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[Libguestfs] [PATCH v8 04/42] mllib: Split ‘Common_utils’ into ‘Std_utils’ + ‘Common_utils’.



The new module ‘Std_utils’ contains only functions which are pure
OCaml and depend only on the OCaml stdlib.  Therefore these functions
may be used by the generator.

The new module is moved to ‘common/mlstdutils’.

This also removes the "<stdlib>" hack, and the code which copied the
library around.

Also ‘Guestfs_config’, ‘Libdir’ and ‘StringMap’ modules are moved
since these are essentially the same.

The bulk of this change is just updating files which use
‘open Common_utils’ to add ‘open Std_utils’ where necessary.
---
 .gitignore                                        |   8 +-
 Makefile.am                                       |   2 +-
 builder/Makefile.am                               |  12 +-
 builder/builder.ml                                |   1 +
 builder/cache.ml                                  |   3 +-
 builder/cmdline.ml                                |   3 +-
 builder/downloader.ml                             |   3 +-
 builder/index.ml                                  |   3 +-
 builder/index_parser.ml                           |   3 +-
 builder/ini_reader.ml                             |   1 +
 builder/languages.ml                              |   1 +
 builder/list_entries.ml                           |   3 +-
 builder/paths.ml                                  |   1 +
 builder/sigchecker.ml                             |   3 +-
 builder/simplestreams_parser.ml                   |   3 +-
 builder/sources.ml                                |   3 +-
 builder/yajl.ml                                   |   3 +-
 common/mlstdutils/Makefile.am                     | 151 +++++
 common/mlstdutils/dummy.c                         |   2 +
 {mllib => common/mlstdutils}/guestfs_config.ml.in |   0
 common/mlstdutils/std_utils.ml                    | 664 +++++++++++++++++++++
 common/mlstdutils/std_utils.mli                   | 338 +++++++++++
 common/mlstdutils/std_utils_tests.ml              |  95 +++
 {mllib => common/mlstdutils}/stringMap.ml         |   0
 {mllib => common/mlstdutils}/stringMap.mli        |   0
 configure.ac                                      |   3 +-
 customize/Makefile.am                             |   8 +-
 customize/SELinux_relabel.ml                      |   3 +-
 customize/append_line.ml                          |   1 +
 customize/customize_main.ml                       |   3 +-
 customize/customize_run.ml                        |   3 +-
 customize/firstboot.ml                            |   1 +
 customize/hostname.ml                             |   1 +
 customize/password.ml                             |   3 +-
 customize/perl_edit.ml                            |   1 +
 customize/ssh_key.ml                              |   7 +-
 customize/subscription_manager.ml                 |   3 +-
 dib/Makefile.am                                   |  10 +-
 dib/cmdline.ml                                    |   3 +-
 dib/dib.ml                                        |   3 +-
 dib/elements.ml                                   |   3 +-
 dib/output_format.ml                              |   1 +
 dib/output_format_qcow2.ml                        |   1 +
 dib/utils.ml                                      |   3 +-
 docs/C_SOURCE_FILES                               |   1 +
 docs/guestfs-hacking.pod                          |   4 +
 generator/GObject.ml                              |   2 +-
 generator/Makefile.am                             |  34 +-
 generator/OCaml.ml                                |   2 +-
 generator/UEFI.ml                                 |   2 +-
 generator/XDR.ml                                  |   2 +-
 generator/actions.ml                              |   2 +-
 generator/authors.ml                              |   2 +-
 generator/bindtests.ml                            |   2 +-
 generator/c.ml                                    |   2 +-
 generator/checks.ml                               |   2 +-
 generator/csharp.ml                               |   2 +-
 generator/customize.ml                            |   3 +-
 generator/daemon.ml                               |   2 +-
 generator/docstrings.ml                           |   2 +-
 generator/erlang.ml                               |   2 +-
 generator/errnostring.ml                          |   2 +-
 generator/events.ml                               |   2 +-
 generator/fish.ml                                 |   2 +-
 generator/golang.ml                               |   2 +-
 generator/haskell.ml                              |   2 +-
 generator/java.ml                                 |   2 +-
 generator/lua.ml                                  |   2 +-
 generator/main.ml                                 |   2 +-
 generator/optgroups.ml                            |   2 +-
 generator/perl.ml                                 |   2 +-
 generator/php.ml                                  |   2 +-
 generator/pr.ml                                   |   2 +-
 generator/python.ml                               |   2 +-
 generator/ruby.ml                                 |   2 +-
 generator/structs.ml                              |   2 +-
 generator/tests_c_api.ml                          |   2 +-
 generator/utils.ml                                |   2 +-
 get-kernel/Makefile.am                            |  10 +-
 get-kernel/get_kernel.ml                          |   3 +-
 mllib/Makefile.am                                 |  25 +-
 mllib/checksums.ml                                |   3 +-
 mllib/common_utils.ml                             | 676 +---------------------
 mllib/common_utils.mli                            | 347 -----------
 mllib/common_utils_tests.ml                       |  61 +-
 mllib/curl.ml                                     |   1 +
 mllib/getopt_tests.ml                             |   1 +
 mllib/regedit.ml                                  |   1 +
 mllib/registry.ml                                 |   3 +-
 mllib/xpath_helpers.ml                            |   3 +-
 resize/Makefile.am                                |   5 +-
 resize/resize.ml                                  |   1 +
 sparsify/Makefile.am                              |   5 +-
 sparsify/cmdline.ml                               |   3 +-
 sparsify/copying.ml                               |   1 +
 sparsify/in_place.ml                              |   1 +
 sparsify/utils.ml                                 |   2 +-
 sysprep/Makefile.am                               |   5 +-
 sysprep/main.ml                                   |   1 +
 sysprep/sysprep_operation.ml                      |   4 +-
 sysprep/sysprep_operation_backup_files.ml         |   3 +-
 sysprep/sysprep_operation_cron_spool.ml           |   6 +-
 sysprep/sysprep_operation_net_hostname.ml         |   4 +-
 sysprep/sysprep_operation_net_hwaddr.ml           |   4 +-
 sysprep/sysprep_operation_script.ml               |   3 +-
 sysprep/sysprep_operation_user_account.ml         |   1 +
 v2v/DOM.ml                                        |   1 +
 v2v/Makefile.am                                   |   6 +-
 v2v/changeuid.ml                                  |   3 +-
 v2v/cmdline.ml                                    |   3 +-
 v2v/convert_linux.ml                              |   3 +-
 v2v/convert_windows.ml                            |   3 +-
 v2v/copy_to_local.ml                              |   3 +-
 v2v/create_libvirt_xml.ml                         |   3 +-
 v2v/create_ovf.ml                                 |   7 +-
 v2v/input_disk.ml                                 |   3 +-
 v2v/input_libvirtxml.ml                           |   3 +-
 v2v/input_ova.ml                                  |   3 +-
 v2v/input_vmx.ml                                  |   3 +-
 v2v/inspect_source.ml                             |   1 +
 v2v/linux.ml                                      |   3 +-
 v2v/linux_bootloaders.ml                          |   3 +-
 v2v/linux_kernels.ml                              |   3 +-
 v2v/modules_list.ml                               |   2 +-
 v2v/output_glance.ml                              |   3 +-
 v2v/output_libvirt.ml                             |   3 +-
 v2v/output_local.ml                               |   3 +-
 v2v/output_null.ml                                |   3 +-
 v2v/output_qemu.ml                                |   3 +-
 v2v/output_rhv.ml                                 |   3 +-
 v2v/output_vdsm.ml                                |   3 +-
 v2v/parse_libvirt_xml.ml                          |   7 +-
 v2v/parse_ovf_from_ova.ml                         |   3 +-
 v2v/parse_vmx.ml                                  |   1 +
 v2v/target_bus_assignment.ml                      |   1 +
 v2v/test-harness/Makefile.am                      |   3 +-
 v2v/test-harness/v2v_test_harness.ml              |   1 +
 v2v/utils.ml                                      |   3 +-
 v2v/v2v.ml                                        |   3 +-
 v2v/v2v_unit_tests.ml                             |   8 +-
 v2v/vCenter.ml                                    |   1 +
 v2v/windows_virtio.ml                             |   3 +-
 142 files changed, 1526 insertions(+), 1237 deletions(-)

diff --git a/.gitignore b/.gitignore
index 80637523d..3cd1fbb0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -124,6 +124,11 @@ Makefile.in
 /common/errnostring/errnostring.h
 /common/miniexpect/miniexpect.3
 /common/mlprogress/.depend
+/common/mlstdutils/.depend
+/common/mlstdutils/guestfs_config.ml
+/common/mlstdutils/libdir.ml
+/common/mlstdutils/oUnit-*
+/common/mlstdutils/std_utils_tests
 /common/mlvisit/.depend
 /common/mlvisit/visit_tests
 /common/mlxml/.depend
@@ -273,7 +278,6 @@ Makefile.in
 /generator/common_utils.mli
 /generator/files-generated.txt
 /generator/generator
-/generator/guestfs_config.ml
 /generator/.pod2text.data*
 /generator/stamp-generator
 /get-kernel/.depend
@@ -361,9 +365,7 @@ Makefile.in
 /mllib/common_gettext.ml
 /mllib/common_utils_tests
 /mllib/getopt_tests
-/mllib/guestfs_config.ml
 /mllib/JSON_tests
-/mllib/libdir.ml
 /mllib/oUnit-*
 /ocaml/bindtests.bc
 /ocaml/bindtests.opt
diff --git a/Makefile.am b/Makefile.am
index 48f538475..64ac23f2e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -20,7 +20,7 @@ include $(top_srcdir)/common-rules.mk
 ACLOCAL_AMFLAGS = -I m4
 
 # The generator - must be before anything else.
-SUBDIRS = generator
+SUBDIRS = common/mlstdutils generator
 
 # Must be the first tests that run.
 if ENABLE_APPLIANCE
diff --git a/builder/Makefile.am b/builder/Makefile.am
index d56b394b7..5f0606ca4 100644
--- a/builder/Makefile.am
+++ b/builder/Makefile.am
@@ -124,6 +124,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/mllib \
 	-I $(top_builddir)/customize
 OCAMLPACKAGES_TESTS =
@@ -153,10 +154,16 @@ else
 OBJECTS = $(XOBJECTS)
 endif
 
-OCAMLLINKFLAGS = mlguestfs.$(MLARCHIVE) mllib.$(MLARCHIVE) customize.$(MLARCHIVE) $(LINK_CUSTOM_OCAMLC_ONLY)
+OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
+	mlguestfs.$(MLARCHIVE) \
+	mllib.$(MLARCHIVE) \
+	customize.$(MLARCHIVE) \
+	$(LINK_CUSTOM_OCAMLC_ONLY)
 
 virt_builder_DEPENDENCIES = \
 	$(OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	../customize/customize.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
@@ -228,6 +235,7 @@ endif
 
 yajl_tests_DEPENDENCIES = \
 	$(yajl_tests_THEOBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	../customize/customize.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
@@ -299,7 +307,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mlstdutils -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/builder/builder.ml b/builder/builder.ml
index b0a48ea89..0e02bab3b 100644
--- a/builder/builder.ml
+++ b/builder/builder.ml
@@ -20,6 +20,7 @@ open Common_gettext.Gettext
 
 module G = Guestfs
 
+open Std_utils
 open Common_utils
 open Unix_utils
 open Password
diff --git a/builder/cache.ml b/builder/cache.ml
index 19fcd15e2..494796edb 100644
--- a/builder/cache.ml
+++ b/builder/cache.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/builder/cmdline.ml b/builder/cmdline.ml
index f20c0936c..a1f901144 100644
--- a/builder/cmdline.ml
+++ b/builder/cmdline.ml
@@ -18,8 +18,9 @@
 
 (* Command line argument parsing. *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Customize_cmdline
diff --git a/builder/downloader.ml b/builder/downloader.ml
index ef3cd67cb..d6b27c8c7 100644
--- a/builder/downloader.ml
+++ b/builder/downloader.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/builder/index.ml b/builder/index.ml
index 8c59de651..54af6e719 100644
--- a/builder/index.ml
+++ b/builder/index.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/builder/index_parser.ml b/builder/index_parser.ml
index 468805cf8..fb546831f 100644
--- a/builder/index_parser.ml
+++ b/builder/index_parser.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/builder/ini_reader.ml b/builder/ini_reader.ml
index 0470d173d..2d8ff7e59 100644
--- a/builder/ini_reader.ml
+++ b/builder/ini_reader.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 
 type sections = section list
diff --git a/builder/languages.ml b/builder/languages.ml
index 66f49cb06..d94f97c5c 100644
--- a/builder/languages.ml
+++ b/builder/languages.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 
 let split_locale loc =
diff --git a/builder/list_entries.ml b/builder/list_entries.ml
index 2a1aef4c8..ea607107c 100644
--- a/builder/list_entries.ml
+++ b/builder/list_entries.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Printf
 
