmp(dname, DSET_ONE) || !HDstrcmp(dname, DSET_ALLOC_LATE) || !HDstrcmp(dname, DSET_ALLOC_EARLY)) {
+        if(extend_dset_one(fname, dname) < 0) 
+            goto error;
+    } else if(!HDstrcmp(dname, DSET_TWO) || !HDstrcmp(dname, DSET_CMPD_TWO)) {
+        if(extend_dset_two(fname, dname) < 0) 
+            goto error;
+    } else {
+        HDfprintf(stdout, "Dataset cannot be extended...\n");
+        goto error;
+    } /* end if-else */
+
+    HDexit(EXIT_SUCCESS);
+
+error:
+    if(dname)
+        HDfree(dname);
+    if(fname)
+        HDfree(fname);
+    HDexit(EXIT_FAILURE);
+} /* end main() */
+
diff --git a/hl/tools/h5watch/h5watch.c b/hl/tools/h5watch/h5watch.c
new file mode 100644
index 0000000..97dca7a
--- /dev/null
+++ b/hl/tools/h5watch/h5watch.c
@@ -0,0 +1,973 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "h5tools.h"
+#include "h5tools_dump.h"
+#include "H5LDprivate.h"
+
+/*
+ * Note: This tool used private routine
+ */
+#define PROGRAMNAME "h5watch"	/* Name of tool */
+#define FIELD_SEP	","	/* nested field separator */
+#define DEFAULT_RETRY 	50	/* number of times to try opening the file */
+
+
+/*
+ * Note:(see comments in hl/src/H5LDprivate.h)
+ *	This tool uses private routines H5LD_construct_vector()and H5LD_clean_vector()
+ *	This tool uses H5LD_memb_t data structure declared in H5LDprivate.h
+ */
+
+const char  *progname = "h5watch";	/* tool name */
+static char *g_list_of_fields = NULL; 	/* command line input for "list_of_fields" */
+static char *g_dup_fields = NULL; 	/* copy of "list_of_fields" */
+static H5LD_memb_t **g_listv = NULL;   	/* vector info for "list_of_fields" */
+
+static hbool_t g_monitor_size_only = FALSE; /* monitor changes in dataset dimension sizes */
+static unsigned g_polling_interval = 1;	    /* polling interval to check appended data */
+static hbool_t g_label = FALSE;             /* label compound values */
+static int g_display_width = 80;	    /* output width in characters */
+static hbool_t g_simple_output = FALSE;     /* make output more machine-readable */
+static unsigned g_retry = DEFAULT_RETRY;    /* # of times to try opening the file if somehow file is unstable */
+static hbool_t g_display_hex = FALSE;	    /* display data in hexadecimal format : LATER */
+
+static herr_t doprint(hid_t did, hsize_t *start, hsize_t *block, int rank);
+static herr_t slicendump(hid_t did, hsize_t *prev_dims, hsize_t *cur_dims,
+  hsize_t *start, hsize_t *block, int rank, int subrank);
+static herr_t monitor_dataset(hid_t fid, char *dsetname);
+static herr_t process_cmpd_fields(hid_t fid, char *dsetname);
+static herr_t check_dataset(hid_t fid, char *dsetname);
+static void leave(int ret);
+static void usage(const char *prog);
+static void parse_command_line(int argc, const char *argv[]);
+
+
+/*
+ * Command-line options: The user can only specify long-named parameters.
+ * The long-named ones can be partially spelled. When
+ * adding more, make sure that they don't clash with each other.
+ */
+static const char *s_opts ="?";
+static struct long_options l_opts[] = {
+    { "help", no_arg, 'h' },
+    { "hel", no_arg, 'h' },
+    { "dim", no_arg, 'd' },
+    { "di", no_arg, 'd' },
+    { "label", no_arg, 'l' },
+    { "labe", no_arg, 'l' },
+    { "lab", no_arg, 'l' },
+    { "la", no_arg, 'l' },
+    { "simple", no_arg, 'S' },
+    { "simpl", no_arg, 'S' },
+    { "simp", no_arg, 'S' },
+    { "sim", no_arg, 'S' },
+    { "si", no_arg, 'S' },
+    { "hexdump", no_arg, 'x' },
+    { "hexdum", no_arg, 'x' },
+    { "hexdu", no_arg, 'x' },
+    { "hexd", no_arg, 'x' },
+    { "hex", no_arg, 'x' },
+    { "width", require_arg, 'w' },
+    { "widt", require_arg, 'w' },
+    { "wid", require_arg, 'w' },
+    { "wi", require_arg, 'w' },
+    { "polling", require_arg, 'p' },
+    { "pollin", require_arg, 'p' },
+    { "polli", require_arg, 'p' },
+    { "poll", require_arg, 'p' },
+    { "pol", require_arg, 'p' },
+    { "po", require_arg, 'p' },
+    { "fields", require_arg, 'f' },
+    { "field", require_arg, 'f' },
+    { "fiel", require_arg, 'f' },
+    { "fie", require_arg, 'f' },
+    { "fi", require_arg, 'f' },
+    { "version", no_arg, 'V' },
+    { "versio", no_arg, 'V' },
+    { "versi", no_arg, 'V' },
+    { "vers", no_arg, 'V' },
+    { "ver", no_arg, 'V' },
+    { "ve", no_arg, 'V' },
+    { NULL, 0, '\0' }
+};
+
+/*-------------------------------------------------------------------------
+ * Function: doprint()
+ *
+ * Purpose: Prepare to print the dataset's appended data.
+ *	    Call the tools library routine h5tools_dump_dset() to do the printing.
+ *	    (This routine is mostly copied from dump_dataset_values() in tools/h5ls/h5ls.c 
+ *	    and modified accordingly).
+ *
+ * Return: 0 on success; negative on failure
+ *
+ * Programmer: Vailin Choi; August 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+doprint(hid_t did, hsize_t *start, hsize_t *block, int rank)
+{
+    h5tools_context_t   ctx;  	/* print context  */
+    h5tool_format_t  info;	/* Format info for the tools library */
+    static char fmt_double[16], fmt_float[16];	/* Format info */
+    struct subset_t subset;	/* Subsetting info */
+    hsize_t ss_start[H5S_MAX_RANK];	/* Info for hyperslab */
+    hsize_t ss_stride[H5S_MAX_RANK];	/* Info for hyperslab */
+    hsize_t ss_block[H5S_MAX_RANK];	/* Info for hyperslab */
+    hsize_t ss_count[H5S_MAX_RANK];	/* Info for hyperslab */
+    int i;			/* Local index variable */
+    herr_t ret_value = SUCCEED; /* Return value */
+
+    /* Subsetting information for the tools library printing routines */
+    subset.start.data = ss_start;
+    subset.stride.data = ss_stride;
+    subset.block.data = ss_block;
+    subset.count.data = ss_count;
+
+    /* Initialize subsetting information */
+    for(i = 0; i < rank; i++) {
+        subset.stride.data[i] = 1;
+        subset.count.data[i] = 1;
+        subset.start.data[i] = start[i];
+        subset.block.data[i] = block[i];
+    } /* end for */
+
+    HDmemset(&ctx, 0, sizeof(ctx));
+
+    /* Set to all default values and then override */
+    HDmemset(&info, 0, sizeof info);
+
+    if(g_simple_output) {
+        info.idx_fmt = "";
+        info.line_ncols = 65535; /*something big*/
+        info.line_per_line = 1;
+        info.line_multi_new = 0;
+        info.line_pre  = "        ";
+        info.line_cont = "         ";
+
+        info.arr_pre = "";
+        info.arr_suf = "";
+        info.arr_sep = " ";
+
+        info.cmpd_pre = "";
+        info.cmpd_suf = "";
+        info.cmpd_sep = " ";
+
+        /* The "fields" selected by the user */
+        info.cmpd_listv = (const struct H5LD_memb_t * const *)g_listv;
+
+        if(g_label)
+            info.cmpd_name = "%s=";
+
+        info.elmt_suf1 = " ";
+        info.str_locale = ESCAPE_HTML;
+
+    } else {
+        info.idx_fmt = "(%s)";
+        if(!g_display_width) {
+            info.line_ncols = 65535;
+            info.line_per_line = 1;
+        } /* end if */
+        else
+            info.line_ncols = (unsigned)g_display_width;
+
+        info.line_multi_new = 1;
+
+        /* The "fields" selected by the user */
+        info.cmpd_listv = (const struct H5LD_memb_t * const *)g_listv;
+        if(g_label)
+            info.cmpd_name = "%s=";
+        info.line_pre  = "        %s ";
+        info.line_cont = "        %s  ";
+        info.str_repeat = 8;
+    } /* end else */
+
+    /* Floating point types should display full precision */
+    sprintf(fmt_float, "%%1.%dg", FLT_DIG);
+    info.fmt_float = fmt_float;
+    sprintf(fmt_double, "%%1.%dg", DBL_DIG);
+    info.fmt_double = fmt_double;
+
+    info.dset_format =  "DSET-%s ";
+    info.dset_hidefileno = 0;
+
+    info.obj_format = "-%lu:"H5_PRINTF_HADDR_FMT;
+    info.obj_hidefileno = 0;
+
+    info.dset_blockformat_pre = "%sBlk%lu: ";
+    info.dset_ptformat_pre = "%sPt%lu: ";
+
+    info.line_indent = "";
+
+    if(g_display_hex) {
+        /* Print all data in hexadecimal format if the `-x' or `--hexdump'
+         * command line switch was given. */
+        info.raw = TRUE;
+    } /* end if */
+
+    /* Print the values. */
+    if((ret_value = h5tools_dump_dset(stdout, &info, &ctx, did, &subset)) < 0)
+        error_msg("unable to print data\n");
+
+    HDfprintf(stdout, "\n");
+
+    return ret_value;
+
+} /* end doprint() */
+
+/*-------------------------------------------------------------------------
+ * Function: slicendump
+ *
+ * Purpose:  To dump the slice for each dimension
+ *	     For example: prev_dims[2] = {5, 4}; cur_dims[2] = {7, 8}
+ *		This routine will dump data as follows:
+ *		{0, 3} to {0, 7} (1x4 elements)
+ *		{1, 3} to {0, 7} (1x4 elements)
+ *		{2, 3} to {0, 7} (1x4 elements)
+ *		{3, 3} to {0, 7} (1x4 elements)
+ *		{4, 3} to {0, 7} (1x4 elements)
+ *		{5, 0} to {6, 7} (2x8 elements)
+ *
+ * Return:   Non-negative on success
+ *	     Negative on failure
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+slicendump(hid_t did, hsize_t *prev_dims, hsize_t *cur_dims, hsize_t *start, hsize_t *block, int rank, int subrank)
+{
+    int i;	/* Local index variable */
+    int ind; 	/* Index for the current rank */
+    herr_t ret_value = SUCCEED;	/* Return value */
+    
+    ind = rank - subrank;
+
+    if((subrank - 1) > 0) {
+        /* continue onto the next dimension */
+        for (i = 0; i < (hssize_t)MIN(prev_dims[ind], cur_dims[ind]); i++){
+            start[ind] = (hsize_t)i;
+            if((ret_value = slicendump(did, prev_dims, cur_dims, start, block, rank, subrank-1)) < 0)
+                goto done;
+        } /* end for */
+    } /* end if */
+
+    /* this dimension remains the same or shrinking */
+    if(cur_dims[ind] <= prev_dims[ind])
+        goto done;
+
+    /* select first the slice for the faster changing dimension */
+    /* select later the whole slice for the slower changing dimension */
+    start[ind] = prev_dims[ind];
+    block[ind] = cur_dims[ind] - prev_dims[ind];
+
+    for(i = ind + 1; i < rank; i++){
+        start[i] = 0;
+        block[i] = cur_dims[i];
+    } /* end for */
+
+    /* Print the appended data */
+    ret_value = doprint(did, start, block, rank);
+
+done:
+    return ret_value;
+} /* end slicendump() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    monitor_dataset
+ *
+ * Purpose:     To poll a dataset periodically for changes in dimension sizes.
