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important IOCCC rules updates, checkpoint on guidelines

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@@ -461,7 +461,7 @@ writing by <a href="../contact.html">contacting the judges</a>.</p>
</div>
</div>
<p class="leftbar">
These <a href="rules.html">IOCCC rules</a> are version <strong>28.28 2025-03-03</strong>.
These <a href="rules.html">IOCCC rules</a> are version <strong>28.29 2025-03-03</strong>.
</p>
<p class="leftbar">
The markdown form of these rules <a href="rules.md" download="rules.md">is
@@ -560,7 +560,48 @@ as well as
<div id="rules">
<h1 id="ioccc-rules">IOCCC RULES</h1>
</div>
<p>To help us with the volume of submissions, we ask that you follow these rules:</p>
<p>To help us with the volume of submissions, we ask that you follow the rules below.</p>
<div id="rule_abuse">
<h4 id="a-warning-about-rule-abuse">A warning about rule abuse</h4>
</div>
<p class="leftbar">
<strong>WARNING:</strong> Abusing these rules comes with a <strong>fair amount of risk</strong>
that your submission will be rejected. If you do plan to abuse the
rules, then you <strong>MUST CLEARLY EXPLAIN THE RATIONALE</strong> in your <code>remarks.md</code> file,
as to why you think your rule abuse should be allowed, and as to why you think
your submission should not be rejected for a rule violation.
<strong>Nevertheless, <em>Even if you do</em> explain this in your <code>remarks.md</code> file
you submission may still be rejected</strong>.
</p>
<p class="leftbar">
If you use the most recently released official IOCCC submission packaging
tool (hereby referred to as <code>mkiocccentry(1)</code>), which we <strong>STRONGLY
recommend you do</strong>, then the <code>mkiocccentry(1)</code> tool will warn you
if there appears to be a rule violation. The <code>mkiocccentry(1)</code> tool
also runs the <code>fnamchk(1)</code>, <code>txzchk(1)</code> and <code>chkentry(1)</code> tools.
Overriding problems detected by any of these tools comes with a
<strong>fair amount of risk</strong> that your submission will be rejected.
</p>
<p class="leftbar">
If you do override a rule violation warning from the <code>mkiocccentry(1)</code>
or related IOCCC tool, or otherwise plan to abuse the rules, then you <strong>MUST CLEARLY
EXPLAIN THE RATIONALE</strong> of why you are attempting to abuse the rules in your
<code>remarks.md</code> file. <strong><em>Even if you do</em> explain this in your <code>remarks.md</code> file
your submission may still be rejected</strong>.
</p>
<p class="leftbar">
<strong>HINT:</strong> If you do submit such a rule abusing / rule violating
submission, then consider also submitting an alternate version in a
different submission server slot that does <strong>NOT</strong> violate the rules
in case your rule abuse excuse is rejected. If you do submit such an
alternate non-rule abusing version, <strong>PLEASE</strong> indicate that in your
<code>remarks.md</code> file of your non-rule abusing version so that the <a href="../judges.html">IOCCC
judges</a> do not think you uploaded a duplicate into a
wrong slot by mistake.
</p>
<p class="leftbar">
See also <a href="#rule13">Rule 12</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule0">
<h2 id="rule-0">Rule 0</h2>
@@ -581,18 +622,16 @@ Your submission must be a C program.
<p class="leftbar">
You see, the contest is not called the <strong>International Obfuscated JSON Contest</strong>
(<strong>IOJSONC</strong>), even if the <a href="https://github.com/xexyl/jparse/blob/master/json_README.md#so-called-json-spec">so-called JSON
spec</a> might be called obfuscated. :-)
spec</a> might be called obfuscated
by some people. :-)
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule2">
<h2 id="rule-2">Rule 2</h2>
</div>
<p>The size rule requires your submission to satisfy <strong>BOTH</strong> <a href="#rule2a">Rule 2a</a> and <a href="#rule2b">Rule 2b</a>:</p>
<p><a href="#rule2">Rule 2</a> requires that your submission satisfy <strong>BOTH</strong> <a href="#rule2a">Rule 2a</a> and <a href="#rule2b">Rule 2b</a>.</p>
<p class="leftbar">
If you use the most recently released official IOCCC submission
packaging tool (hereby referred to as <code>mkiocccentry(1)</code>), which we <strong>STRONGLY
recommend you do</strong> (see also <a href="#rule17">Rule 17</a>), then the <code>mkiocccentry(1)</code>
tool will warn you if there appears to be a <a href="#rule2a">Rule 2a</a> violation.