diff --git a/builder/paths.ml b/builder/paths.ml
index cbd9d4bd0..e0fb9a024 100644
--- a/builder/paths.ml
+++ b/builder/paths.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 
 let xdg_cache_home =
diff --git a/builder/sigchecker.ml b/builder/sigchecker.ml
index 6c1e691ee..f72c21ab0 100644
--- a/builder/sigchecker.ml
+++ b/builder/sigchecker.ml
@@ -16,9 +16,10 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/builder/simplestreams_parser.ml b/builder/simplestreams_parser.ml
index 8844d476b..c550675ba 100644
--- a/builder/simplestreams_parser.ml
+++ b/builder/simplestreams_parser.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Yajl
 open Utils
diff --git a/builder/sources.ml b/builder/sources.ml
index 290151c3a..4c9ea0fff 100644
--- a/builder/sources.ml
+++ b/builder/sources.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Printf
 open Unix
diff --git a/builder/yajl.ml b/builder/yajl.ml
index d933b5246..5ae1c5d9b 100644
--- a/builder/yajl.ml
+++ b/builder/yajl.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 type yajl_val =
 | Yajl_null
diff --git a/common/mlstdutils/Makefile.am b/common/mlstdutils/Makefile.am
new file mode 100644
index 000000000..9e0b34d42
--- /dev/null
+++ b/common/mlstdutils/Makefile.am
@@ -0,0 +1,151 @@
+# libguestfs OCaml tools common code
+# Copyright (C) 2011-2017 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+include $(top_srcdir)/subdir-rules.mk
+
+EXTRA_DIST = \
+	$(SOURCES_MLI) \
+	$(SOURCES_ML) \
+	std_utils_tests.ml
+
+SOURCES_MLI = \
+	std_utils.mli \
+	stringMap.mli
+
+SOURCES_ML = \
+	guestfs_config.ml \
+	$(OCAML_BYTES_COMPAT_ML) \
+	libdir.ml \
+	stringMap.ml \
+	std_utils.ml
+
+if HAVE_OCAML
+
+# We pretend that we're building a C library.  automake handles the
+# compilation of the C sources for us.  At the end we take the C
+# objects and OCaml objects and link them into the OCaml library.
+# This C library is never used.
+
+noinst_LIBRARIES = libmlstdutils.a
+
+if !HAVE_OCAMLOPT
+MLSTDUTILS_CMA = mlstdutils.cma
+else
+MLSTDUTILS_CMA = mlstdutils.cmxa
+endif
+
+noinst_DATA = $(MLSTDUTILS_CMA)
+
+libmlstdutils_a_SOURCES = dummy.c
+libmlstdutils_a_CPPFLAGS = \
+	-I. \
+	-I$(top_builddir)
+libmlstdutils_a_CFLAGS = \
+	$(WARN_CFLAGS) $(WERROR_CFLAGS) \
+	-fPIC
+
+BOBJECTS = $(SOURCES_ML:.ml=.cmo)
+XOBJECTS = $(BOBJECTS:.cmo=.cmx)
+
+OCAMLPACKAGES = \
+	-package str,unix \
+	-I $(builddir)
+OCAMLPACKAGES_TESTS = $(MLSTDUTILS_CMA)
+if HAVE_OCAML_PKG_OUNIT
+OCAMLPACKAGES_TESTS += -package oUnit
+endif
+
+OCAMLFLAGS = $(OCAML_FLAGS) $(OCAML_WARN_ERROR)
+
+if !HAVE_OCAMLOPT
+OBJECTS = $(BOBJECTS)
+else
+OBJECTS = $(XOBJECTS)
+endif
+
+libmlstdutils_a_DEPENDENCIES = $(OBJECTS)
+
+$(MLSTDUTILS_CMA): $(OBJECTS)
+	$(OCAMLFIND) mklib $(OCAMLPACKAGES) $(OBJECTS) -o mlstdutils
+
+# This OCaml module has to be generated by make (configure will put
+# unexpanded prefix macro in).
+
+libdir.ml: Makefile
+	echo 'let libdir = "$(libdir)"' > $ -t
+	mv $ -t $@
+
+# Tests.
+
+std_utils_tests_SOURCES = dummy.c
+std_utils_tests_CPPFLAGS = \
+	-I. \
+	-I$(top_builddir)
+std_utils_tests_BOBJECTS = std_utils_tests.cmo
+std_utils_tests_XOBJECTS = $(std_utils_tests_BOBJECTS:.cmo=.cmx)
+
+# Can't call the following as <test>_OBJECTS because automake gets confused.
+if !HAVE_OCAMLOPT
+std_utils_tests_THEOBJECTS = $(std_utils_tests_BOBJECTS)
+std_utils_tests.cmo: OCAMLPACKAGES += $(OCAMLPACKAGES_TESTS)
+else
+std_utils_tests_THEOBJECTS = $(std_utils_tests_XOBJECTS)
+std_utils_tests.cmx: OCAMLPACKAGES += $(OCAMLPACKAGES_TESTS)
+endif
+
+OCAMLLINKFLAGS = $(LINK_CUSTOM_OCAMLC_ONLY)
+
+std_utils_tests_DEPENDENCIES = \
+	$(std_utils_tests_THEOBJECTS) \
+	$(MLSTDUTILS_CMA) \
+	$(top_srcdir)/ocaml-link.sh
+std_utils_tests_LINK = \
+	$(top_srcdir)/ocaml-link.sh -- \
+	  $(OCAMLFIND) $(BEST) $(OCAMLFLAGS) $(OCAMLLINKFLAGS) \
+	  $(OCAMLPACKAGES) $(OCAMLPACKAGES_TESTS) \
+	  $(std_utils_tests_THEOBJECTS) -o $@
+
+TESTS_ENVIRONMENT = $(top_builddir)/run --test
+
+TESTS =
+check_PROGRAMS =
+
+if HAVE_OCAML_PKG_OUNIT
+check_PROGRAMS += std_utils_tests
+TESTS += std_utils_tests
+endif
+
+check-valgrind:
+	$(MAKE) VG="@VG@" check
+
+# Dependencies.
+depend: .depend
+
+.depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
+	rm -f $@ $ -t
+	$(OCAMLFIND) ocamldep -I $(abs_srcdir) $^ | \
+	  $(SED) 's/ *$$//' | \
+	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
+	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
+	  sort > $ -t
+	mv $ -t $@
+
+-include .depend
+
+endif
+
+.PHONY: depend docs
diff --git a/common/mlstdutils/dummy.c b/common/mlstdutils/dummy.c
new file mode 100644
index 000000000..ebab6198c
--- /dev/null
+++ b/common/mlstdutils/dummy.c
@@ -0,0 +1,2 @@
+/* Dummy source, to be used for OCaml-based tools with no C sources. */
+enum { foo = 1 };
diff --git a/mllib/guestfs_config.ml.in b/common/mlstdutils/guestfs_config.ml.in
similarity index 100%
rename from mllib/guestfs_config.ml.in
rename to common/mlstdutils/guestfs_config.ml.in
diff --git a/common/mlstdutils/std_utils.ml b/common/mlstdutils/std_utils.ml
new file mode 100644
index 000000000..b91785a9c
--- /dev/null
+++ b/common/mlstdutils/std_utils.ml
@@ -0,0 +1,664 @@
+(* Common utilities for OCaml tools in libguestfs.
+ * Copyright (C) 2010-2017 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+open Printf
+
+module Char = struct
+    include Char
+
+    let lowercase_ascii c =
+      if (c >= 'A' && c <= 'Z')
+      then unsafe_chr (code c + 32)
+      else c
+
+    let uppercase_ascii c =
+      if (c >= 'a' && c <= 'z')
+      then unsafe_chr (code c - 32)
+      else c
+
+    let isspace c =
+      c = ' '
+      (* || c = '\f' *) || c = '\n' || c = '\r' || c = '\t' (* || c = '\v' *)
+
+    let isdigit = function
+      | '0'..'9' -> true
+      | _ -> false
+
+    let isxdigit = function
+      | '0'..'9' -> true
+      | 'a'..'f' -> true
+      | 'A'..'F' -> true
+      | _ -> false
+
+    let isalpha = function
+      | 'a'..'z' -> true
+      | 'A'..'Z' -> true
+      | _ -> false
+
+    let isalnum = function
+      | '0'..'9' -> true
+      | 'a'..'z' -> true
+      | 'A'..'Z' -> true
+      | _ -> false
+
+    let hexdigit = function
+      | '0' -> 0
+      | '1' -> 1
+      | '2' -> 2
+      | '3' -> 3
+      | '4' -> 4
+      | '5' -> 5
+      | '6' -> 6
+      | '7' -> 7
+      | '8' -> 8
+      | '9' -> 9
+      | 'a' | 'A' -> 10
+      | 'b' | 'B' -> 11
+      | 'c' | 'C' -> 12
+      | 'd' | 'D' -> 13
+      | 'e' | 'E' -> 14
+      | 'f' | 'F' -> 15
+      | _ -> -1
+end
+
+module String = struct
+    include String
+
+    let map f s =
+      let len = String.length s in
+      let b = Bytes.create len in
+      for i = 0 to len-1 do
+        Bytes.unsafe_set b i (f (unsafe_get s i))
+      done;
+      Bytes.to_string b
+
+    let lowercase_ascii s = map Char.lowercase_ascii s
+    let uppercase_ascii s = map Char.uppercase_ascii s
+
+    let capitalize_ascii s =
+      let b = Bytes.of_string s in
+      Bytes.unsafe_set b 0 (Char.uppercase_ascii (Bytes.unsafe_get b 0));
+      Bytes.to_string b
+
+    let is_prefix str prefix =
+      let n = length prefix in
+      length str >= n && sub str 0 n = prefix
+
+    let is_suffix str suffix =
+      let sufflen = length suffix
+      and len = length str in
+      len >= sufflen && sub str (len - sufflen) sufflen = suffix
+
+    let rec find s sub =
+      let len = length s in
+      let sublen = length sub in
+      let rec loop i =
+        if i <= len-sublen then (
+          let rec loop2 j =
+            if j < sublen then (
+              if s.[i+j] = sub.[j] then loop2 (j+1)
+              else -1
+            ) else
+              i (* found *)
+          in
+          let r = loop2 0 in
+          if r = -1 then loop (i+1) else r
+        ) else
+          -1 (* not found *)
+      in
+      loop 0
+
+    let rec replace s s1 s2 =
+      let len = length s in
+      let sublen = length s1 in
+      let i = find s s1 in
+      if i = -1 then s
+      else (
+        let s' = sub s 0 i in
+        let s'' = sub s (i+sublen) (len-i-sublen) in
+        s' ^ s2 ^ replace s'' s1 s2
+      )
+
+    let replace_char s c1 c2 =
+      let b2 = Bytes.of_string s in
+      let r = ref false in
+      for i = 0 to Bytes.length b2 - 1 do
+        if Bytes.unsafe_get b2 i = c1 then (
+          Bytes.unsafe_set b2 i c2;
+          r := true
+        )
+      done;
+      if not !r then s else Bytes.to_string b2
+
+    let rec nsplit sep str =
+      let len = length str in
+      let seplen = length sep in
+      let i = find str sep in
+      if i = -1 then [str]
+      else (
+        let s' = sub str 0 i in
+        let s'' = sub str (i+seplen) (len-i-seplen) in
+        s' :: nsplit sep s''
+      )
+
+    let split sep str =
+      let len = length sep in
+      let seplen = length str in
+      let i = find str sep in
+      if i = -1 then str, ""
+      else (
+        sub str 0 i, sub str (i + len) (seplen - i - len)
+      )
+
+    let rec lines_split str =
+      let buf = Buffer.create 16 in
+      let len = length str in
+      let rec loop start len =
+        try
+          let i = index_from str start '\n' in
+          if i > 0 && str.[i-1] = '\\' then (
+            Buffer.add_substring buf str start (i-start-1);
+            Buffer.add_char buf '\n';
+            loop (i+1) len
+          ) else (
+            Buffer.add_substring buf str start (i-start);
+            i+1
+          )
+        with Not_found ->
+          if len > 0 && str.[len-1] = '\\' then (
+            Buffer.add_substring buf str start (len-start-1);
+            Buffer.add_char buf '\n'
+          ) else
+            Buffer.add_substring buf str start (len-start);
+          len+1
+      in
+      let endi = loop 0 len in
+      let line = Buffer.contents buf in
+      if endi > len then
+        [line]
+      else
+        line :: lines_split (sub str endi (len-endi))
+
+    let random8 =
+      let chars = "abcdefghijklmnopqrstuvwxyz0123456789" in
+      fun () ->
+      concat "" (
+        List.map (
+          fun _ ->
+            let c = Random.int 36 in
+            let c = chars.[c] in
+            make 1 c
+        ) [1;2;3;4;5;6;7;8]
+      )
+
+    let triml ?(test = Char.isspace) str =
+      let i = ref 0 in
+      let n = ref (String.length str) in
+      while !n > 0 && test str.[!i]; do
+        decr n;
+        incr i
+      done;
+      if !i = 0 then str
+      else String.sub str !i !n
+
+    let trimr ?(test = Char.isspace) str =
+      let n = ref (String.length str) in
+      while !n > 0 && test str.[!n-1]; do
+        decr n
+      done;
+      if !n = String.length str then str
+      else String.sub str 0 !n
+
+    let trim ?(test = Char.isspace) str =
+      trimr ~test (triml ~test str)
+
+    let count_chars c str =
+      let count = ref 0 in
+      for i = 0 to String.length str - 1 do
+        if c = String.unsafe_get str i then incr count
+      done;
+      !count
+
+    let explode str =
+      let r = ref [] in
+      for i = 0 to String.length str - 1 do
+        let c = String.unsafe_get str i in
+        r := c :: !r;
+      done;
+      List.rev !r
+
+    let map_chars f str =
+      List.map f (explode str)
+
+    let spaces n = String.make n ' '
+end
+
+let (//) = Filename.concat
+let quote = Filename.quote
+
+let subdirectory parent path =
+  if path = parent then
+    ""
+  else if String.is_prefix path (parent // "") then (
+    let len = String.length parent in
+    String.sub path (len+1) (String.length path - len-1)
+  ) else
+    invalid_arg (sprintf "%S is not a path prefix of %S" parent path)
+
+let ( +^ ) = Int64.add
+let ( -^ ) = Int64.sub
+let ( *^ ) = Int64.mul
+let ( /^ ) = Int64.div
+let ( &^ ) = Int64.logand
+let ( ~^ ) = Int64.lognot
+
+external identity : 'a -> 'a = "%identity"
+
+let roundup64 i a = let a = a -^ 1L in (i +^ a) &^ (~^ a)
+let div_roundup64 i a = (i +^ a -^ 1L) /^ a
+
+let int_of_le32 str =
+  assert (String.length str = 4);
+  let c0 = Char.code (String.unsafe_get str 0) in
+  let c1 = Char.code (String.unsafe_get str 1) in
+  let c2 = Char.code (String.unsafe_get str 2) in
+  let c3 = Char.code (String.unsafe_get str 3) in
+  Int64.of_int c0 +^
+    (Int64.shift_left (Int64.of_int c1) 8) +^
+    (Int64.shift_left (Int64.of_int c2) 16) +^
+    (Int64.shift_left (Int64.of_int c3) 24)
+
+let le32_of_int i =
+  let c0 = i &^ 0xffL in
+  let c1 = Int64.shift_right (i &^ 0xff00L) 8 in
+  let c2 = Int64.shift_right (i &^ 0xff0000L) 16 in
+  let c3 = Int64.shift_right (i &^ 0xff000000L) 24 in
+  let b = Bytes.create 4 in
+  Bytes.unsafe_set b 0 (Char.unsafe_chr (Int64.to_int c0));
+  Bytes.unsafe_set b 1 (Char.unsafe_chr (Int64.to_int c1));
+  Bytes.unsafe_set b 2 (Char.unsafe_chr (Int64.to_int c2));
+  Bytes.unsafe_set b 3 (Char.unsafe_chr (Int64.to_int c3));
+  Bytes.to_string b
+
+type wrap_break_t = WrapEOS | WrapSpace | WrapNL
+
+let rec wrap ?(chan = stdout) ?(indent = 0) str =
+  let len = String.length str in
+  _wrap chan indent 0 0 len str
+
+and _wrap chan indent column i len str =
+  if i < len then (
+    let (j, break) = _wrap_find_next_break i len str in
+    let next_column =
+      if column + (j-i) >= 76 then (
+        output_char chan '\n';
+        output_spaces chan indent;
+        indent + (j-i) + 1
+      )
+      else column + (j-i) + 1 in
+    output chan (Bytes.of_string str) i (j-i);
+    match break with
+    | WrapEOS -> ()
+    | WrapSpace ->
+      output_char chan ' ';
+      _wrap chan indent next_column (j+1) len str
+    | WrapNL ->
+      output_char chan '\n';
+      output_spaces chan indent;
+      _wrap chan indent indent (j+1) len str
+  )
+
+and _wrap_find_next_break i len str =
+  if i >= len then (len, WrapEOS)
+  else if String.unsafe_get str i = ' ' then (i, WrapSpace)
+  else if String.unsafe_get str i = '\n' then (i, WrapNL)
+  else _wrap_find_next_break (i+1) len str
+
+and output_spaces chan n = for i = 0 to n-1 do output_char chan ' ' done
+
+let (|>) x f = f x
+
+(* Drop elements from a list while a predicate is true. *)
+let rec dropwhile f = function
+  | [] -> []
+  | x :: xs when f x -> dropwhile f xs
+  | xs -> xs
+
+(* Take elements from a list while a predicate is true. *)
+let rec takewhile f = function
+  | x :: xs when f x -> x :: takewhile f xs
+  | _ -> []
+
+let rec filter_map f = function
+  | [] -> []
+  | x :: xs ->
+      match f x with
+      | Some y -> y :: filter_map f xs
+      | None -> filter_map f xs
+
+let rec find_map f = function
+  | [] -> raise Not_found
+  | x :: xs ->
+      match f x with
+      | Some y -> y
+      | None -> find_map f xs
+
+let iteri f xs =
+  let rec loop i = function
+    | [] -> ()
+    | x :: xs -> f i x; loop (i+1) xs
+  in
+  loop 0 xs
+
+let rec mapi i f =
+  function
+  | [] -> []
+  | a::l ->
+    let r = f i a in
+    r :: mapi (i + 1) f l
+let mapi f l = mapi 0 f l
+
+let rec combine3 xs ys zs =
+  match xs, ys, zs with
+  | [], [], [] -> []
+  | x::xs, y::ys, z::zs -> (x, y, z) :: combine3 xs ys zs
+  | _ -> invalid_arg "combine3"
+
+let rec assoc ?(cmp = compare) ~default x = function
+  | [] -> default
+  | (y, y') :: _ when cmp x y = 0 -> y'
+  | _ :: ys -> assoc ~cmp ~default x ys
+
+let uniq ?(cmp = Pervasives.compare) xs =
+  let rec loop acc = function
+    | [] -> acc
+    | [x] -> x :: acc
+    | x :: (y :: _ as xs) when cmp x y = 0 ->
+       loop acc xs
+    | x :: (y :: _ as xs) ->
+       loop (x :: acc) xs
+  in
+  List.rev (loop [] xs)
+
+let sort_uniq ?(cmp = Pervasives.compare) xs =
+  let xs = List.sort cmp xs in
+  let xs = uniq ~cmp xs in
+  xs
+
+let remove_duplicates xs =
+  let h = Hashtbl.create (List.length xs) in
+  let rec loop = function
+    | [] -> []
+    | x :: xs when Hashtbl.mem h x -> xs
+    | x :: xs -> Hashtbl.add h x true; x :: loop xs
+  in
+  loop xs
+
+let push_back xsp x = xsp := !xsp @ [x]
+let push_front x xsp = xsp := x :: !xsp
+let pop_back xsp =
+  let x, xs =
+    match List.rev !xsp with
+    | x :: xs -> x, xs
+    | [] -> failwith "pop" in
+  xsp := List.rev xs;
+  x
+let pop_front xsp =
+  let x, xs =
+    match !xsp with
+    | x :: xs -> x, xs
+    | [] -> failwith "shift" in
+  xsp := xs;
+  x
+
+let append xsp xs = xsp := !xsp @ xs
+let prepend xs xsp = xsp := xs @ !xsp
+
+let unique = let i = ref 0 in fun () -> incr i; !i
+
+let may f = function
+  | None -> ()
+  | Some x -> f x
+
+type ('a, 'b) maybe = Either of 'a | Or of 'b
+
+let protect ~f ~finally =
+  let r =
+    try Either (f ())
+    with exn -> Or exn in
+  finally ();
+  match r with Either ret -> ret | Or exn -> raise exn
+
+let failwithf fs = ksprintf failwith fs
+
+exception Executable_not_found of string (* executable *)
+
+let which executable =
+  let paths =
+    try String.nsplit ":" (Sys.getenv "PATH")
+    with Not_found -> [] in
+  let paths = filter_map (
+    fun p ->
+      let path = p // executable in
+      try Unix.access path [Unix.X_OK]; Some path
+      with Unix.Unix_error _ -> None
+  ) paths in
+  match paths with
+  | [] -> raise (Executable_not_found executable)
+  | x :: _ -> x
+
+(* Program name. *)
+let prog = Filename.basename Sys.executable_name
+
+(* Stores the colours (--colours), quiet (--quiet), trace (-x) and
+ * verbose (-v) flags in a global variable.
+ *)
+let colours = ref false
+let set_colours () = colours := true
+let colours () = !colours
+
+let quiet = ref false
+let set_quiet () = quiet := true
+let quiet () = !quiet
+
+let trace = ref false
+let set_trace () = trace := true
+let trace () = !trace
+
+let verbose = ref false
+let set_verbose () = verbose := true
+let verbose () = !verbose
+
+let read_whole_file path =
+  let buf = Buffer.create 16384 in
+  let chan = open_in path in
+  let maxlen = 16384 in
+  let b = Bytes.create maxlen in
+  let rec loop () =
+    let r = input chan b 0 maxlen in
+    if r > 0 then (
+      Buffer.add_substring buf (Bytes.to_string b) 0 r;
+      loop ()
+    )
+  in
+  loop ();
+  close_in chan;
+  Buffer.contents buf
+
+(* Compare two version strings intelligently. *)
+let rex_numbers = Str.regexp "^\\([0-9]+\\)\\(.*\\)$"
+let rex_letters = Str.regexp_case_fold "^\\([a-z]+\\)\\(.*\\)$"
+
+let compare_version v1 v2 =
+  let rec split_version = function
+    | "" -> []
+    | str ->
+      let first, rest =
+        if Str.string_match rex_numbers str 0 then (
+          let n = Str.matched_group 1 str in
+          let rest = Str.matched_group 2 str in
+          let n =
+            try `Number (int_of_string n)
+            with Failure _ -> `String n in
+          n, rest
+        )
+        else if Str.string_match rex_letters str 0 then
+          `String (Str.matched_group 1 str), Str.matched_group 2 str
+        else (
+          let len = String.length str in
+          `Char str.[0], String.sub str 1 (len-1)
+        ) in
+      first :: split_version rest
+  in
+  compare (split_version v1) (split_version v2)
+
+(* Annoying LVM2 returns a differing UUID strings for different
+ * function calls (sometimes containing or not containing '-'
+ * characters), so we have to normalize each string before
+ * comparison.  c.f. 'compare_pvuuids' in virt-filesystem.
+ *)
+let compare_lvm2_uuids uuid1 uuid2 =
+  let n1 = String.length uuid1 and n2 = String.length uuid2 in
+  let rec loop i1 i2 =
+    if i1 = n1 && i2 = n2 then 0            (* matching *)
+    else if i1 >= n1 then 1                 (* different lengths *)
+    else if i2 >= n2 then -1
+    else if uuid1.[i1] = '-' then loop (i1+1) i2 (* ignore '-' characters *)
+    else if uuid2.[i2] = '-' then loop i1 (i2+1)
+    else (
+      let c = compare uuid1.[i1] uuid2.[i2] in
+      if c <> 0 then c                          (* not matching *)
+      else loop (i1+1) (i2+1)
+    )
+  in
+  loop 0 0
+
+let stringify_args args =
+  let rec quote_args = function
+    | [] -> ""
+    | x :: xs -> " " ^ Filename.quote x ^ quote_args xs
+  in
+  match args with
+  | [] -> ""
+  | app :: xs -> app ^ quote_args xs
+
+(* Unlink a temporary file on exit. *)
+let unlink_on_exit =
+  let files = ref [] in
+  let registered_handlers = ref false in
+
+  let rec unlink_files () =
+    List.iter (
+      fun file -> try Unix.unlink file with _ -> ()
+    ) !files
+  and register_handlers () =
+    (* Unlink on exit. *)
+    at_exit unlink_files
+  in
+
+  fun file ->
+    files := file :: !files;
+    if not !registered_handlers then (
+      register_handlers ();
+      registered_handlers := true
+    )
+
+let is_block_device file =
+  try (Unix.stat file).Unix.st_kind = Unix.S_BLK
+  with Unix.Unix_error _ -> false
+
+let is_char_device file =
+  try (Unix.stat file).Unix.st_kind = Unix.S_CHR
+  with Unix.Unix_error _ -> false
+
+(* Annoyingly Sys.is_directory throws an exception on failure
+ * (RHBZ#1022431).
+ *)
+let is_directory path =
+  try Sys.is_directory path
+  with Sys_error _ -> false
