ikiwiki

   1 #!/usr/bin/perl -T
   2
   3 eval 'exec /usr/bin/perl -T -S $0 ${1+"$@"}'
   4     if 0; # not running under some shell
   5 $ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
   6
   7 use warnings;
   8 use strict;
   9 use Memoize;
  10 use File::Spec;
  11 use HTML::Template;
  12 use Getopt::Long;
  13
  14 my (%links, %oldlinks, %oldpagemtime, %renderedfiles, %pagesources);
  15
  16 # Holds global config settings, also used by some modules.
  17 our %config=( #{{{
  18         wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$)},
  19         wiki_link_regexp => qr/\[\[([^\s\]]+)\]\]/,
  20         wiki_file_regexp => qr/(^[-A-Za-z0-9_.:\/+]+$)/,
  21         verbose => 0,
  22         wikiname => "wiki",
  23         default_pageext => ".mdwn",
  24         cgi => 0,
  25         svn => 1,
  26         url => '',
  27         cgiurl => '',
  28         historyurl => '',
  29         diffurl => '',
  30         anonok => 0,
  31         rebuild => 0,
  32         wrapper => undef,
  33         wrappermode => undef,
  34         srcdir => undef,
  35         destdir => undef,
  36         templatedir => "/usr/share/ikiwiki/templates",
  37         setup => undef,
  38         adminuser => undef,
  39 ); #}}}
  40
  41 GetOptions( #{{{
  42         "setup=s" => \$config{setup},
  43         "wikiname=s" => \$config{wikiname},
  44         "verbose|v!" => \$config{verbose},
  45         "rebuild!" => \$config{rebuild},
  46         "wrapper=s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
  47         "wrappermode=i" => \$config{wrappermode},
  48         "svn!" => \$config{svn},
  49         "anonok!" => \$config{anonok},
  50         "cgi!" => \$config{cgi},
  51         "url=s" => \$config{url},
  52         "cgiurl=s" => \$config{cgiurl},
  53         "historyurl=s" => \$config{historyurl},
  54         "diffurl=s" => \$config{diffurl},
  55         "exclude=s@" => sub {
  56                 $config{wiki_file_prune_regexp}=qr/$config{wiki_file_prune_regexp}|$_[1]/;
  57         },
  58         "adminuser=s@" => sub { push @{$config{adminuser}}, $_[1] },
  59         "templatedir=s" => sub { $config{templatedir}=possibly_foolish_untaint($_[1]) },
  60 ) || usage();
  61
  62 if (! $config{setup}) {
  63         usage() unless @ARGV == 2;
  64         $config{srcdir} = possibly_foolish_untaint(shift);
  65         $config{destdir} = possibly_foolish_untaint(shift);
  66         if ($config{cgi} && ! length $config{url}) {
  67                 error("Must specify url to wiki with --url when using --cgi");
  68         }
  69 }
  70 #}}}
  71
  72 sub usage { #{{{
  73         die "usage: ikiwiki [options] source dest\n";
  74 } #}}}
  75
  76 sub error { #{{{
  77         if ($config{cgi}) {
  78                 print "Content-type: text/html\n\n";
  79                 print misctemplate("Error", "<p>Error: @_</p>");
  80         }
  81         die @_;
  82 } #}}}
  83
  84 sub debug ($) { #{{{
  85         return unless $config{verbose};
  86         if (! $config{cgi}) {
  87                 print "@_\n";
  88         }
  89         else {
  90                 print STDERR "@_\n";
  91         }
  92 } #}}}
  93
  94 sub mtime ($) { #{{{
  95         my $page=shift;
  96
  97         return (stat($page))[9];
  98 } #}}}
  99
 100 sub possibly_foolish_untaint { #{{{
 101         my $tainted=shift;
 102         my ($untainted)=$tainted=~/(.*)/;
 103         return $untainted;
 104 } #}}}
 105
 106 sub basename ($) { #{{{
 107         my $file=shift;
 108
 109         $file=~s!.*/!!;
 110         return $file;
 111 } #}}}
 112
 113 sub dirname ($) { #{{{
 114         my $file=shift;
 115
 116         $file=~s!/?[^/]+$!!;
 117         return $file;
 118 } #}}}
 119
 120 sub pagetype ($) { #{{{
 121         my $page=shift;
 122
 123         if ($page =~ /\.mdwn$/) {
 124                 return ".mdwn";
 125         }
 126         else {
 127                 return "unknown";
 128         }
 129 } #}}}
 130
 131 sub pagename ($) { #{{{
 132         my $file=shift;
 133
 134         my $type=pagetype($file);
 135         my $page=$file;
 136         $page=~s/\Q$type\E*$// unless $type eq 'unknown';
 137         return $page;
 138 } #}}}
 139
 140 sub htmlpage ($) { #{{{
 141         my $page=shift;
 142
 143         return $page.".html";
 144 } #}}}
 145
 146 sub readfile ($) { #{{{
 147         my $file=shift;
 148
 149         local $/=undef;
 150         open (IN, "$file") || error("failed to read $file: $!");
 151         my $ret=<IN>;
 152         close IN;
 153         return $ret;
 154 } #}}}
 155
 156 sub writefile ($$) { #{{{
 157         my $file=shift;
 158         my $content=shift;
 159
