made dj options no longer alphabetized

dj.1: debug output clarification
dj.1: -c: grammar
2024-04-28 20:42:44 -06:00 · 2024-04-18 08:44:44 -06:00 · 2024-04-18 08:41:55 -06:00 · 2024-04-18 08:40:29 -06:00 · 2024-04-18 08:38:48 -06:00 · 2024-04-18 08:36:01 -06:00
29 changed files with 1495 additions and 1345 deletions
--- a/COPYING.GPL
+++ b/COPYING.GPL
@@ -1,674 +0,0 @@
                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.
                            Preamble
  The GNU General Public License is a free, copyleft license for
 software and other kinds of works.
  The licenses for most software and other practical works are designed
 to take away your freedom to share and change the works.  By contrast,
 the GNU General Public License is 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.  We, the Free Software Foundation, use the
 GNU General Public License for most of our software; it applies also to
 any other work released this way by its authors.  You can apply it to
 your programs, too.
  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.
  To protect your rights, we need to prevent others from denying you
 these rights or asking you to surrender the rights.  Therefore, you have
 certain responsibilities if you distribute copies of the software, or if
 you modify it: responsibilities to respect the freedom of others.
  For example, if you distribute copies of such a program, whether
 gratis or for a fee, you must pass on to the recipients the same
 freedoms that you received.  You must make sure that they, too, receive
 or can get the source code.  And you must show them these terms so they
 know their rights.
  Developers that use the GNU GPL protect your rights with two steps:
 (1) assert copyright on the software, and (2) offer you this License
 giving you legal permission to copy, distribute and/or modify it.
  For the developers' and authors' protection, the GPL clearly explains
 that there is no warranty for this free software.  For both users' and
 authors' sake, the GPL requires that modified versions be marked as
 changed, so that their problems will not be attributed erroneously to
 authors of previous versions.
  Some devices are designed to deny users access to install or run
 modified versions of the software inside them, although the manufacturer
 can do so.  This is fundamentally incompatible with the aim of
 protecting users' freedom to change the software.  The systematic
 pattern of such abuse occurs in the area of products for individuals to
 use, which is precisely where it is most unacceptable.  Therefore, we
 have designed this version of the GPL to prohibit the practice for those
 products.  If such problems arise substantially in other domains, we
 stand ready to extend this provision to those domains in future versions
 of the GPL, as needed to protect the freedom of users.
  Finally, every program is threatened constantly by software patents.
 States should not allow patents to restrict development and use of
 software on general-purpose computers, but in those that do, we wish to
 avoid the special danger that patents applied to a free program could
 make it effectively proprietary.  To prevent this, the GPL assures that
 patents cannot be used to render the program non-free.
  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 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.
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  A "covered work" means either the unmodified Program or a work based
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  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
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  All rights granted under this License are granted for the term of
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 permission to run the unmodified Program.  The output from running a
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 terms of section 4, provided that you also meet all of these conditions:
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    copy of the Corresponding Source for all the software in the
    product that is covered by this License, on a durable physical
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    more than your reasonable cost of physically performing this
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 License by making exceptions from one or more of its conditions.
 Additional permissions that are applicable to the entire Program shall
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  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
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  You may not propagate or modify a covered work except as expressly
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 reinstated permanently if the copyright holder notifies you of the
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  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
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 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
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 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
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  Each contributor grants you a non-exclusive, worldwide, royalty-free
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  In the following three paragraphs, a "patent license" is any express
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 sue for patent infringement).  To "grant" such a patent license to a
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 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
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 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.
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 in the business of distributing software, under which you make payment
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 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. Use with the GNU Affero General Public License.
  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 Affero 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 special requirements of the GNU Affero General Public License,
 section 13, concerning interaction through a network will apply to the
 combination as such.
  14. Revised Versions of this License.
  The Free Software Foundation may publish revised and/or new versions of
 the GNU 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 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 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
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 to choose that version for the Program.
  Later license versions may give you additional or different
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 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
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 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
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 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
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  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 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 General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 Also add information on how to contact you by electronic and paper mail.
  If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
    <program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.
 The hypothetical commands `show w' and `show c' should show the appropriate
 parts of the General Public License.  Of course, your program's commands
 might be different; for a GUI interface, you would use an "about box".
  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 GPL, see
 <https://www.gnu.org/licenses/>.
  The GNU General Public License does not permit incorporating your program
 into proprietary programs.  If your program is a subroutine library, you
 may consider it more useful to permit linking proprietary applications with
 the library.  If this is what you want to do, use the GNU Lesser General
 Public License instead of this License.  But first, please read
 <https://www.gnu.org/licenses/why-not-lgpl.html>.
--- a/COPYING.LESSER
+++ b/COPYING.LESSER
@@ -1,165 +0,0 @@
                   GNU LESSER GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007
 Copyright (C) 2007 Free Software Foundation, Inc. <https://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.
--- a/80
+++ b/80
@@ -1,7 +1,6 @@
 # Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 # Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
 # Copyright (c) 2023 Sasha Koshka <sashakoshka@tebibyte.media>
 # Copyright (c) 2024 Aaditya Aryal <aryalaadi123@gmail.com>
 # SPDX-License-Identifier: FSFAP
 #
 # Copying and distribution of this file, with or without modification, are
@@ -9,26 +8,16 @@
 # notice are preserved.  This file is offered as-is, without any warranty.
 .POSIX:
 # if using BSD make(1), remove these pragmas because they break it
 .PRAGMA: posix_202x # future POSIX standard support à la pdpmake(1)
 .PRAGMA: command_comment # breaks without this?
-DESTDIR ?= dist
+PREFIX=/usr/local
 PREFIX ?= /usr/local
-SYSEXITS != printf '\043include <sysexits.h>\n' | cpp -M - | sed 's/ /\n/g' \
+CC=cc
-	| sed -n 's/sysexits\.h//p' || printf 'include\n'
+RUSTC=rustc
 CC ?= cc
 RUSTC ?= rustc
 RUSTLIBS = --extern getopt=build/o/libgetopt.rlib \
 	--extern sysexits=build/o/libsysexits.rlib \
 	--extern strerror=build/o/libstrerror.rlib
 CFLAGS += -I$(SYSEXITS)
 .PHONY: all
-all: dj false fop hru intcmp mm npc rpn scrut str strcmp swab true
+all: dj false fop hru intcmp mm rpn scrut str strcmp swab true
 build:
 	# keep build/include until bindgen(1) has stdin support
@@ -37,39 +26,36 @@ build:
 .PHONY: clean
 clean:
-	rm -rf build dist
+	rm -rf build/ dist/
 dist: all
-	mkdir -p $(DESTDIR)/$(PREFIX)/bin $(DESTDIR)/$(PREFIX)/share/man/man1
+	mkdir -p dist/bin dist/share/man/man1
-	cp build/bin/* $(DESTDIR)/$(PREFIX)/bin
+	cp build/bin/* dist/bin/
-	cp docs/*.1 $(DESTDIR)/$(PREFIX)/share/man/man1
+	cp docs/*.1 dist/share/man/man1/
 .PHONY: install
 install: dist
-	cp -r $(DESTDIR)/* /
+	mkdir -p $(PREFIX)
 	cp -r dist/* $(PREFIX)/
 .PHONY: test
 test: build
 	tests/posix-compat.sh
 	$(RUSTC) --test src/getopt-rs/lib.rs -o build/test/getopt
-.PHONY: rustlibs
+build/o/libsysexits.rlib: build
 rustlibs: build/o/libsysexits.rlib build/o/libgetopt.rlib \
 	build/o/libstrerror.rlib
 build/o/libgetopt.rlib: build src/getopt.rs
 	$(RUSTC) $(RUSTFLAGS) --crate-type=lib --crate-name=getopt \
 		-o $@ src/getopt.rs
 build/o/libstrerror.rlib: build src/strerror.rs
 	$(RUSTC) $(RUSTFLAGS) --crate-type=lib -o $@ \
 		src/strerror.rs
 build/o/libsysexits.rlib: build $(SYSEXITS)sysexits.h
 	# bandage solution until bindgen(1) gets stdin support
-	printf '#define EXIT_FAILURE 1\n' | cat - $(SYSEXITS)sysexits.h \
+	printf '#define EXIT_FAILURE 1\n' | cat - include/sysexits.h \
 		> build/include/sysexits.h 
 	bindgen --default-macro-constant-type signed --use-core --formatter=none \
-		build/include/sysexits.h | $(RUSTC) $(RUSTFLAGS) --crate-type lib -o $@ -
+		"$$(printf '#include <sysexits.h>\n' \
 			| cpp -M -idirafter "build/include" - \
 			| sed 's/ /\n/g' | grep sysexits.h)" \
 		| $(RUSTC) $(RUSTFLAGS) --crate-type lib -o build/o/libsysexits.rlib -
 build/o/libgetopt.rlib: src/getopt-rs/lib.rs
 	$(RUSTC) $(RUSTFLAGS) --crate-type=lib --crate-name=getopt \
 		-o build/o/libgetopt.rlib src/getopt-rs/lib.rs
 .PHONY: dj
 dj: build/bin/dj
@@ -83,13 +69,17 @@ build/bin/false: src/false.c build
 .PHONY: fop
 fop: build/bin/fop
-build/bin/fop: src/fop.rs build rustlibs
+build/bin/fop: src/fop.rs build build/o/libgetopt.rlib build/o/libsysexits.rlib
-	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/fop.rs
+	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
 		--extern sysexits=build/o/libsysexits.rlib \
 		-o $@ src/fop.rs
 .PHONY: hru
 hru: build/bin/hru
-build/bin/hru: src/hru.rs build rustlibs 
+build/bin/hru: src/hru.rs build build/o/libgetopt.rlib build/o/libsysexits.rlib
-	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/hru.rs
+	$(RUSTC) $(RUSTFLAGS) --extern getopt=build/o/libgetopt.rlib \
 		--extern sysexits=build/o/libsysexits.rlib \
 		-o $@ src/hru.rs
 .PHONY: intcmp
 intcmp: build/bin/intcmp
@@ -101,16 +91,12 @@ mm: build/bin/mm
 build/bin/mm: src/mm.c build
 	$(CC) $(CFLAGS) -o $@ src/mm.c
 .PHONY: npc
 npc: build/bin/npc
 build/bin/npc: src/npc.c build
 	$(CC) $(CFLAGAS) -o $@ src/npc.c
 .PHONY: rpn
 rpn: build/bin/rpn
-build/bin/rpn: src/rpn.rs build rustlibs
+build/bin/rpn: src/rpn.rs build build/o/libsysexits.rlib
-	$(RUSTC) $(RUSTFLAGS) $(RUSTLIBS) -o $@ src/rpn.rs
+	$(RUSTC) $(RUSTFLAGS) \
 		--extern sysexits=build/o/libsysexits.rlib \
 		-o $@ src/rpn.rs
 .PHONY: scrut
 scrut: build/bin/scrut
--- a/docs/dj.1
+++ b/docs/dj.1
@@ -1,4 +1,5 @@
 .\" Copyright (c) 2024 DTB <trinity@trinity.moe>
 .\" Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -44,87 +45,139 @@ dj
 .B output offset
 .R ])
-.SH USAGE
+.SH OPTIONS
 The
 .B -i
-option takes a path as an argument to open and use in place of standard input.
