From d3aff7d14e66f19a8e4e9a3315494ad612ccc1f5 Mon Sep 17 00:00:00 2001 From: Sadeep Madurange Date: Sat, 3 Jan 2026 16:07:15 +0800 Subject: Remove 'log' from navlink, update cu response, change to lup. --- _includes/nav.html | 5 +- _log/site-search.md | 2 +- _site/404.html | 5 +- _site/about/index.html | 8 +- _site/cgi-bin/find.cgi | 3 +- _site/feed.xml | 2 +- _site/index.html | 20 ++- _site/log/arduino-due/index.html | 5 +- _site/log/arduino-uno/index.html | 5 +- _site/log/bumblebee/index.html | 5 +- _site/log/e-reader/index.html | 5 +- _site/log/etlas/index.html | 5 +- _site/log/fpm-door-lock-lp/index.html | 5 +- _site/log/fpm-door-lock-rf/index.html | 5 +- _site/log/index.html | 212 -------------------------- _site/log/matrix-digital-rain/index.html | 5 +- _site/log/mosfet-switches/index.html | 5 +- _site/log/neo4j-a-star-search/index.html | 5 +- _site/log/site-search/index.html | 7 +- _site/posts.xml | 3 +- _site/projects/index.html | 5 +- _site/sitemap.xml | 3 - about.html | 3 +- cgi-bin/_site/feed.xml | 1 + cgi-bin/_site/find.cgi | 247 +++++++++++++++++++++++++++++++ cgi-bin/_site/indexer.pl | 116 +++++++++++++++ cgi-bin/_site/robots.txt | 1 + cgi-bin/_site/sitemap.xml | 3 + cgi-bin/find.cgi | 3 +- index.html | 4 +- log.html | 13 -- 31 files changed, 408 insertions(+), 308 deletions(-) delete mode 100644 _site/log/index.html create mode 100644 cgi-bin/_site/feed.xml create mode 100644 cgi-bin/_site/find.cgi create mode 100644 cgi-bin/_site/indexer.pl create mode 100644 cgi-bin/_site/robots.txt create mode 100644 cgi-bin/_site/sitemap.xml delete mode 100644 log.html diff --git a/_includes/nav.html b/_includes/nav.html index 0b7b631..9ab3434 100644 --- a/_includes/nav.html +++ b/_includes/nav.html @@ -4,9 +4,6 @@
  • hme
  • -
  • - log -
  • poc
  • @@ -14,7 +11,7 @@ abt
  • - sws + lup
  • rss diff --git a/_log/site-search.md b/_log/site-search.md index 61e4bba..2a552f6 100644 --- a/_log/site-search.md +++ b/_log/site-search.md @@ -282,6 +282,6 @@ Verdict: Fast SA index lookup. Mitigated primary attack vectors. No dependencies. Works on every conceivable device. Commit: -[9889aca](https://git.asciimx.com/www/commit/?h=term&id=9889acaac984817731ad9f9355f067f9acd02efd) +[6da102d](https://git.asciimx.com/www/commit/?h=term&id=6da102d6e0494a3eac3f05fa3b2cdcc25ba2754e) | Benchmarks: [8a4da68](https://git.asciimx.com/site-search-bm/commit/?id=8a4da6809cf9368cd6a5dd7351181ea4256453f9) diff --git a/_site/404.html b/_site/404.html index 89257c3..b210b74 100644 --- a/_site/404.html +++ b/_site/404.html @@ -19,9 +19,6 @@
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  • @@ -29,7 +26,7 @@ abt