+
+let absolute_path path =
+  if not (Filename.is_relative path) then path
+  else Sys.getcwd () // path
+
+let qemu_input_filename filename =
+  (* If the filename is something like "file:foo" then qemu-img will
+   * try to interpret that as "foo" in the file:/// protocol.  To
+   * avoid that, if the path is relative prefix it with "./" since
+   * qemu-img won't try to interpret such a path.
+   *)
+  if String.length filename > 0 && filename.[0] <> '/' then
+    "./" ^ filename
+  else
+    filename
+
+let rec mkdir_p path permissions =
+  try Unix.mkdir path permissions
+  with
+  | Unix.Unix_error (Unix.EEXIST, _, _) -> ()
+  | Unix.Unix_error (Unix.ENOENT, _, _) ->
+    (* A component in the path does not exist, so first try
+     * creating the parent directory, and then again the requested
+     * directory. *)
+    mkdir_p (Filename.dirname path) permissions;
+    Unix.mkdir path permissions
+
+let normalize_arch = function
+  | "i486" | "i586" | "i686" -> "i386"
+  | "amd64" -> "x86_64"
+  | "powerpc" -> "ppc"
+  | "powerpc64" -> "ppc64"
+  | "powerpc64le" -> "ppc64le"
+  | arch -> arch
+
+(* Are guest arch and host_cpu compatible, in terms of being able
+ * to run commands in the libguestfs appliance?
+ *)
+let guest_arch_compatible guest_arch =
+  let own = normalize_arch Guestfs_config.host_cpu in
+  let guest_arch = normalize_arch guest_arch in
+  match own, guest_arch with
+  | x, y when x = y -> true
+  | "x86_64", "i386" -> true
+  | _ -> false
+
+(* Is the guest OS "Unix-like"? *)
+let unix_like = function
+  | "hurd"
+  | "linux"
+  | "minix" -> true
+  | typ when String.is_suffix typ "bsd" -> true
+  | _ -> false
+
+(** Return the last part of a string, after the specified separator. *)
+let last_part_of str sep =
+  try
+    let i = String.rindex str sep in
+    Some (String.sub str (i+1) (String.length str - (i+1)))
+  with Not_found -> None
+
+let read_first_line_from_file filename =
+  let chan = open_in filename in
+  let line = try input_line chan with End_of_file -> "" in
+  close_in chan;
+  line
+
+let is_regular_file path = (* NB: follows symlinks. *)
+  try (Unix.stat path).Unix.st_kind = Unix.S_REG
+  with Unix.Unix_error _ -> false
diff --git a/common/mlstdutils/std_utils.mli b/common/mlstdutils/std_utils.mli
new file mode 100644
index 000000000..c0f1da30c
--- /dev/null
+++ b/common/mlstdutils/std_utils.mli
@@ -0,0 +1,338 @@
+(* Common utilities for OCaml tools in libguestfs.
+ * Copyright (C) 2010-2017 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+module Char : sig
+    type t = char
+    val chr : int -> char
+    val code : char -> int
+    val compare: t -> t -> int
+    val escaped : char -> string
+    val unsafe_chr : int -> char
+
+    val lowercase_ascii : char -> char
+    val uppercase_ascii : char -> char
+
+    val isspace : char -> bool
+    (** Return true if char is a whitespace character. *)
+    val isdigit : char -> bool
+    (** Return true if the character is a digit [[0-9]]. *)
+    val isxdigit : char -> bool
+    (** Return true if the character is a hex digit [[0-9a-fA-F]]. *)
+    val isalpha : char -> bool
+    (** Return true if the character is a US ASCII 7 bit alphabetic. *)
+    val isalnum : char -> bool
+    (** Return true if the character is a US ASCII 7 bit alphanumeric. *)
+
+    val hexdigit : char -> int
+    (** Return the value of a hex digit.  If the char is not in
+        the set [[0-9a-fA-F]] then this returns [-1]. *)
+end
+(** Override the Char module from stdlib. *)
+
+module String : sig
+    type t = string
+    val compare: t -> t -> int
+    val concat : string -> string list -> string
+    val contains : string -> char -> bool
+    val contains_from : string -> int -> char -> bool
+    val copy : string -> string
+    val escaped : string -> string
+    val get : string -> int -> char
+    val index : string -> char -> int
+    val index_from : string -> int -> char -> int
+    val iter : (char -> unit) -> string -> unit
+    val length : string -> int
+    val make : int -> char -> string
+    val rcontains_from : string -> int -> char -> bool
+    val rindex : string -> char -> int
+    val rindex_from : string -> int -> char -> int
+    val sub : string -> int -> int -> string
+    val unsafe_get : string -> int -> char
+
+    val map : (char -> char) -> string -> string
+
+    val lowercase_ascii : string -> string
+    val uppercase_ascii : string -> string
+    val capitalize_ascii : string -> string
+
+    val is_prefix : string -> string -> bool
+    (** [is_prefix str prefix] returns true if [prefix] is a prefix of [str]. *)
+    val is_suffix : string -> string -> bool
+    (** [is_suffix str suffix] returns true if [suffix] is a suffix of [str]. *)
+    val find : string -> string -> int
+    (** [find str sub] searches for [sub] as a substring of [str].  If
+        found it returns the index.  If not found, it returns [-1]. *)
+    val replace : string -> string -> string -> string
+    (** [replace str s1 s2] replaces all instances of [s1] appearing in
+        [str] with [s2]. *)
+    val replace_char : string -> char -> char -> string
+    (** Replace character in string. *)
+    val nsplit : string -> string -> string list
+    (** [nsplit sep str] splits [str] into multiple strings at each
+        separator [sep]. *)
+    val split : string -> string -> string * string
+    (** [split sep str] splits [str] at the first occurrence of the
+        separator [sep], returning the part before and the part after.
+        If separator is not found, return the whole string and an
+        empty string. *)
+    val lines_split : string -> string list
+    (** [lines_split str] splits [str] into lines, keeping continuation
+        characters (i.e. [\] at the end of lines) into account. *)
+    val random8 : unit -> string
+    (** Return a string of 8 random printable characters. *)
+    val triml : ?test:(char -> bool) -> string -> string
+    (** Trim left. *)
+    val trimr : ?test:(char -> bool) -> string -> string
+    (** Trim right. *)
+    val trim : ?test:(char -> bool) -> string -> string
+    (** Trim left and right. *)
+    val count_chars : char -> string -> int
+    (** Count number of times the character occurs in string. *)
+    val explode : string -> char list
+    (** Explode a string into a list of characters. *)
+    val map_chars : (char -> 'a) -> string -> 'a list
+    (** Explode string, then map function over the characters. *)
+    val spaces : int -> string
+    (** [spaces n] creates a string of n spaces. *)
+end
+(** Override the String module from stdlib. *)
+
+val ( // ) : string -> string -> string
+(** Concatenate directory and filename. *)
+
+val quote : string -> string
+(** Shell-safe quoting of a string (alias for {!Filename.quote}). *)
+
+val subdirectory : string -> string -> string
+(** [subdirectory parent path] returns subdirectory part of [path] relative
+    to the [parent]. If [path] and [parent] point to the same directory empty
+    string is returned.
+
+    Note: path normalization on arguments is {b not} performed!
+
+    If [parent] is not a path prefix of [path] the function raises
+    [Invalid_argument]. *)
+
+val ( +^ ) : int64 -> int64 -> int64
+val ( -^ ) : int64 -> int64 -> int64
+val ( *^ ) : int64 -> int64 -> int64
+val ( /^ ) : int64 -> int64 -> int64
+val ( &^ ) : int64 -> int64 -> int64
+val ( ~^ ) : int64 -> int64
+(** Various int64 operators. *)
+
+external identity : 'a -> 'a = "%identity"
+
+val roundup64 : int64 -> int64 -> int64
+(** [roundup64 i a] returns [i] rounded up to the next multiple of [a]. *)
+val div_roundup64 : int64 -> int64 -> int64
+(** [div_roundup64 i a] returns [i] rounded up to the next multiple of [a],
+    with the result divided by [a]. *)
+val int_of_le32 : string -> int64
+(** Unpack a 4 byte string as a little endian 32 bit integer. *)
+val le32_of_int : int64 -> string
+(** Pack a 32 bit integer a 4 byte string stored little endian. *)
+
+val wrap : ?chan:out_channel -> ?indent:int -> string -> unit
+(** Wrap text. *)
+
+val output_spaces : out_channel -> int -> unit
+(** Write [n] spaces to [out_channel]. *)
+
+val (|>) : 'a -> ('a -> 'b) -> 'b
+(** Added in OCaml 4.01, we can remove our definition when we
+    can assume this minimum version of OCaml. *)
+
+val dropwhile : ('a -> bool) -> 'a list -> 'a list
+(** [dropwhile f xs] drops leading elements from [xs] until
+    [f] returns false. *)
+val takewhile : ('a -> bool) -> 'a list -> 'a list
+(** [takewhile f xs] takes leading elements from [xs] until
+    [f] returns false.
+
+    For any list [xs] and function [f],
+    [xs = takewhile f xs @ dropwhile f xs] *)
+val filter_map : ('a -> 'b option) -> 'a list -> 'b list
+(** [filter_map f xs] applies [f] to each element of [xs].  If
+    [f x] returns [Some y] then [y] is added to the returned list. *)
+val find_map : ('a -> 'b option) -> 'a list -> 'b
+(** [find_map f xs] applies [f] to each element of [xs] until
+    [f x] returns [Some y].  It returns [y].  If we exhaust the
+    list then this raises [Not_found]. *)
+val iteri : (int -> 'a -> 'b) -> 'a list -> unit
+(** [iteri f xs] calls [f i x] for each element, with [i] counting from [0]. *)
+val mapi : (int -> 'a -> 'b) -> 'a list -> 'b list
+(** [mapi f xs] calls [f i x] for each element, with [i] counting from [0],
+    forming the return values from [f] into another list. *)
+
+val combine3 : 'a list -> 'b list -> 'c list -> ('a * 'b * 'c) list
+(** Like {!List.combine} but for triples.  All lists must be the same length. *)
+
+val assoc : ?cmp:('a -> 'a -> int) -> default:'b -> 'a -> ('a * 'b) list -> 'b
+(** Like {!List.assoc} but with a user-defined comparison function, and
+    instead of raising [Not_found], it returns the [~default] value. *)
+
+val uniq : ?cmp:('a -> 'a -> int) -> 'a list -> 'a list
+(** Uniquify a list (the list must be sorted first). *)
+
+val sort_uniq : ?cmp:('a -> 'a -> int) -> 'a list -> 'a list
+(** Sort and uniquify a list. *)
+
+val remove_duplicates : 'a list -> 'a list
+(** Remove duplicates from an unsorted list; useful when the order
+    of the elements matter.
+
+    Please use [sort_uniq] when the order does not matter. *)
+
+val push_back : 'a list ref -> 'a -> unit
+val push_front : 'a -> 'a list ref -> unit
+val pop_back : 'a list ref -> 'a
+val pop_front : 'a list ref -> 'a
+(** Imperative list manipulation functions, similar to C++ STL
+    functions with the same names.  (Although the names are similar,
+    the computational complexity of the functions is quite different.)
+
+    These operate on list references, and each function modifies the
+    list reference that is passed to it.
+
+    [push_back xsp x] appends the element [x] to the end of the list
+    [xsp].  This function is not tail-recursive.
+
+    [push_front x xsp] prepends the element [x] to the head of the
+    list [xsp].  (The arguments are reversed compared to the same Perl
+    function, but OCaml is type safe so that's OK.)
+
+    [pop_back xsp] removes the last element of the list [xsp] and
+    returns it.  The list is modified to become the list minus the
+    final element.  If a zero-length list is passed in, this raises
+    [Failure "pop_back"].  This function is not tail-recursive.
+
+    [pop_front xsp] removes the head element of the list [xsp] and
+    returns it.  The list is modified to become the tail of the list.
+    If a zero-length list is passed in, this raises [Failure
+    "pop_front"]. *)
+
+val append : 'a list ref -> 'a list -> unit
+val prepend : 'a list -> 'a list ref -> unit
+(** More imperative list manipulation functions.
+
+    [append] is like {!push_back} above, except it appends a list to
+    the list reference.  This function is not tail-recursive.
+
+    [prepend] is like {!push_front} above, except it prepends a list
+    to the list reference. *)
+
+val unique : unit -> int
+(** Returns a unique number each time called. *)
+
+val may : ('a -> unit) -> 'a option -> unit
+(** [may f (Some x)] runs [f x].  [may f None] does nothing. *)
+
+type ('a, 'b) maybe = Either of 'a | Or of 'b
+(** Like the Haskell [Either] type. *)
+
+val protect : f:(unit -> 'a) -> finally:(unit -> unit) -> 'a
+(** Execute [~f] and afterwards execute [~finally].
+
+    If [~f] throws an exception then [~finally] is run and the
+    original exception from [~f] is re-raised.
+
+    If [~finally] throws an exception, then the original exception
+    is lost. (NB: Janestreet core {!Exn.protectx}, on which this
+    function is modelled, doesn't throw away the exception in this
+    case, but requires a lot more work by the caller.  Perhaps we
+    will change this in future.) *)
+
+val failwithf : ('a, unit, string, 'b) format4 -> 'a
+(** Like [failwith] but supports printf-like arguments. *)
+
+exception Executable_not_found of string (* executable *)
+(** Exception thrown by [which] when the specified executable is not found
+    in [$PATH]. *)
+
+val which : string -> string
+(** Return the full path of the specified executable from [$PATH].
+
+    Throw [Executable_not_found] if not available. *)
+
+val prog : string
+(** The program name (derived from {!Sys.executable_name}). *)
+
+val set_colours : unit -> unit
+val colours : unit -> bool
+val set_quiet : unit -> unit
+val quiet : unit -> bool
+val set_trace : unit -> unit
+val trace : unit -> bool
+val set_verbose : unit -> unit
+val verbose : unit -> bool
+(** Stores the colours ([--colours]), quiet ([--quiet]), trace ([-x])
+    and verbose ([-v]) flags in global variables. *)
+
+val read_whole_file : string -> string
+(** Read in the whole file as a string. *)
+
+val compare_version : string -> string -> int
+(** Compare two version strings. *)
+
+val compare_lvm2_uuids : string -> string -> int
+(** Compare two LVM2 UUIDs, ignoring '-' characters. *)
+
+val stringify_args : string list -> string
+(** Create a "pretty-print" representation of a program invocation
+    (i.e. executable and its arguments). *)
+
+val unlink_on_exit : string -> unit
+(** Unlink a temporary file on exit. *)
+
+val is_block_device : string -> bool
+val is_char_device : string -> bool
+val is_directory : string -> bool
+(** These don't throw exceptions, unlike the [Sys] functions. *)
+
+val absolute_path : string -> string
+(** Convert any path to an absolute path. *)
+
+val qemu_input_filename : string -> string
+(** Sanitizes a filename for passing it safely to qemu/qemu-img. *)
+
+val mkdir_p : string -> int -> unit
+(** Creates a directory, and its parents if missing. *)
+
+val normalize_arch : string -> string
+(** Normalize the architecture name, i.e. maps it into a defined
+    identifier for it -- e.g. i386, i486, i586, and i686 are
+    normalized as i386. *)
+
+val guest_arch_compatible : string -> bool
+(** Are guest arch and host_cpu compatible, in terms of being able
+    to run commands in the libguestfs appliance? *)
+
+val unix_like : string -> bool
+(** Is the guest OS "Unix-like"?  Call this with the result of
+    {!Guestfs.inspect_get_type}. *)
+
+val last_part_of : string -> char -> string option
+(** Return the last part of a string, after the specified separator. *)
+
+val read_first_line_from_file : string -> string
+(** Read only the first line (i.e. until the first newline character)
+    of a file.  If the file is empty this returns an empty string. *)
+
+val is_regular_file : string -> bool
+(** Checks whether the file is a regular file. *)
diff --git a/common/mlstdutils/std_utils_tests.ml b/common/mlstdutils/std_utils_tests.ml
new file mode 100644
index 000000000..1003f931c
--- /dev/null
+++ b/common/mlstdutils/std_utils_tests.ml
@@ -0,0 +1,95 @@
+(* Utilities for OCaml tools in libguestfs.
+ * Copyright (C) 2011-2017 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+(* This file tests the Std_utils module. *)
+
+open OUnit2
+open Std_utils
+
+(* Utils. *)
+let assert_equal_string = assert_equal ~printer:(fun x -> x)
+let assert_equal_int = assert_equal ~printer:(fun x -> string_of_int x)
+let assert_equal_int64 = assert_equal ~printer:(fun x -> Int64.to_string x)
+let assert_equal_stringlist = assert_equal ~printer:(fun x -> "(" ^ (String.escaped (String.concat "," x)) ^ ")")
+
+let test_subdirectory ctx =
+  assert_equal_string "" (subdirectory "/foo" "/foo");
+  assert_equal_string "" (subdirectory "/foo" "/foo/");
+  assert_equal_string "bar" (subdirectory "/foo" "/foo/bar");
+  assert_equal_string "bar/baz" (subdirectory "/foo" "/foo/bar/baz")
+
+(* Test Common_utils.int_of_le32 and Common_utils.le32_of_int. *)
+let test_le32 ctx =
+  assert_equal_int64 0x20406080L (int_of_le32 "\x80\x60\x40\x20");
+  assert_equal_string "\x80\x60\x40\x20" (le32_of_int 0x20406080L)
+
+(* Test Std_utils.String.is_prefix. *)
+let test_string_is_prefix ctx =
+  assert_bool "String.is_prefix,," (String.is_prefix "" "");
+  assert_bool "String.is_prefix,foo," (String.is_prefix "foo" "");
+  assert_bool "String.is_prefix,foo,foo" (String.is_prefix "foo" "foo");
+  assert_bool "String.is_prefix,foo123,foo" (String.is_prefix "foo123" "foo");
+  assert_bool "not (String.is_prefix,,foo" (not (String.is_prefix "" "foo"))
+
+(* Test Std_utils.String.is_suffix. *)
+let test_string_is_suffix ctx =
+  assert_bool "String.is_suffix,," (String.is_suffix "" "");
+  assert_bool "String.is_suffix,foo," (String.is_suffix "foo" "");
+  assert_bool "String.is_suffix,foo,foo" (String.is_suffix "foo" "foo");
+  assert_bool "String.is_suffix,123foo,foo" (String.is_suffix "123foo" "foo");
+  assert_bool "not String.is_suffix,,foo" (not (String.is_suffix "" "foo"))
+
+(* Test Std_utils.String.find. *)
+let test_string_find ctx =
+  assert_equal_int 0 (String.find "" "");
+  assert_equal_int 0 (String.find "foo" "");
+  assert_equal_int 1 (String.find "foo" "o");
+  assert_equal_int 3 (String.find "foobar" "bar");
+  assert_equal_int (-1) (String.find "" "baz");
+  assert_equal_int (-1) (String.find "foobar" "baz")
+
+(* Test Std_utils.String.lines_split. *)
+let test_string_lines_split ctx =
+  assert_equal_stringlist [""] (String.lines_split "");
+  assert_equal_stringlist ["A"] (String.lines_split "A");
+  assert_equal_stringlist ["A"; ""] (String.lines_split "A\n");
+  assert_equal_stringlist ["A"; "B"] (String.lines_split "A\nB");
+  assert_equal_stringlist ["A"; "B"; "C"] (String.lines_split "A\nB\nC");
+  assert_equal_stringlist ["A"; "B"; "C"; "D"] (String.lines_split "A\nB\nC\nD");
+  assert_equal_stringlist ["A\n"] (String.lines_split "A\\");
+  assert_equal_stringlist ["A\nB"] (String.lines_split "A\\\nB");
+  assert_equal_stringlist ["A"; "B\nC"] (String.lines_split "A\nB\\\nC");
+  assert_equal_stringlist ["A"; "B\nC"; "D"] (String.lines_split "A\nB\\\nC\nD");
+  assert_equal_stringlist ["A"; "B\nC\nD"] (String.lines_split "A\nB\\\nC\\\nD");
+  assert_equal_stringlist ["A\nB"; ""] (String.lines_split "A\\\nB\n");
+  assert_equal_stringlist ["A\nB\n"] (String.lines_split "A\\\nB\\\n")
+
+(* Suites declaration. *)
+let suite =
+  "mllib Std_utils" >:::
+    [
+      "subdirectory" >:: test_subdirectory;
+      "numeric.le32" >:: test_le32;
+      "strings.is_prefix" >:: test_string_is_prefix;
+      "strings.is_suffix" >:: test_string_is_suffix;
+      "strings.find" >:: test_string_find;
+      "strings.lines_split" >:: test_string_lines_split;
+    ]
+
+let () =
+  run_test_tt_main suite
diff --git a/mllib/stringMap.ml b/common/mlstdutils/stringMap.ml
similarity index 100%
rename from mllib/stringMap.ml
rename to common/mlstdutils/stringMap.ml
diff --git a/mllib/stringMap.mli b/common/mlstdutils/stringMap.mli
similarity index 100%
rename from mllib/stringMap.mli
rename to common/mlstdutils/stringMap.mli
diff --git a/configure.ac b/configure.ac
index 7d0f0a1dd..eba149241 100644
--- a/configure.ac
+++ b/configure.ac
@@ -186,6 +186,8 @@ AC_CONFIG_FILES([Makefile
                  common/edit/Makefile
                  common/miniexpect/Makefile
                  common/mlprogress/Makefile
+                 common/mlstdutils/Makefile
+                 common/mlstdutils/guestfs_config.ml
                  common/mlvisit/Makefile
                  common/mlxml/Makefile
                  common/options/Makefile
@@ -230,7 +232,6 @@ AC_CONFIG_FILES([Makefile
                  lua/examples/Makefile
                  make-fs/Makefile
                  mllib/Makefile
-                 mllib/guestfs_config.ml
                  ocaml/META
                  ocaml/Makefile
                  ocaml/examples/Makefile
diff --git a/customize/Makefile.am b/customize/Makefile.am
index 07398b2e8..674134b70 100644
--- a/customize/Makefile.am
+++ b/customize/Makefile.am
@@ -123,6 +123,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/mllib \
 	-I $(builddir)
 if HAVE_OCAML_PKG_GETTEXT
@@ -149,7 +150,12 @@ else
 CUSTOMIZE_THEOBJECTS = $(CUSTOMIZE_XOBJECTS)
 endif
 