+.RS
-The
+Takes a file path as an argument to open and use as an input.
-.B -o
+.RE
-option does the same in place of standard output. Dj does not truncate output
+
 files and instead writes over the bytes in the existing file.
 .PP
 The
 .B -b
-option takes a numeric argument as the size in bytes of the input buffer and
+.RS
-the
+Takes a numeric argument as the size in bytes of the input buffer, with the
-.B -B
+default being 1024 bytes or one kibibyte (KiB).
-option does the same for the output buffer, the default for both being 1024
+.RE
-bytes, or one kibibyte (KiB).
+
 .PP
 The
 .B -s
-option takes a numeric argument as the number of bytes to skip into the input
+.RS
-before starting to read, and the
+Takes a numeric argument as the number of bytes to skip into the input
 before starting to read. If the standard input is used, bytes read to this point
 are discarded.
 .RE
 .B -o
 .RS
 Takes a file path as an argument to open and use as an output.
 .RE
 .B -B
 .RS
 Does the same as
 .B -b
 but for the output buffer.
 .RE
 .B -S
-option skips a number of bytes through the output before starting to write from
+.RS
-the input. If the input is a stream the bytes are read and discarded. If the
+Skips a number of bytes through the output before starting to write from
-output is a stream, nul characters are printed.
+the input. If the output is a stream, null characters are printed.
-.PP
+.RE
-The
+
 .B -a
-option takes one argument of one byte in length and pads the input buffer with
+.RS
-that byte in the event that a read doesn't fill the input buffer, and the
+Accepts a single literal byte with which input buffer is padded in the event
-.B -A
+of an incomplete read from the input file.
-option takes no arguments and pads with nuls.
+.RE
-The
+
 .B -c
-option specifies an amount of reads to make, and if 0 (the default) dj will
+.RS
-continue reading until a partial or empty read.
+Specifies a number of reads to make. If set to zero (the default), reading will
-.PP
+continue until a partial or empty read is encountered.
-On a partial or empty read, dj prints a diagnostic message (unless the
+.RE
-.B -q
+
-option is specified) and exits (unless the
+.B -A
-.B -n
+.RS
-option is specified, in which case only two consecutive empty reads will cause
+If the output is a stream, null bytes are printed. This option is equivalent to
-dj to exit).
+specifying
-At exit, usage statistics are printed unless the option
+.B -a
-.B -q
+with a null byte instead of a character.
-is specified a second time. The
+.RE
 .B -d
 .RS
 Prints invocation information before program execution as described in the
 DIAGNOSTICS section below. Each invocation increments the debug level of the
 program.
 .RE
 .B -H
-option will make these diagnostics human-readable.
+.RS
 Prints diagnostics messages in a human-readable manner as described in the
 DIAGNOSTICS section below.
 .RE
 .B -n
 .RS
 Retries failed reads once more before exiting.
 .RE
 .B -q
 .RS
 Suppresses error messages which print when a read or write is partial or
 empty. Each invocation decrements the debug level of the program.
 .RE
 .SH STANDARD INPUT
 The standard input shall be used as an input if no inputs are specified one or
 more of the input files is “-”.
 .SH DIAGNOSTICS
-The
+On a partial or empty read, a diagnostic message is printed (unless the
-.B -d
+.B -q
-option prints all information, user-specified or otherwise, before program
+option is specified) and the program exits (unless the
-execution.
+.B -n
-.PP
+option is specified.
-When dj exits, by default statistics are printed for input and output to
+
-standard error in the following format:
+By default statistics are printed for input and output to the standard error in
-.PP
+the following format:
 .RS
 .R {records read} {ASCII unit separator} {partial records read}
 .R {ASCII record separator} {records written} {ASCII unit separator}
 .R {partial records written} {ASCII group separator} {bytes read}
 .R {ASCII record separator} {bytes written} {ASCII file separator}
-.PP
+.RE
-If the
+
 This format for diagnostic output is designed to be machine-parseable for
 convenience. For a more human-readable format, the
 .B -H
-option is specified dj instead uses this following format:
+option may be specified. In this event, the following format is used instead:
-.PP
+
 .RS
 .R {records read} '+' {partial records read} '>' {records written}
 .R '+' {partial records written} ';' {bytes read} '>' {bytes written}
 .R {ASCII line feed}
-.PP
+.RE
-The
+
-.B -q
+If the
-option suppresses error messages which print when a read or write is partial or
+.B -d
-empty and when used twice suppresses diagnostic output entirely.
+option is specified, debug output will be printed at the beginning of execution.
-.PP
+This debug information contains information regarding how the program was
-In non-recoverable errors that don't pertain to dj's read-write cycle, a
+invoked. The following example is the result of running the program with
-diagnostic message is printed and dj exits with the appropriate sysexits(3)
+.B -d
-status.
+as the only argument:
 .RS
 .R argv0=dj
 .R in=<stdin>      ibs=1024        skip=0  align=ff       count=0
 .R out=<stdout>    obs=1024        seek=0  debug= 3       noerror=0
 .RE
 In non-recoverable errors that don’t pertain to the read-write cycle, a
 diagnostic message is printed and the program exits with the appropriate
 sysexits.h(3) status.
 .SH BUGS
@@ -136,25 +189,29 @@ expected (the product of the count multiplied by the input block size). If the
 or
 .B -A
 options are used this could make data written nonsensical.
-.PP
+
 Many lowercase options have capitalized variants and vice-versa which can be
 confusing. Capitalized options tend to affect output or are more intense
 versions of lowercase options.
 .SH CAVEATS
 Existing files are not truncated on ouput and are instead overwritten.
 .SH RATIONALE
-Dj was modeled after the dd utility specified in POSIX but adds additional
+This program was based on the dd(1p) utility as specified in POSIX. While
-features: typical option formatting, allowing seeks to be specified in bytes
+character conversion may have been the original intent of dd(1p), it is
 irrelevant to its modern use. Because of this, it eschews character conversion
 and adds typical option formatting, allowing seeks to be specified in bytes
 rather than in blocks, allowing arbitrary bytes as padding, and printing in a
-format that's easy to parse for machines. It also neglects character
+format that’s easy to parse for machines.
 conversion, which may be dd's original intent but is irrelevant to its modern
 use.
 .SH COPYRIGHT
-Copyright (C) 2023 DTB. License AGPLv3+: GNU AGPL version 3 or later
+Copyright © 2023 DTB. License AGPLv3+: GNU AGPL version 3 or later
 <https://gnu.org/licenses/agpl.html>.
 .SH SEE ALSO
-dd(1)
+dd(1p)
--- a/docs/false.1
+++ b/docs/false.1
@@ -1,5 +1,5 @@
 .\" Copyright (c) 2022, 2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -12,14 +12,13 @@ false \(en do nothing, unsuccessfully
 .SH DESCRIPTION
-False does nothing regardless of operands or standard input.
+Do nothing regardless of operands or standard input.
-False will always return an exit code of 1.
+An exit code of 1 will always be returned.
 .SH RATIONALE
-False exists for the construction of control flow and loops based on a failure.
+In POSIX.1-2017, false(1p) exists for the construction of control flow and loops
-
+based on a failure. This implementation functions as described in that standard.
 False functions as described in POSIX.1-2017.
