Initial commit

29 files changed, 2071 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..b01e94c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+*.o
+*.lo
+/*.a.xyzzy
+/*.so.xyzzy
+/config.mak
+/src/include/skabus/config.h
+/skabus-*
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..2614d6f
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1,3 @@
+Main author:
+  Laurent Bercot <ska-skaware@skarnet.org>
+
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..9e2739b
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,13 @@
+Copyright (c) 2017 Laurent Bercot <ska-skaware@skarnet.org>
+
+Permission to use, copy, modify, and distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
+
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/INSTALL b/INSTALL
new file mode 100644
index 0000000..0fbb435
--- /dev/null
+++ b/INSTALL
@@ -0,0 +1,175 @@
+Build Instructions
+------------------
+
+* Requirements
+  ------------
+
+  - A POSIX-compliant C development environment
+  - GNU make version 3.81 or later
+  - skalibs version 2.6.1.0 or later: http://skarnet.org/software/skalibs/
+  - execline version 2.3.0.3 or later: http://skarnet.org/software/execline/
+  - s6 version 2.6.1.1 or later: http://skarnet.org/software/s6/
+
+ This software will run on any operating system that implements
+POSIX.1-2008, available at:
+  http://pubs.opengroup.org/onlinepubs/9699919799/
+
+
+* Standard usage
+  --------------
+
+  ./configure && make && sudo make install
+
+ will work for most users.
+ It will install the binaries in /bin and the static libraries in
+/usr/lib/skabus.
+
+ Please note that static libraries in /usr/lib/skabus *will not*
+be found by a default linker invocation: you need -L/usr/lib/skabus.
+Other skarnet.org software automatically handles that case if the
+default configuration is used, but if you change the configuration,
+remember to use the appropriate --with-lib configure option.
+
+ You can strip the binaries and libraries of their extra symbols via
+"make strip" before the "make install" phase. It will shave a few bytes
+off them.
+
+
+* Customization
+  -------------
+
+ You can customize paths via flags given to configure.
+ See ./configure --help for a list of all available configure options.
+
+
+* Environment variables
+  ---------------------
+
+ Controlling a build process via environment variables is a big and
+dangerous hammer. You should try and pass flags to configure instead;
+nevertheless, a few standard environment variables are recognized.
+
+ If the CC environment variable is set, its value will override compiler
+detection by configure. The --host=HOST option will still add a HOST-
+prefix to the value of CC.
+
+ The values of CFLAGS, CPPFLAGS and LDFLAGS will be appended to flags
+auto-detected by configure. To entirely override the flags set by
+configure instead, use make variables.
+
+
+* Make variables
+  --------------
+
+ You can invoke make with a few variables for more configuration.
+
+ CC, CFLAGS, CPPFLAGS, LDFLAGS, LDLIBS, AR, RANLIB, STRIP, INSTALL and
+CROSS_COMPILE can all be overridden on the make command line. This is
+an even bigger hammer than running ./configure with environment
+variables, so it is advised to only do this when it is the only way of
+obtaining the behaviour you want.
+
+ DESTDIR can be given on the "make install" command line in order to
+install to a staging directory.
+
+
+* Shared libraries
+  ----------------
+
+ Software from skarnet.org is small enough that shared libraries are
+generally not worth using. Static linking is simpler and incurs less
+runtime overhead and less points of failure: so by default, shared
+libraries are not built and binaries are linked against the static
+versions of the skarnet.org libraries. Nevertheless, you can:
+  * build shared libraries: --enable-shared
+  * link binaries against shared libraries: --disable-allstatic
+
+
+* Static binaries
+  ---------------
+
+ By default, binaries are linked against static versions of all the
+libraries they depend on, except for the libc. You can enforce
+linking against the static libc with --enable-static-libc.
+
+ (If you are using a GNU/Linux system, be aware that the GNU libc
+behaves badly with static linking and produces huge executables,
+which is why it is not the default. Other libcs are better suited
+to static linking, for instance musl: http://musl-libc.org/)
+
+
+* Cross-compilation
+  -----------------
+
+ skarnet.org packages centralize all the difficulty of
+cross-compilation in one place: skalibs. Once you have
+cross-compiled skalibs, the rest is easy.
+
+ * Use the --host=HOST option to configure, HOST being the triplet
+for your target.
+ * Make sure your cross-toolchain binaries (i.e. prefixed with HOST-)
+are accessible via your PATH environment variable.
+ * Make sure to use the correct version of skalibs for your target,
+and the correct sysdeps directory, making use of the
+--with-include, --with-lib, --with-dynlib and --with-sysdeps
+options as necessary.
+
+
+* The slashpackage convention
+  ---------------------------
+
+ The slashpackage convention (http://cr.yp.to/slashpackage.html)
+is a package installation scheme that provides a few guarantees
+over other conventions such as the FHS, for instance fixed
+absolute pathnames. skarnet.org packages support it: use the
+--enable-slashpackage option to configure, or
+--enable-slashpackage=DIR for a prefixed DIR/package tree.
+This option will activate slashpackage support during the build
+and set slashpackage-compatible installation directories.
+If $package_home is the home of the package, defined as
+DIR/package/$category/$package-$version with the variables
+read from the package/info file, then:
+
+  --dynlibdir is set to $package_home/library.so
+  --bindir is set to $package_home/command
+  --sbindir is also set to $package_home/command (slashpackage
+differentiates root-only binaries by their Unix rights, not their
+location in the filesystem)
+  --libexecdir is also set to $package_home/command (slashpackage
+does not need a specific directory for internal binaries)
+  --libdir is set to $package_home/library
+  --includedir is set to $package_home/include
+
+ --prefix is pretty much ignored when you use --enable-slashpackage.
+You should probably not use both --enable-slashpackage and --prefix.
+
+ When using slashpackage, two additional Makefile targets are
+available after "make install":
+ - "make update" changes the default version of the software to the
+freshly installed one. (This is useful when you have several installed
+versions of the same software, which slashpackage supports.)
+ - "make -L global-links" adds links from /command and /library.so to the
+default version of the binaries and shared libraries. The "-L" option to
+make is necessary because targets are symbolic links, and the default make
+behaviour is to check the pointed file's timestamp and not the symlink's
+timestamp.
+
+
+* Absolute pathnames
+  ------------------
+
+ You may want to use fixed absolute pathnames even if you're not
+following the slashpackage convention: for instance, the Nix packaging
+system prefers calling binaries with immutable paths rather than rely on
+PATH resolution. If you are in that case, use the --enable-absolute-paths
+option to configure. This will ensure that programs calling binaries from
+this package will call them with their full installation path (in bindir)
+without relying on a PATH search.
+
+
+* Out-of-tree builds
+  ------------------
+
+ skarnet.org packages do not support out-of-tree builds. They
+are small, so it does not cost much to duplicate the entire
+source tree if parallel builds are needed.
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..610dbb6
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,151 @@
+#
+# This Makefile requires GNU make.
+#
+# Do not make changes here.
+# Use the included .mak files.
+#
+
+it: all
+
+make_need := 3.81
+ifeq "" "$(strip $(filter $(make_need), $(firstword $(sort $(make_need) $(MAKE_VERSION)))))"
+fail := $(error Your make ($(MAKE_VERSION)) is too old. You need $(make_need) or newer)
+endif
+
+CC = $(error Please use ./configure first)
+
+STATIC_LIBS :=
+SHARED_LIBS :=
+INTERNAL_LIBS :=
+EXTRA_TARGETS :=
+LIB_DEFS :=
+
+define library_definition
+LIB$(firstword $(subst =, ,$(1))) := lib$(lastword $(subst =, ,$(1))).$(if $(DO_ALLSTATIC),a,so).xyzzy
+ifdef DO_SHARED
+SHARED_LIBS += lib$(lastword $(subst =, ,$(1))).so.xyzzy
+endif
+ifdef DO_STATIC
+STATIC_LIBS += lib$(lastword $(subst =, ,$(1))).a.xyzzy
+endif
+endef
+
+-include config.mak
+include package/targets.mak
+
+$(foreach var,$(LIB_DEFS),$(eval $(call library_definition,$(var))))
+
+include package/deps.mak
+
+version_m := $(basename $(version))
+version_M := $(basename $(version_m))
+version_l := $(basename $(version_M))
+CPPFLAGS_ALL := $(CPPFLAGS_AUTO) $(CPPFLAGS)
+CFLAGS_ALL := $(CFLAGS_AUTO) $(CFLAGS)
+ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)
+CFLAGS_SHARED := -fPIC
+else
+CFLAGS_SHARED :=
+endif