 160         my $dir=dirname($file);
 161         if (! -d $dir) {
 162                 my $d="";
 163                 foreach my $s (split(m!/+!, $dir)) {
 164                         $d.="$s/";
 165                         if (! -d $d) {
 166                                 mkdir($d) || error("failed to create directory $d: $!");
 167                         }
 168                 }
 169         }
 170
 171         open (OUT, ">$file") || error("failed to write $file: $!");
 172         print OUT $content;
 173         close OUT;
 174 } #}}}
 175
 176 sub findlinks ($$) { #{{{
 177         my $content=shift;
 178         my $page=shift;
 179
 180         my @links;
 181         while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 182                 push @links, lc($1);
 183         }
 184         # Discussion links are a special case since they're not in the text
 185         # of the page, but on its template.
 186         return @links, "$page/discussion";
 187 } #}}}
 188
 189 sub bestlink ($$) { #{{{
 190         # Given a page and the text of a link on the page, determine which
 191         # existing page that link best points to. Prefers pages under a
 192         # subdirectory with the same name as the source page, failing that
 193         # goes down the directory tree to the base looking for matching
 194         # pages.
 195         my $page=shift;
 196         my $link=lc(shift);
 197
 198         my $cwd=$page;
 199         do {
 200                 my $l=$cwd;
 201                 $l.="/" if length $l;
 202                 $l.=$link;
 203
 204                 if (exists $links{$l}) {
 205                         #debug("for $page, \"$link\", use $l");
 206                         return $l;
 207                 }
 208         } while $cwd=~s!/?[^/]+$!!;
 209
 210         #print STDERR "warning: page $page, broken link: $link\n";
 211         return "";
 212 } #}}}
 213
 214 sub isinlinableimage ($) { #{{{
 215         my $file=shift;
 216
 217         $file=~/\.(png|gif|jpg|jpeg)$/;
 218 } #}}}
 219
 220 sub htmllink { #{{{
 221         my $page=shift;
 222         my $link=shift;
 223         my $noimageinline=shift; # don't turn links into inline html images
 224         my $forcesubpage=shift; # force a link to a subpage
 225
 226         my $bestlink;
 227         if (! $forcesubpage) {
 228                 $bestlink=bestlink($page, $link);
 229         }
 230         else {
 231                 $bestlink="$page/".lc($link);
 232         }
 233
 234         return $link if length $bestlink && $page eq $bestlink;
 235
 236         # TODO BUG: %renderedfiles may not have it, if the linked to page
 237         # was also added and isn't yet rendered! Note that this bug is
 238         # masked by the bug mentioned below that makes all new files
 239         # be rendered twice.
 240         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 241                 $bestlink=htmlpage($bestlink);
 242         }
 243         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 244                 return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
 245         }
 246
 247         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 248
 249         if (! $noimageinline && isinlinableimage($bestlink)) {
 250                 return "<img src=\"$bestlink\">";
 251         }
 252         return "<a href=\"$bestlink\">$link</a>";
 253 } #}}}
 254
 255 sub linkify ($$) { #{{{
 256         my $content=shift;
 257         my $page=shift;
 258
 259         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 260                 $1 ? "[[$2]]" : htmllink($page, $2)
 261         }eg;
 262
 263         return $content;
 264 } #}}}
 265
 266 sub htmlize ($$) { #{{{
 267         my $type=shift;
 268         my $content=shift;
 269
 270         if (! $INC{"/usr/bin/markdown"}) {
 271                 no warnings 'once';
 272                 $blosxom::version="is a proper perl module too much to ask?";
 273                 use warnings 'all';
 274                 do "/usr/bin/markdown";
 275         }
 276
 277         if ($type eq '.mdwn') {
 278                 return Markdown::Markdown($content);
 279         }
 280         else {
 281                 error("htmlization of $type not supported");
 282         }
 283 } #}}}
 284
 285 sub backlinks ($) { #{{{
 286         my $page=shift;
 287
 288         my @links;
 289         foreach my $p (keys %links) {
 290                 next if bestlink($page, $p) eq $page;
 291                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 292                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 293
 294                         # Trim common dir prefixes from both pages.
