Change license, change style, remove info manual, flat dir hier2

Signed-off-by: Mattias Andrée <maandree@kth.se>

17 files changed, 246 insertions, 1800 deletions

diff --git a/.gitignore b/.gitignore
index c60b56f..3c0c204 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,20 +1,9 @@
-_/
-/bin/
-/obj/
-\#*\#
-.*
-!.git*
+*\#*
 *~
-*.bak
-*.new
-*.swp
-*.swo
-*.out
 *.o
 *.su
-*.gch
-*.pdf
-*.ps
-*.dvi
-*.info
-
+*.bash
+*.zsh
+*.fish
+/sleep-until
+/clocks.h
diff --git a/COPYING b/COPYING
deleted file mode 100644
index 2e0bea3..0000000
--- a/COPYING
+++ /dev/null
@@ -1,17 +0,0 @@
-sleep-until – Sleeps until a specified time
-
-Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU Affero General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU Affero General Public License for more details.
-
-You should have received a copy of the GNU Affero General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
diff --git a/DEPENDENCIES b/DEPENDENCIES
index d22ead4..4fda9b4 100644
--- a/DEPENDENCIES
+++ b/DEPENDENCIES
@@ -3,6 +3,7 @@ RUNTIME DEPENDENCIES:
 	linux>=2.6.25
 	libc (glibc>=2.8)
 
+
 BUILD DEPENDENCIES:
 
 	libc (glibc>=2.8)
@@ -10,13 +11,11 @@ BUILD DEPENDENCIES:
 	make
 	coreutils
 	grep
-	gpp (https://github.com/maandree/gpp)
-	texinfo (opt-out, for info, pdf, ps and dvi manuals)
-	texlive-core (opt-in, for pdf, ps and dvi manuals)
+	sed
 	auto-auto-complete (out-put, for shell tab-compeltion)
 
+
 INSTALL DEPENDENCIES:
 
 	make
 	coreutils
-
diff --git a/LICENSE b/LICENSE
index dba13ed..e2e53aa 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,661 +1,15 @@
-                    GNU AFFERO GENERAL PUBLIC LICENSE
-                       Version 3, 19 November 2007
+ISC License
 
- 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.
+© 2015, 2019 Mattias Andrée <maandree@kth.se>
 
-                            Preamble
+Permission to use, copy, modify, and/or distribute this software for any
+purpose with or without fee is hereby granted, provided that the above
+copyright notice and this permission notice appear in all copies.
 