 .SH AUTHOR
--- a/docs/fop.1
+++ b/docs/fop.1
@@ -0,0 +1,60 @@
 .\" Copyright (c) 2024 DTB <trinity@trinity.moe>
 .\" Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
 .TH fop 1
 .SH NAME
 fop \(en field operator
 .SH SYNOPSIS
 fop
 .RB ( -d )
 .RB [ delimiter ]
 .RB index 
 .RB program...
 .SH DESCRIPTION
 Performs operations on specified fields in input data.
 .SH OPTIONS
 .B -d
 .RS
 Sets a delimiter by which the input data will be split into fields. The default
 is an ASCII record separator (␞).
 .RE
 .SH STANDARD INPUT
 Data will be read from the standard input.
 .SH CAVEATS
 Field indices are zero-indexed, which may be unexpected behavior for some users.
 .SH RATIONALE
 With the assumption that tools will output data separated with ASCII field
 separators, there is 
 The idea for this utility originated in the fact that GNU ls(1) utility contains
 a
 .B -h
 option which enables human-readable units in file size outputs. This
 functionality was broken out into hru(1), but there was no easy way to modify
 the field in the ouput of ls(1p) without a new tool.
 .SH COPYRIGHT
 Copyright © 2024 Emma Tebibyte. License AGPLv3+: GNU AGPL version 3 or later
 <https://gnu.org/licenses/agpl.html>.
 .SH SEE ALSO
 sed(1p)
--- a/docs/hru.1
+++ b/docs/hru.1
@@ -3,7 +3,7 @@
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
-.TH rpn 1
+.TH hru 1
 .SH NAME
@@ -15,18 +15,20 @@ hru
 .SH DESCRIPTION
-Hru reads byte counts in the form of whole numbers from the standard input and
+Convert counts to higher units.
-writes to the standard output the same number converted one of the units of data
+
-defined by the International System of Units.
+The program will read byte counts in the form of whole numbers from the standard
 input and write to the standard output the same number converted to a higher 
 unit of data as defined by the International System of Units.
 The program will convert the byte count to the highest unit possible where the
 value is greater than one.
 .SH DIAGNOSTICS
-If encountering non-integer characters in the standard input, hru will exit with
+If encountering non-integer characters in the standard input, the program will
-the appropriate error code as defined by sysexits.h(3) and print an error
+exit with the appropriate error code as defined by sysexits.h(3) and print an
-message.
+error message.
 .SH RATIONALE
@@ -39,9 +41,9 @@ program.
 .SH STANDARDS
-Hru follows the standard unit prefixes as specified by the Bureau International
+The standard unit prefixes as specified by the Bureau International des Poids
-des Poids et Mesures (BIPM) in the ninth edition of The International System of
+et Mesures (BIPM) in the ninth edition of The International System of Units
-Units (SI).
+(SI) are utilized for the ouput of conversions.
 .SH AUTHOR
--- a/docs/intcmp.1
+++ b/docs/intcmp.1
@@ -1,5 +1,5 @@
 .\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -13,45 +13,59 @@ intcmp \(en compare integers
 .SH SYNOPSIS
 intcmp
-.RB ( -eghl )
+.RB ( -egl )
 .RB [ integer ]
 .RB [ integer... ]
 .SH DESCRIPTION
-Intcmp compares integers.
+Compare integers to each other.
 .SH USAGE
-The -e option permits given integers to be equal to each other. If combined
+.B -e
-with -g or -l, only adjacent integers in the argument sequence can be equal.
+.RS
-.PP
+Permits given integers to be equal to each other.
-The -g option permits a given integer to be greater than the following integer.
+.RE
-.PP
+
-The -l option permits a given integer to be less than the following integer.
+.B -g
-.PP
+.RS
 Permits a given integer to be greater than the following integer.
 .RE
 .B -l
 .RS
 Permits a given integer to be less than the following integer.
 .RE
 .SH EXAMPLES
 It may help to think of the -e, -g, and -l options as equivalent to the
 infix algebraic “=”, “>”, and “<” operators respectively, with each option
-putting its symbol between every given integer. For example,
+putting its symbol between every given integer. The following example is
 equivalent to evaluating “1 < 2 < 3”:
 .RS
 .R intcmp -l 1 2 3
-is equivalent to evaluating "1 < 2 < 3".
+.RE
 .SH DIAGNOSTICS
-Intcmp exits 0 for a valid expression and 1 for an invalid expression.
+The program will exit with a status code of 0 for a valid expression and with a
-.PP
+code of 1 for an invalid expression.
-Intcmp prints a debug message and exits with the appropriate sysexits(3) error
+
-code in the event of an error.
+In the event of an error, a debug message will be printed and the program will
 exit with the appropriate sysexits.h(3) error code.
 .SH BUGS
 There are multiple ways to express compound comparisons; “less than or equal
 to” can be -le or -el, for example.
-.PP
+
 The inequality comparison is -gl or -lg for “less than or greater than”; this
 is elegant but unintuitive.
-.PP
+
-egl, "equal to or less than or greater than", exits 0 no matter what for valid
+-egl, “equal to or less than or greater than”, exits 0 no matter what for valid
 program usage and may be abused to function as an integer validator.
 Use str(1) instead.
@@ -61,7 +75,7 @@ The traditional tool for integer comparisons in POSIX and other Unix shells has
 been test(1). This tool also handles string comparisons and file scrutiny.
 These parts of its functionality have been broken out into multiple utilities.
-Strcmp’s functionality may be performed on a POSIX-compliant system with
+This program’s functionality may be performed on a POSIX-compliant system with
 test(1p).
 .SH AUTHOR
--- a/docs/mm.1
+++ b/docs/mm.1
@@ -20,51 +20,63 @@ mm
 .SH DESCRIPTION
-Mm catenates input files and writes them to the start of each output file.
+Catenate input files and write them to the start of each output file or stream.
 .SH OPTIONS
 Mm, upon receiving the
 .B -a
-option, will open subsequent outputs for appending rather than updating.
+.RS
-.PP
+Opens subsequent outputs for appending rather than updating.
-The
+.RE
-.B -i
+
 option opens a path as an input. Without any inputs specified mm will use
 standard input. Standard input itself can be specified by giving the path '-'.
 .PP
 The
 .B -o
 option opens a path as an output. Without any outputs specified mm will use
 standard output. Standard output itself can be specified by giving the
 path '-'. Standard error itself can be specified with the
 .B -e
-option.
+.RS
-.PP
+Use the standard error as an output.
-The
+.RE
 .B -i
 .RS
 Opens a path as an input. Without any inputs specified mm will use the
 standard input. The standard input shall be used as an input if one or more of
 the input files is “-”.
 .RE
 .B -o
 .RS
 Opens a path as an output. Without any outputs specified mm will use the
 standard output. The standard output shall be used as an output if one or more
 of the output files is “-”.
 .RE
 .B -u
-option ensures neither input or output will be buffered.
+.RS
-.PP
+Ensures neither input or output will be buffered.
-The
+.RE
 .B -n
-option tells mm to ignore SIGINT signals.
+.RS
 Causes SIGINT signals to be ignored.
 .RE
 .SH DIAGNOSTICS
 If an output can no longer be written mm prints a diagnostic message, ceases
 writing to that particular output, and if there are more outputs specified,
 continues, eventually exiting unsuccessfully.
 .PP
 On error mm prints a diagnostic message and exits with the appropriate
 sysexits.h(3) status.
-.SH BUGS
+When an error is encountered, diagnostic message is printed and the program
 exits with the appropriate sysexits.h(3) status.
-Mm does not truncate existing files, which may lead to unexpected results.
+.SH CAVEATS
 Existing files are not truncated on ouput and are instead overwritten.
 .SH RATIONALE
-Mm was modeled after the cat and tee utilities specified in POSIX.
+The cat(1p) and tee(1p) programs specified in POSIX together provide similar
 functionality. The separation of the two sets of functionality into separate
 APIs seemed unncessary.
 .SH COPYRIGHT
--- a/docs/npc.1
+++ b/docs/npc.1
@@ -1,5 +1,5 @@
 .\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -13,43 +13,50 @@ npc \(en show non-printing characters
 .SH SYNOPSIS
 npc
-.RB ( -eht )
+.RB ( -et )
 .SH DESCRIPTION
-Npc reads from standard input and writes to standard output, replacing non-
+Print normally non-printing characters.
-printing characters with printable equivalents. Control characters print as a
+
-carat ('^') followed by the character '@' through '_' corresponding to the
+The program reads from standard input and writes to standard output, replacing
-character replaced (e.g. control-X becomes "^X"). The delete character (0x7F)
+non-printing characters with printable equivalents. Control characters print as
-becomes "^?". Characters with the high bit set (>127) are printed as "M-"
+a carat ('^') followed by the character '@' through '_' corresponding to the
 character replaced (e.g. control-X becomes '^X'). The delete character (0x7F)
 becomes '^?'. Characters with the high bit set (>127) are printed as 'M-'
 followed by the graphical representation for the same character without the
 high bit set.
-.PP
+
-The
+.SH USAGE
 .B -e
-option prints a currency sign ('$') before each line ending.
+.RS
-.PP
+Prints a currency sign ('$') before each line ending.
-The
+.RE
 .B -t
-option prints tab characters as "^I" rather than a literal horizontal tab.
+.RS
 Prints tab characters as '^I' rather than a literal horizontal tab.
