fix pipewire linked with everything + rename ilovecurses -> cursetree

stdout/stderr independence for child process

.gitignore

@@ -6,3 +6,6 @@ sandbox/
 .cache/
 compile_commands.json
 
+# valgrind
+vgcore.*
+

LICENSE

@@ -0,0 +1,674 @@
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+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU 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 <http://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
+<http://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
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.

LICENSES/GLIBC-COPYING

@@ -0,0 +1,339 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Lesser General Public License instead.)  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
+this service 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 make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  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.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                    GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
+refers to any such program or work, and a "work based on the Program"
+means either the Program or any derivative work under copyright law:
+that is to say, a work containing the Program or a portion of it,
+either verbatim or with modifications and/or translated into another
+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running the Program is not restricted, and the output from the Program
+is covered only if its contents constitute a work based on the
+Program (independent of having been made by running the Program).
+Whether that is true depends on what the Program does.
+
+  1. You may copy and distribute verbatim copies of the Program's
+source code as you receive it, in any medium, provided that you
+conspicuously and appropriately publish on each copy an appropriate
+copyright notice and disclaimer of warranty; keep intact all the
+notices that refer to this License and to the absence of any warranty;
+and give any other recipients of the Program a copy of this License
+along with the Program.
+
+You may charge a fee for the physical act of transferring a copy, and
+you may at your option offer warranty protection in exchange for a fee.
+
+  2. You may modify your copy or copies of the Program or any portion
+of it, thus forming a work based on the Program, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) You must cause the modified files to carry prominent notices
+    stating that you changed the files and the date of any change.
+
+    b) You must cause any work that you distribute or publish, that in
+    whole or in part contains or is derived from the Program or any
+    part thereof, to be licensed as a whole at no charge to all third
+    parties under the terms of this License.
+
+    c) If the modified program normally reads commands interactively
+    when run, you must cause it, when started running for such
+    interactive use in the most ordinary way, to print or display an
+    announcement including an appropriate copyright notice and a
+    notice that there is no warranty (or else, saying that you provide
+    a warranty) and that users may redistribute the program under
+    these conditions, and telling the user how to view a copy of this
+    License.  (Exception: if the Program itself is interactive but
+    does not normally print such an announcement, your work based on
+    the Program is not required to print an announcement.)
+
+These requirements apply to the modified work as a whole.  If
+identifiable sections of that work are not derived from the Program,
+and can be reasonably considered independent and separate works in
+themselves, then this License, and its terms, do not apply to those
+sections when you distribute them as separate works.  But when you
+distribute the same sections as part of a whole which is a work based
+on the Program, the distribution of the whole must be on the terms of
+this License, whose permissions for other licensees extend to the
+entire whole, and thus to each and every part regardless of who wrote it.
+
+Thus, it is not the intent of this section to claim rights or contest
+your rights to work written entirely by you; rather, the intent is to
+exercise the right to control the distribution of derivative or
+collective works based on the Program.
+
+In addition, mere aggregation of another work not based on the Program
+with the Program (or with a work based on the Program) on a volume of
+a storage or distribution medium does not bring the other work under
+the scope of this License.
+
+  3. You may copy and distribute the Program (or a work based on it,
+under Section 2) in object code or executable form under the terms of
+Sections 1 and 2 above provided that you also do one of the following:
+
+    a) Accompany it with the complete corresponding machine-readable
+    source code, which must be distributed under the terms of Sections
+    1 and 2 above on a medium customarily used for software interchange; or,
+
+    b) Accompany it with a written offer, valid for at least three
+    years, to give any third party, for a charge no more than your
+    cost of physically performing source distribution, a complete
+    machine-readable copy of the corresponding source code, to be
+    distributed under the terms of Sections 1 and 2 above on a medium
+    customarily used for software interchange; or,
+
+    c) Accompany it with the information you received as to the offer
+    to distribute corresponding source code.  (This alternative is
+    allowed only for noncommercial distribution and only if you
+    received the program in object code or executable form with such
+    an offer, in accord with Subsection b above.)
+
+The source code for a work means the preferred form of the work for
+making modifications to it.  For an executable work, complete source
+code means all the source code for all modules it contains, plus any
+associated interface definition files, plus the scripts used to
+control compilation and installation of the executable.  However, as a
+special exception, the source code distributed need not include
+anything that is normally distributed (in either source or binary
+form) with the major components (compiler, kernel, and so on) of the
+operating system on which the executable runs, unless that component
+itself accompanies the executable.
+
+If distribution of executable or object code is made by offering
+access to copy from a designated place, then offering equivalent
+access to copy the source code from the same place counts as
+distribution of the source code, even though third parties are not
+compelled to copy the source along with the object code.
+
+  4. You may not copy, modify, sublicense, or distribute the Program
+except as expressly provided under this License.  Any attempt
+otherwise to copy, modify, sublicense or distribute the Program is
+void, and will automatically terminate your rights under this License.
+However, parties who have received copies, or rights, from you under
+this License will not have their licenses terminated so long as such
+parties remain in full compliance.
+
+  5. You are not required to accept this License, since you have not
+signed it.  However, nothing else grants you permission to modify or
+distribute the Program or its derivative works.  These actions are
+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
+Program), you indicate your acceptance of this License to do so, and
+all its terms and conditions for copying, distributing or modifying
+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
+Program), the recipient automatically receives a license from the
+original licensor to copy, distribute or modify the Program subject to
+these terms and conditions.  You may not impose any further
+restrictions on the recipients' exercise of the rights granted herein.
+You are not responsible for enforcing compliance by third parties to
+this License.
+
+  7. If, as a consequence of a court judgment or allegation of patent
+infringement or for any other reason (not limited to patent issues),
+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
+distribute so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you
+may not distribute the Program at all.  For example, if a patent
+license would not permit royalty-free redistribution of the Program by
+all those who receive copies directly or indirectly through you, then
+the only way you could satisfy both it and this License would be to
+refrain entirely from distribution of the Program.
+
+If any portion of this section is held invalid or unenforceable under
+any particular circumstance, the balance of the section is intended to
+apply and the section as a whole is intended to apply in other
+circumstances.
+
+It is not the purpose of this section to induce you to infringe any
+patents or other property right claims or to contest validity of any
+such claims; this section has the sole purpose of protecting the
+integrity of the free software distribution system, which is
+implemented by public license practices.  Many people have made
+generous contributions to the wide range of software distributed
+through that system in reliance on consistent application of that
+system; it is up to the author/donor to decide if he or she is willing
+to distribute software through any other system and a licensee cannot
+impose that choice.
+
+This section is intended to make thoroughly clear what is believed to
+be a consequence of the rest of this License.
+
+  8. If the distribution and/or use of the Program is restricted in
+certain countries either by patents or by copyrighted interfaces, the
+original copyright holder who places the Program under this License
+may add an explicit geographical distribution limitation excluding
+those countries, so that distribution is permitted only in or among
+countries not thus excluded.  In such case, this License incorporates
+the limitation as if written in the body of this License.
+
+  9. The Free Software Foundation may publish revised and/or new versions
+of the 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 a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
+either of that version or of any later version published by the Free
+Software Foundation.  If the Program does not specify a version number of
+this License, you may choose any version ever published by the Free Software
+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
+programs whose distribution conditions are different, write to the author
+to ask for permission.  For software which is copyrighted by the Free
+Software Foundation, write to the Free Software Foundation; we sometimes
+make exceptions for this.  Our decision will be guided by the two goals
+of preserving the free status of all derivatives of our free software and
+of promoting the sharing and reuse of software generally.
+
+                            NO WARRANTY
+
+  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
+FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
+OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
+PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
+OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
+TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
+PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
+REPAIR OR CORRECTION.
+
+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
+REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
+INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
+OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
+TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
+YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
+PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGES.
+
+                     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
+convey 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 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with this program; if not, write to the Free Software Foundation, Inc.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision 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, the commands you use may
+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This 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.