-  The GNU Affero General Public License is a free, copyleft license for
-software and other kinds of works, specifically designed to ensure
-cooperation with the community in the case of network server software.
-
-  The licenses for most software and other practical works are designed
-to take away your freedom to share and change the works.  By contrast,
-our General Public Licenses are intended to guarantee your freedom to
-share and change all versions of a program--to make sure it remains free
-software for all its users.
-
-  When we speak of free software, we are referring to freedom, not
-price.  Our General Public Licenses are designed to make sure that you
-have the freedom to distribute copies of free software (and charge for
-them if you wish), that you receive source code or can get it if you
-want it, that you can change the software or use pieces of it in new
-free programs, and that you know you can do these things.
-
-  Developers that use our General Public Licenses protect your rights
-with two steps: (1) assert copyright on the software, and (2) offer
-you this License which gives you legal permission to copy, distribute
-and/or modify the software.
-
-  A secondary benefit of defending all users' freedom is that
-improvements made in alternate versions of the program, if they
-receive widespread use, become available for other developers to
-incorporate.  Many developers of free software are heartened and
-encouraged by the resulting cooperation.  However, in the case of
-software used on network servers, this result may fail to come about.
-The GNU General Public License permits making a modified version and
-letting the public access it on a server without ever releasing its
-source code to the public.
-
-  The GNU Affero General Public License is designed specifically to
-ensure that, in such cases, the modified source code becomes available
-to the community.  It requires the operator of a network server to
-provide the source code of the modified version running there to the
-users of that server.  Therefore, public use of a modified version, on
-a publicly accessible server, gives the public access to the source
-code of the modified version.
-
-  An older license, called the Affero General Public License and
-published by Affero, was designed to accomplish similar goals.  This is
-a different license, not a version of the Affero GPL, but Affero has
-released a new version of the Affero GPL which permits relicensing under
-this license.
-
-  The precise terms and conditions for copying, distribution and
-modification follow.
-
-                       TERMS AND CONDITIONS
-
-  0. Definitions.
-
-  "This License" refers to version 3 of the GNU Affero General Public License.
-
-  "Copyright" also means copyright-like laws that apply to other kinds of
-works, such as semiconductor masks.
-
-  "The Program" refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as "you".  "Licensees" and
-"recipients" may be individuals or organizations.
-
-  To "modify" a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of an
-exact copy.  The resulting work is called a "modified version" of the
-earlier work or a work "based on" the earlier work.
-
-  A "covered work" means either the unmodified Program or a work based
-on the Program.
-
-  To "propagate" a work means to do anything with it that, without
-permission, would make you directly or secondarily liable for
-infringement under applicable copyright law, except executing it on a
-computer or modifying a private copy.  Propagation includes copying,
-distribution (with or without modification), making available to the
-public, and in some countries other activities as well.
-
-  To "convey" a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user through
-a computer network, with no transfer of a copy, is not conveying.
-
-  An interactive user interface displays "Appropriate Legal Notices"
-to the extent that it includes a convenient and prominently visible
-feature that (1) displays an appropriate copyright notice, and (2)
-tells the user that there is no warranty for the work (except to the
-extent that warranties are provided), that licensees may convey the
-work under this License, and how to view a copy of this License.  If
-the interface presents a list of user commands or options, such as a
-menu, a prominent item in the list meets this criterion.
-
-  1. Source Code.
-
-  The "source code" for a work means the preferred form of the work
-for making modifications to it.  "Object code" means any non-source
-form of a work.
-
-  A "Standard Interface" means an interface that either is an official
-standard defined by a recognized standards body, or, in the case of
-interfaces specified for a particular programming language, one that
-is widely used among developers working in that language.
-
-  The "System Libraries" of an executable work include anything, other
-than the work as a whole, that (a) is included in the normal form of
-packaging a Major Component, but which is not part of that Major
-Component, and (b) serves only to enable use of the work with that
-Major Component, or to implement a Standard Interface for which an
-implementation is available to the public in source code form.  A
-"Major Component", in this context, means a major essential component
-(kernel, window system, and so on) of the specific operating system
-(if any) on which the executable work runs, or a compiler used to
-produce the work, or an object code interpreter used to run it.
-
-  The "Corresponding Source" for a work in object code form means all
-the source code needed to generate, install, and (for an executable
-work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
-System Libraries, or general-purpose tools or generally available free
-programs which are used unmodified in performing those activities but
-which are not part of the work.  For example, Corresponding Source
-includes interface definition files associated with source files for
-the work, and the source code for shared libraries and dynamically
-linked subprograms that the work is specifically designed to require,
-such as by intimate data communication or control flow between those
-subprograms and other parts of the work.
-
-  The Corresponding Source need not include anything that users
-can regenerate automatically from other parts of the Corresponding
-Source.
-
-  The Corresponding Source for a work in source code form is that
-same work.
-
-  2. Basic Permissions.
-
-  All rights granted under this License are granted for the term of
-copyright on the Program, and are irrevocable provided the stated
-conditions are met.  This License explicitly affirms your unlimited
-permission to run the unmodified Program.  The output from running a
-covered work is covered by this License only if the output, given its
-content, constitutes a covered work.  This License acknowledges your
-rights of fair use or other equivalent, as provided by copyright law.
-
-  You may make, run and propagate covered works that you do not
-convey, without conditions so long as your license otherwise remains
-in force.  You may convey covered works to others for the sole purpose
-of having them make modifications exclusively for you, or provide you
-with facilities for running those works, provided that you comply with
-the terms of this License in conveying all material for which you do
-not control copyright.  Those thus making or running the covered works
-for you must do so exclusively on your behalf, under your direction
-and control, on terms that prohibit them from making any copies of
-your copyrighted material outside their relationship with you.
-
-  Conveying under any other circumstances is permitted solely under
-the conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
-
-  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
-
-  No covered work shall be deemed part of an effective technological
-measure under any applicable law fulfilling obligations under article
-11 of the WIPO copyright treaty adopted on 20 December 1996, or
-similar laws prohibiting or restricting circumvention of such
-measures.
-
-  When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such circumvention
-is effected by exercising rights under this License with respect to
-the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
-technological measures.
-
-  4. Conveying Verbatim Copies.
-
-  You may convey verbatim copies of the Program's source code as you
-receive it, in any medium, provided that you conspicuously and
-appropriately publish on each copy an appropriate copyright notice;
-keep intact all notices stating that this License and any
-non-permissive terms added in accord with section 7 apply to the code;
-keep intact all notices of the absence of any warranty; and give all
-recipients a copy of this License along with the Program.
-
-  You may charge any price or no price for each copy that you convey,
-and you may offer support or warranty protection for a fee.
-
-  5. Conveying Modified Source Versions.
-
-  You may convey a work based on the Program, or the modifications to
-produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these conditions:
-
-    a) The work must carry prominent notices stating that you modified
-    it, and giving a relevant date.
-
-    b) The work must carry prominent notices stating that it is
-    released under this License and any conditions added under section
-    7.  This requirement modifies the requirement in section 4 to
-    "keep intact all notices".
-
-    c) You must license the entire work, as a whole, under this
-    License to anyone who comes into possession of a copy.  This
-    License will therefore apply, along with any applicable section 7
-    additional terms, to the whole of the work, and all its parts,
-    regardless of how they are packaged.  This License gives no
-    permission to license the work in any other way, but it does not
-    invalidate such permission if you have separately received it.
-
-    d) If the work has interactive user interfaces, each must display
-    Appropriate Legal Notices; however, if the Program has interactive
-    interfaces that do not display Appropriate Legal Notices, your
-    work need not make them do so.
-
-  A compilation of a covered work with other separate and independent
-works, which are not by their nature extensions of the covered work,
-and which are not combined with it such as to form a larger program,
-in or on a volume of a storage or distribution medium, is called an
-"aggregate" if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
-beyond what the individual works permit.  Inclusion of a covered work
-in an aggregate does not cause this License to apply to the other
-parts of the aggregate.
-
-  6. Conveying Non-Source Forms.
-
-  You may convey a covered work in object code form under the terms
-of sections 4 and 5, provided that you also convey the
-machine-readable Corresponding Source under the terms of this License,
-in one of these ways:
-
-    a) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by the
-    Corresponding Source fixed on a durable physical medium
-    customarily used for software interchange.
-
-    b) Convey the object code in, or embodied in, a physical product
-    (including a physical distribution medium), accompanied by a
-    written offer, valid for at least three years and valid for as
-    long as you offer spare parts or customer support for that product
-    model, to give anyone who possesses the object code either (1) a
-    copy of the Corresponding Source for all the software in the
-    product that is covered by this License, on a durable physical
-    medium customarily used for software interchange, for a price no
-    more than your reasonable cost of physically performing this
-    conveying of source, or (2) access to copy the
-    Corresponding Source from a network server at no charge.
-
-    c) Convey individual copies of the object code with a copy of the
-    written offer to provide the Corresponding Source.  This
-    alternative is allowed only occasionally and noncommercially, and
-    only if you received the object code with such an offer, in accord
-    with subsection 6b.
-
-    d) Convey the object code by offering access from a designated
-    place (gratis or for a charge), and offer equivalent access to the
-    Corresponding Source in the same way through the same place at no
-    further charge.  You need not require recipients to copy the
-    Corresponding Source along with the object code.  If the place to
-    copy the object code is a network server, the Corresponding Source
-    may be on a different server (operated by you or a third party)
-    that supports equivalent copying facilities, provided you maintain
-    clear directions next to the object code saying where to find the
-    Corresponding Source.  Regardless of what server hosts the
-    Corresponding Source, you remain obligated to ensure that it is
-    available for as long as needed to satisfy these requirements.
-
-    e) Convey the object code using peer-to-peer transmission, provided
-    you inform other peers where the object code and Corresponding
-    Source of the work are being offered to the general public at no
-    charge under subsection 6d.
-
-  A separable portion of the object code, whose source code is excluded
-from the Corresponding Source as a System Library, need not be
-included in conveying the object code work.
-
-  A "User Product" is either (1) a "consumer product", which means any
-tangible personal property which is normally used for personal, family,
-or household purposes, or (2) anything designed or sold for incorporation
-into a dwelling.  In determining whether a product is a consumer product,
-doubtful cases shall be resolved in favor of coverage.  For a particular
-product received by a particular user, "normally used" refers to a
-typical or common use of that class of product, regardless of the status
-of the particular user or of the way in which the particular user
-actually uses, or expects or is expected to use, the product.  A product
-is a consumer product regardless of whether the product has substantial
-commercial, industrial or non-consumer uses, unless such uses represent
-the only significant mode of use of the product.
-
-  "Installation Information" for a User Product means any methods,
-procedures, authorization keys, or other information required to install
-and execute modified versions of a covered work in that User Product from
-a modified version of its Corresponding Source.  The information must
-suffice to ensure that the continued functioning of the modified object
-code is in no case prevented or interfered with solely because
-modification has been made.
-
-  If you convey an object code work under this section in, or with, or
-specifically for use in, a User Product, and the conveying occurs as
-part of a transaction in which the right of possession and use of the
-User Product is transferred to the recipient in perpetuity or for a
-fixed term (regardless of how the transaction is characterized), the
-Corresponding Source conveyed under this section must be accompanied
-by the Installation Information.  But this requirement does not apply
-if neither you nor any third party retains the ability to install
-modified object code on the User Product (for example, the work has
-been installed in ROM).
-
-  The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or updates
-for a work that has been modified or installed by the recipient, or for
-the User Product in which it has been modified or installed.  Access to a
-network may be denied when the modification itself materially and
-adversely affects the operation of the network or violates the rules and
-protocols for communication across the network.
-
