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authorEric Wong <normalperson@yhbt.net>2010-01-02 02:33:23 -0800
committerEric Wong <normalperson@yhbt.net>2010-01-02 03:01:36 -0800
commit522d4d1472c216bd95a16ca5b118bc14693aad64 (patch)
treef8fd62c3dd562117edc71e2488542532e9db4cd5
-rw-r--r--.document7
-rw-r--r--.gitignore14
-rw-r--r--COPYING165
-rw-r--r--Documentation/.gitignore5
-rw-r--r--Documentation/GNUmakefile30
-rw-r--r--Documentation/posix-mq.rb.1.txt153
-rwxr-xr-xGIT-VERSION-GEN40
-rw-r--r--GNUmakefile179
-rw-r--r--LICENSE16
-rw-r--r--README70
-rw-r--r--Rakefile159
-rwxr-xr-xbin/posix-mq.rb138
-rw-r--r--ext/posix_mq/extconf.rb9
-rw-r--r--ext/posix_mq/posix_mq.c813
-rw-r--r--lib/posix_mq.rb34
-rw-r--r--local.mk.sample70
-rw-r--r--posix_mq.gemspec39
-rw-r--r--setup.rb1586
-rw-r--r--test/test_posix_mq.rb225
19 files changed, 3752 insertions, 0 deletions
diff --git a/.document b/.document
new file mode 100644
index 0000000..6f5c676
--- /dev/null
+++ b/.document
@@ -0,0 +1,7 @@
+README
+LICENSE
+NEWS
+ChangeLog
+lib
+ext/posix_mq/posix_mq.c
+posix-mq.rb.1
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a81a2c1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,14 @@
+*.so
+*.o
+*.log
+*.rbc
+Makefile
+/GIT-VERSION-FILE
+/local.mk
+/NEWS
+/ChangeLog
+/.manifest
+/GIT-VERSION-FILE
+/man
+/pkg
+/doc
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..cca7fc2
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
diff --git a/Documentation/.gitignore b/Documentation/.gitignore
new file mode 100644
index 0000000..46679d6
--- /dev/null
+++ b/Documentation/.gitignore
@@ -0,0 +1,5 @@
+*.1
+*.5
+*.7
+*.gz
+*.html
diff --git a/Documentation/GNUmakefile b/Documentation/GNUmakefile
new file mode 100644
index 0000000..8aea6ae
--- /dev/null
+++ b/Documentation/GNUmakefile
@@ -0,0 +1,30 @@
+all::
+
+PANDOC = pandoc
+PANDOC_OPTS = -f markdown --email-obfuscation=none --sanitize-html
+pandoc = $(PANDOC) $(PANDOC_OPTS)
+pandoc_html = $(pandoc) --toc -t html --no-wrap
+
+man1 := $(addsuffix .1,posix-mq.rb)
+html1 := $(addsuffix .html,$(man1))
+
+all:: html man
+
+html: $(html1)
+man: $(man1)
+
+install-html: html
+        mkdir -p ../doc/man1
+        install -m 644 $(html1) ../doc/man1
+
+install-man: man
+        mkdir -p ../man/man1
+        install -m 644 $(man1) ../man/man1
+
+%.1: %.1.txt
+        $(pandoc) -s -t man < $< > $@+ && mv $@+ $@
+%.1.html: %.1.txt
+        $(pandoc_html) < $< > $@+ && mv $@+ $@
+
+clean::
+        $(RM) $(man1) $(html1)
diff --git a/Documentation/posix-mq.rb.1.txt b/Documentation/posix-mq.rb.1.txt
new file mode 100644
index 0000000..e9005ee
--- /dev/null
+++ b/Documentation/posix-mq.rb.1.txt
@@ -0,0 +1,153 @@
+% posix-mq.rb(1) posix-mq.rb User Manual
+% Ruby POSIX MQ hackers <ruby.posix.mq@librelist.com>
+% Jan 1, 2010
+
+# NAME
+
+posix-mq.rb - command-line interface for POSIX message queues
+
+# SYNOPSIS
+
+MQUEUE=/name posix-mq.rb COMMAND [*OPTIONS*] [*ARGUMENTS*]
+
+# DESCRIPTION
+
+A command-line interface for manipulating POSIX message queues.  It is
+useful for testing and debugging applications using POSIX message
+queues.
+
+# COMMANDS
+
+*create* - create a new message queue
+
+*attr* - output attributes of the message queue
+
+*send* - insert a message into the queue from stdin or the command-line
+
+*receive* - take a message from the queue and outputs it to stdout
+
+*wait* - sleep until a message is available in the queue
+
+*unlink* - unlink the message queue
+
+# CREATE USAGE
+
+The *create* command accepts the following options:
+
+-x, \--exclusive
+:   This causes queue creation to fail if the queue exists.
+
+-m, \--mode MODE
+:   The MODE to open the file under, the actual mode of the queue
+    will be AND-ed with the current umask (like open(2)).
+
+-c, \--maxmsg COUNT
+:   The maximum messages in the queue.  The default and limit of this
+    value is system-dependent.  This must be specified if \--msgsize is
+    also specified.
+
+-s, \--msgsize BYTES
+:   The maximum size of an individual message. The default and limit of
+    this value is system-dependent.  This must be specified if \--maxmsg
+    is also specified.
+
+# ATTR USAGE
+
+The *attr* command takes no special options nor command-line arguments.
+The output format of this command is suitable for "eval" in
+shell scripts.  Sample output is below:
+
+        flags=0
+        maxmsg=10
+        msgsize=8192
+        curmsgs=3
+
+See mq_getattr(3) for information on the meaning of the fields.
+
+# SEND USAGE
+
+The *send* command will read a message from standard input if no
+command-line arguments are given.  If command-line arguments are
+given, each argument is considered its own message and will be
+inserted into the queue separately.
+
+The following command-line arguments are accepted:
+
+-n, \--nonblock
+:   Exit immediately with error if the message queue is full.
+    Normally posix-mq.rb(1) will block until the queue is writable or
+    interrupted.  This may not be used in conjunction with \--timeout .
+-t, \--timeout SECONDS
+:   Timeout and exit with error after SECONDS if the message queue is full.
+    This may not be used in conjunction with \--nonblock.
+-p, \--priority PRIORITY
+:   Specify an integer PRIORITY, this value should be 0 through 31
+    (inclusive) for portability across POSIX-compliant systems.
+    The default priority is 0.
+
+# RECEIVE USAGE
+
+The *receive* command will output message to standard output.  It will
+read a message from standard input if no command-line arguments are
+given.  If command-line arguments are given, each argument is considered
+its own message and will be inserted into the queue separately.
+
+The following command-line arguments are accepted:
+
+-n, \--nonblock
+:   Exit immediately with error if the message queue is empty.
+    Normally posix-mq.rb(1) will block until the queue is readable or
+    interrupted.  This may not be used in conjunction with \--timeout .
+-t, \--timeout SECONDS
+:   Timeout and exit with error after SECONDS if the message queue is empty.
+    This may not be used in conjunction with \--nonblock.
+-p, \--priority
+:   Output the priority of the received message to stderr in the following
+    format:
+
+        priority=3
+
+    The priority is an unsigned integer.
+
+# WAIT USAGE
+
+The *wait* command will cause posix-mq.rb(1) to sleep until a message is
+available in the queue.  Only one process may wait on an empty queue,
+posix-mq.rb(1) will exit with an error if there is another waiting process.
+
+It takes no arguments and accepts the following options:
+
+-t, \--timeout SECONDS
+:   Timeout and exit with error after SECONDS if the message queue is empty.
+
+# UNLINK USAGE
+
+The *unlink* command prevents further opening and use of the current
+queue.  Existing processes with the queue open may continue to operate
+on the queue indefinitely.  If a new queue is created with the same
+name, the created queue is a different queue from the unlinked queue.
+See mq_unlink(3) for more information.
+
+# GENERAL OPTIONS
+-q
+:   Do not show warning/error messages, suitable for scripting.
+
+\-h, \--help
+:   Show summary usage
+
+# ENVIRONMENT
+
+All commands rely on the MQUEUE environment variable.  The value
+of MQUEUE should always be prefixed with a slash ("/") for
+portability.
+
+# DIAGNOSTICS
+
+Exit status is normally 0.  Exit status is 2 if a timeout occurs, 1 for
+all other errors.
+
+# SEE ALSO
+
+* [mq_overview(7)][1]
+
+[1]: http://kernel.org/doc/man-pages/online/pages/man7/mq_overview.7.html
diff --git a/GIT-VERSION-GEN b/GIT-VERSION-GEN
new file mode 100755
index 0000000..4e7f0e3
--- /dev/null
+++ b/GIT-VERSION-GEN
@@ -0,0 +1,40 @@
+#!/bin/sh
+
+GVF=GIT-VERSION-FILE
+DEF_VER=v0.1.0.GIT
+
+LF='
+'
+
+# First see if there is a version file (included in release tarballs),
+# then try git-describe, then default.
+if test -f version
+then
+        VN=$(cat version) || VN="$DEF_VER"
+elif test -d .git -o -f .git &&
+        VN=$(git describe --abbrev=4 HEAD 2>/dev/null) &&
+        case "$VN" in
+        *$LF*) (exit 1) ;;
+        v[0-9]*)
+                git update-index -q --refresh
+                test -z "$(git diff-index --name-only HEAD --)" ||
+                VN="$VN-dirty" ;;
+        esac
+then
+        VN=$(echo "$VN" | sed -e 's/-/./g');
+else
+        VN="$DEF_VER"
+fi
+
+VN=$(expr "$VN" : v*'\(.*\)')
+
+if test -r $GVF
+then
+        VC=$(sed -e 's/^GIT_VERSION = //' <$GVF)
+else
+        VC=unset
+fi
+test "$VN" = "$VC" || {
+        echo >&2 "GIT_VERSION = $VN"
+        echo "GIT_VERSION = $VN" >$GVF
+}
diff --git a/GNUmakefile b/GNUmakefile
new file mode 100644
index 0000000..10e81e9
--- /dev/null
+++ b/GNUmakefile
@@ -0,0 +1,179 @@
+# use GNU Make to run tests in parallel, and without depending on RubyGems
+all::
+RUBY = ruby
+RAKE = rake
+GIT_URL = git://git.bogomips.org/ruby_posix_mq.git
+
+GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
+        @./GIT-VERSION-GEN
+-include GIT-VERSION-FILE
+-include local.mk
+ifeq ($(DLEXT),) # "so" for Linux
+  DLEXT := $(shell $(RUBY) -rrbconfig -e 'puts Config::CONFIG["DLEXT"]')
+endif
+ifeq ($(RUBY_VERSION),)
+  RUBY_VERSION := $(shell $(RUBY) -e 'puts RUBY_VERSION')
+endif
+
+base_bins := posix-mq.rb
+bins := $(addprefix bin/, $(base_bins))
+man1_bins := $(addsuffix .1, $(base_bins))
+man1_paths := $(addprefix man/man1/, $(man1_bins))
+
+install: $(bins)
+        $(prep_setup_rb)
+        $(RM) -r .install-tmp
+        mkdir .install-tmp
+        cp -p bin/* .install-tmp
+        $(RUBY) setup.rb all
+        $(RM) $^
+        mv .install-tmp/* bin/
+        $(RM) -r .install-tmp
+        $(prep_setup_rb)
+
+setup_rb_files := .config InstalledFiles
+prep_setup_rb := @-$(RM) $(setup_rb_files);$(MAKE) -C $(ext) clean
+
+clean:
+        -$(MAKE) -C ext/posix_mq clean
+        $(RM) $(setup_rb_files) ext/posix_mq/Makefile
+
+man:
+        $(MAKE) -C Documentation install-man
+
+pkg_extra := GIT-VERSION-FILE NEWS ChangeLog
+manifest: $(pkg_extra) man
+        $(RM) .manifest
+        $(MAKE) .manifest
+
+.manifest:
+        (git ls-files && \
+         for i in $@ $(pkg_extra) $(man1_paths); \
+         do echo $$i; done) | LC_ALL=C sort > $@+
+        cmp $@+ $@ || mv $@+ $@
+        $(RM) $@+
+
+NEWS: GIT-VERSION-FILE
+        $(RAKE) -s news_rdoc > $@+
+        mv $@+ $@
+
+SINCE =
+ChangeLog: LOG_VERSION = \
+  $(shell git rev-parse -q "$(GIT_VERSION)" >/dev/null 2>&1 && \
+          echo $(GIT_VERSION) || git describe)
+ifneq ($(SINCE),)
+ChangeLog: log_range = v$(SINCE)..$(LOG_VERSION)
+endif
+ChangeLog: GIT-VERSION-FILE
+        @echo "ChangeLog from $(GIT_URL) ($(log_range))" > $@+
+        @echo >> $@+
+        git log $(log_range) | sed -e 's/^/    /' >> $@+
+        mv $@+ $@
+
+news_atom := http://bogomips.org/ruby_posix_mq/NEWS.atom.xml
+cgit_atom := http://git.bogomips.org/cgit/ruby_posix_mq.git/atom/?h=master
+atom = <link rel="alternate" title="Atom feed" href="$(1)" \
+             type="application/atom+xml"/>
+
+# using rdoc 2.4.1+
+doc: .document NEWS ChangeLog
+        for i in $(man1_bins); do > $$i; done
+        rdoc -Na -t "$(shell sed -ne '1s/^= //p' README)"
+        install -m644 COPYING doc/COPYING
+        install -m644 $(shell grep '^[A-Z]' .document)  doc/
+        $(MAKE) -C Documentation install-html install-man
+        install -m644 $(man1_paths) doc/
+        cd doc && for i in $(base_bins); do \
+          html=$$(echo $$i | sed 's/\.rb/_rb/')_1.html; \
+          sed -e '/"documentation">/r man1/'$$i'.1.html' \
+                < $$html > tmp && mv tmp $$html; done
+        $(RUBY) -i -p -e \
+          '$$_.gsub!("</title>",%q{\&$(call atom,$(cgit_atom))})' \
+          doc/ChangeLog.html
+        $(RUBY) -i -p -e \
+          '$$_.gsub!("</title>",%q{\&$(call atom,$(news_atom))})' \
+          doc/NEWS.html doc/README.html
+        $(RAKE) -s news_atom > doc/NEWS.atom.xml
+        cd doc && ln README.html tmp && mv tmp index.html
+        $(RM) $(man1_bins)
+
+ifneq ($(VERSION),)
+rfproject := qrp
+rfpackage := posix_mq
+pkggem := pkg/$(rfpackage)-$(VERSION).gem
+pkgtgz := pkg/$(rfpackage)-$(VERSION).tgz
+release_notes := release_notes-$(VERSION)
+release_changes := release_changes-$(VERSION)
+
+release-notes: $(release_notes)
+release-changes: $(release_changes)
+$(release_changes):
+        $(RAKE) -s release_changes > $@+
+        $(VISUAL) $@+ && test -s $@+ && mv $@+ $@
+$(release_notes):
+        GIT_URL=$(GIT_URL) $(RAKE) -s release_notes > $@+
+        $(VISUAL) $@+ && test -s $@+ && mv $@+ $@
+
+# ensures we're actually on the tagged $(VERSION), only used for release
+verify:
+        test x"$(shell umask)" = x0022
+        git rev-parse --verify refs/tags/v$(VERSION)^{}
+        git diff-index --quiet HEAD^0
+        test `git rev-parse --verify HEAD^0` = \
+             `git rev-parse --verify refs/tags/v$(VERSION)^{}`
+
+fix-perms:
+        -git ls-tree -r HEAD | awk '/^100644 / {print $$NF}' | xargs chmod 644
+        -git ls-tree -r HEAD | awk '/^100755 / {print $$NF}' | xargs chmod 755
+
+gem: $(pkggem)
+
+install-gem: $(pkggem)
+        gem install $(CURDIR)/$<
+
+$(pkggem): manifest fix-perms
+        gem build $(rfpackage).gemspec
+        mkdir -p pkg
+        mv $(@F) $@
+
+$(pkgtgz): distdir = $(basename $@)
+$(pkgtgz): HEAD = v$(VERSION)
+$(pkgtgz): manifest fix-perms
+        @test -n "$(distdir)"
+        $(RM) -r $(distdir)
+        mkdir -p $(distdir)
+        tar c `cat .manifest` | (cd $(distdir) && tar x)
+        cd pkg && tar c $(basename $(@F)) | gzip -9 > $(@F)+
+        mv $@+ $@
+
+package: $(pkgtgz) $(pkggem)
+
+test-release: verify package $(release_notes) $(release_changes)
+release: verify package $(release_notes) $(release_changes)
+        # make tgz release on RubyForge
+        rubyforge add_release -f -n $(release_notes) -a $(release_changes) \
+          $(rfproject) $(rfpackage) $(VERSION) $(pkgtgz)
+        # push gem to Gemcutter
+        gem push $(pkggem)
+        # in case of gem downloads from RubyForge releases page
+        -rubyforge add_file \
+          $(rfproject) $(rfpackage) $(VERSION) $(pkggem)
+else
+gem install-gem: GIT-VERSION-FILE
+        $(MAKE) $@ VERSION=$(GIT_VERSION)
+endif
+
+ext := ext/posix_mq/posix_mq_ext.$(DLEXT)
+ext/posix_mq/Makefile: ext/posix_mq/extconf.rb
+        cd $(@D) && $(RUBY) extconf.rb
+$(ext): $(wildcard $(addprefix ext/posix_mq/,*.c *.h)) ext/posix_mq/Makefile
+        $(MAKE) -C $(@D)
+
+all:: test
+
+build: $(ext)
+test: test-unit
+test-unit: build
+        $(RUBY) -I lib:ext/posix_mq test/test_posix_mq.rb
+
+.PHONY: .FORCE-GIT-VERSION-FILE doc manifest man test
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..ae5ee8f
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,16 @@
+posix_mq is copyrighted Free Software by all contributors, see logs in
+revision control for names and email addresses of all of them.