+ *		For dataset with unchanged and/or decreased dimension sizes:
+ *		  it just prints the dimension size changes
+ *		For dataset with increase in at least one of its dimension sizes:
+ *		  it will print the new appended data to the dataset
+ *
+ * Return:      Non-negative on success: dataset can be monitored
+ *		Negative on failure: dataset cannot be monitored
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t 
+monitor_dataset(hid_t fid, char *dsetname)
+{
+    hid_t did;		/* dataset id */
+    hid_t sid;		/* dataspace id */
+    int	ndims;		/* # of dimensions in the dataspace */
+    int i, u;		/* local index variable */
+    hsize_t prev_dims[H5S_MAX_RANK];	/* current dataspace dimensions */
+    hsize_t cur_dims[H5S_MAX_RANK];	/* previous dataspace dimensions */
+    herr_t ret_value = SUCCEED;	/* return value */
+
+    HDfprintf(stdout, "Monitoring dataset %s...\n", dsetname);
+
+    /* Open the dataset for minitoring */
+    if((did = H5Dopen2(fid, dsetname, H5P_DEFAULT)) < 0) {
+	error_msg("error in opening dataset \"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }				
+    if((sid = H5Dget_space(did)) < 0) {
+	error_msg("error in getting dataspace id for dataset \"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }
+
+    /* Get the dataset's dimension sizes */
+    if((ndims = H5Sget_simple_extent_dims(sid, prev_dims, NULL)) < 0) {
+	error_msg("unable to get dimensions sizes for \"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }
+
+    while(1) {
+
+	/* Refreshes the dataset */
+	if(H5Drefresh(did) < 0) {
+	    ret_value = FAIL;
+	    goto done;
+	}
+
+	/* Get the dataset's current dimension sizes */
+	if(H5LDget_dset_dims(did, cur_dims) < 0) {
+	    error_msg("unable to get dimension sizes for \"%s\"\n", dsetname);
+	    ret_value = FAIL;
+	    goto done;
+	}
+
+	/* Check the dimension sizes */
+	for(i = 0; i < ndims; i++)
+	    if(cur_dims[i] != prev_dims[i])
+		break;
+
+	/* at least one dimension has changed */
+	if(i != ndims) {
+	    /* Printing changes in dimension sizes */
+	    for(u = 0; u < ndims; u++) {
+		HDfprintf(stdout, "dimension %u: %Hu->%Hu", (unsigned)u, prev_dims[u], cur_dims[u]);
+		if(cur_dims[u] > prev_dims[u])
+		    HDfprintf(stdout, " (increases)\n");
+		else if(cur_dims[u] < prev_dims[u])
+		    HDfprintf(stdout, " (decreases)\n");
+		else
+		    HDfprintf(stdout, " (unchanged)\n");
+	    }
+
+	    /* Printing elements appended to the dataset if there is */
+	    if(!g_monitor_size_only) {
+
+		/* See if at least one dimension size has increased */
+		for(u = 0; u < ndims; u++) {
+		    int j;
+		    hsize_t start[H5S_MAX_RANK];
+		    hsize_t block[H5S_MAX_RANK];
+
+		    /* Print the new appended data to the dataset */
+		    if(cur_dims[u] > prev_dims[u]) {
+			HDfprintf(stdout, "    Data:\n");
+
+			for(j = 0; j < ndims; j++) {
+			    start[j] = 0;
+			    block[j] = 1;
+			}
+
+			if((ret_value = slicendump(did, prev_dims, cur_dims, start, block, ndims, ndims)) < 0)
+			    goto done;
+			break;
+		    }
+		} /* end for */
+	    }
+	    HDfflush(stdout);
+	}
+	    
+	/* Save the current dimension sizes */
+	HDmemcpy(prev_dims, cur_dims, (size_t)ndims * sizeof(hsize_t));
+
+	/* Sleep before next monitor */
+        HDsleep(g_polling_interval);
+    } /* end while */
+
+done:
+    /* Closing */
+    H5E_BEGIN_TRY
+	H5Dclose(did);
+    H5E_END_TRY
+
+    return(ret_value);
+} /* monitor_dataset() */
+
+/*-------------------------------------------------------------------------
+ * Function:  process_cmpd_fields
+ *
+ * Purpose: To check whether the fields selected in "g_list_of_fields"
+ *	    are valid fields associated with the dataset.
+ *
+ * Return: 0 on success; negative on failure
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+process_cmpd_fields(hid_t fid, char *dsetname)
+{
+    hid_t did=-1;			/* dataset id */
+    hid_t dtid=-1, tid=-1;	/* dataset's data type id */
+    size_t len;		/* number of comma-separated fields in "g_list_of_fields" */
+    herr_t ret_value = SUCCEED;	/* Return value */
+
+    HDassert(g_list_of_fields && *g_list_of_fields);
+    
+    /* Open the dataset */
+    if((did = H5Dopen2(fid, dsetname, H5P_DEFAULT)) < 0) {
+	error_msg("error in opening dataset \"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }
+
+    /* Get the dataset's datatype  */
+    if(((dtid = H5Dget_type(did)) < 0) || (tid = H5Tget_native_type(dtid, H5T_DIR_DEFAULT)) < 0) {
+	error_msg("error in getting dataset's datatype\n");
+        ret_value = FAIL;
+        goto done;
+    }
+
+    /* Check to make sure that the dataset's datatype is compound type */
+    if(H5Tget_class(dtid) != H5T_COMPOUND) {
+	error_msg("dataset should be compound type for <list_of_fields>\n");
+	ret_value = FAIL;
+	goto done;		
+    }
+
+    /* Make a copy of "g_list_of_fields" */
+    if((g_dup_fields = HDstrdup(g_list_of_fields)) == NULL) {
+	error_msg("error in duplicating g_list_of_fields\n");
+        ret_value = FAIL;
+	goto done;		
+    }
+
+    /* Estimate the number of comma-separated fields in "g_list of_fields" */
+    len = HDstrlen(g_list_of_fields)/2 + 2;
+
+    /* Allocate memory for a list vector of H5LD_memb_t structures to store "g_list_of_fields" info */
+    if((g_listv = (H5LD_memb_t **)HDcalloc(len, sizeof(H5LD_memb_t *))) == NULL) {
+	error_msg("error in allocating memory for H5LD_memb_t\n");
+        ret_value = FAIL;
+	goto done;		
+    }
+
+    /* Process and store info for "g_listv" */
+    if(H5LD_construct_vector(g_dup_fields, g_listv, tid) < 0) {
+	error_msg("error in processing <list_of_fields>\n");
+	ret_value = FAIL;
+        goto done;
+    }
+
+    /* Will free memory for g_listv and g_dup_fields when exiting from h5watch */
+done:
+    /* Closing */
+    H5E_BEGIN_TRY
+	H5Tclose(dtid);
+	H5Tclose(tid);
+	H5Dclose(did);
+    H5E_END_TRY
+    return(ret_value);
+} /* process_cmpd_fields() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    check_dataset
+ *
+ * Purpose:     To check whether a dataset can be monitored:
+ 		  A chunked dataset with unlimited or max. dimension setting
+ *
+ * Return:      Non-negative on success: dataset can be monitored
+ *		Negative on failure: dataset cannot be monitored
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+check_dataset(hid_t fid, char *dsetname)
+{
+    hid_t did=-1;	/* Dataset id */
+    hid_t dcp=-1;	/* Dataset creation property */
+    hid_t sid=-1;	/* Dataset's dataspace id */
+    int	  ndims;	/* # of dimensions in the dataspace */
+    unsigned u;		/* Local index variable */
+    hsize_t cur_dims[H5S_MAX_RANK];	/* size of dataspace dimensions */
+    hsize_t max_dims[H5S_MAX_RANK];	/* maximum size of dataspace dimensions */
+    hbool_t unlim_max_dims = FALSE;	/* whether dataset has unlimited or max. dimension setting */
+    void               *edata;
+    H5E_auto2_t         func;
+    H5D_layout_t        layout;
+    herr_t ret_value = SUCCEED;	/* Return value */
+
+    /* Disable error reporting */
+    H5Eget_auto2(H5E_DEFAULT, &func, &edata);
+    H5Eset_auto2(H5E_DEFAULT, NULL, NULL);
+
+    /* Open the dataset */
+    if((did = H5Dopen2(fid, dsetname, H5P_DEFAULT)) < 0) {
+	error_msg("unable to open dataset \"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }
+
+    /* Get dataset's creation property list */
+    if((dcp = H5Dget_create_plist(did)) < 0) {
+        error_msg("unable to get dataset's creation property list \"%s\"\n", dsetname);
+        ret_value = FAIL;
+        goto done;
+    }
+
+    /* Query dataset's layout; the layout should be chunked or virtual */
+    if((layout = H5Pget_layout(dcp)) < 0) {
+        error_msg("unable to get dataset layout \"%s\"\n", dsetname);
+        ret_value = FAIL;
+        goto done;
+    }
+    if(layout != H5D_CHUNKED && layout != H5D_VIRTUAL) {
+        error_msg("\"%s\" should be a chunked or virtual dataset\n", dsetname);
+        ret_value = FAIL;
+        goto done;
+    }
+
+    HDmemset(cur_dims, 0, sizeof cur_dims);
+    HDmemset(max_dims, 0, sizeof max_dims);
+
+    /* Get dataset's dataspace */
+    if((sid = H5Dget_space(did)) < 0) {
+	error_msg("can't get dataset's dataspace\"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }
+
+    /* Get dimension size of dataset's dataspace */
+    if((ndims = H5Sget_simple_extent_dims(sid, cur_dims, max_dims)) < 0) {
+	error_msg("can't get dataspace dimensions for dataset \"%s\"\n", dsetname);
+	ret_value = FAIL;
+	goto done;
+    }
+
+    /* Check whether dataset has unlimited dimension or max. dimension setting */
+    for(u = 0; u < (unsigned)ndims; u++)
+	if(max_dims[u] == H5S_UNLIMITED || cur_dims[u] != max_dims[u]) {
+    	    unlim_max_dims = TRUE;
+	    break;
+	}
+
+    if(!unlim_max_dims) {
+	error_msg("\"%s\" should have unlimited or max. dimension setting\n", dsetname);
+	ret_value = FAIL;
+    }
+
+done: 
+    H5Eset_auto2(H5E_DEFAULT, func, edata);
+
+    /* Closing */
+    H5E_BEGIN_TRY
+	H5Sclose(sid);
+	H5Pclose(dcp);
+	H5Dclose(did);
+    H5E_END_TRY
+
+    return(ret_value);
+} /* check_dataset() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    leave
+ *
+ * Purpose:     Close the H5 Tools library and exit
+ *
+ * Return:      Does not return
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+leave(int ret)
+{
+    h5tools_close();
+
+    exit(ret);
+}
+
+
+/*-------------------------------------------------------------------------
+ * Function:    usage
+ *
+ * Purpose:     Print the usage message about h5watch (only long options)
+ *
+ * Return:      void
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ * Modifications:
+ *-------------------------------------------------------------------------
+ */
+static void 
+usage(const char *prog)
+{
+    HDfflush(stdout);
+    HDfprintf(stdout, "Usage: %s [OPTIONS] [OBJECT]\n", prog);
+    HDfprintf(stdout, "\n");
+    HDfprintf(stdout, "     OPTIONS\n");
+    HDfprintf(stdout, "        --help            Print a usage message and exit.\n");
+    HDfprintf(stdout, "        --version         Print version number and exit.\n");
+    HDfprintf(stdout, "        --label           Label members of compound typed dataset.\n");
+    HDfprintf(stdout, "        --simple          Use a machine-readable output format.\n");
+    HDfprintf(stdout, "        --dim             Monitor changes in size of dataset dimensions only.\n");
+    HDfprintf(stdout, "        --width=N         Set the number of columns to N for output.\n");
+    HDfprintf(stdout, "                              A value of 0 sets the number of columns to the\n");
+    HDfprintf(stdout, "                              maximum (65535). The default width is 80 columns.\n");
+    HDfprintf(stdout, "        --polling=N       Set the polling interval to N (in seconds) when the\n");
+    HDfprintf(stdout, "                              dataset will be checked for appended data.  The default\n");
+    HDfprintf(stdout, "                              polling interval is 1.\n");
+    HDfprintf(stdout, "        --fields=<list_of_fields>\n");
+    HDfprintf(stdout, "                              Display data for the fields specified in <list_of_fields>\n");
+    HDfprintf(stdout, "                              for a compound data type.  <list_of_fields> can be\n");
+    HDfprintf(stdout, "                              specified as follows:\n");
+    HDfprintf(stdout, "                                   1) A comma-separated list of field names in a\n");
+    HDfprintf(stdout, "                                   compound data type.  \",\" is the separator\n"); 
+    HDfprintf(stdout, "                                   for field names while \".\" is the separator\n");
+    HDfprintf(stdout, "                                   for a nested field.\n");
+    HDfprintf(stdout, "                                   2) A single field name in a compound data type.\n");
+    HDfprintf(stdout, "                                   Can use this option multiple times.\n");
+    HDfprintf(stdout, "                              Note that backslash is the escape character to avoid\n");
+    HDfprintf(stdout, "                              characters in field names that conflict with the tool's\n");
+    HDfprintf(stdout, "                              separators.\n");
+    HDfprintf(stdout, "\n");
+    HDfprintf(stdout, "     OBJECT is specified as [<filename>/<path_to_dataset>/<dsetname>]\n");
+    HDfprintf(stdout, "        <filename>            Name of the HDF5 file.  It may be preceded by path\n");
+    HDfprintf(stdout, "                              separated by slashes to the specified HDF5 file.\n");
+    HDfprintf(stdout, "        <path_to_dataset>     Path separated by slashes to the specified dataset\n");
+    HDfprintf(stdout, "        <dsetname>            Name of the dataset\n");
+    HDfprintf(stdout, "\n");
+    HDfprintf(stdout, "     User can end the h5watch process by ctrl-C (SIGINT) or kill the process (SIGTERM).\n");
+
+} /* usage() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    parse_command_line
+ *
+ * Purpose:     Parse the command line for h5watch (take only long options)
+ *
+ * Return:      Success:    Set the corresponding command flags and return void
+ *              Failure:    Exits program with EXIT_FAILURE value.