-  Corresponding Source conveyed, and Installation Information provided,
-in accord with this section must be in a format that is publicly
-documented (and with an implementation available to the public in
-source code form), and must require no special password or key for
-unpacking, reading or copying.
-
-  7. Additional Terms.
-
-  "Additional permissions" are terms that supplement the terms of this
-License by making exceptions from one or more of its conditions.
-Additional permissions that are applicable to the entire Program shall
-be treated as though they were included in this License, to the extent
-that they are valid under applicable law.  If additional permissions
-apply only to part of the Program, that part may be used separately
-under those permissions, but the entire Program remains governed by
-this License without regard to the additional permissions.
-
-  When you convey a copy of a covered work, you may at your option
-remove any additional permissions from that copy, or from any part of
-it.  (Additional permissions may be written to require their own
-removal in certain cases when you modify the work.)  You may place
-additional permissions on material, added by you to a covered work,
-for which you have or can give appropriate copyright permission.
-
-  Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders of
-that material) supplement the terms of this License with terms:
-
-    a) Disclaiming warranty or limiting liability differently from the
-    terms of sections 15 and 16 of this License; or
-
-    b) Requiring preservation of specified reasonable legal notices or
-    author attributions in that material or in the Appropriate Legal
-    Notices displayed by works containing it; or
-
-    c) Prohibiting misrepresentation of the origin of that material, or
-    requiring that modified versions of such material be marked in
-    reasonable ways as different from the original version; or
-
-    d) Limiting the use for publicity purposes of names of licensors or
-    authors of the material; or
-
-    e) Declining to grant rights under trademark law for use of some
-    trade names, trademarks, or service marks; or
-
-    f) Requiring indemnification of licensors and authors of that
-    material by anyone who conveys the material (or modified versions of
-    it) with contractual assumptions of liability to the recipient, for
-    any liability that these contractual assumptions directly impose on
-    those licensors and authors.
-
-  All other non-permissive additional terms are considered "further
-restrictions" within the meaning of section 10.  If the Program as you
-received it, or any part of it, contains a notice stating that it is
-governed by this License along with a term that is a further
-restriction, you may remove that term.  If a license document contains
-a further restriction but permits relicensing or conveying under this
-License, you may add to a covered work material governed by the terms
-of that license document, provided that the further restriction does
-not survive such relicensing or conveying.
-
-  If you add terms to a covered work in accord with this section, you
-must place, in the relevant source files, a statement of the
-additional terms that apply to those files, or a notice indicating
-where to find the applicable terms.
-
-  Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions;
-the above requirements apply either way.
-
-  8. Termination.
-
-  You may not propagate or modify a covered work except as expressly
-provided under this License.  Any attempt otherwise to propagate or
-modify it is void, and will automatically terminate your rights under
-this License (including any patent licenses granted under the third
-paragraph of section 11).
-
-  However, if you cease all violation of this License, then your
-license from a particular copyright holder is reinstated (a)
-provisionally, unless and until the copyright holder explicitly and
-finally terminates your license, and (b) permanently, if the copyright
-holder fails to notify you of the violation by some reasonable means
-prior to 60 days after the cessation.
-
-  Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-
-  Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, you do not qualify to receive new licenses for the same
-material under section 10.
-
-  9. Acceptance Not Required for Having Copies.
-
-  You are not required to accept this License in order to receive or
-run a copy of the Program.  Ancillary propagation of a covered work
-occurring solely as a consequence of using peer-to-peer transmission
-to receive a copy likewise does not require acceptance.  However,
-nothing other than this License grants you permission to propagate or
-modify any covered work.  These actions infringe copyright if you do
-not accept this License.  Therefore, by modifying or propagating a
-covered work, you indicate your acceptance of this License to do so.
-
-  10. Automatic Licensing of Downstream Recipients.
-
-  Each time you convey a covered work, the recipient automatically
-receives a license from the original licensors, to run, modify and
-propagate that work, subject to this License.  You are not responsible
-for enforcing compliance by third parties with this License.
-
-  An "entity transaction" is a transaction transferring control of an
-organization, or substantially all assets of one, or subdividing an
-organization, or merging organizations.  If propagation of a covered
-work results from an entity transaction, each party to that
-transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
-give under the previous paragraph, plus a right to possession of the
-Corresponding Source of the work from the predecessor in interest, if
-the predecessor has it or can get it with reasonable efforts.
-
-  You may not impose any further restrictions on the exercise of the
-rights granted or affirmed under this License.  For example, you may
-not impose a license fee, royalty, or other charge for exercise of
-rights granted under this License, and you may not initiate litigation
-(including a cross-claim or counterclaim in a lawsuit) alleging that
-any patent claim is infringed by making, using, selling, offering for
-sale, or importing the Program or any portion of it.
-
-  11. Patents.
-
-  A "contributor" is a copyright holder who authorizes use under this
-License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's "contributor version".
-
-  A contributor's "essential patent claims" are all patent claims
-owned or controlled by the contributor, whether already acquired or
-hereafter acquired, that would be infringed by some manner, permitted
-by this License, of making, using, or selling its contributor version,
-but do not include claims that would be infringed only as a
-consequence of further modification of the contributor version.  For
-purposes of this definition, "control" includes the right to grant
-patent sublicenses in a manner consistent with the requirements of
-this License.
-
-  Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
-make, use, sell, offer for sale, import and otherwise run, modify and
-propagate the contents of its contributor version.
-
-  In the following three paragraphs, a "patent license" is any express
-agreement or commitment, however denominated, not to enforce a patent
-(such as an express permission to practice a patent or covenant not to
-sue for patent infringement).  To "grant" such a patent license to a
-party means to make such an agreement or commitment not to enforce a
-patent against the party.
-
-  If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  "Knowingly relying" means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-
-  If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-
-  A patent license is "discriminatory" if it does not include within
-the scope of its coverage, prohibits the exercise of, or is
-conditioned on the non-exercise of one or more of the rights that are
-specifically granted under this License.  You may not convey a covered
-work if you are a party to an arrangement with a third party that is
-in the business of distributing software, under which you make payment
-to the third party based on the extent of your activity of conveying
-the work, and under which the third party grants, to any of the
-parties who would receive the covered work from you, a discriminatory
-patent license (a) in connection with copies of the covered work
-conveyed by you (or copies made from those copies), or (b) primarily
-for and in connection with specific products or compilations that
-contain the covered work, unless you entered into that arrangement,
-or that patent license was granted, prior to 28 March 2007.
-
-  Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-  12. No Surrender of Others' Freedom.
-
-  If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey a
-covered work so as to satisfy simultaneously your obligations under this
-License and any other pertinent obligations, then as a consequence you may
-not convey it at all.  For example, if you agree to terms that obligate you
-to collect a royalty for further conveying from those to whom you convey
-the Program, the only way you could satisfy both those terms and this
-License would be to refrain entirely from conveying the Program.
-
-  13. Remote Network Interaction; Use with the GNU General Public License.
-
-  Notwithstanding any other provision of this License, if you modify the
-Program, your modified version must prominently offer all users
-interacting with it remotely through a computer network (if your version
-supports such interaction) an opportunity to receive the Corresponding
-Source of your version by providing access to the Corresponding Source
-from a network server at no charge, through some standard or customary
-means of facilitating copying of software.  This Corresponding Source
-shall include the Corresponding Source for any work covered by version 3
-of the GNU General Public License that is incorporated pursuant to the
-following paragraph.
-
-  Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the work with which it is combined will remain governed by version
-3 of the GNU General Public License.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU Affero 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
-Program specifies that a certain numbered version of the GNU Affero General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU Affero General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU Affero General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    <one line to give the program's name and a brief idea of what it does.>
-    Copyright (C) <year>  <name of author>
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU Affero General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU Affero General Public License for more details.
-
-    You should have received a copy of the GNU Affero General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If your software can interact with users remotely through a computer
-network, you should also make sure that it provides a way for users to
-get its source.  For example, if your program is a web application, its
-interface could display a "Source" link that leads users to an archive
-of the code.  There are many ways you could offer source, and different
-solutions will be better for different programs; see section 13 for the
-specific requirements.
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU AGPL, see
-<http://www.gnu.org/licenses/>.
+THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
diff --git a/Makefile b/Makefile
index 35addb0..61d51fb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,244 +1,68 @@
-# Copying and distribution of this file, with or without modification,
-# are permitted in any medium without royalty provided the copyright
-# notice and this notice are preserved.  This file is offered as-is,
-# without any warranty.
-
-
-# The package path prefix, if you want to install to another root, set DESTDIR to that root.
-PREFIX = /usr
-# The binary path excluding prefix.
-BIN = /bin
-# The resource path excluding prefix.
-DATA = /share
-# The binary path including prefix.
-BINDIR = $(PREFIX)$(BIN)
-# The resource path including prefix.
-DATADIR = $(PREFIX)$(DATA)
-# The generic documentation path including prefix
-DOCDIR = $(DATADIR)/doc
-# The info manual documentation path including prefix
-INFODIR = $(DATADIR)/info
-# The man page documentation path including prefix
-MANDIR = $(DATADIR)/man
-# The license base path including prefix.
-LICENSEDIR = $(DATADIR)/licenses
-
-
-# The name of the package as it should be installed.
-PKGNAME = sleep-until
-# The name of the command as it should be installed.
-COMMAND = sleep-until
-
-
-# The https://github.com/maandree/gpp command.
-GPP = gpp
-
-
-WARN = -Wall -Wextra -pedantic -Wdouble-promotion -Wformat=2 -Winit-self -Wmissing-include-dirs      \
-       -Wtrampolines -Wmissing-prototypes -Wmissing-declarations -Wnested-externs                    \
-       -Wno-variadic-macros -Wsync-nand -Wunsafe-loop-optimizations -Wcast-align                     \
-       -Wdeclaration-after-statement -Wundef -Wbad-function-cast -Wwrite-strings -Wlogical-op        \
-       -Wstrict-prototypes -Wold-style-definition -Wpacked -Wvector-operation-performance            \
-       -Wunsuffixed-float-constants -Wsuggest-attribute=const -Wsuggest-attribute=noreturn           \
-       -Wsuggest-attribute=format -Wnormalized=nfkc -Wshadow -Wredundant-decls -Winline -Wcast-qual  \
-       -Wsign-conversion -Wstrict-overflow=5 -Wconversion -Wsuggest-attribute=pure -Wswitch-default  \
-       -Wstrict-aliasing=1 -fstrict-overflow -Wfloat-equal -Wpadded -Waggregate-return               \
-       -Wtraditional-conversion
-STD = -std=c99
-OPTIMISE = -O2
-FLAGS = $(WARN) $(STD) $(OPTIMISE) -D_POSIX_C_SOURCE=199309L
-
-
-# Build rules.
-
-.PHONY: default
-default: command info shell
-
-.PHONY: all
-all: command doc shell
-
-# Build rules for the command.
-
-.PHONY: command
-command: bin/sleep-until
-
-bin/sleep-until: obj/sleep-until.o
-	@mkdir -p bin
-	$(CC) $(FLAGS) -o $@ $^ $(LDFLAGS)
-
-obj/sleep-until.o: obj/sleep-until.c
-	$(CC) $(FLAGS) -c -o $@ $< $(CFLAGS) $(CPPFLAGS)
-
-obj/sleep-until.c: src/sleep-until.c
-	@mkdir -p obj
-	$(GPP) -s '$$' -i $< -o $@
-
-# Build rules for documentation.
-
-.PHONY: doc
-doc: info pdf dvi ps
-
-.PHONY: info
-info: bin/sleep-until.info
-bin/%.info: doc/info/%.texinfo doc/info/fdl.texinfo
-	@mkdir -p bin
-	makeinfo $<
-	mv $*.info $@
-
-.PHONY: pdf
-pdf: bin/sleep-until.pdf
-bin/%.pdf: doc/info/%.texinfo doc/info/fdl.texinfo
-	@mkdir -p obj/pdf bin
-	cd obj/pdf ; yes X | texi2pdf ../../$< < /dev/null
-	mv obj/pdf/$*.pdf $@
-
-.PHONY: dvi
-dvi: bin/sleep-until.dvi
-bin/%.dvi: doc/info/%.texinfo doc/info/fdl.texinfo
-	@mkdir -p obj/dvi bin
-	cd obj/dvi ; yes X | $(TEXI2DVI) ../../$< < /dev/null
-	mv obj/dvi/$*.dvi $@
-
-.PHONY: ps
-ps: bin/sleep-until.ps
-bin/%.ps: doc/info/%.texinfo doc/info/fdl.texinfo
-	@mkdir -p obj/ps bin
-	cd obj/ps ; yes X | texi2pdf --ps ../../$< < /dev/null
-	mv obj/ps/$*.ps $@
-
-# Build rules for shell auto-completion.
-
-.PHONY: shell
-shell: bash zsh fish
-
-.PHONY: bash
-bash: bin/sleep-until.bash
-bin/sleep-until.bash: src/completion
-	@mkdir -p bin
-	auto-auto-complete bash --output $@ --source $<
-
-.PHONY: zsh
-zsh: bin/sleep-until.zsh
-bin/sleep-until.zsh: src/completion
-	@mkdir -p bin
-	auto-auto-complete zsh --output $@ --source $<
-
-.PHONY: fish
-fish: bin/sleep-until.fish
-bin/sleep-until.fish: src/completion
-	@mkdir -p bin
-	auto-auto-complete fish --output $@ --source $<
-
-
-# Install rules.
-
-.PHONY: install
-install: install-base install-info install-man install-shell
-
-.PHONY: install
-install-all: install-base install-doc install-shell
-
-# Install base rules.
+.POSIX:
 