-OCAMLLINKFLAGS = mlguestfs.$(MLARCHIVE) mllib.$(MLARCHIVE) customize.$(MLARCHIVE) $(LINK_CUSTOM_OCAMLC_ONLY)
+OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
+	mlguestfs.$(MLARCHIVE) \
+	mllib.$(MLARCHIVE) \
+	customize.$(MLARCHIVE) \
+	$(LINK_CUSTOM_OCAMLC_ONLY)
 
 OCAMLCLIBS = \
 	-lutils \
diff --git a/customize/SELinux_relabel.ml b/customize/SELinux_relabel.ml
index 11999299b..ab373b33a 100644
--- a/customize/SELinux_relabel.ml
+++ b/customize/SELinux_relabel.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Printf
 
diff --git a/customize/append_line.ml b/customize/append_line.ml
index e967b4201..405080617 100644
--- a/customize/append_line.ml
+++ b/customize/append_line.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/customize/customize_main.ml b/customize/customize_main.ml
index 5b4641237..55ec3cb78 100644
--- a/customize/customize_main.ml
+++ b/customize/customize_main.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Customize_cmdline
diff --git a/customize/customize_run.ml b/customize/customize_run.ml
index f71ae3535..5564684b4 100644
--- a/customize/customize_run.ml
+++ b/customize/customize_run.ml
@@ -19,8 +19,9 @@
 open Unix
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Customize_cmdline
 open Password
diff --git a/customize/firstboot.ml b/customize/firstboot.ml
index 9208daa0a..41aa52dac 100644
--- a/customize/firstboot.ml
+++ b/customize/firstboot.ml
@@ -18,6 +18,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/customize/hostname.ml b/customize/hostname.ml
index 23c149402..b49db8714 100644
--- a/customize/hostname.ml
+++ b/customize/hostname.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 
 open Printf
diff --git a/customize/password.ml b/customize/password.ml
index 4ab5a14d1..d26b94865 100644
--- a/customize/password.ml
+++ b/customize/password.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Printf
 
diff --git a/customize/perl_edit.ml b/customize/perl_edit.ml
index 5cd250b49..bb44ea062 100644
--- a/customize/perl_edit.ml
+++ b/customize/perl_edit.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 
 external c_edit_file : verbose:bool -> Guestfs.t -> int64 -> string -> string -> unit
diff --git a/customize/ssh_key.ml b/customize/ssh_key.ml
index 4302a8e92..185536d1d 100644
--- a/customize/ssh_key.ml
+++ b/customize/ssh_key.ml
@@ -16,13 +16,14 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
-open Common_utils
-
 open Printf
 open Sys
 open Unix
 
+open Std_utils
+open Common_utils
+open Common_gettext.Gettext
+
 module G = Guestfs
 
 type ssh_key_selector =
diff --git a/customize/subscription_manager.ml b/customize/subscription_manager.ml
index a23efe546..56ba28ab9 100644
--- a/customize/subscription_manager.ml
+++ b/customize/subscription_manager.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 type sm_credentials = {
   sm_username : string;
diff --git a/dib/Makefile.am b/dib/Makefile.am
index 6780ee249..b10fa94c9 100644
--- a/dib/Makefile.am
+++ b/dib/Makefile.am
@@ -79,6 +79,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/mllib
 if HAVE_OCAML_PKG_GETTEXT
 OCAMLPACKAGES += -package gettext-stub
@@ -99,10 +100,15 @@ else
 OBJECTS = $(XOBJECTS)
 endif
 
-OCAMLLINKFLAGS = mlguestfs.$(MLARCHIVE) mllib.$(MLARCHIVE) $(LINK_CUSTOM_OCAMLC_ONLY)
+OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
+	mlguestfs.$(MLARCHIVE) \
+	mllib.$(MLARCHIVE) \
+	$(LINK_CUSTOM_OCAMLC_ONLY)
 
 virt_dib_DEPENDENCIES = \
 	$(OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
 virt_dib_LINK = \
@@ -138,7 +144,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mllib $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlstdutils -I $(abs_top_builddir)/mllib $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/dib/cmdline.ml b/dib/cmdline.ml
index 67194704e..549f01546 100644
--- a/dib/cmdline.ml
+++ b/dib/cmdline.ml
@@ -18,8 +18,9 @@
 
 (* Command line argument parsing. *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Utils
diff --git a/dib/dib.ml b/dib/dib.ml
index eca47fa46..d083eed9f 100644
--- a/dib/dib.ml
+++ b/dib/dib.ml
@@ -16,9 +16,10 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Cmdline
 open Utils
diff --git a/dib/elements.ml b/dib/elements.ml
index 4c2875ae1..d237eeb7f 100644
--- a/dib/elements.ml
+++ b/dib/elements.ml
@@ -18,8 +18,9 @@
 
 (* Parsing and handling of elements. *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/dib/output_format.ml b/dib/output_format.ml
index 851cefc43..6499ee259 100644
--- a/dib/output_format.ml
+++ b/dib/output_format.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
diff --git a/dib/output_format_qcow2.ml b/dib/output_format_qcow2.ml
index afb564ce7..a32b2a4f9 100644
--- a/dib/output_format_qcow2.ml
+++ b/dib/output_format_qcow2.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
diff --git a/dib/utils.ml b/dib/utils.ml
index afa2ec944..8b6bb1576 100644
--- a/dib/utils.ml
+++ b/dib/utils.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Printf
 
diff --git a/docs/C_SOURCE_FILES b/docs/C_SOURCE_FILES
index f6ac73047..71c17603f 100644
--- a/docs/C_SOURCE_FILES
+++ b/docs/C_SOURCE_FILES
@@ -16,6 +16,7 @@ common/edit/file-edit.h
 common/miniexpect/miniexpect.c
 common/miniexpect/miniexpect.h
 common/mlprogress/progress-c.c
+common/mlstdutils/dummy.c
 common/mlvisit/dummy.c
 common/mlvisit/visit-c.c
 common/mlxml/xml-c.c
diff --git a/docs/guestfs-hacking.pod b/docs/guestfs-hacking.pod
index 1ff496381..beb44d2dc 100644
--- a/docs/guestfs-hacking.pod
+++ b/docs/guestfs-hacking.pod
@@ -100,6 +100,10 @@ A copy of the miniexpect library from
 L<http://git.annexia.org/?p=miniexpect.git;a=summary>.  This is used
 in virt-p2v.
 
+=item F<common/mlstdutils>
+
+A library of pure OCaml utility functions used in many places.
+
 =item F<common/mlprogress>
 
 OCaml bindings for the progress bar functions (see F<common/progress>).
diff --git a/generator/GObject.ml b/generator/GObject.ml
index bb95b170c..8fa17c219 100644
--- a/generator/GObject.ml
+++ b/generator/GObject.ml
@@ -22,7 +22,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Actions
 open Docstrings
 open Events
diff --git a/generator/Makefile.am b/generator/Makefile.am
index 81b49cab1..401029d34 100644
--- a/generator/Makefile.am
+++ b/generator/Makefile.am
@@ -53,8 +53,6 @@ sources = \
 	c.mli \
 	checks.ml \
 	checks.mli \
-	common_utils.ml \
-	common_utils.mli \
 	csharp.ml \
 	csharp.mli \
 	customize.ml \
@@ -77,7 +75,6 @@ sources = \
 	GObject.mli \
 	golang.ml \
 	golang.mli \
-	guestfs_config.ml \
 	haskell.ml \
 	haskell.mli \
 	java.ml \
@@ -118,8 +115,8 @@ sources = \
 # In build dependency order.
 objects = \
 	$(OCAML_GENERATOR_BYTES_COMPAT_CMO) \
-	guestfs_config.cmo \
-	common_utils.cmo \
+	../common/mlstdutils/guestfs_config.cmo \
+	../common/mlstdutils/std_utils.cmo \
 	types.cmo \
 	utils.cmo \
 	proc_nr.cmo \
@@ -170,7 +167,12 @@ objects = \
 
 EXTRA_DIST = $(sources) files-generated.txt
 
-OCAMLPACKAGES = -package unix,str -I $(srcdir) -I .
+OCAMLPACKAGES = \
+	-package unix,str \
+	-I $(srcdir) \
+	-I . \
+	-I $(top_srcdir)/common/mlstdutils \
+	-I $(top_builddir)/common/mlstdutils
 OCAMLFLAGS = $(OCAML_FLAGS) $(OCAML_WARN_ERROR)
 
 noinst_PROGRAM = generator
@@ -183,9 +185,9 @@ generator: $(objects)
 # Dependencies.
 depend: .depend
 
-.depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml) common_utils.ml common_utils.mli guestfs_config.ml
+.depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml) $(wildcard $(abs_srcdir)/common/mlstdutils/*.mli) $(wildcard $(abs_srcdir)/common/mlstdutils/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) $^ | \
+	$(OCAMLFIND) ocamldep -I ../common/mlstdutils -I $(abs_srcdir) $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
@@ -224,22 +226,6 @@ stamp-generator: generator
 	cd $(top_srcdir) && $(abs_builddir)/generator
 	touch $@
 
-# We share common_utils.ml{,i} with the mllib directory.  However we
-# have to remove functions which depend on any modules which are not
-# part of the OCaml stdlib.
-common_utils.ml: $(top_srcdir)/mllib/common_utils.ml
-	rm -f $@ $ -t
-	echo '(* This file is generated from mllib/common_utils.ml *)' > $ -t
-	sed -n '/^(\*<stdlib>\*)$$/,/^(\*<\/stdlib>\*)$$/p' $< >> $ -t
-	mv $ -t $@
-common_utils.mli: $(top_srcdir)/mllib/common_utils.mli
-	rm -f $@ $ -t
-	echo '(* This file is generated from mllib/common_utils.mli *)' > $ -t
-	sed -n '/^(\*<stdlib>\*)$$/,/^(\*<\/stdlib>\*)$$/p' $< >> $ -t
-	mv $ -t $@
-guestfs_config.ml: ../mllib/guestfs_config.ml
-	cp $< $@
-
 CLEANFILES += $(noinst_DATA) $(noinst_PROGRAM)
 
 DISTCLEANFILES += .pod2text.data.version.2
diff --git a/generator/OCaml.ml b/generator/OCaml.ml
index 955da6f09..f6a4292b9 100644
--- a/generator/OCaml.ml
+++ b/generator/OCaml.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/UEFI.ml b/generator/UEFI.ml
index 95797aad9..5c5e02bab 100644
--- a/generator/UEFI.ml
+++ b/generator/UEFI.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Utils
 open Pr
 open Docstrings
diff --git a/generator/XDR.ml b/generator/XDR.ml
index 2d799929b..4b0a552d1 100644
--- a/generator/XDR.ml
+++ b/generator/XDR.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/actions.ml b/generator/actions.ml
index 2722f3dcd..a9b3b5906 100644
--- a/generator/actions.ml
+++ b/generator/actions.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 
diff --git a/generator/authors.ml b/generator/authors.ml
index d4547bdb1..ca5242983 100644
--- a/generator/authors.ml
+++ b/generator/authors.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Utils
 open Pr
 open Docstrings
diff --git a/generator/bindtests.ml b/generator/bindtests.ml
index c3caebfce..d225146c0 100644
--- a/generator/bindtests.ml
+++ b/generator/bindtests.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/c.ml b/generator/c.ml
index 1f099a221..27bf1ebf9 100644
--- a/generator/c.ml
+++ b/generator/c.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/checks.ml b/generator/checks.ml
index 881069489..be7b272a3 100644
--- a/generator/checks.ml
+++ b/generator/checks.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Actions
diff --git a/generator/csharp.ml b/generator/csharp.ml
index 6a280011a..0eab21f0d 100644
--- a/generator/csharp.ml
+++ b/generator/csharp.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/customize.ml b/generator/customize.ml
index b158eb5d9..381ed0627 100644
--- a/generator/customize.ml
+++ b/generator/customize.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Docstrings
 open Pr
 
@@ -623,6 +623,7 @@ and generate_customize_cmdline_ml () =
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
diff --git a/generator/daemon.ml b/generator/daemon.ml
index 84686973c..0300dc54b 100644
--- a/generator/daemon.ml
+++ b/generator/daemon.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/docstrings.ml b/generator/docstrings.ml
index 2ce595dae..696f1c52a 100644
--- a/generator/docstrings.ml
+++ b/generator/docstrings.ml
@@ -21,7 +21,7 @@
 open Unix
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/erlang.ml b/generator/erlang.ml
index 602380966..03cca3368 100644
--- a/generator/erlang.ml
+++ b/generator/erlang.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/errnostring.ml b/generator/errnostring.ml
index b3d718815..e5f4c69f8 100644
--- a/generator/errnostring.ml
+++ b/generator/errnostring.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/events.ml b/generator/events.ml
index 7188e1203..f3b682a5a 100644
--- a/generator/events.ml
+++ b/generator/events.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Utils
 