 .RE
 .SH DIAGNOSTICS
-Npc prints a debug message and exits with the appropriate sysexits(3) error
+In the event of an error, a debug message will be printed and the program will
-code in the event of an error, otherwise it exits successfully.
+exit with the appropriate sysexits.h(3) error code.
 .SH BUGS
-Npc operates in single-byte chunks regardless of intended encoding.
+The program operates in single-byte chunks regardless of intended encoding.
 .SH RATIONALE
 POSIX currently lacks a way to display non-printing characters in the terminal
-using a standard tool. A popular extension to cat(1p), the -v option, is the
+using a standard tool. A popular extension to cat(1p), the
-bandage solution GNU and other software suites use.
+.B -v
 option, is the bandage solution GNU and other software suites use.
-This functionality should be a separate tool because its usefulness extends
+This functionality is a separate tool because its usefulness extends beyond that
-beyond that of cat(1p).
+of cat(1p).
 .SH AUTHOR
--- a/docs/rpn.1
+++ b/docs/rpn.1
@@ -17,10 +17,13 @@ rpn
 .SH DESCRIPTION
-Rpn evaluates reverse polish notation expressions either read from the standard
+Evaluate reverse polish notation.
 input or parsed from provided arguments. See the STANDARD INPUT section.
-Upon evaluation, rpn will print the resulting number on the stack to the
+The program evaluates reverse polish notation expressions either read from the
 standard input or parsed from provided arguments. See the STANDARD INPUT
 section.
 Upon evaluation, the program will print the resulting number on the stack to the
 standard output. Any further specified numbers will be placed at the end of the
 stack.
@@ -28,14 +31,16 @@ For information on for reverse polish notation syntax, see rpn(7).
 .SH STANDARD INPUT
-If arguments are passed to rpn, it interprets them as an expression to be
+If arguments are passed , they are interpreted as an expression to be evaluated.
-evaluated. Otherwise, it reads whitespace-delimited numbers and operations from
+Otherwise, it reads whitespace-delimited numbers and operations from the
-the standard input.
+standard input.
 .SH DIAGNOSTICS
-If encountering a syntax error, rpn will exit with the appropriate error code
+In the event of a syntax error, the program will print an
-as defined by sysexits.h(3) and print an error message.
+
 In the event of an error, a debug message will be printed and the program will
 exit with the appropriate sysexits.h(3) error code.
 .SH CAVEATS
@@ -44,7 +49,7 @@ with the IEEE Standard for Floating Point Arithmetic (IEEE 754), floating-point
 arithmetic has rounding errors. This is somewhat curbed by using the
 machine epsilon as provided by the Rust standard library to which to round
 numbers. Because of this, variation is expected in the number of decimal places 
-rpn can handle based on the platform and hardware of any given machine.
+the program can handle based on the platform and hardware of any given machine.
 .SH RATIONALE
--- a/docs/scrut.1
+++ b/docs/scrut.1
@@ -1,4 +1,5 @@
 .\" Copyright (c) 2024 DTB <trinity@trinity.moe>
 .\" Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -17,62 +18,92 @@ scrut
 .SH DESCRIPTION
-Scrut determines if given files comply with the opted requirements.
+Determine if files comply with requirements.
 .SH OPTIONS
 .B -b
 requires the given files to exist and be block special files.
 .PP
 .B -c
 requires the given files to exist and be character special files.
 .PP
 .B -d
 requires the given files to exist and be directories.
 .PP
 .B -e
 requires the given files to exist, and is redundant to any other option.
 .PP
 .B -e
 requires the given files to exist and be regular files.
 .PP
 .B -g
 requires the given files to exist and have their set group ID flags set.
 .PP
 .B -k
 requires the given files to exist and have their sticky bit set.
 .PP
 .B -p
 requires the given files to exist and be named pipes.
 .PP
 .B -r
 requires the given files to exist and be readable.
 .PP
 .B -u
 requires the given files to exist and have their set user ID flags set.
 .PP
 .B -w
 requires the given files to exist and be writable.
 .PP
 .B -x
 requires the given files to exist and be executable.
 .PP
 .B -L
-requires the given files to exist and be symbolic links.
+.RS
-.PP
+Requires the given files to exist and be symbolic links.
 .RE
 .B -S
-requires the given files to exist and be sockets.
+.RS
 Requires the given files to exist and be sockets.
 .RE
 .B -b
 .RS
 Requires the given files to exist and be block special files.
 .RE
 .B -c
 .RS
 Requires the given files to exist and be character special files.
 .RE
 .B -d
 .RS
 Requires the given files to exist and be directories.
 .RE
 .B -e
 .RS
 Requires the given files to exist, and is redundant to any other option.
 .RE
 .B -e
 .RS
 Requires the given files to exist and be regular files.
 .RE
 .B -g
 .RS
 Requires the given files to exist and have their set group ID flags set.
 .RE
 .B -k
 .RS
 Requires the given files to exist and have their sticky bit set.
 .RE
 .B -p
 .RS
 Requires the given files to exist and be named pipes.
 .RE
 .B -r
 .RS
 Requires the given files to exist and be readable.
 .RE
 .B -u
 .RS
 Requires the given files to exist and have their set user ID flags set.
 .RE
 .B -w
 .RS
 Requires the given files to exist and be writable.
 .RE
 .B -x
 .RS
 Requires the given files to exist and be executable.
 .RE
 .SH EXIT STATUS
-Scrut prints a debug message and exits unsuccessfully with the appropriate
+If the given files comply with the specified requirements, the program will exit
-sysexits.h(3) error code if invoked incorrectly. Scrut exits successfully if
+successfully. If not, it exits unsuccessfully.
-the given files comply with their requirements and unsuccessfully otherwise.
+
 When invoked incorrectly, a debug message will be printed and the program will
 exit with the appropriate sysexits.h(3) error code.
 .SH STANDARDS
-Scrut is nearly compatible with POSIX's test utility though it is narrower in
+The test(1p) utility contains functionality that was broken out into separate
-scope. Notably, the
+programs. Thus, the scope of this program is narrower than it. Notably, the
 .B -h
 option is now invalid and therefore shows usage information instead of being an
 alias to the modern
--- a/docs/str.1
+++ b/docs/str.1
@@ -1,5 +1,5 @@
 .\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -18,30 +18,27 @@ str
 .SH DESCRIPTION
-Str tests each character in an arbitrary quantity of string arguments against
+Test string arguments.
-the function of the same name within ctype(3).
+
 The tests in this program are equivalent to the functions with the same names in
 ctype.h(0p) and are the methods by which string arguments are tested.
 .SH DIAGNOSTICS
-Str exits successfully if all tests pass and unsuccessfully if a test failed.
+If all tests pass, the program will exit with an exit code of 0. If any of the
-.PP
+tests fail, the program will exit unsuccessfully with an error code of 1.
 Str will exit unsuccessfully if a string is empty, as none of its contents
 passed the test.
 .PP
 Str will print a message to standard error and exit unsuccessfully if used
 improperly.
-.SH DEPRECATED FEATURES
+An empty string will cause an unsuccessful exit as none of its contents pass any
 tests.
-Str used to have an "isvalue" type as an extension to ctype(3). This was
+When invoked incorrectly, a debug message will be printed and the program will
-removed in favor of using strcmp(1) to compare strings against the empty string
+exit with the appropriate sysexits.h(3) error code.
 ('').
 .SH BUGS
-There's no way of knowing which argument failed the test without re-testing
+There’s no way of knowing which argument failed the test without re-testing
 arguments individually.
-.PP
+
 If a character in a string isn't valid ASCII str will exit unsuccessfully.
 .SH AUTHOR
--- a/docs/strcmp.1
+++ b/docs/strcmp.1
@@ -1,5 +1,5 @@
 .\" Copyright (c) 2023–2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -18,26 +18,27 @@ strcmp
 .SH DESCRIPTION
-Strcmp checks whether the given strings are the same.
+Check whether string arguments are the same.
-Strcmp exits successfully if the strings are identical. Otherwise, strcmp exits
+
-with the value 1 if an earlier string has a greater byte value than a later
+.SH DIAGNOSTICS
-string (e.g.
+
 The program will exit successfully if the strings are identical. Otherwise, it
 exits with the value 1 if an earlier string has a greater byte value than a
 later string (e.g.
 .R strcmp b a
 )
 and 255 if an earlier string has a lesser byte value (e.g.
 .R strcmp a b
 ).
-.SH DIAGNOSTICS
+When invoked incorrectly, a debug message will be printed and the program will
-
+exit with the appropriate sysexits.h(3) error code.
 Strcmp will print an error message and exit unsuccessfully with a status
 described in sysexits(3) if used incorrectly (given less than two operands).
 .SH UNICODE
-Strcmp will exit unsuccessfully if the given strings are not identical;
+The program will exit unsuccessfully if the given strings are not identical;
-Unicode strings may need to be normalized if the intent is to check visual
+therefore, Unicode strings may need to be normalized if the intent is to check
-similarity and not byte similarity.
+visual similarity and not byte similarity.
 .SH RATIONALE
@@ -45,7 +46,7 @@ The traditional tool for string comparisons in POSIX and other Unix shells has
 been test(1). This tool also handles integer comparisons and file scrutiny.
 These parts of its functionality have been broken out into multiple utilities.