See also <a href="#rule2a">Rule 2a</a>, <a href="#rule2b">Rule 2b</a>, and <a href="#rule17">Rule 17</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule2a">
@@ -602,21 +641,7 @@ tool will warn you if there appears to be a <a href="#rule2a">Rule 2a</a> violat
The size of your program source <strong>should NOT exceed 4993 bytes</strong>.
</p>
<p class="leftbar">
The <code>mkiocccentry(1)</code> tool will give you the option of overriding the <a href="#rule2a">Rule
2a</a> warning. Overriding the <a href="#rule2a">Rule 2a</a> warning carries a
<strong>fair amount of risk that your submission will be rejected</strong>. Be sure to
consult the <a href="guidelines.html">IOCCC guidelines</a> ahead of time if you plan to
override the <a href="#rule2a">Rule 2a</a> warning.
</p>
<p class="leftbar">
If you do override the <a href="#rule2a">Rule 2a</a> warning from the <code>mkiocccentry(1)</code>
tool, or otherwise plan to violate <a href="#rule2a">Rule 2a</a>, then you <strong>MUST CLEARLY
EXPLAIN THE RATIONALE</strong> of why you are doing so in your <code>remarks.md</code> file.
<strong><em>Even if you do</em> explain this in your <code>remarks.md</code> file you submission may
still be rejected</strong>.
</p>
<p class="leftbar">
You may check your code prior to submission by giving the filename
You may check your code with respect to <a href="#rule2">Rule 2</a> prior to submission by giving the filename
as a command like argument to the <code>iocccsize(1)</code> tool. For example:
</p>
<pre><code> iocccsize prog.c</code></pre>
@@ -624,8 +649,7 @@ as a command like argument to the <code>iocccsize(1)</code> tool. For example:
Alternatively, you may use the <code>mkiocccentry(1)</code> option <code>-d</code> to verify that
things check out okay (i.e. no problems are detected) without having to answer
all the questions. See the
FAQ on “<a href="../faq.html#mkiocccentry_test">how to test your submission without having
to answer questions</a>” for more details.
FAQ on “<a href="../faq.html#mkiocccentry_test">how to rule test your submission</a>” for more details.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule2b">
@@ -642,29 +666,17 @@ The source to <code>iocccsize(1)</code> may be found in the
</p>
<p class="leftbar">
If you use the <code>mkiocccentry(1)</code> tool, which we <strong>STRONGLY recommend
you do</strong> (again, see also <a href="#rule17">Rule 17</a>),
then <code>mkiocccentry(1)</code> will invoke the <code>iocccsize(1)</code> checks before packaging
you do</strong> then <code>mkiocccentry(1)</code> will invoke the <code>iocccsize(1)</code> checks before packaging
your submission.
</p>
<p class="leftbar">
The <code>mkiocccentry(1)</code> tool will give you the option of overriding the <a href="#rule2b">Rule
2b</a> warning. Overriding the <a href="#rule2b">Rule 2b</a> warning carries a <strong>fair
amount of risk that your submission will be rejected</strong>. Be sure to consult the
<a href="guidelines.html">IOCCC guidelines</a> ahead of time if you plan to override the
<a href="#rule2b">Rule 2b</a> warning.
</p>
<p class="leftbar">
If you do override the <a href="#rule2b">Rule 2b</a> warning from the <code>mkiocccentry(1)</code>
tool, or otherwise plan to violate <a href="#rule2b">Rule 2b</a>, then you <strong>MUST CLEARLY
EXPLAIN THE RATIONALE</strong> of why you are doing so in your <code>remarks.md</code> file.
<strong><em>Even if you do</em> explain this in your <code>remarks.md</code> file your submission may
still be rejected</strong>.