 295                         my $p_trimmed=$p;
 296                         my $page_trimmed=$page;
 297                         my $dir;
 298                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 299                                 defined $dir &&
 300                                 $p_trimmed=~s/^\Q$dir\E// &&
 301                                 $page_trimmed=~s/^\Q$dir\E//;
 302
 303                         push @links, { url => $href, page => $p_trimmed };
 304                 }
 305         }
 306
 307         return sort { $a->{page} cmp $b->{page} } @links;
 308 } #}}}
 309
 310 sub parentlinks ($) { #{{{
 311         my $page=shift;
 312
 313         my @ret;
 314         my $pagelink="";
 315         my $path="";
 316         my $skip=1;
 317         foreach my $dir (reverse split("/", $page)) {
 318                 if (! $skip) {
 319                         $path.="../";
 320                         unshift @ret, { url => "$path$dir.html", page => $dir };
 321                 }
 322                 else {
 323                         $skip=0;
 324                 }
 325         }
 326         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
 327         return @ret;
 328 } #}}}
 329
 330 sub indexlink () { #{{{
 331         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 332 } #}}}
 333
 334 sub finalize ($$$) { #{{{
 335         my $content=shift;
 336         my $page=shift;
 337         my $mtime=shift;
 338
 339         my $title=basename($page);
 340         $title=~s/_/ /g;
 341
 342         my $template=HTML::Template->new(blind_cache => 1,
 343                 filename => "$config{templatedir}/page.tmpl");
 344
 345         if (length $config{cgiurl}) {
 346                 $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
 347                 $template->param(prefsurl => "$config{cgiurl}?do=prefs");
 348                 if ($config{svn}) {
 349                         $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
 350                 }
 351         }
 352
 353         if (length $config{historyurl}) {
 354                 my $u=$config{historyurl};
 355                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
 356                 $template->param(historyurl => $u);
 357         }
 358
 359         $template->param(
 360                 title => $title,
 361                 wikiname => $config{wikiname},
 362                 parentlinks => [parentlinks($page)],
 363                 content => $content,
 364                 backlinks => [backlinks($page)],
 365                 discussionlink => htmllink($page, "Discussion", 1, 1),
 366                 mtime => scalar(gmtime($mtime)),
 367         );
 368
 369         return $template->output;
 370 } #}}}
 371
 372 sub check_overwrite ($$) { #{{{
 373         # Important security check. Make sure to call this before saving
 374         # any files to the source directory.
 375         my $dest=shift;
 376         my $src=shift;
 377
 378         if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
 379                 error("$dest already exists and was rendered from ".
 380                         join(" ",(grep { $renderedfiles{$_} eq $dest } keys
 381                                 %renderedfiles)).
 382                         ", before, so not rendering from $src");
 383         }
 384 } #}}}
 385
 386 sub render ($) { #{{{
 387         my $file=shift;
 388
 389         my $type=pagetype($file);
 390         my $content=readfile("$config{srcdir}/$file");
 391         if ($type ne 'unknown') {
 392                 my $page=pagename($file);
 393
 394                 $links{$page}=[findlinks($content, $page)];
 395
 396                 $content=linkify($content, $page);
 397                 $content=htmlize($type, $content);
 398                 $content=finalize($content, $page,
 399                         mtime("$config{srcdir}/$file"));
 400
 401                 check_overwrite("$config{destdir}/".htmlpage($page), $page);
 402                 writefile("$config{destdir}/".htmlpage($page), $content);
 403                 $oldpagemtime{$page}=time;
 404                 $renderedfiles{$page}=htmlpage($page);
 405         }
 406         else {
 407                 $links{$file}=[];
 408                 check_overwrite("$config{destdir}/$file", $file);
 409                 writefile("$config{destdir}/$file", $content);
 410                 $oldpagemtime{$file}=time;
 411                 $renderedfiles{$file}=$file;
 412         }
 413 } #}}}
 414
 415 sub lockwiki () { #{{{
 416         # Take an exclusive lock on the wiki to prevent multiple concurrent
 417         # run issues. The lock will be dropped on program exit.