 (* NB: DO NOT REORDER THESE, as doing so will change the ABI.  Only
diff --git a/generator/fish.ml b/generator/fish.ml
index 45289132f..3d99c9081 100644
--- a/generator/fish.ml
+++ b/generator/fish.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/golang.ml b/generator/golang.ml
index f32ccf2c1..67f360839 100644
--- a/generator/golang.ml
+++ b/generator/golang.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/haskell.ml b/generator/haskell.ml
index 592d817fa..ec3f311df 100644
--- a/generator/haskell.ml
+++ b/generator/haskell.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/java.ml b/generator/java.ml
index c44e669a0..7c3212a49 100644
--- a/generator/java.ml
+++ b/generator/java.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/lua.ml b/generator/lua.ml
index c4ab4cc47..b40c51753 100644
--- a/generator/lua.ml
+++ b/generator/lua.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/main.ml b/generator/main.ml
index d4316c085..0e1c01f74 100644
--- a/generator/main.ml
+++ b/generator/main.ml
@@ -21,7 +21,7 @@
 open Unix
 open Printf
 
-open Common_utils
+open Std_utils
 open Pr
 open Actions
 open Structs
diff --git a/generator/optgroups.ml b/generator/optgroups.ml
index e9a37e19c..4b9b66f77 100644
--- a/generator/optgroups.ml
+++ b/generator/optgroups.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Actions
diff --git a/generator/perl.ml b/generator/perl.ml
index bf2dc4a81..8e3dad75e 100644
--- a/generator/perl.ml
+++ b/generator/perl.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/php.ml b/generator/php.ml
index 48cd89fdc..0721e431a 100644
--- a/generator/php.ml
+++ b/generator/php.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/pr.ml b/generator/pr.ml
index e8b32b67d..0c56f3e67 100644
--- a/generator/pr.ml
+++ b/generator/pr.ml
@@ -21,7 +21,7 @@
 open Unix
 open Printf
 
-open Common_utils
+open Std_utils
 open Utils
 
 (* Output channel, 'pr' prints to this. *)
diff --git a/generator/python.ml b/generator/python.ml
index 4cae24757..c6c237241 100644
--- a/generator/python.ml
+++ b/generator/python.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/ruby.ml b/generator/ruby.ml
index 4d2ebbf0d..825cab32a 100644
--- a/generator/ruby.ml
+++ b/generator/ruby.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/structs.ml b/generator/structs.ml
index 834fa9c54..57975b564 100644
--- a/generator/structs.ml
+++ b/generator/structs.ml
@@ -18,7 +18,7 @@
 
 (* Please read generator/README first. *)
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 
diff --git a/generator/tests_c_api.ml b/generator/tests_c_api.ml
index f9f14f6dc..a680521f4 100644
--- a/generator/tests_c_api.ml
+++ b/generator/tests_c_api.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 open Types
 open Utils
 open Pr
diff --git a/generator/utils.ml b/generator/utils.ml
index a745a02b7..b818a0b3c 100644
--- a/generator/utils.ml
+++ b/generator/utils.ml
@@ -23,7 +23,7 @@
  * makes this a bit harder than it should be.
  *)
 
-open Common_utils
+open Std_utils
 
 open Unix
 open Printf
diff --git a/get-kernel/Makefile.am b/get-kernel/Makefile.am
index bda3a8db1..c6454d7a4 100644
--- a/get-kernel/Makefile.am
+++ b/get-kernel/Makefile.am
@@ -63,6 +63,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/mllib
 if HAVE_OCAML_PKG_GETTEXT
 OCAMLPACKAGES += -package gettext-stub
@@ -83,10 +84,15 @@ else
 OBJECTS = $(XOBJECTS)
 endif
 
-OCAMLLINKFLAGS = mlguestfs.$(MLARCHIVE) mllib.$(MLARCHIVE) $(LINK_CUSTOM_OCAMLC_ONLY)
+OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
+	mlguestfs.$(MLARCHIVE) \
+	mllib.$(MLARCHIVE) \
+	$(LINK_CUSTOM_OCAMLC_ONLY)
 
 virt_get_kernel_DEPENDENCIES = \
 	$(OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
 virt_get_kernel_LINK = \
@@ -121,7 +127,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mllib $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlstdutils -I $(abs_top_builddir)/mllib $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/get-kernel/get_kernel.ml b/get-kernel/get_kernel.ml
index e45838811..1c9ece44b 100644
--- a/get-kernel/get_kernel.ml
+++ b/get-kernel/get_kernel.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 module G = Guestfs
diff --git a/mllib/Makefile.am b/mllib/Makefile.am
index c84f5f36d..5f6f7fa85 100644
--- a/mllib/Makefile.am
+++ b/mllib/Makefile.am
@@ -19,7 +19,7 @@ include $(top_srcdir)/subdir-rules.mk
 
 EXTRA_DIST = \
 	$(SOURCES_MLI) \
-	$(filter-out guestfs_config.ml libdir.ml,$(SOURCES_ML)) \
+	$(SOURCES_ML) \
 	$(SOURCES_C) \
 	common_utils_tests.ml \
 	getopt_tests.ml \
@@ -36,15 +36,11 @@ SOURCES_MLI = \
 	planner.mli \
 	regedit.mli \
 	registry.mli \
-	stringMap.mli \
 	URI.mli \
 	xpath_helpers.mli
 
 SOURCES_ML = \
-	guestfs_config.ml \
 	$(OCAML_BYTES_COMPAT_ML) \
-	libdir.ml \
-	stringMap.ml \
 	common_gettext.ml \
 	getopt.ml \
 	unix_utils.ml \
@@ -93,7 +89,8 @@ libmllib_a_CPPFLAGS = \
 	-I$(top_srcdir)/common/utils \
 	-I$(top_srcdir)/lib \
 	-I$(top_srcdir)/common/options \
-	-I$(top_srcdir)/common/mlxml
+	-I$(top_srcdir)/common/mlxml \
+	-I$(top_srcdir)/common/mlstdutils
 libmllib_a_CFLAGS = \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS) \
 	$(LIBVIRT_CFLAGS) $(LIBXML2_CFLAGS) \
@@ -112,6 +109,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
 	-I $(top_builddir)/common/mlxml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(builddir)
 OCAMLPACKAGES_TESTS = $(MLLIB_CMA)
 if HAVE_OCAML_PKG_GETTEXT
@@ -144,13 +142,6 @@ $(MLLIB_CMA): $(OBJECTS) libmllib.a
 	$(OCAMLFIND) mklib $(OCAMLPACKAGES) \
 	    $(OBJECTS) $(libmllib_a_OBJECTS) -o mllib
 
-# This OCaml module has to be generated by make (configure will put
-# unexpanded prefix macro in).
-
-libdir.ml: Makefile
-	echo 'let libdir = "$(libdir)"' > $ -t
-	mv $ -t $@
-
 # Tests.
 
 common_utils_tests_SOURCES = dummy.c
@@ -196,10 +187,14 @@ JSON_tests_THEOBJECTS = $(JSON_tests_XOBJECTS)
 JSON_tests.cmx: OCAMLPACKAGES += $(OCAMLPACKAGES_TESTS)
 endif
 
-OCAMLLINKFLAGS = mlguestfs.$(MLARCHIVE) $(LINK_CUSTOM_OCAMLC_ONLY)
+OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
+	mlguestfs.$(MLARCHIVE) \
+	$(LINK_CUSTOM_OCAMLC_ONLY)
 
 common_utils_tests_DEPENDENCIES = \
 	$(common_utils_tests_THEOBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	$(MLLIB_CMA) \
 	$(top_srcdir)/ocaml-link.sh
 common_utils_tests_LINK = \
@@ -210,6 +205,7 @@ common_utils_tests_LINK = \
 
 getopt_tests_DEPENDENCIES = \
 	$(getopt_tests_THEOBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	$(MLLIB_CMA) \
 	$(top_srcdir)/ocaml-link.sh
 getopt_tests_LINK = \
@@ -220,6 +216,7 @@ getopt_tests_LINK = \
 
 JSON_tests_DEPENDENCIES = \
 	$(JSON_tests_THEOBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	$(MLLIB_CMA) \
 	$(top_srcdir)/ocaml-link.sh
 JSON_tests_LINK = \
diff --git a/mllib/checksums.ml b/mllib/checksums.ml
index 61deac2d1..f4c414f57 100644
--- a/mllib/checksums.ml
+++ b/mllib/checksums.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Printf
 
diff --git a/mllib/common_utils.ml b/mllib/common_utils.ml
index 89bbfe397..73c6e2473 100644
--- a/mllib/common_utils.ml
+++ b/mllib/common_utils.ml
@@ -16,14 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-(* The parts between <stdlib>..</stdlib> are copied into the
- * generator/common_utils.ml file.  These parts must ONLY use
- * functions from the OCaml stdlib.
- *)
-(*<stdlib>*)
 open Printf
-(*</stdlib>*)
 
+open Std_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
 
@@ -31,474 +26,6 @@ external c_inspect_decrypt : Guestfs.t -> int64 -> unit = "guestfs_int_mllib_ins
 external c_set_echo_keys : unit -> unit = "guestfs_int_mllib_set_echo_keys" "noalloc"
 external c_set_keys_from_stdin : unit -> unit = "guestfs_int_mllib_set_keys_from_stdin" "noalloc"
 
-(*<stdlib>*)
-
-module Char = struct
-    include Char
-
-    let lowercase_ascii c =
-      if (c >= 'A' && c <= 'Z')
-      then unsafe_chr (code c + 32)
-      else c
-
-    let uppercase_ascii c =
-      if (c >= 'a' && c <= 'z')
-      then unsafe_chr (code c - 32)
-      else c
-
-    let isspace c =
-      c = ' '
-      (* || c = '\f' *) || c = '\n' || c = '\r' || c = '\t' (* || c = '\v' *)
-
-    let isdigit = function
-      | '0'..'9' -> true
-      | _ -> false
-
-    let isxdigit = function
-      | '0'..'9' -> true
-      | 'a'..'f' -> true
-      | 'A'..'F' -> true
-      | _ -> false
-
-    let isalpha = function
-      | 'a'..'z' -> true
-      | 'A'..'Z' -> true
-      | _ -> false
-
-    let isalnum = function
-      | '0'..'9' -> true
-      | 'a'..'z' -> true
-      | 'A'..'Z' -> true
-      | _ -> false
-
-    let hexdigit = function
-      | '0' -> 0
-      | '1' -> 1
-      | '2' -> 2
-      | '3' -> 3
-      | '4' -> 4
-      | '5' -> 5
-      | '6' -> 6
-      | '7' -> 7
-      | '8' -> 8
-      | '9' -> 9
-      | 'a' | 'A' -> 10
-      | 'b' | 'B' -> 11
-      | 'c' | 'C' -> 12
-      | 'd' | 'D' -> 13
-      | 'e' | 'E' -> 14
-      | 'f' | 'F' -> 15
-      | _ -> -1
-end
-
-module String = struct
-    include String
-
-    let map f s =
-      let len = String.length s in
-      let b = Bytes.create len in
-      for i = 0 to len-1 do
-        Bytes.unsafe_set b i (f (unsafe_get s i))
-      done;
-      Bytes.to_string b
-
-    let lowercase_ascii s = map Char.lowercase_ascii s
-    let uppercase_ascii s = map Char.uppercase_ascii s
-
-    let capitalize_ascii s =
-      let b = Bytes.of_string s in
-      Bytes.unsafe_set b 0 (Char.uppercase_ascii (Bytes.unsafe_get b 0));
-      Bytes.to_string b
-
-    let is_prefix str prefix =
-      let n = length prefix in
-      length str >= n && sub str 0 n = prefix
-
-    let is_suffix str suffix =
-      let sufflen = length suffix
-      and len = length str in
-      len >= sufflen && sub str (len - sufflen) sufflen = suffix
-
-    let rec find s sub =
-      let len = length s in
-      let sublen = length sub in
-      let rec loop i =
-        if i <= len-sublen then (
-          let rec loop2 j =
-            if j < sublen then (
-              if s.[i+j] = sub.[j] then loop2 (j+1)
-              else -1
-            ) else
-              i (* found *)
-          in
-          let r = loop2 0 in
-          if r = -1 then loop (i+1) else r
-        ) else
-          -1 (* not found *)
-      in
-      loop 0
-
-    let rec replace s s1 s2 =
-      let len = length s in
-      let sublen = length s1 in
-      let i = find s s1 in
-      if i = -1 then s
-      else (
-        let s' = sub s 0 i in
-        let s'' = sub s (i+sublen) (len-i-sublen) in
-        s' ^ s2 ^ replace s'' s1 s2
-      )
-
-    let replace_char s c1 c2 =
-      let b2 = Bytes.of_string s in
-      let r = ref false in
-      for i = 0 to Bytes.length b2 - 1 do
-        if Bytes.unsafe_get b2 i = c1 then (
-          Bytes.unsafe_set b2 i c2;
-          r := true
-        )
-      done;
-      if not !r then s else Bytes.to_string b2
-
-    let rec nsplit sep str =
-      let len = length str in
-      let seplen = length sep in
-      let i = find str sep in
-      if i = -1 then [str]
-      else (
-        let s' = sub str 0 i in
-        let s'' = sub str (i+seplen) (len-i-seplen) in
-        s' :: nsplit sep s''
-      )
-
-    let split sep str =
-      let len = length sep in
-      let seplen = length str in
-      let i = find str sep in
-      if i = -1 then str, ""
-      else (
-        sub str 0 i, sub str (i + len) (seplen - i - len)
-      )
-
-    let rec lines_split str =
-      let buf = Buffer.create 16 in
-      let len = length str in
-      let rec loop start len =
-        try
-          let i = index_from str start '\n' in
-          if i > 0 && str.[i-1] = '\\' then (
-            Buffer.add_substring buf str start (i-start-1);
-            Buffer.add_char buf '\n';
-            loop (i+1) len
-          ) else (
-            Buffer.add_substring buf str start (i-start);
-            i+1
-          )
-        with Not_found ->
-          if len > 0 && str.[len-1] = '\\' then (
-            Buffer.add_substring buf str start (len-start-1);
-            Buffer.add_char buf '\n'
-          ) else
-            Buffer.add_substring buf str start (len-start);
-          len+1
-      in
-      let endi = loop 0 len in
-      let line = Buffer.contents buf in
-      if endi > len then
-        [line]
-      else
-        line :: lines_split (sub str endi (len-endi))
-
-    let random8 =
-      let chars = "abcdefghijklmnopqrstuvwxyz0123456789" in
-      fun () ->
-      concat "" (
-        List.map (
-          fun _ ->
-            let c = Random.int 36 in
-            let c = chars.[c] in
-            make 1 c
-        ) [1;2;3;4;5;6;7;8]
-      )
-
-    let triml ?(test = Char.isspace) str =
-      let i = ref 0 in
-      let n = ref (String.length str) in
-      while !n > 0 && test str.[!i]; do
-        decr n;
-        incr i
-      done;
-      if !i = 0 then str
-      else String.sub str !i !n
-
-    let trimr ?(test = Char.isspace) str =
-      let n = ref (String.length str) in
-      while !n > 0 && test str.[!n-1]; do
-        decr n
-      done;
-      if !n = String.length str then str
-      else String.sub str 0 !n
-
-    let trim ?(test = Char.isspace) str =
-      trimr ~test (triml ~test str)
-
-    let count_chars c str =
-      let count = ref 0 in
-      for i = 0 to String.length str - 1 do
-        if c = String.unsafe_get str i then incr count
-      done;
-      !count
-
-    let explode str =
-      let r = ref [] in
-      for i = 0 to String.length str - 1 do
-        let c = String.unsafe_get str i in
-        r := c :: !r;
-      done;
-      List.rev !r
-
-    let map_chars f str =
-      List.map f (explode str)
-
-    let spaces n = String.make n ' '
-end
-
-let (//) = Filename.concat
-let quote = Filename.quote
-
-let subdirectory parent path =
-  if path = parent then
-    ""
-  else if String.is_prefix path (parent // "") then (
-    let len = String.length parent in
-    String.sub path (len+1) (String.length path - len-1)
-  ) else
-    invalid_arg (sprintf "%S is not a path prefix of %S" parent path)
-
-let ( +^ ) = Int64.add
-let ( -^ ) = Int64.sub
-let ( *^ ) = Int64.mul
-let ( /^ ) = Int64.div
-let ( &^ ) = Int64.logand
-let ( ~^ ) = Int64.lognot
-
-external identity : 'a -> 'a = "%identity"
-
-let roundup64 i a = let a = a -^ 1L in (i +^ a) &^ (~^ a)
-let div_roundup64 i a = (i +^ a -^ 1L) /^ a
-
-let int_of_le32 str =
-  assert (String.length str = 4);
-  let c0 = Char.code (String.unsafe_get str 0) in
-  let c1 = Char.code (String.unsafe_get str 1) in
-  let c2 = Char.code (String.unsafe_get str 2) in
-  let c3 = Char.code (String.unsafe_get str 3) in
-  Int64.of_int c0 +^
-    (Int64.shift_left (Int64.of_int c1) 8) +^
-    (Int64.shift_left (Int64.of_int c2) 16) +^
-    (Int64.shift_left (Int64.of_int c3) 24)
-
-let le32_of_int i =
-  let c0 = i &^ 0xffL in
-  let c1 = Int64.shift_right (i &^ 0xff00L) 8 in
-  let c2 = Int64.shift_right (i &^ 0xff0000L) 16 in
-  let c3 = Int64.shift_right (i &^ 0xff000000L) 24 in
-  let b = Bytes.create 4 in
-  Bytes.unsafe_set b 0 (Char.unsafe_chr (Int64.to_int c0));
-  Bytes.unsafe_set b 1 (Char.unsafe_chr (Int64.to_int c1));
-  Bytes.unsafe_set b 2 (Char.unsafe_chr (Int64.to_int c2));
-  Bytes.unsafe_set b 3 (Char.unsafe_chr (Int64.to_int c3));
-  Bytes.to_string b
-
-type wrap_break_t = WrapEOS | WrapSpace | WrapNL
-
-let rec wrap ?(chan = stdout) ?(indent = 0) str =
-  let len = String.length str in
-  _wrap chan indent 0 0 len str
-
-and _wrap chan indent column i len str =
-  if i < len then (
-    let (j, break) = _wrap_find_next_break i len str in
-    let next_column =
-      if column + (j-i) >= 76 then (
-        output_char chan '\n';
-        output_spaces chan indent;
-        indent + (j-i) + 1
-      )
-      else column + (j-i) + 1 in
-    output chan (Bytes.of_string str) i (j-i);
-    match break with
-    | WrapEOS -> ()
-    | WrapSpace ->
-      output_char chan ' ';
-      _wrap chan indent next_column (j+1) len str
-    | WrapNL ->
-      output_char chan '\n';
-      output_spaces chan indent;
-      _wrap chan indent indent (j+1) len str
-  )
-
-and _wrap_find_next_break i len str =
-  if i >= len then (len, WrapEOS)
-  else if String.unsafe_get str i = ' ' then (i, WrapSpace)
-  else if String.unsafe_get str i = '\n' then (i, WrapNL)
-  else _wrap_find_next_break (i+1) len str
-
-and output_spaces chan n = for i = 0 to n-1 do output_char chan ' ' done
-
-let (|>) x f = f x
-
-(* Drop elements from a list while a predicate is true. *)
-let rec dropwhile f = function
-  | [] -> []
-  | x :: xs when f x -> dropwhile f xs
-  | xs -> xs
-
-(* Take elements from a list while a predicate is true. *)
-let rec takewhile f = function
-  | x :: xs when f x -> x :: takewhile f xs
-  | _ -> []
-
-let rec filter_map f = function
-  | [] -> []
-  | x :: xs ->
-      match f x with
-      | Some y -> y :: filter_map f xs
-      | None -> filter_map f xs
-
-let rec find_map f = function
-  | [] -> raise Not_found
-  | x :: xs ->
-      match f x with
-      | Some y -> y
-      | None -> find_map f xs
-
-let iteri f xs =
-  let rec loop i = function
-    | [] -> ()
-    | x :: xs -> f i x; loop (i+1) xs
-  in
-  loop 0 xs
-
-let rec mapi i f =
-  function
-  | [] -> []
-  | a::l ->
-    let r = f i a in
-    r :: mapi (i + 1) f l
-let mapi f l = mapi 0 f l
-
-let rec combine3 xs ys zs =
-  match xs, ys, zs with
-  | [], [], [] -> []
-  | x::xs, y::ys, z::zs -> (x, y, z) :: combine3 xs ys zs
-  | _ -> invalid_arg "combine3"
-
-let rec assoc ?(cmp = compare) ~default x = function
-  | [] -> default
-  | (y, y') :: _ when cmp x y = 0 -> y'
-  | _ :: ys -> assoc ~cmp ~default x ys
-
-let uniq ?(cmp = Pervasives.compare) xs =
-  let rec loop acc = function
-    | [] -> acc
-    | [x] -> x :: acc
-    | x :: (y :: _ as xs) when cmp x y = 0 ->
-       loop acc xs
-    | x :: (y :: _ as xs) ->
-       loop (x :: acc) xs
-  in
-  List.rev (loop [] xs)
-
-let sort_uniq ?(cmp = Pervasives.compare) xs =
-  let xs = List.sort cmp xs in
-  let xs = uniq ~cmp xs in
-  xs
-
-let remove_duplicates xs =
-  let h = Hashtbl.create (List.length xs) in
-  let rec loop = function
-    | [] -> []
-    | x :: xs when Hashtbl.mem h x -> xs
-    | x :: xs -> Hashtbl.add h x true; x :: loop xs
-  in
-  loop xs
-
-let push_back xsp x = xsp := !xsp @ [x]
-let push_front x xsp = xsp := x :: !xsp
-let pop_back xsp =
-  let x, xs =
-    match List.rev !xsp with
-    | x :: xs -> x, xs
-    | [] -> failwith "pop" in
-  xsp := List.rev xs;
-  x
-let pop_front xsp =
-  let x, xs =
-    match !xsp with
-    | x :: xs -> x, xs
-    | [] -> failwith "shift" in
-  xsp := xs;
-  x
-
-let append xsp xs = xsp := !xsp @ xs
-let prepend xs xsp = xsp := xs @ !xsp
-
-let unique = let i = ref 0 in fun () -> incr i; !i
-
-let may f = function
-  | None -> ()
-  | Some x -> f x
-
-type ('a, 'b) maybe = Either of 'a | Or of 'b
-
-let protect ~f ~finally =
-  let r =
-    try Either (f ())
-    with exn -> Or exn in
-  finally ();
-  match r with Either ret -> ret | Or exn -> raise exn
-
-let failwithf fs = ksprintf failwith fs
-
-exception Executable_not_found of string (* executable *)
-
-let which executable =
-  let paths =
-    try String.nsplit ":" (Sys.getenv "PATH")
-    with Not_found -> [] in
-  let paths = filter_map (
-    fun p ->
-      let path = p // executable in
-      try Unix.access path [Unix.X_OK]; Some path
-      with Unix.Unix_error _ -> None
-  ) paths in
-  match paths with
-  | [] -> raise (Executable_not_found executable)
-  | x :: _ -> x
-
-(* Program name. *)
-let prog = Filename.basename Sys.executable_name
-
-(* Stores the colours (--colours), quiet (--quiet), trace (-x) and
- * verbose (-v) flags in a global variable.
- *)
-let colours = ref false
-let set_colours () = colours := true
-let colours () = !colours
-
-let quiet = ref false
-let set_quiet () = quiet := true
-let quiet () = !quiet
-
-let trace = ref false
-let set_trace () = trace := true
-let trace () = !trace
-
-let verbose = ref false
-let set_verbose () = verbose := true
-let verbose () = !verbose
-
 (* ANSI terminal colours. *)
 let istty chan =
   Unix.isatty (Unix.descr_of_out_channel chan)
@@ -514,8 +41,6 @@ let ansi_magenta ?(chan = stdout) () =
 let ansi_restore ?(chan = stdout) () =
   if colours () || istty chan then output_string chan "\x1b[0m"
 