+LDFLAGS_ALL := $(LDFLAGS_AUTO) $(LDFLAGS)
+REALCC = $(CROSS_COMPILE)$(CC)
+AR := $(CROSS_COMPILE)ar
+RANLIB := $(CROSS_COMPILE)ranlib
+STRIP := $(CROSS_COMPILE)strip
+INSTALL := ./tools/install.sh
+
+ALL_BINS := $(LIBEXEC_TARGETS) $(BIN_TARGETS)
+ALL_LIBS := $(SHARED_LIBS) $(STATIC_LIBS) $(INTERNAL_LIBS)
+ALL_INCLUDES := $(wildcard src/include/$(package)/*.h)
+
+all: $(ALL_LIBS) $(ALL_BINS) $(ALL_INCLUDES)
+
+clean:
+	@exec rm -f $(ALL_LIBS) $(ALL_BINS) $(wildcard src/*/*.o src/*/*.lo) $(EXTRA_TARGETS)
+
+distclean: clean
+	@exec rm -f config.mak src/include/$(package)/config.h
+
+tgz: distclean
+	@. package/info && \
+	rm -rf /tmp/$$package-$$version && \
+	cp -a . /tmp/$$package-$$version && \
+	cd /tmp && \
+	tar -zpcv --owner=0 --group=0 --numeric-owner --exclude=.git* -f /tmp/$$package-$$version.tar.gz $$package-$$version && \
+	exec rm -rf /tmp/$$package-$$version
+
+strip: $(ALL_LIBS) $(ALL_BINS)
+ifneq ($(strip $(STATIC_LIBS)),)
+	exec $(STRIP) -x -R .note -R .comment -R .note.GNU-stack $(STATIC_LIBS)
+endif
+ifneq ($(strip $(ALL_BINS)$(SHARED_LIBS)),)
+	exec $(STRIP) -R .note -R .comment -R .note.GNU-stack $(ALL_BINS) $(SHARED_LIBS)
+endif
+
+install: install-dynlib install-libexec install-bin install-lib install-include
+install-dynlib: $(SHARED_LIBS:lib%.so.xyzzy=$(DESTDIR)$(dynlibdir)/lib%.so)
+install-libexec: $(LIBEXEC_TARGETS:%=$(DESTDIR)$(libexecdir)/%)
+install-bin: $(BIN_TARGETS:%=$(DESTDIR)$(bindir)/%)
+install-lib: $(STATIC_LIBS:lib%.a.xyzzy=$(DESTDIR)$(libdir)/lib%.a)
+install-include: $(ALL_INCLUDES:src/include/$(package)/%.h=$(DESTDIR)$(includedir)/$(package)/%.h)
+install-data: $(ALL_DATA:src/etc/%=$(DESTDIR)$(datadir)/%)
+
+ifneq ($(exthome),)
+
+$(DESTDIR)$(exthome): $(DESTDIR)$(home)
+	exec $(INSTALL) -l $(notdir $(home)) $(DESTDIR)$(exthome)
+
+update: $(DESTDIR)$(exthome)
+
+global-links: $(DESTDIR)$(exthome) $(SHARED_LIBS:lib%.so.xyzzy=$(DESTDIR)$(sproot)/library.so/lib%.so.$(version_M)) $(BIN_TARGETS:%=$(DESTDIR)$(sproot)/command/%)
+
+$(DESTDIR)$(sproot)/command/%: $(DESTDIR)$(home)/command/%
+	exec $(INSTALL) -D -l ..$(subst $(sproot),,$(exthome))/command/$(<F) $@
+
+$(DESTDIR)$(sproot)/library.so/lib%.so.$(version_M): $(DESTDIR)$(dynlibdir)/lib%.so.$(version_M)
+	exec $(INSTALL) -D -l ..$(subst $(sproot),,$(exthome))/library.so/$(<F) $@
+
+.PHONY: update global-links
+
+endif
+
+$(DESTDIR)$(datadir)/%: src/etc/%
+	exec $(INSTALL) -D -m 644 $< $@
+
+$(DESTDIR)$(dynlibdir)/lib%.so: lib%.so.xyzzy
+	$(INSTALL) -D -m 755 $< $@.$(version) && \
+	$(INSTALL) -l $(@F).$(version) $@.$(version_m) && \
+	$(INSTALL) -l $(@F).$(version_m) $@.$(version_M) && \
+	exec $(INSTALL) -l $(@F).$(version_M) $@
+
+$(DESTDIR)$(libexecdir)/% $(DESTDIR)$(bindir)/%: % package/modes
+	exec $(INSTALL) -D -m 600 $< $@
+	grep -- ^$(@F) < package/modes | { read name mode owner && \
+	if [ x$$owner != x ] ; then chown -- $$owner $@ ; fi && \
+	chmod $$mode $@ ; }
+
+$(DESTDIR)$(libdir)/lib%.a: lib%.a.xyzzy
+	exec $(INSTALL) -D -m 644 $< $@
+
+$(DESTDIR)$(includedir)/$(package)/%.h: src/include/$(package)/%.h
+	exec $(INSTALL) -D -m 644 $< $@
+
+%.o: %.c
+	exec $(REALCC) $(CPPFLAGS_ALL) $(CFLAGS_ALL) -c -o $@ $<
+
+%.lo: %.c
+	exec $(REALCC) $(CPPFLAGS_ALL) $(CFLAGS_ALL) $(CFLAGS_SHARED) -c -o $@ $<
+
+$(ALL_BINS):
+	exec $(REALCC) -o $@ $(CFLAGS_ALL) $(LDFLAGS_ALL) $(LDFLAGS_NOSHARED) $^ $(EXTRA_LIBS) $(LDLIBS)
+
+lib%.a.xyzzy:
+	exec $(AR) rc $@ $^
+	exec $(RANLIB) $@
+
+lib%.so.xyzzy:
+	exec $(REALCC) -o $@ $(CFLAGS_ALL) $(CFLAGS_SHARED) $(LDFLAGS_ALL) $(LDFLAGS_SHARED) -Wl,-soname,$(patsubst lib%.so.xyzzy,lib%.so.$(version_M),$@) $^ $(EXTRA_LIBS) $(LDLIBS)
+
+.PHONY: it all clean distclean tgz strip install install-dynlib install-bin install-lib install-include install-data
+
+.DELETE_ON_ERROR:
diff --git a/README b/README
new file mode 100644
index 0000000..e9bf523
--- /dev/null
+++ b/README
@@ -0,0 +1,27 @@
+skabus - a simpler Unix bus
+---------------------------
+
+ skabus is a suite of programs related to 1-to-many,
+many-to-1 or many-to-many interprocess communication on Unix.
+Ultimately, it will be a full implementation of a Unix bus,
+aiming for simplicity and maintainability.
+
+ For now, it is very much a work in progress, and it feels like
+a random collection of tools, even if it's not random.
+
+ See http://skarnet.org/software/skabus/ for details.
+
+
+* Installation
+  ------------
+
+ See the INSTALL file.
+
+
+* Contact information
+  -------------------
+
+ Laurent Bercot <ska-skaware at skarnet.org>
+
+ Please use the <skaware at list.skarnet.org> mailing-list for
+questions about skabus.
diff --git a/README.macosx b/README.macosx
new file mode 100644
index 0000000..d71a096
--- /dev/null
+++ b/README.macosx
@@ -0,0 +1,4 @@
+
+ This package will compile and run on Darwin (MacOS X), but the building of
+shared libraries is not supported.
+ Make sure you use the --disable-shared option to configure.
diff --git a/README.solaris b/README.solaris
new file mode 100644
index 0000000..91a5b26
--- /dev/null
+++ b/README.solaris
@@ -0,0 +1,12 @@
+
+ This package assumes the existence of a POSIX shell in /bin/sh.
+ On Solaris, /bin/sh is not POSIX. Most versions of Solaris provide
+a POSIX shell in /usr/xpg4/bin/sh.
+
+ To compile this package on Solaris, you will need to run
+
+     ./patch-for-solaris
+
+ before you run ./configure. This script will change the #! invocation
+of the configure script and various tools so that a POSIX shell is used
+for the compilation process.
diff --git a/configure b/configure
new file mode 100755
index 0000000..de87b55
--- /dev/null
+++ b/configure
@@ -0,0 +1,461 @@
+#!/bin/sh
+
+. package/info
+
+usage () {
+cat <<EOF
+Usage: $0 [OPTION]... [TARGET]
+
+Defaults for the options are specified in brackets.
+
+System types:
+  --target=TARGET               configure to run on target TARGET [detected]
+  --host=TARGET                 same as --target
+
+Installation directories:
+  --prefix=PREFIX               main installation prefix [/]
+  --exec-prefix=EPREFIX         installation prefix for executable files [PREFIX]
+
+Fine tuning of the installation directories:
+  --dynlibdir=DIR               shared library files [PREFIX/lib]
+  --bindir=BINDIR               user executables [EPREFIX/bin]
+  --libexecdir=DIR              package-scoped executables [EPREFIX/libexec]
+  --libdir=DIR                  static library files [PREFIX/lib/$package]
+  --includedir=DIR              C header files [PREFIX/include]
+
+ If no --prefix option is given, by default libdir (but not dynlibdir) will be
+ /usr/lib/$package, and includedir will be /usr/include.
+
+Dependencies:
+  --with-sysdeps=DIR            use sysdeps in DIR [PREFIX/lib/skalibs/sysdeps]
+  --with-include=DIR            add DIR to the list of searched directories for headers
+  --with-lib=DIR                add DIR to the list of searched directories for static libraries
+  --with-dynlib=DIR             add DIR to the list of searched directories for shared libraries
+
+ If no --prefix option is given, by default sysdeps will be fetched from
+ /usr/lib/skalibs/sysdeps.
+
+Optional features:
+  --enable-shared               build shared libraries [disabled]
+  --disable-static              do not build static libraries [enabled]
+  --disable-allstatic           do not prefer linking against static libraries [enabled]
+  --enable-static-libc          make entirely static binaries [disabled]
+  --enable-all-pic              build everything as PIC [enabled iff toolchain builds PIE]
+  --enable-slashpackage[=ROOT]  assume /package installation at ROOT [disabled]
+  --enable-absolute-paths       do not rely on PATH to access this package's binaries,
+                                  hardcode absolute BINDIR/foobar paths instead [disabled]
+
+EOF
+exit 0
+}
+
+# Helper functions
+
+# If your system does not have printf, you can comment this, but it is
+# generally not a good idea to use echo.
+# See http://www.etalabs.net/sh_tricks.html
+echo () {
+  IFS=" "
+  printf %s\\n "$*"
+}
+
+quote () {
+  tr '\n' ' ' <<EOF | grep '^[-[:alnum:]_=,./:]* $' >/dev/null 2>&1 && { echo "$1" ; return 0 ; }
+$1
+EOF
+  echo "$1" | sed -e "s/'/'\\\\''/g" -e "1s/^/'/" -e "\$s/\$/'/" -e "s#^'\([-[:alnum:]_,./:]*\)=\(.*\)\$#\1='\2#" -e "s|\*/|* /|g"
+}
+
+fail () {
+  echo "$*"
+  exit 1
+}
+
+fnmatch () {
+  eval "case \"\$2\" in $1) return 0 ;; *) return 1 ;; esac"
+}
+
+cmdexists () {
+  type "$1" >/dev/null 2>&1
+}
+
+trycc () {
+  test -z "$CC_AUTO" && cmdexists "$1" && CC_AUTO="$*"
+}
+
+stripdir () {
+  while eval "fnmatch '*/' \"\${$1}\"" ; do
+    eval "$1=\${$1%/}"
+  done
+}
+
+tryflag () {
+  echo "checking whether compiler accepts $2 ..."
+  echo "typedef int x;" > "$tmpc"
+  if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST "$2" -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+    echo "  ... yes"
+    eval "$1=\"\${$1} \$2\""
+    eval "$1=\${$1# }"
+    return 0
+  else
+    echo "  ... no"
+    return 1
+  fi
+}
+
+tryldflag () {
+  echo "checking whether linker accepts $2 ..."