-Strcmp’s functionality may be performed on a POSIX-compliant system with
+This program’s functionality may be performed on a POSIX-compliant system with
 test(1p).
 .SH AUTHOR
--- a/docs/swab.1
+++ b/docs/swab.1
@@ -1,4 +1,5 @@
 .\" Copyright (c) 2024 DTB <trinity@trinity.moe>
 .\" Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -20,46 +21,51 @@ swab
 .SH USAGE
-Swab swaps the latter and former halves of a block of bytes.
+Swap the latter and former halves of a block of bytes.
 .SH OPTIONS
 .B -f
 .RS
 Ignore system call interruptions.
 .RE
 .B -w
 .RS
 Configures the word size; that is, the size in bytes of the block size
 on which to operate. By default the word size is 2. The word size must be
 cleanly divisible by 2, otherwise the block of bytes being processed can't be
 halved.
 .RE
 .SH EXAMPLES
 The following sh(1p) line:
 .RS
 .R printf 'hello world!\n' | swab
 .RE
 Produces the following output:
 .RS
 .R ehll oowlr!d
-
+.RE
 .SH OPTIONS
 The
 .B -f
 option ignores system call interruptions.
 .PP
 The
 .B -w
 option configures the word size; that is, the size in bytes of the block size
 on which to operate. By default the word size is 2. The word size must be
 cleanly divisible by 2, otherwise the block of bytes being processed can't be
 halved.
 .SH DIAGNOSTICS
-If an error is encountered in input, output, or invocation, a diagnostic
+In the event of an error, a debug message will be printed and the program will
-message will be written to standard error and swab will exit with the
+exit with the appropriate sysexits.h(3) error code.
 appropriate status from sysexits.h(3).
 .SH RATIONALE
-Swab was modeled after the
+This program was modeled and named after the
 .R conv=swab
-functionality specified in the POSIX dd utility but additionally allows the
+functionality specified in the dd(1p) utility. It additionally allows the word
-word size to be configured.
+size to be configured.
-.PP
+
-Swab is useful for fixing the endianness of binary files produced on other
+This functionality is useful for fixing the endianness of binary files produced
-machines.
+on other machines.
 .SH COPYRIGHT
--- a/docs/true.1
+++ b/docs/true.1
@@ -1,5 +1,5 @@
 .\" Copyright (c) 2022, 2024 DTB <trinity@trinity.moe>
-.\" Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
+.\" Copyright (c) 2023–2024 Emma Tebibyte <emma@tebibyte.media>
 .\"
 .\" This work is licensed under CC BY-SA 4.0. To see a copy of this license,
 .\" visit <http://creativecommons.org/licenses/by-sa/4.0/>.
@@ -12,14 +12,13 @@ true \(en do nothing, successfully
 .SH DESCRIPTION
-True does nothing regardless of operands or standard input.
+Do nothing regardless of operands or standard input.
-True will always return an exit code of 0.
+An exit code of 0 will always be returned.
 .SH RATIONALE
-True exists for the construction of control flow and loops based on a success.
+In POSIX.1-2017, true(1p) exists for the construction of control flow and loops
-
+based on a success. This implementation functions as described in that standard.
 True functions as described in POSIX.1-2017.
 .SH AUTHOR
--- a/src/fop.rs
+++ b/src/fop.rs
@@ -22,52 +22,40 @@ use std::{
 	process::{ Command, exit, Stdio },
 };
 extern crate getopt;
 extern crate strerror;
 extern crate sysexits;
 extern crate getopt;
-use getopt::GetOpt;
+use getopt::{ Opt, Parser };
 use strerror::StrError;
 use sysexits::{ EX_DATAERR, EX_IOERR, EX_UNAVAILABLE, EX_USAGE };
 fn main() {
 	let argv = args().collect::<Vec<String>>();
 	let mut d = '␞';
-	let usage = format!(
+	let mut arg_parser = Parser::new(&argv, "d:");
 		"Usage: {} [-d delimiter] index command [args...]",
 		argv[0],
 	);
 	let mut index_arg = 0;
-	while let Some(opt) = argv.getopt("d:") {
+	while let Some(opt) = arg_parser.next() {
 		match opt {
-			Ok(o) => {
+			Ok(Opt('d', Some(arg))) => {
 				/* unwrap because Err(OptError::MissingArg) will be returned if
 				 * o.arg is None */
 				let arg = o.arg.unwrap();
 				let arg_char = arg.chars().collect::<Vec<char>>();
 				if arg_char.len() > 1 {
 					eprintln!("{}: {}: Not a character.", argv[0], arg);
 					exit(EX_USAGE);
 				} else { d = arg_char[0]; }
 				index_arg = o.ind as usize;
 			},
-			Err(_) => {
+			_ => {},
 				eprintln!("{}", usage);
 				exit(EX_USAGE);
 			}
 		};
 	}
-	let command_arg = index_arg as usize + 1;
+	let index_arg = arg_parser.index();
 	let command_arg = arg_parser.index() + 1;
 	argv.get(command_arg).unwrap_or_else(|| {
-		eprintln!("{}", usage);
+		eprintln!("Usage: {} [-d delimiter] index command [args...]", argv[0]);
 		exit(EX_USAGE);
 	});
 	let index = argv[index_arg].parse::<usize>().unwrap_or_else(|e| {
-		eprintln!("{}: {}: {}", argv[0], argv[1], e);
+		eprintln!("{}: {}: {}.", argv[0], argv[1], e);
 		exit(EX_DATAERR);
 	});
@@ -87,13 +75,13 @@ fn main() {
 		.stdout(Stdio::piped())
 		.spawn()
 		.unwrap_or_else( |e| {
-			eprintln!("{}: {}: {}", argv[0], argv[command_arg], e.strerror());
+			eprintln!("{}: {}: {}.", argv[0], argv[command_arg], e);
 			exit(EX_UNAVAILABLE);
 		});
 	let field = fields.get(index).unwrap_or_else(|| {
 		eprintln!(
-			"{}: {}: No such index in input",
+			"{}: {}: No such index in input.",
 			argv[0],
 			index.to_string(),
 		);
@@ -106,7 +94,7 @@ fn main() {
 	}
 	let output = spawned.wait_with_output().unwrap_or_else(|e| {
-		eprintln!("{}: {}: {}", argv[0], argv[command_arg], e.strerror());
+		eprintln!("{}: {}: {}.", argv[0], argv[command_arg], e);
 		exit(EX_IOERR);
 	});
@@ -115,7 +103,7 @@ fn main() {
 	if replace.pop() != Some(b'\n') { replace = output.stdout; }
 	let new_field = String::from_utf8(replace).unwrap_or_else(|e| {
-		eprintln!("{}: {}: {}", argv[0], argv[command_arg], e);
+		eprintln!("{}: {}: {}.", argv[0], argv[command_arg], e);
 		exit(EX_IOERR);
 	});
@@ -123,8 +111,8 @@ fn main() {
 	stdout().write_all(
 		fields.join(&d.to_string()).as_bytes()
-	).unwrap_or_else(|e| {
+	).unwrap_or_else(|e|{
-		eprintln!("{}: {}", argv[0], e.strerror());
+		eprintln!("{}: {}.", argv[0], e);
 		exit(EX_IOERR);
 	});
 }
--- a/src/getopt-rs/error.rs
+++ b/src/getopt-rs/error.rs
@@ -0,0 +1,95 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 use std::{ error, fmt };
 use crate::ErrorKind::{ self, * };
 /// A basic error type for [`Parser`](struct.Parser.html)
 #[derive(Debug, Eq, PartialEq)]
 pub struct Error {
    culprit: char,
    kind: ErrorKind,
 }
 impl Error {
    /// Creates a new error using a known kind and the character that caused the
 	/// issue.
    pub fn new(kind: ErrorKind, culprit: char) -> Self {
        Self { culprit, kind }
    }
    /// Returns the [`ErrorKind`](enum.ErrorKind.html) for this error.
    pub fn kind(self) -> ErrorKind {
        self.kind
    }
 }
 impl fmt::Display for Error {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match self.kind {
            MissingArgument => write!(
 				f, 
 				"option requires an argument -- {:?}",
 				self.culprit,
 			),
            UnknownOption => write!(f, "unknown option -- {:?}", self.culprit),
        }
    }
 }
 impl error::Error for Error {
    fn source(&self) -> Option<&(dyn error::Error + 'static)> {
        None
    }
 }
--- a/src/getopt-rs/errorkind.rs
+++ b/src/getopt-rs/errorkind.rs
@@ -0,0 +1,61 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 /// What kinds of errors [`Parser`](struct.Parser.html) can return.
 #[derive(Debug, Eq, PartialEq)]
 pub enum ErrorKind {
    /// An argument was not found for an option that was expecting one.
    MissingArgument,
    /// An unknown option character was encountered.
    UnknownOption,
 }
--- a/src/getopt-rs/lib.rs
+++ b/src/getopt-rs/lib.rs
@@ -0,0 +1,72 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 //! # getopt
 //!
 //! `getopt` provides a minimal, (essentially) POSIX-compliant option parser.
 pub use crate::{
 	error::Error,
 	errorkind::ErrorKind,
 	opt::Opt,
 	parser::Parser,
 	result::Result
 };
 mod error;
 mod errorkind;
 mod opt;
 mod parser;
 mod result;
 #[cfg(test)]
 mod tests;
--- a/src/getopt-rs/opt.rs
+++ b/src/getopt-rs/opt.rs
@@ -0,0 +1,89 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 use std::fmt;
 /// A single option.