</p>
<p class="leftbar">
You may check your code prior to submission by giving the filename
as a command like argument to the <code>iocccsize(1)</code> tool. For example:
</p>
<pre><code> iocccsize prog.c</code></pre>
<p class="leftbar">
See also <a href="#rule17">Rule 17</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule3">
<h2 id="rule-3">Rule 3</h2>
@@ -675,26 +687,28 @@ You may <a href="register.html">register</a> while the contest is either
<strong><a href="../faq.html#pending">pending</a></strong> or <strong><a href="../faq.html#open">open</a></strong>.
</p>
<p class="leftbar">
See the
FAQ on “<a href="../quick-start.html#enter">how to register and submit to the IOCCC</a>”
for instructions on registering and participating in the IOCCC, as the process has changed from previous years!
</p>
<p class="leftbar">
When the contest is <strong><a href="../faq.html#open">open</a></strong>, an
<a href="../judges.html">IOCCC judge</a> will email you your <a href="https://submit.ioccc.org">submit server</a>
<strong>Username</strong> and <strong>Initial password</strong>. It takes some time (maybe even a few days) for an
<a href="../judges.html">IOCCC judge</a> to process your registration and email you your
initial login and password.
When the contest is <strong><a href="../faq.html#open">open</a></strong>, the <a href="https://submit.ioccc.org">submit server</a>
will email you your <a href="https://submit.ioccc.org">submit server</a>
<strong>Username</strong> and <strong>Initial password</strong>. <strong>Please be patient</strong> as it may take some time,
perhaps as much as a few days, for your registration to be processed and for that email to be sent.
</p>
<p class="leftbar">
Those who <a href="register.html">register</a> while the contest status is <strong><a href="../faq.html#pending">pending</a></strong>
will receive email with their <a href="https://submit.ioccc.org">submit server</a> <strong>Username</strong> and <strong>Initial password</strong>
from an <a href="../judges.html">IOCCC judge</a> shortly after the contest status becomes <strong><a href="../faq.html#open">open</a></strong>.
will receive their email (containing their <a href="https://submit.ioccc.org">submit server</a> <strong>Username</strong>
and <strong>Initial password</strong>), much later: few days around the time when the contest status becomes <strong><a href="../faq.html#open">open</a></strong>.
</p>
<p class="leftbar">
Once an <a href="../judges.html">IOCCC judge</a> emails you your <strong>Username</strong> and <strong>Initial password</strong>, you
Once that email you your <strong>Username</strong> and <strong>Initial password</strong> is sent, you
will have 72 hours to <a href="pw-change.html">change your submit server initial password</a>.
If you do not change your <strong>Initial password</strong> in time, you will have to <a href="register.html">re-register</a>.
</p>
<p class="leftbar">
If you do not change your <strong>Initial password</strong> in time, you will have
to <a href="contact.html">contact an IOCCC judge</a> by email and ask them to reset
your password. Not only is this a hassle for everyone involved, it will
delay your IOCCC registration process, perhaps by a number of days that
<code>egrep(1)</code> would be able to pattern match. By <code>egrep(1)</code>, we refer to the
long standing <strong>UNIX</strong> utility that should just run and <strong>NOT</strong> whine about
the command being deprecated.
</p>
<p class="leftbar">
Because it takes time (maybe even a few days) for an <a href="../judges.html">IOCCC judge</a>
@@ -705,11 +719,13 @@ The <a href="../judges.html">IOCCC judges</a> are <strong>NOT</strong> responsib
or for those who wait until the last minute to try to register!
</p>
<p class="leftbar">
If you have <a href="register.html">registered</a> and received by email your
<a href="https://submit.ioccc.org">submit server</a> <strong>Username</strong> and <strong>Initial password</strong>
from an <a href="../judges.html">IOCCC judge</a>, you may upload your submission to
the <a href="https://submit.ioccc.org">submit server</a> <strong>ONLY</strong> while the
contest is <strong><a href="../faq.html#open">open</a></strong>.
See the
FAQ on “<a href="../quick-start.html#enter">how to register and submit to the IOCCC</a>”
for instructions on registering and participating in the IOCCC, as the process
may change from contest to contest.