LICENSES/GLIBC-COPYING.LIB

@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 2.1, February 1999
+
+ Copyright (C) 1991, 1999 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+[This is the first released version of the Lesser GPL.  It also counts
+ as the successor of the GNU Library Public License, version 2, hence
+ the version number 2.1.]
+
+                            Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+Licenses are intended to guarantee your freedom to share and change
+free software--to make sure the software is free for all its users.
+
+  This license, the Lesser General Public License, applies to some
+specially designated software packages--typically libraries--of the
+Free Software Foundation and other authors who decide to use it.  You
+can use it too, but we suggest you first think carefully about whether
+this license or the ordinary General Public License is the better
+strategy to use in any particular case, based on the explanations below.
+
+  When we speak of free software, we are referring to freedom of use,
+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 this service if you wish); that you receive source code or can get
+it if you want it; that you can change the software and use pieces of
+it in new free programs; and that you are informed that you can do
+these things.
+
+  To protect your rights, we need to make restrictions that forbid
+distributors to deny you these rights or to ask you to surrender these
+rights.  These restrictions translate to certain responsibilities for
+you if you distribute copies of the library or if you modify it.
+
+  For example, if you distribute copies of the library, whether gratis
+or for a fee, you must give the recipients all the rights that we gave
+you.  You must make sure that they, too, receive or can get the source
+code.  If you link other code with the library, you must provide
+complete object files to the recipients, so that they can relink them
+with the library after making changes to the library and recompiling
+it.  And you must show them these terms so they know their rights.
+
+  We protect your rights with a two-step method: (1) we copyright the
+library, and (2) we offer you this license, which gives you legal
+permission to copy, distribute and/or modify the library.
+
+  To protect each distributor, we want to make it very clear that
+there is no warranty for the free library.  Also, if the library is
+modified by someone else and passed on, the recipients should know
+that what they have is not the original version, so that the original
+author's reputation will not be affected by problems that might be
+introduced by others.
+
+  Finally, software patents pose a constant threat to the existence of
+any free program.  We wish to make sure that a company cannot
+effectively restrict the users of a free program by obtaining a
+restrictive license from a patent holder.  Therefore, we insist that
+any patent license obtained for a version of the library must be
+consistent with the full freedom of use specified in this license.
+
+  Most GNU software, including some libraries, is covered by the
+ordinary GNU General Public License.  This license, the GNU Lesser
+General Public License, applies to certain designated libraries, and
+is quite different from the ordinary General Public License.  We use
+this license for certain libraries in order to permit linking those
+libraries into non-free programs.
+
+  When a program is linked with a library, whether statically or using
+a shared library, the combination of the two is legally speaking a
+combined work, a derivative of the original library.  The ordinary
+General Public License therefore permits such linking only if the
+entire combination fits its criteria of freedom.  The Lesser General
+Public License permits more lax criteria for linking other code with
+the library.
+
+  We call this license the "Lesser" General Public License because it
+does Less to protect the user's freedom than the ordinary General
+Public License.  It also provides other free software developers Less
+of an advantage over competing non-free programs.  These disadvantages
+are the reason we use the ordinary General Public License for many
+libraries.  However, the Lesser license provides advantages in certain
+special circumstances.
+
+  For example, on rare occasions, there may be a special need to
+encourage the widest possible use of a certain library, so that it becomes
+a de-facto standard.  To achieve this, non-free programs must be
+allowed to use the library.  A more frequent case is that a free
+library does the same job as widely used non-free libraries.  In this
+case, there is little to gain by limiting the free library to free
+software only, so we use the Lesser General Public License.
+
+  In other cases, permission to use a particular library in non-free
+programs enables a greater number of people to use a large body of
+free software.  For example, permission to use the GNU C Library in
+non-free programs enables many more people to use the whole GNU
+operating system, as well as its variant, the GNU/Linux operating
+system.
+
+  Although the Lesser General Public License is Less protective of the
+users' freedom, it does ensure that the user of a program that is
+linked with the Library has the freedom and the wherewithal to run
+that program using a modified version of the Library.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.  Pay close attention to the difference between a
+"work based on the library" and a "work that uses the library".  The
+former contains code derived from the library, whereas the latter must
+be combined with the library in order to run.
+
+                  GNU LESSER GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License Agreement applies to any software library or other
+program which contains a notice placed by the copyright holder or
+other authorized party saying it may be distributed under the terms of
+this Lesser General Public License (also called "this License").
+Each licensee is addressed as "you".
+
+  A "library" means a collection of software functions and/or data
+prepared so as to be conveniently linked with application programs
+(which use some of those functions and data) to form executables.
+
+  The "Library", below, refers to any such software library or work
+which has been distributed under these terms.  A "work based on the
+Library" means either the Library or any derivative work under
+copyright law: that is to say, a work containing the Library or a
+portion of it, either verbatim or with modifications and/or translated
+straightforwardly into another language.  (Hereinafter, translation is
+included without limitation in the term "modification".)
+
+  "Source code" for a work means the preferred form of the work for
+making modifications to it.  For a library, complete source code means
+all the source code for all modules it contains, plus any associated
+interface definition files, plus the scripts used to control compilation
+and installation of the library.
+
+  Activities other than copying, distribution and modification are not
+covered by this License; they are outside its scope.  The act of
+running a program using the Library is not restricted, and output from
+such a program is covered only if its contents constitute a work based
+on the Library (independent of the use of the Library in a tool for
+writing it).  Whether that is true depends on what the Library does
+and what the program that uses the Library does.
+
+  1. You may copy and distribute verbatim copies of the Library's
+complete source code as you receive it, in any medium, provided that
+you conspicuously and appropriately publish on each copy an
+appropriate copyright notice and disclaimer of warranty; keep intact
+all the notices that refer to this License and to the absence of any
+warranty; and distribute a copy of this License along with the
+Library.
+
+  You may charge a fee for the physical act of transferring a copy,
+and you may at your option offer warranty protection in exchange for a
+fee.
+
+  2. You may modify your copy or copies of the Library or any portion
+of it, thus forming a work based on the Library, and copy and
+distribute such modifications or work under the terms of Section 1
+above, provided that you also meet all of these conditions:
+
+    a) The modified work must itself be a software library.
+
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+
+  13. The Free Software Foundation may publish revised and/or new
+versions of the 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
+specifies a version number of this License which applies to it and
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+WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
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+
+                     END OF TERMS AND CONDITIONS
+
+           How to Apply These Terms to Your New Libraries
+
+  If you develop a new library, and you want it to be of the greatest
+possible use to the public, we recommend making it free software that
+everyone can redistribute and change.  You can do so by permitting
+redistribution under these terms (or, alternatively, under the terms of the
+ordinary General Public License).
+
+  To apply these terms, attach the following notices to the library.  It is
+safest to attach them to the start of each source file to most effectively
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+"copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the library's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This library 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 2.1 of the License, or (at your option) any later version.
+
+    This library 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 library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+
+Also add information on how to contact you by electronic and paper mail.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the library, if
+necessary.  Here is a sample; alter the names:
+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the
+  library `Frob' (a library for tweaking knobs) written by James Random Hacker.
+
+  <signature of Ty Coon>, 1 April 1990
+  Ty Coon, President of Vice
+
+That's all there is to it!

LICENSES/README.md

@@ -0,0 +1,8 @@
+## LICENSES
+### Dorne
+Dorne is licensed under the GPLv3 copyleft license [`LICENSE`](../LICENSE).
+
+### Modifications
+Dorne makes use of modified functions from the GNU C Library which
+are licensed under [`LICENSES/GLIBC-COPYING`](GLIBC-COPYING),
+[`LICENSES/GLIBC-COPYING.LIB`](GLIBC-COPYING.LIB), and [`LICENSES/UC-LICENSE`](UC-LICENSE).

LICENSES/UC-LICENSE

@@ -0,0 +1,24 @@
+Copyright (c) 1990, 1993
+The Regents of the University of California.  All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. 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.
+4. Neither the name of the University nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.