+
+You can redistribute it and/or modify it under either the terms of the GNU
+Lesser General Public License as published by the Free Software Foundation,
+version 3.0 {LGPLv3}[http://www.gnu.org/licenses/lgpl-3.0.txt] (see
+link:COPYING).
+
+posix_mq 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 Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU C Library; if not, write to the Free Software
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
diff --git a/README b/README
new file mode 100644
index 0000000..91279db
--- /dev/null
+++ b/README
@@ -0,0 +1,70 @@
+= posix_mq - POSIX Message Queues for Ruby
+
+POSIX message queues allow local processes to exchange data in the form
+of messages.  This API is distinct from that provided by System V
+message queues, but provides similar functionality.
+
+POSIX message queues may be implemented in the kernel for fast,
+low-latency communication between processes on the same machine.
+POSIX message queues are not intended to replace userspace,
+network-aware message queue implementations.
+
+== Features
+
+* Supports message notifications via signals.
+
+* Supports portable non-blocking operation.  Under Linux 2.6.6+ only,
+  POSIX_MQ objects may even be used with event notification mechanisms
+  such as IO.select.
+
+* Optional timeouts may be applied to send and receive operations.
+
+* Thread-safe under Ruby 1.9, releases GVL before blocking operations.
+
+* Documented library API
+
+* Includes a generic "posix-mq.rb" command-line tool with manpage.
+
+== Install
+
+Operating system support (or library emulation) for POSIX message queues
+is required.  Most modern GNU/Linux distributions support this
+out-of-the-box.
+
+If you're using a packaged Ruby distribution, make sure you have a C
+compiler and the matching Ruby development libraries and headers.
+
+If you plan on using the command-line client, a tarball installation
+starts up faster and is recommended.  Just grab the tarball from:
+
+http://bogomips.org/ruby_posix_mq/files/
+Unpack it, and run "ruby setup.rb"
+
+Otherwise, via RubyGems: gem install posix_mq
+
+== Development
+
+You can get the latest source via git from the following locations:
+
+  git://git.bogomips.org/ruby_posix_mq.git
+  git://repo.or.cz/ruby_posix_mq.git (mirror)
+
+You may browse the code from the web and download the latest snapshot
+tarballs here:
+
+* http://git.bogomips.org/cgit/ruby_posix_mq.git (cgit)
+* http://repo.or.cz/w/ruby_posix_mq.git (gitweb)
+
+Inline patches (from "git format-patch") to the mailing list are
+preferred because they allow code review and comments in the reply to
+the patch.
+
+We will adhere to mostly the same conventions for patch submissions as
+git itself.  See the Documentation/SubmittingPatches document
+distributed with git on on patch submission guidelines to follow.  Just
+don't email the git mailing list or maintainer with posix_mq patches.
+
+== Contact
+
+All feedback (bug reports, user/development discussion, patches, pull
+requests) go to the mailing list: mailto:ruby.posix.mq@librelist.com
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..97082f9
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,159 @@
+# -*- encoding: binary -*-
+
+# most tasks are in the GNUmakefile which offers better parallelism
+
+def tags
+  timefmt = '%Y-%m-%dT%H:%M:%SZ'
+  @tags ||= `git tag -l`.split(/\n/).map do |tag|
+    if %r{\Av[\d\.]+\z} =~ tag
+      header, subject, body = `git cat-file tag #{tag}`.split(/\n\n/, 3)
+      header = header.split(/\n/)
+      tagger = header.grep(/\Atagger /).first
+      body ||= "initial"
+      {
+        :time => Time.at(tagger.split(/ /)[-2].to_i).utc.strftime(timefmt),
+        :tagger_name => %r{^tagger ([^<]+)}.match(tagger)[1].strip,
+        :tagger_email => %r{<([^>]+)>}.match(tagger)[1].strip,
+        :id => `git rev-parse refs/tags/#{tag}`.chomp!,
+        :tag => tag,
+        :subject => subject,
+        :body => body,
+      }
+    end
+  end.compact.sort { |a,b| b[:time] <=> a[:time] }
+end
+
+cgit_url = "http://git.bogomips.org/cgit/ruby_posix_mq.git"
+git_url = ENV['GIT_URL'] || 'git://git.bogomips.org/ruby_posix_mq.git'
+web_url = "http://bogomips.org/ruby_posix_mq/"
+
+desc 'prints news as an Atom feed'
+task :news_atom do
+  require 'nokogiri'
+  new_tags = tags[0,10]
+  puts(Nokogiri::XML::Builder.new do
+    feed :xmlns => "http://www.w3.org/2005/Atom" do
+      id! "#{web_url}NEWS.atom.xml"
+      title "Ruby posix_mq news"
+      subtitle "POSIX Message Queues for Ruby"
+      link! :rel => "alternate", :type => "text/html",
+            :href => "#{web_url}NEWS.html"
+      updated(new_tags.empty? ? "1970-01-01T00:00:00Z" : new_tags.first[:time])
+      new_tags.each do |tag|
+        entry do
+          title tag[:subject]
+          updated tag[:time]
+          published tag[:time]
+          author {
+            name tag[:tagger_name]
+            email tag[:tagger_email]
+          }
+          url = "#{cgit_url}/tag/?id=#{tag[:tag]}"
+          link! :rel => "alternate", :type => "text/html", :href =>url
+          id! url
+          message_only = tag[:body].split(/\n.+\(\d+\):\n {6}/s).first.strip
+          content({:type =>:text}, message_only)
+          content(:type =>:xhtml) { pre tag[:body] }
+        end
+      end
+    end
+  end.to_xml)
+end
+
+desc 'prints RDoc-formatted news'
+task :news_rdoc do
+  tags.each do |tag|
+    time = tag[:time].tr!('T', ' ').gsub!(/:\d\dZ/, ' UTC')
+    puts "=== #{tag[:tag].sub(/^v/, '')} / #{time}"
+    puts ""
+
+    body = tag[:body]
+    puts tag[:body].gsub(/^/sm, "  ").gsub(/[ \t]+$/sm, "")
+    puts ""
+  end
+end
+
+desc "print release changelog for Rubyforge"
+task :release_changes do
+  version = ENV['VERSION'] or abort "VERSION= needed"
+  version = "v#{version}"
+  vtags = tags.map { |tag| tag[:tag] =~ /\Av/ and tag[:tag] }.sort
+  prev = vtags[vtags.index(version) - 1]
+  if prev
+    system('git', 'diff', '--stat', prev, version) or abort $?
+    puts ""
+    system('git', 'log', "#{prev}..#{version}") or abort $?
+  else
+    system('git', 'log', version) or abort $?
+  end
+end
+
+desc "print release notes for Rubyforge"
+task :release_notes do
+  require 'rubygems'
+
+  spec = Gem::Specification.load('posix_mq.gemspec')
+  puts spec.description.strip
+  puts ""
+  puts "* #{spec.homepage}"
+  puts "* #{spec.email}"
+  puts "* #{git_url}"
+
+  _, _, body = `git cat-file tag v#{spec.version}`.split(/\n\n/, 3)
+  print "\nChanges:\n\n"
+  puts body
+end
+
+desc "read news article from STDIN and post to rubyforge"
+task :publish_news do
+  require 'rubyforge'
+  IO.select([STDIN], nil, nil, 1) or abort "E: news must be read from stdin"
+  msg = STDIN.readlines
+  subject = msg.shift
+  blank = msg.shift
+  blank == "\n" or abort "no newline after subject!"
+  subject.strip!
+  body = msg.join("").strip!
+
+  rf = RubyForge.new.configure
+  rf.login
+  rf.post_news('qrp', subject, body)
+end
+
+desc "post to RAA"
+task :raa_update do
+  require 'rubygems'
+  require 'net/http'
+  require 'net/netrc'
+  rc = Net::Netrc.locate('ruby_posix_mq-raa') or abort "~/.netrc not found"
+  password = rc.password
+
+  s = Gem::Specification.load('posix_mq.gemspec')
+  desc = [ s.description.strip ]
+  desc << ""
+  desc << "* #{s.email}"
+  desc << "* #{git_url}"
+  desc << "* #{cgit_url}"
+  desc = desc.join("\n")
+  uri = URI.parse('http://raa.ruby-lang.org/regist.rhtml')
+  form = {
+    :name => s.name,
+    :short_description => s.summary,
+    :version => s.version.to_s,
+    :status => 'experimental',
+    :owner => s.authors.first,
+    :email => s.email,
+    :category_major => 'Library',
+    :category_minor => 'System',
+    :url => s.homepage,
+    :download => 'http://rubyforge.org/frs/?group_id=5626',
+    :license => 'LGPLv3',
+    :description_style => 'Plain',
+    :description => desc,
+    :pass => password,
+    :submit => 'Update',
+  }
+  res = Net::HTTP.post_form(uri, form)
+  p res
+  puts res.body
+end
diff --git a/bin/posix-mq.rb b/bin/posix-mq.rb
new file mode 100755
index 0000000..fa44b94
--- /dev/null
+++ b/bin/posix-mq.rb
@@ -0,0 +1,138 @@
+#!/usr/bin/ruby
+# -*- encoding: binary -*-
+Encoding.default_external = Encoding::BINARY if defined?(Encoding)
+$stderr.sync = $stdout.sync = true
+
+require 'posix_mq'
+require 'optparse'
+
+commands = %w(create attr send receive wait unlink)
+usage = "Usage: MQUEUE=/name #{File.basename($0)} COMMAND " \
+        "[options] [<arguments>]\n" \
+        "COMMAND may be one of: #{commands.join(', ')}"
+
+mqueue = ENV["MQUEUE"] or abort usage
+command = ARGV.shift or abort usage
+commands.include?(command) or abort usage
+
+priority = nil
+timeout = nil
+mode = 0666
+oflags = IO::RDONLY
+mq_attr = nil
+nonblock = false
+command = command.to_sym
+
+ARGV.options do |x|
+  x.banner = usage.split(/\n/).first.gsub(/COMMAND/, command.to_s)
+  x.separator ''
+
+  case command
+  when :create
+    oflags |= IO::CREAT
+    x.on('-x', '--exclusive', "exclusive create") {
+      oflags |= IO::EXCL
+    }
+    x.on('-m', '--mode=MODE', "octal file mode") { |i|
+      mode = i.to_i(8)
+    }
+    x.on('-c', '--maxmsg=COUNT', Integer, "maximum number of messages") { |i|
+      mq_attr ||= POSIX_MQ::Attr.new
+      mq_attr.maxmsg = i
+    }
+    x.on('-s', '--msgsize=BYTES', Integer, "maximum size of message") { |i|
+      mq_attr ||= POSIX_MQ::Attr.new
+      mq_attr.msgsize = i
+    }
+  when :wait
+    x.on('-t', '--timeout=SECONDS', Float, "timeout in seconds") { |f|
+      timeout = f
+    }
+  when :send, :receive
+    conflict = "timeout and nonblock are exclusive"
+    x.on('-t', '--timeout=SECONDS', Float, "timeout in seconds") { |f|
+      abort conflict if nonblock
+      timeout = f
+    }
+    x.on('-n', '--nonblock', "nonblocking operation") {
+      abort conflict if timeout
+      nonblock = true
+      oflags |= IO::NONBLOCK
+    }
+    if command == :send
+      oflags = IO::WRONLY
+      x.on('-p', '--priority=PRIO', Integer, "priority of message") { |i|
+        priority = i
+      }
+    else
+      x.on('-p', '--priority', "output priority of message to stderr") {
+        priority = $stderr
+      }
+    end
+  end
+  x.on('-q', "quiet warnings and errors") { $stderr.reopen("/dev/null", "w") }
+  x.on('-h', '--help', 'Show this help message.') { puts x; exit }
+  x.parse!