 418         if (! -d "$config{srcdir}/.ikiwiki") {
 419                 mkdir("$config{srcdir}/.ikiwiki");
 420         }
 421         open(WIKILOCK, ">$config{srcdir}/.ikiwiki/lockfile") || error ("cannot write to lockfile: $!");
 422         if (! flock(WIKILOCK, 2 | 4)) {
 423                 debug("wiki seems to be locked, waiting for lock");
 424                 my $wait=600; # arbitrary, but don't hang forever to
 425                               # prevent process pileup
 426                 for (1..600) {
 427                         return if flock(WIKILOCK, 2 | 4);
 428                         sleep 1;
 429                 }
 430                 error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 431         }
 432 } #}}}
 433
 434 sub unlockwiki () { #{{{
 435         close WIKILOCK;
 436 } #}}}
 437
 438 sub loadindex () { #{{{
 439         open (IN, "$config{srcdir}/.ikiwiki/index") || return;
 440         while (<IN>) {
 441                 $_=possibly_foolish_untaint($_);
 442                 chomp;
 443                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 444                 my $page=pagename($file);
 445                 $pagesources{$page}=$file;
 446                 $oldpagemtime{$page}=$mtime;
 447                 $oldlinks{$page}=[@links];
 448                 $links{$page}=[@links];
 449                 $renderedfiles{$page}=$rendered;
 450         }
 451         close IN;
 452 } #}}}
 453
 454 sub saveindex () { #{{{
 455         if (! -d "$config{srcdir}/.ikiwiki") {
 456                 mkdir("$config{srcdir}/.ikiwiki");
 457         }
 458         open (OUT, ">$config{srcdir}/.ikiwiki/index") || error("cannot write to index: $!");
 459         foreach my $page (keys %oldpagemtime) {
 460                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 461                         join(" ", @{$links{$page}})."\n"
 462                                 if $oldpagemtime{$page};
 463         }
 464         close OUT;
 465 } #}}}
 466
 467 sub rcs_update () { #{{{
 468         if (-d "$config{srcdir}/.svn") {
 469                 if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
 470                         warn("svn update failed\n");
 471                 }
 472         }
 473 } #}}}
 474
 475 sub rcs_prepedit ($) { #{{{
 476         # Prepares to edit a file under revision control. Returns a token
 477         # that must be passed into rcs_commit when the file is ready
 478         # for committing.
 479         # The file is relative to the srcdir.
 480         my $file=shift;
 481
 482         if (-d "$config{srcdir}/.svn") {
 483                 # For subversion, return the revision of the file when
 484                 # editing begins.
 485                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 486                 return defined $rev ? $rev : "";
 487         }
 488 } #}}}
 489
 490 sub rcs_commit ($$$) { #{{{
 491         # Tries to commit the page; returns undef on _success_ and
 492         # a version of the page with the rcs's conflict markers on failure.
 493         # The file is relative to the srcdir.
 494         my $file=shift;
 495         my $message=shift;
 496         my $rcstoken=shift;
 497
 498         if (-d "$config{srcdir}/.svn") {
 499                 # Check to see if the page has been changed by someone
 500                 # else since rcs_prepedit was called.
 501                 my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
 502                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 503                 if (defined $rev && defined $oldrev && $rev != $oldrev) {
 504                         # Merge their changes into the file that we've
 505                         # changed.