</p>
<p class="leftbar">
See also <a href="#rule8">Rule 8</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule4">
@@ -746,9 +762,9 @@ You may use your submission (program) to form a copy, or you can make use of
your <code>Makefile</code> to form that copy.
</p>
<p class="leftbar">
If you do make a copy and then modify that copy, <strong>PLEASE</strong> be sure that
If you do make a copy of a submission file, <strong>PLEASE</strong> be sure that
the <code>clobber</code> rule of your <code>Makefile</code> removes that copy in order to
restore the contents of your submission to its original submission.
in order restore your submission to its original submission state.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule6">
@@ -771,33 +787,43 @@ The obfuscated C program must be your own original work.
</p>
<p class="leftbar">
You (the author(s)) must own the contents of your submission OR
you must have permission from the owner(s) to submit their content
under the following license:
you must have permission from the owner(s) to submit their content.
</p>
<p class="leftbar">
<strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong>
</p>
<p>If you submit any content that is owned by others, you <strong>MUST
If you submit any content that is owned by others, you <strong>MUST
detail that ownership</strong> (i.e., who owns what) <strong><em>AND</em> document the
permission you obtained</strong>.</p>
<p class="leftbar">
Please note that the IOCCC size tool, the tools in the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry
repo</a> and the tools and library in
the <a href="https://github.com/xexyl/jparse/issues">jparse repo</a> (that the
<a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry repo</a> clones) or the
<a href="https://github.com/lcn2/dbg">dbg repo</a> (that the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry
repo</a> clones) or the <a href="https://github.com/lcn2/dyn_array">dyn_array
repo</a> (that the <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry
repo</a> clones) are
<strong>NOT</strong> original works, unless of course you’re the respective authors, in
which case they are. Of course, neither are any of the previous
winning entries, unless of course you’re the winner! :-)
permission you obtained</strong> in your <code>remarks.md</code> file.
</p>
<p class="leftbar">
<p>You are allowed to use tools to develop and test your submission.
These tools may include, but are not limited to code generators, code
analysis tools, machine learning tools, natural language models, code
copilot tools, etc.</p>
Please note that <a href="https://github.com/ioccc-src/mkiocccentry">mkiocccentry repo tools</a>
are <strong>NOT</strong> original works, unless of course you’re the respective authors, in
which case they are original. :-)
</p>
<p class="leftbar">
Nevertheless tools such as those listed are <strong>NOT</strong> obfuscated. If submitted, they
would probably violate a number of rules. :-)
</p>
<p class="leftbar">
<ul>
<li><a href="https://github.com/ioccc-src/mkiocccentry/blob/master/mkiocccentry.c">mkioccentry(1)</a></li>
<li><a href="https://github.com/ioccc-src/mkiocccentry/blob/master/iocccsize.c">iooccsize(1)</a></li>
<li><a href="https://github.com/ioccc-src/mkiocccentry/blob/master/chkentry.c">chkentry(1)</a></li>
<li><a href="https://github.com/ioccc-src/mkiocccentry/blob/master/txzchk.c">txzchk(1)</a></li>
<li><a href="https://github.com/xexyl/jparse">jparse repo as cloned by the mkiocccentry repo</a></li>
<li><a href="https://github.com/lcn2/dbg">dbg repo as cloned by the mkiocccentry repo</a></li>
<li><a href="https://github.com/lcn2/dyn_array">dyn_array repo as cloned by the mkiocccentry repo</a></li>
</ul>
</p>
<p class="leftbar">
The IOCCC has a rich history of remarkable winning entries created by
authors who skillfully employed various techniques to develop their code.
While it is <strong>NOT</strong> required, you are allowed to use tools to develop
and test your submission. These tools may include, but are not limited
to code generators, code analysis tools, static code analysis tools,
runtime analysis tools, machine learning tools, natural language models,
code copilot tools, so-called AI services, large language models, etc.
If you do make use of such tools, then we <strong>ENCOURAGE you to describe
how you used such tools</strong> in your <code>remarks.md</code> file.
</p>
<p class="leftbar">
See also <a href="#rule5">Rule 5</a>, <a href="#rule18">Rule 18</a> and <a href="#rule21">Rule 21</a>.