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ * Modifications:
+ *
+ *-------------------------------------------------------------------------
+ */
+static void
+parse_command_line(int argc, const char *argv[])
+{
+    int	opt;	/* Command line option */
+    int tmp;
+
+     /* no arguments */
+    if (argc == 1) {
+        usage(h5tools_getprogname());
+        leave(EXIT_FAILURE);
+    }
+
+    /* parse command line options */
+    while ((opt = get_option(argc, argv, s_opts, l_opts)) != EOF) {
+        switch ((char)opt) {
+        case '?':
+        case 'h': /* --help */
+	    usage(h5tools_getprogname());
+            leave(EXIT_SUCCESS);
+
+        case 'V': /* --version */
+            print_version(progname);
+            leave(EXIT_SUCCESS);
+            break;
+
+        case 'w': /* --width=N */
+	    g_display_width = (int)HDstrtol(opt_arg, NULL, 0);
+	    if(g_display_width < 0) {
+		usage(h5tools_getprogname());
+		leave(EXIT_FAILURE);
+	    }
+            break;
+
+        case 'd': /* --dim */
+	    g_monitor_size_only = TRUE;
+            break;
+
+        case 'S': /* --simple */
+	    g_simple_output = TRUE;
+            break;
+	
+	case 'l': /* --label */
+	    g_label = TRUE;
+            break;
+
+        case 'p': /* --polling=N */
+	    /* g_polling_interval = HDstrtod(opt_arg, NULL); */
+	    if((tmp = (int)HDstrtol(opt_arg, NULL, 10)) <= 0) {
+		usage(h5tools_getprogname());
+		leave(EXIT_FAILURE);
+	    }
+	    g_polling_interval = (unsigned)tmp;
+            break;
+
+        case 'f': /* --fields=<list_of_fields> */
+	    if(g_list_of_fields == NULL) {
+		if((g_list_of_fields = HDstrdup(opt_arg)) == NULL) {
+		    error_msg("memory allocation failed (file %s:line %d)\n",
+			      __FILE__, __LINE__);
+		    leave(EXIT_FAILURE);
+		}
+	    } else {
+		char *str;
+
+		if((str = HDstrdup(opt_arg)) == NULL) {
+		    error_msg("memory allocation failed (file %s:line %d)\n",
+			      __FILE__, __LINE__);
+		    leave(EXIT_FAILURE);
+		}
+		if((g_list_of_fields = (char *)HDrealloc(g_list_of_fields, HDstrlen(g_list_of_fields) + HDstrlen(str) + 2)) == NULL) {
+		    error_msg("memory allocation failed (file %s:line %d)\n",
+			      __FILE__, __LINE__);
+		    leave(EXIT_FAILURE);
+
+		}
+		HDstrcat(g_list_of_fields, FIELD_SEP);
+		HDstrcat(g_list_of_fields, str);
+	    }
+
+            break;
+
+        default:
+	    usage(h5tools_getprogname());
+            leave(EXIT_FAILURE);
+        }
+    }
+    
+
+    /* check for object to be processed */
+    if (argc <= opt_ind) {
+        error_msg("missing dataset name\n");
+	usage(h5tools_getprogname());
+        leave(EXIT_FAILURE);
+    }
+} /* parse_command_line() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    catch_signal
+ *
+ * Purpose:     The signal handler to catch the signals:
+ *		SIGTERM and SIGINT and exit from h5watch
+ *
+ * Return:      No return
+ *
+ * Programmer:  Vailin Choi; November 2014
+ *
+ *-------------------------------------------------------------------------
+ */
+static void catch_signal(int H5_ATTR_UNUSED signo)
+{
+    /* Exit from h5watch */
+    leave(EXIT_SUCCESS);
+
+} /* catch_signal() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    main
+ *
+ * Purpose:     h5watch
+ *
+ * Return:      Success:    0
+ *              Failure:    1
+ *
+ * Programmer:  Vailin Choi; August 2010
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main(int argc, const char *argv[])
+{
+    char        drivername[50];
+    char 	*fname = NULL; 
+    char	*dname = NULL; 
+    void               *edata;
+    H5E_auto2_t         func;
+    char	*x;
+    hid_t       fid = -1;
+    hid_t       fapl = -1;
+
+    /* Set up tool name and exit status */
+    h5tools_setprogname(PROGRAMNAME);
+    h5tools_setstatus(EXIT_SUCCESS);
+
+    /* Disable error reporting */
+    H5Eget_auto2(H5E_DEFAULT, &func, &edata);
+    H5Eset_auto2(H5E_DEFAULT, NULL, NULL);
+
+    /* Initialize h5tools lib */
+    h5tools_init();
+
+    /* To exit from h5watch for SIGTERM signal */
+    if(HDsignal(SIGTERM, catch_signal) == SIG_ERR) {
+	error_msg("An error occurred while setting a signal handler.\n");
+	leave(EXIT_FAILURE);
+    }
+
+    /* To exit from h5watch for SIGINT signal */
+    if(HDsignal(SIGINT, catch_signal) == SIG_ERR) {
+        error_msg("An error occurred while setting a signal handler.\n");
+	leave(EXIT_FAILURE);
+    }
+
+    /* parse command line options */
+    parse_command_line(argc, argv);
+
+    if(argc <= opt_ind) {
+        error_msg("missing dataset name\n");
+	usage(h5tools_getprogname());
+        leave(EXIT_FAILURE);
+    }
+
+    /* Mostly copied from tools/h5ls coding & modified accordingly */
+    /* 
+     * [OBJECT] is specified as 
+     *		[<filename>/<path_to_dataset>/<dsetname>]
+     *
+     * Example: ../dir1/foo/bar/dset
+     *          \_________/\______/
+     *             file       obj
+     *
+     * The dichotomy is determined by calling H5Fopen() repeatedly until it
+     * succeeds. The first call uses the entire name and each subsequent call
+     * chops off the last component. If we reach the beginning of the name
+     * then there must have been something wrong with the file (perhaps it
+     * doesn't exist). 
+     */
+    if((fname = HDstrdup(argv[opt_ind])) == NULL) {
+	error_msg("memory allocation failed (file %s:line %d)\n",
+                  __FILE__, __LINE__);
+	h5tools_setstatus(EXIT_FAILURE);
+    }
+
+    /* Create a copy of file access property list */
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
+        return -1;
+
+    /* Set to use the latest library format */
+    if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+        return -1;
+
+    do {
+	while(fname && *fname) {
+	    fid = h5tools_fopen(fname, H5F_ACC_RDONLY|H5F_ACC_SWMR_READ, fapl, NULL, drivername, sizeof drivername);
+
+	    if(fid >= 0) {
+		HDfprintf(stdout, "Opened \"%s\" with %s driver.\n", fname, drivername);
+		break; /*success*/
+	    } /* end if */
+
+	    /* Shorten the file name; lengthen the object name */
+	    x = dname;
+	    dname = HDstrrchr(fname, '/');
+	    if(x)
+		*x = '/';
+	    if(!dname)
+		break;
+	    *dname = '\0';
+	} /* end while */
+    /* Try opening the file again if somehow unstable */
+    } while(g_retry-- > 0 && fid == FAIL);
+
+    if(fid < 0) {
+	error_msg("unable to open file \"%s\"\n", fname);
+	if(fname) HDfree(fname);
+	if(fapl >= 0) H5Pclose(fapl);
+	leave(EXIT_FAILURE);
+    } 
+
+    if(!dname) {
+	error_msg("no dataset specified\n");
+	h5tools_setstatus(EXIT_FAILURE);
+    } else {
+	*dname = '/';
+	x = dname;
+	if((dname = HDstrdup(dname)) == NULL) {
+	    error_msg("memory allocation failed (file %s:line %d)\n",
+                      __FILE__, __LINE__);
+	    h5tools_setstatus(EXIT_FAILURE);
+	} else {
+	    *x = '\0';
+	    /* Validate dataset */
+	    if(check_dataset(fid, dname) < 0)
+		h5tools_setstatus(EXIT_FAILURE);
+	    /* Validate input "fields" */
+	    else if(g_list_of_fields && *g_list_of_fields)
+		if(process_cmpd_fields(fid, dname) < 0)
+		    h5tools_setstatus(EXIT_FAILURE);
+	}
+    } 
+
+    /* If everything is fine, start monitoring the datset */
+    if(h5tools_getstatus() != EXIT_FAILURE)
+	if(monitor_dataset(fid, dname) < 0)
+	    h5tools_setstatus(EXIT_FAILURE);
+     	    
+    /* Free spaces */
+    if(fname) HDfree(fname);
+    if(dname) HDfree(dname);
+    if(g_list_of_fields) HDfree(g_list_of_fields);
+    if(g_listv) {
+	H5LD_clean_vector(g_listv);
+	HDfree(g_listv);
+    }
+    if(g_dup_fields) HDfree(g_dup_fields);
+
+    /* Close the file access property list */
+    if(fapl >= 0 && H5Pclose(fapl) < 0) {
+	error_msg("unable to close file access property list\n");
+	h5tools_setstatus(EXIT_FAILURE);
+    }
+
+    /* Close the file */
+    if(H5Fclose(fid) < 0) {
+	error_msg("unable to close file\n");
+	h5tools_setstatus(EXIT_FAILURE);
+    }
+
+    H5Eset_auto2(H5E_DEFAULT, func, edata);
+    /* exit */
+    leave(h5tools_getstatus());
+} /* main() */
+
diff --git a/hl/tools/h5watch/h5watchgentest.c b/hl/tools/h5watch/h5watchgentest.c
new file mode 100644
index 0000000..12298ca
--- /dev/null
+++ b/hl/tools/h5watch/h5watchgentest.c
@@ -0,0 +1,350 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+#include "hdf5.h"
+#include "H5HLprivate2.h"
+
+/*
+ *  WATCH.h5: file with various types of datasets for testing--                                   
+ *
+ *  The following datasets are chunked, H5D_ALLOC_TIME_INCR, max. dimensional setting:       
+ *      DSET_ONE: one-dimensional dataset                                                   
+ *      DSET_TWO: two-dimensional dataset                                                  
+ *      DSET_CMPD: one-dimensional dataset with compound type                             
+ *      DSET_CMPD_ESC: one-dimensional dataset with compound type and member names with
+ *		       escape/separator characters 
+ *      DSET_CMPD_TWO: two-dimensional dataset with compound type                             
+ *                                                                                           
+ *  The following datasets are one-dimensional, chunked, max. dimension setting:              
+ *      DSET_ALLOC_EARLY: dataset with H5D_ALLOC_TIME_EARLY                                  
+ *      DSET_ALLOC_LATE: dataset H5D_ALLOC_TIME_LATE                                        
+ *                                                                                       
+ *  The following datasets are one-dimensional:                                           
+ *      DSET_NONE: fixed dimension setting, contiguous, H5D_ALLOC_TIME_LATE              
+ *      DSET_NOMAX: fixed dimension setting, chunked, H5D_ALLOC_TIME_INCR      
+ */
+#define ONE_DIMS0	10
+#define MAX_ONE_DIMS0	100
+
+#define DSET_ONE 	"DSET_ONE"
+#define DSET_NONE	"DSET_NONE"
+#define DSET_NOMAX	"DSET_NOMAX"
+#define DSET_ALLOC_LATE "DSET_ALLOC_LATE"
+#define DSET_ALLOC_EARLY "DSET_ALLOC_EARLY"
+#define DSET_CMPD 	"DSET_CMPD"
+#define DSET_CMPD_ESC 	"DSET_CMPD_ESC"
+
+#define TWO_DIMS0	4
+#define TWO_DIMS1	10
+#define MAX_TWO_DIMS0	60
+#define MAX_TWO_DIMS1	100
+
+#define DSET_TWO 	"DSET_TWO"
+#define DSET_CMPD_TWO 	"DSET_CMPD_TWO"
+
+#define CHUNK_SIZE	2
+
+#define FILE "WATCH.h5"
+
+/* Data structures for datasets with compound types */
+typedef struct sub22_t {
+    unsigned int a;
+    unsigned int b;
+    unsigned int c;
+} sub22_t;
+
+typedef struct sub2_t {
+    unsigned int a;
+    sub22_t b;
+    unsigned int c;
+} sub2_t;
+
+typedef struct sub4_t {
+    unsigned int a;
+    unsigned int b;
+} sub4_t;
+
+typedef struct set_t {
+    unsigned int field1;
+    sub2_t field2;
+    double field3;
+    sub4_t field4;
+} set_t;
+
+/*