Makefile

@@ -5,34 +5,49 @@ include config.mk
 # === BUILD ENVIRONMENT ===
 BIN := bin
 BUILD := build
-LIB := lib
 
-# Macro definitions
-define mkbin
-$(addprefix $(BIN)/,$1)
+LIB := lib
+CLI := cli
+
+# === MACRO DEFINITIONS ===
+define objpath
+$(addprefix $(BUILD)/,
+	$(addsuffix .o,
+		$(basename $(1))))
 endef
-define mkbuild
-$(addprefix $(BUILD)/,$1)
-endef
-define mklib
-$(addprefix $(LIB)/,$1)
+define mkobj
+$(foreach DEP, $?,
+	mkdir -p $(dir $(call objpath, $(DEP)))
+	$(CC) $(CFLAGS) -o $(call objpath, $(DEP)) -c $(DEP))
+
+$(LD) -r $(LDFLAGS) -o $@ $(call objpath, $?)
 endef
 
 # === BUILD TARGETS ===
-all: $(BUILD) $(BIN) $(call mkbin,pw-test graph sine)
-$(BIN)/pw-test: $(call mklib, main.c)
-	$(CCOMPILER) $(CFLAGS) -o $(BUILD)/pw-test.o -c $^
-	$(CLINKER) $(LDFLAGS) -o $@ $(BUILD)/pw-test.o
+all: $(BUILD) $(BIN) $(addprefix $(BIN)/,pw-test shfx dorne)
+$(BIN)/pw-test: $(addprefix $(LIB)/, main.c)
+	$(CC) $(CFLAGS) -o $(BUILD)/pw-test.o -c $^
+	$(CLD) $(CLDFLAGS) -lpipewire-0.3 -o $@ $(BUILD)/pw-test.o
+	
+$(BIN)/dorne: $(addprefix $(BUILD)/,dorne.o cursetree.o)
+	$(CLD) $(CLDFLAGS) -lncurses -o $@ $^
 	
 $(BUILD) $(BIN):
 	mkdir -p $@
 
+$(BUILD)/dorne.o: $(addprefix $(CLI)/, main.c)
+	$(mkobj)
+$(BUILD)/cursetree.o: $(addprefix $(CLI)/, tree.c curse.c)
+	$(mkobj)
+$(BUILD)/epty.o: $(addprefix $(CLI)/, child.c epty.c _pty.c)
+	$(mkobj)
+
 # === DEVELOPMENT TARGETS ===
 .PHONY: debug run test
 debug:
-	$(MAKE) all                         \
+	$(MAKE) all                          \
 		CFLAGS="$(CFLAGS) $(CFLAGS_DBG)"  \
-		LDFLAGS="$(LDFLAGS) $(LDFLAGS_DBG)"
+		CLDFLAGS="$(CLDFLAGS) $(CLDFLAGS_DBG)"
 run: debug
 	- command $(BIN)/pw-test
 test: clean run

TODO.md

@@ -0,0 +1,12 @@
+- [X] Use /dev/ptmx, to get ptmx (master) and pts (slave) file descriptors,
+then fork and exec shfx as child (+ close ptmx), then close pts as parent.
+>[!NOTE]
+> Use `termios(3)` to enable raw mode (implemented in `cursed.c`) (for the slave or master?)
+
+- [ ] Implement a SIGCHLD handler instead of using `waitpid` in `killchild()`, see 2nd example in `man wait(3p)`
+- [ ] Use threads to launch `killchild` to avoid blocking, then just join all the threads using atexit()
+
+- [ ] Should I compile ncurses with --with-pthread? (see `man 3x ncurses`)
+      What about --enable-widec? (are these just ligatures?)
+
+

cli/_pty.c

@@ -0,0 +1,177 @@
+/* WARNING: The mkpty(), forkmkpty(), & bindpty() functions are based on
+ * WARNING: the glibc openpty(), forkpty(), & login_tty() functions respectively.
+ * WARNING:
+ * WARNING: The GNU C Library's COPYING & COPYING.LIB licenses are available at
+ * WARNING: LICENSES/GLIBC-COPYING & LICENSES/GLIBC-COPYING.LIB in this repo.
+ * WARNING:
+ * WARNING: login_tty() maintains the original University of California license
+ * WARNING: available at LICENSES/UC-LICENSE in this repo.
+ */
+
+/* _XOPEN_SOURCE unlocks <stdlib.h> pty/ptmx/pts declarations. */
+#define _XOPEN_SOURCE 600
+/* _GNU_SOURCE unlocks the ptsname_r declaration*/
+#define _GNU_SOURCE
+#include <fcntl.h>
+#include <stdlib.h>
+#include <asm/termbits.h>  /* TIOC* constants */
+#include <sys/ioctl.h>
+
+#include "_pty.h"
+
+/* Allocate PTY master and slave file descriptors.
+ * errno will have been set if newpty() fails.
+ *
+ * NOTE: This function is my alternative to GLibC's
+ * NOTE: openpty() function. It exists as a learning resource.
+ * REF: https://sourceware.org/git/glibc.git -> ./login/openpty.c
+ */
+int mkpty(int *fdmx, int *fds) {
+  int _fdmx = -1, _fds = -1;
+  char sname[TTYNAME_MAX];  
+
+  // Configure PTY master (file descriptor)
+  _fdmx = posix_openpt(O_RDWR | O_NOCTTY);
+  if (_fdmx == -1)
+    return EXIT_FAILURE;
+
+  if (grantpt(_fdmx))
+    goto fail;
+  if (unlockpt(_fdmx))
+    goto fail;
+
+#ifdef TIOCGPTPEER
+  /* Try to allocate slave fd solely based on PTMX fd first. */
+  _fds = ioctl(_fdmx, TIOCGPTPEER, O_RDWR | O_NOCTTY);
+#endif
+  if (_fds == -1) {
+    /* Fallback to path-based slave fd allocation
+     * (if the kernel doesn't support TIOCGPTPEER, ie Linux <4.13) */
+    if(ptsname_r(_fdmx, sname, sizeof(sname)))
+      goto fail;
+
+    _fds = open(sname, O_RDWR | O_NOCTTY);
+    if (_fds == -1)
+      goto fail;
+  }
+
+  /* Propagate file descriptors via parameters */
+  *fdmx = _fdmx;
+  *fds = _fds;
+  return EXIT_SUCCESS;
+
+fail:
+  if (_fdmx == -1) {
+    close(_fdmx);
+    if (_fds == -1)
+      close(_fds);
+  }
+  return EXIT_FAILURE;
+}
+
+/* Set fdty as the controlling terminal for the calling process.
+ * Returns 0 on success, and 1 on failure.
+ * NOTE: This function is my alternative to GLibC's
+ * NOTE: login_tty() function. It exists as a learning resource.
+ * REF: https://sourceware.org/git/glibc.git -> ./login/login_tty.c
+ */
+static inline int setctty(const int fdty) {  
+  /* We assume any kernel compiling this defines TIOCSCTTY,
+   * otherwise this implementation won't exactly work... */
+  return (ioctl(fdty, TIOCSCTTY, 0) != -1);
+}
+
+/* Bind fdty (terminal fd) to stdin/stdout/stderr for the calling process. 
+ * This functions blocks until the EBUSY (see `man dup2`) race condition lifts.
+ * NOTE: This function is my alternative to GLibC's
+ * NOTE: login_tty() function. It exists as a learning resource.
+ * WARNING: This function maintains the original University of California
+ * WARNING: LICENSE (1990-1993) as per glibc.git:/login/login_tty.c
+ * WARNING: available at LICENSES/UC-LICENSE in this repo.
+ * REF: https://sourceware.org/git/glibc.git -> ./login/login_tty.c
+ */
+void bindpty(const int fdty) {
+  /* Adjust stdin/stdout/stderr to refer to fd*/
+  BIND(fdty, STDIN_FILENO);
+  BIND(fdty, STDOUT_FILENO);
+  BIND(fdty, STDERR_FILENO);
+  if (fdty > 2)
+    close(fdty);
+}
+
+/* Allocate a PTY and fork, giving ptmx (master) to the parent
+ * and binding the child's stdin/stdout/stderr to pts (slave).
+ * Return value is indentical to fork(2).
+ * NOTE: This function is my alternative to GLibC's
+ * NOTE: forkpty() function. It exists as a learning resource.
+ * REF: https://sourceware.org/git/glibc.git -> ./login/forkpty.c
+ */
+pid_t forkmkpty(int *fdmx) {
+  int _fdmx, fds;
+  pid_t pid;
+  if (mkpty(&_fdmx, &fds))
+    return EXIT_FAILURE;
+
+  switch (pid = fork()) {
+  case -1:
+    close(_fdmx);
+    close(fds);
+    return -1;    
+  case 0:
+    /* Child Process */
+    close(_fdmx);
+    setctty(fds);
+    bindpty(fds);
+    break;
+    
+  default:
+    /* Parent Process */
+    close(fds);
+    // propagate ptmx (master) fd
+    *fdmx = _fdmx;
+    break;
+  }
+
+  /* Both Processes */
+  return pid;
+}
+
+/* Set pseudoterminal slave's window size.
+ * Returns 0 on success, and fails with -1 if the kernel doesn't
+ * implement this, or 1 for general errors (errno will be set).
+ * NOTE: Typically this is part of a glibc openpty() call.
+ */
+int setptsxy(const unsigned short rows, const unsigned short cols, const int fds) {
+#ifndef TIOCSWINSZ
+  /* Fail if kernel doesn't support TIOCSWINSZ. */
+  return -1;
+#else
+  struct winsize win = {
+    .ws_row = rows,
+    .ws_col = cols,
+  };
+  
+  if (ioctl(fds, TIOCSWINSZ, &win) == -1)
+    return EXIT_FAILURE;
+  return EXIT_SUCCESS;
+#endif /* TIOCSWINSZ */
+}
+
+/* Get pseudoterminal slave's window size.
+ * Returns 0 on success, and fails with -1 if the kernel doesn't
+ * implement this, or 1 for general errors (errno will be set).
+ */
+int getptsxy(unsigned short *rows, unsigned short *cols, const int fds) {
+#ifndef TIOCGWINSZ
+  /* Fail if kernel doesn't support TIOCGWINSZ. */
+  return -1;
+#else
+  struct winsize win = (struct winsize){ 0 };
+  if (ioctl(fds, TIOCGWINSZ, &win) == -1)
+    return EXIT_FAILURE;
+  *rows = win.ws_row;
+  *cols = win.ws_col;
+  return EXIT_SUCCESS;
+#endif /* TIOCGWINSZ */
+}
+