+  echo "typedef int x;" > "$tmpc"
+  if $CC_AUTO $CFLAGS_AUTO $CFLAGS $CFLAGS_POST $LDFLAGS_AUTO $LDFLAGS $LDFLAGS_POST -nostdlib "$2" -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+    echo "  ... yes"
+    eval "$1=\"\${$1} \$2\""
+    eval "$1=\${$1# }"
+    return 0
+  else
+    echo "  ... no"
+    return 1
+  fi
+}
+
+
+# Actual script
+
+CC_AUTO=
+CPPFLAGS_AUTO="-D_POSIX_C_SOURCE=200809L -D_XOPEN_SOURCE=700 -iquote src/include-local -Isrc/include"
+CPPFLAGS_POST="$CPPFLAGS"
+CPPFLAGS=
+CFLAGS_AUTO="-pipe -Wall"
+CFLAGS_POST="$CFLAGS"
+CFLAGS=-O2
+LDFLAGS_AUTO=
+LDFLAGS_POST="$LDFLAGS"
+LDFLAGS=
+LDFLAGS_NOSHARED=
+LDFLAGS_SHARED=-shared
+prefix=
+exec_prefix='$prefix'
+dynlibdir='$prefix/lib'
+libexecdir='$exec_prefix/libexec'
+bindir='$exec_prefix/bin'
+libdir='$prefix/lib/$package'
+includedir='$prefix/include'
+sysdeps='$prefix/lib/skalibs/sysdeps'
+manualsysdeps=false
+shared=false
+static=true
+allpic=detect
+slashpackage=false
+abspath=false
+sproot=
+home=
+exthome=
+allstatic=true
+evenmorestatic=false
+addincpath=''
+addlibspath=''
+addlibdpath=''
+vpaths=''
+vpathd=''
+build=
+
+for arg ; do
+  case "$arg" in
+    --help) usage ;;
+    --prefix=*) prefix=${arg#*=} ;;
+    --exec-prefix=*) exec_prefix=${arg#*=} ;;
+    --dynlibdir=*) dynlibdir=${arg#*=} ;;
+    --libexecdir=*) libexecdir=${arg#*=} ;;
+    --bindir=*) bindir=${arg#*=} ;;
+    --libdir=*) libdir=${arg#*=} ;;
+    --includedir=*) includedir=${arg#*=} ;;
+    --with-sysdeps=*) sysdeps=${arg#*=} manualsysdeps=true ;;
+    --with-include=*) var=${arg#*=} ; stripdir var ; addincpath="$addincpath -I$var" ;;
+    --with-lib=*) var=${arg#*=} ; stripdir var ; addlibspath="$addlibspath -L$var" ; vpaths="$vpaths $var" ;;
+    --with-dynlib=*) var=${arg#*=} ; stripdir var ; addlibdpath="$addlibdpath -L$var" ; vpathd="$vpathd $var" ;;
+    --enable-shared|--enable-shared=yes) shared=true ;;
+    --disable-shared|--enable-shared=no) shared=false ;;
+    --enable-static|--enable-static=yes) static=true ;;
+    --disable-static|--enable-static=no) static=false ;;
+    --enable-allstatic|--enable-allstatic=yes) allstatic=true ;;
+    --disable-allstatic|--enable-allstatic=no) allstatic=false ; evenmorestatic=false ;;
+    --enable-static-libc|--enable-static-libc=yes) allstatic=true ; evenmorestatic=true ;;
+    --disable-static-libc|--enable-static-libc=no) evenmorestatic=false ;;
+    --enable-all-pic|--enable-all-pic=yes) allpic=true ;;
+    --disable-all-pic|--enable-all-pic=no) allpic=false ;;
+    --enable-slashpackage=*) sproot=${arg#*=} ; slashpackage=true ; ;;
+    --enable-slashpackage) sproot= ; slashpackage=true ;;
+    --disable-slashpackage) sproot= ; slashpackage=false ;;
+    --enable-absolute-paths|--enable-absolute-paths=yes) abspath=true ;;
+    --disable-absolute-paths|--enable-absolute-paths=no) abspath=false ;;
+    --enable-*|--disable-*|--with-*|--without-*|--*dir=*) ;;
+    --host=*|--target=*) target=${arg#*=} ;;
+    --build=*) build=${arg#*=} ;;
+    -* ) echo "$0: unknown option $arg" ;;
+    *=*) ;;
+    *) target=$arg ;;
+  esac
+done
+
+# Add /usr in the default default case
+if test -z "$prefix" ; then
+  if test "$libdir" = '$prefix/lib/$package' ; then
+    libdir=/usr/lib/$package
+  fi
+  if test "$includedir" = '$prefix/include' ; then
+    includedir=/usr/include
+  fi
+  if test "$sysdeps" = '$prefix/lib/skalibs/sysdeps' ; then
+    sysdeps=/usr/lib/skalibs/sysdeps
+  fi
+fi
+
+# Expand installation directories
+stripdir prefix
+for i in exec_prefix dynlibdir libexecdir bindir libdir includedir sysdeps sproot ; do
+  eval tmp=\${$i}
+  eval $i=$tmp
+  stripdir $i
+done
+
+# Get usable temp filenames
+i=0
+set -C
+while : ; do
+  i=$(($i+1))
+  tmpc="./tmp-configure-$$-$PPID-$i.c"
+  tmpe="./tmp-configure-$$-$PPID-$i.tmp"
+  2>|/dev/null > "$tmpc" && break
+  2>|/dev/null > "$tmpe" && break
+  test "$i" -gt 50 && fail "$0: cannot create temporary files"
+done
+set +C
+trap 'rm -f "$tmpc" "$tmpe"' EXIT ABRT INT QUIT TERM HUP
+
+# Set slashpackage values
+if $slashpackage ; then
+  home=${sproot}/package/${category}/${package}-${version}
+  exthome=${sproot}/package/${category}/${package}
+  if $manualsysdeps ; then
+    :
+  else
+    sysdeps=${sproot}/package/prog/skalibs/sysdeps
+  fi
+  extbinprefix=${exthome}/command
+  dynlibdir=${home}/library.so
+  bindir=${home}/command
+  libdir=${home}/library
+  libexecdir=$bindir
+  includedir=${home}/include
+  while read dep ; do
+    addincpath="$addincpath -I${sproot}${dep}/include"
+    vpaths="$vpaths ${sproot}${dep}/library"
+    addlibspath="$addlibspath -L${sproot}${dep}/library"
+    vpathd="$vpathd ${sproot}${dep}/library.so"
+    addlibdpath="$addlibdpath -L${sproot}${dep}/library.so"
+  done < package/deps-build
+fi
+
+# Find a C compiler to use
+if test -n "$target" && test x${build} != x${target} ; then
+  cross=${target}-
+else
+  cross=
+fi
+echo "checking for C compiler..."
+trycc ${cross}${CC}
+trycc ${cross}gcc
+trycc ${cross}clang
+trycc ${cross}cc
+test -n "$CC_AUTO" || { echo "$0: cannot find a C compiler" ; exit 1 ; }
+echo "  ... $CC_AUTO"
+echo "checking whether C compiler works... "
+echo "typedef int x;" > "$tmpc"
+if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST -c -o /dev/null "$tmpc" 2>"$tmpe" ; then
+  echo "  ... yes"
+else
+  echo "  ... no. Compiler output follows:"
+  cat < "$tmpe"
+  exit 1
+fi
+
+echo "checking target system type..."
+if test -z "$target" ; then
+  if test -n "$build" ; then
+    target=$build ;
+  else
+    target=$($CC_AUTO -dumpmachine 2>/dev/null) || target=unknown
+  fi
+fi
+echo "  ... $target"
+if test ! -d $sysdeps || test ! -f $sysdeps/target ; then
+  echo "$0: error: $sysdeps is not a valid sysdeps directory"
+  exit 1
+fi
+if [ "x$target" != "x$(cat $sysdeps/target)" ] ; then
+  echo "$0: error: target $target does not match the contents of $sysdeps/target"
+  exit 1
+fi
+
+if test $allpic = detect ; then
+  echo "Checking whether we need to build everything as PIC..."
+  if $CC_AUTO $CPPFLAGS_AUTO $CPPFLAGS $CPPFLAGS_POST $CFLAGS_AUTO $CFLAGS $CFLAGS_POST -dM -E - < /dev/null | grep -qF __PIE__ ; then
+    allpic=true
+    echo "  ... yes"
+  else
+    allpic=false
+    echo "  ... no"
+  fi
+fi
+if $allpic ; then
+  tryflag CFLAGS_AUTO -fPIC
+fi
+
+spawn_lib=$(cat $sysdeps/spawn.lib)
+socket_lib=$(cat $sysdeps/socket.lib)
+sysclock_lib=$(cat $sysdeps/sysclock.lib)
+tainnow_lib=$(cat $sysdeps/tainnow.lib)
+timer_lib=$(cat $sysdeps/timer.lib)
+util_lib=$(cat $sysdeps/util.lib)
+
+tryflag CFLAGS_AUTO -std=c99
+tryflag CFLAGS -fomit-frame-pointer
+tryflag CFLAGS_AUTO -fno-exceptions
+tryflag CFLAGS_AUTO -fno-unwind-tables
+tryflag CFLAGS_AUTO -fno-asynchronous-unwind-tables
+tryflag CFLAGS_AUTO -Wa,--noexecstack
+tryflag CFLAGS -fno-stack-protector
+tryflag CPPFLAGS_AUTO -Werror=implicit-function-declaration
+tryflag CPPFLAGS_AUTO -Werror=implicit-int
+tryflag CPPFLAGS_AUTO -Werror=pointer-sign
+tryflag CPPFLAGS_AUTO -Werror=pointer-arith
+tryflag CFLAGS_AUTO -ffunction-sections
+tryflag CFLAGS_AUTO -fdata-sections
+
+tryldflag LDFLAGS_AUTO -Wl,--sort-section=alignment
+tryldflag LDFLAGS_AUTO -Wl,--sort-common
+
+CPPFLAGS_AUTO="${CPPFLAGS_AUTO}${addincpath}"
+
+if $evenmorestatic ; then
+  LDFLAGS_NOSHARED=-static
+fi
+
+if $shared ; then
+  tryldflag LDFLAGS -Wl,--hash-style=both
+fi
+
+LDFLAGS_SHARED="${LDFLAGS_SHARED}${addlibdpath}"
+
+if $allstatic ; then
+  LDFLAGS_NOSHARED="${LDFLAGS_NOSHARED}${addlibspath}"
+  tryldflag LDFLAGS_NOSHARED -Wl,--gc-sections
+else
+  LDFLAGS_NOSHARED="${LDFLAGS_NOSHARED}${addlibdpath}"
+fi
+
+if test -z "$vpaths" ; then
+  while read dep ; do
+    base=$(basename $dep) ;
+    vpaths="$vpaths /usr/lib/$base"
+    addlibspath="$addlibspath -L/usr/lib/$base"
+  done < package/deps-build  
+fi
+
+echo "creating config.mak..."
+cmdline=$(quote "$0")
+for i ; do cmdline="$cmdline $(quote "$i")" ; done
+exec 3>&1 1>config.mak
+cat << EOF
+# This file was generated by:
+# $cmdline
+# Any changes made here will be lost if configure is re-run.