-.PHONY: install-base
-install-base: install-command install-copyright
+CONFIGFILE = config.mk
+include $(CONFIGFILE)
 
-.PHONY: install-command
-install-command: bin/sleep-until
-	install -dm755 -- "$(DESTDIR)$(BINDIR)"
-	install -m755 $< -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
-
-.PHONY: install-copyright
-install-copyright: install-copying install-license
-
-.PHONY: install-copying
-install-copying:
-	install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
-	install -m644 COPYING -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/COPYING"
-
-.PHONY: install-license
-install-license:
-	install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
-	install -m644 LICENSE -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/LICENSE"
-
-# Install documentation.
-
-.PHONY: install-doc
-install-doc: install-info install-pdf install-ps install-dvi install-man
+all: base shell
+base: sleep-until
+shell: bash zsh fish
+bash: sleep-until.bash
+zsh: sleep-until.zsh
+fish: sleep-until.fish
 
-.PHONY: install-info
-install-info: bin/sleep-until.info
-	install -dm755 -- "$(DESTDIR)$(INFODIR)"
-	install -m644 $< -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info"
+clocks.h:
+	sed -n 's/^[ \t]*#[ \t]*define[ \t][ \t]*\(CLOCK_[^ \t]*\).*$$/X(\1)/p' < /usr/include/bits/time.h > $@
 
-.PHONY: install-pdf
-install-pdf: bin/sleep-until.pdf
-	install -dm755 -- "$(DESTDIR)$(DOCDIR)"
-	install -m644 $< -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf"
+sleep-until.o: sleep-until.c clocks.h
+	$(CC) -c -o $@ $< $(CFLAGS) $(CPPFLAGS)
 
-.PHONY: install-ps
-install-ps: bin/sleep-until.ps
-	install -dm755 -- "$(DESTDIR)$(DOCDIR)"
-	install -m644 $< -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps"
+sleep-until: sleep-until.o
+	$(CC) -o $@ sleep-until.o $(LDFLAGS)
 
-.PHONY: install-dvi
-install-dvi: bin/sleep-until.dvi
-	install -dm755 -- "$(DESTDIR)$(DOCDIR)"
-	install -m644 $< -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi"
+sleep-until.bash: completion
+	auto-auto-complete bash --output $@ --source $<
 
-.PHONY: install-man
-install-man:
-	install -dm755 -- "$(DESTDIR)$(MANDIR)/man1"
-	install -m644 doc/man/sleep-until.1 -- "$(DESTDIR)$(MANDIR)/man1/$(COMMAND).1"
+sleep-until.zsh: completion
+	auto-auto-complete zsh --output $@ --source $<
 
-# Install shell auto-completion.
+sleep-until.fish: completion
+	auto-auto-complete fish --output $@ --source $<
 
-.PHONY: install-shell
+install: install-base install-shell
 install-shell: install-bash install-zsh install-fish
 
-.PHONY: install-bash
-install-bash: bin/sleep-until.bash
-	install -dm755 -- "$(DESTDIR)$(DATADIR)/bash-completion/completions"
-	install -m644 $< -- "$(DESTDIR)$(DATADIR)/bash-completion/completions/$(COMMAND)"
+install-base: sleep-until
+	mkdir -p -- "$(DESTDIR)$(PREFIX)/bin"
+	mkdir -p -- "$(DESTDIR)$(MANPREFIX)/man1"
+	cp -- sleep-until "$(DESTDIR)$(PREFIX)/bin"
+	cp -- sleep-until.1 "$(DESTDIR)$(MANPREFIX)/man1"
 
-.PHONY: install-zsh
-install-zsh: bin/sleep-until.zsh
-	install -dm755 -- "$(DESTDIR)$(DATADIR)/zsh/site-functions"
-	install -m644 $< -- "$(DESTDIR)$(DATADIR)/zsh/site-functions/_$(COMMAND)"
+install-bash: sleep-until.bash
+	mkdir -p -- "$(DESTDIR)$(PREFIX)/share/bash-completion/completions"
+	cp -- sleep-until.bash "$(DESTDIR)$(PREFIX)/share/bash-completion/completions/sleep-until"
 
-.PHONY: install-fish
-install-fish: bin/sleep-until.fish
-	install -dm755 -- "$(DESTDIR)$(DATADIR)/fish/completions"
-	install -m644 $< -- "$(DESTDIR)$(DATADIR)/fish/completions/$(COMMAND).fish"
+install-zsh: sleep-until.zsh
+	mkdir -p -- "$(DESTDIR)$(PREFIX)/share/zsh/site-functions"
+	cp -- sleep-until.zsh "$(DESTDIR)$(PREFIX)/share/zsh/site-functions/_sleep-until"
 
+install-fish: sleep-until.fish
+	mkdir -p -- "$(DESTDIR)$(PREFIX)/share/fish/completions"
+	cp -- sleep-until.fish "$(DESTDIR)$(PREFIX)/share/fish/completions/sleep-until.fish"
 
-# Uninstall rules.
-
-.PHONY: uninstall
 uninstall:
-	-rm -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
-	-rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/COPYING"
-	-rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/LICENSE"
-	-rmdir -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
-	-rm -- "$(DESTDIR)$(INFODIR)/$(PKGNAME).info"
-	-rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).pdf"
-	-rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).ps"
-	-rm -- "$(DESTDIR)$(DOCDIR)/$(PKGNAME).dvi"
-	-rm -- "$(DESTDIR)$(MANDIR)/man1/$(COMMAND).1"
-	-rm -- "$(DESTDIR)$(DATADIR)/fish/completions/$(COMMAND).fish"
-	-rmdir -- "$(DESTDIR)$(DATADIR)/fish/completions"
-	-rmdir -- "$(DESTDIR)$(DATADIR)/fish"
-	-rm -- "$(DESTDIR)$(DATADIR)/zsh/site-functions/_$(COMMAND)"
-	-rmdir -- "$(DESTDIR)$(DATADIR)/zsh/site-functions"
-	-rmdir -- "$(DESTDIR)$(DATADIR)/zsh"
-	-rm -- "$(DESTDIR)$(DATADIR)/bash-completion/completions/$(COMMAND)"
-	-rmdir -- "$(DESTDIR)$(DATADIR)/bash-completion/completions"
-	-rmdir -- "$(DESTDIR)$(DATADIR)/bash-completion"
-
-
-# Clean rules.
-
-.PHONY: clean
+	-rm -f -- "$(DESTDIR)$(BINDIR)/sleep-until"
+	-rm -f -- "$(DESTDIR)$(MANPREFIX)/man1/sleep-until.1"
+	-rm -f -- "$(DESTDIR)$(PREFIX)/share/fish/completions/sleep-until.fish"
+	-rmdir -- "$(DESTDIR)$(PREFIX)/share/fish/completions"
+	-rmdir -- "$(DESTDIR)$(PREFIX)/share/fish"
+	-rm -f -- "$(DESTDIR)$(PREFIX)/share/zsh/site-functions/_sleep-until"
+	-rmdir -- "$(DESTDIR)$(PREFIX)/share/zsh/site-functions"
+	-rmdir -- "$(DESTDIR)$(PREFIX)/share/zsh"
+	-rm -f -- "$(DESTDIR)$(PREFIX)/share/bash-completion/completions/sleep-until"
+	-rmdir -- "$(DESTDIR)$(PREFIX)/share/bash-completion/completions"
+	-rmdir -- "$(DESTDIR)$(PREFIX)/share/bash-completion"
+
 clean:
-	-rm -rf obj bin
+	-rm -f -- sleep-until *.o clocks.h *.bash *.zsh *.fish
 
+.PHONY: all base shell bash zsh fish install install-base install-shell install-base install-zsh install-fish uninstall clean
diff --git a/README b/README
index d908e63..76d6de9 100644
--- a/README
+++ b/README
@@ -1,8 +1,8 @@
 NAME
-	sleep-until – sleeps until a specified time
+	sleep-until – sleep until a specified time
 
 SYNOPSIS
-	sleep-until CLOCKNAME... TIMEPOINT...
+	sleep-until [CLOCKNAME | TIMEPOINT] ...
 