+end
+
+trap(:INT) { exit 130 }
+
+unless command == :send || ARGV.empty?
+  abort "#{command} accepts no arguments"
+end
+
+begin
+  if command == :create && mq_attr
+    mq_attr.flags = mq_attr.curmsgs = 0
+    mq_attr.msgsize && ! mq_attr.maxmsg and
+      abort "--maxmsg must be set with --msgsize"
+    mq_attr.maxmsg && ! mq_attr.msgsize and
+      abort "--msgsize must be set with --maxmsg"
+  elsif command == :unlink
+    POSIX_MQ.unlink(mqueue)
+    exit
+  end
+
+  mq = POSIX_MQ.open(mqueue, oflags, mode, mq_attr)
+  case command
+  when :create
+    exit
+  when :receive
+    buf, prio = mq.receive("", timeout)
+    $stderr.syswrite("priority=#{prio}\n") if priority
+    $stdout.syswrite(buf)
+  when :send
+    ARGV << $stdin.read if ARGV.empty?
+    ARGV.each { |msg| mq.send(msg, priority, timeout) }
+  when :attr
+    mq_attr = mq.attr
+    $stdout.syswrite(
+      "flags=#{mq_attr.flags}\n" \
+      "maxmsg=#{mq_attr.maxmsg}\n" \
+      "msgsize=#{mq_attr.msgsize}\n" \
+      "curmsgs=#{mq_attr.curmsgs}\n")
+  when :wait
+    trap(:USR1) { exit }
+
+    # we wouldn't get a notification if there were already messages
+    exit if mq.attr.curmsgs > 0
+    mq.notify = :USR1
+    exit if mq.attr.curmsgs > 0 # avoid race condition
+
+    timeout.nil? ? sleep : sleep(timeout)
+    exit 2 # timed out
+  end
+rescue Errno::EEXIST
+  abort "Queue exists"
+rescue Errno::ENOENT
+  abort "Queue does not exist"
+rescue Errno::EMSGSIZE
+  abort "Message too long"
+rescue Errno::EAGAIN
+  abort(command == :send ? "Queue full" : "No messages available")
+rescue Errno::ETIMEDOUT
+  warn "Operation timed out"
+  exit 2
+rescue => e
+  abort e.message
+end
diff --git a/ext/posix_mq/extconf.rb b/ext/posix_mq/extconf.rb
new file mode 100644
index 0000000..b45cff6
--- /dev/null
+++ b/ext/posix_mq/extconf.rb
@@ -0,0 +1,9 @@
+require "mkmf"
+
+have_header("mqueue.h") or abort "mqueue.h header missing"
+have_func("rb_str_set_len")
+have_func("rb_struct_alloc_noinit")
+have_func('rb_thread_blocking_region')
+have_library("rt")
+dir_config("posix_mq")
+create_makefile("posix_mq_ext")
diff --git a/ext/posix_mq/posix_mq.c b/ext/posix_mq/posix_mq.c
new file mode 100644
index 0000000..e64cac3
--- /dev/null
+++ b/ext/posix_mq/posix_mq.c
@@ -0,0 +1,813 @@
+#define _XOPEN_SOURCE 600
+#include <ruby.h>
+
+#include <time.h>
+#include <mqueue.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <assert.h>
+#include <unistd.h>
+
+#if defined(__linux__)
+#  define MQD_IS_FD 1
+#  define MQ_IO_MARK(mq) rb_gc_mark((mq)->io)
+#  define MQ_IO_SET(mq,val) do { (mq)->io = (val); } while (0)
+#else
+#  warning mqd_t is not select()-able on your OS
+#  define MQD_IS_FD 0
+#  define MQ_IO_MARK(mq) ((void)(0))
+#  define MQ_IO_SET(mq,val) ((void)(0))
+#endif /* non-Linux */
+
+struct posix_mq {
+        mqd_t des;
+        long msgsize;
+        VALUE name;
+#if MQD_IS_FD
+        VALUE io;
+#endif
+};
+
+static VALUE cPOSIX_MQ, cAttr;
+static ID id_new;
+static ID sym_r, sym_w, sym_rw;
+static const mqd_t MQD_INVALID = (mqd_t)-1;
+
+/* Ruby 1.8.6+ macros (for compatibility with Ruby 1.9) */
+#ifndef RSTRING_PTR
+#  define RSTRING_PTR(s) (RSTRING(s)->ptr)
+#endif
+#ifndef RSTRING_LEN
+#  define RSTRING_LEN(s) (RSTRING(s)->len)
+#endif
+#ifndef RSTRUCT_PTR
+#  define RSTRUCT_PTR(s) (RSTRUCT(s)->ptr)
+#endif
+#ifndef RSTRUCT_LEN
+#  define RSTRUCT_LEN(s) (RSTRUCT(s)->len)
+#endif
+
+#ifndef HAVE_RB_STR_SET_LEN
+#  ifdef RUBINIUS
+#    define rb_str_set_len(str,len) rb_str_resize(str,len)
+#  else /* 1.8.6 optimized version */
+/* this is taken from Ruby 1.8.7, 1.8.6 may not have it */
+static void rb_18_str_set_len(VALUE str, long len)
+{
+        RSTRING(str)->len = len;
+        RSTRING(str)->ptr[len] = '\0';
+        rb_str_flush(str);
+}
+#    define rb_str_set_len(str,len) rb_18_str_set_len(str,len)
+#  endif /* ! RUBINIUS */
+#endif /* !defined(HAVE_RB_STR_SET_LEN) */
+
+#ifndef HAVE_RB_STRUCT_ALLOC_NOINIT
+static VALUE rb_struct_alloc_noinit(VALUE class)
+{
+        return rb_funcall(class, id_new, 0, 0);
+}
+#endif /* !defined(HAVE_RB_STRUCT_ALLOC_NOINIT) */
+
+/* partial emulation of the 1.9 rb_thread_blocking_region under 1.8 */
+#ifndef HAVE_RB_THREAD_BLOCKING_REGION
+#  include <rubysig.h>
+#  define RUBY_UBF_IO ((rb_unblock_function_t *)-1)
+typedef void rb_unblock_function_t(void *);
+typedef VALUE rb_blocking_function_t(void *);
+static VALUE
+rb_thread_blocking_region(
+        rb_blocking_function_t *func, void *data1,
+        rb_unblock_function_t *ubf, void *data2)
+{
+        VALUE rv;
+
+        assert(RUBY_UBF_IO == ubf && "RUBY_UBF_IO required for emulation");
+
+        TRAP_BEG;
+        rv = func(data1);
+        TRAP_END;
+
+        return rv;
+}
+#endif /* ! HAVE_RB_THREAD_BLOCKING_REGION */
+
+/* used to pass arguments to mq_open inside blocking region */
+struct open_args {
+        int argc;
+        const char *name;
+        int oflags;
+        mode_t mode;
+        struct mq_attr attr;
+};
+
+/* used to pass arguments to mq_send/mq_receive inside blocking region */
+struct rw_args {
+        mqd_t des;
+        char *msg_ptr;
+        size_t msg_len;
+        unsigned msg_prio;
+        struct timespec *timeout;
+};
+
+/* hope it's there..., TODO: a better version that works in rbx */
+struct timeval rb_time_interval(VALUE);
+
+static struct timespec *convert_timeout(struct timespec *dest, VALUE time)
+{
+        struct timeval tv, now;
+
+        if (NIL_P(time))
+                return NULL;
+
+        tv = rb_time_interval(time); /* aggregate return :( */
+        gettimeofday(&now, NULL);
+        dest->tv_sec = now.tv_sec + tv.tv_sec;
+        dest->tv_nsec = (now.tv_usec + tv.tv_usec) * 1000;
+
+        if (dest->tv_nsec > 1000000000) {
+                dest->tv_nsec -= 1000000000;
+                dest->tv_sec++;
+        }
+
+        return dest;
+}
+
+/* runs without GVL */
+static VALUE xopen(void *ptr)
+{
+        struct open_args *x = ptr;
+        mqd_t rv;
+
+        switch (x->argc) {
+        case 2: rv = mq_open(x->name, x->oflags); break;
+        case 3: rv = mq_open(x->name, x->oflags, x->mode, NULL); break;
+        case 4: rv = mq_open(x->name, x->oflags, x->mode, &x->attr); break;
+        default: rv = MQD_INVALID;
+        }
+
+        return (VALUE)rv;
+}
+
+/* runs without GVL */
+static VALUE xsend(void *ptr)
+{
+        struct rw_args *x = ptr;
+
+        if (x->timeout)
+                return (VALUE)mq_timedsend(x->des, x->msg_ptr, x->msg_len,
+                                           x->msg_prio, x->timeout);
+
+        return (VALUE)mq_send(x->des, x->msg_ptr, x->msg_len, x->msg_prio);
+}
+
+/* runs without GVL */
+static VALUE xrecv(void *ptr)
+{
+        struct rw_args *x = ptr;
+
+        if (x->timeout)
+                return (VALUE)mq_timedreceive(x->des, x->msg_ptr, x->msg_len,
+                                              &x->msg_prio, x->timeout);
+
+        return (VALUE)mq_receive(x->des, x->msg_ptr, x->msg_len, &x->msg_prio);
+}
+
+/* runs without GVL, path resolution may be slow */
+static VALUE xunlink(void *ptr)
+{
+        VALUE name = (VALUE)ptr;
+
+        return (VALUE)mq_unlink(RSTRING_PTR(name));
+}
+
+/* called by GC */
+static void mark(void *ptr)
+{
+        struct posix_mq *mq = ptr;
+
+        rb_gc_mark(mq->name);
+        MQ_IO_MARK(mq);
+}
+
+/* called by GC */
+static void _free(void *ptr)
+{
+        struct posix_mq *mq = ptr;
+
+        if (mq->des != MQD_INVALID) {
+                /* we ignore errors when gc-ing */
+                int saved_errno = errno;
+
+                mq_close(mq->des);
+                errno = saved_errno;
+                mq->des = MQD_INVALID;
+        }
+}
+
+/* automatically called at creation (before initialize) */
+static VALUE alloc(VALUE klass)
+{
+        struct posix_mq *mq;
+        VALUE rv = Data_Make_Struct(klass, struct posix_mq, mark, _free, mq);
+
+        mq->des = MQD_INVALID;
+        mq->msgsize = -1;
+        mq->name = Qnil;
+        MQ_IO_SET(mq, Qnil);
+
+        return rv;
+}
+
+/* unwraps the posix_mq struct from self */
+static struct posix_mq *get(VALUE self, int need_valid)
+{
+        struct posix_mq *mq;
+
+        Data_Get_Struct(self, struct posix_mq, mq);
+
+        if (need_valid && mq->des == MQD_INVALID)
+                rb_raise(rb_eIOError, "closed queue descriptor");
+
+        return mq;
+}
+
+/* converts the POSIX_MQ::Attr astruct into a struct mq_attr attr */
+static void attr_from_struct(struct mq_attr *attr, VALUE astruct, int all)
+{
+        VALUE *ptr;
+
+        if (CLASS_OF(astruct) != cAttr)
+                rb_raise(rb_eArgError, "not a POSIX_MQ::Attr: %s",
+                         RSTRING_PTR(rb_inspect(astruct)));
+
+        ptr = RSTRUCT_PTR(astruct);
+
+        attr->mq_flags = NUM2LONG(ptr[0]);
+
+        if (all || !NIL_P(ptr[1]))
+                attr->mq_maxmsg = NUM2LONG(ptr[1]);
+        if (all || !NIL_P(ptr[2]))
+                attr->mq_msgsize = NUM2LONG(ptr[2]);
+        if (!NIL_P(ptr[3]))
+                attr->mq_curmsgs = NUM2LONG(ptr[3]);
+}
+
+/*
+ * call-seq:
+ *        POSIX_MQ.new(name [, flags [, mode [, mq_attr]])        => mq
+ *
+ * Opens a POSIX message queue given by +name+.  +name+ should start
+ * with a slash ("/") for portable applications.
+ *
+ * If a Symbol is given in place of integer +flags+, then:
+ *
+ * * +:r+ is equivalent to IO::RDONLY
+ * * +:w+ is equivalent to IO::CREAT|IO::WRONLY
+ * * +:rw+ is equivalent to IO::CREAT|IO::RDWR
+ *
+ * +mode+ is an integer and only used when IO::CREAT is used.
+ * +mq_attr+ is a POSIX_MQ::Attr and only used if IO::CREAT is used.
+ * If +mq_attr+ is not specified when creating a queue, then the
+ * system defaults will be used.
+ *
+ * See the manpage for mq_open(3) for more details on this function.
+ */
+static VALUE init(int argc, VALUE *argv, VALUE self)
+{
+        struct posix_mq *mq = get(self, 0);
+        struct open_args x;
+        VALUE name, oflags, mode, attr;
+
+        rb_scan_args(argc, argv, "13", &name, &oflags, &mode, &attr);
+
+        if (TYPE(name) != T_STRING)
+                rb_raise(rb_eArgError, "name must be a string");
+
+        switch (TYPE(oflags)) {
+        case T_NIL:
+                x.oflags = O_RDONLY;
+                break;
+        case T_SYMBOL:
+                if (oflags == sym_r)
+                        x.oflags = O_RDONLY;
+                else if (oflags == sym_w)
+                        x.oflags = O_CREAT|O_WRONLY;
+                else if (oflags == sym_rw)
+                        x.oflags = O_CREAT|O_RDWR;
+                else
+                        rb_raise(rb_eArgError,
+                                 "symbol must be :r, :w, or :rw: %s",
+                                 RSTRING_PTR(rb_inspect(oflags)));
+                break;
+        case T_BIGNUM:
+        case T_FIXNUM:
+                x.oflags = NUM2INT(oflags);
+                break;
+        default:
+                rb_raise(rb_eArgError, "flags must be an int, :r, :w, or :wr");
+        }
+
+        x.name = RSTRING_PTR(name);
+        x.argc = 2;
+
+        switch (TYPE(mode)) {
+        case T_FIXNUM:
+                x.argc = 3;
+                x.mode = NUM2INT(mode);
+                break;
+        case T_NIL:
+                if (x.oflags & O_CREAT) {
+                        x.argc = 3;
+                        x.mode = 0666;
+                }
+                break;
+        default:
+                rb_raise(rb_eArgError, "mode not an integer");
+        }
+
+        switch (TYPE(attr)) {
+        case T_STRUCT:
+                x.argc = 4;
+                attr_from_struct(&x.attr, attr, 1);
+
+                /* principle of least surprise */
+                if (x.attr.mq_flags & O_NONBLOCK)
+                        x.oflags |= O_NONBLOCK;
+                break;
+        case T_NIL:
+                break;
+        default:
+                rb_raise(rb_eArgError, "attr must be a POSIX_MQ::Attr: %s",
+                         RSTRING_PTR(rb_inspect(attr)));
+        }
+
+        mq->des = (mqd_t)rb_thread_blocking_region(xopen, &x, RUBY_UBF_IO, 0);
+        if (mq->des == MQD_INVALID)
+                rb_sys_fail("mq_open");
+
+        mq->name = rb_str_dup(name);
+
+        return self;
+}
+
+/*
+ * call-seq:
+ *        POSIX_MQ.unlink(name) =>        1
+ *
+ * Unlinks the message queue given by +name+.  The queue will be destroyed
+ * when the last process with the queue open closes its queue descriptors.