 506                         chdir($config{srcdir}); # svn merge wants to be here
 507                         if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
 508                                    "$config{srcdir}/$file") != 0) {
 509                                 warn("svn merge -r$oldrev:$rev failed\n");
 510                         }
 511                 }
 512
 513                 if (system("svn", "commit", "--quiet", "-m",
 514                            possibly_foolish_untaint($message),
 515                            "$config{srcdir}") != 0) {
 516                         my $conflict=readfile("$config{srcdir}/$file");
 517                         if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
 518                                 warn("svn revert failed\n");
 519                         }
 520                         return $conflict;
 521                 }
 522         }
 523         return undef # success
 524 } #}}}
 525
 526 sub rcs_add ($) { #{{{
 527         # filename is relative to the root of the srcdir
 528         my $file=shift;
 529
 530         if (-d "$config{srcdir}/.svn") {
 531                 my $parent=dirname($file);
 532                 while (! -d "$config{srcdir}/$parent/.svn") {
 533                         $file=$parent;
 534                         $parent=dirname($file);
 535                 }
 536
 537                 if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
 538                         warn("svn add failed\n");
 539                 }
 540         }
 541 } #}}}
 542
 543 sub svn_info ($$) { #{{{
 544         my $field=shift;
 545         my $file=shift;
 546
 547         my $info=`LANG=C svn info $file`;
 548         my ($ret)=$info=~/^$field: (.*)$/m;
 549         return $ret;
 550 } #}}}
 551
 552 sub rcs_recentchanges ($) { #{{{
 553         my $num=shift;
 554         my @ret;
 555
 556         eval q{use CGI 'escapeHTML'};
 557         eval q{use Date::Parse};
 558         eval q{use Time::Duration};
 559
 560         if (-d "$config{srcdir}/.svn") {
 561                 my $svn_url=svn_info("URL", $config{srcdir});
 562
 563                 # FIXME: currently assumes that the wiki is somewhere
 564                 # under trunk in svn, doesn't support other layouts.
 565                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 566
 567                 my $div=qr/^--------------------+$/;
 568                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 569                 my $state='start';
 570                 my ($rev, $user, $when, @pages, @message);
 571                 foreach (`LANG=C svn log --limit $num -v '$svn_url'`) {
 572                         chomp;
 573                         if ($state eq 'start' && /$div/) {
 574                                 $state='header';
 575                         }
 576                         elsif ($state eq 'header' && /$infoline/) {
 577                                 $rev=$1;
 578                                 $user=$2;
 579                                 $when=concise(ago(time - str2time($3)));
 580                         }
 581                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/([^ ]+)(?:$|\s)/) {
 582                                 my $file=$1;
 583                                 my $diffurl=$config{diffurl};
 584                                 $diffurl=~s/\[\[file\]\]/$file/g;
 585                                 $diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
 586                                 $diffurl=~s/\[\[r2\]\]/$rev/g;
 587                                 push @pages, {
 588                                         link => htmllink("", pagename($file), 1),
 589                                         diffurl => $diffurl,
 590                                 } if length $file;
 591                         }
 592                         elsif ($state eq 'header' && /^$/) {
 593                                 $state='body';
 594                         }
 595                         elsif ($state eq 'body' && /$div/) {
 596                                 my $committype="web";
 597                                 if (defined $message[0] &&
 598                                     $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
 599                                         $user="$1";
 600                                         $message[0]->{line}=$2;
 601                                 }
 602                                 else {
 603                                         $committype="svn";
 604                                 }
 605
 606                                 push @ret, { rev => $rev,
 607                                         user => htmllink("", $user, 1),
 608                                         committype => $committype,
 609                                         when => $when, message => [@message],
 610                                         pages => [@pages],
 611                                 } if @pages;
 612                                 return @ret if @ret >= $num;
 613
 614                                 $state='header';
 615                                 $rev=$user=$when=undef;
 616                                 @pages=@message=();
 617                         }
 618                         elsif ($state eq 'body') {
 619                                 push @message, {line => escapeHTML($_)},
 620                         }
 621                 }
 622         }
 623
 624         return @ret;
 625 } #}}}
 626
 627 sub prune ($) { #{{{
 628         my $file=shift;
 629
 630         unlink($file);
 631         my $dir=dirname($file);
 632         while (rmdir($dir)) {
 633                 $dir=dirname($dir);
 634         }
 635 } #}}}
 636
 637 sub refresh () { #{{{
 638         # find existing pages
 639         my %exists;
 640         my @files;
 641         eval q{use File::Find};
 642         find({
 643                 no_chdir => 1,