  • - sws + lup
  • rss diff --git a/_site/about/index.html b/_site/about/index.html index 35bd281..6b4d19b 100644 --- a/_site/about/index.html +++ b/_site/about/index.html @@ -19,9 +19,6 @@
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  • rss @@ -55,10 +52,9 @@ diff --git a/_site/cgi-bin/find.cgi b/_site/cgi-bin/find.cgi index ab066dd..d3c6cc4 100644 --- a/_site/cgi-bin/find.cgi +++ b/_site/cgi-bin/find.cgi @@ -216,10 +216,9 @@ sub render_html { diff --git a/_site/feed.xml b/_site/feed.xml index 9ccb174..5026409 100644 --- a/_site/feed.xml +++ b/_site/feed.xml @@ -1 +1 @@ -Jekyll2026-01-02T19:06:26+08:00/feed.xmlASCIIMX | LogW. D. Sadeep MadurangeMatrix Rain: 2025 refactor2025-12-21T00:00:00+08:002025-12-21T00:00:00+08:00/log/matrix-digital-rainW. D. Sadeep MadurangeFingerprint door lock (LP)2025-08-18T00:00:00+08:002025-08-18T00:00:00+08:00/log/fpm-door-lock-lpW. D. Sadeep MadurangeHigh-side MOSFET switching2025-06-22T00:00:00+08:002025-06-22T00:00:00+08:00/log/mosfet-switchesW. D. Sadeep MadurangeATmega328P at 3.3V and 5V2025-06-10T00:00:00+08:002025-06-10T00:00:00+08:00/log/arduino-unoW. D. Sadeep MadurangeFingerprint door lock (RF)2025-06-05T00:00:00+08:002025-06-05T00:00:00+08:00/log/fpm-door-lock-rfW. D. Sadeep MadurangeBumblebee: browser automation2025-04-02T00:00:00+08:002025-04-02T00:00:00+08:00/log/bumblebeeW. D. Sadeep MadurangeBare-metal ATSAM3X8E2024-09-16T00:00:00+08:002024-09-16T00:00:00+08:00/log/arduino-dueW. D. Sadeep MadurangeEtlas: e-paper dashboard2024-09-05T00:00:00+08:002024-09-05T00:00:00+08:00/log/etlasW. D. Sadeep MadurangeESP32 e-reader prototype2023-10-24T00:00:00+08:002023-10-24T00:00:00+08:00/log/e-readerW. D. Sadeep MadurangeNeo4j shortest path optimization2018-03-06T00:00:00+08:002018-03-06T00:00:00+08:00/log/neo4j-a-star-searchW. D. Sadeep Madurange +Jekyll2026-01-03T16:04:13+08:00/feed.xmlASCIIMX | LogW. D. Sadeep MadurangeSite search with Perl + CGI + SA2026-01-02T00:00:00+08:002026-01-02T00:00:00+08:00/log/site-searchW. D. Sadeep MadurangeMatrix Rain: 2025 refactor2025-12-21T00:00:00+08:002025-12-21T00:00:00+08:00/log/matrix-digital-rainW. D. Sadeep MadurangeFingerprint door lock (LP)2025-08-18T00:00:00+08:002025-08-18T00:00:00+08:00/log/fpm-door-lock-lpW. D. Sadeep MadurangeHigh-side MOSFET switching2025-06-22T00:00:00+08:002025-06-22T00:00:00+08:00/log/mosfet-switchesW. D. Sadeep MadurangeATmega328P at 3.3V and 5V2025-06-10T00:00:00+08:002025-06-10T00:00:00+08:00/log/arduino-unoW. D. Sadeep MadurangeFingerprint door lock (RF)2025-06-05T00:00:00+08:002025-06-05T00:00:00+08:00/log/fpm-door-lock-rfW. D. Sadeep