-(*</stdlib>*)
-
 (* Timestamped progress messages, used for ordinary messages when not
  * --quiet.
  *)
@@ -630,26 +155,6 @@ let virt_tools_data_dir =
   ) in
   fun () -> Lazy.force dir
 
-(*<stdlib>*)
-
-let read_whole_file path =
-  let buf = Buffer.create 16384 in
-  let chan = open_in path in
-  let maxlen = 16384 in
-  let b = Bytes.create maxlen in
-  let rec loop () =
-    let r = input chan b 0 maxlen in
-    if r > 0 then (
-      Buffer.add_substring buf (Bytes.to_string b) 0 r;
-      loop ()
-    )
-  in
-  loop ();
-  close_in chan;
-  Buffer.contents buf
-
-(*</stdlib>*)
-
 (* Parse a size field, eg. "10G". *)
 let parse_size =
   let const_re = Str.regexp "^\\([.0-9]+\\)\\([bKMG]\\)$" in
@@ -764,67 +269,6 @@ let create_standard_options argspec ?anon_fun ?(key_opts = false) usage_msg =
       else []) in
   Getopt.create argspec ?anon_fun usage_msg
 
-(*<stdlib>*)
-
-(* Compare two version strings intelligently. *)
-let rex_numbers = Str.regexp "^\\([0-9]+\\)\\(.*\\)$"
-let rex_letters = Str.regexp_case_fold "^\\([a-z]+\\)\\(.*\\)$"
-
-let compare_version v1 v2 =
-  let rec split_version = function
-    | "" -> []
-    | str ->
-      let first, rest =
-        if Str.string_match rex_numbers str 0 then (
-          let n = Str.matched_group 1 str in
-          let rest = Str.matched_group 2 str in
-          let n =
-            try `Number (int_of_string n)
-            with Failure _ -> `String n in
-          n, rest
-        )
-        else if Str.string_match rex_letters str 0 then
-          `String (Str.matched_group 1 str), Str.matched_group 2 str
-        else (
-          let len = String.length str in
-          `Char str.[0], String.sub str 1 (len-1)
-        ) in
-      first :: split_version rest
-  in
-  compare (split_version v1) (split_version v2)
-
-(* Annoying LVM2 returns a differing UUID strings for different
- * function calls (sometimes containing or not containing '-'
- * characters), so we have to normalize each string before
- * comparison.  c.f. 'compare_pvuuids' in virt-filesystem.
- *)
-let compare_lvm2_uuids uuid1 uuid2 =
-  let n1 = String.length uuid1 and n2 = String.length uuid2 in
-  let rec loop i1 i2 =
-    if i1 = n1 && i2 = n2 then 0            (* matching *)
-    else if i1 >= n1 then 1                 (* different lengths *)
-    else if i2 >= n2 then -1
-    else if uuid1.[i1] = '-' then loop (i1+1) i2 (* ignore '-' characters *)
-    else if uuid2.[i2] = '-' then loop i1 (i2+1)
-    else (
-      let c = compare uuid1.[i1] uuid2.[i2] in
-      if c <> 0 then c                          (* not matching *)
-      else loop (i1+1) (i2+1)
-    )
-  in
-  loop 0 0
-
-let stringify_args args =
-  let rec quote_args = function
-    | [] -> ""
-    | x :: xs -> " " ^ Filename.quote x ^ quote_args xs
-  in
-  match args with
-  | [] -> ""
-  | app :: xs -> app ^ quote_args xs
-
-(*</stdlib>*)
-
 (* Run an external command, slurp up the output as a list of lines. *)
 let external_command ?(echo_cmd = true) cmd =
   if echo_cmd then
@@ -942,31 +386,6 @@ let uuidgen () =
   if len < 10 then assert false; (* sanity check on uuidgen *)
   uuid
 
-(*<stdlib>*)
-
-(* Unlink a temporary file on exit. *)
-let unlink_on_exit =
-  let files = ref [] in
-  let registered_handlers = ref false in
-
-  let rec unlink_files () =
-    List.iter (
-      fun file -> try Unix.unlink file with _ -> ()
-    ) !files
-  and register_handlers () =
-    (* Unlink on exit. *)
-    at_exit unlink_files
-  in
-
-  fun file ->
-    files := file :: !files;
-    if not !registered_handlers then (
-      register_handlers ();
-      registered_handlers := true
-    )
-
-(*</stdlib>*)
-
 (* Remove a temporary directory on exit. *)
 let rmdir_on_exit =
   let dirs = ref [] in
@@ -1103,18 +522,6 @@ let detect_file_type filename =
   close_in chan;
   ret
 
-(*<stdlib>*)
-
-let is_block_device file =
-  try (Unix.stat file).Unix.st_kind = Unix.S_BLK
-  with Unix.Unix_error _ -> false
-
-let is_char_device file =
-  try (Unix.stat file).Unix.st_kind = Unix.S_CHR
-  with Unix.Unix_error _ -> false
-
-(*</stdlib>*)
-
 let is_partition dev =
   try
     if not (is_block_device dev) then false
@@ -1128,87 +535,6 @@ let is_partition dev =
     )
   with Unix.Unix_error _ -> false
 
-(*<stdlib>*)
-
-(* Annoyingly Sys.is_directory throws an exception on failure
- * (RHBZ#1022431).
- *)
-let is_directory path =
-  try Sys.is_directory path
-  with Sys_error _ -> false
-
-let absolute_path path =
-  if not (Filename.is_relative path) then path
-  else Sys.getcwd () // path
-
-let qemu_input_filename filename =
-  (* If the filename is something like "file:foo" then qemu-img will
-   * try to interpret that as "foo" in the file:/// protocol.  To
-   * avoid that, if the path is relative prefix it with "./" since
-   * qemu-img won't try to interpret such a path.
-   *)
-  if String.length filename > 0 && filename.[0] <> '/' then
-    "./" ^ filename
-  else
-    filename
-
-let rec mkdir_p path permissions =
-  try Unix.mkdir path permissions
-  with
-  | Unix.Unix_error (Unix.EEXIST, _, _) -> ()
-  | Unix.Unix_error (Unix.ENOENT, _, _) ->
-    (* A component in the path does not exist, so first try
-     * creating the parent directory, and then again the requested
-     * directory. *)
-    mkdir_p (Filename.dirname path) permissions;
-    Unix.mkdir path permissions
-
-let normalize_arch = function
-  | "i486" | "i586" | "i686" -> "i386"
-  | "amd64" -> "x86_64"
-  | "powerpc" -> "ppc"
-  | "powerpc64" -> "ppc64"
-  | "powerpc64le" -> "ppc64le"
-  | arch -> arch
-
-(* Are guest arch and host_cpu compatible, in terms of being able
- * to run commands in the libguestfs appliance?
- *)
-let guest_arch_compatible guest_arch =
-  let own = normalize_arch Guestfs_config.host_cpu in
-  let guest_arch = normalize_arch guest_arch in
-  match own, guest_arch with
-  | x, y when x = y -> true
-  | "x86_64", "i386" -> true
-  | _ -> false
-
-(* Is the guest OS "Unix-like"? *)
-let unix_like = function
-  | "hurd"
-  | "linux"
-  | "minix" -> true
-  | typ when String.is_suffix typ "bsd" -> true
-  | _ -> false
-
-(** Return the last part of a string, after the specified separator. *)
-let last_part_of str sep =
-  try
-    let i = String.rindex str sep in
-    Some (String.sub str (i+1) (String.length str - (i+1)))
-  with Not_found -> None
-
-let read_first_line_from_file filename =
-  let chan = open_in filename in
-  let line = try input_line chan with End_of_file -> "" in
-  close_in chan;
-  line
-
-let is_regular_file path = (* NB: follows symlinks. *)
-  try (Unix.stat path).Unix.st_kind = Unix.S_REG
-  with Unix.Unix_error _ -> false
-
-(*</stdlib>*)
-
 let inspect_mount_root g ?mount_opts_fn root =
   let mps = g#inspect_get_mountpoints root in
   let cmp (a,_) (b,_) =
diff --git a/mllib/common_utils.mli b/mllib/common_utils.mli
index 376274849..fa4d15054 100644
--- a/mllib/common_utils.mli
+++ b/mllib/common_utils.mli
@@ -16,280 +16,6 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-(* The parts between <stdlib>..</stdlib> are copied into the
- * generator/common_utils.ml file.  These parts must ONLY use
- * functions from the OCaml stdlib.
- *)
-(*<stdlib>*)
-
-module Char : sig
-    type t = char
-    val chr : int -> char
-    val code : char -> int
-    val compare: t -> t -> int
-    val escaped : char -> string
-    val unsafe_chr : int -> char
-
-    val lowercase_ascii : char -> char
-    val uppercase_ascii : char -> char
-
-    val isspace : char -> bool
-    (** Return true if char is a whitespace character. *)
-    val isdigit : char -> bool
-    (** Return true if the character is a digit [[0-9]]. *)
-    val isxdigit : char -> bool
-    (** Return true if the character is a hex digit [[0-9a-fA-F]]. *)
-    val isalpha : char -> bool
-    (** Return true if the character is a US ASCII 7 bit alphabetic. *)
-    val isalnum : char -> bool
-    (** Return true if the character is a US ASCII 7 bit alphanumeric. *)
-
-    val hexdigit : char -> int
-    (** Return the value of a hex digit.  If the char is not in
-        the set [[0-9a-fA-F]] then this returns [-1]. *)
-end
-(** Override the Char module from stdlib. *)
-
-module String : sig
-    type t = string
-    val compare: t -> t -> int
-    val concat : string -> string list -> string
-    val contains : string -> char -> bool
-    val contains_from : string -> int -> char -> bool
-    val copy : string -> string
-    val escaped : string -> string
-    val get : string -> int -> char
-    val index : string -> char -> int
-    val index_from : string -> int -> char -> int
-    val iter : (char -> unit) -> string -> unit
-    val length : string -> int
-    val make : int -> char -> string
-    val rcontains_from : string -> int -> char -> bool
-    val rindex : string -> char -> int
-    val rindex_from : string -> int -> char -> int
-    val sub : string -> int -> int -> string
-    val unsafe_get : string -> int -> char
-
-    val map : (char -> char) -> string -> string
-
-    val lowercase_ascii : string -> string
-    val uppercase_ascii : string -> string
-    val capitalize_ascii : string -> string
-
-    val is_prefix : string -> string -> bool
-    (** [is_prefix str prefix] returns true if [prefix] is a prefix of [str]. *)
-    val is_suffix : string -> string -> bool
-    (** [is_suffix str suffix] returns true if [suffix] is a suffix of [str]. *)
-    val find : string -> string -> int
-    (** [find str sub] searches for [sub] as a substring of [str].  If
-        found it returns the index.  If not found, it returns [-1]. *)
-    val replace : string -> string -> string -> string
-    (** [replace str s1 s2] replaces all instances of [s1] appearing in
-        [str] with [s2]. *)
-    val replace_char : string -> char -> char -> string
-    (** Replace character in string. *)
-    val nsplit : string -> string -> string list
-    (** [nsplit sep str] splits [str] into multiple strings at each
-        separator [sep]. *)
-    val split : string -> string -> string * string
-    (** [split sep str] splits [str] at the first occurrence of the
-        separator [sep], returning the part before and the part after.
-        If separator is not found, return the whole string and an
-        empty string. *)
-    val lines_split : string -> string list
-    (** [lines_split str] splits [str] into lines, keeping continuation
-        characters (i.e. [\] at the end of lines) into account. *)
-    val random8 : unit -> string
-    (** Return a string of 8 random printable characters. *)
-    val triml : ?test:(char -> bool) -> string -> string
-    (** Trim left. *)
-    val trimr : ?test:(char -> bool) -> string -> string
-    (** Trim right. *)
-    val trim : ?test:(char -> bool) -> string -> string
-    (** Trim left and right. *)
-    val count_chars : char -> string -> int
-    (** Count number of times the character occurs in string. *)
-    val explode : string -> char list
-    (** Explode a string into a list of characters. *)
-    val map_chars : (char -> 'a) -> string -> 'a list
-    (** Explode string, then map function over the characters. *)
-    val spaces : int -> string
-    (** [spaces n] creates a string of n spaces. *)
-end
-(** Override the String module from stdlib. *)
-
-val ( // ) : string -> string -> string
-(** Concatenate directory and filename. *)
-
-val quote : string -> string
-(** Shell-safe quoting of a string (alias for {!Filename.quote}). *)
-
-val subdirectory : string -> string -> string
-(** [subdirectory parent path] returns subdirectory part of [path] relative
-    to the [parent]. If [path] and [parent] point to the same directory empty
-    string is returned.
-
-    Note: path normalization on arguments is {b not} performed!
-
-    If [parent] is not a path prefix of [path] the function raises
-    [Invalid_argument]. *)
-
-val ( +^ ) : int64 -> int64 -> int64
-val ( -^ ) : int64 -> int64 -> int64
-val ( *^ ) : int64 -> int64 -> int64
-val ( /^ ) : int64 -> int64 -> int64
-val ( &^ ) : int64 -> int64 -> int64
-val ( ~^ ) : int64 -> int64
-(** Various int64 operators. *)
-
-external identity : 'a -> 'a = "%identity"
-
-val roundup64 : int64 -> int64 -> int64
-(** [roundup64 i a] returns [i] rounded up to the next multiple of [a]. *)
-val div_roundup64 : int64 -> int64 -> int64
-(** [div_roundup64 i a] returns [i] rounded up to the next multiple of [a],
-    with the result divided by [a]. *)
-val int_of_le32 : string -> int64
-(** Unpack a 4 byte string as a little endian 32 bit integer. *)
-val le32_of_int : int64 -> string
-(** Pack a 32 bit integer a 4 byte string stored little endian. *)
-
-val wrap : ?chan:out_channel -> ?indent:int -> string -> unit
-(** Wrap text. *)
-
-val output_spaces : out_channel -> int -> unit
-(** Write [n] spaces to [out_channel]. *)
-
-val (|>) : 'a -> ('a -> 'b) -> 'b
-(** Added in OCaml 4.01, we can remove our definition when we
-    can assume this minimum version of OCaml. *)
-
-val dropwhile : ('a -> bool) -> 'a list -> 'a list
-(** [dropwhile f xs] drops leading elements from [xs] until
-    [f] returns false. *)
-val takewhile : ('a -> bool) -> 'a list -> 'a list
-(** [takewhile f xs] takes leading elements from [xs] until
-    [f] returns false.
-
-    For any list [xs] and function [f],
-    [xs = takewhile f xs @ dropwhile f xs] *)
-val filter_map : ('a -> 'b option) -> 'a list -> 'b list
-(** [filter_map f xs] applies [f] to each element of [xs].  If
-    [f x] returns [Some y] then [y] is added to the returned list. *)
-val find_map : ('a -> 'b option) -> 'a list -> 'b
-(** [find_map f xs] applies [f] to each element of [xs] until
-    [f x] returns [Some y].  It returns [y].  If we exhaust the
-    list then this raises [Not_found]. *)
-val iteri : (int -> 'a -> 'b) -> 'a list -> unit
-(** [iteri f xs] calls [f i x] for each element, with [i] counting from [0]. *)
-val mapi : (int -> 'a -> 'b) -> 'a list -> 'b list
-(** [mapi f xs] calls [f i x] for each element, with [i] counting from [0],
-    forming the return values from [f] into another list. *)
-
-val combine3 : 'a list -> 'b list -> 'c list -> ('a * 'b * 'c) list
-(** Like {!List.combine} but for triples.  All lists must be the same length. *)
-
-val assoc : ?cmp:('a -> 'a -> int) -> default:'b -> 'a -> ('a * 'b) list -> 'b
-(** Like {!List.assoc} but with a user-defined comparison function, and
-    instead of raising [Not_found], it returns the [~default] value. *)
-
-val uniq : ?cmp:('a -> 'a -> int) -> 'a list -> 'a list
-(** Uniquify a list (the list must be sorted first). *)
-
-val sort_uniq : ?cmp:('a -> 'a -> int) -> 'a list -> 'a list
-(** Sort and uniquify a list. *)
-
-val remove_duplicates : 'a list -> 'a list
-(** Remove duplicates from an unsorted list; useful when the order
-    of the elements matter.
-
-    Please use [sort_uniq] when the order does not matter. *)
-
-val push_back : 'a list ref -> 'a -> unit
-val push_front : 'a -> 'a list ref -> unit
-val pop_back : 'a list ref -> 'a
-val pop_front : 'a list ref -> 'a
-(** Imperative list manipulation functions, similar to C++ STL
-    functions with the same names.  (Although the names are similar,
-    the computational complexity of the functions is quite different.)
-
-    These operate on list references, and each function modifies the
-    list reference that is passed to it.
-
-    [push_back xsp x] appends the element [x] to the end of the list
-    [xsp].  This function is not tail-recursive.
-
-    [push_front x xsp] prepends the element [x] to the head of the
-    list [xsp].  (The arguments are reversed compared to the same Perl
-    function, but OCaml is type safe so that's OK.)
-
-    [pop_back xsp] removes the last element of the list [xsp] and
-    returns it.  The list is modified to become the list minus the
-    final element.  If a zero-length list is passed in, this raises
-    [Failure "pop_back"].  This function is not tail-recursive.
-
-    [pop_front xsp] removes the head element of the list [xsp] and
-    returns it.  The list is modified to become the tail of the list.
-    If a zero-length list is passed in, this raises [Failure
-    "pop_front"]. *)
-
-val append : 'a list ref -> 'a list -> unit
-val prepend : 'a list -> 'a list ref -> unit
-(** More imperative list manipulation functions.
-
-    [append] is like {!push_back} above, except it appends a list to
-    the list reference.  This function is not tail-recursive.
-
-    [prepend] is like {!push_front} above, except it prepends a list
-    to the list reference. *)
-
-val unique : unit -> int
-(** Returns a unique number each time called. *)
-
-val may : ('a -> unit) -> 'a option -> unit
-(** [may f (Some x)] runs [f x].  [may f None] does nothing. *)
-
-type ('a, 'b) maybe = Either of 'a | Or of 'b
-(** Like the Haskell [Either] type. *)
-
-val protect : f:(unit -> 'a) -> finally:(unit -> unit) -> 'a
-(** Execute [~f] and afterwards execute [~finally].
-
-    If [~f] throws an exception then [~finally] is run and the
-    original exception from [~f] is re-raised.
-
-    If [~finally] throws an exception, then the original exception
-    is lost. (NB: Janestreet core {!Exn.protectx}, on which this
-    function is modelled, doesn't throw away the exception in this
-    case, but requires a lot more work by the caller.  Perhaps we
-    will change this in future.) *)
-
-val failwithf : ('a, unit, string, 'b) format4 -> 'a
-(** Like [failwith] but supports printf-like arguments. *)
-
-exception Executable_not_found of string (* executable *)
-(** Exception thrown by [which] when the specified executable is not found
-    in [$PATH]. *)
-
-val which : string -> string
-(** Return the full path of the specified executable from [$PATH].
-
-    Throw [Executable_not_found] if not available. *)
-
-val prog : string
-(** The program name (derived from {!Sys.executable_name}). *)
-
-val set_quiet : unit -> unit
-val quiet : unit -> bool
-val set_trace : unit -> unit
-val trace : unit -> bool
-val set_verbose : unit -> unit
-val verbose : unit -> bool
-(** Stores the quiet ([--quiet]), trace ([-x]) and verbose ([-v]) flags
-    in global variables. *)
-
-(*</stdlib>*)
-
 val message : ('a, unit, string, unit) format4 -> 'a
 (** Timestamped progress messages.  Used for ordinary messages when
     not [--quiet]. *)
@@ -328,13 +54,6 @@ val virt_tools_data_dir : unit -> string
     the environment variable is not set, a default value is
     calculated based on configure settings. *)
 