 ///
 /// For `Opt(x, y)`:
 ///   - `x` is the character representing the option.
 ///   - `y` is `Some` string, or `None` if no argument was expected.
 ///
 /// # Example
 ///
 /// ```
 /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
 /// use getopt::Opt;
 ///
 /// // args = ["program", "-abc", "foo"];
 /// # let args: Vec<String> = vec!["program", "-abc", "foo"]
 /// #     .into_iter()
 /// #     .map(String::from)
 /// #     .collect();
 /// let optstring = "ab:c";
 /// let mut opts = getopt::Parser::new(&args, optstring);
 ///
 /// assert_eq!(Opt('a', None), opts.next().transpose()?.unwrap());
 /// assert_eq!(Opt('b', Some("c".to_string())), opts.next().transpose()?.unwrap());
 /// assert_eq!(None, opts.next().transpose()?);
 /// # Ok(())
 /// # }
 /// ```
 #[derive(Debug, Eq, Ord, PartialEq, PartialOrd)]
 pub struct Opt(pub char, pub Option<String>);
 impl fmt::Display for Opt {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "Opt({:?}, {:?})", self.0, self.1)
    }
 }
--- a/src/getopt-rs/parser.rs
+++ b/src/getopt-rs/parser.rs
@@ -0,0 +1,382 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 use std::collections::HashMap;
 use crate::{ error::Error, errorkind::ErrorKind, opt::Opt, result::Result };
 /// The core of the `getopt` crate.
 ///
 /// `Parser` is implemented as an iterator over the options present in the given
 /// argument vector.
 ///
 /// The method [`next`](#method.next) does the heavy lifting.
 ///
 /// # Examples
 ///
 /// ## Simplified usage:
 /// ```
 /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
 /// use getopt::Opt;
 ///
 /// // args = ["program", "-abc", "foo"];
 /// # let args: Vec<String> = vec!["program", "-abc", "foo"]
 /// #     .into_iter()
 /// #     .map(String::from)
 /// #     .collect();
 /// let mut opts = getopt::Parser::new(&args, "ab:c");
 ///
 /// assert_eq!(Some(Opt('a', None)), opts.next().transpose()?);
 /// assert_eq!(1, opts.index());
 /// assert_eq!(Some(Opt('b', Some("c".to_string()))), opts.next().transpose()?);
 /// assert_eq!(2, opts.index());
 /// assert_eq!(None, opts.next());
 /// assert_eq!(2, opts.index());
 /// assert_eq!("foo", args[opts.index()]);
 /// # Ok(())
 /// # }
 /// ```
 ///
 /// ## A more idiomatic example:
 /// ```
 /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
 /// use getopt::Opt;
 ///
 /// // args = ["program", "-abc", "-d", "foo", "-e", "bar"];
 /// # let mut args: Vec<String> = vec!["program", "-abc", "-d", "foo", "-e", "bar"]
 /// #     .into_iter()
 /// #     .map(String::from)
 /// #     .collect();
 /// let mut opts = getopt::Parser::new(&args, "ab:cd:e");
 ///
 /// let mut a_flag = false;
 /// let mut b_flag = String::new();
 /// let mut c_flag = false;
 /// let mut d_flag = String::new();
 /// let mut e_flag = false;
 ///
 /// loop {
 ///     match opts.next().transpose()? {
 ///         None => break,
 ///         Some(opt) => match opt {
 ///             Opt('a', None) => a_flag = true,
 ///             Opt('b', Some(arg)) => b_flag = arg.clone(),
 ///             Opt('c', None) => c_flag = true,
 ///             Opt('d', Some(arg)) => d_flag = arg.clone(),
 ///             Opt('e', None) => e_flag = true,
 ///             _ => unreachable!(),
 ///         },
 ///     }
 /// }
 ///
 /// let new_args = args.split_off(opts.index());
 ///
 /// assert_eq!(true, a_flag);
 /// assert_eq!("c", b_flag);
 /// assert_eq!(false, c_flag);
 /// assert_eq!("foo", d_flag);
 /// assert_eq!(true, e_flag);
 ///
 /// assert_eq!(1, new_args.len());
 /// assert_eq!("bar", new_args.first().unwrap());
 /// # Ok(())
 /// # }
 /// ```
 #[derive(Debug, Eq, PartialEq)]
 pub struct Parser {
    opts: HashMap<char, bool>,
    args: Vec<Vec<char>>,
    index: usize,
    point: usize,
 }
 impl Parser {
    /// Create a new `Parser`, which will process the arguments in `args`
 	/// according to the options specified in `optstring`.
    ///
    /// For compatibility with
 	/// [`std::env::args`](https://doc.rust-lang.org/std/env/fn.args.html),
    /// valid options are expected to begin at the second element of `args`, and
 	/// `index` is
    /// initialised to `1`.
    /// If `args` is structured differently, be sure to call
 	/// [`set_index`](#method.set_index) before the first invocation of
 	/// [`next`](#method.next).
    ///
    /// `optstring` is a string of recognised option characters; if a character
 	/// is followed by a colon (`:`), that option takes an argument.
    ///
    /// # Note:
    /// Transforming the OS-specific argument strings into a vector of `String`s
 	/// is the sole responsibility of the calling program, as it involves some
 	/// level of potential information loss (which this crate does not presume
 	/// to handle unilaterally) and error handling (which would complicate the
 	/// interface).
    pub fn new(args: &[String], optstring: &str) -> Self {
        let optstring: Vec<char> = optstring.chars().collect();
        let mut opts = HashMap::new();
        let mut i = 0;
        let len = optstring.len();
        while i < len {
            let j = i + 1;
            if j < len && optstring[j] == ':' {
                opts.insert(optstring[i], true);
                i += 1;
            } else {
                opts.insert(optstring[i], false);
            }
            i += 1;
        }
        Self {
            opts,
            // "explode" the args into a vector of character vectors, to allow
 			// indexing
            args: args.iter().map(|e| e.chars().collect()).collect(),
            index: 1,
            point: 0,
        }
    }
    /// Return the current `index` of the parser.
    ///
    /// `args[index]` will always point to the the next element of `args`; when
 	/// the parser is
    /// finished with an element, it will increment `index`.
    ///
    /// After the last option has been parsed (and [`next`](#method.next) is
 	/// returning `None`),
    /// `index` will point to the first non-option argument.
    pub fn index(&self) -> usize {
        self.index
    }
    // `point` must be reset to 0 whenever `index` is changed
    /// Modify the current `index` of the parser.
    pub fn set_index(&mut self, value: usize) {
        self.index = value;
        self.point = 0;
    }
    /// Increment the current `index` of the parser.
    ///
    /// This use case is common enough to warrant its own optimised method.
    pub fn incr_index(&mut self) {
        self.index += 1;
        self.point = 0;
    }
 }
 impl Iterator for Parser {
    type Item = Result<Opt>;
    /// Returns the next option, if any.
    ///
    /// Returns an [`Error`](struct.Error.html) if an unexpected option is
 	/// encountered or if an
    /// expected argument is not found.
    ///
    /// Parsing stops at the first non-hyphenated argument; or at the first
 	/// argument matching "-";
    /// or after the first argument matching "--".
    ///
    /// When no more options are available, `next` returns `None`.
    ///
    /// # Examples
    ///
    /// ## "-"
    /// ```
    /// use getopt::Parser;
    ///
    /// // args = ["program", "-", "-a"];
    /// # let args: Vec<String> = vec!["program", "-", "-a"]
    /// #     .into_iter()
    /// #     .map(String::from)
    /// #     .collect();
    /// let mut opts = Parser::new(&args, "a");
    ///
    /// assert_eq!(None, opts.next());
    /// assert_eq!("-", args[opts.index()]);
    /// ```
    ///
    /// ## "--"
    /// ```
    /// use getopt::Parser;
    ///
    /// // args = ["program", "--", "-a"];
    /// # let args: Vec<String> = vec!["program", "--", "-a"]
    /// #     .into_iter()
    /// #     .map(String::from)
    /// #     .collect();
    /// let mut opts = Parser::new(&args, "a");
    ///
    /// assert_eq!(None, opts.next());
    /// assert_eq!("-a", args[opts.index()]);
    /// ```
    ///
    /// ## Unexpected option:
    /// ```
    /// use getopt::Parser;
    ///
    /// // args = ["program", "-b"];
    /// # let args: Vec<String> = vec!["program", "-b"]
    /// #     .into_iter()
    /// #     .map(String::from)
    /// #     .collect();
    /// let mut opts = Parser::new(&args, "a");
    ///
    /// assert_eq!(
    ///     "unknown option -- 'b'".to_string(),
    ///     opts.next().unwrap().unwrap_err().to_string()
    /// );
    /// ```
    ///
    /// ## Missing argument:
    /// ```
    /// use getopt::Parser;
    ///
    /// // args = ["program", "-a"];
    /// # let args: Vec<String> = vec!["program", "-a"]
    /// #     .into_iter()
    /// #     .map(String::from)
    /// #     .collect();
    /// let mut opts = Parser::new(&args, "a:");
    ///
    /// assert_eq!(
    ///     "option requires an argument -- 'a'".to_string(),
    ///     opts.next().unwrap().unwrap_err().to_string()
    /// );
    /// ```
    fn next(&mut self) -> Option<Result<Opt>> {
        if self.point == 0 {
            /*
             * Rationale excerpts below taken verbatim from "The Open Group Base
 			 * Specifications Issue 7, 2018 edition", IEEE Std 1003.1-2017
 			 * (Revision of IEEE Std 1003.1-2008).