+
+target := $target
+package := $package
+prefix := $prefix
+exec_prefix := $exec_prefix
+dynlibdir := $dynlibdir
+libexecdir := $libexecdir
+bindir := $bindir
+libdir := $libdir
+includedir := $includedir
+sysdeps := $sysdeps
+slashpackage := $slashpackage
+sproot := $sproot
+version := $version
+home := $home
+exthome := $exthome
+SPAWN_LIB := ${spawn_lib}
+SOCKET_LIB := ${socket_lib}
+SYSCLOCK_LIB := ${sysclock_lib}
+TAINNOW_LIB := ${tainnow_lib}
+TIMER_LIB := ${timer_lib}
+UTIL_LIB := ${util_lib}
+
+CC := ${CC_AUTO##${cross}}
+CPPFLAGS_AUTO := $CPPFLAGS_AUTO
+CPPFLAGS := $CPPFLAGS $CPPFLAGS_POST
+CFLAGS_AUTO := $CFLAGS_AUTO
+CFLAGS := $CFLAGS $CFLAGS_POST
+LDFLAGS_AUTO := $LDFLAGS_AUTO
+LDFLAGS := $LDFLAGS $LDFLAGS_POST
+LDFLAGS_SHARED := $LDFLAGS_SHARED
+LDFLAGS_NOSHARED := $LDFLAGS_NOSHARED
+CROSS_COMPILE := $cross
+
+vpath lib%.a$vpaths
+vpath lib%.so$vpathd
+EOF
+if $allstatic ; then
+  echo ".LIBPATTERNS := lib%.a"
+  echo "DO_ALLSTATIC := 1"
+else
+  echo ".LIBPATTERNS := lib%.so"
+fi
+if $static ; then
+  echo "DO_STATIC := 1"
+else
+  echo "DO_STATIC :="
+fi
+if $shared ; then
+  echo "DO_SHARED := 1"
+else
+  echo "DO_SHARED :="
+fi
+if $allpic ; then
+  echo "STATIC_LIBS_ARE_PIC := 1"
+else
+  echo "STATIC_LIBS_ARE_PIC :="
+fi
+
+exec 1>&3 3>&-
+echo "  ... done."
+
+echo "creating src/include/${package}/config.h..."
+mkdir -p -m 0755 src/include/${package}
+exec 3>&1 1> src/include/${package}/config.h
+cat <<EOF
+/* ISC license. */
+
+/* Generated by: $cmdline */
+
+#ifndef ${package_macro_name}_CONFIG_H
+#define ${package_macro_name}_CONFIG_H
+
+#define ${package_macro_name}_VERSION "$version"
+EOF
+if $slashpackage ; then
+  echo "#define ${package_macro_name}_BINPREFIX \"$bindir/\""
+  echo "#define ${package_macro_name}_EXTBINPREFIX \"$extbinprefix/\""
+elif $abspath ; then
+  echo "#define ${package_macro_name}_BINPREFIX \"$bindir/\""
+  echo "#define ${package_macro_name}_EXTBINPREFIX \"$bindir/\""
+else
+  echo "#define ${package_macro_name}_BINPREFIX \"\""
+  echo "#define ${package_macro_name}_EXTBINPREFIX \"\""
+fi
+echo "#define ${package_macro_name}_LIBEXECPREFIX \"$libexecdir/\""
+echo
+echo "#endif"
+exec 1>&3 3>&-
+echo "  ... done."
diff --git a/doc/index.html b/doc/index.html
new file mode 100644
index 0000000..140f1e5
--- /dev/null
+++ b/doc/index.html
@@ -0,0 +1,134 @@
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <meta http-equiv="Content-Language" content="en" />
+    <title>skabus - a Unix bus system</title>
+    <meta name="Description" content="skabus - a Unix bus system" />
+    <meta name="Keywords" content="skabus bus unix linux laurent bercot ska skarnet dbus ubus" />
+    <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> -->
+  </head>
+<body>
+
+<p>
+<a href="//skarnet.org/software/">Software</a><br />
+<a href="//skarnet.org/">skarnet.org</a>
+</p>
+
+<h1> skabus </h1>
+
+<h2> What is it&nbsp;? </h2>
+
+<p>
+ skabus is a suite of programs and libraries for Unix systems
+that aim to implement a bus, i.e. a many-to-many interprocess
+communication mechanism.
+</p>
+
+<p>
+ It is very much a work in progress, and won't be complete for a long time.
+For now, it looks like a random collection of tools, even though there is
+a consistent vision behind them.
+</p>
+
+<hr />
+
+<!--
+<ul>
+ <li> <a href="why.html">Why skabus&nbsp;?</a> Why not just use D-Bus&nbsp;?</li> -->
+ <li> <a href="overview.html">An overview of skabus</a> </li>
+</ul>
+
+<hr />
+-->
+
+<h2> Installation </h2>
+
+<h3> Requirements </h3>
+
+<ul>
+ <li> A POSIX-compliant system with a standard C development environment </li>
+ <li> GNU make, version 3.81 or later </li>
+ <li> <a href="//skarnet.org/software/skalibs/">skalibs</a> version
+2.6.1.0 or later </li>
+ <li> <a href="//skarnet.org/software/execline/">execline</a> version
+2.3.0.3 or later </li>
+ <li> <a href="//skarnet.org/software/s6/">s6</a> version
+2.6.1.1 or later </li>
+
+</ul>
+
+<h3> Licensing </h3>
+
+<p>
+ skabus is free software. It is available under the
+<a href="http://opensource.org/licenses/ISC">ISC license</a>.
+</p>
+
+<h3> Download </h3>
+
+<ul>
+ <li> The current released version of skabus is <a href="skabus-0.0.1.0.tar.gz">0.0.1.0</a>. </li>
+ <li> Alternatively, you can checkout a copy of the skabus git repository:
+<pre> git clone git://git.skarnet.org/skabus </pre> </li>
+</ul>
+
+<h3> Compilation </h3>
+
+<ul>
+ <li> See the enclosed INSTALL file for installation details. </li>
+</ul>
+
+<h3> Upgrade notes </h3>
+
+<ul>
+ <li> <a href="upgrade.html">This page</a> lists the differences to be aware of between
+the previous versions of skabus and the current one. </li>
+</ul>
+
+<hr />
+
+<h2> Reference </h2>
+
+<h3> Commands </h3>
+
+<p>
+ All these commands exit 111 if they encounter a temporary error or
+hardware error, and
+100 if they encounter a permanent error - such as a misuse. Short-lived
+commands exit 0 on success. Other exit codes are documented in the
+relevant page.
+</p>
+
+<h4> Publication/subscription </h4>
+
+<ul>
+ <li> The <a href="skabus-dyntee.html">skabus-dyntee</a> program </li>
+ <li> The <a href="skabus-dynteed.html">skabus-dynteed</a> program </li>
+ <li> The <a href="skabus-dyntee-client.html">skabus-dyntee-client</a> program </li>
+</ul>
+
+<hr />
+
+<a name="related">
+<h2> Related resources </h2>
+</a>
+
+<h3> skabus discussion </h3>
+
+<ul>
+ <li> <tt>skabus</tt> is discussed on the
+<a href="//skarnet.org/lists.html#skaware">skaware</a> mailing-list. </li>
+</ul>
+
+<h3> Similar work </h3>
+
+<ul>
+ <li> <a href="http://www.freedesktop.org/wiki/Software/dbus/">D-Bus</a> is
+the most widely used Linux bus. It's also a horrible, inefficient mess. </li>
+ <li> <a href="http://wiki.openwrt.org/doc/techref/ubus">ubus</a> is
+OpenWrt's micro-bus architecture. </li>
+</ul>
+
+</body>
+</html>
diff --git a/doc/skabus-dyntee-client.html b/doc/skabus-dyntee-client.html
new file mode 100644
index 0000000..1f54a8b
--- /dev/null
+++ b/doc/skabus-dyntee-client.html
@@ -0,0 +1,57 @@
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <meta http-equiv="Content-Language" content="en" />
+    <title>skabus: the skabus-dyntee-client program</title>
+    <meta name="Description" content="skabus: the skabus-dyntee-client program" />
+    <meta name="Keywords" content="skabus dynamic tee dyntee skabus-dyntee-client unix linux socket pubsub client" />
+    <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> -->
+  </head>
+<body>
+
+<p>
+<a href="index.html">skabus</a><br />
+<a href="//skarnet.org/software/">Software</a><br />
+<a href="//skarnet.org/">skarnet.org</a>
+</p>
+
+<h1> The <tt>skabus-dyntee-client</tt> program </h1>
+
+<p>
+<tt>skabus-dyntee-client</tt> is a client for the
+<a href="skabus-dyntee.html">skabus-dyntee</a> server.
+It connects to a Unix domain socket where a
+<a href="skabus-dyntee.html">skabus-dyntee</a> instance is listening,
+then executes into a program with the data stream from skabus-dyntee
+on its standard input.
+</p>
+
+<h2> Interface </h2>
+
+<pre>
+     skabus-dyntee-client <em>path</em> <em>prog...</em>
+</pre>
+
+<ul>
+ <li> skabus-dyntee-client connects to the Unix domain socket at <em>path</em>.
+It assumes the other end of the socket is a <a href="skabus-dyntee.html">skabus-dyntee</a>
+(or <a href="skabus-dynteed.html">skabus-dynteed</a>, which is the same) instance. </li>
+ <li> It executes into the <em>prog...</em> command line with the
+socket as <em>prog</em>'s standard input. </li>
+</ul>
+
+<h2> Notes </h2>
+
+<ul>
+ <li> It is possible for <em>prog</em> to immediately get EOF on its
+standard input. This likely means that the server has denied the
+connection (skabus-dyntee-client did not run with an authorized uid
+or gid). But it could also mean that the stream ended right after
+the client connected. </li>
+ <li> The socket is shut down for writing, so <em>prog</em> can
+only read on its stdin; attempts to write will always fail. </li>
+</ul>
+
+</body>
+</html>
diff --git a/doc/skabus-dyntee.html b/doc/skabus-dyntee.html
new file mode 100644
index 0000000..57b34f3
--- /dev/null
+++ b/doc/skabus-dyntee.html
@@ -0,0 +1,123 @@
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <meta http-equiv="Content-Language" content="en" />
+    <title>skabus: the skabus-dyntee program</title>
+    <meta name="Description" content="skabus: the skabus-dyntee program" />
+    <meta name="Keywords" content="skabus dynamic tee dyntee skabus-dyntee unix linux socket pubsub server daemon" />
+    <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> -->
+  </head>
+<body>
+
+<p>
+<a href="index.html">skabus</a><br />
+<a href="//skarnet.org/software/">Software</a><br />
+<a href="//skarnet.org/">skarnet.org</a>
+</p>
+
+<h1> The <tt>skabus-dyntee</tt> program </h1>
+
+<p>
+<tt>skabus-dyntee</tt> is a <em>dynamic tee</em>, which is the
+simplest publisher daemon possible.