cli/_pty.h

@@ -0,0 +1,30 @@
+#ifndef DORNE_MKPTY_H
+#define DORNE_MKPTY_H
+
+#include <errno.h>
+#include <limits.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#ifdef PATH_MAX
+#define TTYNAME_MAX PATH_MAX
+#else
+#define TTYNAME_MAX 512
+#endif /* PATH_MAX */
+
+#define BIND(fdsrc, fddst)                                                     \
+  while (dup2(fdsrc, fddst) == -1 && errno == EBUSY)                           \
+    ;
+
+/* Custom implementation of glibc::openpty() */
+int mkpty(int *fdmx, int *fds);
+/* Custom implementation of glibc::login_tty() */
+void bindpty(const int fdty);
+/* Custom implementation of glibc::forkpty() */
+pid_t forkmkpty(int *fdmx);
+
+int setptsxy(const unsigned short rows, const unsigned short cols,
+             const int fds);
+int getptsxy(unsigned short *rows, unsigned short *cols, const int fds);
+
+#endif /* DORNE_MKPTY_H */

cli/child.c

@@ -0,0 +1,63 @@
+#include <signal.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/wait.h>
+
+#include "child.h"
+#include "epty.h"
+
+/* SIGTERM grace period before a child is sent SIGKILL.
+ * Value is in microseconds (us), 1000us = 1ms */
+#define CHILD_GRACE_US 100000
+
+/* Check if a child is still alive by pid
+ * by kill(3p) sending a null signal (0).
+ */
+static int is_alive(struct d_child *child) {
+  return (kill(child->pid, 0) == 0);
+}
+
+/* Force a child to die, first by sending SIGTERM, otherwise SIGKILL.
+ * NOTE: killchild() ASSUMES the child is LIVING at the start.
+ * NOTE: Keep this in mind when threading!
+ */
+void killchild(struct d_child *child) {
+  int stat;
+
+  /* Request Death */
+  kill(child->pid, SIGTERM);
+  usleep(CHILD_GRACE_US);
+  
+  /* Force Death */
+  if (is_alive(child))  
+    kill(child->pid, SIGKILL);
+
+  /* Reap */
+  waitpid(child->pid, &stat, 0);
+}
+
+/* Fork to spawn a child process running bin/shfx in an "epty".
+ */
+int spawnchild(struct d_child *child) {
+  *child = (struct d_child){ 0 };
+  
+  /* fork(2) and allocate an "error-piped pseudoterminal" (epty) */
+  switch (child->pid = forkepty(&child->fdmx, &child->fderr)) {
+  case -1:
+    perror("forkepty");
+    return EXIT_FAILURE;
+  case 0:
+    char *args[] = {"shfx", NULL};
+    execvp("shfx", args);
+    perror("execvp");
+    exit(1);
+  default:
+    usleep(1000);
+    char bufout[10];
+    bufout[9] = '\0';
+    read(child->fdmx, bufout, 9);
+    printf("child stdout: \"%s\"\n", bufout);
+    break;
+  }
+  return EXIT_SUCCESS;
+}

cli/child.h

@@ -0,0 +1,14 @@
+#ifndef DORNE_CHILD_H
+#define DORNE_CHILD_H
+
+#include <unistd.h>
+
+struct d_child {
+  pid_t pid;
+  int fdmx; /* PTY master fd (read/write) */
+  int fderr; /* child's stderr (readonly) */
+} __attribute__((packed, aligned(4)));
+
+int spawnchild(struct d_child *child);
+
+#endif /* DORNE_CHILD_H */

cli/curse.c

@@ -0,0 +1,114 @@
+#include <locale.h>
+#include <unistd.h>
+
+#include "curse.h"
+
+#define BASE_DELAY 1000000
+#define CRS_LOCALE "en_US.UTF-8"
+
+/* Set ncurses terminal mode (buffering, character processing,
+ * Key->SIG handling, and other termios(3) functionality).
+ */
+int termmode(const enum crs_termmode mode) {
+  switch (mode) {
+  case TMODE_CBREAK:
+    return cbreak();
+  case TMODE_RAW:
+    return raw();
+  case TMODE_NOCBREAK:
+    return nocbreak();
+  case TMODE_NORAW:
+    return noraw();
+  default:
+    /* defaulting is not possible. */
+    return 1;
+  }
+}
+
+/* Apply a default IO configuration for an ncurses WINDOW.
+ */
+static inline void __conf_window(WINDOW *const win) {
+  nodelay(win, TRUE); // getch(3x) nonblocking IO
+  keypad(win, TRUE);  // allow function keys
+  // intrflush(3x) - flush terminal input buffer on interrupt key
+  intrflush(win, FALSE);
+}
+
+/* Initialise ncurses for our usecase.
+ * WARNING: This function should only be called once.
+ */
+void init_ncurses(void) {
+  // ncurses expects a locale for consistent behaviour
+  setlocale(LC_ALL, CRS_LOCALE);
+
+  /* NCurses Init */
+  initscr();
+  __conf_window(stdscr);
+  start_color();
+
+  /* Screen Configuration */
+  termmode(TMODE_CBREAK);
+  noecho(); // manually echo from getch(3x)
+
+  curs_set(0); // hide cursor
+}
+
+/* Initialise (with default IO configuration) a new ncurses WINDOW.
+ */
+WINDOW *new_window(const int x, const int y, const int width,
+                   const int height) {
+  WINDOW *win = newwin(height, width, y, x);
+  __conf_window(win);
+
+  return win;
+}
+
+/* Initialise (with default IO configuration) the root ncurses WINDOW.
+ * NOTE: This is typically done via initscr(3x) and called "stdscr".
+ */
+WINDOW *root_window(void) {
+  WINDOW *rootwin = new_window(0, 0, COLS, LINES);
+  __conf_window(rootwin);
+  return rootwin;
+}
+
+/* Resize and move (if resized successfully) an ncurses WINDOW.
+ * Returns ERR (1) on fail, and OK (0) on success.
+ * NOTE: Failure occurs if width or height <= 0,
+ * NOTE: or if the x,y coordinate is outside the screen bounds.
+ */
+int resizemv_window(const int x, const int y, const int width, const int height,
+                    WINDOW *const win) {
+  return wresize(win, height, width) || mvwin(win, y, x);
+}
+
+/*
+int main(const int argc, const char *const argv[]) {
+  init_ncurses();
+  WINDOW *stdscr = new_window(0, 0, 0, 0);
+
+  // Set background
+  wbkgd(stdscr, COLOR_PAIR(1));
+
+  attron(COLOR_PAIR(1));
+  attron(A_BOLD);
+  int counter = 0;
+  while (1) {
+    mvprintw(0, 0, "COUNTER %d", counter++);
+    refresh();
+
+    switch (getch()) {
+    case 'q':
+      goto end;
+    default:
+      break;
+    }
+
+    usleep(BASE_DELAY);
+  }
+
+end:
+  endwin();
+  return 0;
+}
+*/