MadurangeBumblebee: browser automation2025-04-02T00:00:00+08:002025-04-02T00:00:00+08:00/log/bumblebeeW. D. Sadeep MadurangeBare-metal ATSAM3X8E2024-09-16T00:00:00+08:002024-09-16T00:00:00+08:00/log/arduino-dueW. D. Sadeep MadurangeEtlas: e-paper dashboard2024-09-05T00:00:00+08:002024-09-05T00:00:00+08:00/log/etlasW. D. Sadeep MadurangeESP32 e-reader prototype2023-10-24T00:00:00+08:002023-10-24T00:00:00+08:00/log/e-readerW. D. Sadeep Madurange \ No newline at end of file diff --git a/_site/index.html b/_site/index.html index 57ba207..9a10f2d 100644 --- a/_site/index.html +++ b/_site/index.html @@ -19,9 +19,6 @@
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  • @@ -29,7 +26,7 @@ abt
  • - sws + lup
  • rss @@ -46,7 +43,7 @@ $ cu -l /dev/asciimx
    - NMI_LNK: SIG_ASSERT [0x53] + UNIX / EMBED / -O3
    @@ -189,6 +186,19 @@ + + + Neo4j shortest path optimization + + + + + + + + diff --git a/_site/log/arduino-due/index.html b/_site/log/arduino-due/index.html index 7bc8a0b..d9cc946 100644 --- a/_site/log/arduino-due/index.html +++ b/_site/log/arduino-due/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/arduino-uno/index.html b/_site/log/arduino-uno/index.html index 0fa997e..3eee3a3 100644 --- a/_site/log/arduino-uno/index.html +++ b/_site/log/arduino-uno/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/bumblebee/index.html b/_site/log/bumblebee/index.html index 4c45649..f1881aa 100644 --- a/_site/log/bumblebee/index.html +++ b/_site/log/bumblebee/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/e-reader/index.html b/_site/log/e-reader/index.html index a4d740d..23d409b 100644 --- a/_site/log/e-reader/index.html +++ b/_site/log/e-reader/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/etlas/index.html b/_site/log/etlas/index.html index 86c9627..9362917 100644 --- a/_site/log/etlas/index.html +++ b/_site/log/etlas/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/fpm-door-lock-lp/index.html b/_site/log/fpm-door-lock-lp/index.html index e110158..54c471c 100644 --- a/_site/log/fpm-door-lock-lp/index.html +++ b/_site/log/fpm-door-lock-lp/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/fpm-door-lock-rf/index.html b/_site/log/fpm-door-lock-rf/index.html index 138d4ea..d6c6b66 100644 --- a/_site/log/fpm-door-lock-rf/index.html +++ b/_site/log/fpm-door-lock-rf/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/index.html b/_site/log/index.html deleted file mode 100644 index 813832d..0000000 --- a/_site/log/index.html +++ /dev/null @@ -1,212 +0,0 @@ - - - - - - - Log - - - - - - - - - - - - -
    - -