+It listens on a Unix domain socket, accepts client connections, and
+publishes to its clients everything it reads on its standard
+input, as a byte stream. It only writes to clients and never reads
+from them.
+</p>
+
+<h2> Interface </h2>
+
+<pre>
+     skabus-dyntee [ -1 ] [ -D | -d ] [ -c <em>maxconn</em> ] [ -b <em>backlog</em> ] [ -G <em>gidlist</em> ] [ -g <em>gid</em> ] [ -u <em>uid</em> ] [ -U ] [ -t <em>clienttimeout</em> ] [ -T <em>lameducktimeout</em> ] [ -i <em>rulesdir</em> | -x <em>rulesfile</em> ] <em>path</em>
+</pre>
+
+<ul>
+ <li> skabus-dyntee binds to the Unix domain socket at <em>path</em>. </li>
+ <li> If applicable, it drops root privileges. </li>
+ <li> It listens to its socket and accepts client connections. </li>
+ <li> Whenever it has data available on its standard input, it reads
+that data and writes it to every client it has. It duplicates its
+stdin stream to all its clients, hence the name <em>dynamic tee</em>. </li>
+ <li> When it reads EOF on its stdin, or when it receives a SIGTERM,
+it waits for its clients to read their pending data, then exits 0. </li>
+</ul>
+
+<p>
+ skabus-dyntee is just a wrapper that binds to its socket and
+drops privileges before executing into
+<a href="skabus-dynteed.html">skabus-dynteed</a>. For details of
+the daemon's operation, see the
+<a href="skabus-dynteed.html">skabus-dynteed</a> documentation.
+</p>
+
+<h2> Options </h2>
+
+<ul>
+ <li> <tt>-1</tt>&nbsp;: write a newline to stdout, before
+closing it, right after binding and listening to the Unix socket.
+If stdout is suitably redirected, this can be used by monitoring
+programs to check when the server is ready to accept connections. </li>
+ <li> <tt>-d</tt>&nbsp;: allow instant rebinding to the same path
+even if it has been used not long ago - this is the SO_REUSEADDR flag to
+<a href="http://pubs.opengroup.org/onlinepubs/9699919799/functions/setsockopt.html">setsockopt()</a>
+and is generally used with server programs. This is the default. Note that
+<em>path</em> will be deleted if it already exists at program start time. </li>
+ <li> <tt>-D</tt>&nbsp;: disallow instant rebinding to the same path. </li>
+ <li> <tt>-c&nbsp;<em>maxconn</em></tt>&nbsp;: accept at most
+<em>maxconn</em> concurrent client connections. Default is 40. It is
+impossible to set it higher than the value of the SKABUS_DYNTEE_MAX macro,
+which is 1000.
+ <li> <tt>-b&nbsp;<em>backlog</em></tt>&nbsp;: set a maximum of
+<em>backlog</em> backlog connections on the socket. Extra
+connection attempts will rejected by the kernel. </li>
+ <li> <tt>-G&nbsp;<em>gidlist</em></tt>&nbsp;: change skabus-dyntee's
+supplementary group list to <em>gidlist</em> after binding the socket.
+This is only valid when run as root. <em>gidlist</em> must be a
+comma-separated list of numerical group IDs. </li>
+ <li> <tt>-g&nbsp;<em>gid</em></tt>&nbsp;: change skabus-dyntee's groupid
+to <em>gid</em> after binding the socket. This is only valid when run
+as root. </li>
+ <li> <tt>-u&nbsp;<em>uid</em></tt>&nbsp;: change skabus-dyntee's userid
+to <em>uid</em> after binding the socket. This is only valid when run
+as root. </li>
+ <li> <tt>-U</tt>&nbsp;: change skabus-dyntee's user id, group id and
+supplementary group list
+according to the values of the UID, GID and GIDLIST environment variables
+after binding the socket. This is only valid when run as root.
+This can be used with the
+<a href="s6-envuidgid.html">s6-envuidgid</a>
+program to easily script a service that binds to a privileged socket
+then drops its privileges to those of a named non-root account. </li>
+ <li> <tt>-t&nbsp;<em>clienttimeout</em></tt>&nbsp;: disconnect a client
+that has not read its data after <em>clienttimeout</em> milliseconds.
+By default, <em>clienttimeout</em> is 0, which means infinite. </li>
+ <li> <tt>-T&nbsp;<em>lameducktimeout</em></tt>&nbsp;: after
+skabus-dyntee has been told to exit, clients will have
+<em>lameducktimeout</em> milliseconds to read their pending data,
+after which skabus-dyntee will exit anyway.
+By default, <em>lameducktimeout</em> is 0, which means infinite. </li>
+ <li> <tt>-x&nbsp;<em>rulesfile</em></tt>&nbsp;: read access rights
+configuration from CDB file <em>rulesfile</em>. </li>
+ <li> <tt>-i&nbsp;<em>rulesdir</em></tt>&nbsp;: read access rights
+configuration from the filesystem in directory <em>rulesdir</em>. </li>
+</ul>
+
+<h2> Notes </h2>
+
+<ul>
+ <li> skabus-dyntee does not interpret its options itself. It just
+dispatches them to the appropriate program on the command line that
+it builds. </li>
+ <li> From the user's point of view, skabus-dyntee behaves like a
+long-lived process, even if the long-lived process itself is called
+<a href="skabus-dynteed.html">skabus-dynteed</a>. Every operational detail
+of skabus-dynteed applies to skabus-dyntee as well; in particular,
+make sure to properly
+<a href="skabus-dynteed.html#configuration">configure the clients'
+access rights</a>. </li>
+</ul>
+
+</body>
+</html>
diff --git a/doc/skabus-dynteed.html b/doc/skabus-dynteed.html
new file mode 100644
index 0000000..7573f3b
--- /dev/null
+++ b/doc/skabus-dynteed.html
@@ -0,0 +1,154 @@
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <meta http-equiv="Content-Language" content="en" />
+    <title>skabus: the skabus-dynteed program</title>
+    <meta name="Description" content="skabus: the skabus-dynteed program" />
+    <meta name="Keywords" content="skabus skabus-dynteed publisher dynamic tee daemon publication unix linux server daemon" />
+    <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> -->
+  </head>
+<body>
+
+<p>
+<a href="index.html">skabus</a><br />
+<a href="//skarnet.org/software/">Software</a><br />
+<a href="//skarnet.org/">skarnet.org</a>
+</p>
+
+<h1> The <tt>skabus-dynteed</tt> program </h1>
+
+<p>
+<tt>skabus-dynteed</tt> is the serving part of the
+<a href="skabus-dyntee.html">skabus-dyntee</a> program.
+It assumes that one of its file descriptors (3 or above) is a
+bound, listening, non-blocking domain socket;
+it accepts connections from clients connecting to that socket,
+and copies its stdin stream to all its clients.
+</p>
+
+<h2> Interface </h2>
+
+<pre>
+     skabus-dynteed [ -1 ] [ -c <em>maxconn</em> ] [ -t <em>clienttimeout</em> ] [ -T <em>lameducktimeout</em> ] [ -i <em>rulesdir</em> | -x <em>rulesfile</em> ]
+</pre>
+
+<ul>
+ <li> skabus-dynteed accepts connections from clients to an already
+bound and listening SOCK_STREAM Unix domain socket, by default on
+its file descriptor 3. </li>
+ <li> It runs until it receives a SIGTERM or until it reads EOF
+on its stdin. In that case, it stops accepting new client connections,
+and exits 0 when all clients have read their pending data. </li>
+ <li> Client connections last as long as the client wants to, unless an
+error occurs, or unless the server is told to exit - in which cases
+skabus-dynteed forcibly disconnects the client. </li>
+ <li> Clients cannot write anything to skabus-dynteed. They can only
+read a stream of bytes on their socket, which is a copy of what
+skabus-dynteed reads on its standard input. </li>
+</ul>
+
+<h2> Options </h2>
+
+<ul>
+ <li> <tt>-1</tt>&nbsp;: write a newline to stdout, and close stdout,
+right before entering the client-accepting loop.
+If stdout is suitably redirected, this can be used by monitoring
+programs to check when the server is accepting connections. See
+<a href="//skarnet.org/software/s6/notifywhenup.html">this page</a>
+for more information on readiness notification. </li>
+ <li> <tt>-c&nbsp;<em>maxconn</em></tt>&nbsp;: accept at most
+<em>maxconn</em> concurrent connections. Default is 40. It is
+impossible to set it higher than the value of the SKABUS_DYNTEE_MAX macro,
+i.e. 1000. </li>
+ <li> <tt>-t&nbsp;<em>clienttimeout</em></tt>&nbsp;: disconnect a client
+if it has not read its pending data after <em>clienttimeout</em> milliseconds.
+By default, <em>clienttimeout</em> is 0, which means infinite. </li>
+ <li> <tt>-T&nbsp;<em>lameducktimeout</em></tt>&nbsp;: give clients
+<em>lameducktimeout</em> milliseconds to read their pending data when
+skabus-dynteed is going to exit.
+By default, <em>lameducktimeout</em> is 0, which means infinite. </li>
+ <li> <tt>-x&nbsp;<em>rulesfile</em></tt>&nbsp;: read access rights
+configuration from
+<a href="http://en.wikipedia.org/wiki/Cdb_%28software%29">CDB</a>
+file <em>rulesfile</em>. </li>
+ <li> <tt>-i&nbsp;<em>rulesdir</em></tt>&nbsp;: read access rights
+configuration from the filesystem in directory <em>rulesdir</em>. </li>
+</ul>
+
+<h2> Signals </h2>
+
+<ul>
+ <li> SIGTERM: enter lameduck mode, then exit when all clients have
+read their pending data (or <em>lameducktimeout</em> milliseconds have
+elapsed). </li>
+ <li> SIGHUP: reopen <em>rulesfile</em>, if skabus-dynteed has been run
+with the <tt>-x</tt> option. It is not necessary to send skabus-dynteed
+a SIGHUP when the <tt>-i</tt> option is used instead: configuration
+changes in the filesystem are automatically picked up. </li>
+</ul>
+
+<a name="configuration">
+<h2> Configuration </h2>
+</a>
+
+<p>
+skabus-dynteed (or its wrapper <a href="skabus-dyntee.html">skabus-dyntee</a>)
+can be instructed not to accept every client. This is achieved
+via a series of rules, or <em>ruleset</em>, stored in either a
+<em>rulesfile</em> in the
+<a href="http://en.wikipedia.org/wiki/Cdb_%28software%29">CDB</a> format,
+and given to skabus-dynteed with the <tt>-x</tt> option,
+or in a <em>rulesdir</em>, i.e. a directory in the filesystem following a
+certain format, and given to skabus-dynteed with the <tt>-i</tt> option.