 644                 wanted => sub {
 645                         if (/$config{wiki_file_prune_regexp}/) {
 646                                 no warnings 'once';
 647                                 $File::Find::prune=1;
 648                                 use warnings "all";
 649                         }
 650                         elsif (! -d $_ && ! -l $_) {
 651                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 652                                 if (! defined $f) {
 653                                         warn("skipping bad filename $_\n");
 654                                 }
 655                                 else {
 656                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 657                                         push @files, $f;
 658                                         $exists{pagename($f)}=1;
 659                                 }
 660                         }
 661                 },
 662         }, $config{srcdir});
 663
 664         my %rendered;
 665
 666         # check for added or removed pages
 667         my @add;
 668         foreach my $file (@files) {
 669                 my $page=pagename($file);
 670                 if (! $oldpagemtime{$page}) {
 671                         debug("new page $page");
 672                         push @add, $file;
 673                         $links{$page}=[];
 674                         $pagesources{$page}=$file;
 675                 }
 676         }
 677         my @del;
 678         foreach my $page (keys %oldpagemtime) {
 679                 if (! $exists{$page}) {
 680                         debug("removing old page $page");
 681                         push @del, $pagesources{$page};
 682                         prune($config{destdir}."/".$renderedfiles{$page});
 683                         delete $renderedfiles{$page};
 684                         $oldpagemtime{$page}=0;
 685                         delete $pagesources{$page};
 686                 }
 687         }
 688
 689         # render any updated files
 690         foreach my $file (@files) {
 691                 my $page=pagename($file);
 692
 693                 if (! exists $oldpagemtime{$page} ||
 694                     mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 695                         debug("rendering changed file $file");
 696                         render($file);
 697                         $rendered{$file}=1;
 698                 }
 699         }
 700
 701         # if any files were added or removed, check to see if each page
 702         # needs an update due to linking to them
 703         # TODO: inefficient; pages may get rendered above and again here;
 704         # problem is the bestlink may have changed and we won't know until
 705         # now
 706         if (@add || @del) {
 707 FILE:           foreach my $file (@files) {
 708                         my $page=pagename($file);
 709                         foreach my $f (@add, @del) {
 710                                 my $p=pagename($f);
 711                                 foreach my $link (@{$links{$page}}) {
 712                                         if (bestlink($page, $link) eq $p) {
 713                                                 debug("rendering $file, which links to $p");
 714                                                 render($file);
 715                                                 $rendered{$file}=1;
 716                                                 next FILE;
 717                                         }
 718                                 }
 719                         }
 720                 }
 721         }
 722
 723         # handle backlinks; if a page has added/removed links, update the
 724         # pages it links to
 725         # TODO: inefficient; pages may get rendered above and again here;
 726         # problem is the backlinks could be wrong in the first pass render
 727         # above
 728         if (%rendered) {
 729                 my %linkchanged;
 730                 foreach my $file (keys %rendered, @del) {
 731                         my $page=pagename($file);
 732                         if (exists $links{$page}) {
 733                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 734                                         if (length $link &&
 735                                             ! exists $oldlinks{$page} ||
 736                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 737                                                 $linkchanged{$link}=1;
 738                                         }
 739                                 }
 740                         }
 741                         if (exists $oldlinks{$page}) {
 742                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 743                                         if (length $link &&
 744                                             ! exists $links{$page} ||
 745                                             ! grep { $_ eq $link } @{$links{$page}}) {
 746                                                 $linkchanged{$link}=1;
 747                                         }
 748                                 }
 749                         }
 750                 }
 751                 foreach my $link (keys %linkchanged) {
 752                         my $linkfile=$pagesources{$link};
 753                         if (defined $linkfile) {
 754                                 debug("rendering $linkfile, to update its backlinks");
 755                                 render($linkfile);
 756                         }
 757                 }
 758         }
 759 } #}}}
 760
 761 sub gen_wrapper (@) { #{{{
 762         my %config=(@_);
 763         eval q{use Cwd 'abs_path'};
 764         $config{srcdir}=abs_path($config{srcdir});
 765         $config{destdir}=abs_path($config{destdir});
 766         my $this=abs_path($0);
 767         if (! -x $this) {