             * Copyright © 2001-2018 IEEE and The Open Group.
             */
            /*
             * If, when getopt() is called:
             *      argv[optind]    is a null pointer
             *      *argv[optind]   is not the character '-'
             *      argv[optind]    points to the string "-"
             * getopt() shall return -1 without changing optind.
             */
            if self.index >= self.args.len()
                || self.args[self.index].is_empty()
                || self.args[self.index][0] != '-'
                || self.args[self.index].len() == 1
            {
                return None;
            }
            /*
             * If:
             *      argv[optind]    points to the string "--"
             * getopt() shall return -1 after incrementing index.
             */
            if self.args[self.index][1] == '-' && self.args[self.index].len() == 2 {
                self.incr_index();
                return None;
            }
            // move past the starting '-'
            self.point += 1;
        }
        let opt = self.args[self.index][self.point];
        self.point += 1;
        match self.opts.get(&opt) {
            None => {
                if self.point >= self.args[self.index].len() {
                    self.incr_index();
                }
                Some(Err(Error::new(ErrorKind::UnknownOption, opt)))
            }
            Some(false) => {
                if self.point >= self.args[self.index].len() {
                    self.incr_index();
                }
                Some(Ok(Opt(opt, None)))
            }
            Some(true) => {
                let arg: String = if self.point >= self.args[self.index].len() {
                    self.incr_index();
                    if self.index >= self.args.len() {
                        return Some(Err(Error::new(
 									ErrorKind::MissingArgument,
 									opt,
 								)));
                    }
                    self.args[self.index].iter().collect()
                } else {
                    self.args[self.index]
                        .clone()
                        .split_off(self.point)
                        .iter()
                        .collect()
                };
                self.incr_index();
                Some(Ok(Opt(opt, Some(arg))))
            }
        }
    }
 }
--- a/src/getopt-rs/result.rs
+++ b/src/getopt-rs/result.rs
@@ -0,0 +1,59 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 use std::result;
 use crate::error::Error;
 /// A specialized `Result` type for use with [`Parser`](struct.Parser.html)
 pub type Result<T> = result::Result<T, Error>;
--- a/src/getopt-rs/tests.rs
+++ b/src/getopt-rs/tests.rs
@@ -0,0 +1,228 @@
 /*
 * Copyright (c) 2023 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: AGPL-3.0-or-later
 *
 * 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 https://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and permission
 * notice:
 *     The Clear BSD License
 *
 *     Copyright © 2017-2023 David Wildasin
 *     All rights reserved.
 *
 *     Redistribution and use in source and binary forms, with or without
 *     modification, are permitted (subject to the limitations in the disclaimer
 *     below) provided that the following conditions are met:
 *
 *          * Redistributions of source code must retain the above copyright
 *          notice, this list of conditions, and the following disclaimer.
 *
 *          * Redistributions in binary form must reproduce the above copyright
 *          notice, this list of conditions, and the following disclaimer in the
 *          documentation and/or other materials provided with the distribution.
 *
 *          * Neither the name of the copyright holder nor the names of its
 *          contributors may be used to endorse or promote products derived from
 *          this software without specific prior written permission.
 *
 *     NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
 *     BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
 *     CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 *     BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 *     FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *     HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *     SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 *     TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 *     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 *     LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 *     NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 *     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 use crate::{Opt, Parser};
 macro_rules! basic_test {
    ($name:ident, $expect:expr, $next:expr, [$($arg:expr),+], $optstr:expr) => (
        #[test]
        fn $name() -> Result<(), String> {
            let expect: Option<Opt> = $expect;
            let args: Vec<String> = vec![$($arg),+]
 				.into_iter()
 				.map(String::from)
 				.collect();
            let next: Option<String> = $next;
            let mut opts = Parser::new(&args, $optstr);
            match opts.next().transpose() {
                Err(error) => {
                    return Err(format!("next() returned {:?}", error))
                },
                Ok(actual) => if actual != expect {
                    return Err(
 						format!("expected {:?}; got {:?}", expect, actual)
 					)
                },
            };
            match next {
                None => if opts.index() < args.len() {
                    return Err(format!(
 							"expected end of args; got {:?}", args[opts.index()]
 					))
                },
                Some(n) => if args[opts.index()] != n {
                    return Err(format!(
 							"next arg: expected {:?}; got {:?}",
 							n,
 							args[opts.index()]
 					))
                },
            };
            Ok(())
        }
    )
 }
 #[rustfmt::skip] basic_test!(
 	blank_arg, None, Some(String::new()), ["x", ""], "a"
 );
 #[rustfmt::skip] basic_test!(
 	double_dash, None, Some("-a".to_string()), ["x", "--", "-a", "foo"], "a"
 );
 #[rustfmt::skip] basic_test!(no_opts_1, None, None, ["x"], "a");
 #[rustfmt::skip] basic_test!(
 	no_opts_2, None, Some("foo".to_string()), ["x", "foo"], "a"
 );
 #[rustfmt::skip] basic_test!(
 	no_opts_3, None, Some("foo".to_string()), ["x", "foo", "-a"], "a"
 );
 #[rustfmt::skip] basic_test!(
 	single_dash, None, Some("-".to_string()), ["x", "-", "-a", "foo"], "a"
 );
 #[rustfmt::skip] basic_test!(
 	single_opt,
 	Some(Opt('a', None)),
 	Some("foo".to_string()),
 	["x", "-a", "foo"],
 	"a"
 );
 #[rustfmt::skip] basic_test!(
 	single_optarg,
 	Some(Opt('a', Some("foo".to_string()))),
 	None,
 	["x", "-a", "foo"],
 	"a:"
 );
 macro_rules! error_test {
    ($name:ident, $expect:expr, [$($arg:expr),+], $optstr:expr) => (
        #[test]
        fn $name() -> Result<(), String> {
            let expect: String = $expect.to_string();
            let args: Vec<String> = vec![$($arg),+]
 				.into_iter()
 				.map(String::from)
 				.collect();
            let mut opts = Parser::new(&args, $optstr);
            match opts.next() {
                None => {
                    return Err(format!(
 							"unexpected successful response: end of options"
 					))
                },
                Some(Err(actual)) => {
                    let actual = actual.to_string();
                    if actual != expect {
                        return Err(
 							format!("expected {:?}; got {:?}", expect, actual)
 						);
                    }
                },
                Some(Ok(opt)) => {
                    return Err(
 						format!("unexpected successful response: {:?}", opt)
 					)
                },
            };
            Ok(())
        }
    )
 }
 #[rustfmt::skip] error_test!(
 	bad_opt,
 	"unknown option -- 'b'",
 	["x", "-b"],
 	"a"
 );
 #[rustfmt::skip] error_test!(
 	missing_optarg,
 	"option requires an argument -- 'a'",
 	["x", "-a"],
 	"a:"
 );
 #[test]
 fn multiple() -> Result<(), String> {
    let args: Vec<String> = vec!["x", "-abc", "-d", "foo", "-e", "bar"]
        .into_iter()
        .map(String::from)
        .collect();
    let optstring = "ab:d:e".to_string();
    let mut opts = Parser::new(&args, &optstring);
    macro_rules! check_result {
        ($expect:expr) => {
            let expect: Option<Opt> = $expect;
            match opts.next().transpose() {
                Err(error) => {
 					return Err(format!("next() returned {:?}", error));
 				},
                Ok(actual) => {
                    if actual != expect {
                        return Err(
 							format!("expected {:?}; got {:?}", expect, actual)
 						);
                    }
                }
            };
        };
    }
    check_result!(Some(Opt('a', None)));
    check_result!(Some(Opt('b', Some("c".to_string()))));
    check_result!(Some(Opt('d', Some("foo".to_string()))));
    check_result!(Some(Opt('e', None)));
    check_result!(None);
    Ok(())
 }
 #[test]
 fn continue_after_error() {
    let args: Vec<String> = vec!["x", "-z", "-abc"]
        .into_iter()
        .map(String::from)
        .collect();
    let optstring = "ab:d:e".to_string();
    for _opt in Parser::new(&args, &optstring) {
        // do nothing, should not panic
    }
 }
--- a/src/getopt.rs
+++ b/src/getopt.rs
@@ -1,118 +0,0 @@
 /*
 * Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: LGPL-3.0-or-later
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU Lesser 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 Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see https://www.gnu.org/licenses/.