cli/curse.h

@@ -0,0 +1,27 @@
+#ifndef DORNE_CURSE_H
+#define DORNE_CURSE_H
+
+/* libncurses with wide-character support. */
+#include <ncursesw/ncurses.h>
+
+enum crs_termmode {
+  /* tty cbreak mode */
+  TMODE_CBREAK,
+  /* tty raw mode */
+  TMODE_RAW,
+  /* tty cooked mode (ISIG & IXON not modified)*/
+  TMODE_NOCBREAK,
+  /* tty cooked mode (ISIG & IXON set) */
+  TMODE_NORAW,
+};
+
+int termmode(const enum crs_termmode mode);
+
+void init_ncurses(void);
+WINDOW *new_window(const int x, const int y, const int width, const int height);
+WINDOW *root_window(void);
+
+int resizemv_window(const int x, const int y, const int width, const int height,
+                    WINDOW *const win);
+
+#endif /* DORNE_CURSE_H */

cli/epty.c

@@ -0,0 +1,45 @@
+#include <stdlib.h>
+
+#include "_pty.h"
+
+#define PIPE_READ 0
+#define PIPE_WRITE 1
+
+/* Allocate a PTY and fork, giving fdmx (master) to the parent
+ * and binding the child's stdin/stdout to fds (slave).
+ * Return value is indentical to fork(2).
+ * NOTE: This function is my alternative to GLibC's
+ * NOTE: forkpty() function. It exists as a learning resource.
+ * REF: https://sourceware.org/git/glibc.git -> ./login/forkpty.c
+ */
+pid_t forkepty(int *fdmx, int *fderr) {
+  // master/slave, and stderr pipe fds
+  int epipe[2];
+  pid_t pid;
+
+  if (pipe(epipe) == -1)
+    return EXIT_FAILURE;
+  switch (pid = forkmkpty(fdmx)) {
+  case -1:
+    /* forkmkpty() will close fdmx/fds for us */
+    close(epipe[PIPE_READ]);
+    close(epipe[PIPE_WRITE]);
+    return -1;
+  case 0:
+    /* Child Process */
+    /* forkmkpty() will close fdmx for us */
+    close(epipe[PIPE_READ]);
+    BIND(epipe[PIPE_WRITE], STDERR_FILENO);
+    break;
+
+  default:
+    /* Parent Process */
+    /* forkmkpty() will close fds for us */
+    close(epipe[PIPE_WRITE]);
+    *fderr = epipe[PIPE_READ];
+    break;
+  }
+
+  /* Both Processes */
+  return pid;
+}

cli/epty.h

@@ -0,0 +1,8 @@
+#ifndef DORNE_EPTY_H
+#define DORNE_EPTY_H
+
+#include <sys/types.h>
+
+pid_t forkepty(int *fdmx, int *fderr);
+
+#endif /* DORNE_EPTY_H */

cli/main.c

@@ -0,0 +1,82 @@
+#include <fcntl.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <ncursesw/ncurses.h>
+
+// #include "child.h"
+#include "curse.h"
+#include "tree.h"
+
+// struct d_window {
+//   int ptmx; // fd
+// };
+
+// struct d_window new_window() {
+//   struct d_window w = {
+//     .ptmx = posix_openpt(O_RDWR | O_NOCTTY),
+//   };
+// }
+
+int main(int argc, char **argv) {
+  // struct d_child child;
+  // spawnchild(&child);
+
+  struct crs_tree *tree;
+  init_tree(&tree);
+
+  init_pair(1, COLOR_CYAN, COLOR_CYAN);
+  init_pair(2, COLOR_RED, COLOR_RED);
+  init_pair(3, COLOR_MAGENTA, COLOR_MAGENTA);
+  init_pair(4, COLOR_YELLOW, COLOR_YELLOW);
+  init_pair(5, COLOR_GREEN, COLOR_GREEN);
+
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  /* BUG TODO : PROGRAM SHITS ITSELF IF RATIO MAKES WIDTH/HEIGHT 0, MAYBE CLAMP? : TODO BUG*/
+  bifurcate_window_node(&tree->root, AXIS_X, FALSE, 0.5);
+  bifurcate_window_node(&tree->root->child[0], AXIS_X, FALSE, 0.05);
+  bifurcate_window_node(&tree->root->child[1], AXIS_Y, FALSE, 0.7);
+  bifurcate_window_node(&tree->root->child[1]->child[1], AXIS_X, FALSE, 0.9);
+
+  wbkgd(tree->root->child[0]->child[0]->win, COLOR_PAIR(5));
+  wbkgd(tree->root->child[0]->child[1]->win, COLOR_PAIR(3));
+  wbkgd(tree->root->child[1]->child[0]->win, COLOR_PAIR(2));
+  wbkgd(tree->root->child[1]->child[1]->child[0]->win, COLOR_PAIR(1));
+  wbkgd(tree->root->child[1]->child[1]->child[1]->win, COLOR_PAIR(4));
+  wrefresh(tree->root->child[0]->child[0]->win);
+  wrefresh(tree->root->child[0]->child[1]->win);
+  wrefresh(tree->root->child[1]->child[0]->win);
+  wrefresh(tree->root->child[1]->child[1]->child[0]->win);
+  wrefresh(tree->root->child[1]->child[1]->child[1]->win);
+
+  /* NOTE : THIS IS VALID : NOTE */
+  // refresh();
+  // WINDOW *my_win = newwin(0, 0, 0, 0);
+  // wbkgd(my_win, COLOR_PAIR(1));
+  // wrefresh(my_win);
+
+  /* NOTE : THIS IS VALID : NOTE */
+  // wbkgd(tree->root->win, COLOR_PAIR(2));
+  // wrefresh(tree->root->win);
+
+  while (1) {
+    // refresh();
+    usleep(100000);
+  }
+
+  destroy_tree(tree);
+  // endwin();
+  // free(tree);
+
+  return EXIT_SUCCESS;
+}