+ */
+static VALUE s_unlink(VALUE self, VALUE name)
+{
+        mqd_t rv;
+        void *ptr = (void *)name;
+
+        if (TYPE(name) != T_STRING)
+                rb_raise(rb_eArgError, "argument must be a string");
+
+        rv = (mqd_t)rb_thread_blocking_region(xunlink, ptr, RUBY_UBF_IO, 0);
+        if (rv == MQD_INVALID)
+                rb_sys_fail("mq_unlink");
+
+        return INT2NUM(1);
+}
+
+/*
+ * call-seq:
+ *        mq.unlink =>        mq
+ *
+ * Unlinks the message queue to prevent other processes from accessing it.
+ * All existing queue descriptors to this queue including those opened by
+ * other processes are unaffected.  The queue will only be destroyed
+ * when the last process with open descriptors to this queue closes
+ * the descriptors.
+ */
+static VALUE _unlink(VALUE self)
+{
+        struct posix_mq *mq = get(self, 0);
+        mqd_t rv;
+        void *ptr = (void *)mq->name;
+
+        assert(TYPE(mq->name) == T_STRING && "mq->name is not a string");
+
+        rv = (mqd_t)rb_thread_blocking_region(xunlink, ptr, RUBY_UBF_IO, 0);
+        if (rv == MQD_INVALID)
+                rb_sys_fail("mq_unlink");
+
+        return self;
+}
+
+static void setup_send_buffer(struct rw_args *x, VALUE buffer)
+{
+        buffer = rb_obj_as_string(buffer);
+        x->msg_ptr = RSTRING_PTR(buffer);
+        x->msg_len = (size_t)RSTRING_LEN(buffer);
+}
+
+/*
+ * call-seq:
+ *        mq.send(string [,priority[, timeout]])        => nil
+ *
+ * Inserts the given +string+ into the message queue with an optional,
+ * unsigned integer +priority+.  If the optional +timeout+ is specified,
+ * then Errno::ETIMEDOUT will be raised if the operation cannot complete
+ * before +timeout+ seconds has elapsed.  Without +timeout+, this method
+ * may block until the queue is writable.
+ */
+static VALUE _send(int argc, VALUE *argv, VALUE self)
+{
+        struct posix_mq *mq = get(self, 1);
+        struct rw_args x;
+        VALUE buffer, prio, timeout;
+        mqd_t rv;
+        struct timespec expire;
+
+        rb_scan_args(argc, argv, "12", &buffer, &prio, &timeout);
+
+        setup_send_buffer(&x, buffer);
+        x.des = mq->des;
+        x.timeout = convert_timeout(&expire, timeout);
+        x.msg_prio = NIL_P(prio) ? 0 : NUM2UINT(prio);
+
+        rv = (mqd_t)rb_thread_blocking_region(xsend, &x, RUBY_UBF_IO, 0);
+        if (rv == MQD_INVALID)
+                rb_sys_fail("mq_send");
+
+        return Qnil;
+}
+
+/*
+ * call-seq:
+ *        mq << string        => mq
+ *
+ * Inserts the given +string+ into the message queue with a
+ * default priority of 0 and no timeout.
+ */
+static VALUE send0(VALUE self, VALUE buffer)
+{
+        struct posix_mq *mq = get(self, 1);
+        struct rw_args x;
+        mqd_t rv;
+
+        setup_send_buffer(&x, buffer);
+        x.des = mq->des;
+        x.timeout = NULL;
+        x.msg_prio = 0;
+
+        rv = (mqd_t)rb_thread_blocking_region(xsend, &x, RUBY_UBF_IO, 0);
+        if (rv == MQD_INVALID)
+                rb_sys_fail("mq_send");
+
+        return self;
+}
+
+#if MQD_IS_FD
+/*
+ * call-seq:
+ *        mq.to_io        => IO
+ *
+ * Returns an IO.select-able +IO+ object.  This method is only available
+ * under Linux and is not intended to be portable.
+ */
+static VALUE to_io(VALUE self)
+{
+        struct posix_mq *mq = get(self, 1);
+
+        if (NIL_P(mq->io))
+                mq->io = rb_funcall(rb_cIO, id_new, 1, INT2NUM(mq->des));
+
+        return mq->io;
+}
+#endif
+
+static void get_msgsize(struct posix_mq *mq)
+{
+        struct mq_attr attr;
+
+        if (mq_getattr(mq->des, &attr) == MQD_INVALID)
+                rb_sys_fail("mq_getattr");
+
+        mq->msgsize = attr.mq_msgsize;
+}
+
+/*
+ * call-seq:
+ *        mq.receive([buffer, [timeout]])                => [ message, priority ]
+ *
+ * Takes the highest priority message off the queue and returns
+ * an array containing the message as a String and the Integer
+ * priority of the message.
+ *
+ * If the optional +buffer+ is present, then it must be a String
+ * which will receive the data.
+ *
+ * If the optional +timeout+ is present, then it may be a Float
+ * or Integer specifying the timeout in seconds.  Errno::ETIMEDOUT
+ * will be raised if +timeout+ has elapsed and there are no messages
+ * in the queue.
+ */
+static VALUE receive(int argc, VALUE *argv, VALUE self)
+{
+        struct posix_mq *mq = get(self, 1);
+        struct rw_args x;
+        VALUE buffer, timeout;
+        ssize_t r;
+        struct timespec expire;
+
+        if (mq->msgsize < 0)
+                get_msgsize(mq);
+
+        rb_scan_args(argc, argv, "02", &buffer, &timeout);
+        x.timeout = convert_timeout(&expire, timeout);
+
+        if (NIL_P(buffer)) {
+                buffer = rb_str_new(0, mq->msgsize);
+        } else {
+                StringValue(buffer);
+                rb_str_modify(buffer);
+                rb_str_resize(buffer, mq->msgsize);
+        }
+        OBJ_TAINT(buffer);
+        x.msg_ptr = RSTRING_PTR(buffer);
+        x.msg_len = (size_t)mq->msgsize;
+        x.des = mq->des;
+
+        r = (ssize_t)rb_thread_blocking_region(xrecv, &x, RUBY_UBF_IO, 0);
+        if (r < 0)
+                rb_sys_fail("mq_receive");
+
+        rb_str_set_len(buffer, r);
+
+        return rb_ary_new3(2, buffer, UINT2NUM(x.msg_prio));
+}
+
+/*
+ * call-seq:
+ *        mq.attr        =>         mq_attr
+ *
+ * Returns a POSIX_MQ::Attr struct containing the attributes
+ * of the message queue.  See the mq_getattr(3) manpage for
+ * more details.
+ */
+static VALUE getattr(VALUE self)
+{
+        struct posix_mq *mq = get(self, 1);
+        struct mq_attr attr;
+        VALUE astruct;
+        VALUE *ptr;
+
+        if (mq_getattr(mq->des, &attr) == MQD_INVALID)
+                rb_sys_fail("mq_getattr");
+
+        astruct = rb_struct_alloc_noinit(cAttr);
+        ptr = RSTRUCT_PTR(astruct);
+        ptr[0] = LONG2NUM(attr.mq_flags);
+        ptr[1] = LONG2NUM(attr.mq_maxmsg);
+        ptr[2] = LONG2NUM(attr.mq_msgsize);
+        ptr[3] = LONG2NUM(attr.mq_curmsgs);
+
+        return astruct;
+}
+
+/*
+ * call-seq:
+ *        mq.attr = POSIX_MQ::Attr(IO::NONBLOCK)                => mq_attr
+ *
+ * Only the IO::NONBLOCK flag may be set or unset (zero) in this manner.
+ * See the mq_setattr(3) manpage for more details.
+ *
+ * Consider using the POSIX_MQ#nonblock= method as it is easier and
+ * more natural to use.
+ */
+static VALUE setattr(VALUE self, VALUE astruct)
+{
+        struct posix_mq *mq = get(self, 1);
+        struct mq_attr newattr;
+
+        attr_from_struct(&newattr, astruct, 0);
+
+        if (mq_setattr(mq->des, &newattr, NULL) == MQD_INVALID)
+                rb_sys_fail("mq_setattr");
+
+        return astruct;
+}
+
+/*
+ * call-seq:
+ *        mq.close        => nil
+ *
+ * Closes the underlying message queue descriptor.
+ * If this descriptor had a registered notification request, the request
+ * will be removed so another descriptor or process may register a
+ * notification request.  Message queue descriptors are automatically
+ * closed by garbage collection.
+ */
+static VALUE _close(VALUE self)
+{
+        struct posix_mq *mq = get(self, 1);
+
+        if (mq_close(mq->des) == MQD_INVALID)
+                rb_sys_fail("mq_close");
+
+        mq->des = MQD_INVALID;
+        MQ_IO_SET(mq, Qnil);
+
+        return Qnil;
+}
+
+/*
+ *  call-seq:
+ *        mq.closed?        => true or false
+ *
+ *  Returns +true+ if the message queue descriptor is closed and therefore
+ *  unusable, otherwise +false+
+ */
+static VALUE closed(VALUE self)
+{
+        struct posix_mq *mq = get(self, 0);
+
+        return mq->des == MQD_INVALID ? Qtrue : Qfalse;
+}
+
+/*
+ * call-seq:
+ *        mq.name                => string
+ *
+ * Returns the string name of message queue associated with +mq+
+ */
+static VALUE name(VALUE self)
+{
+        struct posix_mq *mq = get(self, 0);
+
+        return mq->name;
+}
+
+static int lookup_sig(VALUE sig)
+{
+        static VALUE list;
+        const char *ptr;
+        long len;
+
+        sig = rb_obj_as_string(sig);
+        len = RSTRING_LEN(sig);
+        ptr = RSTRING_PTR(sig);
+
+        if (len > 3 && !memcmp("SIG", ptr, 3))
+                sig = rb_str_new(ptr + 3, len - 3);
+
+        if (!list) {
+                VALUE mSignal = rb_define_module("Signal"""); /* avoid RDoc */
+
+                list = rb_funcall(mSignal, rb_intern("list"), 0, 0);
+                rb_global_variable(&list);
+        }
+
+        sig = rb_hash_aref(list, sig);
+        if (NIL_P(sig))
+                rb_raise(rb_eArgError, "invalid signal: %s\n",
+                         RSTRING_PTR(rb_inspect(sig)));
+
+        return NUM2INT(sig);
+}
+
+/*
+ * call-seq:
+ *        mq.notify = signal        => signal
+ *
+ * Registers the notification request to deliver a given +signal+
+ * to the current process when message is received.
+ * If +signal+ is +nil+, it will unregister and disable the notification
+ * request to allow other processes to register a request.
+ * Only one process may have a notification request for a queue
+ * at a time, Errno::EBUSY will be raised if there is already
+ * a notification request registration for the queue.
+ */
+static VALUE setnotify(VALUE self, VALUE arg)
+{
+        struct posix_mq *mq = get(self, 1);
+        struct sigevent not;
+        VALUE rv = arg;
+
+        not.sigev_notify = SIGEV_SIGNAL;
+
+        switch (TYPE(arg)) {
+        case T_FIXNUM:
+                not.sigev_signo = NUM2INT(arg);
+                break;
+        case T_SYMBOL:
+        case T_STRING:
+                not.sigev_signo = lookup_sig(arg);
+                rv = INT2NUM(not.sigev_signo);
+                break;
+        case T_NIL:
+                not.sigev_notify = SIGEV_NONE;
+                break;
+        default:
+                /* maybe support Proc+thread via sigev_notify_function.. */
+                rb_raise(rb_eArgError, "must be a signal or nil");
+        }
+
+        if (mq_notify(mq->des, &not) == MQD_INVALID)
+                rb_sys_fail("mq_notify");
+
+        return rv;
+}
+
+/*
+ * call-seq:
+ *        mq.nonblock?        => true or false
+ *
+ * Returns the current non-blocking state of the message queue descriptor.
+ */
+static VALUE getnonblock(VALUE self)
+{
+        struct mq_attr attr;
+        struct posix_mq *mq = get(self, 1);
+
+        if (mq_getattr(mq->des, &attr) == MQD_INVALID)
+                rb_sys_fail("mq_getattr");
+
+        mq->msgsize = attr.mq_msgsize; /* optimization */
+
+        return attr.mq_flags & O_NONBLOCK ? Qtrue : Qfalse;
+}
+
+/*
+ * call-seq:
+ *        mq.nonblock = boolean        => boolean
+ *
+ * Enables or disables non-blocking operation for the message queue
+ * descriptor.  Errno::EAGAIN will be raised in situations where
+ * the queue would block.  This is not compatible with +timeout+
+ * arguments to POSIX_MQ#send and POSIX_MQ#receive.
+ */
+static VALUE setnonblock(VALUE self, VALUE nb)
+{
+        struct mq_attr newattr, oldattr;
+        struct posix_mq *mq = get(self, 1);
+
+        if (nb == Qtrue)
+                newattr.mq_flags = O_NONBLOCK;
+        else if (nb == Qfalse)
+                newattr.mq_flags = 0;
+        else
+                rb_raise(rb_eArgError, "must be true or false");
+
+        if (mq_setattr(mq->des, &newattr, &oldattr) == MQD_INVALID)
+                rb_sys_fail("mq_setattr");
+
+        mq->msgsize = oldattr.mq_msgsize; /* optimization */
+
+        return nb;
+}
+
+void Init_posix_mq_ext(void)
+{
+        cPOSIX_MQ = rb_define_class("POSIX_MQ", rb_cObject);
+        rb_define_alloc_func(cPOSIX_MQ, alloc);
+        cAttr = rb_const_get(cPOSIX_MQ, rb_intern("Attr"));
+
+        /*
+         * The maximum number of open message descriptors supported
+         * by the system.  This may be -1, in which case it is dynamically
+         * set at runtime.  Consult your operating system documentation
+         * for system-specific information about this.
+         */
+        rb_define_const(cPOSIX_MQ, "OPEN_MAX",
+                        LONG2NUM(sysconf(_SC_MQ_OPEN_MAX)));
+
+        /*
+         * The maximum priority that may be specified for POSIX_MQ#send
+         * On POSIX-compliant systems, this is at least 31, but some
+         * systems allow higher limits.
+         * The minimum priority is always zero.