+If neither the <tt>-i</tt> nor the <tt>-x</tt> option has been provided,
+skabus-dynteed will accept connections from any client.
+</p>
+
+<p>
+ Rulesets can be converted between the <em>rulesdir</em> and
+<em>rulesfile</em> formats with the
+<a href="s6-accessrules-cdb-from-fs.html">s6-accessrules-cdb-from-fs</a> and
+<a href="s6-accessrules-fs-from-cdb.html">s6-accessrules-fs-from-cdb</a>
+conversion tools.
+</p>
+
+<h3> Rules format </h3>
+
+<p>
+ The rules file, or rules directory, follows the
+<a href="libs6/accessrules.html">s6 accessrules format</a> for uid and
+gid checking. For every connecting client, skabus-dynteed matches the uid
+and gid of the client against the provided ruleset, and determines whether
+the client is authorized or not to connect.
+The right to connect is given if an
+<tt>allow</tt> file is found in one of the subdirectories checked by
+<a href="libs6/accessrules.html#uidgid">s6_accessrules_keycheck_uidgid</a>.
+For instance, to allow everyone to connect, touch
+<tt><em>rulesdir</em>/uid/default/allow</tt>.
+</p>
+
+<p>
+ If a <em>rulesfile</em> or <em>rulesdir</em> has been provided to
+skabus-dynteed, and the client's uid and gid match no rule in the
+ruleset, then the connection is denied.
+</p>
+
+<h2> Notes </h2>
+
+<ul>
+ <li> skabus-dynteed is meant to be execve'd into by a program that gets
+the listening socket. That program is normally
+<a href="//skarnet.org/software/s6/s6-ipcserver-socketbinder.html">s6-ipcserver-socketbinder</a>,
+which creates the socket itself; but it can be a different one if the
+socket is to be obtained by another means, for instance if it has
+been retrieved from a fd-holding daemon. </li>
+ <li> Clients can plug into the data stream at any time. The data stream
+should have a format making it easy for clients to synchronize with it. </li>
+ <li> The simplest way of connecting to a skabus-dynteed instance and
+reading the data stream is via the
+<a href="skabus-dyntee-client.html">skabus-dyntee-client</a> program. </li>
+</ul>
+
+</body>
+</html>
diff --git a/doc/upgrade.html b/doc/upgrade.html
new file mode 100644
index 0000000..0827f95
--- /dev/null
+++ b/doc/upgrade.html
@@ -0,0 +1,28 @@
+<html>
+  <head>
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+    <meta http-equiv="Content-Language" content="en" />
+    <title>skabus: how to upgrade</title>
+    <meta name="Description" content="skabus: how to upgrade" />
+    <meta name="Keywords" content="skabus installation upgrade" />
+    <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> -->
+  </head>
+<body>
+
+<p>
+<a href="index.html">skabus</a><br />
+<a href="//skarnet.org/software/">Software</a><br />
+<a href="//skarnet.org/">skarnet.org</a>
+</p>
+
+<h1> What has changed in skabus </h1>
+
+<h2> in 0.0.1.0 </h2>
+
+<ul>
+ <li> Initial release. </li>
+</ul>
+
+</body>
+</html>
diff --git a/package/deps-build b/package/deps-build
new file mode 100644
index 0000000..d63229b
--- /dev/null
+++ b/package/deps-build
@@ -0,0 +1,3 @@
+/package/prog/skalibs
+/package/admin/execline
+/package/admin/s6
diff --git a/package/deps.mak b/package/deps.mak
new file mode 100644
index 0000000..098b243
--- /dev/null
+++ b/package/deps.mak
@@ -0,0 +1,14 @@
+#
+# This file has been generated by tools/gen-deps.sh
+#
+
+src/misc/skabus-dyntee-client.o src/misc/skabus-dyntee-client.lo: src/misc/skabus-dyntee-client.c
+src/misc/skabus-dyntee.o src/misc/skabus-dyntee.lo: src/misc/skabus-dyntee.c src/include/skabus/config.h
+src/misc/skabus-dynteed.o src/misc/skabus-dynteed.lo: src/misc/skabus-dynteed.c
+
+skabus-dyntee: EXTRA_LIBS :=
+skabus-dyntee: src/misc/skabus-dyntee.o -lskarnet
+skabus-dyntee-client: EXTRA_LIBS :=
+skabus-dyntee-client: src/misc/skabus-dyntee-client.o -lskarnet
+skabus-dynteed: EXTRA_LIBS :=
+skabus-dynteed: src/misc/skabus-dynteed.o -ls6 -lskarnet
diff --git a/package/info b/package/info
new file mode 100644
index 0000000..5fefced
--- /dev/null
+++ b/package/info
@@ -0,0 +1,4 @@
+package=skabus
+version=0.0.1.0
+category=admin
+package_macro_name=SKABUS
diff --git a/package/modes b/package/modes
new file mode 100644
index 0000000..5002c47
--- /dev/null
+++ b/package/modes
@@ -0,0 +1,3 @@
+skabus-dyntee		0755
+skabus-dynteed		0755
+skabus-dyntee-client	0755
diff --git a/package/targets.mak b/package/targets.mak
new file mode 100644
index 0000000..e0b6e6b
--- /dev/null
+++ b/package/targets.mak
@@ -0,0 +1,8 @@
+BIN_TARGETS := \
+skabus-dyntee \
+skabus-dynteed \
+skabus-dyntee-client
+
+LIBEXEC_TARGETS :=
+
+LIB_DEFS :=
diff --git a/patch-for-solaris b/patch-for-solaris
new file mode 100755
index 0000000..2d1296b
--- /dev/null
+++ b/patch-for-solaris
@@ -0,0 +1,21 @@
+#!/usr/xpg4/bin/sh
+
+patchit () {
+  echo '#!/usr/xpg4/bin/sh' > $1.tmp
+  tail -n +2 $1 >> $1.tmp
+  mv -f $1.tmp $1
+  chmod 755 $1
+}
+
+# Solaris doesn't understand POSIX.1-2008 either.
+sed -e 's/XOPEN_SOURCE=700/XOPEN_SOURCE=600/' < configure > configure.tmp
+mv -f configure.tmp configure
+
+patchit ./configure
+patchit ./tools/install.sh
+patchit ./tools/gen-deps.sh
+
+echo 'SHELL := /usr/xpg4/bin/sh' > Makefile.tmp
+echo >> Makefile.tmp
+cat Makefile >> Makefile.tmp
+mv -f Makefile.tmp Makefile
diff --git a/src/include/skabus/skabus.h b/src/include/skabus/skabus.h
new file mode 100644
index 0000000..51b161f
--- /dev/null
+++ b/src/include/skabus/skabus.h
@@ -0,0 +1,15 @@
+/* ISC license. */
+
+#ifndef SKABUS_H
+#define SKABUS_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
diff --git a/src/misc/deps-exe/skabus-dyntee b/src/misc/deps-exe/skabus-dyntee
new file mode 100644
index 0000000..e7187fe
--- /dev/null
+++ b/src/misc/deps-exe/skabus-dyntee
@@ -0,0 +1 @@
+-lskarnet
diff --git a/src/misc/deps-exe/skabus-dyntee-client b/src/misc/deps-exe/skabus-dyntee-client
new file mode 100644
index 0000000..e7187fe
--- /dev/null
+++ b/src/misc/deps-exe/skabus-dyntee-client
@@ -0,0 +1 @@
+-lskarnet
diff --git a/src/misc/deps-exe/skabus-dynteed b/src/misc/deps-exe/skabus-dynteed
new file mode 100644
index 0000000..83cec1e
--- /dev/null
+++ b/src/misc/deps-exe/skabus-dynteed
@@ -0,0 +1,2 @@
+-ls6
+-lskarnet
diff --git a/src/misc/skabus-dyntee-client.c b/src/misc/skabus-dyntee-client.c
new file mode 100644
index 0000000..b73980d
--- /dev/null
+++ b/src/misc/skabus-dyntee-client.c
@@ -0,0 +1,39 @@
+/* ISC license. */
+
+#include <skalibs/nonposix.h>
+#include <sys/socket.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/webipc.h>
+
+#define USAGE "skabus-dyntee-client path prog..."