+ **************************************************************************************
+ *
+ * Create a dataset with the given input parameters
+ * Write to the dataset with the given "data"
+ *
+ **************************************************************************************
+ */
+static herr_t
+generate_dset(hid_t fid, const char *dname, int ndims, hsize_t *dims, hsize_t *maxdims, hid_t dtid, void *data)
+{
+    hid_t dcpl=-1;		/* Dataset creation property */
+    hid_t did=-1;		/* Dataset id */
+    hid_t sid=-1;		/* Dataspace id */
+    int i;		/* Local index variable */
+    hsize_t chunk_dims[H5S_MAX_RANK];	/* Dimension sizes for chunks */
+
+    /* Create the dataspace */
+    if((sid = H5Screate_simple(ndims, dims, maxdims)) < 0)
+        goto done;
+
+    /* Set up dataset's creation properties */
+    if(!HDstrcmp(dname, DSET_NONE))
+        dcpl = H5P_DEFAULT;
+    else {
+        if((dcpl = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+            goto done;
+        for(i = 0; i < ndims; i++)
+            chunk_dims[i] = CHUNK_SIZE;
+        if(H5Pset_chunk(dcpl, ndims, chunk_dims) < 0)
+            goto done;
+    } /* end else */
+
+    if(!HDstrcmp(dname, DSET_ALLOC_LATE)) {
+        if(H5Pset_alloc_time(dcpl, H5D_ALLOC_TIME_LATE) < 0)
+            goto done;
+    } else if(!HDstrcmp(dname, DSET_ALLOC_EARLY)) {
+        if(H5Pset_alloc_time(dcpl, H5D_ALLOC_TIME_EARLY) < 0)
+            goto done;
+    } /* end if-else */
+
+    /* Create the dataset */
+    if((did = H5Dcreate2(fid, dname, dtid, sid, H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0)
+        goto done;
+
+    /* Write to the dataset */
+    if(H5Dwrite(did, dtid, H5S_ALL, H5S_ALL, H5P_DEFAULT, data) < 0)
+        goto done;
+
+    /* Closing */
+    if(H5Pclose(dcpl) < 0) goto done;
+    if(H5Sclose(sid) < 0) goto done;
+    if(H5Dclose(did) < 0) goto done;
+
+    return SUCCEED;
+
+done:
+    H5E_BEGIN_TRY
+	H5Sclose(sid);
+	H5Pclose(dcpl);
+	H5Dclose(did);
+    H5E_END_TRY
+
+    return FAIL;
+} /* end generate_dset() */
+
+int
+main(void)
+{
+    hid_t fid=-1;			/* File id */
+    hid_t fapl=-1;			/* File access property list id */
+    hsize_t cur_dims[1];		/* Dimension sizes */
+    hsize_t max_dims[1];		/* Maximum dimension sizes */
+    hsize_t cur2_dims[2];		/* Current dimension sizes */
+    hsize_t max2_dims[2];		/* Maximum dimension sizes */
+    hid_t set_tid=-1, esc_set_tid=-1;	/* Compound type id */
+    hid_t sub22_tid=-1;			/* Compound type id */
+    hid_t sub2_tid=-1, esc_sub2_tid=-1;	/* Compound type id */
+    hid_t sub4_tid=-1, esc_sub4_tid=-1;	/* Compound type id */
+    int one_data[ONE_DIMS0];		/* Buffer for data */
+    int two_data[TWO_DIMS0*TWO_DIMS1];	/* Buffer for data */
+    set_t one_cbuf[ONE_DIMS0];		/* Buffer for data with compound type */
+    set_t two_cbuf[TWO_DIMS0*TWO_DIMS1];	/* Buffer for data with compound type */
+    int i;				/* Local index variable */
+
+    /* Create a copy of file access property list */
+    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
+        HDexit(EXIT_FAILURE);
+    /* Set to use the latest library format */
+    if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+        HDexit(EXIT_FAILURE);
+
+    /* Create a file with the latest format */
+    if((fid = H5Fcreate(FILE, H5F_ACC_TRUNC, H5P_DEFAULT, fapl)) < 0)
+        HDexit(EXIT_FAILURE);
+
+    /* Initialization for one-dimensional dataset */
+    cur_dims[0] = ONE_DIMS0;
+    max_dims[0] = MAX_ONE_DIMS0;
+    for(i = 0; i < ONE_DIMS0; i++)
+        one_data[i] = i;
+
+    /* Generate DSET_ONE, DSET_NONE, DSET_NOMAX, DSET_ALLOC_LATE, DSET_EARLY */
+    if(generate_dset(fid, DSET_ONE, 1, cur_dims, max_dims, H5T_NATIVE_INT, one_data) < 0)
+        goto done;
+    if(generate_dset(fid, DSET_NONE, 1, cur_dims, NULL, H5T_NATIVE_INT, one_data) < 0)
+        goto done;
+    if(generate_dset(fid, DSET_NOMAX, 1, cur_dims, NULL, H5T_NATIVE_INT, one_data) < 0)
+        goto done;
+    if(generate_dset(fid, DSET_ALLOC_LATE, 1, cur_dims, max_dims, H5T_NATIVE_INT, one_data) < 0)
+        goto done;
+    if(generate_dset(fid, DSET_ALLOC_EARLY, 1, cur_dims, max_dims, H5T_NATIVE_INT, one_data) < 0)
+        goto done;
+
+    /* Initialization for two-dimensional dataset */
+    cur2_dims[0] = TWO_DIMS0;
+    cur2_dims[1] = TWO_DIMS1;
+    max2_dims[0] = MAX_TWO_DIMS0;
+    max2_dims[1] = MAX_TWO_DIMS1;
+
+    for(i = 0; i < (TWO_DIMS0 * TWO_DIMS1); i++)
+        two_data[i] = i;
+
+    /* Generate DSET_TWO */
+    if(generate_dset(fid, DSET_TWO, 2, cur2_dims, max2_dims, H5T_NATIVE_INT, two_data) < 0)
+        goto done;
+
+    /* Initialization for one-dimensional compound typed dataset */
+    cur_dims[0] = ONE_DIMS0;
+    max_dims[0] = MAX_ONE_DIMS0;
+
+    for(i = 0; i < ONE_DIMS0; i++) {
+        one_cbuf[i].field1 = 1;
+        one_cbuf[i].field2.a = 2;
+        one_cbuf[i].field2.c = 4;
+        one_cbuf[i].field2.b.a = 20;
+        one_cbuf[i].field2.b.b = 40;
+        one_cbuf[i].field2.b.c = 80;
+        one_cbuf[i].field3 = 3.0F;
+        one_cbuf[i].field4.a = 4;
+        one_cbuf[i].field4.b = 8;
+    } /* end for */
+
+    /* Create the compound type */
+    if((sub22_tid = H5Tcreate(H5T_COMPOUND, sizeof(sub22_t))) < 0)
+        goto done;
+    if(H5Tinsert(sub22_tid, "a", HOFFSET(sub22_t, a), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(sub22_tid, "b", HOFFSET(sub22_t, b), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(sub22_tid, "c", HOFFSET(sub22_t, c), H5T_NATIVE_INT) < 0)
+        goto done;
+
+    if((sub2_tid = H5Tcreate(H5T_COMPOUND, sizeof(sub2_t))) < 0)
+        goto done;
+    if(H5Tinsert(sub2_tid, "a", HOFFSET(sub2_t, a), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(sub2_tid, "b", HOFFSET(sub2_t, b), sub22_tid) < 0)
+        goto done;
+    if(H5Tinsert(sub2_tid, "c", HOFFSET(sub2_t, c), H5T_NATIVE_INT) < 0)
+        goto done;
+
+    if((sub4_tid = H5Tcreate(H5T_COMPOUND, sizeof(sub4_t))) < 0)
+        goto done;
+    if(H5Tinsert(sub4_tid, "a", HOFFSET(sub4_t, a), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(sub4_tid, "b", HOFFSET(sub4_t, b), H5T_NATIVE_INT) < 0)
+        goto done;
+
+    if((set_tid = H5Tcreate(H5T_COMPOUND, sizeof(set_t))) < 0)
+        goto done;
+    if(H5Tinsert(set_tid, "field1", HOFFSET(set_t, field1), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(set_tid, "field2", HOFFSET(set_t, field2), sub2_tid) < 0)
+        goto done;
+    if(H5Tinsert(set_tid, "field3", HOFFSET(set_t, field3), H5T_NATIVE_DOUBLE) < 0)
+        goto done;
+    if(H5Tinsert(set_tid, "field4", HOFFSET(set_t, field4), sub4_tid) < 0)
+        goto done;
+
+    /* Create the compound type with escape/separator characters */
+    if((esc_sub2_tid = H5Tcreate(H5T_COMPOUND, sizeof(sub2_t))) < 0)
+        goto done;
+    if(H5Tinsert(esc_sub2_tid, ".a", HOFFSET(sub2_t, a), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(esc_sub2_tid, ",b", HOFFSET(sub2_t, b), sub22_tid) < 0)
+        goto done;
+    if(H5Tinsert(esc_sub2_tid, "\\K", HOFFSET(sub2_t, c), H5T_NATIVE_INT) < 0)
+        goto done;
+
+    if((esc_sub4_tid = H5Tcreate(H5T_COMPOUND, sizeof(sub4_t))) < 0)
+        goto done;
+    if(H5Tinsert(esc_sub4_tid, "a.", HOFFSET(sub4_t, a), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(esc_sub4_tid, "b,", HOFFSET(sub4_t, b), H5T_NATIVE_INT) < 0)
+        goto done;
+
+    if((esc_set_tid = H5Tcreate(H5T_COMPOUND, sizeof(set_t))) < 0)
+        goto done;
+    if(H5Tinsert(esc_set_tid, "field,1", HOFFSET(set_t, field1), H5T_NATIVE_INT) < 0)
+        goto done;
+    if(H5Tinsert(esc_set_tid, "field2.", HOFFSET(set_t, field2), esc_sub2_tid) < 0)
+        goto done;
+    if(H5Tinsert(esc_set_tid, "field\\3", HOFFSET(set_t, field3), H5T_NATIVE_DOUBLE) < 0)
+        goto done;
+    if(H5Tinsert(esc_set_tid, "field4,", HOFFSET(set_t, field4), esc_sub4_tid) < 0)
+        goto done;
+
+    /* Generate DSET_CMPD, DSET_CMPD_ESC */
+    if(generate_dset(fid, DSET_CMPD, 1, cur_dims, max_dims, set_tid, one_cbuf) < 0)
+        goto done;
+    if(generate_dset(fid, DSET_CMPD_ESC, 1, cur_dims, max_dims, esc_set_tid, one_cbuf) < 0)
+        goto done;
+
+    /* Initialization for two-dimensional compound typed dataset */
+    cur2_dims[0] = TWO_DIMS0;
+    cur2_dims[1] = TWO_DIMS1;
+    max2_dims[0] = MAX_TWO_DIMS0;
+    max2_dims[0] = MAX_TWO_DIMS1;
+
+    for(i = 0; i < (TWO_DIMS0 * TWO_DIMS1); i++) {
+        two_cbuf[i].field1 = 1;
+        two_cbuf[i].field2.a = 2;
+        two_cbuf[i].field2.c = 4;
+        two_cbuf[i].field2.b.a = 20;
+        two_cbuf[i].field2.b.b = 40;
+        two_cbuf[i].field2.b.c = 80;
+        two_cbuf[i].field3 = 3.0F;
+        two_cbuf[i].field4.a = 4;
+        two_cbuf[i].field4.b = 8;
+    } /* end for */
+
+    /* Generate DSET_CMPD_TWO */
+    if(generate_dset(fid, DSET_CMPD_TWO, 2, cur2_dims, max2_dims, set_tid, two_cbuf) < 0)
+        goto done;
+
+    /* Closing */
+    if(H5Tclose(sub22_tid) < 0) goto done;
+    if(H5Tclose(sub2_tid) < 0) goto done;
+    if(H5Tclose(sub4_tid) < 0) goto done;
+    if(H5Tclose(set_tid) < 0) goto done;
+    if(H5Tclose(esc_sub2_tid) < 0) goto done;
+    if(H5Tclose(esc_sub4_tid) < 0) goto done;
+    if(H5Tclose(esc_set_tid) < 0) goto done;
+    if(H5Pclose(fapl) < 0) goto done;
+    if(H5Fclose(fid) < 0) goto done;
+
+    HDexit(EXIT_SUCCESS);
+
+done:
+    H5E_BEGIN_TRY
+	H5Tclose(sub22_tid);
+	H5Tclose(sub2_tid);
+	H5Tclose(sub4_tid);
+	H5Tclose(set_tid);
+	H5Tclose(esc_sub2_tid);
+	H5Tclose(esc_sub4_tid);
+	H5Tclose(esc_set_tid);
+	H5Pclose(fapl);
+	H5Fclose(fid);
+    H5E_END_TRY
+
+    HDexit(EXIT_FAILURE);
+} /* end main() */
+
diff --git a/hl/tools/h5watch/swmr_check_compat_vfd.c b/hl/tools/h5watch/swmr_check_compat_vfd.c
new file mode 100644
index 0000000..87b87c4
--- /dev/null
+++ b/hl/tools/h5watch/swmr_check_compat_vfd.c
@@ -0,0 +1,59 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * Copyright by the Board of Trustees of the University of Illinois.         *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5.  The full HDF5 copyright notice, including     *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the files COPYING and Copyright.html.  COPYING can be found at the root   *
+ * of the source code distribution tree; Copyright.html can be found at the  *
+ * root level of an installed copy of the electronic HDF5 document set and   *
+ * is linked from the top-level documents page.  It can also be found at     *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have          *
+ * access to either file, you may request a copy from help@hdfgroup.org.     *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/* Purpose:     This is a small program that checks if the HDF5_DRIVER
+ *              environment variable is set to a value that supports SWMR.