    Log

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  • rss diff --git a/_site/log/mosfet-switches/index.html b/_site/log/mosfet-switches/index.html index 032df22..a91f205 100644 --- a/_site/log/mosfet-switches/index.html +++ b/_site/log/mosfet-switches/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/neo4j-a-star-search/index.html b/_site/log/neo4j-a-star-search/index.html index feec42b..00f7886 100644 --- a/_site/log/neo4j-a-star-search/index.html +++ b/_site/log/neo4j-a-star-search/index.html @@ -17,9 +17,6 @@
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  • rss diff --git a/_site/log/site-search/index.html b/_site/log/site-search/index.html index 3c32ba3..65e69e0 100644 --- a/_site/log/site-search/index.html +++ b/_site/log/site-search/index.html @@ -17,9 +17,6 @@
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  • rss @@ -316,7 +313,7 @@ Read-only directory.

    dependencies. Works on every conceivable device.

    Commit: -9889aca +6da102d | Benchmarks: 8a4da68

    diff --git a/_site/posts.xml b/_site/posts.xml index 0136478..64fd4e6 100644 --- a/_site/posts.xml +++ b/_site/posts.xml @@ -1,2 +1 @@ -Jekyll2026-01-02T19:06:26+08:00/posts.xmlASCIIMXW. D. Sadeep Madurange -Jekyll2026-01-03T12:59:44+08:00/posts.xmlASCIIMXW. D. Sadeep Madurange +Jekyll2026-01-03T16:04:13+08:00/posts.xmlASCIIMXW. D. Sadeep Madurange \ No newline at end of file diff --git a/_site/projects/index.html b/_site/projects/index.html index 090c5dc..6bffe61 100644 --- a/_site/projects/index.html +++ b/_site/projects/index.html @@ -19,9 +19,6 @@
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  • rss diff --git a/_site/sitemap.xml b/_site/sitemap.xml index c5fe837..3a7874c 100644 --- a/_site/sitemap.xml +++ b/_site/sitemap.xml @@ -51,9 +51,6 @@ / -/log/ - - /projects/ diff --git a/about.html b/about.html index 1608bf7..ce515a1 100644 --- a/about.html +++ b/about.html @@ -19,10 +19,9 @@ title: About diff --git a/cgi-bin/_site/feed.xml b/cgi-bin/_site/feed.xml new file mode 100644 index 0000000..66f8d32 --- /dev/null +++ b/cgi-bin/_site/feed.xml @@ -0,0 +1 @@ +Jekyll2026-01-03T14:43:24+08:00http://localhost:4000/feed.xml \ No newline at end of file diff --git a/cgi-bin/_site/find.cgi b/cgi-bin/_site/find.cgi new file mode 100644 index 0000000..ab066dd --- /dev/null +++ b/cgi-bin/_site/find.cgi @@ -0,0 +1,247 @@ +#!/usr/bin/perl + +use strict; +use warnings; +use Storable qw(retrieve); +use Encode qw(decode_utf8 encode_utf8); +use URI::Escape qw(uri_unescape); +use HTML::Escape qw(escape_html); + +# Configuration +my $max_parallel = 50; # Max parallel search requests +my $lock_timeout = 30; # Seconds before dropping stale locks +my $max_results = 20; # Max search results to display +my $sa_file = 'sa.bin'; # Suffix Array index +my $cp_file = 'corpus.bin'; # Raw text corpus +my $map_file = 'file_map.dat'; # File metadata +my $lock_dir = '/tmp/search_locks'; # Semaphore directory + +# Concurrency control +mkdir $lock_dir, 0777 unless -d $lock_dir; +my $active_count = 0; +my $now = time(); + +opendir(my $dh, $lock_dir); +while (my $file = readdir($dh)) { + next unless $file =~ /\.lock$/; + my $path = "$lock_dir/$file"; + my $mtime = (stat($path))[9] || 0; + ($now - $mtime > $lock_timeout) ? unlink($path) : $active_count++; +} +closedir($dh); + +# Template variables +my $year = (localtime)[5] + 1900; +my $search_text = ''; + +# Busy check +if ($active_count >= $max_parallel) { + print "Content-Type: text/html\n\n"; + render_html("

    Server busy. Please try again in a few seconds.

    ", "", $year); + exit; +} + +# Create semaphore lock +my $lock_file = "$lock_dir/$$.lock"; +open(my $fh_lock, '>', $lock_file); + +# Query decoding +if (($ENV{QUERY_STRING} || '') =~ /^q=([^&]*)/) { + my $raw_q = $1; + $raw_q =~ tr/+/ /; + $search_text = uri_unescape($raw_q); + $search_text = decode_utf8($search_text // ""); + $search_text =~ s/\P{Print}//g; + $search_text = substr($search_text, 0, 64); + $search_text =~ s/^\s+|\s+$//g; +} + +my $safe_search_text = escape_html($search_text); + +print "Content-Type: text/html\n\n"; + +if ($search_text eq '') { + final_output("

    Please enter a search term above.