 DESCRIPTION
 	Pause until TIMEPOINT. TIMEPOINT is the number of seconds
@@ -33,4 +33,3 @@ RATIONALE
 
 SEE ALSO
 	sleep(1), date(1)
-
diff --git a/src/completion b/completion
index 7876f18..3667c02 100644
--- a/src/completion
+++ b/completion
@@ -8,4 +8,3 @@
 				    CLOCK_REALTIME_ALARM
 				    CLOCK_BOOTTIME_ALARM))
 )
-
diff --git a/config.mk b/config.mk
new file mode 100644
index 0000000..eb4100f
--- /dev/null
+++ b/config.mk
@@ -0,0 +1,8 @@
+PREFIX = /usr
+MANPREFIX = $(PREFIX)/share/man
+
+CC = cc
+
+CPPFLAGS = -D_POSIX_C_SOURCE=199309L
+CFLAGS   = -std=c99 -Wall -O2
+LDFLAGS  = -s
diff --git a/dist/archlinux/stable/.gitignore b/dist/archlinux/stable/.gitignore
deleted file mode 100644
index 9ac8b17..0000000
--- a/dist/archlinux/stable/.gitignore
+++ /dev/null
@@ -1,6 +0,0 @@
-*
-!PKGBUILD
-!sleep-until.install
-!.git*
-*~
-
diff --git a/dist/archlinux/stable/PKGBUILD b/dist/archlinux/stable/PKGBUILD
deleted file mode 100644
index 64cb4c3..0000000
--- a/dist/archlinux/stable/PKGBUILD
+++ /dev/null
@@ -1,26 +0,0 @@
-# Maintainer: Mattias Andrée <`base64 -d`(bWFhbmRyZWUK)@member.fsf.org>
-
-pkgname=sleep-until
-pkgver=1
-pkgrel=1
-pkgdesc='Sleep until a specified time'
-arch=('i686' 'x86_64')
-url='https://github.com/maandree/sleep-until'
-license=('AGPL3')
-depends=('linux>=2.6.25' 'glibc>=2.8')
-makedepends=('glibc>=2.8' 'gcc' 'general-preprocessor' 'grep' 'texinfo' 'auto-auto-complete')
-install=sleep-until.install
-source=(https://github.com/maandree/sleep-until/archive/$pkgver.tar.gz)
-sha256sums=(fa1776be3f29c550f6eff48bcf714c76fcf399f1c7bac1d7306c5abc7fe14e17)
-
-
-build() {
-  cd "$srcdir/sleep-until-$pkgver"
-  make command info shell
-}
-
-package() {
-  cd "$srcdir/sleep-until-$pkgver"
-  make DESTDIR="$pkgdir" install-base install-info install-man install-shell
-}
-
diff --git a/dist/archlinux/stable/sleep-until.install b/dist/archlinux/stable/sleep-until.install
deleted file mode 100644
index 83a9144..0000000
--- a/dist/archlinux/stable/sleep-until.install
+++ /dev/null
@@ -1,20 +0,0 @@
-_file="sleep-until"
-
-infodir="usr/share/info"
-file="${_file}.info"
-
-
-post_install() {
-  [[ -x "usr/bin/install-info" ]] || return 0
-  install-info -- "${infodir}/${file}" "${infodir}/dir" 2> /dev/null
-}
-
-post_upgrade() {
-  post_install "$1"
-}
-
-pre_remove() {
-  [[ -x "usr/bin/install-info" ]] || return 0
-  install-info --delete -- "${infodir}/${file}" "${infodir}/dir" 2> /dev/null
-}
-
diff --git a/doc/info/fdl.texinfo b/doc/info/fdl.texinfo
deleted file mode 100644
index cb71f05..0000000
--- a/doc/info/fdl.texinfo
+++ /dev/null
@@ -1,505 +0,0 @@
-@c The GNU Free Documentation License.
-@center Version 1.3, 3 November 2008
-
-@c This file is intended to be included within another document,
-@c hence no sectioning command or @node.
-
-@display
-Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
-@uref{http://fsf.org/}
-
-Everyone is permitted to copy and distribute verbatim copies
-of this license document, but changing it is not allowed.
-@end display
-
-@enumerate 0
-@item
-PREAMBLE
-
-The purpose of this License is to make a manual, textbook, or other
-functional and useful document @dfn{free} in the sense of freedom: to
-assure everyone the effective freedom to copy and redistribute it,
-with or without modifying it, either commercially or noncommercially.
-Secondarily, this License preserves for the author and publisher a way
-to get credit for their work, while not being considered responsible
-for modifications made by others.
-
-This License is a kind of ``copyleft'', which means that derivative
-works of the document must themselves be free in the same sense.  It
-complements the GNU General Public License, which is a copyleft
-license designed for free software.
-
-We have designed this License in order to use it for manuals for free
-software, because free software needs free documentation: a free
-program should come with manuals providing the same freedoms that the
-software does.  But this License is not limited to software manuals;
-it can be used for any textual work, regardless of subject matter or
-whether it is published as a printed book.  We recommend this License
-principally for works whose purpose is instruction or reference.
-
-@item
-APPLICABILITY AND DEFINITIONS
-
-This License applies to any manual or other work, in any medium, that
-contains a notice placed by the copyright holder saying it can be
-distributed under the terms of this License.  Such a notice grants a
-world-wide, royalty-free license, unlimited in duration, to use that
-work under the conditions stated herein.  The ``Document'', below,
-refers to any such manual or work.  Any member of the public is a
-licensee, and is addressed as ``you''.  You accept the license if you
-copy, modify or distribute the work in a way requiring permission
-under copyright law.
-
-A ``Modified Version'' of the Document means any work containing the
-Document or a portion of it, either copied verbatim, or with
-modifications and/or translated into another language.
-
-A ``Secondary Section'' is a named appendix or a front-matter section
-of the Document that deals exclusively with the relationship of the
-publishers or authors of the Document to the Document's overall
-subject (or to related matters) and contains nothing that could fall
-directly within that overall subject.  (Thus, if the Document is in
-part a textbook of mathematics, a Secondary Section may not explain
-any mathematics.)  The relationship could be a matter of historical
-connection with the subject or with related matters, or of legal,
-commercial, philosophical, ethical or political position regarding
-them.
-
-The ``Invariant Sections'' are certain Secondary Sections whose titles
-are designated, as being those of Invariant Sections, in the notice
-that says that the Document is released under this License.  If a
-section does not fit the above definition of Secondary then it is not
-allowed to be designated as Invariant.  The Document may contain zero
-Invariant Sections.  If the Document does not identify any Invariant
-Sections then there are none.
-
-The ``Cover Texts'' are certain short passages of text that are listed,
-as Front-Cover Texts or Back-Cover Texts, in the notice that says that
-the Document is released under this License.  A Front-Cover Text may
-be at most 5 words, and a Back-Cover Text may be at most 25 words.
-
-A ``Transparent'' copy of the Document means a machine-readable copy,
-represented in a format whose specification is available to the
-general public, that is suitable for revising the document
-straightforwardly with generic text editors or (for images composed of
-pixels) generic paint programs or (for drawings) some widely available
-drawing editor, and that is suitable for input to text formatters or
-for automatic translation to a variety of formats suitable for input
-to text formatters.  A copy made in an otherwise Transparent file
-format whose markup, or absence of markup, has been arranged to thwart
-or discourage subsequent modification by readers is not Transparent.
-An image format is not Transparent if used for any substantial amount
-of text.  A copy that is not ``Transparent'' is called ``Opaque''.
-
-Examples of suitable formats for Transparent copies include plain
-ASCII without markup, Texinfo input format, La@TeX{} input
-format, SGML or XML using a publicly available
-DTD, and standard-conforming simple HTML,
-PostScript or PDF designed for human modification.  Examples
-of transparent image formats include PNG, XCF and
-JPG.  Opaque formats include proprietary formats that can be
-read and edited only by proprietary word processors, SGML or
-XML for which the DTD and/or processing tools are
-not generally available, and the machine-generated HTML,
-PostScript or PDF produced by some word processors for
-output purposes only.
-
-The ``Title Page'' means, for a printed book, the title page itself,
-plus such following pages as are needed to hold, legibly, the material
-this License requires to appear in the title page.  For works in
-formats which do not have any title page as such, ``Title Page'' means
-the text near the most prominent appearance of the work's title,
-preceding the beginning of the body of the text.
-
-The ``publisher'' means any person or entity that distributes copies
-of the Document to the public.
-
-A section ``Entitled XYZ'' means a named subunit of the Document whose
-title either is precisely XYZ or contains XYZ in parentheses following
-text that translates XYZ in another language.  (Here XYZ stands for a
-specific section name mentioned below, such as ``Acknowledgements'',
-``Dedications'', ``Endorsements'', or ``History''.)  To ``Preserve the Title''
-of such a section when you modify the Document means that it remains a
-section ``Entitled XYZ'' according to this definition.
-
-The Document may include Warranty Disclaimers next to the notice which
-states that this License applies to the Document.  These Warranty
-Disclaimers are considered to be included by reference in this
-License, but only as regards disclaiming warranties: any other
-implication that these Warranty Disclaimers may have is void and has
-no effect on the meaning of this License.
-
-@item
-VERBATIM COPYING
-
-You may copy and distribute the Document in any medium, either
-commercially or noncommercially, provided that this License, the
-copyright notices, and the license notice saying this License applies
-to the Document are reproduced in all copies, and that you add no other
-conditions whatsoever to those of this License.  You may not use