@@ -811,8 +837,15 @@ Submissions may only be uploaded to the <a href="https://submit.ioccc.org">IOCCC
while the contest is <strong><a href="../faq.html#open">open</a></strong>.
</p>
<p class="leftbar">
If you have <a href="register.html">registered</a> and received by email your
<a href="https://submit.ioccc.org">submit server</a> <strong>Username</strong> and <strong>Initial password</strong>
from an <a href="../judges.html">IOCCC judge</a>, you may upload your submission to
the <a href="https://submit.ioccc.org">submit server</a> <strong>ONLY</strong> while the
contest is <strong><a href="../faq.html#open">open</a></strong>.
</p>
<p class="leftbar">
The <a href="https://submit.ioccc.org">submit server</a>, in accordance with <a href="rules.html#rule17">Rule 17</a>,
places a limit of <strong>3999971</strong> octets on the size of your upload.
places a limit of <strong>3999971</strong> bytes on the size of your upload.
</p>
<p class="leftbar">
Once the contest is in the <strong><a href="../faq.html#judging">judging</a></strong> state (or
@@ -843,7 +876,7 @@ for more information about the <code>mkiocccentry(1)</code> tool.
See the “<a href="#dates">Important IOCCC dates</a>” section above for when these contest states are scheduled.
</p>
<p class="leftbar">
See also <a href="#rule17">Rule 17</a>.
See also <a href="#rule3">Rule 3</a> and <a href="#rule17">Rule 17</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule9">
@@ -888,6 +921,9 @@ it is needed in your submission’s <code>remarks.md</code> file.</p>
the opinion of the <a href="../judges.html">judges</a>, violates the rules WILL BE DISQUALIFIED</strong>.
Submissions that attempt to abuse the rules <strong>MUST</strong> try to justify why
their rule abuse is legal, in the <code>remarks.md</code> file.</p>
<p class="leftbar">
See also <a href="#rule_abuse">the warning about rule abuse</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule13">
<h2 id="rule-13">Rule 13</h2>
@@ -905,11 +941,23 @@ Fun fact: the fear of the number 13 is called <em>triskaidekaphobia</em>.
</div>
<p class="leftbar">
Any C source that fails to compile because of lines with trailing
control-M’s (i.e., lines with a trailing octet <code>015</code>) <strong><em>might</em></strong> be rejected.
control-M’s (i.e., lines with a trailing byte <code>015</code>) <strong><em>might</em></strong> be rejected.
</p>
<p class="leftbar">
Please do <strong>NOT</strong> put trailing control-M’s on <code>prog.c</code>, <code>Makefile</code>, or
<code>remarks.md</code> files but instead end lines with a trailing newline (i.e.,
byte <code>012</code>) character.
</p>
<p class="leftbar">
As we do <strong>NOT</strong> DOS, please also be sure that the <code>Makefile</code> and
<code>remarks.md</code> files end in final newline (i.e., byte <code>012</code>) character.
</p>
<p class="leftbar">
You are permitted, in order to try and squeeze your <code>prog.c</code> under
a <a href="#rule2a">Rule 2a</a> and/or <a href="#rule2b">Rule 2b</a> limit, to <strong>NOT</strong>
end your <code>prog.c</code> with a newline (i.e., byte <code>012</code>) character.
If you need to do this, <strong>PLEASE</strong> document that in your <code>remarks.md</code> file.
</p>
<p>Please do <strong>NOT</strong> put trailing control-M’s on remarks file lines.
Please check to be sure, before submitting, that you have removed
any control-M at the end of remark file lines.</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule15">
<h2 id="rule-15">Rule 15</h2>
@@ -917,8 +965,10 @@ any control-M at the end of remark file lines.</p>
<p class="leftbar">
In order to register for the IOCCC, you <strong>MUST</strong> have a valid email address.
</p>
<p>The <a href="../judges.html">judges</a> <strong>are NOT responsible for delays in email</strong>, please plan
enough time for the exchange of emails so you can upload your submission.</p>
<p class="leftbar">
The <a href="../judges.html">judges</a> <strong>are NOT responsible for delays in email</strong>, so please plan
enough time accordingly.