+ *              
+ *              It is intended for use in shell scripts.
+ */
+
+#include <stdlib.h>
+
+#include "H5private.h"
+
+/* This file needs to access the file driver testing code */
+#define H5FD_FRIEND		/*suppress error about including H5FDpkg	  */
+#define H5FD_TESTING
+#include "H5FDpkg.h"	/* File drivers	 			*/
+
+
+/*-------------------------------------------------------------------------
+ * Function:    main
+ *
+ * Purpose:     Inspects the HDF5_DRIVER environment variable, which
+ *              determines the VFD that the test harness will use with
+ *              the majority of the tests.
+ *
+ * Return:      VFD supports SWMR:          EXIT_SUCCESS
+ *
+ *              VFD does not support SWMR
+ *              or failure:                 EXIT_FAILURE
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main(void)
+{
+    char *driver = NULL;
+
+    driver = HDgetenv("HDF5_DRIVER");
+
+    if(H5FD_supports_swmr_test(driver))
+        return EXIT_SUCCESS;
+    else
+        return EXIT_FAILURE;
+
+} /* end main() */
+
diff --git a/hl/tools/h5watch/testh5watch.sh.in b/hl/tools/h5watch/testh5watch.sh.in
new file mode 100644
index 0000000..89fbf95
--- /dev/null
+++ b/hl/tools/h5watch/testh5watch.sh.in
@@ -0,0 +1,391 @@
+#! /bin/sh
+#
+# Copyright by The HDF Group.
+# Copyright by the Board of Trustees of the University of Illinois.
+# All rights reserved.
+#
+# This file is part of HDF5.  The full HDF5 copyright notice, including
+# terms governing use, modification, and redistribution, is contained in
+# the files COPYING and Copyright.html.  COPYING can be found at the root
+# of the source code distribution tree; Copyright.html can be found at the
+# root level of an installed copy of the electronic HDF5 document set and
+# is linked from the top-level documents page.  It can also be found at
+# http://hdfgroup.org/HDF5/doc/Copyright.html.  If you do not have
+# access to either file, you may request a copy from help@hdfgroup.org.
+#
+# Tests for the h5watch tool
+#
+
+# Check to see if the VFD specified by the HDF5_DRIVER environment variable
+# supports SWMR.
+./swmr_check_compat_vfd
+rc=$?
+if [[ $rc != 0 ]] ; then
+    echo
+    echo "The VFD specified by the HDF5_DRIVER environment variable"
+    echo "does not support SWMR."
+    echo
+    echo "h5watch tests skipped"
+    echo
+    exit 0
+fi
+
+H5WATCH=h5watch               	# The tool name
+H5WATCH_BIN=`pwd`/$H5WATCH    	# The path of H5WATCH
+EXTEND_DSET=extend_dset 	# Routine to extend the dataset when watching
+EXTEND_BIN=`pwd`/$EXTEND_DSET 	# The path of EXTEND_DSET
+#
+EXIT_SUCCESS=0
+EXIT_FAILURE=1
+#
+GEN_TEST=h5watchgentest	      	# Generate HDF5 file with various datasets
+GEN_TEST_BIN=`pwd`/$GEN_TEST 	# Path of the binary GEN_TEST
+WATCHFILE=`pwd`/WATCH.h5        # The HDF5 file generated to test h5watch
+TESTFILE=TEST.h5                # The temporary file (a copy of WATCH.h5) used by tests
+#
+# These 3 defines should be the same as the defines in ./extend_dset.c
+WRITER_MESSAGE=writer_message   # The message file created by the "extend" process
+READER_MESSAGE=reader_message   # The message file created by the "watch" process
+MESSAGE_TIMEOUT=300             # Message timeout length in secs
+#
+CMP='cmp -s'
+DIFF='diff -c'
+NLINES=20			# Max. lines of output to display if test fails
+#
+# Mac OS: just to make sure echo "backslash backslash" behaves properly
+if test `uname -s` = 'Darwin'; then
+    ECHO='/bin/echo'
+else
+    ECHO='echo'
+fi
+#
+# Global variables
+nerrors=0
+verbose=yes
+
+# The build (current) directory might be different than the source directory.
+if test -z "$srcdir"; then
+    srcdir=.
+fi
+test -d ../testfiles || mkdir ../testfiles
+
+# Print a line-line message left justified in a field of 70 characters
+# beginning with the word "Testing".
+TESTING() {
+    SPACES="                                                               "
+    $ECHO "Testing $* $SPACES" |cut -c1-70 |tr -d '\012'
+}
+
+#
+# Overall algorithm:
+#
+# Run a test and print PASSED or FAILED
+# If a test did not return with the expected return code, 
+# increment the `nerrors' global variable and (if $verbose is set) display up to $NLINES
+# lines of the actual output from the test.  
+# If the test did return the expected code,
+# compare the actual output with the expected output;
+# If the outputs are the same, print PASSED,
+# Otherwise print FAILED and the difference between the two outputs.
+# The output files are not removed if $HDF5_NOCLEANUP has a non-zero value.
+#
+#
+# TOOLTEST():
+#
+# Arguments:
+#
+# $1 -- expected output
+# $2 -- expected return code
+# $3 and on -- arguments for h5watch
+TOOLTEST() {
+    expect="$srcdir/../testfiles/$1"
+    actual="../testfiles/`basename $1 .ddl`.out"
+    actual_err="../testfiles/`basename $1 .ddl`.err"
+    shift
+    retvalexpect=$1
+    shift
+    # Run test.
+    # Stderr is included in stdout so that the diff can detect
+    # any unexpected output from that stream too.
+    TESTING $H5WATCH $@
+    (
+        $RUNSERIAL $H5WATCH_BIN "$@"
+    ) > $actual 2>$actual_err
+    exitcode=$?
+    cat $actual_err >> $actual
+    if [ $exitcode -ne $retvalexpect ]; then
+	$ECHO "*FAILED*"
+	nerrors="`expr $nerrors + 1`"
+	if [ yes = "$verbose" ]; then
+	    $ECHO "test returned with exit code $exitcode"
+	    $ECHO "test output: (up to $NLINES lines)"
+	    head -$NLINES $actual
+	    $ECHO "***end of test output***"
+	    $ECHO ""
+	fi
+    elif $CMP $expect $actual; then
+        $ECHO " PASSED"
+    else
+        $ECHO "*FAILED*"
+	$ECHO "    Expected result differs from actual result"
+	nerrors="`expr $nerrors + 1`"
+	test yes = "$verbose" && $DIFF $expect $actual |sed 's/^/    /'
+    fi
+
+    # Clean up output file
+    if test -z "$HDF5_NOCLEANUP"; then
+	rm -f $actual $actual_err
+    fi
+}
+#
+#
+#
+# TEST_WATCH():
+#
+# Arguments:
+#       $1 -- the specified dataset to watch and to extend
+#       $2 -- the options to h5watch (can be NULL)
+#       $3 -- expected output from watching the object
+#
+TEST_WATCH() {
+    cp $WATCHFILE $TESTFILE                             # Copy the file being watched/extended to a temporary file
+    actual="../testfiles/`basename $3 .ddl`.out"        # The actual output
+    expect="$srcdir/../testfiles/$3"                    # The expected output
+    #
+    # Set up options and object to h5watch
+    if test -z "$2"; then
+        OBJ="$TESTFILE/$1"                              # Empty options, just object to h5watch
+    else
+        OBJ="$2 $TESTFILE/$1"                           # Options + object to h5watch
+    fi
+    rm -f $WRITER_MESSAGE                               # Remove the file just to be sure
+    rm -f $READER_MESSAGE                               # Remove the file just to be sure
+    #
+    $EXTEND_BIN $TESTFILE $1 &                          # Extend the dataset; put in background
+    extend_pid=$!                                       # Get "extend" process ID
+    #
+    # Wait for message from "extend_dset" process to start h5watch--
+    # To wait for the writer message file or till the maximum # of seconds is reached
+    # This performs similar function as the routine h5_wait_message() in test/h5test.c
+    mexist=0                                    	# Indicate whether the message file is found
+    t0=`date +%s`                               	# Get current time in seconds
+    difft=0                                     	# Initialize the time difference
+    while [ $difft -lt $MESSAGE_TIMEOUT ] ;     	# Loop till message times out
+    do
+        t1=`date +%s`                           	# Get current time in seconds
+        difft=`expr $t1 - $t0`                  	# Calculate the time difference
+        if [ -e $WRITER_MESSAGE ]; then  		# If message file is found:
+            mexist=1                            	#       indicate the message file is found
+            rm $WRITER_MESSAGE				#       remove the message file
+            break                               	#       get out of the while loop
+        fi
+    done;
+    #
+    # If message file from "extend" process is found--
+    #   start h5watch
+    #   send message to "extend" process to start work
+    #   wait for "extend" process to complete, then kill h5watch
+    #   determine test result
+    # If message file from "extend" process is not found--
+    #   there is some problem; the test fails
+    #
+    if test $mexist -eq 0; then
+        $ECHO "*FAILED*"
+        $ECHO "Problem with extend_dset...this test failed."