-technical measures to obstruct or control the reading or further
-copying of the copies you make or distribute.  However, you may accept
-compensation in exchange for copies.  If you distribute a large enough
-number of copies you must also follow the conditions in section 3.
-
-You may also lend copies, under the same conditions stated above, and
-you may publicly display copies.
-
-@item
-COPYING IN QUANTITY
-
-If you publish printed copies (or copies in media that commonly have
-printed covers) of the Document, numbering more than 100, and the
-Document's license notice requires Cover Texts, you must enclose the
-copies in covers that carry, clearly and legibly, all these Cover
-Texts: Front-Cover Texts on the front cover, and Back-Cover Texts on
-the back cover.  Both covers must also clearly and legibly identify
-you as the publisher of these copies.  The front cover must present
-the full title with all words of the title equally prominent and
-visible.  You may add other material on the covers in addition.
-Copying with changes limited to the covers, as long as they preserve
-the title of the Document and satisfy these conditions, can be treated
-as verbatim copying in other respects.
-
-If the required texts for either cover are too voluminous to fit
-legibly, you should put the first ones listed (as many as fit
-reasonably) on the actual cover, and continue the rest onto adjacent
-pages.
-
-If you publish or distribute Opaque copies of the Document numbering
-more than 100, you must either include a machine-readable Transparent
-copy along with each Opaque copy, or state in or with each Opaque copy
-a computer-network location from which the general network-using
-public has access to download using public-standard network protocols
-a complete Transparent copy of the Document, free of added material.
-If you use the latter option, you must take reasonably prudent steps,
-when you begin distribution of Opaque copies in quantity, to ensure
-that this Transparent copy will remain thus accessible at the stated
-location until at least one year after the last time you distribute an
-Opaque copy (directly or through your agents or retailers) of that
-edition to the public.
-
-It is requested, but not required, that you contact the authors of the
-Document well before redistributing any large number of copies, to give
-them a chance to provide you with an updated version of the Document.
-
-@item
-MODIFICATIONS
-
-You may copy and distribute a Modified Version of the Document under
-the conditions of sections 2 and 3 above, provided that you release
-the Modified Version under precisely this License, with the Modified
-Version filling the role of the Document, thus licensing distribution
-and modification of the Modified Version to whoever possesses a copy
-of it.  In addition, you must do these things in the Modified Version:
-
-@enumerate A
-@item
-Use in the Title Page (and on the covers, if any) a title distinct
-from that of the Document, and from those of previous versions
-(which should, if there were any, be listed in the History section
-of the Document).  You may use the same title as a previous version
-if the original publisher of that version gives permission.
-
-@item
-List on the Title Page, as authors, one or more persons or entities
-responsible for authorship of the modifications in the Modified
-Version, together with at least five of the principal authors of the
-Document (all of its principal authors, if it has fewer than five),
-unless they release you from this requirement.
-
-@item
-State on the Title page the name of the publisher of the
-Modified Version, as the publisher.
-
-@item
-Preserve all the copyright notices of the Document.
-
-@item
-Add an appropriate copyright notice for your modifications
-adjacent to the other copyright notices.
-
-@item
-Include, immediately after the copyright notices, a license notice
-giving the public permission to use the Modified Version under the
-terms of this License, in the form shown in the Addendum below.
-
-@item
-Preserve in that license notice the full lists of Invariant Sections
-and required Cover Texts given in the Document's license notice.
-
-@item
-Include an unaltered copy of this License.
-
-@item
-Preserve the section Entitled ``History'', Preserve its Title, and add
-to it an item stating at least the title, year, new authors, and
-publisher of the Modified Version as given on the Title Page.  If
-there is no section Entitled ``History'' in the Document, create one
-stating the title, year, authors, and publisher of the Document as
-given on its Title Page, then add an item describing the Modified
-Version as stated in the previous sentence.
-
-@item
-Preserve the network location, if any, given in the Document for
-public access to a Transparent copy of the Document, and likewise
-the network locations given in the Document for previous versions
-it was based on.  These may be placed in the ``History'' section.
-You may omit a network location for a work that was published at
-least four years before the Document itself, or if the original
-publisher of the version it refers to gives permission.
-
-@item
-For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve
-the Title of the section, and preserve in the section all the
-substance and tone of each of the contributor acknowledgements and/or
-dedications given therein.
-
-@item
-Preserve all the Invariant Sections of the Document,
-unaltered in their text and in their titles.  Section numbers
-or the equivalent are not considered part of the section titles.
-
-@item
-Delete any section Entitled ``Endorsements''.  Such a section
-may not be included in the Modified Version.
-
-@item
-Do not retitle any existing section to be Entitled ``Endorsements'' or
-to conflict in title with any Invariant Section.
-
-@item
-Preserve any Warranty Disclaimers.
-@end enumerate
-
-If the Modified Version includes new front-matter sections or
-appendices that qualify as Secondary Sections and contain no material
-copied from the Document, you may at your option designate some or all
-of these sections as invariant.  To do this, add their titles to the
-list of Invariant Sections in the Modified Version's license notice.
-These titles must be distinct from any other section titles.
-
-You may add a section Entitled ``Endorsements'', provided it contains
-nothing but endorsements of your Modified Version by various
-parties---for example, statements of peer review or that the text has
-been approved by an organization as the authoritative definition of a
-standard.
-
-You may add a passage of up to five words as a Front-Cover Text, and a
-passage of up to 25 words as a Back-Cover Text, to the end of the list
-of Cover Texts in the Modified Version.  Only one passage of
-Front-Cover Text and one of Back-Cover Text may be added by (or
-through arrangements made by) any one entity.  If the Document already
-includes a cover text for the same cover, previously added by you or
-by arrangement made by the same entity you are acting on behalf of,
-you may not add another; but you may replace the old one, on explicit
-permission from the previous publisher that added the old one.
-
-The author(s) and publisher(s) of the Document do not by this License
-give permission to use their names for publicity for or to assert or
-imply endorsement of any Modified Version.
-
-@item
-COMBINING DOCUMENTS
-
-You may combine the Document with other documents released under this
-License, under the terms defined in section 4 above for modified
-versions, provided that you include in the combination all of the
-Invariant Sections of all of the original documents, unmodified, and
-list them all as Invariant Sections of your combined work in its
-license notice, and that you preserve all their Warranty Disclaimers.
-
-The combined work need only contain one copy of this License, and
-multiple identical Invariant Sections may be replaced with a single
-copy.  If there are multiple Invariant Sections with the same name but
-different contents, make the title of each such section unique by
-adding at the end of it, in parentheses, the name of the original
-author or publisher of that section if known, or else a unique number.
-Make the same adjustment to the section titles in the list of
-Invariant Sections in the license notice of the combined work.
-
-In the combination, you must combine any sections Entitled ``History''
-in the various original documents, forming one section Entitled
-``History''; likewise combine any sections Entitled ``Acknowledgements'',
-and any sections Entitled ``Dedications''.  You must delete all
-sections Entitled ``Endorsements.''
-
-@item
-COLLECTIONS OF DOCUMENTS
-
-You may make a collection consisting of the Document and other documents
-released under this License, and replace the individual copies of this
-License in the various documents with a single copy that is included in
-the collection, provided that you follow the rules of this License for
-verbatim copying of each of the documents in all other respects.
-
-You may extract a single document from such a collection, and distribute
-it individually under this License, provided you insert a copy of this
-License into the extracted document, and follow this License in all
-other respects regarding verbatim copying of that document.
-
-@item
-AGGREGATION WITH INDEPENDENT WORKS
-
-A compilation of the Document or its derivatives with other separate
-and independent documents or works, in or on a volume of a storage or
-distribution medium, is called an ``aggregate'' if the copyright