-(*<stdlib>*)
-
-val read_whole_file : string -> string
-(** Read in the whole file as a string. *)
-
-(*</stdlib>*)
-
 val parse_size : string -> int64
 (** Parse a size field, eg. [10G] *)
 
@@ -354,20 +73,6 @@ val create_standard_options : Getopt.speclist -> ?anon_fun:Getopt.anon_fun -> ?k
 
     Returns a new [Getopt.t] handle. *)
 
-(*<stdlib>*)
-
-val compare_version : string -> string -> int
-(** Compare two version strings. *)
-
-val compare_lvm2_uuids : string -> string -> int
-(** Compare two LVM2 UUIDs, ignoring '-' characters. *)
-
-val stringify_args : string list -> string
-(** Create a "pretty-print" representation of a program invocation
-    (i.e. executable and its arguments). *)
-
-(*</stdlib>*)
-
 val external_command : ?echo_cmd:bool -> string -> string list
 (** Run an external command, slurp up the output as a list of lines.
 
@@ -408,13 +113,6 @@ val shell_command : ?echo_cmd:bool -> string -> int
 val uuidgen : unit -> string
 (** Run uuidgen to return a random UUID. *)
 
-(*<stdlib>*)
-
-val unlink_on_exit : string -> unit
-(** Unlink a temporary file on exit. *)
-
-(*</stdlib>*)
-
 val rmdir_on_exit : string -> unit
 (** Remove a temporary directory on exit (using [rm -rf]). *)
 
@@ -450,55 +148,10 @@ val debug_augeas_errors : Guestfs.guestfs -> unit
 val detect_file_type : string -> [`GZip | `Tar | `XZ | `Zip | `Unknown]
 (** Detect type of a file (for a very limited range of file types). *)
 
-(*<stdlib>*)
-
-val is_block_device : string -> bool
-val is_char_device : string -> bool
-val is_directory : string -> bool
-(** These don't throw exceptions, unlike the [Sys] functions. *)
-
-(*</stdlib>*)
-
 val is_partition : string -> bool
 (** Return true if the host device [dev] is a partition.  If it's
     anything else, or missing, returns false. *)
 
-(*<stdlib>*)
-
-val absolute_path : string -> string
-(** Convert any path to an absolute path. *)
-
-val qemu_input_filename : string -> string
-(** Sanitizes a filename for passing it safely to qemu/qemu-img. *)
-
-val mkdir_p : string -> int -> unit
-(** Creates a directory, and its parents if missing. *)
-
-val normalize_arch : string -> string
-(** Normalize the architecture name, i.e. maps it into a defined
-    identifier for it -- e.g. i386, i486, i586, and i686 are
-    normalized as i386. *)
-
-val guest_arch_compatible : string -> bool
-(** Are guest arch and host_cpu compatible, in terms of being able
-    to run commands in the libguestfs appliance? *)
-
-val unix_like : string -> bool
-(** Is the guest OS "Unix-like"?  Call this with the result of
-    {!Guestfs.inspect_get_type}. *)
-
-val last_part_of : string -> char -> string option
-(** Return the last part of a string, after the specified separator. *)
-
-val read_first_line_from_file : string -> string
-(** Read only the first line (i.e. until the first newline character)
-    of a file.  If the file is empty this returns an empty string. *)
-
-val is_regular_file : string -> bool
-(** Checks whether the file is a regular file. *)
-
-(*</stdlib>*)
-
 val inspect_mount_root : Guestfs.guestfs -> ?mount_opts_fn:(string -> string) -> string -> unit
 (** Mounts all the mount points of the specified root, just like
     [guestfish -i] does.
diff --git a/mllib/common_utils_tests.ml b/mllib/common_utils_tests.ml
index 4c9f53fdf..ee8a60463 100644
--- a/mllib/common_utils_tests.ml
+++ b/mllib/common_utils_tests.ml
@@ -19,26 +19,16 @@
 (* This file tests the Common_utils module. *)
 
 open OUnit2
+
+open Std_utils
 open Common_utils
 
 (* Utils. *)
 let assert_equal_string = assert_equal ~printer:(fun x -> x)
 let assert_equal_int = assert_equal ~printer:(fun x -> string_of_int x)
 let assert_equal_int64 = assert_equal ~printer:(fun x -> Int64.to_string x)
-let assert_equal_stringlist = assert_equal ~printer:(fun x -> "(" ^ (String.escaped (String.concat "," x)) ^ ")")
 let assert_equal_intlist = assert_equal ~printer:(fun x -> "(" ^ (String.concat ";" (List.map string_of_int x)) ^ ")")
 
-let test_subdirectory ctx =
-  assert_equal_string "" (subdirectory "/foo" "/foo");
-  assert_equal_string "" (subdirectory "/foo" "/foo/");
-  assert_equal_string "bar" (subdirectory "/foo" "/foo/bar");
-  assert_equal_string "bar/baz" (subdirectory "/foo" "/foo/bar/baz")
-
-(* Test Common_utils.int_of_le32 and Common_utils.le32_of_int. *)
-let test_le32 ctx =
-  assert_equal_int64 0x20406080L (int_of_le32 "\x80\x60\x40\x20");
-  assert_equal_string "\x80\x60\x40\x20" (le32_of_int 0x20406080L)
-
 (* Test Common_utils.parse_size. *)
 let test_parse_resize ctx =
   (* For absolute sizes, oldsize is ignored. *)
@@ -91,47 +81,6 @@ let test_human_size ctx =
   assert_equal_string "3.4G" (human_size 3650722201_L);
   assert_equal_string "-3.4G" (human_size (-3650722201_L))
 
-(* Test Common_utils.String.is_prefix. *)
-let test_string_is_prefix ctx =
-  assert_bool "String.is_prefix,," (String.is_prefix "" "");
-  assert_bool "String.is_prefix,foo," (String.is_prefix "foo" "");
-  assert_bool "String.is_prefix,foo,foo" (String.is_prefix "foo" "foo");
-  assert_bool "String.is_prefix,foo123,foo" (String.is_prefix "foo123" "foo");
-  assert_bool "not (String.is_prefix,,foo" (not (String.is_prefix "" "foo"))
-
-(* Test Common_utils.String.is_suffix. *)
-let test_string_is_suffix ctx =
-  assert_bool "String.is_suffix,," (String.is_suffix "" "");
-  assert_bool "String.is_suffix,foo," (String.is_suffix "foo" "");
-  assert_bool "String.is_suffix,foo,foo" (String.is_suffix "foo" "foo");
-  assert_bool "String.is_suffix,123foo,foo" (String.is_suffix "123foo" "foo");
-  assert_bool "not String.is_suffix,,foo" (not (String.is_suffix "" "foo"))
-
-(* Test Common_utils.String.find. *)
-let test_string_find ctx =
-  assert_equal_int 0 (String.find "" "");
-  assert_equal_int 0 (String.find "foo" "");
-  assert_equal_int 1 (String.find "foo" "o");
-  assert_equal_int 3 (String.find "foobar" "bar");
-  assert_equal_int (-1) (String.find "" "baz");
-  assert_equal_int (-1) (String.find "foobar" "baz")
-
-(* Test Common_utils.String.lines_split. *)
-let test_string_lines_split ctx =
-  assert_equal_stringlist [""] (String.lines_split "");
-  assert_equal_stringlist ["A"] (String.lines_split "A");
-  assert_equal_stringlist ["A"; ""] (String.lines_split "A\n");
-  assert_equal_stringlist ["A"; "B"] (String.lines_split "A\nB");
-  assert_equal_stringlist ["A"; "B"; "C"] (String.lines_split "A\nB\nC");
-  assert_equal_stringlist ["A"; "B"; "C"; "D"] (String.lines_split "A\nB\nC\nD");
-  assert_equal_stringlist ["A\n"] (String.lines_split "A\\");
-  assert_equal_stringlist ["A\nB"] (String.lines_split "A\\\nB");
-  assert_equal_stringlist ["A"; "B\nC"] (String.lines_split "A\nB\\\nC");
-  assert_equal_stringlist ["A"; "B\nC"; "D"] (String.lines_split "A\nB\\\nC\nD");
-  assert_equal_stringlist ["A"; "B\nC\nD"] (String.lines_split "A\nB\\\nC\\\nD");
-  assert_equal_stringlist ["A\nB"; ""] (String.lines_split "A\\\nB\n");
-  assert_equal_stringlist ["A\nB\n"] (String.lines_split "A\\\nB\\\n")
-
 (* Test Common_utils.run_command. *)
 let test_run_command ctx =
   assert_equal_int 0 (run_command ["true"]);
@@ -203,14 +152,8 @@ let test_run_commands ctx =
 let suite =
   "mllib Common_utils" >:::
     [
-      "subdirectory" >:: test_subdirectory;
-      "numeric.le32" >:: test_le32;
       "sizes.parse_resize" >:: test_parse_resize;
       "sizes.human_size" >:: test_human_size;
-      "strings.is_prefix" >:: test_string_is_prefix;
-      "strings.is_suffix" >:: test_string_is_suffix;
-      "strings.find" >:: test_string_find;
-      "strings.lines_split" >:: test_string_lines_split;
       "run_command" >:: test_run_command;
       "run_commands" >:: test_run_commands;
     ]
diff --git a/mllib/curl.ml b/mllib/curl.ml
index ed0b8960a..ccf98acef 100644
--- a/mllib/curl.ml
+++ b/mllib/curl.ml
@@ -18,6 +18,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 
 type t = {
diff --git a/mllib/getopt_tests.ml b/mllib/getopt_tests.ml
index 9d432e922..22e4282fa 100644
--- a/mllib/getopt_tests.ml
+++ b/mllib/getopt_tests.ml
@@ -22,6 +22,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Getopt.OptionName
 
diff --git a/mllib/regedit.ml b/mllib/regedit.ml
index dd03f5a23..e07700bb1 100644
--- a/mllib/regedit.ml
+++ b/mllib/regedit.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/mllib/registry.ml b/mllib/registry.ml
index 767092c6d..8d62e3bb5 100644
--- a/mllib/registry.ml
+++ b/mllib/registry.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 type node = int64
 type value = int64
diff --git a/mllib/xpath_helpers.ml b/mllib/xpath_helpers.ml
index d651fab23..e6185bf3d 100644
--- a/mllib/xpath_helpers.ml
+++ b/mllib/xpath_helpers.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 (* Parse an xpath expression and return a string/int.  Returns
  * [Some v], or [None] if the expression doesn't match.
diff --git a/resize/Makefile.am b/resize/Makefile.am
index c35c3a78a..3707d73b4 100644
--- a/resize/Makefile.am
+++ b/resize/Makefile.am
@@ -61,6 +61,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/common/mlprogress \
 	-I $(top_builddir)/mllib
 if HAVE_OCAML_PKG_GETTEXT
@@ -84,6 +85,7 @@ OBJECTS = $(XOBJECTS)
 endif
 
 OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
 	mlguestfs.$(MLARCHIVE) \
 	mlprogress.$(MLARCHIVE) \
 	mllib.$(MLARCHIVE) \
@@ -91,6 +93,7 @@ OCAMLLINKFLAGS = \
 
 virt_resize_DEPENDENCIES = \
 	$(OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
 virt_resize_LINK = \
@@ -135,7 +138,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mllib $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mlstdutils -I $(abs_top_builddir)/mllib $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/resize/resize.ml b/resize/resize.ml
index c52db199f..fbb2d021b 100644
--- a/resize/resize.ml
+++ b/resize/resize.ml
@@ -18,6 +18,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Unix_utils
diff --git a/sparsify/Makefile.am b/sparsify/Makefile.am
index 97236829e..a1395ccbd 100644
--- a/sparsify/Makefile.am
+++ b/sparsify/Makefile.am
@@ -66,6 +66,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/common/mlprogress \
 	-I $(top_builddir)/mllib
 if HAVE_OCAML_PKG_GETTEXT
@@ -89,6 +90,7 @@ OBJECTS = $(XOBJECTS)
 endif
 
 OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
 	mlguestfs.$(MLARCHIVE) \
 	mlprogress.$(MLARCHIVE) \
 	mllib.$(MLARCHIVE) \
@@ -96,6 +98,7 @@ OCAMLLINKFLAGS = \
 
 virt_sparsify_DEPENDENCIES = \
 	$(OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
 virt_sparsify_LINK = \
@@ -142,7 +145,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mllib $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlstdutils -I $(abs_top_builddir)/mllib $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/sparsify/cmdline.ml b/sparsify/cmdline.ml
index 4629aa7a4..6e0594f12 100644
--- a/sparsify/cmdline.ml
+++ b/sparsify/cmdline.ml
@@ -20,8 +20,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Utils
diff --git a/sparsify/copying.ml b/sparsify/copying.ml
index 9042bd53d..02a53b9b4 100644
--- a/sparsify/copying.ml
+++ b/sparsify/copying.ml
@@ -23,6 +23,7 @@
 open Unix
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Unix_utils
diff --git a/sparsify/in_place.ml b/sparsify/in_place.ml
index 88f30c0b3..1f3da2c70 100644
--- a/sparsify/in_place.ml
+++ b/sparsify/in_place.ml
@@ -21,6 +21,7 @@
 open Unix
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/sparsify/utils.ml b/sparsify/utils.ml
index 3bb64b737..27723c3a2 100644
--- a/sparsify/utils.ml
+++ b/sparsify/utils.ml
@@ -20,7 +20,7 @@
 
 open Printf
 
-open Common_utils
+open Std_utils
 
 module G = Guestfs
 
diff --git a/sysprep/Makefile.am b/sysprep/Makefile.am
index 68cb1814a..c2adb1a6e 100644
--- a/sysprep/Makefile.am
+++ b/sysprep/Makefile.am
@@ -112,6 +112,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
 	-I $(top_builddir)/common/visit/.libs \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/common/mlvisit \
 	-I $(top_builddir)/mllib \
 	-I $(top_builddir)/customize
@@ -137,6 +138,7 @@ OBJECTS = $(XOBJECTS)
 endif
 
 OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
 	mlguestfs.$(MLARCHIVE) \
 	mllib.$(MLARCHIVE) \
 	mlvisit.$(MLARCHIVE) \
@@ -145,6 +147,7 @@ OCAMLLINKFLAGS = \
 
 virt_sysprep_DEPENDENCIES = \
 	$(OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	../customize/customize.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
@@ -213,7 +216,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/mlstdutils -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/sysprep/main.ml b/sysprep/main.ml
index 82164c62f..ab631c479 100644
--- a/sysprep/main.ml
+++ b/sysprep/main.ml
@@ -19,6 +19,7 @@
 open Unix
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
diff --git a/sysprep/sysprep_operation.ml b/sysprep/sysprep_operation.ml
index b2286f642..17d298fc1 100644
--- a/sysprep/sysprep_operation.ml
+++ b/sysprep/sysprep_operation.ml
@@ -16,10 +16,10 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_utils
-
 open Printf
 
+open Std_utils
+open Common_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
 
diff --git a/sysprep/sysprep_operation_backup_files.ml b/sysprep/sysprep_operation_backup_files.ml
index 6b1a100e6..64df8d758 100644
--- a/sysprep/sysprep_operation_backup_files.ml
+++ b/sysprep/sysprep_operation_backup_files.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Visit
 open Unix_utils.Fnmatch
 open Sysprep_operation
diff --git a/sysprep/sysprep_operation_cron_spool.ml b/sysprep/sysprep_operation_cron_spool.ml
index 063f75a83..f48a5201a 100644
--- a/sysprep/sysprep_operation_cron_spool.ml
+++ b/sysprep/sysprep_operation_cron_spool.ml
@@ -16,9 +16,11 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Sysprep_operation
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
+
+open Sysprep_operation
 
 module G = Guestfs
 
diff --git a/sysprep/sysprep_operation_net_hostname.ml b/sysprep/sysprep_operation_net_hostname.ml
index 7284d630f..b455e5c93 100644
--- a/sysprep/sysprep_operation_net_hostname.ml
+++ b/sysprep/sysprep_operation_net_hostname.ml
@@ -16,10 +16,12 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
-open Sysprep_operation
 open Common_gettext.Gettext
 
+open Sysprep_operation
+
 module G = Guestfs
 
 let net_hostname_perform (g : Guestfs.guestfs) root side_effects =
diff --git a/sysprep/sysprep_operation_net_hwaddr.ml b/sysprep/sysprep_operation_net_hwaddr.ml
index 439da6d81..21cae1be4 100644
--- a/sysprep/sysprep_operation_net_hwaddr.ml
+++ b/sysprep/sysprep_operation_net_hwaddr.ml
@@ -16,10 +16,12 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
-open Sysprep_operation
 open Common_gettext.Gettext
 
+open Sysprep_operation
+
 module G = Guestfs
 
 let net_hwaddr_perform (g : Guestfs.guestfs) root side_effects =
diff --git a/sysprep/sysprep_operation_script.ml b/sysprep/sysprep_operation_script.ml
index aa656727e..cf911043a 100644
--- a/sysprep/sysprep_operation_script.ml
+++ b/sysprep/sysprep_operation_script.ml
@@ -19,9 +19,10 @@
 open Printf
 open Unix
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Sysprep_operation
diff --git a/sysprep/sysprep_operation_user_account.ml b/sysprep/sysprep_operation_user_account.ml
index 6f44b9dfd..2a633f5d8 100644
--- a/sysprep/sysprep_operation_user_account.ml
+++ b/sysprep/sysprep_operation_user_account.ml
@@ -19,6 +19,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 open Getopt.OptionName
diff --git a/v2v/DOM.ml b/v2v/DOM.ml
index 29ce64fa6..9986fc912 100644
--- a/v2v/DOM.ml
+++ b/v2v/DOM.ml
@@ -18,6 +18,7 @@
 
 (* Poor man's XML DOM, mutable for ease of modification. *)
 
+open Std_utils
 open Common_utils
 
 open Printf
diff --git a/v2v/Makefile.am b/v2v/Makefile.am
index 2de99ceb9..8a831a700 100644
--- a/v2v/Makefile.am
+++ b/v2v/Makefile.am
@@ -146,6 +146,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/common/mlxml \
 	-I $(top_builddir)/mllib \
 	-I $(top_builddir)/customize
@@ -170,6 +171,7 @@ OBJECTS = $(XOBJECTS)
 endif
 
 OCAMLLINKFLAGS = \
+	mlstdutils.$(MLARCHIVE) \
 	mlguestfs.$(MLARCHIVE) \
 	mlxml.$(MLARCHIVE) \
 	mllib.$(MLARCHIVE) \
@@ -210,6 +212,7 @@ endif
 
 virt_v2v_copy_to_local_DEPENDENCIES = \
 	$(COPY_TO_LOCAL_OBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../common/mlxml/mlxml.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
@@ -495,6 +498,7 @@ endif
 
 v2v_unit_tests_DEPENDENCIES = \
 	$(v2v_unit_tests_THEOBJECTS) \
+	../common/mlstdutils/mlstdutils.$(MLARCHIVE) \
 	../common/mlxml/mlxml.$(MLARCHIVE) \
 	../mllib/mllib.$(MLARCHIVE) \
 	$(top_srcdir)/ocaml-link.sh
@@ -510,7 +514,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlxml -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize $^ | \
+	$(OCAMLFIND) ocamldep -I ../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlstdutils -I $(abs_top_builddir)/common/mlxml -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/v2v/changeuid.ml b/v2v/changeuid.ml
index dbb05bc94..639fcfe12 100644
--- a/v2v/changeuid.ml
+++ b/v2v/changeuid.ml
@@ -21,9 +21,10 @@
 open Unix
 open Printf
 
+open Std_utils
 open Common_utils
-open Common_gettext.Gettext
 open Unix_utils
+open Common_gettext.Gettext
 
 open Utils
 
diff --git a/v2v/cmdline.ml b/v2v/cmdline.ml
index 70301ab40..a19510b3f 100644
--- a/v2v/cmdline.ml
+++ b/v2v/cmdline.ml
@@ -20,8 +20,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Types
diff --git a/v2v/convert_linux.ml b/v2v/convert_linux.ml
index 42a19947b..ffb43564f 100644
--- a/v2v/convert_linux.ml
+++ b/v2v/convert_linux.ml
@@ -28,8 +28,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 open Types
diff --git a/v2v/convert_windows.ml b/v2v/convert_windows.ml
index dfb90d079..2c8708878 100644
--- a/v2v/convert_windows.ml
+++ b/v2v/convert_windows.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Utils
 open Types
diff --git a/v2v/copy_to_local.ml b/v2v/copy_to_local.ml
index 88fd9abde..0a2b7ed75 100644
--- a/v2v/copy_to_local.ml
+++ b/v2v/copy_to_local.ml
@@ -20,8 +20,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 open Getopt.OptionName
 
 open Utils
diff --git a/v2v/create_libvirt_xml.ml b/v2v/create_libvirt_xml.ml
index 246cacd21..3f22f3764 100644
--- a/v2v/create_libvirt_xml.ml
+++ b/v2v/create_libvirt_xml.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/create_ovf.ml b/v2v/create_ovf.ml
index 6c7aba6d7..fd7ec5fe8 100644
--- a/v2v/create_ovf.ml
+++ b/v2v/create_ovf.ml
@@ -18,12 +18,13 @@
 
 (* Create OVF and related files for RHV. *)
 
-open Common_gettext.Gettext
-open Common_utils
-
 open Unix
 open Printf
 
+open Std_utils
+open Common_utils
+open Common_gettext.Gettext
+
 open Types
 open Utils
 open DOM
diff --git a/v2v/input_disk.ml b/v2v/input_disk.ml
index d28f45ece..a92f3a602 100644
--- a/v2v/input_disk.ml
+++ b/v2v/input_disk.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/input_libvirtxml.ml b/v2v/input_libvirtxml.ml
index d829ee523..570541d7d 100644
--- a/v2v/input_libvirtxml.ml
+++ b/v2v/input_libvirtxml.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Parse_libvirt_xml
diff --git a/v2v/input_ova.ml b/v2v/input_ova.ml
index b509326dd..e8be68ed7 100644
--- a/v2v/input_ova.ml
+++ b/v2v/input_ova.ml
@@ -18,9 +18,10 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/input_vmx.ml b/v2v/input_vmx.ml
index c48a0155a..bb1650ae9 100644
--- a/v2v/input_vmx.ml
+++ b/v2v/input_vmx.ml
@@ -19,8 +19,9 @@
 open Printf
 open Scanf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/inspect_source.ml b/v2v/inspect_source.ml
index 7476c3d85..e5d1fd3aa 100644
--- a/v2v/inspect_source.ml
+++ b/v2v/inspect_source.ml
@@ -18,6 +18,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/v2v/linux.ml b/v2v/linux.ml
index 5f40c4196..799654511 100644
--- a/v2v/linux.ml
+++ b/v2v/linux.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/linux_bootloaders.ml b/v2v/linux_bootloaders.ml
index 33a6dc4e9..b5ad25508 100644
--- a/v2v/linux_bootloaders.ml
+++ b/v2v/linux_bootloaders.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/linux_kernels.ml b/v2v/linux_kernels.ml
index e8c3a93c6..6e1ca4bf1 100644
--- a/v2v/linux_kernels.ml
+++ b/v2v/linux_kernels.ml
@@ -20,8 +20,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 
diff --git a/v2v/modules_list.ml b/v2v/modules_list.ml
index 3ee0bd7dc..e3c6d5934 100644
--- a/v2v/modules_list.ml
+++ b/v2v/modules_list.ml
@@ -16,7 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_utils
+open Std_utils
 
 let input_modules = ref []
 and output_modules = ref []
diff --git a/v2v/output_glance.ml b/v2v/output_glance.ml
index 3feb2e493..e26bc0732 100644
--- a/v2v/output_glance.ml
+++ b/v2v/output_glance.ml
@@ -18,9 +18,10 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/output_libvirt.ml b/v2v/output_libvirt.ml
index b3e695387..61e1efddb 100644
--- a/v2v/output_libvirt.ml
+++ b/v2v/output_libvirt.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/output_local.ml b/v2v/output_local.ml
index 9c105ef8d..3553150ff 100644
--- a/v2v/output_local.ml
+++ b/v2v/output_local.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/output_null.ml b/v2v/output_null.ml
index b0e99b4de..9b31c2d00 100644
--- a/v2v/output_null.ml
+++ b/v2v/output_null.ml
@@ -18,9 +18,10 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/output_qemu.ml b/v2v/output_qemu.ml
index 031279cb3..00814e8f0 100644
--- a/v2v/output_qemu.ml
+++ b/v2v/output_qemu.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/output_rhv.ml b/v2v/output_rhv.ml
index 82e745a94..0c02df612 100644
--- a/v2v/output_rhv.ml
+++ b/v2v/output_rhv.ml
@@ -16,9 +16,10 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Unix
 open Printf
diff --git a/v2v/output_vdsm.ml b/v2v/output_vdsm.ml
index d8cd20156..361a8e555 100644
--- a/v2v/output_vdsm.ml
+++ b/v2v/output_vdsm.ml
@@ -16,8 +16,9 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Unix
 open Printf
diff --git a/v2v/parse_libvirt_xml.ml b/v2v/parse_libvirt_xml.ml
index 4ac9b51a5..56f9ea297 100644
--- a/v2v/parse_libvirt_xml.ml
+++ b/v2v/parse_libvirt_xml.ml
@@ -18,12 +18,13 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
-
-open Types
+open Common_gettext.Gettext
 open Xpath_helpers
 
+open Types
+
 type parsed_disk = {
   p_source_disk : source_disk;
   p_source : parsed_source;
diff --git a/v2v/parse_ovf_from_ova.ml b/v2v/parse_ovf_from_ova.ml
index 2a3752776..6dc032407 100644
--- a/v2v/parse_ovf_from_ova.ml
+++ b/v2v/parse_ovf_from_ova.ml
@@ -18,9 +18,10 @@
 
 (* Parse OVF from an externally produced OVA file. *)
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/parse_vmx.ml b/v2v/parse_vmx.ml
index 33ec17d3d..770dc29d3 100644
--- a/v2v/parse_vmx.ml
+++ b/v2v/parse_vmx.ml
@@ -18,6 +18,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/v2v/target_bus_assignment.ml b/v2v/target_bus_assignment.ml
index a9010c245..de6b0148d 100644
--- a/v2v/target_bus_assignment.ml
+++ b/v2v/target_bus_assignment.ml
@@ -16,6 +16,7 @@
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  *)
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/v2v/test-harness/Makefile.am b/v2v/test-harness/Makefile.am
index 9a548022a..bcfcdf21d 100644
--- a/v2v/test-harness/Makefile.am
+++ b/v2v/test-harness/Makefile.am
@@ -42,6 +42,7 @@ OCAMLPACKAGES = \
 	-I $(top_builddir)/lib/.libs \
 	-I $(top_builddir)/gnulib/lib/.libs \
 	-I $(top_builddir)/ocaml \
+	-I $(top_builddir)/common/mlstdutils \
 	-I $(top_builddir)/common/mlxml \
 	-I $(top_builddir)/mllib \
 	-I $(top_builddir)/v2v
@@ -129,7 +130,7 @@ depend: .depend
 
 .depend: $(wildcard $(abs_srcdir)/*.mli) $(wildcard $(abs_srcdir)/*.ml)
 	rm -f $@ $ -t
-	$(OCAMLFIND) ocamldep -I ../../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlxml -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize -I $(abs_top_builddir)/v2v $^ | \
+	$(OCAMLFIND) ocamldep -I ../../ocaml -I $(abs_srcdir) -I $(abs_top_builddir)/common/mlstdutils -I $(abs_top_builddir)/common/mlxml -I $(abs_top_builddir)/mllib -I $(abs_top_builddir)/customize -I $(abs_top_builddir)/v2v $^ | \
 	  $(SED) 's/ *$$//' | \
 	  $(SED) -e :a -e '/ *\\$$/N; s/ *\\\n */ /; ta' | \
 	  $(SED) -e 's,$(abs_srcdir)/,$(builddir)/,g' | \
diff --git a/v2v/test-harness/v2v_test_harness.ml b/v2v/test-harness/v2v_test_harness.ml
index 3c29a9430..ba8c5eeab 100644
--- a/v2v/test-harness/v2v_test_harness.ml
+++ b/v2v/test-harness/v2v_test_harness.ml
@@ -23,6 +23,7 @@ module D = Libvirt.Domain
 open Unix
 open Printf
 
+open Std_utils
 open Common_utils
 
 type test_plan = {
diff --git a/v2v/utils.ml b/v2v/utils.ml
index e0275db53..0dab5816e 100644
--- a/v2v/utils.ml
+++ b/v2v/utils.ml
@@ -20,8 +20,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 external drive_name : int -> string = "v2v_utils_drive_name"
 external drive_index : string -> int = "v2v_utils_drive_index"
diff --git a/v2v/v2v.ml b/v2v/v2v.ml
index 59f5ef17e..f1ce9335a 100644
--- a/v2v/v2v.ml
+++ b/v2v/v2v.ml
@@ -19,9 +19,10 @@
 open Unix
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
 open Unix_utils
+open Common_gettext.Gettext
 
 open Types
 open Utils
diff --git a/v2v/v2v_unit_tests.ml b/v2v/v2v_unit_tests.ml
index 7f98e09d3..be0bf0172 100644
--- a/v2v/v2v_unit_tests.ml
+++ b/v2v/v2v_unit_tests.ml
@@ -18,13 +18,15 @@
 
 (* This file tests individual virt-v2v functions. *)
 
-open OUnit2
-open Types
-
 open Printf
 
+open OUnit2
+
+open Std_utils
 open Common_utils
 
+open Types
+
 let inspect_defaults = {
   i_type = ""; i_distro = ""; i_arch = "";
   i_major_version = 0; i_minor_version = 0;
diff --git a/v2v/vCenter.ml b/v2v/vCenter.ml
index 468261d3d..d84bf8b58 100644
--- a/v2v/vCenter.ml
+++ b/v2v/vCenter.ml
@@ -18,6 +18,7 @@
 
 open Printf
 
+open Std_utils
 open Common_utils
 open Common_gettext.Gettext
 
diff --git a/v2v/windows_virtio.ml b/v2v/windows_virtio.ml
index 9891a770c..76af7ab2f 100644
--- a/v2v/windows_virtio.ml
+++ b/v2v/windows_virtio.ml
@@ -18,8 +18,9 @@
 
 open Printf
 
-open Common_gettext.Gettext
+open Std_utils
 open Common_utils
+open Common_gettext.Gettext
 
 open Regedit
 
-- 
2.13.0


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