</p>
<p class="leftbar">
See the
FAQ on “<a href="../quick-start.html#register">how to register</a>”
@@ -928,70 +978,59 @@ for details.
<div id="rule16">
<h2 id="rule-16">Rule 16</h2>
</div>
<p>You are <strong>STRONGLY</strong> encouraged to submit an <strong>original submission</strong>.
Submissions that are similar to previous entries are
discouraged. As we judge anonymously, submissions that have already
been published may be disqualified.</p>
<p>Submissions that are similar to previous winning IOCCC entries are discouraged.</p>
<p class="leftbar">
You are allowed to re-submit to a later contest, a submission that
did not win the IOCCC. If you do so, then you would be well advised
to try and enhance and improve your submission.
If you do re-submit something that did not previously win, then
you are <strong>encouraged</strong> to mention this in your <code>remarks.md</code> file
as this sometimes helps.
</p>
<p class="leftbar">
Re-submitting an improved submission that did not become an
IOCCC winning entry is a <strong>time honored</strong> tradition of the IOCCC.
There are some IOCCC winning entries that were submitted to multiple contests
before they were improved enough to “climb over” (as the expression
goes) all the other submissions for a given contest.
</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule17">
<h2 id="rule-17">Rule 17</h2>
</div>
<p class="leftbar">
Your submission must be in the form of <strong>xz compressed tarball</strong>
that <code>mkiocccentry(1)</code> tool would generate. The files, directories,
and paths <strong>MUST</strong> conform to the limits imposed by <code>mkiocccentry(1)</code>
including but <strong>NOT LIMITED</strong> to their names, count, path length
and directory tree depth.
Your submission must be in the form of a <strong>xz compressed tarball</strong> that
the current released version of the <code>mkiocccentry(1)</code> tool would generate.
The files, directories, and paths <strong>MUST</strong> conform to the limits imposed
by <code>mkiocccentry(1)</code> including but <strong>NOT LIMITED</strong> to their names, count,
path length and directory tree depth.
</p>
<p class="leftbar">
Your <strong>xz compressed tarball</strong> submission file must pass the tests performed by:
</p>
<ul>
<li><p class="leftbar">
<code>txzchk(1)</code>
</p></li>
</ul>
<p class="leftbar">
Your <strong>xz compressed tarball</strong> submission filename must pass the tests performed by:
</p>
<ul>
<li><p class="leftbar">
<code>fnamchk(1)</code>
</p></li>
</ul>
<p class="leftbar">
The resulting directory produced when your <strong>xz compressed tarball</strong> submission file uncompressed
must pass the checks performed by:
</p>
<ul>
<li><p class="leftbar">
<code>chkentry(1)</code>
</p></li>
</ul>
<p class="leftbar">
<code>txzchk(1)</code> uses the <code>fnamchk(1)</code> tool on your tarball to obtain the proper
directory name. If either name is wrong, it will be flagged as an error.
Your <strong>xz compressed tarball</strong> must be larger than <strong>0</strong> bytes and no larger than <strong>3999971</strong> bytes.
</p>
<p class="leftbar">
The resulting <code>prog.c</code> file must pass the <a href="#rule2">Rule 2</a> size checked performed by:
The sum of the byte lengths of all files, after the <strong>xz compressed tarball</strong> is un-tarred,
must not exceed <strong>27651*1024</strong> bytes.
</p>
<ul>
<li><p class="leftbar">
<code>iocccsize(1)</code>
</p></li>
</ul>
<p class="leftbar">
The <code>.auth.json</code> and <code>.info.json</code> must be compatible with what hat <code>mkiocccentry(1)</code> tool
would produce as well as pass the tests performed by:
Your <strong>xz compressed tarball</strong> submission file must pass the tests performed by the current version of <code>txzchk(1)</code>.
</p>
<p class="leftbar">
Your <strong>xz compressed tarball</strong> submission filename must pass the tests performed by the current version of <code>fnamchk(1)</code>.
</p>
<p class="leftbar">
When your <strong>xz compressed tarball</strong> submission file is un-tarred, the
resulting directory must pass the checks performed by the current version of <code>chkentry(1)</code>.