-resulting from the compilation is not used to limit the legal rights
-of the compilation's users beyond what the individual works permit.
-When the Document is included in an aggregate, this License does not
-apply to the other works in the aggregate which are not themselves
-derivative works of the Document.
-
-If the Cover Text requirement of section 3 is applicable to these
-copies of the Document, then if the Document is less than one half of
-the entire aggregate, the Document's Cover Texts may be placed on
-covers that bracket the Document within the aggregate, or the
-electronic equivalent of covers if the Document is in electronic form.
-Otherwise they must appear on printed covers that bracket the whole
-aggregate.
-
-@item
-TRANSLATION
-
-Translation is considered a kind of modification, so you may
-distribute translations of the Document under the terms of section 4.
-Replacing Invariant Sections with translations requires special
-permission from their copyright holders, but you may include
-translations of some or all Invariant Sections in addition to the
-original versions of these Invariant Sections.  You may include a
-translation of this License, and all the license notices in the
-Document, and any Warranty Disclaimers, provided that you also include
-the original English version of this License and the original versions
-of those notices and disclaimers.  In case of a disagreement between
-the translation and the original version of this License or a notice
-or disclaimer, the original version will prevail.
-
-If a section in the Document is Entitled ``Acknowledgements'',
-``Dedications'', or ``History'', the requirement (section 4) to Preserve
-its Title (section 1) will typically require changing the actual
-title.
-
-@item
-TERMINATION
-
-You may not copy, modify, sublicense, or distribute the Document
-except as expressly provided under this License.  Any attempt
-otherwise to copy, modify, sublicense, or distribute it is void, and
-will automatically terminate your rights under this License.
-
-However, if you cease all violation of this License, then your license
-from a particular copyright holder is reinstated (a) provisionally,
-unless and until the copyright holder explicitly and finally
-terminates your license, and (b) permanently, if the copyright holder
-fails to notify you of the violation by some reasonable means prior to
-60 days after the cessation.
-
-Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-
-Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, receipt of a copy of some or all of the same material does
-not give you any rights to use it.
-
-@item
-FUTURE REVISIONS OF THIS LICENSE
-
-The Free Software Foundation may publish new, revised versions
-of the GNU Free Documentation 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.  See
-@uref{http://www.gnu.org/copyleft/}.
-
-Each version of the License is given a distinguishing version number.
-If the Document specifies that a particular numbered version of this
-License ``or any later version'' applies to it, you have the option of
-following the terms and conditions either of that specified version or
-of any later version that has been published (not as a draft) by the
-Free Software Foundation.  If the Document does not specify a version
-number of this License, you may choose any version ever published (not
-as a draft) by the Free Software Foundation.  If the Document
-specifies that a proxy can decide which future versions of this
-License can be used, that proxy's public statement of acceptance of a
-version permanently authorizes you to choose that version for the
-Document.
-
-@item
-RELICENSING
-
-``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any
-World Wide Web server that publishes copyrightable works and also
-provides prominent facilities for anybody to edit those works.  A
-public wiki that anybody can edit is an example of such a server.  A
-``Massive Multiauthor Collaboration'' (or ``MMC'') contained in the
-site means any set of copyrightable works thus published on the MMC
-site.
-
-``CC-BY-SA'' means the Creative Commons Attribution-Share Alike 3.0
-license published by Creative Commons Corporation, a not-for-profit
-corporation with a principal place of business in San Francisco,
-California, as well as future copyleft versions of that license
-published by that same organization.
-
-``Incorporate'' means to publish or republish a Document, in whole or
-in part, as part of another Document.
-
-An MMC is ``eligible for relicensing'' if it is licensed under this
-License, and if all works that were first published under this License
-somewhere other than this MMC, and subsequently incorporated in whole
-or in part into the MMC, (1) had no cover texts or invariant sections,
-and (2) were thus incorporated prior to November 1, 2008.
-
-The operator of an MMC Site may republish an MMC contained in the site
-under CC-BY-SA on the same site at any time before August 1, 2009,
-provided the MMC is eligible for relicensing.
-
-@end enumerate
-
-@page
-@heading ADDENDUM: How to use this License for your documents
-
-To use this License in a document you have written, include a copy of
-the License in the document and put the following copyright and
-license notices just after the title page:
-
-@smallexample
-@group
-  Copyright (C)  @var{year}  @var{your name}.
-  Permission is granted to copy, distribute and/or modify this document
-  under the terms of the GNU Free Documentation License, Version 1.3
-  or any later version published by the Free Software Foundation;
-  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
-  Texts.  A copy of the license is included in the section entitled ``GNU
-  Free Documentation License''.
-@end group
-@end smallexample
-
-If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
-replace the ``with@dots{}Texts.''@: line with this:
-
-@smallexample
-@group
-    with the Invariant Sections being @var{list their titles}, with
-    the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
-    being @var{list}.
-@end group
-@end smallexample
-
-If you have Invariant Sections without Cover Texts, or some other
-combination of the three, merge those two alternatives to suit the
-situation.
-
-If your document contains nontrivial examples of program code, we
-recommend releasing these examples in parallel under your choice of
-free software license, such as the GNU General Public License,
-to permit their use in free software.
-
-@c Local Variables:
-@c ispell-local-pdict: "ispell-dict"
-@c End:
diff --git a/doc/info/sleep-until.texinfo b/doc/info/sleep-until.texinfo
deleted file mode 100644
index 445b2e0..0000000
--- a/doc/info/sleep-until.texinfo
+++ /dev/null
@@ -1,121 +0,0 @@
-\input texinfo   @c -*-texinfo-*-
-
-@c %**start of header
-@setfilename sleep-until.info
-@settitle sleep-until
-@afourpaper
-@documentencoding UTF-8
-@documentlanguage en
-@finalout
-@c %**end of header
-
-
-@dircategory Miscellaneous
-@direntry
-* sleep-until: (sleep-until).        Sleep until a specified time
-@end direntry
-
-
-@copying
-Copyright @copyright{} 2015 Mattias Andrée
-
-@quotation
-Permission is granted to copy, distribute and/or modify this document
-under the terms of the GNU Free Documentation License, Version 1.3 or
-any later version published by the Free Software Foundation; with no
-Invariant Sections, with no Front-Cover Texts, and with no Back-Cover
-Texts. A copy of the license is included in the section entitled
-``GNU Free Documentation License''.
-@end quotation
-@end copying
-
-@ifnottex
-@node Top
-@top sleep-until -- Sleep until a specified time
-@insertcopying
-@end ifnottex
-
-@titlepage
-@title sleep-until
-@subtitle Sleep until a specified time
-@author by Mattias Andrée (maandree)
-
-@page
-@c @center `'
-@vskip 0pt plus 1filll
-@insertcopying
-@end titlepage
-
-@contents
-
-
-
-@menu
-* Overview::                        Brief overview of @command{sleep-until}.
-* Invoking::                        Invocation of @command{sleep-until}.
-* GNU Free Documentation License::  Copying and sharing this manual.
-@end menu
-
-
-
-@node Overview
-@chapter Overview
-
-Sleeps until a specified time. @command{sleep-until}
-only supports the time to be specified by number of
-seconds (and nanoseconds) since an epoch. The program
-supports multiple clocks: all clocks supported by
-timerfd.
-
-
-
-@node Invoking
-@chapter Invoking
-
-@command{sleep-until} takes any number of arguments,
-of two classes: clock name and time point. The last
-specified clock name and the highest time point will
-be used. The time point may be a floating-point number.
-
-If no time point is specified, the program will exit
-with exit value 0. Otherwise the process will terminate,
-with exit value 0, when the selected time has been
-reached.
-
-Note that it is not possible to wait on two or more
-clocks at the same time. Rather, you need invoke
-@command{sleep-until} multiple times with different
-clocks. This is because the order of the arguments
-must not be important.
-
-By default, the clock @code{CLOCK_REALTIME} is used.
-In this case, the process will terminate at the
-selected number of seconds of the Epoch
-(1970-(01)Jan-01 00:00:00), in UTC but not accounting
-for leap seconds.
-
-Some versions of @command{date} can be used to
-specify the time point in a convenient manner.
-
-The clock is select by the name of the clock.
-On Linux 4.2.2 the clock that can be used are:
-@itemize @bullet{}
-@item @code{CLOCK_REALTIME}
-@item @code{CLOCK_MONOTONIC}
-@item @code{CLOCK_BOOTTIME}