cli/tree.c

@@ -0,0 +1,245 @@
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "curse.h"
+#include "tree.h"
+
+/* Internal allocator method for crs_node structures.
+ */
+static inline struct crs_node *__alloc_node(const enum crs_nodetype type) {
+  struct crs_node *node = (struct crs_node *)malloc(sizeof(struct crs_node));
+  node->type = type;
+  return node;
+}
+
+/* Construct a new window node (crs_node of type NODE_WIN).
+ */
+static struct crs_node *init_window_node(WINDOW *const win) {
+  struct crs_node *node = __alloc_node(NODE_WINDOW);
+  node->win = win;
+
+  return node;
+}
+
+static struct crs_node *auto_window_node(const struct crs_nodedims *dims) {
+  WINDOW *win = newwin(dims->height, dims->width, dims->y, dims->x);
+  return init_window_node(win);
+}
+
+static struct crs_node *init_abstract_node(struct crs_node *node0,
+                                           struct crs_node *node1,
+                                           const enum crs_axis axis,
+                                           const float ratio,
+                                           struct crs_nodedims *dims) {
+  struct crs_node *node = __alloc_node(NODE_ABSTRACT);
+  node->axis = axis;
+  node->ratio = ratio;
+  node->dims = dims;
+
+  node->child[0] = node0;
+  node->child[1] = node1;
+  return node;
+}
+
+static void destroy_node(struct crs_node *node) {
+  if (node->type == NODE_WINDOW) {
+    /* Window Node */
+    delwin(node->win);
+    goto end;
+  }
+  /* Abstract Node */
+  assert(node->type == NODE_ABSTRACT);
+  destroy_node(node->child[0]);
+  destroy_node(node->child[1]);
+  free(node->dims);
+
+end:
+  free(node);
+}
+
+static inline struct crs_nodedims *__dup_dims(const struct crs_nodedims *dims) {
+  struct crs_nodedims *dup;
+  dup = (struct crs_nodedims *)malloc(sizeof(struct crs_nodedims));
+  memcpy(dup, dims, sizeof(struct crs_nodedims));
+
+  return dup;
+}
+
+static struct crs_nodedims *get_dims(const struct crs_node *node) {
+  struct crs_nodedims *dims;
+  if (node->type == NODE_WINDOW) {
+    /* Window Node */
+    dims = (struct crs_nodedims *)malloc(sizeof(struct crs_nodedims));
+    // GET_WNODEDIMS();
+    getbegyx(node->win, dims->y, dims->x);
+    getmaxyx(node->win, dims->height, dims->width);
+    printf("getx: %d\n", dims->x);
+    printf("gety: %d\n", dims->y);
+    printf("getwidth: %d\n", dims->width);
+    printf("getheight: %d\n", dims->height);
+  } else {
+    /* Abstract Node */
+    assert(node->type == NODE_ABSTRACT);
+    dims = __dup_dims(node->dims);
+  }
+
+  return dims;
+}
+
+struct crs_nodedims term_dims(void) {
+  struct crs_nodedims dims;
+  getbegyx(stdscr, dims.y, dims.x);
+  getmaxyx(stdscr, dims.height, dims.width);
+  return dims;
+}
+
+/* Calculate the dimensions for nodes resulting from a bifurcation.
+ * Returns 0 on success, and 1 on failure if any width/height are 0 characters.
+ * WARNING: This function does not guarantee the x,y positions returned
+ * WARNING: are valid screen coordinates.
+ */
+static int bifurcate_dims(const struct crs_node *parent,
+                          const enum crs_axis axis, const float ratio,
+                          struct crs_nodedims **dims0,
+                          struct crs_nodedims **dims1) {
+  assert(0 < ratio && ratio < 1);
+  struct crs_nodedims *_dims0, *_dims1;
+
+  _dims0 = get_dims(parent);
+  _dims1 = __dup_dims(_dims0);
+
+  printf("widthP: %d\n", _dims0->width);
+  printf("heightP: %d\n", _dims0->height);
+
+  if (axis == AXIS_X) {
+    _dims0->width *= ratio;
+    _dims1->width -= _dims0->width;
+    _dims1->x += _dims0->width;
+  } else {
+    _dims0->height *= ratio;
+    _dims1->height -= _dims0->height;
+    _dims1->y += _dims0->height;
+  }
+
+  if (!_dims0->width || !_dims0->height || !_dims1->width || !_dims1->height) {
+    printf("width0: %d\n", _dims0->width);
+    printf("height0: %d\n", _dims0->height);
+    printf("width1: %d\n", _dims1->width);
+    printf("height1: %d\n", _dims1->height);
+    return 1;
+  }
+
+  // propagate bifurcated dimensions
+  *dims0 = _dims0;
+  *dims1 = _dims1;
+  return 0;
+}
+
+static void resize_node(struct crs_node *node, struct crs_nodedims *new_dims) {
+  if (node->type == NODE_WINDOW) {
+    /* Window Node */
+    resizemv_window(new_dims->x, new_dims->y, new_dims->width, new_dims->height,
+                    node->win);
+    free(new_dims);
+  } else {
+    /* Abstract Node */
+    assert(node->type == NODE_ABSTRACT);
+    struct crs_nodedims *dims0, *dims1;
+
+    free(node->dims);
+    node->dims = new_dims;
+    bifurcate_dims(node, node->axis, node->ratio, &dims0, &dims1);
+
+    resize_node(node->child[0], dims0);
+    resize_node(node->child[1], dims1);
+  }
+}
+
+/* Subdivide a window node's allocated region into two window nodes
+ * replacing the original node with an abstract node.
+ * Parameters:
+ *   axis   - controls which direction the subdivision occurs
+ *   invert_axis - invert index of the original node in the new abstract node
+ */
+void bifurcate_window_node(struct crs_node **node, const enum crs_axis axis,
+                           const int invert_axis, const float ratio) {
+  assert((*node)->type == NODE_WINDOW);
+  struct crs_nodedims *dims0, *dims1;
+  struct crs_node *node0, *node1;
+
+  if (bifurcate_dims(*node, axis, ratio, &dims0, &dims1)) {
+    printf("FAILED TERRIBLY THE FUCK\n");
+    exit(1);
+    return;
+  }
+  if (invert_axis) {
+    /* Inverted Bifurcation */
+    node0 = auto_window_node(dims0);
+    node1 = *node;
+    resize_node(node1, dims1);
+  } else {
+    /* Non-Inverted Bifurcation */
+    node0 = *node;
+    node1 = auto_window_node(dims1);
+    resize_node(node0, dims0);
+  }
+
+  *node = init_abstract_node(node0, node1, axis, ratio, (*node)->dims);
+}
+
+/* Collapse an abstract node, killing one child node and resizing
+ * the other to take its place.
+ */
+static void collapse_abstract_node(struct crs_node **node,
+                                   const int collapse_i) {
+  assert((*node)->type == NODE_ABSTRACT);
+  assert(0 <= collapse_i && collapse_i < NODE_CHILD_N);
+
+  // WARNING: only works for NODE_CHILD_N=2 (binary trees)
+  destroy_node((*node)->child[!collapse_i]);
+
+  struct crs_node *collapse_target = (*node)->child[collapse_i];
+  free(*node);
+  *node = collapse_target;
+}
+
+/*
+ */
+static struct crs_node *init_root_node(void) {
+  struct crs_nodedims rootdims;
+  WINDOW *rootwin;
+
+  // rootdims = term_dims();
+  // rootwin = new_window(rootdims.x, rootdims.y,
+  //                      rootdims.height, rootdims.height);
+  // rootwin = new_window(0, 0, 0, 0);
+  rootwin = root_window();
+  return init_window_node(rootwin);
+}
+
+int init_tree(struct crs_tree **const tree) {
+  *tree = (struct crs_tree *)malloc(sizeof(struct crs_tree));
+
+  /* Initialise NCurses Library & Standard Screen */
+  init_ncurses();
+
+  (*tree)->root = init_root_node();
+
+  // (*tree)->root = __alloc_node(NODE_WINDOW);
+  // crs_init(&(*tree)->root->win);
+
+  return EXIT_SUCCESS;
+}
+
+void destroy_tree(struct crs_tree *const tree) {
+  /* WARNING: is it ok to delwin(stdscr) ?? */
+  destroy_node(tree->root);
+
+  endwin();
+  free(tree);
+}
+
+void resize_tree(struct crs_tree *const tree, struct crs_nodedims *const dims) {
+  resize_node(tree->root, dims);
+}

cli/tree.h

@@ -0,0 +1,61 @@
+#ifndef DORNE_TREE_H
+#define DORNE_TREE_H
+
+#ifndef __NCURSES_H
+typedef struct _win_st WINDOW;
+#endif /* __NCURSES_H */
+
+#define NODE_CHILD_N 2
+
+/* MACRO:
+ * Get widnow node start x,y coordinates, width, & height.
+ * void NODEDIMS(struct crs_node *node, struct crs_nodedims dims);
+ */
+#define GET_WNODEDIMS(dims, node)                                              \
+  (getbegyx((node)->win, dims.y, dims.x));                                     \
+  getmaxyx((node)->win, dims.y, dims.x)
+
+enum crs_nodetype {
+  NODE_WINDOW,
+  NODE_ABSTRACT,
+};
+
+/* Stores a node's starting x,y coordinates, width, & height.
+ * NOTE: Intended for interfunction communication.
+ */
+struct crs_nodedims {
+  int x, y, width, height;
+};
+
+enum crs_axis {
+  AXIS_X,
+  AXIS_Y,
+};
+
+struct crs_node {
+  enum crs_nodetype type;
+  // union value depends on crs_node.type
+  union {
+    WINDOW *win;
+    struct {
+      enum crs_axis axis;
+      float ratio;
+      struct crs_nodedims *dims;
+      struct crs_node *child[NODE_CHILD_N];
+    };
+  };
+};
+
+struct crs_tree {
+  struct crs_node *root;
+};
+
+/* === External Interface === */
+int init_tree(struct crs_tree **const tree);
+void destroy_tree(struct crs_tree *const tree);
+void resize_tree(struct crs_tree *const tree, struct crs_nodedims *const dims);
+
+void bifurcate_window_node(struct crs_node **node, const enum crs_axis axis,
+                           const int invert_axis, const float ratio);
+
+#endif /* DORNE_TREE_H */

config.mk

@@ -1,13 +1,13 @@
 # === C Compiler Configuration ===
 CC := gcc
-# CCOMPILER = $$([ -x "$$(command -v bear)" ] && echo 'bear -- ') $(CC)
-CCOMPILER = $(CC)
 CFLAGS := -Wall -Wextra -std=gnu23 -O
 CFLAGS_DBG := -g
 