+         */
+        rb_define_const(cPOSIX_MQ, "PRIO_MAX",
+                        LONG2NUM(sysconf(_SC_MQ_PRIO_MAX)));
+
+        rb_define_singleton_method(cPOSIX_MQ, "unlink", s_unlink, 1);
+
+        rb_define_method(cPOSIX_MQ, "initialize", init, -1);
+        rb_define_method(cPOSIX_MQ, "send", _send, -1);
+        rb_define_method(cPOSIX_MQ, "<<", send0, 1);
+        rb_define_method(cPOSIX_MQ, "receive", receive, -1);
+        rb_define_method(cPOSIX_MQ, "attr", getattr, 0);
+        rb_define_method(cPOSIX_MQ, "attr=", setattr, 1);
+        rb_define_method(cPOSIX_MQ, "close", _close, 0);
+        rb_define_method(cPOSIX_MQ, "closed?", closed, 0);
+        rb_define_method(cPOSIX_MQ, "unlink", _unlink, 0);
+        rb_define_method(cPOSIX_MQ, "name", name, 0);
+        rb_define_method(cPOSIX_MQ, "notify=", setnotify, 1);
+        rb_define_method(cPOSIX_MQ, "nonblock=", setnonblock, 1);
+        rb_define_method(cPOSIX_MQ, "nonblock?", getnonblock, 0);
+#if MQD_IS_FD
+        rb_define_method(cPOSIX_MQ, "to_io", to_io, 0);
+#endif
+
+        id_new = rb_intern("new");
+        sym_r = ID2SYM(rb_intern("r"));
+        sym_w = ID2SYM(rb_intern("w"));
+        sym_rw = ID2SYM(rb_intern("rw"));
+}
diff --git a/lib/posix_mq.rb b/lib/posix_mq.rb
new file mode 100644
index 0000000..a2a85ee
--- /dev/null
+++ b/lib/posix_mq.rb
@@ -0,0 +1,34 @@
+# -*- encoding: binary -*-
+class POSIX_MQ
+
+  # version of POSIX_MQ, currently 0.1.0
+  VERSION = '0.1.0'
+
+  # An analogous Struct to "struct mq_attr" in C.
+  # This may be used in arguments for POSIX_MQ.new and
+  # POSIX_MQ#attr=.  POSIX_MQ#attr returns an instance
+  # of this class.
+  #
+  # See the mq_getattr(3) manpage for more information on the values.
+  Attr = Struct.new(:flags, :maxmsg, :msgsize, :curmsgs)
+
+  class << self
+
+    # Opens a POSIX message queue and performs operations on the
+    # given block, closing the message queue at exit.
+    # All all arguments are passed to POSIX_MQ.new.
+    def open(*args)
+      mq = new(*args)
+      block_given? or return mq
+      begin
+        yield mq
+      ensure
+        mq.close unless mq.closed?
+      end
+    end
+
+  end
+
+end
+
+require 'posix_mq_ext'
diff --git a/local.mk.sample b/local.mk.sample
new file mode 100644
index 0000000..4ce6cf8
--- /dev/null
+++ b/local.mk.sample
@@ -0,0 +1,70 @@
+# this is a sample local.mk file, feel free to modify it for your needs
+# GNUmakefile will source local.mk in the top-level source tree
+# if it is present.
+#
+# This is depends on a bunch of GNU-isms from bash, touch.
+
+RSYNC = rsync
+DLEXT := so
+gems :=
+
+# Avoid loading rubygems to speed up tests because gmake is
+# fork+exec heavy with Ruby.
+prefix = $(HOME)
+ifeq ($(r19),)
+  RUBY := $(prefix)/bin/ruby
+  gem_paths := $(addprefix $(prefix)/lib/ruby/gems/1.8/gems/,$(gems))
+else
+  prefix := $(prefix)/ruby-1.9
+  export PATH := $(prefix)/bin:$(PATH)
+  RUBY := $(prefix)/bin/ruby --disable-gems
+  gem_paths := $(addprefix $(prefix)/lib/ruby/gems/1.9.1/gems/,$(gems))
+endif
+
+ifdef gem_paths
+  sp :=
+  sp +=
+  export RUBYLIB := $(subst $(sp),:,$(addsuffix /lib,$(gem_paths)))
+endif
+
+# pipefail is THE reason to use bash (v3+) or never revisions of ksh93
+# SHELL := /bin/bash -e -o pipefail
+SHELL := /bin/ksh93 -e -o pipefail
+
+# trace execution of tests
+# TRACER = strace -f -o $(t_pfx).strace -s 100000
+TRACER = /usr/bin/time -v -o $(t_pfx).time
+
+full-test: test-18 test-19
+test-18:
+        $(MAKE) test 2>&1 | sed -e 's!^!1.8 !'
+test-19:
+        $(MAKE) test r19=t 2>&1 | sed -e 's!^!1.9 !'
+
+latest: NEWS
+        @awk 'BEGIN{RS="=== ";ORS=""}NR==2{sub(/\n$$/,"");print RS""$$0 }' $<
+
+# publishes docs to http://bogomips.org/ruby_posix_mq/
+publish_doc:
+        -git set-file-times
+        $(RM) -r doc ChangeLog NEWS
+        $(MAKE) doc LOG_VERSION=$(shell git tag -l | tail -1)
+        $(MAKE) -s latest > doc/LATEST
+        find doc/images doc/js -type f | \
+                TZ=UTC xargs touch -d '1970-01-01 00:00:00' doc/rdoc.css
+        $(MAKE) doc_gz
+        chmod 644 $$(find doc -type f)
+        $(RSYNC) -av doc/ dcvr:/srv/bogomips/ruby_posix_mq/
+        git ls-files | xargs touch
+
+# Create gzip variants of the same timestamp as the original so nginx
+# "gzip_static on" can serve the gzipped versions directly.
+doc_gz: docs = $(shell find doc -type f ! -regex '^.*\.\(gif\|jpg\|png\|gz\)$$')
+doc_gz:
+        touch doc/NEWS.atom.xml -d "$$(awk 'NR==1{print $$4,$$5,$$6}' NEWS)"
+        for i in $(docs); do \
+          gzip --rsyncable -9 < $$i > $$i.gz; touch -r $$i $$i.gz; done
+
+# launches any of the following shells with RUBYLIB set
+irb sh bash ksh:
+        $@
diff --git a/posix_mq.gemspec b/posix_mq.gemspec
new file mode 100644
index 0000000..73c0a53
--- /dev/null
+++ b/posix_mq.gemspec
@@ -0,0 +1,39 @@
+# -*- encoding: binary -*-
+
+ENV["VERSION"] or abort "VERSION= must be specified"
+manifest = File.readlines('.manifest').map! { |x| x.chomp! }
+test_files = manifest.grep(%r{\Atest/test_.*\.rb\z})
+
+Gem::Specification.new do |s|
+  s.name = %q{posix_mq}
+  s.version = ENV["VERSION"]
+
+  s.authors = ["Ruby POSIX MQ hackers"]
+  s.date = Time.now.utc.strftime('%Y-%m-%d')
+  s.description = File.read("README").split(/\n\n/)[1]
+  s.email = %q{ruby.posix.mq@librelist.com}
+  s.executables = %w(posix-mq.rb)
+  s.extensions = %w(ext/posix_mq/extconf.rb)
+
+  s.extra_rdoc_files = File.readlines('.document').map! do |x|
+    x.chomp!
+    if File.directory?(x)
+      manifest.grep(%r{\A#{x}/})
+    elsif File.file?(x)
+      x
+    else
+      nil
+    end
+  end.flatten.compact
+
+  s.files = manifest
+  s.homepage = %q{http://bogomips.org/ruby_posix_mq/}
+  s.summary = %q{POSIX Message Queues for Ruby}
+  s.rdoc_options = [ "-Na", "-t", "posix_mq - #{s.summary}" ]
+  s.require_paths = %w(lib)
+  s.rubyforge_project = %q{qrp}
+
+  s.test_files = test_files
+
+  # s.licenses = %w(LGPLv3) # accessor not compatible with older RubyGems
+end
diff --git a/setup.rb b/setup.rb
new file mode 100644
index 0000000..5eb5006
--- /dev/null
+++ b/setup.rb
@@ -0,0 +1,1586 @@
+# -*- encoding: binary -*-
+#
+# setup.rb
+#
+# Copyright (c) 2000-2005 Minero Aoki
+#
+# This program is free software.
+# You can distribute/modify this program under the terms of
+# the GNU LGPL, Lesser General Public License version 2.1.
+#
+
+unless Enumerable.method_defined?(:map)   # Ruby 1.4.6
+  module Enumerable
+    alias map collect
+  end
+end
+
+unless File.respond_to?(:read)   # Ruby 1.6
+  def File.read(fname)
+    open(fname) {|f|
+      return f.read
+    }
+  end
+end
+
+unless Errno.const_defined?(:ENOTEMPTY)   # Windows?
+  module Errno
+    class ENOTEMPTY
+      # We do not raise this exception, implementation is not needed.
+    end
+  end
+end
+
+def File.binread(fname)
+  open(fname, 'rb') {|f|
+    return f.read
+  }
+end
+
+# for corrupted Windows' stat(2)
+def File.dir?(path)
+  File.directory?((path[-1,1] == '/') ? path : path + '/')
+end
+
+
+class ConfigTable
+
+  include Enumerable
+
+  def initialize(rbconfig)
+    @rbconfig = rbconfig
+    @items = []
+    @table = {}
+    # options
+    @install_prefix = nil
+    @config_opt = nil
+    @verbose = true
+    @no_harm = false
+  end
+
+  attr_accessor :install_prefix
+  attr_accessor :config_opt
+
+  attr_writer :verbose
+
+  def verbose?
+    @verbose
+  end
+
+  attr_writer :no_harm
+
+  def no_harm?
+    @no_harm
+  end
+
+  def [](key)
+    lookup(key).resolve(self)
+  end
+
+  def []=(key, val)
+    lookup(key).set val
+  end
+
+  def names
+    @items.map {|i| i.name }
+  end
+
+  def each(&block)
+    @items.each(&block)
+  end
+
+  def key?(name)
+    @table.key?(name)
+  end
+
+  def lookup(name)
+    @table[name] or setup_rb_error "no such config item: #{name}"
+  end
+
+  def add(item)
+    @items.push item
+    @table[item.name] = item
+  end
+
+  def remove(name)
+    item = lookup(name)
+    @items.delete_if {|i| i.name == name }
+    @table.delete_if {|name, i| i.name == name }
+    item
+  end
+
+  def load_script(path, inst = nil)
+    if File.file?(path)
+      MetaConfigEnvironment.new(self, inst).instance_eval File.read(path), path
+    end
+  end
+
+  def savefile
+    '.config'
+  end
+
+  def load_savefile
+    begin
+      File.foreach(savefile()) do |line|
+        k, v = *line.split(/=/, 2)
+        self[k] = v.strip
+      end
+    rescue Errno::ENOENT
+      setup_rb_error $!.message + "\n#{File.basename($0)} config first"
+    end
+  end
+
+  def save
+    @items.each {|i| i.value }
+    File.open(savefile(), 'w') {|f|
+      @items.each do |i|
+        f.printf "%s=%s\n", i.name, i.value if i.value? and i.value
+      end
+    }
+  end
+
+  def load_standard_entries
+    standard_entries(@rbconfig).each do |ent|
+      add ent
+    end
+  end
+
+  def standard_entries(rbconfig)
+    c = rbconfig
+
+    rubypath = File.join(c['bindir'], c['ruby_install_name'] + c['EXEEXT'])
+
+    major = c['MAJOR'].to_i
+    minor = c['MINOR'].to_i
+    teeny = c['TEENY'].to_i
+    version = "#{major}.#{minor}"
+
+    # ruby ver. >= 1.4.4?