    "); +} + +# Binary search +my @results; +my $query = encode_utf8(lc($search_text)); +my $query_len = length($query); + +if (-f $sa_file && -f $cp_file) { + open(my $fh_sa, '<', $sa_file) or die $!; + open(my $fh_cp, '<', $cp_file) or die $!; + binmode($fh_sa); + binmode($fh_cp); + + my $file_map = retrieve($map_file); + my $total_suffixes = (-s $sa_file) / 4; + + # Find left boundary + my ($low, $high) = (0, $total_suffixes - 1); + my $first_hit = -1; + + while ($low <= $high) { + my $mid = int(($low + $high) / 2); + seek($fh_sa, $mid * 4, 0); + read($fh_sa, my $bin_off, 4); + my $off = unpack("L", $bin_off); + seek($fh_cp, $off, 0); + read($fh_cp, my $text, $query_len); + + my $cmp = $text cmp $query; + if ($cmp >= 0) { + $first_hit = $mid if $cmp == 0; + $high = $mid - 1; + } else { + $low = $mid + 1; + } + } + + # Collect results if found + if ($first_hit != -1) { + my $last_hit = $first_hit; + ($low, $high) = ($first_hit, $total_suffixes - 1); + + # Find right boundary + while ($low <= $high) { + my $mid = int(($low + $high) / 2); + seek($fh_sa, $mid * 4, 0); + read($fh_sa, my $bin_off, 4); + my $off = unpack("L", $bin_off); + seek($fh_cp, $off, 0); + read($fh_cp, my $text, $query_len); + + if (($text cmp $query) <= 0) { + $last_hit = $mid if $text eq $query; + $low = $mid + 1; + } else { + $high = $mid - 1; + } + } + + my %seen; + for my $i ($first_hit .. $last_hit) { + seek($fh_sa, $i * 4, 0); + read($fh_sa, my $bin_off, 4); + my $offset = unpack("L", $bin_off); + + foreach my $m (@$file_map) { + if ($offset >= $m->{start} && $offset < $m->{end}) { + if (!$seen{$m->{path}}++) { + # Capture more than 50 chars for trimming + my $snip_start = ($offset - 30 < $m->{start}) ? $m->{start} : $offset - 30; + my $max_len = $m->{end} - $snip_start; + my $read_len = ($max_len > 120) ? 120 : $max_len; + seek($fh_cp, $snip_start, 0); + read($fh_cp, my $raw_snip, $read_len); + + my $snippet = decode_utf8($raw_snip, Encode::FB_QUIET) // $raw_snip; + $snippet =~ s/\s+/ /g; # Normalize whitespace + + # Trim start: Partial word removal + if ($snip_start > $m->{start}) { + $snippet =~ s/^[^\s]*\s//; + } + + # Trim end: Length limit and partial word removal + my $has_more = 0; + if (length($snippet) > 50) { + $snippet = substr($snippet, 0, 50); + $has_more = 1 if $snippet =~ s/\s+[^\s]*$//; + } + elsif ($snip_start + $read_len < $m->{end}) { + # This check handles snippets that are naturally short but + # there's still more text in the article we didn't read + $has_more = 1; + } + + # Cleanup & capitalize + $snippet = ucfirst($snippet); + $snippet = escape_html($snippet) . ($has_more ? "..." : ""); + + my $clean_path = $m->{path}; + $clean_path =~ s|^\.\./_site/||; + + push @results, { + path => $clean_path, + title => $m->{title},, + snippet => $snippet + }; + } + last; + } + } + last if scalar @results >= $max_results; + } + } + close($fh_sa); + close($fh_cp); +} + +# --- Formatting & Output --- +my $list_html = ""; +if (@results == 0) { + $list_html = "

    No results found for \"$safe_search_text\".

    "; +} else { + $list_html = ""; +} + +final_output($list_html); + +# --- Helpers --- +sub final_output { + my ($content) = @_; + render_html($content, $safe_search_text, $year); + if ($fh_lock) { close($fh_lock); unlink($lock_file); } + exit; +} + +sub render_html { + my ($content, $q_val, $yr) = @_; + print <<"HTML"; + + + + + + Search + + + + + +
    +
    +