+    else
+        #
+        # Run h5watch; put in background; collect output to a file
+        TESTING $H5WATCH $OBJ
+        $RUNSERIAL $H5WATCH_BIN $2 "$TESTFILE/$1" >> $actual &
+        watch_pid=$!                                    # Get h5watch process ID
+        cp /dev/null $READER_MESSAGE                    # Send message to "extend" process to start work
+        wait $extend_pid                                # Wait for "extend" process to complete
+        extend_exit=$?                                  # Collect "extend" process' exit code
+        sleep 1                                         # Sleep to make sure output is flushed
+        kill $watch_pid                              	# Kill h5watch
+	wait $watch_pid					# Wait for "h5watch" process to complete
+        #
+        if [ $extend_exit -ne 0 ]; then                 # Error returned from "extend" process
+            $ECHO "*FAILED*"
+            nerrors="`expr $nerrors + 1`"
+            if [ yes = "$verbose" ]; then
+                $ECHO "extend test returned with exit code $extend_exit"
+                $ECHO "test output: (up to $NLINES lines)"
+                head -$NLINES $actual
+                $ECHO "***end of test output***"
+                $ECHO ""
+            fi
+        elif $CMP $expect $actual; then                 # Compare actual output with expected output
+            $ECHO " PASSED"
+        else
+            $ECHO "*FAILED*"                            # Actual and expected outputs are different
+            $ECHO "    Expected result differs from actual result"
+            nerrors="`expr $nerrors + 1`"
+            if test yes = "$verbose"; then
+                        $DIFF $expect $actual |sed 's/^/    /'
+            fi
+        fi
+        #
+        # Cleaning
+        rm -f $TESTFILE
+        if test -z "$HDF5_NOCLEANUP"; then
+            rm -f $actual
+        fi
+    fi
+}
+
+##############################################################################
+##############################################################################
+###			  T H E   T E S T S                                ###
+##############################################################################
+##############################################################################
+#
+#
+#################################################################################################
+#												#
+# WATCH.h5: file with various types of datasets for testing--					#
+#   The following datasets are chunked, H5D_ALLOC_TIME_INCR, max. dimensional setting:		#
+#   	DSET_ONE: one-dimensional dataset							#
+#   	DSET_TWO: two-dimensional dataset							#
+#   	DSET_CMPD: one-dimensional dataset with compound type 					#
+#   	DSET_CMPD_ESC: one-dimensional dataset with compound type & escape/separator characters	#
+#   	DSET_CMPD_TWO: two-dimensional dataset with compound type 				#
+#												#
+#   The following datasets are one-dimensional, chunked, max. dimension setting:		#
+#   	DSET_ALLOC_EARLY: dataset with H5D_ALLOC_TIME_EARLY					#
+#   	DSET_ALLOC_LATE: dataset H5D_ALLOC_TIME_LATE						#
+#												#
+#   The following datasets are one-dimensional:							#
+#	DSET_NONE: fixed dimension setting, contiguous, H5D_ALLOC_TIME_LATE			#
+#	DSET_NOMAX: fixed dimension setting, chunked, H5D_ALLOC_TIME_INCR			#
+#											 	#
+#################################################################################################
+#
+#
+#################################################################################################
+#												#
+# Tests on expected failures:									#
+#	Invalid file name									#
+#	Unable to find dataset, invalid dataset							#
+#	  DSET_NONE and DSET_NOMAX								#
+#	Invalid input to options --width and --polling						#
+#	Invalid field names for -f option							#
+#												#
+#################################################################################################
+#
+# Generate file with various types of datasets
+$GEN_TEST_BIN
+# Test on --help options
+TOOLTEST w-help1.ddl 0 --help
+#
+# Tests on expected failures
+TOOLTEST w-err-dset1.ddl 1 WATCH.h5
+TOOLTEST w-err-dset2.ddl 1 WATCH.h5/group/DSET_CMPD
+TOOLTEST w-err-dset-none.ddl 1 WATCH.h5/DSET_NONE
+TOOLTEST w-err-dset-nomax.ddl 1 WATCH.h5/DSET_NOMAX
+TOOLTEST w-err-file.ddl 1 ../WATCH.h5/DSET_CMPD
+TOOLTEST w-err-width.ddl 1 --width=-8 WATCH.h5/DSET_ONE
+TOOLTEST w-err-poll.ddl 1 --polling=-8 WATCH.h5/DSET_ONE
+TOOLTEST w-err-poll0.ddl 1 --polling=0 WATCH.h5/DSET_ONE
+#
+# Tests on invalid field names via --fields option for a compound typed dataset: DSET_CMPD
+TOOLTEST w-err-cmpd1.ddl 1 --fields=fieldx WATCH.h5/DSET_CMPD
+TOOLTEST w-err-cmpd2.ddl 1 --fields=field1,field2. WATCH.h5/DSET_CMPD
+TOOLTEST w-err-cmpd3.ddl 1 --fields=field1,field2, WATCH.h5/DSET_CMPD
+TOOLTEST w-err-cmpd4.ddl 1 --fields=field1,field2.b.k WATCH.h5/DSET_CMPD
+TOOLTEST w-err-cmpd5.ddl 1 --fields=field1 --fields=field2.b.k WATCH.h5/DSET_CMPD
+#
+echo "DONE WITH 1st SET OF TESTS"
+#
+#
+#
+#################################
+# Tests without options         #
+#################################
+#
+# Generate file WATCH.h5 with various types of datasets,
+$GEN_TEST_BIN
+#
+# Watching and extending: (TEST.h5 is a copy of WATCH.h5)
+#       TEST.h5/DSET_ONE
+#       TEST.h5/DSET_ALLOC_EARLY
+#       TEST.h5/DSET_ALLOC_LATE
+#       TEST.h5/DSET_CMPD
+#       TEST.h5/DSET_TWO
+#       TEST.h5/DSET_CMPD_TWO
+#       TEST.h5/DSET_CMPD_ESC
+#
+TEST_WATCH DSET_ONE '' w-ext-one.ddl
+TEST_WATCH DSET_ALLOC_EARLY '' w-ext-early.ddl
+TEST_WATCH DSET_ALLOC_LATE '' w-ext-late.ddl
+TEST_WATCH DSET_CMPD '' w-ext-cmpd.ddl
+TEST_WATCH DSET_TWO '' w-ext-two.ddl
+TEST_WATCH DSET_CMPD_TWO '' w-ext-cmpd-two.ddl
+TEST_WATCH DSET_CMPD_ESC '' w-ext-cmpd-esc.ddl
+#
+echo "DONE WITH 2nd SET OF TESTS"
+#
+#
+#
+#################################
+# Tests on --fields option      #
+#################################
+#
+# Watching and extending: (TEST.h5 is a copy of WATCH.h5)
+#       TEST.h5/DSET_CMPD with --fields=field1,field2
+#       TEST.h5/DSET_CMPD with --fields=field2.b,field4
+#       TEST.h5/DSET_CMPD with --fields=field2.b.a --fields=field2.c
+TEST_WATCH DSET_CMPD --fields=field1,field2 w-ext-cmpd-f1.ddl
+TEST_WATCH DSET_CMPD --fields=field2.b,field4 w-ext-cmpd-f2.ddl
+TEST_WATCH DSET_CMPD '--fields=field2.b.a --fields=field2.c' w-ext-cmpd-ff3.ddl
+#
+#
+#       TEST.h5/DSET_CMP_TWO with --fields=field1,field2
+#       TEST.h5/DSET_CMPD_TWO with --fields=field2.b --fields=field4
+#       TEST.h5/DSET_CMPD_TWO with --fields=field2.b.a,field2.c
+TEST_WATCH DSET_CMPD_TWO --fields=field1,field2 w-ext-cmpd-two-f1.ddl
+TEST_WATCH DSET_CMPD_TWO '--fields=field2.b --fields=field4' w-ext-cmpd-two-ff2.ddl
+TEST_WATCH DSET_CMPD_TWO --fields=field2.b.a,field2.c w-ext-cmpd-two-f3.ddl
+#
+#
+#       TEST.h5/DSET_CMPD_ESC with --fields=field\,1,field2\.
+#       TEST.h5/DSET_CMPD_ESC with --fields=field2\..\,b --fields=field4\,
+#       TEST.h5/DSET_CMPD_ESC with --fields=field2\..\,b.a,field2\..\\K
+TEST_WATCH DSET_CMPD_ESC '--fields=field\,1,field2\.' w-ext-cmpd-esc-f1.ddl
+TEST_WATCH DSET_CMPD_ESC '--fields=field2\..\,b --fields=field4\,' w-ext-cmpd-esc-ff2.ddl
+TEST_WATCH DSET_CMPD_ESC '--fields=field2\..\,b.a,field2\..\\K' w-ext-cmpd-esc-f3.ddl
+#
+#
+echo "DONE WITH 3rd SET OF TESTS"
+#
+#
+#
+#################################################
+# Tests on options:                             #
+#       --dim                                   #
+#       --width, --label, --simple, --help      #
+#################################################
+#
+# Watching and extending: (TEST.h5 is a copy of WATCH.h5)
+#       TEST.h5/DSET_ONE with -d option
+#       TEST.h5/DSET_TWO with --dim option
+#       TEST.h5/DSET_TWO with --width=60 option
+#       TEST.h5/DSET_CMPD with --label option
+#       TEST.h5/DSET_ONE with --simple option
+TEST_WATCH DSET_ONE --dim w-ext-one-d.ddl
+TEST_WATCH DSET_TWO --dim w-ext-two-d.ddl
+TEST_WATCH DSET_TWO --width=30 w-ext-two-width.ddl
+TEST_WATCH DSET_CMPD --label w-ext-cmpd-label.ddl
+TEST_WATCH DSET_ONE --simple w-ext-one-simple.ddl
+#
+echo "DONE WITH 4th SET OF TESTS"
+#
+#
+#
+if test $nerrors -eq 0 ; then
+    $ECHO "All h5watch tests passed."
+    exit $EXIT_SUCCESS
+else
+    $ECHO "h5watch tests failed with $nerrors errors."
+    exit $EXIT_FAILURE
+fi
diff --git a/hl/tools/testfiles/w-err-cmpd1.ddl b/hl/tools/testfiles/w-err-cmpd1.ddl
new file mode 100644
index 0000000..775d6a0
--- /dev/null
+++ b/hl/tools/testfiles/w-err-cmpd1.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: error in processing <list_of_fields>
diff --git a/hl/tools/testfiles/w-err-cmpd2.ddl b/hl/tools/testfiles/w-err-cmpd2.ddl
new file mode 100644
index 0000000..775d6a0
--- /dev/null
+++ b/hl/tools/testfiles/w-err-cmpd2.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: error in processing <list_of_fields>
diff --git a/hl/tools/testfiles/w-err-cmpd3.ddl b/hl/tools/testfiles/w-err-cmpd3.ddl
new file mode 100644
index 0000000..775d6a0
--- /dev/null
+++ b/hl/tools/testfiles/w-err-cmpd3.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: error in processing <list_of_fields>
diff --git a/hl/tools/testfiles/w-err-cmpd4.ddl b/hl/tools/testfiles/w-err-cmpd4.ddl
new file mode 100644
index 0000000..775d6a0
--- /dev/null
+++ b/hl/tools/testfiles/w-err-cmpd4.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: error in processing <list_of_fields>
diff --git a/hl/tools/testfiles/w-err-cmpd5.ddl b/hl/tools/testfiles/w-err-cmpd5.ddl
new file mode 100644
index 0000000..775d6a0
--- /dev/null
+++ b/hl/tools/testfiles/w-err-cmpd5.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: error in processing <list_of_fields>
diff --git a/hl/tools/testfiles/w-err-dset-nomax.ddl b/hl/tools/testfiles/w-err-dset-nomax.ddl
new file mode 100644
index 0000000..b99cf84
--- /dev/null
+++ b/hl/tools/testfiles/w-err-dset-nomax.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: "/DSET_NOMAX" should have unlimited or max. dimension setting
diff --git a/hl/tools/testfiles/w-err-dset-none.ddl b/hl/tools/testfiles/w-err-dset-none.ddl
new file mode 100644
index 0000000..cbf6770
--- /dev/null
+++ b/hl/tools/testfiles/w-err-dset-none.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: "/DSET_NONE" should be a chunked or virtual dataset
diff --git a/hl/tools/testfiles/w-err-dset1.ddl b/hl/tools/testfiles/w-err-dset1.ddl
new file mode 100644
index 0000000..433c4d6
--- /dev/null
+++ b/hl/tools/testfiles/w-err-dset1.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: no dataset specified
diff --git a/hl/tools/testfiles/w-err-dset2.ddl b/hl/tools/testfiles/w-err-dset2.ddl
new file mode 100644
index 0000000..81b52de
--- /dev/null
+++ b/hl/tools/testfiles/w-err-dset2.ddl
@@ -0,0 +1,2 @@
+Opened "WATCH.h5" with sec2 driver.