+    newpath_p = ((major >= 2) or
+                 ((major == 1) and
+                  ((minor >= 5) or
+                   ((minor == 4) and (teeny >= 4)))))
+
+    if c['rubylibdir']
+      # V > 1.6.3
+      libruby         = "#{c['prefix']}/lib/ruby"
+      librubyver      = c['rubylibdir']
+      librubyverarch  = c['archdir']
+      siteruby        = c['sitedir']
+      siterubyver     = c['sitelibdir']
+      siterubyverarch = c['sitearchdir']
+    elsif newpath_p
+      # 1.4.4 <= V <= 1.6.3
+      libruby         = "#{c['prefix']}/lib/ruby"
+      librubyver      = "#{c['prefix']}/lib/ruby/#{version}"
+      librubyverarch  = "#{c['prefix']}/lib/ruby/#{version}/#{c['arch']}"
+      siteruby        = c['sitedir']
+      siterubyver     = "$siteruby/#{version}"
+      siterubyverarch = "$siterubyver/#{c['arch']}"
+    else
+      # V < 1.4.4
+      libruby         = "#{c['prefix']}/lib/ruby"
+      librubyver      = "#{c['prefix']}/lib/ruby/#{version}"
+      librubyverarch  = "#{c['prefix']}/lib/ruby/#{version}/#{c['arch']}"
+      siteruby        = "#{c['prefix']}/lib/ruby/#{version}/site_ruby"
+      siterubyver     = siteruby
+      siterubyverarch = "$siterubyver/#{c['arch']}"
+    end
+    parameterize = lambda {|path|
+      path.sub(/\A#{Regexp.quote(c['prefix'])}/, '$prefix')
+    }
+
+    if arg = c['configure_args'].split.detect {|arg| /--with-make-prog=/ =~ arg }
+      makeprog = arg.sub(/'/, '').split(/=/, 2)[1]
+    else
+      makeprog = 'make'
+    end
+
+    [
+      ExecItem.new('installdirs', 'std/site/home',
+                   'std: install under libruby; site: install under site_ruby; home: install under $HOME')\
+          {|val, table|
+            case val
+            when 'std'
+              table['rbdir'] = '$librubyver'
+              table['sodir'] = '$librubyverarch'
+            when 'site'
+              table['rbdir'] = '$siterubyver'
+              table['sodir'] = '$siterubyverarch'
+            when 'home'
+              setup_rb_error '$HOME was not set' unless ENV['HOME']
+              table['prefix'] = ENV['HOME']
+              table['rbdir'] = '$libdir/ruby'
+              table['sodir'] = '$libdir/ruby'
+            end
+          },
+      PathItem.new('prefix', 'path', c['prefix'],
+                   'path prefix of target environment'),
+      PathItem.new('bindir', 'path', parameterize.call(c['bindir']),
+                   'the directory for commands'),
+      PathItem.new('libdir', 'path', parameterize.call(c['libdir']),
+                   'the directory for libraries'),
+      PathItem.new('datadir', 'path', parameterize.call(c['datadir']),
+                   'the directory for shared data'),
+      PathItem.new('mandir', 'path', parameterize.call(c['mandir']),
+                   'the directory for man pages'),
+      PathItem.new('sysconfdir', 'path', parameterize.call(c['sysconfdir']),
+                   'the directory for system configuration files'),
+      PathItem.new('localstatedir', 'path', parameterize.call(c['localstatedir']),
+                   'the directory for local state data'),
+      PathItem.new('libruby', 'path', libruby,
+                   'the directory for ruby libraries'),
+      PathItem.new('librubyver', 'path', librubyver,
+                   'the directory for standard ruby libraries'),
+      PathItem.new('librubyverarch', 'path', librubyverarch,
+                   'the directory for standard ruby extensions'),
+      PathItem.new('siteruby', 'path', siteruby,
+          'the directory for version-independent aux ruby libraries'),
+      PathItem.new('siterubyver', 'path', siterubyver,
+                   'the directory for aux ruby libraries'),
+      PathItem.new('siterubyverarch', 'path', siterubyverarch,
+                   'the directory for aux ruby binaries'),
+      PathItem.new('rbdir', 'path', '$siterubyver',
+                   'the directory for ruby scripts'),
+      PathItem.new('sodir', 'path', '$siterubyverarch',
+                   'the directory for ruby extentions'),
+      PathItem.new('rubypath', 'path', rubypath,
+                   'the path to set to #! line'),
+      ProgramItem.new('rubyprog', 'name', rubypath,
+                      'the ruby program using for installation'),
+      ProgramItem.new('makeprog', 'name', makeprog,
+                      'the make program to compile ruby extentions'),
+      SelectItem.new('shebang', 'all/ruby/never', 'ruby',
+                     'shebang line (#!) editing mode'),
+      BoolItem.new('without-ext', 'yes/no', 'no',
+                   'does not compile/install ruby extentions')
+    ]
+  end
+  private :standard_entries
+
+  def load_multipackage_entries
+    multipackage_entries().each do |ent|
+      add ent
+    end
+  end
+
+  def multipackage_entries
+    [
+      PackageSelectionItem.new('with', 'name,name...', '', 'ALL',
+                               'package names that you want to install'),
+      PackageSelectionItem.new('without', 'name,name...', '', 'NONE',
+                               'package names that you do not want to install')
+    ]
+  end
+  private :multipackage_entries
+
+  ALIASES = {
+    'std-ruby'         => 'librubyver',
+    'stdruby'          => 'librubyver',
+    'rubylibdir'       => 'librubyver',
+    'archdir'          => 'librubyverarch',
+    'site-ruby-common' => 'siteruby',     # For backward compatibility
+    'site-ruby'        => 'siterubyver',  # For backward compatibility
+    'bin-dir'          => 'bindir',
+    'bin-dir'          => 'bindir',
+    'rb-dir'           => 'rbdir',
+    'so-dir'           => 'sodir',
+    'data-dir'         => 'datadir',
+    'ruby-path'        => 'rubypath',
+    'ruby-prog'        => 'rubyprog',
+    'ruby'             => 'rubyprog',
+    'make-prog'        => 'makeprog',
+    'make'             => 'makeprog'
+  }
+
+  def fixup
+    ALIASES.each do |ali, name|
+      @table[ali] = @table[name]
+    end
+    @items.freeze
+    @table.freeze
+    @options_re = /\A--(#{@table.keys.join('|')})(?:=(.*))?\z/
+  end
+
+  def parse_opt(opt)
+    m = @options_re.match(opt) or setup_rb_error "config: unknown option #{opt}"
+    m.to_a[1,2]
+  end
+
+  def dllext
+    @rbconfig['DLEXT']
+  end
+
+  def value_config?(name)
+    lookup(name).value?
+  end
+
+  class Item
+    def initialize(name, template, default, desc)
+      @name = name.freeze
+      @template = template
+      @value = default
+      @default = default
+      @description = desc
+    end
+
+    attr_reader :name
+    attr_reader :description
+
+    attr_accessor :default
+    alias help_default default
+
+    def help_opt
+      "--#{@name}=#{@template}"
+    end
+
+    def value?
+      true
+    end
+
+    def value
+      @value
+    end
+
+    def resolve(table)
+      @value.gsub(%r<\$([^/]+)>) { table[$1] }
+    end
+
+    def set(val)
+      @value = check(val)
+    end
+
+    private
+
+    def check(val)
+      setup_rb_error "config: --#{name} requires argument" unless val
+      val
+    end
+  end
+
+  class BoolItem < Item
+    def config_type
+      'bool'
+    end
+
+    def help_opt
+      "--#{@name}"
+    end
+
+    private
+
+    def check(val)
+      return 'yes' unless val
+      case val
+      when /\Ay(es)?\z/i, /\At(rue)?\z/i then 'yes'
+      when /\An(o)?\z/i, /\Af(alse)\z/i  then 'no'
+      else
+        setup_rb_error "config: --#{@name} accepts only yes/no for argument"
+      end
+    end
+  end
+
+  class PathItem < Item
+    def config_type
+      'path'
+    end
+
+    private
+
+    def check(path)
+      setup_rb_error "config: --#{@name} requires argument"  unless path
+      path[0,1] == '$' ? path : File.expand_path(path)
+    end
+  end
+
+  class ProgramItem < Item
+    def config_type
+      'program'
+    end
+  end
+
+  class SelectItem < Item
+    def initialize(name, selection, default, desc)
+      super
+      @ok = selection.split('/')
+    end
+
+    def config_type
+      'select'
+    end
+
+    private
+
+    def check(val)
+      unless @ok.include?(val.strip)
+        setup_rb_error "config: use --#{@name}=#{@template} (#{val})"
+      end
+      val.strip
+    end
+  end
+
+  class ExecItem < Item
+    def initialize(name, selection, desc, &block)
+      super name, selection, nil, desc
+      @ok = selection.split('/')
+      @action = block
+    end
+
+    def config_type
+      'exec'
+    end
+
+    def value?
+      false
+    end
+
+    def resolve(table)
+      setup_rb_error "$#{name()} wrongly used as option value"
+    end
+
+    undef set
+
+    def evaluate(val, table)
+      v = val.strip.downcase
+      unless @ok.include?(v)
+        setup_rb_error "invalid option --#{@name}=#{val} (use #{@template})"
+      end
+      @action.call v, table
+    end
+  end
+
+  class PackageSelectionItem < Item
+    def initialize(name, template, default, help_default, desc)
+      super name, template, default, desc
+      @help_default = help_default
+    end
+
+    attr_reader :help_default
+
+    def config_type
+      'package'
+    end
+
+    private
+
+    def check(val)
+      unless File.dir?("packages/#{val}")
+        setup_rb_error "config: no such package: #{val}"
+      end
+      val
+    end
+  end
+
+  class MetaConfigEnvironment
+    def initialize(config, installer)
+      @config = config
+      @installer = installer
+    end
+
+    def config_names
+      @config.names
+    end
+
+    def config?(name)
+      @config.key?(name)
+    end
+
+    def bool_config?(name)
+      @config.lookup(name).config_type == 'bool'
+    end
+
+    def path_config?(name)
+      @config.lookup(name).config_type == 'path'
+    end
+
+    def value_config?(name)
+      @config.lookup(name).config_type != 'exec'
+    end
+
+    def add_config(item)
+      @config.add item
+    end
+
+    def add_bool_config(name, default, desc)
+      @config.add BoolItem.new(name, 'yes/no', default ? 'yes' : 'no', desc)
+    end
+
+    def add_path_config(name, default, desc)
+      @config.add PathItem.new(name, 'path', default, desc)
+    end
+
+    def set_config_default(name, default)
+      @config.lookup(name).default = default
+    end
+
+    def remove_config(name)
+      @config.remove(name)
+    end
+
+    # For only multipackage
+    def packages
+      raise '[setup.rb fatal] multi-package metaconfig API packages() called for single-package; contact application package vendor' unless @installer
+      @installer.packages
+    end
+
+    # For only multipackage
+    def declare_packages(list)
+      raise '[setup.rb fatal] multi-package metaconfig API declare_packages() called for single-package; contact application package vendor' unless @installer
+      @installer.packages = list
+    end
+  end
+
+end   # class ConfigTable
+
+
+# This module requires: #verbose?, #no_harm?
+module FileOperations
+
+  def mkdir_p(dirname, prefix = nil)
+    dirname = prefix + File.expand_path(dirname) if prefix
+    $stderr.puts "mkdir -p #{dirname}" if verbose?
+    return if no_harm?
+
+    # Does not check '/', it's too abnormal.
+    dirs = File.expand_path(dirname).split(%r<(?=/)>)
+    if /\A[a-z]:\z/i =~ dirs[0]
+      disk = dirs.shift
+      dirs[0] = disk + dirs[0]
+    end
+    dirs.each_index do |idx|
+      path = dirs[0..idx].join('')
+      Dir.mkdir path unless File.dir?(path)
+    end
+  end
+
+  def rm_f(path)
+    $stderr.puts "rm -f #{path}" if verbose?
+    return if no_harm?
+    force_remove_file path
+  end
+
+  def rm_rf(path)
+    $stderr.puts "rm -rf #{path}" if verbose?
+    return if no_harm?
+    remove_tree path
+  end
+
+  def remove_tree(path)
+    if File.symlink?(path)
+      remove_file path
+    elsif File.dir?(path)
+      remove_tree0 path
+    else
+      force_remove_file path
+    end
+  end
+
+  def remove_tree0(path)
+    Dir.foreach(path) do |ent|
+      next if ent == '.'
+      next if ent == '..'
+      entpath = "#{path}/#{ent}"
+      if File.symlink?(entpath)
+        remove_file entpath
+      elsif File.dir?(entpath)
+        remove_tree0 entpath
+      else
+        force_remove_file entpath
+      end
+    end
+    begin
+      Dir.rmdir path
+    rescue Errno::ENOTEMPTY
+      # directory may not be empty
+    end
+  end
+
+  def move_file(src, dest)
+    force_remove_file dest
+    begin
+      File.rename src, dest
+    rescue
+      File.open(dest, 'wb') {|f|
+        f.write File.binread(src)
+      }
+      File.chmod File.stat(src).mode, dest
+      File.unlink src
+    end
+  end
+
+  def force_remove_file(path)
+    begin
+      remove_file path
+    rescue
+    end
+  end
+
+  def remove_file(path)
+    File.chmod 0777, path
+    File.unlink path
+  end
+
+  def install(from, dest, mode, prefix = nil)
+    $stderr.puts "install #{from} #{dest}" if verbose?
+    return if no_harm?
+
+    realdest = prefix ? prefix + File.expand_path(dest) : dest
+    realdest = File.join(realdest, File.basename(from)) if File.dir?(realdest)
+    str = File.binread(from)
+    if diff?(str, realdest)
+      verbose_off {
+        rm_f realdest if File.exist?(realdest)
+      }
+      File.open(realdest, 'wb') {|f|
+        f.write str
+      }
+      File.chmod mode, realdest
+
+      File.open("#{objdir_root()}/InstalledFiles", 'a') {|f|
+        if prefix
+          f.puts realdest.sub(prefix, '')
+        else
+          f.puts realdest
+        end
+      }
+    end
+  end
+
+  def diff?(new_content, path)
+    return true unless File.exist?(path)
+    new_content != File.binread(path)
+  end
+
+  def command(*args)
+    $stderr.puts args.join(' ') if verbose?
+    system(*args) or raise RuntimeError,
+        "system(#{args.map{|a| a.inspect }.join(' ')}) failed"
+  end
+
+  def ruby(*args)
+    command config('rubyprog'), *args
+  end
+
+  def make(task = nil)
+    command(*[config('makeprog'), task].compact)
+  end
+
+  def extdir?(dir)
+    File.exist?("#{dir}/MANIFEST") or File.exist?("#{dir}/extconf.rb")
+  end
+
+  def files_of(dir)
+    Dir.open(dir) {|d|
+      return d.select {|ent| File.file?("#{dir}/#{ent}") }
+    }
+  end
+
+  DIR_REJECT = %w( . .. CVS SCCS RCS CVS.adm .svn )
+
+  def directories_of(dir)
+    Dir.open(dir) {|d|
+      return d.select {|ent| File.dir?("#{dir}/#{ent}") } - DIR_REJECT
+    }
+  end
+
+end
+
+
+# This module requires: #srcdir_root, #objdir_root, #relpath
+module HookScriptAPI
+
+  def get_config(key)
+    @config[key]
+  end
+
+  alias config get_config
+
+  # obsolete: use metaconfig to change configuration
+  def set_config(key, val)
+    @config[key] = val
+  end
+
+  #
+  # srcdir/objdir (works only in the package directory)
+  #
+
+  def curr_srcdir
+    "#{srcdir_root()}/#{relpath()}"
+  end
+
+  def curr_objdir
+    "#{objdir_root()}/#{relpath()}"
+  end
+
+  def srcfile(path)
+    "#{curr_srcdir()}/#{path}"
+  end
+
+  def srcexist?(path)
+    File.exist?(srcfile(path))
+  end
+
+  def srcdirectory?(path)
+    File.dir?(srcfile(path))
+  end
+
+  def srcfile?(path)
+    File.file?(srcfile(path))
+  end
+
+  def srcentries(path = '.')
+    Dir.open("#{curr_srcdir()}/#{path}") {|d|
+      return d.to_a - %w(. ..)
+    }
+  end
+
+  def srcfiles(path = '.')
+    srcentries(path).select {|fname|
+      File.file?(File.join(curr_srcdir(), path, fname))
+    }
+  end
+
+  def srcdirectories(path = '.')
+    srcentries(path).select {|fname|
+      File.dir?(File.join(curr_srcdir(), path, fname))
+    }
+  end
+
+end
+
+
+class ToplevelInstaller
+
+  Version   = '3.4.1'
+  Copyright = 'Copyright (c) 2000-2005 Minero Aoki'
+
+  TASKS = [
+    [ 'all',      'do config, setup, then install' ],
+    [ 'config',   'saves your configurations' ],
+    [ 'show',     'shows current configuration' ],
+    [ 'setup',    'compiles ruby extentions and others' ],
+    [ 'install',  'installs files' ],
+    [ 'test',     'run all tests in test/' ],
+    [ 'clean',    "does `make clean' for each extention" ],
+    [ 'distclean',"does `make distclean' for each extention" ]
+  ]
+
+  def ToplevelInstaller.invoke
+    config = ConfigTable.new(load_rbconfig())
+    config.load_standard_entries
+    config.load_multipackage_entries if multipackage?
+    config.fixup
+    klass = (multipackage?() ? ToplevelInstallerMulti : ToplevelInstaller)
+    klass.new(File.dirname($0), config).invoke
+  end
+
+  def ToplevelInstaller.multipackage?