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  PROG = "skabus-dyntee-client" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      int opt = subgetopt_r(argc, argv, "", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+    if (argc < 2) dieusage() ;
+  }
+
+  {
+    int fd = ipc_stream_b() ;
+    if (fd < 0) strerr_diefu1sys(111, "create socket") ;
+    if (!ipc_connect(fd, argv[0])) strerr_diefu2sys(111, "connect to ", argv[0]) ;
+    if (shutdown(fd, SHUT_WR) < 0) strerr_diefu1sys(111, "shutdown socket for writing") ;
+    if (fd_move(0, fd) < 0) strerr_diefu1sys(111, "move socket fd to stdin") ;
+  }
+  xpathexec_run(argv[1], argv+1, envp) ;
+}
diff --git a/src/misc/skabus-dyntee.c b/src/misc/skabus-dyntee.c
new file mode 100644
index 0000000..f0832c4
--- /dev/null
+++ b/src/misc/skabus-dyntee.c
@@ -0,0 +1,149 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <limits.h>
+#include <skalibs/types.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/djbunix.h>
+#include <execline/config.h>
+#include <s6/config.h>
+#include <skabus/config.h>
+
+#define USAGE "skabus-dyntee [ -d | -D ] [ -1 ] [ -c maxconn ] [ -b backlog ] [ -G gid,gid,... ] [ -g gid ] [ -u uid ] [ -U ] [ -t timeout ] [ -T lameducktimeout ] [ -i rulesdir | -x rulesfile ] socketpath"
+#define dieusage() strerr_dieusage(100, USAGE)
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  int flag1 = 0 ;
+  int flagU = 0 ;
+  int flagreuse = 1 ;
+  uid_t uid = 0 ;
+  gid_t gid = 0 ;
+  gid_t gids[NGROUPS_MAX] ;
+  size_t gidn = (size_t)-1 ;
+  unsigned int maxconn = 0 ;
+  unsigned int backlog = (unsigned int)-1 ;
+  unsigned int timeout = 0 ;
+  unsigned int ltimeout = 0 ;
+  char const *rulesdir = 0 ;
+  char const *rulesfile = 0 ;
+  PROG = "skabus-dyntee" ;
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    for (;;)
+    {
+      register int opt = subgetopt_r(argc, argv, "Dd1Uc:b:u:g:G:t:T:i:x:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'D' : flagreuse = 0 ; break ;
+        case 'd' : flagreuse = 1 ; break ;
+        case '1' : flag1 = 1 ; break ;
+        case 'c' : if (!uint0_scan(l.arg, &maxconn)) dieusage() ; if (!maxconn) maxconn = 1 ; break ;
+        case 'b' : if (!uint0_scan(l.arg, &backlog)) dieusage() ; break ;
+        case 'u' : if (!uid0_scan(l.arg, &uid)) dieusage() ; break ;
+        case 'g' : if (!gid0_scan(l.arg, &gid)) dieusage() ; break ;
+        case 'G' : if (!gid_scanlist(gids, NGROUPS_MAX, l.arg, &gidn) && *l.arg) dieusage() ; break ;
+        case 'U' : flagU = 1 ; uid = 0 ; gid = 0 ; gidn = (unsigned int)-1 ; break ;
+        case 't' : if (!uint0_scan(l.arg, &timeout)) dieusage() ; break ;
+        case 'T' : if (!uint0_scan(l.arg, &ltimeout)) dieusage() ; break ;
+        case 'i' : rulesdir = l.arg ; rulesfile = 0 ; break ;
+        case 'x' : rulesfile = l.arg ; rulesdir = 0 ; break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+    if (!argc) dieusage() ;
+  }
+
+  {
+    size_t pos = 0 ;
+    unsigned int m = 0 ;
+    int fdin = dup(0) ;
+    char const *newargv[31] ;
+    char fmt[UINT_FMT * 5 + UID_FMT + GID_FMT * (1 + NGROUPS_MAX)] ;
+    if (fdin < 0) strerr_diefu1sys(111, "dup(0)") ;    
+    if (fdin < 3) strerr_dief1x(100, "invalid standard file descriptors") ;
+    pos += uint_fmt(fmt + pos, fdin) ;
+    fmt[pos++] = 0 ;
+    newargv[m++] = S6_EXTBINPREFIX "s6-ipcserver-socketbinder" ;
+    if (!flagreuse) newargv[m++] = "-D" ;
+    if (backlog != (unsigned int)-1)
+    {
+      newargv[m++] = "-b" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, backlog) ;
+      fmt[pos++] = 0 ;
+    }
+    newargv[m++] = "--" ;
+    newargv[m++] = argv[0] ;
+    if (flagU || uid || gid || gidn != (size_t)-1)
+    {
+      newargv[m++] = S6_EXTBINPREFIX "s6-applyuidgid" ;
+      if (flagU) newargv[m++] = "-Uz" ;
+      if (uid)
+      {
+        newargv[m++] = "-u" ;
+        newargv[m++] = fmt + pos ;
+        pos += uid_fmt(fmt + pos, uid) ;
+        fmt[pos++] = 0 ;
+      }
+      if (gid)
+      {
+        newargv[m++] = "-g" ;
+        newargv[m++] = fmt + pos ;
+        pos += gid_fmt(fmt + pos, gid) ;
+        fmt[pos++] = 0 ;
+      }
+      if (gidn != (size_t)-1)
+      {
+        newargv[m++] = "-G" ;
+        newargv[m++] = fmt + pos ;
+        pos += gid_fmtlist(fmt + pos, gids, gidn) ;
+        fmt[pos++] = 0 ;
+      }
+      newargv[m++] = "--" ;
+    } 
+    newargv[m++] = EXECLINE_EXTBINPREFIX "fdswap" ;
+    newargv[m++] = "0" ;
+    newargv[m++] = fmt ;
+    newargv[m++] = SKABUS_BINPREFIX "skabus-dynteed" ;
+    newargv[m++] = "-d" ;
+    newargv[m++] = fmt ;
+    if (flag1) newargv[m++] = "-1" ;
+    if (maxconn)
+    {
+      newargv[m++] = "-c" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, maxconn) ;
+      fmt[pos++] = 0 ;
+    }
+    if (timeout)
+    {
+      newargv[m++] = "-t" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, timeout) ;
+      fmt[pos++] = 0 ;
+    }
+    if (ltimeout)
+    {
+      newargv[m++] = "-T" ;
+      newargv[m++] = fmt + pos ;
+      pos += uint_fmt(fmt + pos, ltimeout) ;
+      fmt[pos++] = 0 ;
+    }
+    if (rulesdir)
+    {
+      newargv[m++] = "-i" ;
+      newargv[m++] = rulesdir ;
+    }
+    else if (rulesfile)
+    {
+      newargv[m++] = "-x" ;
+      newargv[m++] = rulesfile ;
+    }
+    newargv[m++] = 0 ;
+    xpathexec_run(newargv[0], newargv, envp) ;
+  }
+}
diff --git a/src/misc/skabus-dynteed.c b/src/misc/skabus-dynteed.c
new file mode 100644
index 0000000..8b0e292
--- /dev/null
+++ b/src/misc/skabus-dynteed.c
@@ -0,0 +1,305 @@
+/* ISC license. */
+
+#include <skalibs/nonposix.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/uio.h>
+#include <sys/socket.h>  /* shutdown */
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <signal.h>
+#include <skalibs/types.h>
+#include <skalibs/siovec.h>
+#include <skalibs/allreadwrite.h>
+#include <skalibs/sgetopt.h>
+#include <skalibs/error.h>
+#include <skalibs/bufalloc.h>
+#include <skalibs/buffer.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/tai.h>
+#include <skalibs/getpeereid.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/sig.h>
+#include <skalibs/iopause.h>
+#include <skalibs/selfpipe.h>
+#include <skalibs/cdb.h>
+#include <s6/accessrules.h>
+
+#define USAGE "skabus-dynteed [ -d fdsocket ] [ -c maxconn ] [ -1 ] [ -t timeout ] [ -T lameducktimeout ] [ -i rulesdir | -x rulesfile ]"
+#define dieusage() strerr_dieusage(100, USAGE) ;
+#define dienomem() strerr_diefu1sys(111, "stralloc_catb") ;
+#define die() strerr_dief1sys(101, "unexpected error") ;
+
+#define SKABUS_DYNTEE_MAX 1000
+
+static int cont = 1 ;
+static tain_t lameduckdeadline ;
+
+static unsigned int rulestype = 0 ;
+static char const *rules = 0 ;
+static int cdbfd = -1 ;
+static struct cdb cdbmap = CDB_ZERO ;
+
+typedef struct client_s client_t, *client_t_ref ;
+struct client_s
+{
+  unsigned int xindex ;
+  tain_t deadline ;
+  bufalloc ba ;
+} ;
+
+static void client_free (client_t *c)
+{
+  fd_close(bufalloc_fd(&c->ba)) ;
+  bufalloc_free(&c->ba) ;
+}
+
+static void handle_signals (void)
+{
+  for (;;) switch (selfpipe_read())
+  {
+    case -1 : strerr_diefu1sys(111, "selfpipe_read()") ;
+    case 0 : return ;
+    case SIGTERM :
+    {
+      if (cont)
+      {
+        cont = 0 ;
+        tain_add_g(&lameduckdeadline, &lameduckdeadline) ;
+      }
+      break ;
+    }
+    case SIGHUP :
+    {
+      int fd ;
+      struct cdb c = CDB_ZERO ;
+      if (rulestype != 2) break ;
+      fd = open_readb(rules) ;
+      if (fd < 0) break ;
+      if (cdb_init(&c, fd) < 0)
+      {
+        fd_close(fd) ;
+        break ;
+      }
+      cdb_free(&cdbmap) ;
+      fd_close(cdbfd) ;
+      cdbfd = fd ;
+      cdbmap = c ;
+    }
+    break ;
+    default : break ;
+  }
+}
+
+static inline int new_connection (int fd)
+{
+  s6_accessrules_params_t params = S6_ACCESSRULES_PARAMS_ZERO ;
+  uid_t uid ;
+  gid_t gid ;
+  if (!rulestype) return 1 ;
+  if (getpeereid(fd, &uid, &gid) < 0)
+  {
+    strerr_warnwu1sys("getpeereid") ;
+    return 0 ;
+  }
+  if ((rulestype == 1 ? s6_accessrules_uidgid_fs(uid, gid, rules, &params) : s6_accessrules_uidgid_cdb(uid, gid, &cdbmap, &params)) != S6_ACCESSRULES_ALLOW)
+    return 0 ;
+  s6_accessrules_params_free(&params) ;
+  return 1 ;
+}
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  tain_t readtto ;
+  int spfd ;
+  int flag1 = 0 ;
+  unsigned int maxconn = 40 ;
+  unsigned int fdsocket = 3 ;
+  PROG = "skabus-dynteed" ;
+
+  {
+    subgetopt_t l = SUBGETOPT_ZERO ;
+    unsigned int t = 0, T = 0 ;
+    for (;;)
+    {
+      int opt = subgetopt_r(argc, argv, "d:1c:i:x:t:", &l) ;
+      if (opt == -1) break ;
+      switch (opt)
+      {
+        case 'd' : if (!uint0_scan(l.arg, &fdsocket)) dieusage() ; break ;
+        case '1' : flag1 = 1 ; break ;
+        case 'i' : rules = l.arg ; rulestype = 1 ; break ;
+        case 'x' : rules = l.arg ; rulestype = 2 ; break ;
+        case 't' : if (!uint0_scan(l.arg, &t)) dieusage() ; break ;
+        case 'T' : if (!uint0_scan(l.arg, &T)) dieusage() ; break ;