 # === C Linker Configuration ===
-CLINKER = $(CC)
-LDFLAGS := -lpipewire-0.3 -lm -lc
+LD := ld
+CLD = $(CC)
+LDFLAGS :=
+CLDFLAGS := -lm -lc
 LDFLAGS_DBG := -g
 
 # # === Nix Mutations ===

lib/cursed.c

@@ -0,0 +1,94 @@
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+
+#include "cursed.h"
+#include "termios.h"
+
+struct s_state *glstate;
+
+PRIVATE inline int termenable(struct s_state *st) {
+  struct termios term;
+
+  // if (!st)
+  //   return 1;
+
+  if (ioctl(0, TCGETS, &term) == -1)
+    return 1;
+  memcpy(&st->term, &term, sizeof(struct termios));
+  // control characters
+  // term.c_cc[VMIN] = 1;
+  // term.c_cc[VTIME] = 0;
+  // io flags
+  term.c_iflag &= ~(IXON | INPCK | ICRNL | ISTRIP | BRKINT);
+  term.c_oflag &= ~(OPOST); // disable post-processing (using \r\n manually now)
+  term.c_cflag |= (CS8);
+  // misc flags
+  term.c_lflag &= ~(ECHO | ICANON | IEXTEN);
+  if (ioctl(0, TCSETS, &term))
+    return 1;
+
+  // unbuffer stdin
+  // if (setvbuf(stdin, NULL, _IOLBF, 0))
+  //   return 1;
+
+  return 0;
+}
+
+PRIVATE inline int termdisable(struct s_state *st) {
+  if (!st)
+    return 1;
+
+  if (ioctl(0, TCSETS, &st->term))
+    return 1;
+  
+  return 0;
+}
+
+PRIVATE struct s_framebuffer *init_framebuffer(pos cols, pos rows) {
+  unsigned long int fbsz, bmsz; // framebuf + bitmap sizes
+  struct s_framebuffer *buf;
+}
+
+PRIVATE struct s_state *init_state(void) {
+  struct s_state *st = (struct s_state*)malloc(sizeof(struct s_state));
+  if (st == NULL) exit(1); // BUG: WARNING: TODO
+  return st;
+}
+
+PUBLIC _INIT void initlib(void) {
+  // atexit(destroylib)
+  glstate = init_state();
+  termenable(glstate);
+  // (volatile void)init_window(glstate, 90, 25);
+}
+
+PUBLIC _FINI void destroylib(void) {
+  // if (glstate != NULL) 
+  termdisable(glstate);
+}
+
+
+
+int main(int argc, char **argv) {
+  // TODO: use STDIN_FILENO instead for 0
+  char c, s[10];
+  int pad;
+  while (read(STDIN_FILENO, &c, 1) == 1) {
+    sprintf(s, "%d", c);
+    pad = 3 - strlen(s); // max is 256 (strlen 3)
+    
+    printf("0x%.02hhx %s", c, s);
+    if (!iscntrl(c)) {
+      for (int i=0; i < pad; i++)
+        putchar(' ');
+      printf(" (%c)", c);
+    }
+    printf("\r\n");
+  }
+
+  return EXIT_SUCCESS;
+}

lib/cursed.h

@@ -0,0 +1,41 @@
+#ifndef CURSED_H
+#define CURSED_H
+
+#include <stdbool.h>
+#include <sys/termios.h>
+
+#define PACKED __attribute__((packed, aligned(1)))
+#define PUBLIC __attribute((visibility("default")))
+#define PROTECTED __attribute__((visibility("hidden")))
+#define PRIVATE static
+
+#define _INIT __attribute__((constructor))
+#define _FINI __attribute__((destructor))
+
+typedef unsigned char uid;      // >=  8B
+typedef unsigned short int pos; // >= 16B
+
+struct s_framebuffer {
+  pos *buf; // framebuffer
+  bool bitmap[];
+} PACKED;
+
+struct s_window {
+  uid id;
+  pos cols;
+  pos rows;
+  struct s_framebuffer frame;
+
+  pos x;
+  pos y;
+} PACKED;
+
+struct s_state {
+  struct termios term;
+} PACKED;
+
+// === Public API ===
+PRIVATE struct s_framebuffer *init_framebuffer(pos cols, pos rows);
+PUBLIC struct s_window *init_window(uid id, pos cols, pos rows);
+
+#endif /* CURSED_H */

lib/graph.c

@@ -0,0 +1,54 @@
+#include <ncurses.h>
+
+// void init_colors() {
+//   start_color();
+//   init_pair(1, COLOR_GREEN, COLOR_BLACK);
+//   init_pair(2, COLOR_CYAN, COLOR_BLACK);
+//   init_pair(3, COLOR_MAGENTA, COLOR_BLACK);
+//   init_pair(4, COLOR_YELLOW, COLOR_BLACK);
+// }
+
+// int main(void) {
+//   initscr();
+//   printw("Goodbye World...");
+//   refresh();
+//   getch();
+//   endwin();
+
+//   return 0;
+// }
+
+int main(void) {
+  initscr();
+  raw();
+  // cbreak();
+  // noecho();
+  // echo();
+  // curs_set(0);
+  keypad(stdscr, TRUE); // enable F1, F2, etc
+  noecho();
+  // nodelay(stdscr, TRUE);
+
+  // getmaxyx(stdscr, max_y, max_x);
+  // init_colors();
+  printw("Type: ");
+  refresh();
+
+  int ch;
+  while (1) {
+    ch = getch();
+    if (ch == KEY_F(1)) {
+      printw("[!] F1\n");
+      break;
+    }
+    
+    attron(A_BOLD);
+    printw("%c", ch);
+    attroff(A_BOLD);
+    refresh();
+    // napms(50);
+  }
+
+  endwin();
+  return 0;
+}

lib/graph.h

@@ -0,0 +1,6 @@
+#ifndef DORNE_GRAPH_H
+#define DORNE_GRAPH_H
+
+
+
+#endif /* DORNE_GRAPH_H */

lib/main.c

@@ -1,15 +1,16 @@
 #include <math.h>
 
 #include <spa/param/audio/format-utils.h>
-
 #include <pipewire/pipewire.h>
 
 #define M_PI_M2 (M_PI + M_PI)
 
 #define DEFAULT_RATE 44100
+#define DEFAULT_PERIOD 1.0 / DEFAULT_RATE
+
 #define DEFAULT_CHANNELS 2
 #define DEFAULT_VOLUME 0.7
-#define DEFAULT_FREQ 200
+#define DEFAULT_FREQ 500
 
 #define DEFAULT_ACCUMULATOR -1
 
@@ -18,17 +19,72 @@
 struct data {
   struct pw_main_loop *loop;
   struct pw_stream *stream;
-  double accumulator;
-  uint32_t cycle;
+
+  /*
+   */
+  double t, tcyc; // global time and cycle time 
+  uint32_t frame, cycle;
 };
 