+    File.dir?(File.dirname($0) + '/packages')
+  end
+
+  def ToplevelInstaller.load_rbconfig
+    if arg = ARGV.detect {|arg| /\A--rbconfig=/ =~ arg }
+      ARGV.delete(arg)
+      load File.expand_path(arg.split(/=/, 2)[1])
+      $".push 'rbconfig.rb'
+    else
+      require 'rbconfig'
+    end
+    ::Config::CONFIG
+  end
+
+  def initialize(ardir_root, config)
+    @ardir = File.expand_path(ardir_root)
+    @config = config
+    # cache
+    @valid_task_re = nil
+  end
+
+  def config(key)
+    @config[key]
+  end
+
+  def inspect
+    "#<#{self.class} #{__id__()}>"
+  end
+
+  def invoke
+    run_metaconfigs
+    case task = parsearg_global()
+    when nil, 'all'
+      parsearg_config
+      init_installers
+      exec_config
+      exec_setup
+      exec_install
+    else
+      case task
+      when 'config', 'test'
+        ;
+      when 'clean', 'distclean'
+        @config.load_savefile if File.exist?(@config.savefile)
+      else
+        @config.load_savefile
+      end
+      __send__ "parsearg_#{task}"
+      init_installers
+      __send__ "exec_#{task}"
+    end
+  end
+
+  def run_metaconfigs
+    @config.load_script "#{@ardir}/metaconfig"
+  end
+
+  def init_installers
+    @installer = Installer.new(@config, @ardir, File.expand_path('.'))
+  end
+
+  #
+  # Hook Script API bases
+  #
+
+  def srcdir_root
+    @ardir
+  end
+
+  def objdir_root
+    '.'
+  end
+
+  def relpath
+    '.'
+  end
+
+  #
+  # Option Parsing
+  #
+
+  def parsearg_global
+    while arg = ARGV.shift
+      case arg
+      when /\A\w+\z/
+        setup_rb_error "invalid task: #{arg}" unless valid_task?(arg)
+        return arg
+      when '-q', '--quiet'
+        @config.verbose = false
+      when '--verbose'
+        @config.verbose = true
+      when '--help'
+        print_usage $stdout
+        exit 0
+      when '--version'
+        puts "#{File.basename($0)} version #{Version}"
+        exit 0
+      when '--copyright'
+        puts Copyright
+        exit 0
+      else
+        setup_rb_error "unknown global option '#{arg}'"
+      end
+    end
+    nil
+  end
+
+  def valid_task?(t)
+    valid_task_re() =~ t
+  end
+
+  def valid_task_re
+    @valid_task_re ||= /\A(?:#{TASKS.map {|task,desc| task }.join('|')})\z/
+  end
+
+  def parsearg_no_options
+    unless ARGV.empty?
+      task = caller(0).first.slice(%r<`parsearg_(\w+)'>, 1)
+      setup_rb_error "#{task}: unknown options: #{ARGV.join(' ')}"
+    end
+  end
+
+  alias parsearg_show       parsearg_no_options
+  alias parsearg_setup      parsearg_no_options
+  alias parsearg_test       parsearg_no_options
+  alias parsearg_clean      parsearg_no_options
+  alias parsearg_distclean  parsearg_no_options
+
+  def parsearg_config
+    evalopt = []
+    set = []
+    @config.config_opt = []
+    while i = ARGV.shift
+      if /\A--?\z/ =~ i
+        @config.config_opt = ARGV.dup
+        break
+      end
+      name, value = *@config.parse_opt(i)
+      if @config.value_config?(name)
+        @config[name] = value
+      else
+        evalopt.push [name, value]
+      end
+      set.push name
+    end
+    evalopt.each do |name, value|
+      @config.lookup(name).evaluate value, @config
+    end
+    # Check if configuration is valid
+    set.each do |n|
+      @config[n] if @config.value_config?(n)
+    end
+  end
+
+  def parsearg_install
+    @config.no_harm = false
+    @config.install_prefix = ''
+    while a = ARGV.shift
+      case a
+      when '--no-harm'
+        @config.no_harm = true
+      when /\A--prefix=/
+        path = a.split(/=/, 2)[1]
+        path = File.expand_path(path) unless path[0,1] == '/'
+        @config.install_prefix = path
+      else
+        setup_rb_error "install: unknown option #{a}"
+      end
+    end
+  end
+
+  def print_usage(out)
+    out.puts 'Typical Installation Procedure:'
+    out.puts "  $ ruby #{File.basename $0} config"
+    out.puts "  $ ruby #{File.basename $0} setup"
+    out.puts "  # ruby #{File.basename $0} install (may require root privilege)"
+    out.puts
+    out.puts 'Detailed Usage:'
+    out.puts "  ruby #{File.basename $0} <global option>"
+    out.puts "  ruby #{File.basename $0} [<global options>] <task> [<task options>]"
+
+    fmt = "  %-24s %s\n"
+    out.puts
+    out.puts 'Global options:'
+    out.printf fmt, '-q,--quiet',   'suppress message outputs'
+    out.printf fmt, '   --verbose', 'output messages verbosely'
+    out.printf fmt, '   --help',    'print this message'
+    out.printf fmt, '   --version', 'print version and quit'
+    out.printf fmt, '   --copyright',  'print copyright and quit'
+    out.puts
+    out.puts 'Tasks:'
+    TASKS.each do |name, desc|
+      out.printf fmt, name, desc
+    end
+
+    fmt = "  %-24s %s [%s]\n"
+    out.puts
+    out.puts 'Options for CONFIG or ALL:'
+    @config.each do |item|
+      out.printf fmt, item.help_opt, item.description, item.help_default
+    end
+    out.printf fmt, '--rbconfig=path', 'rbconfig.rb to load',"running ruby's"
+    out.puts
+    out.puts 'Options for INSTALL:'
+    out.printf fmt, '--no-harm', 'only display what to do if given', 'off'
+    out.printf fmt, '--prefix=path',  'install path prefix', ''
+    out.puts
+  end
+
+  #
+  # Task Handlers
+  #
+
+  def exec_config
+    @installer.exec_config
+    @config.save   # must be final
+  end
+
+  def exec_setup
+    @installer.exec_setup
+  end
+
+  def exec_install
+    @installer.exec_install
+  end
+
+  def exec_test
+    @installer.exec_test
+  end
+
+  def exec_show
+    @config.each do |i|
+      printf "%-20s %s\n", i.name, i.value if i.value?
+    end
+  end
+
+  def exec_clean
+    @installer.exec_clean
+  end
+
+  def exec_distclean
+    @installer.exec_distclean
+  end
+
+end   # class ToplevelInstaller
+
+
+class ToplevelInstallerMulti < ToplevelInstaller
+
+  include FileOperations
+
+  def initialize(ardir_root, config)
+    super
+    @packages = directories_of("#{@ardir}/packages")
+    raise 'no package exists' if @packages.empty?
+    @root_installer = Installer.new(@config, @ardir, File.expand_path('.'))
+  end
+
+  def run_metaconfigs
+    @config.load_script "#{@ardir}/metaconfig", self
+    @packages.each do |name|
+      @config.load_script "#{@ardir}/packages/#{name}/metaconfig"
+    end
+  end
+
+  attr_reader :packages
+
+  def packages=(list)
+    raise 'package list is empty' if list.empty?
+    list.each do |name|
+      raise "directory packages/#{name} does not exist"\
+              unless File.dir?("#{@ardir}/packages/#{name}")
+    end
+    @packages = list
+  end
+
+  def init_installers
+    @installers = {}
+    @packages.each do |pack|
+      @installers[pack] = Installer.new(@config,
+                                       "#{@ardir}/packages/#{pack}",
+                                       "packages/#{pack}")
+    end
+    with    = extract_selection(config('with'))
+    without = extract_selection(config('without'))
+    @selected = @installers.keys.select {|name|
+                  (with.empty? or with.include?(name)) \
+                      and not without.include?(name)
+                }
+  end
+
+  def extract_selection(list)
+    a = list.split(/,/)
+    a.each do |name|
+      setup_rb_error "no such package: #{name}"  unless @installers.key?(name)
+    end
+    a
+  end
+
+  def print_usage(f)
+    super
+    f.puts 'Inluded packages:'
+    f.puts '  ' + @packages.sort.join(' ')
+    f.puts
+  end
+
+  #
+  # Task Handlers
+  #
+
+  def exec_config
+    run_hook 'pre-config'
+    each_selected_installers {|inst| inst.exec_config }
+    run_hook 'post-config'
+    @config.save   # must be final
+  end
+
+  def exec_setup
+    run_hook 'pre-setup'
+    each_selected_installers {|inst| inst.exec_setup }
+    run_hook 'post-setup'
+  end
+
+  def exec_install
+    run_hook 'pre-install'
+    each_selected_installers {|inst| inst.exec_install }
+    run_hook 'post-install'
+  end
+
+  def exec_test
+    run_hook 'pre-test'
+    each_selected_installers {|inst| inst.exec_test }
+    run_hook 'post-test'
+  end
+
+  def exec_clean
+    rm_f @config.savefile
+    run_hook 'pre-clean'
+    each_selected_installers {|inst| inst.exec_clean }
+    run_hook 'post-clean'
+  end
+
+  def exec_distclean
+    rm_f @config.savefile
+    run_hook 'pre-distclean'
+    each_selected_installers {|inst| inst.exec_distclean }
+    run_hook 'post-distclean'
+  end
+
+  #
+  # lib
+  #
+
+  def each_selected_installers
+    Dir.mkdir 'packages' unless File.dir?('packages')
+    @selected.each do |pack|
+      $stderr.puts "Processing the package `#{pack}' ..." if verbose?
+      Dir.mkdir "packages/#{pack}" unless File.dir?("packages/#{pack}")
+      Dir.chdir "packages/#{pack}"
+      yield @installers[pack]
+      Dir.chdir '../..'
+    end
+  end
+
+  def run_hook(id)
+    @root_installer.run_hook id
+  end
+
+  # module FileOperations requires this
+  def verbose?
+    @config.verbose?
+  end
+
+  # module FileOperations requires this
+  def no_harm?
+    @config.no_harm?
+  end
+
+end   # class ToplevelInstallerMulti
+
+
+class Installer
+
+  FILETYPES = %w( bin lib ext data conf man )
+
+  include FileOperations
+  include HookScriptAPI
+
+  def initialize(config, srcroot, objroot)
+    @config = config
+    @srcdir = File.expand_path(srcroot)
+    @objdir = File.expand_path(objroot)
+    @currdir = '.'
+  end
+
+  def inspect
+    "#<#{self.class} #{File.basename(@srcdir)}>"
+  end
+
+  def noop(rel)
+  end
+
+  #
+  # Hook Script API base methods
+  #
+
+  def srcdir_root
+    @srcdir
+  end
+
+  def objdir_root
+    @objdir
+  end
+
+  def relpath
+    @currdir
+  end
+
+  #
+  # Config Access
+  #
+
+  # module FileOperations requires this
+  def verbose?
+    @config.verbose?
+  end
+
+  # module FileOperations requires this
+  def no_harm?
+    @config.no_harm?
+  end
+
+  def verbose_off
+    begin
+      save, @config.verbose = @config.verbose?, false
+      yield
+    ensure
+      @config.verbose = save
+    end
+  end
+
+  #
+  # TASK config
+  #
+
+  def exec_config
+    exec_task_traverse 'config'
+  end
+
+  alias config_dir_bin noop
+  alias config_dir_lib noop
+
+  def config_dir_ext(rel)
+    extconf if extdir?(curr_srcdir())
+  end
+
+  alias config_dir_data noop
+  alias config_dir_conf noop
+  alias config_dir_man noop
+
+  def extconf
+    ruby "#{curr_srcdir()}/extconf.rb", *@config.config_opt
+  end
+
+  #
+  # TASK setup
+  #
+
+  def exec_setup
+    exec_task_traverse 'setup'
+  end
+
+  def setup_dir_bin(rel)
+    files_of(curr_srcdir()).each do |fname|
+      update_shebang_line "#{curr_srcdir()}/#{fname}"
+    end
+  end
+
+  alias setup_dir_lib noop
+
+  def setup_dir_ext(rel)
+    make if extdir?(curr_srcdir())
+  end
+
+  alias setup_dir_data noop
+  alias setup_dir_conf noop
+  alias setup_dir_man noop
+
+  def update_shebang_line(path)
+    return if no_harm?
+    return if config('shebang') == 'never'
+    old = Shebang.load(path)
+    if old
+      $stderr.puts "warning: #{path}: Shebang line includes too many args.  It is not portable and your program may not work." if old.args.size > 1
+      new = new_shebang(old)
+      return if new.to_s == old.to_s
+    else
+      return unless config('shebang') == 'all'
+      new = Shebang.new(config('rubypath'))
+    end
+    $stderr.puts "updating shebang: #{File.basename(path)}" if verbose?
+    open_atomic_writer(path) {|output|
+      File.open(path, 'rb') {|f|
+        f.gets if old   # discard
+        output.puts new.to_s
+        output.print f.read
+      }
+    }
+  end
+
+  def new_shebang(old)
+    if /\Aruby/ =~ File.basename(old.cmd)
+      Shebang.new(config('rubypath'), old.args)
+    elsif File.basename(old.cmd) == 'env' and old.args.first == 'ruby'
+      Shebang.new(config('rubypath'), old.args[1..-1])
+    else
+      return old unless config('shebang') == 'all'
+      Shebang.new(config('rubypath'))
+    end
+  end
+
+  def open_atomic_writer(path, &block)
+    tmpfile = File.basename(path) + '.tmp'
+    begin
+      File.open(tmpfile, 'wb', &block)
+      File.rename tmpfile, File.basename(path)
+    ensure
+      File.unlink tmpfile if File.exist?(tmpfile)
+    end
+  end
+
+  class Shebang
+    def Shebang.load(path)
+      line = nil
+      File.open(path) {|f|
+        line = f.gets
+      }
+      return nil unless /\A#!/ =~ line
+      parse(line)
+    end
+
+    def Shebang.parse(line)
+      cmd, *args = *line.strip.sub(/\A\#!/, '').split(' ')
+      new(cmd, args)
+    end
+
+    def initialize(cmd, args = [])
+      @cmd = cmd
+      @args = args
+    end
+
+    attr_reader :cmd
+    attr_reader :args
+
+    def to_s
+      "#! #{@cmd}" + (@args.empty? ? '' : " #{@args.join(' ')}")
+    end
+  end
+
+  #
+  # TASK install
+  #
+
+  def exec_install
+    rm_f 'InstalledFiles'
+    exec_task_traverse 'install'
+  end
+
+  def install_dir_bin(rel)
+    install_files targetfiles(), "#{config('bindir')}/#{rel}", 0755
+  end
+
+  def install_dir_lib(rel)
+    install_files libfiles(), "#{config('rbdir')}/#{rel}", 0644
+  end
+
+  def install_dir_ext(rel)
+    return unless extdir?(curr_srcdir())
+    install_files rubyextentions('.'),
+                  "#{config('sodir')}/#{File.dirname(rel)}",
+                  0555
+  end
+
+  def install_dir_data(rel)
+    install_files targetfiles(), "#{config('datadir')}/#{rel}", 0644
+  end
+
+  def install_dir_conf(rel)
+    # FIXME: should not remove current config files
+    # (rename previous file to .old/.org)
+    install_files targetfiles(), "#{config('sysconfdir')}/#{rel}", 0644
+  end
+
+  def install_dir_man(rel)
+    install_files targetfiles(), "#{config('mandir')}/#{rel}", 0644
+  end
+
+  def install_files(list, dest, mode)
+    mkdir_p dest, @config.install_prefix
+    list.each do |fname|
+      install fname, dest, mode, @config.install_prefix
+    end
+  end
+
+  def libfiles
+    glob_reject(%w(*.y *.output), targetfiles())
+  end
+
+  def rubyextentions(dir)
+    ents = glob_select("*.#{@config.dllext}", targetfiles())
+    if ents.empty?