+h5watch error: unable to open dataset "/group/DSET_CMPD"
diff --git a/hl/tools/testfiles/w-err-file.ddl b/hl/tools/testfiles/w-err-file.ddl
new file mode 100644
index 0000000..015661f
--- /dev/null
+++ b/hl/tools/testfiles/w-err-file.ddl
@@ -0,0 +1 @@
+h5watch error: unable to open file "../WATCH.h5/DSET_CMPD"
diff --git a/hl/tools/testfiles/w-err-poll.ddl b/hl/tools/testfiles/w-err-poll.ddl
new file mode 100644
index 0000000..e6510f2
--- /dev/null
+++ b/hl/tools/testfiles/w-err-poll.ddl
@@ -0,0 +1,35 @@
+Usage: h5watch [OPTIONS] [OBJECT]
+
+     OPTIONS
+        --help            Print a usage message and exit.
+        --version         Print version number and exit.
+        --label           Label members of compound typed dataset.
+        --simple          Use a machine-readable output format.
+        --dim             Monitor changes in size of dataset dimensions only.
+        --width=N         Set the number of columns to N for output.
+                              A value of 0 sets the number of columns to the
+                              maximum (65535). The default width is 80 columns.
+        --polling=N       Set the polling interval to N (in seconds) when the
+                              dataset will be checked for appended data.  The default
+                              polling interval is 1.
+        --fields=<list_of_fields>
+                              Display data for the fields specified in <list_of_fields>
+                              for a compound data type.  <list_of_fields> can be
+                              specified as follows:
+                                   1) A comma-separated list of field names in a
+                                   compound data type.  "," is the separator
+                                   for field names while "." is the separator
+                                   for a nested field.
+                                   2) A single field name in a compound data type.
+                                   Can use this option multiple times.
+                              Note that backslash is the escape character to avoid
+                              characters in field names that conflict with the tool's
+                              separators.
+
+     OBJECT is specified as [<filename>/<path_to_dataset>/<dsetname>]
+        <filename>            Name of the HDF5 file.  It may be preceded by path
+                              separated by slashes to the specified HDF5 file.
+        <path_to_dataset>     Path separated by slashes to the specified dataset
+        <dsetname>            Name of the dataset
+
+     User can end the h5watch process by ctrl-C (SIGINT) or kill the process (SIGTERM).
diff --git a/hl/tools/testfiles/w-err-poll0.ddl b/hl/tools/testfiles/w-err-poll0.ddl
new file mode 100644
index 0000000..e6510f2
--- /dev/null
+++ b/hl/tools/testfiles/w-err-poll0.ddl
@@ -0,0 +1,35 @@
+Usage: h5watch [OPTIONS] [OBJECT]
+
+     OPTIONS
+        --help            Print a usage message and exit.
+        --version         Print version number and exit.
+        --label           Label members of compound typed dataset.
+        --simple          Use a machine-readable output format.
+        --dim             Monitor changes in size of dataset dimensions only.
+        --width=N         Set the number of columns to N for output.
+                              A value of 0 sets the number of columns to the
+                              maximum (65535). The default width is 80 columns.
+        --polling=N       Set the polling interval to N (in seconds) when the
+                              dataset will be checked for appended data.  The default
+                              polling interval is 1.
+        --fields=<list_of_fields>
+                              Display data for the fields specified in <list_of_fields>
+                              for a compound data type.  <list_of_fields> can be
+                              specified as follows:
+                                   1) A comma-separated list of field names in a
+                                   compound data type.  "," is the separator
+                                   for field names while "." is the separator
+                                   for a nested field.
+                                   2) A single field name in a compound data type.
+                                   Can use this option multiple times.
+                              Note that backslash is the escape character to avoid
+                              characters in field names that conflict with the tool's
+                              separators.
+
+     OBJECT is specified as [<filename>/<path_to_dataset>/<dsetname>]
+        <filename>            Name of the HDF5 file.  It may be preceded by path
+                              separated by slashes to the specified HDF5 file.
+        <path_to_dataset>     Path separated by slashes to the specified dataset
+        <dsetname>            Name of the dataset
+
+     User can end the h5watch process by ctrl-C (SIGINT) or kill the process (SIGTERM).
diff --git a/hl/tools/testfiles/w-err-width.ddl b/hl/tools/testfiles/w-err-width.ddl
new file mode 100644
index 0000000..e6510f2
--- /dev/null
+++ b/hl/tools/testfiles/w-err-width.ddl
@@ -0,0 +1,35 @@
+Usage: h5watch [OPTIONS] [OBJECT]
+
+     OPTIONS
+        --help            Print a usage message and exit.
+        --version         Print version number and exit.
+        --label           Label members of compound typed dataset.
+        --simple          Use a machine-readable output format.
+        --dim             Monitor changes in size of dataset dimensions only.
+        --width=N         Set the number of columns to N for output.
+                              A value of 0 sets the number of columns to the
+                              maximum (65535). The default width is 80 columns.
+        --polling=N       Set the polling interval to N (in seconds) when the
+                              dataset will be checked for appended data.  The default
+                              polling interval is 1.
+        --fields=<list_of_fields>
+                              Display data for the fields specified in <list_of_fields>
+                              for a compound data type.  <list_of_fields> can be
+                              specified as follows:
+                                   1) A comma-separated list of field names in a
+                                   compound data type.  "," is the separator
+                                   for field names while "." is the separator
+                                   for a nested field.
+                                   2) A single field name in a compound data type.
+                                   Can use this option multiple times.
+                              Note that backslash is the escape character to avoid
+                              characters in field names that conflict with the tool's
+                              separators.
+
+     OBJECT is specified as [<filename>/<path_to_dataset>/<dsetname>]
+        <filename>            Name of the HDF5 file.  It may be preceded by path
+                              separated by slashes to the specified HDF5 file.
+        <path_to_dataset>     Path separated by slashes to the specified dataset
+        <dsetname>            Name of the dataset
+
+     User can end the h5watch process by ctrl-C (SIGINT) or kill the process (SIGTERM).
diff --git a/hl/tools/testfiles/w-ext-cmpd-esc-f1.ddl b/hl/tools/testfiles/w-ext-cmpd-esc-f1.ddl
new file mode 100644
index 0000000..d85594d
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-esc-f1.ddl
@@ -0,0 +1,11 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_ESC...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {1, {2, {2, 2, 2}, 2}}, {2, {3, {3, 3, 3}, 3}},
+        (12) {3, {4, {4, 4, 4}, 4}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {1, {2, {2, 2, 2}, 2}}, {2, {3, {3, 3, 3}, 3}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-esc-f3.ddl b/hl/tools/testfiles/w-ext-cmpd-esc-f3.ddl
new file mode 100644
index 0000000..ab6c294
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-esc-f3.ddl
@@ -0,0 +1,10 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_ESC...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {{{2}}, {2}}, {{{3}}, {3}}, {{{4}}, {4}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {{{2}}, {2}}, {{{3}}, {3}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-esc-ff2.ddl b/hl/tools/testfiles/w-ext-cmpd-esc-ff2.ddl
new file mode 100644
index 0000000..039cbf3
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-esc-ff2.ddl
@@ -0,0 +1,11 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_ESC...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {{{2, 2, 2}}, {4, 4}}, {{{3, 3, 3}}, {5, 5}}, {{{4, 4, 4}}, {6, 
+        (12)  6}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {{{2, 2, 2}}, {4, 4}}, {{{3, 3, 3}}, {5, 5}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-esc.ddl b/hl/tools/testfiles/w-ext-cmpd-esc.ddl
new file mode 100644
index 0000000..900b3f2
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-esc.ddl
@@ -0,0 +1,13 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_ESC...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {1, {2, {2, 2, 2}, 2}, 3, {4, 4}},
+        (11) {2, {3, {3, 3, 3}, 3}, 4, {5, 5}},
+        (12) {3, {4, {4, 4, 4}, 4}, 5, {6, 6}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {1, {2, {2, 2, 2}, 2}, 3, {4, 4}}, {2, {3, {3, 3, 3}, 3}, 4, {5, 
+        (2)  5}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-f1.ddl b/hl/tools/testfiles/w-ext-cmpd-f1.ddl
new file mode 100644
index 0000000..7e0a066
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-f1.ddl
@@ -0,0 +1,11 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {1, {2, {2, 2, 2}, 2}}, {2, {3, {3, 3, 3}, 3}},
+        (12) {3, {4, {4, 4, 4}, 4}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {1, {2, {2, 2, 2}, 2}}, {2, {3, {3, 3, 3}, 3}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-f2.ddl b/hl/tools/testfiles/w-ext-cmpd-f2.ddl
new file mode 100644
index 0000000..ea69222
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-f2.ddl
@@ -0,0 +1,11 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {{{2, 2, 2}}, {4, 4}}, {{{3, 3, 3}}, {5, 5}}, {{{4, 4, 4}}, {6, 
+        (12)  6}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {{{2, 2, 2}}, {4, 4}}, {{{3, 3, 3}}, {5, 5}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-ff3.ddl b/hl/tools/testfiles/w-ext-cmpd-ff3.ddl
new file mode 100644
index 0000000..84e2919
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-ff3.ddl
@@ -0,0 +1,10 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {{{2}}, {2}}, {{{3}}, {3}}, {{{4}}, {4}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {{{2}}, {2}}, {{{3}}, {3}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-label.ddl b/hl/tools/testfiles/w-ext-cmpd-label.ddl
new file mode 100644
index 0000000..84534ea
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-label.ddl
@@ -0,0 +1,18 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {field1=1, field2={a=2, b={a=2, b=2, c=2}, c=2}, field3=3, 
+        (10)  field4={a=4, b=4}},
+        (11) {field1=2, field2={a=3, b={a=3, b=3, c=3}, c=3}, field3=4, 
+        (11)  field4={a=5, b=5}},
+        (12) {field1=3, field2={a=4, b={a=4, b=4, c=4}, c=4}, field3=5, 
+        (12)  field4={a=6, b=6}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {field1=1, field2={a=2, b={a=2, b=2, c=2}, c=2}, field3=3, 
+        (1)  field4={a=4, b=4}},
+        (2) {field1=2, field2={a=3, b={a=3, b=3, c=3}, c=3}, field3=4, 
+        (2)  field4={a=5, b=5}}
diff --git a/hl/tools/testfiles/w-ext-cmpd-two-f1.ddl b/hl/tools/testfiles/w-ext-cmpd-two-f1.ddl
new file mode 100644
index 0000000..49abde9
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-two-f1.ddl
@@ -0,0 +1,47 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+    Data:
+        (0,10) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}}
+        (1,10) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}}
+        (2,10) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}}
+        (3,10) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}}
+        (4,0) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (4,2) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (4,4) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (4,6) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (4,8) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (4,10) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (5,0) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (5,2) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (5,4) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (5,6) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (5,8) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}},
+        (5,10) {1, {1, {1, 1, 1}, 1}}, {1, {1, {1, 1, 1}, 1}}
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+    Data:
+        (6,0) {2, {2, {2, 2, 2}, 2}},
+        (7,0) {2, {2, {2, 2, 2}, 2}}
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+    Data:
+        (8,0) {3, {3, {3, 3, 3}, 3}},
+        (9,0) {3, {3, {3, 3, 3}, 3}}
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+    Data:
+        (0,1) {4, {4, {4, 4, 4}, 4}}, {4, {4, {4, 4, 4}, 4}}
+        (1,1) {4, {4, {4, 4, 4}, 4}}, {4, {4, {4, 4, 4}, 4}}
+        (2,1) {4, {4, {4, 4, 4}, 4}}, {4, {4, {4, 4, 4}, 4}}
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+    Data:
+        (0,2) {7, {7, {7, 7, 7}, 7}}, {7, {7, {7, 7, 7}, 7}}
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-ext-cmpd-two-f3.ddl b/hl/tools/testfiles/w-ext-cmpd-two-f3.ddl