+        case 'c' : if (!uint0_scan(l.arg, &maxconn)) dieusage() ; break ;
+        default : dieusage() ;
+      }
+    }
+    argc -= l.ind ; argv += l.ind ;
+    if (t) tain_from_millisecs(&readtto, t) ;
+    else readtto = tain_infinite_relative ;
+    if (T) tain_from_millisecs(&lameduckdeadline, T) ;
+    else lameduckdeadline = tain_infinite_relative ;
+  }
+  if (maxconn > SKABUS_DYNTEE_MAX) maxconn = SKABUS_DYNTEE_MAX ;
+  if (!maxconn) maxconn = 1 ;
+  {
+    struct stat st ;
+    if (fstat(fdsocket, &st) < 0) strerr_diefu1sys(111, "fstat socket descriptor") ;
+    if (!S_ISSOCK(st.st_mode)) strerr_dief1x(100, "descriptor is not a socket") ;
+  }
+  if (flag1)
+  {
+    if (fcntl(1, F_GETFD) < 0)
+      strerr_dief1sys(100, "called with option -1 but stdout said") ;
+  }
+  else close(1) ;
+  if (ndelay_on(0) < 0) strerr_diefu1sys(111, "set stdin non-blocking") ;
+  spfd = selfpipe_init() ;
+  if (spfd < 0) strerr_diefu1sys(111, "selfpipe_init") ;
+  if (sig_ignore(SIGPIPE) < 0) strerr_diefu1sys(111, "ignore SIGPIPE") ;
+  {
+    sigset_t set ;
+    sigemptyset(&set) ;
+    sigaddset(&set, SIGTERM) ;
+    sigaddset(&set, SIGHUP) ;
+    if (selfpipe_trapset(&set) < 0) strerr_diefu1sys(111, "trap signals") ;
+  }
+
+  if (rulestype == 2)
+  {
+    cdbfd = open_readb(rules) ;
+    if (cdbfd < 0) strerr_diefu3sys(111, "open ", rules, " for reading") ;
+    if (cdb_init(&cdbmap, cdbfd) < 0)
+      strerr_diefu2sys(111, "cdb_init ", rules) ;
+  }
+
+  {
+    unsigned int numconn = 0 ;
+    client_t clients[maxconn] ;
+
+    if (flag1)
+    {
+      fd_write(1, "\n", 1) ;
+      fd_close(1) ;
+    }
+    tain_now_g() ;
+
+    for (;;)
+    {
+      tain_t deadline ;
+      int r = 2 ;
+      iopause_fd x[2 + cont + numconn] ;
+      x[0].fd = spfd ;
+      x[0].events = IOPAUSE_READ ;
+      x[1].fd = fdsocket ;
+      x[1].events = (cont && (numconn < maxconn)) ? IOPAUSE_READ : 0 ;
+      if (cont)
+      {
+        tain_add_g(&deadline, &tain_infinite_relative) ;
+        x[2].fd = 0 ;
+        x[2].events = IOPAUSE_READ ;
+        r++ ;
+      }
+      else deadline = lameduckdeadline ;
+      for (unsigned int i = 0 ; i < numconn ; i++) if (bufalloc_len(&clients[i].ba))
+      {
+        if (tain_less(&clients[i].deadline, &deadline)) deadline = clients[i].deadline ;
+        x[r].fd = bufalloc_fd(&clients[i].ba) ;
+        x[r].events = IOPAUSE_WRITE ;
+        clients[i].xindex = r++ ;
+      }
+
+      r = iopause_g(x, r, &deadline) ;
+      if (r < 0) strerr_diefu1sys(111, "iopause") ;
+
+      if (!r)
+      {
+        for (unsigned int i = 0 ; i < numconn ; i++)
+        {
+          if (bufalloc_len(&clients[i].ba) && !tain_future(&clients[i].deadline))
+          {
+            client_free(clients + i) ;
+            clients[i--] = clients[--numconn] ;
+          }
+        }
+        if (!(cont || (numconn && tain_future(&lameduckdeadline)))) break ;
+        continue ;
+      }
+
+      if (x[0].revents & IOPAUSE_READ) handle_signals() ;
+
+      for (unsigned int i = 0 ; i < numconn ; i++)
+      {
+        if (x[clients[i].xindex].revents & (IOPAUSE_WRITE | IOPAUSE_EXCEPT))
+        {
+          if (!bufalloc_flush(&clients[i].ba) && !error_isagain(errno))
+          {
+            client_free(clients + i) ;
+            clients[i--] = clients[--numconn] ;
+          }
+        }
+      }
+
+      if (cont && x[1].revents & IOPAUSE_READ)
+      {
+        int fd = ipc_accept_nb(fdsocket, 0, 0, 0) ;
+        if (fd < 0)
+        {
+          if (!error_isagain(errno)) strerr_diefu1sys(111, "accept") ;
+        }
+        else if (!new_connection(fd)) fd_close(fd) ;
+        else if (shutdown(fd, SHUT_RD) < 0)
+        {
+          fd_close(fd) ;
+          strerr_warnwu1sys("shutdown client connection for reading - aborting it") ;
+        }
+        else
+        {
+          bufalloc_init(&clients[numconn].ba, &fd_write, fd) ;
+          tain_copynow(&clients[numconn].deadline) ;
+          numconn++ ;
+        }
+      }
+
+      if (cont && x[2].revents & IOPAUSE_READ)
+      {
+        ssize_t r = sanitize_read(buffer_fill(buffer_0)) ;
+        if (r < 0)
+        {
+          fd_close(0) ;
+          cont = 0 ;
+          tain_add_g(&lameduckdeadline, &lameduckdeadline) ;
+          if (errno != EPIPE) strerr_warnwu1sys("read from stdin") ;
+        }
+        if (r > 0)
+        {
+          struct iovec v[2] ;
+          buffer_rpeek(buffer_0, v) ;
+          for (unsigned int i = 0 ; i < numconn ; i++)
+          {
+            if (!bufalloc_putv(&clients[i].ba, v, 2)) dienomem() ;
+            if (!tain_future(&clients[i].deadline)) tain_add_g(&clients[i].deadline, &readtto) ;
+          }
+          buffer_rseek(buffer_0, siovec_len(v, 2)) ;
+        }
+      }
+
+      if (!cont)
+      {
+        for (unsigned int i = 0 ; i < numconn ; i++)
+        {
+          if (!bufalloc_len(&clients[i].ba))
+          {
+            client_free(clients + i) ;
+            clients[i--] = clients[--numconn] ;
+          }
+        }
+        if (!numconn) break ;
+      }
+    }
+  }
+  return 0 ;
+}
diff --git a/tools/gen-deps.sh b/tools/gen-deps.sh
new file mode 100755
index 0000000..6383ac2
--- /dev/null
+++ b/tools/gen-deps.sh
@@ -0,0 +1,93 @@
+#!/bin/sh -e
+
+. package/info
+
+echo '#'
+echo '# This file has been generated by tools/gen-deps.sh'
+echo '#'
+echo
+
+for dir in src/include/${package} src/* ; do
+  for file in $(ls -1 $dir | grep -- \\.h$) ; do
+    {
+      grep -F -- "#include <${package}/" < ${dir}/$file | cut -d'<' -f2 | cut -d'>' -f1 ;
+      grep -- '#include ".*\.h"' < ${dir}/$file | cut -d'"' -f2
+    } | sort -u | {
+      deps=
+      while read dep ; do
+        if echo $dep | grep -q "^${package}/" ; then
+          deps="$deps src/include/$dep"
+        elif test -f "${dir}/$dep" ; then
+          deps="$deps ${dir}/$dep"
+        else
+          deps="$deps src/include-local/$dep"
+        fi
+      done
+      if test -n "$deps" ; then
+        echo "${dir}/${file}:${deps}"
+      fi
+    }
+  done
+done
+
+for dir in src/* ; do
+  for file in $(ls -1 $dir | grep -- \\.c$) ; do
+    {
+      grep -F -- "#include <${package}/" < ${dir}/$file | cut -d'<' -f2 | cut -d'>' -f1 ;
+      grep -- '#include ".*\.h"' < ${dir}/$file | cut -d'"' -f2
+    } | sort -u | {
+      deps=" ${dir}/$file"
+      while read dep ; do
+        if echo $dep | grep -q "^${package}/" ; then
+          deps="$deps src/include/$dep"
+        elif test -f "${dir}/$dep" ; then
+          deps="$deps ${dir}/$dep"
+        else
+          deps="$deps src/include-local/$dep"
+        fi
+      done
+      o=$(echo $file | sed s/\\.c$/.o/)
+      lo=$(echo $file | sed s/\\.c$/.lo/)
+      echo "${dir}/${o} ${dir}/${lo}:${deps}"
+    }
+  done
+done
+echo
+
+for dir in $(ls -1 src | grep -v ^include) ; do
+  for file in $(ls -1 src/$dir/deps-lib) ; do
+    deps=
+    libs=
+    while read dep ; do
+      if echo $dep | grep -q -e ^-l -e '^\${.*_LIB}' ; then
+        libs="$libs $dep"
+      else
+        deps="$deps src/$dir/$dep"
+      fi
+    done < src/$dir/deps-lib/$file
+    echo 'ifeq ($(strip $(STATIC_LIBS_ARE_PIC)),)'
+    echo "lib${file}.a.xyzzy:$deps"
+    echo else
+    echo "lib${file}.a.xyzzy:$(echo "$deps" | sed 's/\.o/.lo/g')"
+    echo endif
+    echo "lib${file}.so.xyzzy: EXTRA_LIBS :=$libs"
+    echo "lib${file}.so.xyzzy:$(echo "$deps" | sed 's/\.o/.lo/g')"
+  done
+
+  for file in $(ls -1 src/$dir/deps-exe) ; do
+    deps=
+    libs=
+    while read dep ; do
+      if echo $dep | grep -q -- \\.o$ ; then
+        dep="src/$dir/$dep"
+      fi
+      if echo $dep | grep -q -- '^\${.*_LIB}' ; then
+        libs="$libs $dep"
+      else
+        deps="$deps $dep"
+      fi
+    done < src/$dir/deps-exe/$file
+    echo "$file: EXTRA_LIBS :=$libs"
+    echo "$file: src/$dir/$file.o$deps"
+  done
+done
diff --git a/tools/install.sh b/tools/install.sh
new file mode 100755
index 0000000..89f9428
--- /dev/null
+++ b/tools/install.sh
@@ -0,0 +1,64 @@
+#!/bin/sh
+
+usage() {
+  echo "usage: $0 [-D] [-l] [-m mode] src dst" 1>&2
+  exit 1
+}
+
+mkdirp=false
+symlink=false
+mode=0755
+
+while getopts Dlm: name ; do
+  case "$name" in
+    D) mkdirp=true ;;
+    l) symlink=true ;;
+    m) mode=$OPTARG ;;
+    ?) usage ;;
+  esac
+done
+shift $(($OPTIND - 1))
+
+test "$#" -eq 2 || usage
+src=$1
+dst=$2
+tmp="$dst.tmp.$$"
+
+case "$dst" in
+  */) echo "$0: $dst ends in /" 1>&2 ; exit 1 ;;
+esac
+
+set -C
+set -e
+
+if $mkdirp ; then
+  umask 022
+  case "$2" in
+    */*) mkdir -p "${dst%/*}" ;;
+  esac
+fi
+
+trap 'rm -f "$tmp"' EXIT INT QUIT TERM HUP
+
+umask 077
+
+if $symlink ; then
+  ln -s "$src" "$tmp"
+else
+  cat < "$1" > "$tmp"
+  chmod "$mode" "$tmp"
+fi
+
+mv -f "$tmp" "$dst"
+if test -d "$dst" ; then
+  rm -f "$dst/$(basename $tmp)"
+  if $symlink ; then
+    mkdir "$tmp"
+    ln -s "$src" "$tmp/$(basename $dst)"
+    mv -f "$tmp/$(basename $dst)" "${dst%/*}"
+    rmdir "$tmp"
+  else
+    echo "$0: $dst is a directory" 1>&2
+    exit 1
+  fi
+fi