+      setup_rb_error "no ruby extention exists: 'ruby #{$0} setup' first"
+    end
+    ents
+  end
+
+  def targetfiles
+    mapdir(existfiles() - hookfiles())
+  end
+
+  def mapdir(ents)
+    ents.map {|ent|
+      if File.exist?(ent)
+      then ent                         # objdir
+      else "#{curr_srcdir()}/#{ent}"   # srcdir
+      end
+    }
+  end
+
+  # picked up many entries from cvs-1.11.1/src/ignore.c
+  JUNK_FILES = %w(
+    core RCSLOG tags TAGS .make.state
+    .nse_depinfo #* .#* cvslog.* ,* .del-* *.olb
+    *~ *.old *.bak *.BAK *.orig *.rej _$* *$
+
+    *.org *.in .*
+  )
+
+  def existfiles
+    glob_reject(JUNK_FILES, (files_of(curr_srcdir()) | files_of('.')))
+  end
+
+  def hookfiles
+    %w( pre-%s post-%s pre-%s.rb post-%s.rb ).map {|fmt|
+      %w( config setup install clean ).map {|t| sprintf(fmt, t) }
+    }.flatten
+  end
+
+  def glob_select(pat, ents)
+    re = globs2re([pat])
+    ents.select {|ent| re =~ ent }
+  end
+
+  def glob_reject(pats, ents)
+    re = globs2re(pats)
+    ents.reject {|ent| re =~ ent }
+  end
+
+  GLOB2REGEX = {
+    '.' => '\.',
+    '$' => '\$',
+    '#' => '\#',
+    '*' => '.*'
+  }
+
+  def globs2re(pats)
+    /\A(?:#{
+      pats.map {|pat| pat.gsub(/[\.\$\#\*]/) {|ch| GLOB2REGEX[ch] } }.join('|')
+    })\z/
+  end
+
+  #
+  # TASK test
+  #
+
+  TESTDIR = 'test'
+
+  def exec_test
+    unless File.directory?('test')
+      $stderr.puts 'no test in this package' if verbose?
+      return
+    end
+    $stderr.puts 'Running tests...' if verbose?
+    begin
+      require 'test/unit'
+    rescue LoadError
+      setup_rb_error 'test/unit cannot loaded.  You need Ruby 1.8 or later to invoke this task.'
+    end
+    runner = Test::Unit::AutoRunner.new(true)
+    runner.to_run << TESTDIR
+    runner.run
+  end
+
+  #
+  # TASK clean
+  #
+
+  def exec_clean
+    exec_task_traverse 'clean'
+    rm_f @config.savefile
+    rm_f 'InstalledFiles'
+  end
+
+  alias clean_dir_bin noop
+  alias clean_dir_lib noop
+  alias clean_dir_data noop
+  alias clean_dir_conf noop
+  alias clean_dir_man noop
+
+  def clean_dir_ext(rel)
+    return unless extdir?(curr_srcdir())
+    make 'clean' if File.file?('Makefile')
+  end
+
+  #
+  # TASK distclean
+  #
+
+  def exec_distclean
+    exec_task_traverse 'distclean'
+    rm_f @config.savefile
+    rm_f 'InstalledFiles'
+  end
+
+  alias distclean_dir_bin noop
+  alias distclean_dir_lib noop
+
+  def distclean_dir_ext(rel)
+    return unless extdir?(curr_srcdir())
+    make 'distclean' if File.file?('Makefile')
+  end
+
+  alias distclean_dir_data noop
+  alias distclean_dir_conf noop
+  alias distclean_dir_man noop
+
+  #
+  # Traversing
+  #
+
+  def exec_task_traverse(task)
+    run_hook "pre-#{task}"
+    FILETYPES.each do |type|
+      if type == 'ext' and config('without-ext') == 'yes'
+        $stderr.puts 'skipping ext/* by user option' if verbose?
+        next
+      end
+      traverse task, type, "#{task}_dir_#{type}"
+    end
+    run_hook "post-#{task}"
+  end
+
+  def traverse(task, rel, mid)
+    dive_into(rel) {
+      run_hook "pre-#{task}"
+      __send__ mid, rel.sub(%r[\A.*?(?:/|\z)], '')
+      directories_of(curr_srcdir()).each do |d|
+        traverse task, "#{rel}/#{d}", mid
+      end
+      run_hook "post-#{task}"
+    }
+  end
+
+  def dive_into(rel)
+    return unless File.dir?("#{@srcdir}/#{rel}")
+
+    dir = File.basename(rel)
+    Dir.mkdir dir unless File.dir?(dir)
+    prevdir = Dir.pwd
+    Dir.chdir dir
+    $stderr.puts '---> ' + rel if verbose?
+    @currdir = rel
+    yield
+    Dir.chdir prevdir
+    $stderr.puts '<--- ' + rel if verbose?
+    @currdir = File.dirname(rel)
+  end
+
+  def run_hook(id)
+    path = [ "#{curr_srcdir()}/#{id}",
+             "#{curr_srcdir()}/#{id}.rb" ].detect {|cand| File.file?(cand) }
+    return unless path
+    begin
+      instance_eval File.read(path), path, 1
+    rescue
+      raise if $DEBUG
+      setup_rb_error "hook #{path} failed:\n" + $!.message
+    end
+  end
+
+end   # class Installer
+
+
+class SetupError < StandardError; end
+
+def setup_rb_error(msg)
+  raise SetupError, msg
+end
+
+if $0 == __FILE__
+  begin
+    ToplevelInstaller.invoke
+  rescue SetupError
+    raise if $DEBUG
+    $stderr.puts $!.message
+    $stderr.puts "Try 'ruby #{$0} --help' for detailed usage."
+    exit 1
+  end
+end
diff --git a/test/test_posix_mq.rb b/test/test_posix_mq.rb
new file mode 100644
index 0000000..00b0f5a
--- /dev/null
+++ b/test/test_posix_mq.rb
@@ -0,0 +1,225 @@
+# -*- encoding: binary -*-
+require 'test/unit'
+require 'posix_mq'
+require 'fcntl'
+$stderr.sync = $stdout.sync = true
+
+class Test_POSIX_MQ < Test::Unit::TestCase
+
+  HAVE_TO_IO = if POSIX_MQ.instance_methods.grep(/\Ato_io\z/).empty?
+    warn "POSIX_MQ#to_io not supported on this platform: #{RUBY_PLATFORM}"
+    false
+  else
+    true
+  end
+
+  def setup
+    @mq = nil
+    @path = "/posix_mq.rb.#{Time.now.to_i}.#$$.#{rand}"
+  end
+
+  def teardown
+    @mq or return
+    assert_equal @mq, @mq.unlink
+    assert ! @mq.closed?
+    assert_nil @mq.close
+    assert @mq.closed?
+  end
+
+  def test_timed_receive
+    interval = 0.01
+    @mq = POSIX_MQ.new(@path, :rw)
+    assert ! @mq.nonblock?
+    t0 = Time.now
+    assert_raises(Errno::ETIMEDOUT) { @mq.receive "", interval }
+    elapsed = Time.now - t0
+    assert elapsed > interval
+  end
+
+  def test_timed_send
+    interval = 0.01
+    @mq = POSIX_MQ.new(@path, :rw, 0666, POSIX_MQ::Attr[0, 1, 1, 0])
+    assert ! @mq.nonblock?
+    assert_nothing_raised { @mq.send "A", 1, interval }
+    t0 = Time.now
+    assert_raises(Errno::ETIMEDOUT) { @mq.send "B", 1, interval }
+    elapsed = Time.now - t0
+    assert elapsed > interval
+  end
+
+  def test_open
+    POSIX_MQ.open(@path, IO::CREAT|IO::WRONLY, 0666) do |mq|
+      @mq = mq
+      assert mq.kind_of?(POSIX_MQ)
+      assert_equal @path, mq.name
+      assert_nil mq.send("HI", 0)
+      assert_equal 1, mq.attr.curmsgs
+      assert_nil mq.close
+      assert_raises(IOError) { mq.close }
+    end
+    assert @mq.closed?
+    @mq = nil
+    POSIX_MQ.unlink(@path)
+  end
+
+  def test_name
+    path = "" << @path.dup
+    path.freeze
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY, 0666
+    assert_equal path, @mq.name
+  end
+
+  def test_new_readonly
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY, 0666
+    rd = POSIX_MQ.new @path, IO::RDONLY
+    assert_equal @mq.name, rd.name
+    assert_nil rd.close
+  end
+
+  def test_send0_receive
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    assert_equal(@mq, @mq << "hello")
+    assert_equal [ "hello", 0 ], @mq.receive
+  end
+
+  def test_send0_chain
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    @mq << "hello" << "world"
+    assert_equal [ "hello", 0 ], @mq.receive
+    assert_equal [ "world", 0 ], @mq.receive
+  end
+
+  def test_send_receive
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    assert_nil @mq.send("hello", 0)
+    assert_equal [ "hello", 0 ], @mq.receive
+  end
+
+  def test_send_receive_buf
+    buf = ""
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    assert_nil @mq.send("hello", 0)
+    assert_equal [ "hello", 0 ], @mq.receive(buf)
+    assert_equal "hello", buf
+  end
+
+  def test_send_receive_prio
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    assert_nil @mq.send("hello", 2)
+    assert_equal [ "hello", 2 ], @mq.receive
+  end
+
+  def test_getattr
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY, 0666
+    mq_attr = @mq.attr
+    assert_equal POSIX_MQ::Attr, mq_attr.class
+    assert mq_attr.flags.kind_of?(Integer)
+    assert mq_attr.maxmsg.kind_of?(Integer)
+    assert mq_attr.msgsize.kind_of?(Integer)
+    assert mq_attr.curmsgs.kind_of?(Integer)
+  end
+
+  def test_to_io
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    assert @mq.to_io.kind_of?(IO)
+    assert_nothing_raised { IO.select([@mq], nil, nil, 0) }
+  end if HAVE_TO_IO
+
+  def test_notify
+    rd, wr = IO.pipe
+    orig = trap(:USR1) { wr.syswrite('.') }
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666
+    assert_nothing_raised { @mq.notify = :SIGUSR1 }
+    assert_nothing_raised { @mq.send("hello", 0) }
+    assert_equal [[rd], [], []], IO.select([rd], nil, nil, 10)
+    assert_equal '.', rd.sysread(1)
+    assert_nil(@mq.notify = nil)
+    assert_nothing_raised { @mq.send("hello", 0) }
+    assert_nil IO.select([rd], nil, nil, 0.1)
+    assert_raises(Errno::EBUSY) { @mq.notify = :USR1 }
+    ensure
+      trap(:USR1, orig)
+  end
+
+  def test_setattr
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY, 0666
+    mq_attr = POSIX_MQ::Attr.new(IO::NONBLOCK)
+    @mq.attr = mq_attr
+    assert_equal IO::NONBLOCK, @mq.attr.flags
+    assert mq_attr.flags.kind_of?(Integer)
+
+    mq_attr.flags = 0
+    @mq.attr = mq_attr
+    assert_equal 0, @mq.attr.flags
+  end
+
+  def test_new_nonblocking
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY|IO::NONBLOCK, 0666
+    assert @mq.nonblock?
+  end
+
+  def test_new_blocking
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY, 0666
+    assert ! @mq.nonblock?
+  end
+
+  def test_nonblock_toggle
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::WRONLY, 0666
+    assert ! @mq.nonblock?
+    @mq.nonblock = true
+    assert @mq.nonblock?
+    @mq.nonblock = false
+    assert ! @mq.nonblock?
+    assert_raises(ArgumentError) { @mq.nonblock = nil }
+  end
+
+  def test_new_sym_w
+    @mq = POSIX_MQ.new @path, :w
+    assert_equal IO::WRONLY, @mq.to_io.fcntl(Fcntl::F_GETFL)
+  end if HAVE_TO_IO
+
+  def test_new_sym_r
+    @mq = POSIX_MQ.new @path, :w
+    mq = nil
+    assert_nothing_raised { mq = POSIX_MQ.new @path, :r }
+    assert_equal IO::RDONLY, mq.to_io.fcntl(Fcntl::F_GETFL)
+    assert_nil mq.close
+  end if HAVE_TO_IO
+
+  def test_new_path_only
+    @mq = POSIX_MQ.new @path, :w
+    mq = nil
+    assert_nothing_raised { mq = POSIX_MQ.new @path }
+    assert_equal IO::RDONLY, mq.to_io.fcntl(Fcntl::F_GETFL)
+    assert_nil mq.close
+  end if HAVE_TO_IO
+
+  def test_new_sym_wr
+    @mq = POSIX_MQ.new @path, :rw
+    assert_equal IO::RDWR, @mq.to_io.fcntl(Fcntl::F_GETFL)
+  end if HAVE_TO_IO
+
+  def test_new_attr
+    mq_attr = POSIX_MQ::Attr.new(IO::NONBLOCK, 1, 1, 0)
+    @mq = POSIX_MQ.new @path, IO::CREAT|IO::RDWR, 0666, mq_attr
+    assert @mq.nonblock?
+    assert_equal mq_attr, @mq.attr
+
+    assert_raises(Errno::EAGAIN) { @mq.receive }
+    assert_raises(Errno::EMSGSIZE) { @mq << '..' }
+    assert_nothing_raised { @mq << '.' }
+    assert_equal [ '.', 0 ], @mq.receive
+    assert_nothing_raised { @mq << '.' }
+    assert_raises(Errno::EAGAIN) { @mq << '.' }
+  end
+
+  def test_prio_max
+    min_posix_mq_prio_max = 31 # defined by POSIX
+    assert POSIX_MQ::PRIO_MAX >= min_posix_mq_prio_max
+  end
+
+  def test_open_max
+    assert POSIX_MQ::OPEN_MAX.kind_of?(Integer)
+  end
+
+end