new file mode 100644
index 0000000..0878f35
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-two-f3.ddl
@@ -0,0 +1,41 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+    Data:
+        (0,10) {{{1}}, {1}}, {{{1}}, {1}}
+        (1,10) {{{1}}, {1}}, {{{1}}, {1}}
+        (2,10) {{{1}}, {1}}, {{{1}}, {1}}
+        (3,10) {{{1}}, {1}}, {{{1}}, {1}}
+        (4,0) {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}},
+        (4,4) {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}},
+        (4,8) {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}},
+        (5,0) {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}},
+        (5,4) {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}},
+        (5,8) {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}, {{{1}}, {1}}
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+    Data:
+        (6,0) {{{2}}, {2}},
+        (7,0) {{{2}}, {2}}
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+    Data:
+        (8,0) {{{3}}, {3}},
+        (9,0) {{{3}}, {3}}
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+    Data:
+        (0,1) {{{4}}, {4}}, {{{4}}, {4}}
+        (1,1) {{{4}}, {4}}, {{{4}}, {4}}
+        (2,1) {{{4}}, {4}}, {{{4}}, {4}}
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+    Data:
+        (0,2) {{{7}}, {7}}, {{{7}}, {7}}
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-ext-cmpd-two-ff2.ddl b/hl/tools/testfiles/w-ext-cmpd-two-ff2.ddl
new file mode 100644
index 0000000..669547e
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-two-ff2.ddl
@@ -0,0 +1,47 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+    Data:
+        (0,10) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}}
+        (1,10) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}}
+        (2,10) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}}
+        (3,10) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}}
+        (4,0) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (4,2) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (4,4) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (4,6) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (4,8) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (4,10) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (5,0) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (5,2) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (5,4) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (5,6) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (5,8) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}},
+        (5,10) {{{1, 1, 1}}, {1, 1}}, {{{1, 1, 1}}, {1, 1}}
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+    Data:
+        (6,0) {{{2, 2, 2}}, {2, 2}},
+        (7,0) {{{2, 2, 2}}, {2, 2}}
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+    Data:
+        (8,0) {{{3, 3, 3}}, {3, 3}},
+        (9,0) {{{3, 3, 3}}, {3, 3}}
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+    Data:
+        (0,1) {{{4, 4, 4}}, {4, 4}}, {{{4, 4, 4}}, {4, 4}}
+        (1,1) {{{4, 4, 4}}, {4, 4}}, {{{4, 4, 4}}, {4, 4}}
+        (2,1) {{{4, 4, 4}}, {4, 4}}, {{{4, 4, 4}}, {4, 4}}
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+    Data:
+        (0,2) {{{7, 7, 7}}, {7, 7}}, {{{7, 7, 7}}, {7, 7}}
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-ext-cmpd-two.ddl b/hl/tools/testfiles/w-ext-cmpd-two.ddl
new file mode 100644
index 0000000..a461226
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd-two.ddl
@@ -0,0 +1,67 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+    Data:
+        (0,10) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (0,11) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}}
+        (1,10) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (1,11) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}}
+        (2,10) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (2,11) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}}
+        (3,10) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (3,11) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}}
+        (4,0) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,1) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,2) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,3) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,4) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,5) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,6) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,7) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,8) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,9) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,10) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (4,11) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,0) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,1) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,2) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,3) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,4) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,5) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,6) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,7) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,8) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,9) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,10) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}},
+        (5,11) {1, {1, {1, 1, 1}, 1}, 1, {1, 1}}
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+    Data:
+        (6,0) {2, {2, {2, 2, 2}, 2}, 2, {2, 2}},
+        (7,0) {2, {2, {2, 2, 2}, 2}, 2, {2, 2}}
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+    Data:
+        (8,0) {3, {3, {3, 3, 3}, 3}, 3, {3, 3}},
+        (9,0) {3, {3, {3, 3, 3}, 3}, 3, {3, 3}}
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+    Data:
+        (0,1) {4, {4, {4, 4, 4}, 4}, 4, {4, 4}},
+        (0,2) {4, {4, {4, 4, 4}, 4}, 4, {4, 4}}
+        (1,1) {4, {4, {4, 4, 4}, 4}, 4, {4, 4}},
+        (1,2) {4, {4, {4, 4, 4}, 4}, 4, {4, 4}}
+        (2,1) {4, {4, {4, 4, 4}, 4}, 4, {4, 4}},
+        (2,2) {4, {4, {4, 4, 4}, 4}, 4, {4, 4}}
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+    Data:
+        (0,2) {7, {7, {7, 7, 7}, 7}, 7, {7, 7}},
+        (0,3) {7, {7, {7, 7, 7}, 7}, 7, {7, 7}}
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-ext-cmpd.ddl b/hl/tools/testfiles/w-ext-cmpd.ddl
new file mode 100644
index 0000000..7e64a14
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-cmpd.ddl
@@ -0,0 +1,13 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_CMPD...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) {1, {2, {2, 2, 2}, 2}, 3, {4, 4}},
+        (11) {2, {3, {3, 3, 3}, 3}, 4, {5, 5}},
+        (12) {3, {4, {4, 4, 4}, 4}, 5, {6, 6}}
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) {1, {2, {2, 2, 2}, 2}, 3, {4, 4}}, {2, {3, {3, 3, 3}, 3}, 4, {5, 
+        (2)  5}}
diff --git a/hl/tools/testfiles/w-ext-early.ddl b/hl/tools/testfiles/w-ext-early.ddl
new file mode 100644
index 0000000..1d963d7
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-early.ddl
@@ -0,0 +1,10 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_ALLOC_EARLY...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) 0, 1, 2
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) 0, 1
diff --git a/hl/tools/testfiles/w-ext-late.ddl b/hl/tools/testfiles/w-ext-late.ddl
new file mode 100644
index 0000000..f3a7cf2
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-late.ddl
@@ -0,0 +1,10 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_ALLOC_LATE...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) 0, 1, 2
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) 0, 1
diff --git a/hl/tools/testfiles/w-ext-one-d.ddl b/hl/tools/testfiles/w-ext-one-d.ddl
new file mode 100644
index 0000000..249ff95
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-one-d.ddl
@@ -0,0 +1,6 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_ONE...
+dimension 0: 10->13 (increases)
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
diff --git a/hl/tools/testfiles/w-ext-one-simple.ddl b/hl/tools/testfiles/w-ext-one-simple.ddl
new file mode 100644
index 0000000..3bf0ef5
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-one-simple.ddl
@@ -0,0 +1,13 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_ONE...
+dimension 0: 10->13 (increases)
+    Data:
+        0 
+        1 
+        2
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        0 
+        1
diff --git a/hl/tools/testfiles/w-ext-one.ddl b/hl/tools/testfiles/w-ext-one.ddl
new file mode 100644
index 0000000..c4e75eb
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-one.ddl
@@ -0,0 +1,10 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_ONE...
+dimension 0: 10->13 (increases)
+    Data:
+        (10) 0, 1, 2
+dimension 0: 13->12 (decreases)
+dimension 0: 12->1 (decreases)
+dimension 0: 1->3 (increases)
+    Data:
+        (1) 0, 1
diff --git a/hl/tools/testfiles/w-ext-two-d.ddl b/hl/tools/testfiles/w-ext-two-d.ddl
new file mode 100644
index 0000000..b71a9a6
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-two-d.ddl
@@ -0,0 +1,18 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-ext-two-width.ddl b/hl/tools/testfiles/w-ext-two-width.ddl
new file mode 100644
index 0000000..52903de
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-two-width.ddl
@@ -0,0 +1,41 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+    Data:
+        (0,10) 1, 1
+        (1,10) 1, 1
+        (2,10) 1, 1
+        (3,10) 1, 1
+        (4,0) 1, 1, 1, 1, 1,
+        (4,5) 1, 1, 1, 1, 1,
+        (4,10) 1, 1,
+        (5,0) 1, 1, 1, 1, 1,
+        (5,5) 1, 1, 1, 1, 1,
+        (5,10) 1, 1
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+    Data:
+        (6,0) 2,
+        (7,0) 2
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+    Data:
+        (8,0) 3,
+        (9,0) 3
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+    Data:
+        (0,1) 4, 4
+        (1,1) 4, 4
+        (2,1) 4, 4
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+    Data:
+        (0,2) 7, 7
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-ext-two.ddl b/hl/tools/testfiles/w-ext-two.ddl
new file mode 100644
index 0000000..31df8d5
--- /dev/null
+++ b/hl/tools/testfiles/w-ext-two.ddl
@@ -0,0 +1,37 @@
+Opened "TEST.h5" with sec2 driver.
+Monitoring dataset /DSET_TWO...
+dimension 0: 4->6 (increases)
+dimension 1: 10->12 (increases)
+    Data:
+        (0,10) 1, 1
+        (1,10) 1, 1
+        (2,10) 1, 1
+        (3,10) 1, 1
+        (4,0) 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+        (5,0) 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1
+dimension 0: 6->8 (increases)
+dimension 1: 12->1 (decreases)
+    Data:
+        (6,0) 2,
+        (7,0) 2
+dimension 0: 8->10 (increases)
+dimension 1: 1->1 (unchanged)
+    Data:
+        (8,0) 3,
+        (9,0) 3
+dimension 0: 10->3 (decreases)
+dimension 1: 1->3 (increases)
+    Data:
+        (0,1) 4, 4
+        (1,1) 4, 4
+        (2,1) 4, 4
+dimension 0: 3->2 (decreases)
+dimension 1: 3->2 (decreases)
+dimension 0: 2->1 (decreases)
+dimension 1: 2->2 (unchanged)
+dimension 0: 1->1 (unchanged)
+dimension 1: 2->4 (increases)
+    Data:
+        (0,2) 7, 7
+dimension 0: 1->1 (unchanged)
+dimension 1: 4->3 (decreases)
diff --git a/hl/tools/testfiles/w-help1.ddl b/hl/tools/testfiles/w-help1.ddl
new file mode 100644
index 0000000..e6510f2
--- /dev/null
+++ b/hl/tools/testfiles/w-help1.ddl
@@ -0,0 +1,35 @@
+Usage: h5watch [OPTIONS] [OBJECT]
+
+     OPTIONS
+        --help            Print a usage message and exit.
+        --version         Print version number and exit.
+        --label           Label members of compound typed dataset.
+        --simple          Use a machine-readable output format.
+        --dim             Monitor changes in size of dataset dimensions only.
+        --width=N         Set the number of columns to N for output.
+                              A value of 0 sets the number of columns to the
+                              maximum (65535). The default width is 80 columns.
+        --polling=N       Set the polling interval to N (in seconds) when the
+                              dataset will be checked for appended data.  The default
+                              polling interval is 1.
+        --fields=<list_of_fields>
+                              Display data for the fields specified in <list_of_fields>
+                              for a compound data type.  <list_of_fields> can be
+                              specified as follows:
+                                   1) A comma-separated list of field names in a
+                                   compound data type.  "," is the separator
+                                   for field names while "." is the separator
+                                   for a nested field.
+                                   2) A single field name in a compound data type.
+                                   Can use this option multiple times.
+                              Note that backslash is the escape character to avoid
+                              characters in field names that conflict with the tool's
+                              separators.
+
+     OBJECT is specified as [<filename>/<path_to_dataset>/<dsetname>]
+        <filename>            Name of the HDF5 file.  It may be preceded by path
+                              separated by slashes to the specified HDF5 file.
+        <path_to_dataset>     Path separated by slashes to the specified dataset
+        <dsetname>            Name of the dataset
+
+     User can end the h5watch process by ctrl-C (SIGINT) or kill the process (SIGTERM).