    Search

    +
    + + +
    + $content +
    +
    + + + +HTML +} + diff --git a/cgi-bin/_site/indexer.pl b/cgi-bin/_site/indexer.pl new file mode 100644 index 0000000..69f6838 --- /dev/null +++ b/cgi-bin/_site/indexer.pl @@ -0,0 +1,116 @@ +#!/usr/bin/perl + +use strict; +use warnings; +use File::Find; +use Storable qw(store); +use Encode qw(encode_utf8); +use HTML::Entities qw(decode_entities); +use Time::HiRes qw(gettimeofday tv_interval); + +my $dir = '../_site/log'; +my $cgi_dir = '../_site/cgi-bin/'; +my $corpus_file = "${cgi_dir}corpus.bin"; +my $sa_file = "${cgi_dir}sa.bin"; +my $map_file = "${cgi_dir}file_map.dat"; + +my %excluded_files = ( + 'index.html' => 1, # /log/index.html +); + +# Start timing +my $t0 = [gettimeofday]; + +my $corpus = ""; +my @file_map; + +print "Building corpus...\n"; + +find({ + wanted => sub { + # Only index index.html files + return unless -f $_ && $_ eq 'index.html'; + + my $rel_path = $File::Find::name; + $rel_path =~ s|^\Q$dir\E/?||; + return if $excluded_files{$rel_path}; + + if (open my $fh, '<:encoding(UTF-8)', $_) { + my $content = do { local $/; <$fh> }; + close $fh; + + my ($title) = $content =~ m|(.*?)|is; + $title //= (split('/', $File::Find::name))[-2]; # Fallback to folder name + $title =~ s/^\s+|\s+$//g; + + # Extract content from
    or use whole file + my ($text) = $content =~ m|
    (.*?)
    |is; + $text //= $content; + + # Strip tags and normalize whitespace + $text =~ s|]*>.*?| |gs; + $text =~ s|]*>.*?| |gs; + $text =~ s|<[^>]+>| |g; + $text = decode_entities($text); + $text =~ s|\s+| |g; + $text =~ s/^\s+|\s+$//g; + + # CRITICAL: Convert to lowercase and then to raw bytes + # This ensures length() and substr() work on byte offsets for seek() + my $raw_entry = encode_utf8(lc($text) . "\0"); + + my $start = length($corpus); + $corpus .= $raw_entry; + + push @file_map, { + start => $start, + end => length($corpus), + title => $title, + path => $File::Find::name + }; + } + }, + no_chdir => 0, +}, $dir); + +print "Sorting suffixes...\n"; + +# Initialize the array of indices +my @sa = 0 .. (length($corpus) - 1); + +# Use a block that forces byte-level comparison +{ + use bytes; + @sa = sort { + # First 64 bytes check (fast path) + (substr($corpus, $a, 64) cmp substr($corpus, $b, 64)) || + # Full string fallback (required for correctness) + (substr($corpus, $a) cmp substr($corpus, $b)) + } @sa; +} + +print "Writing index files to disk...\n"; + +open my $cfh, '>', $corpus_file or die "Cannot write $corpus_file: $!"; +binmode($cfh); # Raw byte mode +print $cfh $corpus; +close $cfh; + +open my $sfh, '>', $sa_file or die "Cannot write $sa_file: $!"; +binmode($sfh); +# Pack as 32-bit unsigned integers (standard 'L') +print $sfh pack("L*", @sa); +close $sfh; + +store \@file_map, $map_file; + +my $elapsed = tv_interval($t0); +my $c_size = -s $corpus_file; +my $s_size = -s $sa_file; + +printf "\nIndexing Complete!\n"; +printf "Total Time: %.4f seconds\n", $elapsed; +printf "Corpus Size: %.2f KB\n", $c_size / 1024; +printf "Suffix Array: %.2f KB\n", $s_size / 1024; +printf "Files Processed: %d\n", scalar(@file_map); + diff --git a/cgi-bin/_site/robots.txt b/cgi-bin/_site/robots.txt new file mode 100644 index 0000000..d297064 --- /dev/null +++ b/cgi-bin/_site/robots.txt @@ -0,0 +1 @@ +Sitemap: http://localhost:4000/sitemap.xml diff --git a/cgi-bin/_site/sitemap.xml b/cgi-bin/_site/sitemap.xml new file mode 100644 index 0000000..9bf9de2 --- /dev/null +++ b/cgi-bin/_site/sitemap.xml @@ -0,0 +1,3 @@ + + + diff --git a/cgi-bin/find.cgi b/cgi-bin/find.cgi index ab066dd..d3c6cc4 100644 --- a/cgi-bin/find.cgi +++ b/cgi-bin/find.cgi @@ -216,10 +216,9 @@ sub render_html { diff --git a/index.html b/index.html index 26da2fd..7d871bc 100644 --- a/index.html +++ b/index.html @@ -10,13 +10,13 @@ title: ASCIIMX $ cu -l /dev/asciimx
    - NMI_LNK: SIG_ASSERT [0x53] + UNIX / EMBED / -O3


    - {% include latest.html limit="10" %} + {% include latest.html limit="50" %} diff --git a/log.html b/log.html deleted file mode 100644 index 084173a..0000000 --- a/log.html +++ /dev/null @@ -1,13 +0,0 @@ ---- -title: Log -layout: default ---- - - -
    - -

    Log

    - - {% include latest.html limit="50" %} - -
    -- cgit v1.2.3