-@item @code{CLOCK_REALTIME_ALARM}
-@item @code{CLOCK_BOOTTIME_ALARM}
-@end itemize
-@noindent
-Note that the neither course clocks, @code{CLOCK_MONOTONIC_RAW}
-(the proper implementation of a monotonic clock), and
-@code{CLOCK_TAI} does not work.
-
-
-
-@node GNU Free Documentation License
-@appendix GNU Free Documentation License
-@include fdl.texinfo
-
-@bye
-
diff --git a/doc/man/sleep-until.1 b/doc/man/sleep-until.1
deleted file mode 100644
index 6672fcf..0000000
--- a/doc/man/sleep-until.1
+++ /dev/null
@@ -1,65 +0,0 @@
-.TH SLEEP-UNTIL 1
-.SH NAME
-sleep-until - sleeps until a specified time
-.SH SYNOPSIS
-.B sleep-until
-.IR clockname ...
-.IR timepoint ...
-.SH DESCRIPTION
-Pause until \fItimepoint\fP. \fItimepoint\fP is the number of
-seconds since Epoch, in UTC but not accounting for leap seconds,
-by default. If \fIclockname\fP is specifed, \fItimepoint\fP is
-the number of seconds since the zerotime of that clock.
-\fItimepoint\fP may be an arbitrary floating point number.
-Pause is continued when interrupted.
-.PP
-On Linux 4.2.2 the clocks that can be used are:
-.TP
-*
-\fBCLOCK_REALTIME\fP
-.TP
-*
-\fBCLOCK_MONOTONIC\fP
-.TP
-*
-\fBCLOCK_BOOTTIME\fP
-.TP
-*
-\fBCLOCK_REALTIME_ALARM\fP
-.TP
-*
-\fBCLOCK_BOOTTIME_ALARM\fP
-.PP
-Note that the neither course clocks, \fBCLOCK_MONOTONIC_RAW\fP
-(the proper implementation of a monotonic clock), and
-\fBCLOCK_TAI\fP does not work.
-.SH EXIT STATUS
-.TP
-0
-The command was successful.
-.TP
-1
-The command failed.
-.SH SEE ALSO
-.BR sleep (1),
-.BR date (1),
-.BR clock_gettime (3)
-.SH AUTHORS
-Principal author, Mattias Andrée.  See the COPYING file for the full
-list of authors.
-.SH COPYRIGHT
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU Affero General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-.PP
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU Affero General Public License for more details.
-.PP
-You should have received a copy of the GNU Affero General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
-.SH BUGS
-Please report bugs to https://github.com/maandree/sleep-until/issues or to
-maandree@member.fsf.org
diff --git a/sleep-until.1 b/sleep-until.1
new file mode 100644
index 0000000..c166d7a
--- /dev/null
+++ b/sleep-until.1
@@ -0,0 +1,47 @@
+.TH SLEEP-UNTIL 1
+.SH NAME
+sleep-until - sleep until a specified time
+.SH SYNOPSIS
+.B sleep-until
+.RI [ clockname
+|
+.IR timepoint ]\ ...
+.SH DESCRIPTION
+Pause until \fItimepoint\fP. \fItimepoint\fP is the number of
+seconds since Epoch, in UTC but not accounting for leap seconds,
+by default. If \fIclockname\fP is specifed, \fItimepoint\fP is
+the number of seconds since the zerotime of that clock.
+\fItimepoint\fP may be an arbitrary floating point number.
+Pause is continued when interrupted.
+.PP
+On Linux 4.2.2 the clocks that can be used are:
+.TP
+*
+\fBCLOCK_REALTIME\fP
+.TP
+*
+\fBCLOCK_MONOTONIC\fP
+.TP
+*
+\fBCLOCK_BOOTTIME\fP
+.TP
+*
+\fBCLOCK_REALTIME_ALARM\fP
+.TP
+*
+\fBCLOCK_BOOTTIME_ALARM\fP
+.PP
+Note that the neither course clocks, \fBCLOCK_MONOTONIC_RAW\fP
+(the proper implementation of a monotonic clock), and
+\fBCLOCK_TAI\fP does not work.
+.SH EXIT STATUS
+.TP
+0
+The command was successful.
+.TP
+1
+The command failed.
+.SH SEE ALSO
+.BR sleep (1),
+.BR date (1),
+.BR clock_gettime (3)
diff --git a/sleep-until.c b/sleep-until.c
new file mode 100644
index 0000000..88124ac
--- /dev/null
+++ b/sleep-until.c
@@ -0,0 +1,118 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/timerfd.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+int
+main(int argc, char *argv[])
+{
+	char *argv0;
+	char float_part[10];
+	struct itimerspec value;
+	struct itimerspec largest_value;
+	int i, fd = -1, clocks = 0;
+	uint64_t overrun;
+	int clockid = CLOCK_REALTIME;
+	const char *clockstr = "CLOCK_REALTIME";
+	char *p1, *p2, excess;
+	size_t len;
+
+	argv0 = *argv++, argc--;
+	if (*argv && **argv == '-') {
+		if (argv[0][1] == '-' && !argv[0][2]) {
+			argv++, argc--;
+		} else {
+			fprintf(stderr, "usage: %s [clock | timepoint] ...", argv0);
+			return 1;
+		}
+	}
+
+	if (!argc)
+		return 0;
+
+	memset(&value, 0, sizeof(value));
+	float_part[9] = '\0';
+	for (i = 0; i < argc; i++) {
+		p1 = argv[i];
+
+		if (strstr(p1, "CLOCK_") != p1)
+			goto parse_time;
+#define X(C)\
+		else if (!strcmp(p1, #C))\
+			clockid = C, clockstr = #C;
+#include "clocks.h"
+#undef X
+		else
+			clockid = -1, clockstr = "invalid";
+		clocks++;
+		continue;
+
+	parse_time:
+		if ((p2 = strchr(p1, '.')))
+			*p2++ = '\0';
+
+		value.it_value.tv_sec = (time_t)atoll(p1);
+
+		if (p2) {
+			len = strlen(p2);
+			memset(float_part, '0', 9 * sizeof(char));
+			excess = len > 9 ? p2[9] : '0';
+			len = len > 9 ? 9 : len;
+			memcpy(float_part + 9 - len, p2, len * sizeof(char));
+			value.it_value.tv_nsec = atol(float_part);
+			if ((excess >= '5') && (value.it_value.tv_nsec++ == 999999999L))
+				value.it_value.tv_nsec = 0, value.it_value.tv_sec++;
+		}
+
+		if (i == clocks)
+			largest_value = value;
+		else if (value.it_value.tv_sec > largest_value.it_value.tv_sec)
+			largest_value = value;
+		else if (value.it_value.tv_sec == largest_value.it_value.tv_sec)
+			if (value.it_value.tv_nsec > largest_value.it_value.tv_nsec)
+				largest_value = value;
+	}
+
+	if (clocks == argc)
+		return 0;
+
+	fd = timerfd_create(clockid, 0);
+	if (fd < 0)
+		goto fail;
+	if (timerfd_settime(fd, TFD_TIMER_ABSTIME, &largest_value, NULL))
+		goto fail;
+
+	if (clock_gettime(clockid, &(value.it_value)) == 0)
+		fprintf(stderr, "%s: sleeping until %lli.%09li (current time: %lli.%09li, clock: %s)\n",
+		        argv0, (long long int)(largest_value.it_value.tv_sec), largest_value.it_value.tv_nsec,
+		        (long long int)(value.it_value.tv_sec), value.it_value.tv_nsec, clockstr);
+  
+	for (;;) {
+		if (clock_gettime(clockid, &(value.it_value)))
+			goto fail;
+		if (value.it_value.tv_sec > largest_value.it_value.tv_sec)
+			break;
+		if (value.it_value.tv_sec == largest_value.it_value.tv_sec)
+			if (value.it_value.tv_nsec >= largest_value.it_value.tv_nsec)
+				break;
+		if (read(fd, &overrun, (size_t)8) < 8) {
+			if (errno == EINTR)
+				continue;
+			goto fail;
+		}
+	}
+
+	close(fd);
+	return 0;
+
+fail:
+	perror(argv0);
+	if (fd >= 0)
+		close(fd);
+	return 1;
+}
diff --git a/src/sleep-until.c b/src/sleep-until.c
deleted file mode 100644
index e06b552..0000000
--- a/src/sleep-until.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/**
- * sleep-until – Sleeps until a specified time
- * 
- * Copyright © 2015  Mattias Andrée (maandree@member.fsf.org)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- * 
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include <sys/timerfd.h>
-#include <string.h>
-#include <stdlib.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <errno.h>
-
-
-int main(int argc, char* argv[])
-{
-  char* argv0;
-  char float_part[10];
-  struct itimerspec value;
-  struct itimerspec largest_value;
-  int i, fd = -1, clocks = 0;
-  uint64_t _expirations;
-  int clockid = CLOCK_REALTIME;
-  const char* clockstr = "CLOCK_REALTIME";
-  
-  if (argc < 2)
-    return 0;
-  
-  argv0 = argv[0];
-  argc--, argv++;
-  
-  memset(&value, 0, sizeof(value));
-  float_part[9] = '\0';
-  for (i = 0; i < argc; i++)
-    {
-      char* p1 = argv[i];
-      char* p2;
-      char excess;
-      size_t len;
-      
-      if (strstr(p1, "CLOCK_") != p1)
-	goto parse_time;
-$>cat /usr/include/bits/time.h | grep '^ *# *define  *CLOCK_' | grep -Po 'CLOCK_[^[:blank:]]*' |
-$>while read c; do
-      else if (!strcmp(p1, "${c}"))
-	clockid = ${c}, clockstr = "${c}";
-$>done
-      else
-	clockid = -1, clockstr = "invalid";
-      clocks++;
-      continue;
-      
-    parse_time:
-      if ((p2 = strchr(p1, '.')))
-	*p2++ = '\0';
-      
-      value.it_value.tv_sec = (time_t)atoll(p1);
-      
-      if (p2)
-	{
-	  len = strlen(p2);
-	  memset(float_part, '0', 9 * sizeof(char));
-	  excess = len > 9 ? p2[9] : '0';
-	  len = len > 9 ? 9 : len;
-	  memcpy(float_part + 9 - len, p2, len * sizeof(char));
-	  value.it_value.tv_nsec = atol(float_part);
-	  if ((excess >= '5') && (value.it_value.tv_nsec++ == 999999999L))
-	    value.it_value.tv_nsec = 0, value.it_value.tv_sec++;
-	}
-      
-      if (i == clocks)
-	largest_value = value;
-      else if (value.it_value.tv_sec > largest_value.it_value.tv_sec)
-	largest_value = value;
-      else if (value.it_value.tv_sec == largest_value.it_value.tv_sec)
-	if (value.it_value.tv_nsec > largest_value.it_value.tv_nsec)
-	  largest_value = value;
-    }
-  
-  if (clocks == argc)
-    return 0;
-  
-  fd = timerfd_create(clockid, 0);
-  if (fd < 0)
-    goto fail;
-  if (timerfd_settime(fd, TFD_TIMER_ABSTIME, &largest_value, NULL))
-    goto fail;
-  
-  if (clock_gettime(clockid, &(value.it_value)) == 0)
-    fprintf(stderr, "%s: sleeping until %lli.%09li (current time: %lli.%09li, clock: %s)\n",
-	    argv0, (long long int)(largest_value.it_value.tv_sec), largest_value.it_value.tv_nsec,
-	    (long long int)(value.it_value.tv_sec), value.it_value.tv_nsec, clockstr);
-  
-  for (;;)
-    {
-      if (clock_gettime(clockid, &(value.it_value)))
-	goto fail;
-      if (value.it_value.tv_sec > largest_value.it_value.tv_sec)
-        break;
-      if (value.it_value.tv_sec == largest_value.it_value.tv_sec)
-	if (value.it_value.tv_nsec >= largest_value.it_value.tv_nsec)
-	  break;
-      if (read(fd, &_expirations, (size_t)8) < 8)
-	{
-	  if (errno == EINTR)
-	    continue;
-	  goto fail;
-	}
-    }
-  
-  close(fd);
-  return 0;
- fail:
-  perror(argv0);
-  if (fd >= 0)  close(fd);
-  return 1;
-}
-