 */
 use std::ffi::{ c_int, c_char, CString, CStr };
 pub struct Opt {
 	pub arg: Option<String>,
 	pub ind: i32,
 	pub opt: String,
 }
 pub enum OptError {
 	MissingArg(String),
 	UnknownOpt(String),
 }
 /* function signature */
 pub trait GetOpt {
 	fn getopt(&self, optstring: &str) -> Option<Result<Opt, OptError>>;
 }
 impl GetOpt for Vec<String> {
    fn getopt(&self, optstring: &str) -> Option<Result<Opt, OptError>> {
        let c_strings: Vec<_> = self
 			.iter()
 			.cloned()
 			.map(CString::new)
 			.map(Result::unwrap)
 			.collect();
 		/* these operations must be separated out into separate operations so
 		 * the CStrings can live long enough */
        let argv: Vec<_> = c_strings.iter().map(|x| x.as_ptr()).collect();
        let argv_ptr = argv.as_ptr() as *const *mut c_char;
        let opts = CString::new(optstring).unwrap().into_raw();
        let len = self.len() as c_int;
        unsafe { // TODO: enable optind modification
            match getopt(len, argv_ptr, opts) { 
 				/* From getopt(3p):
 				 *
 				 * The getopt() function shall return the next option character
 				 * specified on the command line.
 				 *
 				 * A <colon> (':') shall be returned if getopt() detects a
 				 * missing argument and the first character of optstring was a
 				 * <colon> (':').
 				 *
 				 * A <question-mark> ('?') shall be returned if getopt()
 				 * encounters an option character not in optstring or detects a
 				 * missing argument and the first character of optstring was not
 				 * a <colon> (':').
 				 *
 				 * Otherwise, getopt() shall return -1 when all command line
 				 * options are parsed. */
                58 => { /* numerical ASCII value for ':' */
 					Some(Err(OptError::MissingArg(optopt.to_string())))
 				},
                63 => { /* numerical ASCII value for '?' */
 					Some(Err(OptError::UnknownOpt(optopt.to_string())))
 				},
 				/* From getopt(3p):
 				 *
 				 * If, when getopt() is called:
 				 *
 				 * argv[optind]  is a null pointer
 				 * *argv[optind]  is not the character -
 				 * argv[optind]  points to the string "-"
 				 *
 				 * getopt() shall return -1 without changing optind.  If:
 				 *
 				 * argv[optind]   points to the string "--"
 				 *
 				 * getopt() shall return -1 after incrementing optind. */
                -1 => return None,
                opt => {
 					let arg = CStr::from_ptr(optarg)
 						.to_string_lossy()
 						.into_owned();
 					Some(Ok(Opt {
 						arg: Some(arg), /* opt argument */
 						ind: optind, /* opt index */
 						opt: opt.to_string(), /* option itself */
 					}))
 				},
            }
        }
    }
 }
 /* binding to getopt(3p) */
 extern "C" {
 	static mut optarg: *mut c_char;
 	static mut _opterr: c_int;
 	static mut optind: c_int;
 	static mut optopt: c_int;
 	fn getopt(
 		___argc: c_int,
 		___argv: *const *mut c_char,
 		__shortopts: *const c_char,
 	) -> c_int;
 }
--- a/src/hru.rs
+++ b/src/hru.rs
@@ -23,10 +23,8 @@ use std::{
 	process::{ ExitCode, exit },
 };
 extern crate strerror;
 extern crate sysexits;
 use strerror::StrError;
 use sysexits::{ EX_DATAERR, EX_IOERR, EX_SOFTWARE };
 const LIST: [(u32, &str); 10] = [
@@ -51,7 +49,7 @@ fn convert(input: u128) -> Result<(f64, (u32, &'static str)), String> {
 		let c = match 10_u128.checked_pow(n) {
 			Some(c) => c,
 			None => {
-				return Err(format!("10^{}: Integer overflow", n.to_string()));
+				return Err(format!("10^{}: Integer overflow.", n.to_string()));
 			},
 		};
@@ -81,7 +79,7 @@ fn main() -> ExitCode {
 				f
 			},
 			Err(err) => {
-				eprintln!("{}: {}", argv[0], err);
+				eprintln!("{}: {}.", argv[0], err);
 				return ExitCode::from(EX_DATAERR as u8);
 			},
 		};
@@ -89,7 +87,7 @@ fn main() -> ExitCode {
 		let (number, prefix) = match convert(n) {
 			Ok(x) => x,
 			Err(err) => {
-				eprintln!("{}: {}", argv[0], err);
+				eprintln!("{}: {}.", argv[0], err);
 				return ExitCode::from(EX_SOFTWARE as u8);
 			},
 		};
@@ -100,7 +98,7 @@ fn main() -> ExitCode {
 		stdout().write_all(format!("{} {}\n", out, si_prefix).as_bytes())
 			.unwrap_or_else(|e| {
-				eprintln!("{}: {}", argv[0], e.strerror());
+				eprintln!("{}: {}.", argv[0], e);
 				exit(EX_IOERR);
 			});
 	}
--- a/src/rpn.rs
+++ b/src/rpn.rs
@@ -172,7 +172,7 @@ fn eval(
 					};
 				} else {
 					return Err(EvaluationError {
-						message: format!("{}: Unexpected operation", op),
+						message: format!("{}: Unexpected operation.", op),
 						code: EX_DATAERR,
 					})
 				}
--- a/src/strerror.rs
+++ b/src/strerror.rs
@@ -1,31 +0,0 @@
 /*
 * Copyright (c) 2024 Emma Tebibyte <emma@tebibyte.media>
 * SPDX-License-Identifier: FSFAP
 *
 * 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.
 */
 use std::ffi::{ c_int, c_char, CStr };
 pub trait StrError { fn strerror(&self) -> String; }
 impl StrError for std::io::Error {
 	/* wrapper function for use in Rust */
 	fn strerror(&self) -> String {
 		/* Get the raw OS error. If it’s None, what the hell is going on‽ */
 		let errno = self.raw_os_error().unwrap_or(0) as c_int;
 		/* Get a CStr from the error message so that it’s referenced and then
 		 * convert it to an owned value. If the string is not valid UTF-8,
 		 * return that error instead. */
 		match unsafe { CStr::from_ptr(strerror(errno)) }.to_str() {
 			Ok(s) => s.to_owned(), // yay!! :D
 			Err(e) => e.to_string(), // awww :(
 		}
 	}
 }
 /* binding to strerror(3p) */
 extern "C" { fn strerror(errnum: c_int) -> *mut c_char; }
--- a/src/test.rs
+++ b/src/test.rs
@@ -1,10 +0,0 @@
 extern crate strerror;
 use strerror::raw_message;
 fn main() {
 	stdout.write_all(b"meow\n").unwrap_or_else(|e| {
 		eprintln!("{}", raw_message(e));
 		std::process::exit(1);
 	});
 }
Author	SHA1	Message	Date
emma	432b19818e	made dj options no longer alphabetized	2024-04-28 20:42:44 -06:00
emma	187d9486b7	dj.1: debug output clarification	2024-04-18 08:44:44 -06:00
emma	b41af1b578	dj.1: -c: grammar	2024-04-18 08:41:55 -06:00
emma	ed284b9949	dj.1: -a: More specific wording	2024-04-18 08:40:29 -06:00
emma	3cdade71e2	dj.1: -S whether or not the input is a stream is irrelevant	2024-04-18 08:38:48 -06:00
emma	df16707b0e	intcmp.1: -e permits adjacent integers to be equal to each other	2024-04-18 08:36:01 -06:00
emma	13ee16173e	fop.1: initial commit	2024-03-29 16:47:00 -06:00
emma	5db09a5ca1	mm.1: cat(1p) and tee(1p) provide similar functionality	2024-03-29 16:30:06 -06:00
emma	ce5a4dc4bd	mm.1: removed STANDARD INPUT section	2024-03-29 16:29:27 -06:00
emma	abc599148d	mm.1: subsequent outputs are opened for appending	2024-03-29 16:26:41 -06:00
emma	63c8ff8093	intcmp.1: compares integers to each other	2024-03-29 16:22:56 -06:00
emma	9ea57a27b7	dj.1: stdin by default	2024-03-29 16:21:02 -06:00
emma	4e33f945ae	dj.1: null bytes	2024-03-29 16:17:48 -06:00
emma	70b0c2f924	dj.1: fixed -d description	2024-03-29 16:14:27 -06:00
emma	603d8ee1d8	str.1: remove extraneous former implementation information	2024-03-27 00:17:33 -06:00
emma	cdd8e79b01	str.1: strings are not tested against each other	2024-03-27 00:16:51 -06:00
emma	d3bfc7b1f5	npc.1: ASCII bytes	2024-03-27 00:16:15 -06:00
emma	3cb37d830a	mm.1: wording, consistency with dj.1	2024-03-27 00:14:34 -06:00
emma	6158a39a4a	dj.1: consistency with mm.1	2024-03-27 00:14:02 -06:00
emma	a2188dc674	dj.1: fix -H description	2024-03-27 00:09:17 -06:00
emma	49e2022e52	dj.1: -d, -i, -o, fixed descriptions	2024-03-27 00:08:43 -06:00
emma	bb43533a37	dj.1: -A and -a: fix descriptions	2024-03-26 23:58:00 -06:00
emma	f565f0530b	dj.1: dd(1p) is not a disk utility	2024-03-26 23:53:10 -06:00
emma	a1902df503	strcmp.1: Unicode is a proper noun	2024-03-26 23:50:16 -06:00
emma	63a0c683f9	docs: remove unnecessary references to the name of each program	2024-03-26 19:22:30 -06:00
emma	cf76fa94e6	mm.1: updated man page	2024-03-26 18:44:05 -06:00
emma	a6fd1108c6	docs: fixed formatting of many manpages	2024-03-26 18:26:51 -06:00