</p>
<p class="leftbar">
The resulting <code>prog.c</code> file must pass the <a href="#rule2">Rule 2</a> size checks performed by the current
version of <code>iocccsize(1)</code>.
</p>
<p class="leftbar">
The <code>.auth.json</code> and <code>.info.json</code> must be compatible with what the
current version of the <code>mkiocccentry(1)</code> tool would produce. They must
also pass the tests performed by the current version of <code>chkentry(1)</code>.
</p>
<ul>
<li><p class="leftbar">
<code>jparse(3)</code>
</p></li>
<li><p class="leftbar">
<code>chkentry(1)</code>
</p></li>
</ul>
<p class="leftbar">
The <code>Makefile</code> must <strong>NOT</strong> be empty.
</p>
@@ -999,15 +1038,17 @@ The <code>Makefile</code> must <strong>NOT</strong> be empty.
The <code>remarks.md</code> must <strong>NOT</strong> be empty.
</p>
<h3 id="tldr-rule-17---use-mkiocccentry1-to-form-your-submission">TL;DR Rule 17 - Use <code>mkiocccentry(1)</code> to form your submission</h3>
<p>Let the <code>mkiocccentry(1)</code> tool form your <strong>xz compressed tarball</strong> submission
file and don’t try to override its checks and limits, in order to be sure you
submission conforms to this rule.</p>
<p class="leftbar">
Let the current version of the <code>mkiocccentry(1)</code> tool form your <strong>xz
compressed tarball</strong> submission file.
</p>
<h3 id="warning">Warning</h3>
<p>Using command line flags or input prompts to override checks and
<p class="leftbar">
Using command line flags or input prompts to override checks and
limits made by the above mentioned tools is <strong>NOT</strong> recommended
and may result in your submission being rejected by the <a href="https://submit.ioccc.org">IOCCC
submit server</a> and/or the <a href="../judges.html">IOCCC
Judges</a>.</p>
submit server</a> and/or the <a href="../judges.html">IOCCC Judges</a>.
</p>
<p class="leftbar">
See the
FAQ on the “<a href="../faq.html#mkiocccentry">mkiocccentry tool</a>
@@ -1024,22 +1065,46 @@ for very important details behind this rule.
</div>
<p>The entirety of your submission must be submitted under the following license:</p>
<p class="leftbar">
<strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong>
<ul>
<li><strong><a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0 DEED Attribution-ShareAlike 4.0 International</a></strong></li>
</ul>
</p>
<p class="leftbar">
See also <a href="#rule7">Rule 7</a>.
</p>
<p>You (the author(s)) <strong>MUST</strong> own the content of your submission <strong>OR</strong>
you <strong>MUST HAVE PERMISSION</strong> from the owner(s) to submit their content.</p>
<p>You <strong>MUST NOT</strong> submit anything that cannot be submitted under that license.</p>
<p>Jump to: <a href="#">top</a></p>
<div id="rule19">
<h2 id="rule-19">Rule 19</h2>
</div>
<p class="leftbar">
The <code>remarks.md</code> file, a required non-empty file, must be written in
markdown format. See the <a href="http://daringfireball.net/projects/markdown/basics">Daring Fireball Markdown:
Basics</a>.
<a href="https://www.markdownguide.org/basic-syntax/">Markdown format</a>.
</p>
<p class="leftbar">
We currently use <a href="https://pandoc.org">pandoc</a> to convert markdown to HTML.
We currently use <a href="https://pandoc.org">pandoc(1)</a> to automatically convert markdown to HTML.
Please try to avoid submitting an HTML file translation to any markdown file.
If you <strong>MUST</strong> submit such an HTML translation, <strong>PLEASE</strong> mention this in your <code>remarks.md</code> file.
</p>
<p class="leftbar">
For any submission that wins the contest, we modify your <code>remarks.md</code> file and
rename it as <code>README.md</code> and then use <a href="https://pandoc.org">pandoc(1)</a> to generate
the <code>index.html</code> file in the top level directory of your submission.
For this reason, please do <strong>NOT</strong> submit a <code>README.md</code> file, <strong>NOR</strong> an <code>index.html</code>
file in the top level directory where your <code>remarks.md</code> file resides.