+#define NEW_DATA (struct data) \
+                 {             \
+                   .t = 0,     \
+                   .tcyc = 0,  \
+                   .frame = 0, \
+                   .cycle = 0, \
+                 }
+
+typedef int16_t (*snd)(struct data*);
+
+inline void data_progress(struct data *state) {
+  state->t += DEFAULT_PERIOD / DEFAULT_FREQ;
+  state->tcyc += DEFAULT_PERIOD / DEFAULT_FREQ;
+  if (++state->frame == DEFAULT_FREQ) {
+    state->tcyc -= DEFAULT_PERIOD;
+    state->frame = 0;
+    state->cycle++;
+  } 
+}
+
+int16_t snd_sine(struct data *state) {
+  int16_t val;
+  
+  /* sin() gives a value between -1.0 and 1.0, we first apply
+   * the volume and then scale with 32767.0 to get a 16 bits value
+   * between [-32767 32767].
+   * Another common method to convert a double to
+   * 16 bits is to multiple by 32768.0 and then clamp to
+   * [-32768 32767] to get the full 16 bits range. */
+  val = sin(state->tcyc * M_PI_M2 * DEFAULT_FREQ) * 32767.0 * DEFAULT_VOLUME;
+  
+  return val;
+}
+
+int graph_snd(snd f, struct data *state, double t_max, FILE *fstream) {
+  int16_t val;
+  if (fstream == NULL)
+    return 1;
+  
+  fputs("x, sin(x)\n", fstream);
+  while (state->t < t_max) {
+    val = f(state);
+    fprintf(fstream, "%f, %d\n", state->t, val);
+    data_progress(state);
+  }
+
+  fclose(fstream);
+  return 0;
+}
+
+
 /* [on_process] */
 static void on_process(void *userdata) {
   struct data *data = userdata;
   struct pw_buffer *b;
   struct spa_buffer *buf;
-  int i, c, n_frames, stride;
+  int n_frames, stride;
   int16_t *dst, val;
+  int i, c;
 
   if ((b = pw_stream_dequeue_buffer(data->stream)) == NULL) {
     pw_log_warn("out of buffers: %m");
@@ -45,19 +101,7 @@ static void on_process(void *userdata) {
     n_frames = SPA_MIN(b->requested, n_frames);
 
   for (i = 0; i < n_frames; i++) {
-    // data->accumulator += M_PI_M2 * DEFAULT_FREQ / DEFAULT_RATE; // * 440
-    if (data->accumulator++ == DEFAULT_RATE) {
-      data->accumulator = DEFAULT_ACCUMULATOR;
-      data->cycle++;
-    }
-
-    /* sin() gives a value between -1.0 and 1.0, we first apply
-     * the volume and then scale with 32767.0 to get a 16 bits value
-     * between [-32767 32767].
-     * Another common method to convert a double to
-     * 16 bits is to multiple by 32768.0 and then clamp to
-     * [-32768 32767] to get the full 16 bits range. */
-    val = sin(data->accumulator * M_PI_M2 * DEFAULT_FREQ / DEFAULT_RATE) * DEFAULT_VOLUME * 32767.0;
+    val = snd_sine(data);
     for (c = 0; c < DEFAULT_CHANNELS; c++)
       *dst++ = val;
   }
@@ -75,16 +119,20 @@ static const struct pw_stream_events stream_events = {
     .process = on_process,
 };
 
-int main(int argc, char *argv[]) {
-  struct data data = {
-      .accumulator = DEFAULT_ACCUMULATOR,
-      .cycle = 0,
-  };
+int main(int argc, char **argv) {
+  struct data data = NEW_DATA;
   const struct spa_pod *params[1];
   uint8_t buffer[1024];
   struct spa_pod_builder b = SPA_POD_BUILDER_INIT(buffer, sizeof(buffer));
 
-  pw_init(&argc, &argv);
+  // DEBUG: check sine wave is actually a sine wave
+  FILE *fstream = fopen("sine.txt", "w");
+  graph_snd(&snd_sine, &NEW_DATA, DEFAULT_PERIOD, fstream);
+  exit(69);
+  
+  int pw_argc = 0;
+  char **pw_argv = NULL;
+  pw_init(&pw_argc, &pw_argv); // pw_init(&argc, &argv);
 
   data.loop = pw_main_loop_new(NULL);
 

lib/sine.c

@@ -0,0 +1,125 @@
+#include <math.h>
+#include <ncurses.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define DEFAULT_AMPLITUDE 1
+#define DEFAULT_PERIOD .35
+#define DEFAULT_DELAY_MULTIPLIER 150
+#define BASE_DELAY 100
+
+// Color count
+#define NUM_COLORS 6
+
+typedef unsigned short ushort;
+
+ushort printwave(double amplitude, double period, short phase_shift,
+                 ushort color_index) {
+
+  double x;
+  for (x = 0.0; x < (COLS + phase_shift); x += 1.0) {
+
+    // Swap color
+    color_index += 1;
+    attron(COLOR_PAIR((color_index % NUM_COLORS) + 1));
+
+    // Find Y
+    double ratio = (2.0 * M_PI) / LINES;
+    double y = sin(period * x * ratio);
+    y *= amplitude;
+    y += LINES / 2;
+
+    // Print cell
+    mvprintw((int)(y), (int)(x - phase_shift), " ");
+  }
+
+  return color_index;
+}
+
+int main(int argc, char *argv[]) {
+  // Curses init
+  WINDOW *screen = initscr();
+  start_color();
+  nodelay(screen, 1);
+  cbreak();
+  noecho();
+  curs_set(0);
+  keypad(screen, TRUE);
+
+  // Color pairs
+  init_pair(1, COLOR_RED, COLOR_BLACK);
+  init_pair(2, COLOR_GREEN, COLOR_BLACK);
+  init_pair(3, COLOR_YELLOW, COLOR_BLACK);
+  init_pair(4, COLOR_BLUE, COLOR_BLACK);
+  init_pair(5, COLOR_MAGENTA, COLOR_BLACK);
+  init_pair(6, COLOR_CYAN, COLOR_BLACK);
+  init_pair(7, COLOR_WHITE, COLOR_BLACK);
+  attron(A_BOLD);
+  attron(A_STANDOUT);
+
+  // Wave attributes
+  unsigned char delayx = DEFAULT_DELAY_MULTIPLIER;
+  ushort color_index = 0;
+  short phase_shift = 0;
+  double amplitude = (LINES / 2) * DEFAULT_AMPLITUDE;
+  double period = DEFAULT_PERIOD;
+
+  while (1) {
+
+    erase();
+
+    color_index = printwave(amplitude, period, phase_shift, color_index);
+
+    attron(COLOR_PAIR(7));
+    mvprintw(0, 0, "PERIOD %.2f", period);
+    mvprintw(1, 0, "AMP: %.2f", amplitude);
+    mvprintw(2, 0, "PHASE: %d", phase_shift);
+    mvprintw(3, 0, "DELAY: x%hu", delayx);
+
+    refresh();
+
+    switch (getch()) {
+    case KEY_UP:
+    case 'k':
+      amplitude += 1.0;
+      break;
+    case KEY_DOWN:
+    case 'j':
+      amplitude -= 1.0;
+      break;
+    case KEY_LEFT:
+    case 'h':
+      period -= .05;
+      break;
+    case KEY_RIGHT:
+    case 'l':
+      period += .05;
+      break;
+    case ' ':
+      phase_shift = 0.0;
+      break;
+    case '+':
+      delayx += 1;
+      break;
+    case '-':
+      delayx -= 1;
+      break;
+    case 'q':
+      endwin();
+      return 0;
+    default:
+      break;
+    }
+
+    usleep(BASE_DELAY * delayx);
+
+    phase_shift += 1;
+
+    if (phase_shift * period >= LINES)
+      phase_shift = 0;
+  }
+
+  endwin();
+  return 0;
+}

scripts/test

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-USAGE='test [[run]-[valgrind]] ...'
+USAGE='test program [[run]-[valgrind]] ...'
 if [[ "$1" =~ help ]]; then
   echo "$USAGE"
   exit 0
@@ -10,17 +10,27 @@ MODE=
 REBUILD=true
 VALGRIND=false
 TARGET=all
-if [[ "$1" =~ run.* ]]; then
-  MODE="$1"
+PROGRAM="$1"
+MODE_ARG="$2"
+
+if [[ ! -x "$PROGRAM" ]]; then
+  echo "[!] Invalid program: \"$PROGRAM\""
+  echo "$USAGE"
+  exit 1
+fi
+
+if [[ "$MODE_ARG" =~ run.* ]]; then
+  MODE="$MODE_ARG"
   REBUILD=false
 fi
-if [[ "$1" =~ .*valgrind ]]; then
-  MODE="$1"
+if [[ "$MODE_ARG" =~ .*valgrind ]]; then
+  MODE="$MODE_ARG"
   VALGRIND=true
   PROXY='valgrind -s --leak-check=full --show-leak-kinds=all'
   TARGET=debug
 fi
 
+
 if [[ -n "$MODE" ]]; then
   shift
 fi
@@ -29,4 +39,4 @@ fi
 if [[ "$REBUILD" == true ]]; then
   make clean $TARGET
 fi
-LD_LIBRARY_PATH=./lib $PROXY ./cursed $@
+LD_LIBRARY_PATH=./lib $PROXY "$PROGRAM" $@