</p>
<p class="leftbar">
See the <a href="https://www.markdownguide.org/cheat-sheet/">Markdown Cheat Sheet</a>
for a handy quick reference to the Markdown syntax.
</p>
<p class="leftbar">
See the <a href="https://www.markdownguide.org">Markdown guide</a>
for free and open-source reference guide that explains
how to use markdown.
</p>
<p class="leftbar">
See also the <a href="http://daringfireball.net/projects/markdown/basics">Daring Fireball Markdown:
Basics</a> for
information on the markdown format.
</p>
<p class="leftbar">
Please see our FAQ “<a href="../faq.html#remarks_md">remarks.md</a>” and the <a href="../markdown.html">IOCCC markdown
@@ -1088,9 +1153,14 @@ available in the <code>$PATH</code> search path.
<p>Your submission <strong>MUST NOT</strong> create or modify files <strong>ABOVE</strong> the current directory
<em>with the exception of</em> the <code>/tmp</code> and the <code>/var/tmp</code> directories. Your submission
<strong>MAY</strong> create subdirectories below the current directory, or in <code>/tmp</code>,
or in <code>/var/tmp</code> provided that <code>.</code> is <strong>NOT</strong> the first octet in any
or in <code>/var/tmp</code> provided that <code>.</code> is <strong>NOT</strong> the first byte in any
directory name or filename you create.</p>
<p class="leftbar">
If you do create files and directories, <strong>PLEASE</strong> be sure that
the <code>clobber</code> rule of your <code>Makefile</code> removes such created files
in order restore your submission to its original submission state.
</p>
<p class="leftbar">
See also <a href="#rule5">Rule 5</a>.
</p>
<p>Jump to: <a href="#">top</a></p>
@@ -1154,7 +1224,7 @@ Unless otherwise needed, <a href="#rule27">Rule 27</a> is reserved for something
<h2 id="rule-28">Rule 28</h2>
</div>
<p class="leftbar">
<a href="#rule28">Rule 28</a> is a perfect way end to the list of <a href="rules.html">IOCCC rules</a>
<a href="#rule28">Rule 28</a> is a perfect way to end the list of <a href="rules.html">IOCCC rules</a>
as we do <strong>NOT</strong> plan to have <strong>496</strong> rules. :-)
</p>
<p>Jump to: <a href="#">top</a></p>
@@ -1167,13 +1237,12 @@ as we do <strong>NOT</strong> plan to have <strong>496</strong> rules. :-)
For questions or comments about the contest, see <a href="../contact.html">Contacting the IOCCC</a>.
</p>
<p class="leftbar">
<strong>Be SURE</strong> to review the <a href="index.html">IOCCC Rules and Guidelines</a> as
<a href="rules.html">IOCCC rules</a> and the <a href="guidelines.html">IOCCC guidelines</a> may (and
<strong>often do</strong>) change from year to year.
<strong>Be SURE</strong> to review the <a href="index.html">IOCCC Rules and Guidelines</a> as they
may (and <strong>often do</strong>) change from year to year.
</p>
<p class="leftbar">
You should be sure you have the current <a href="rules.html">IOCCC rules</a> and
<a href="guidelines.html">IOCCC guidelines</a> prior to submitting entries.
<strong>PLEASE</strong> be sure you have the current <a href="rules.html">IOCCC rules</a> and
<a href="guidelines.html">IOCCC guidelines</a> prior to submitting to the contest.
</p>
<p>See the <a href="../news.html">Official IOCCC website news</a> for additional information.</p>
<p class="leftbar">
@@ -1188,6 +1257,10 @@ should refresh the page <strong>even if you do follow us</strong></em>.
Check out the <a href="https://www.ioccc.org/index.html">Official IOCCC winner website</a> in general.
</p>
<p class="leftbar">
Consider joining the IOCCC discord community via this link:
<a href="https://discord.gg/Wa42Qujwnw">https://discord.gg/Wa42Qujwnw</a>
</p>
<p class="leftbar">
See the
FAQ on “<a href="../faq.html#mkiocccentry">obtaining and compiling the mkiocccentry tools</a>”
and the