 768                 error("$this doesn't seem to be executable");
 769         }
 770
 771         if ($config{setup}) {
 772                 error("cannot create a wrapper that uses a setup file");
 773         }
 774
 775         my @params=($config{srcdir}, $config{destdir},
 776                 "--wikiname=$config{wikiname}",
 777                 "--templatedir=$config{templatedir}");
 778         push @params, "--verbose" if $config{verbose};
 779         push @params, "--rebuild" if $config{rebuild};
 780         push @params, "--nosvn" if !$config{svn};
 781         push @params, "--cgi" if $config{cgi};
 782         push @params, "--url=$config{url}" if length $config{url};
 783         push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
 784         push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
 785         push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
 786         push @params, "--anonok" if $config{anonok};
 787         push @params, "--adminuser=$_" foreach @{$config{adminuser}};
 788         my $params=join(" ", @params);
 789         my $call='';
 790         foreach my $p ($this, $this, @params) {
 791                 $call.=qq{"$p", };
 792         }
 793         $call.="NULL";
 794
 795         my @envsave;
 796         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 797                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 798                        HTTP_COOKIE} if $config{cgi};
 799         my $envsave="";
 800         foreach my $var (@envsave) {
 801                 $envsave.=<<"EOF"
 802         if ((s=getenv("$var")))
 803                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 804 EOF
 805         }
 806
 807         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 808         print OUT <<"EOF";
 809 /* A wrapper for ikiwiki, can be safely made suid. */
 810 #define _GNU_SOURCE
 811 #include <stdio.h>
 812 #include <unistd.h>
 813 #include <stdlib.h>
 814 #include <string.h>
 815
 816 extern char **environ;
 817
 818 int main (int argc, char **argv) {
 819         /* Sanitize environment. */
 820         char *s;
 821         char *newenviron[$#envsave+3];
 822         int i=0;
 823 $envsave
 824         newenviron[i++]="HOME=$ENV{HOME}";
 825         newenviron[i]=NULL;
 826         environ=newenviron;
 827
 828         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 829                 printf("$params\\n");
 830                 exit(0);
 831         }
 832
 833         execl($call);
 834         perror("failed to run $this");
 835         exit(1);
 836 }
 837 EOF
 838         close OUT;
 839         if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
 840                 error("failed to compile ikiwiki-wrap.c");
 841         }
 842         unlink("ikiwiki-wrap.c");
 843         if (defined $config{wrappermode} &&
 844             ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
 845                 error("chmod $config{wrapper}: $!");
 846         }
 847         print "successfully generated $config{wrapper}\n";
 848 } #}}}
 849
 850 sub misctemplate ($$) { #{{{
 851         my $title=shift;
 852         my $pagebody=shift;
 853
 854         my $template=HTML::Template->new(
 855                 filename => "$config{templatedir}/misc.tmpl"
 856         );
 857         $template->param(
 858                 title => $title,
 859                 indexlink => indexlink(),
 860                 wikiname => $config{wikiname},
 861                 pagebody => $pagebody,
 862         );
 863         return $template->output;
 864 }#}}}
 865
 866 sub cgi_recentchanges ($) { #{{{
 867         my $q=shift;
 868
 869         my $template=HTML::Template->new(
 870                 filename => "$config{templatedir}/recentchanges.tmpl"
 871         );
 872         $template->param(
 873                 title => "RecentChanges",
 874                 indexlink => indexlink(),
 875                 wikiname => $config{wikiname},
 876                 changelog => [rcs_recentchanges(100)],
 877         );
 878         print $q->header, $template->output;
 879 } #}}}
 880
 881 sub userinfo_get ($$) { #{{{
 882         my $user=shift;
 883         my $field=shift;
 884
 885         eval q{use Storable};
 886         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 887         if (! defined $userdata || ! ref $userdata ||
 888             ! exists $userdata->{$user} || ! ref $userdata->{$user} ||
 889             ! exists $userdata->{$user}->{$field}) {
 890                 return "";
 891         }
 892         return $userdata->{$user}->{$field};
 893 } #}}}
 894
 895 sub userinfo_set ($$$) { #{{{
 896         my $user=shift;
 897         my $field=shift;
 898         my $value=shift;
 899
 900         eval q{use Storable};
 901         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 902         if (! defined $userdata || ! ref $userdata ||
 903             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 904                 return "";
 905         }
 906
 907         $userdata->{$user}->{$field}=$value;
 908         my $oldmask=umask(077);
 909         my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
 910         umask($oldmask);
 911         return $ret;
 912 } #}}}
 913
 914 sub userinfo_setall ($$) { #{{{
 915         my $user=shift;
 916         my $info=shift;
 917
 918         eval q{use Storable};
 919         my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
 920         if (! defined $userdata || ! ref $userdata) {
 921                 $userdata={};
 922         }
 923         $userdata->{$user}=$info;
 924         my $oldmask=umask(077);
 925         my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
 926         umask($oldmask);
 927         return $ret;
 928 } #}}}
 929
 930 sub cgi_signin ($$) { #{{{
 931         my $q=shift;
 932         my $session=shift;
 933
 934         eval q{use CGI::FormBuilder};
 935         my $form = CGI::FormBuilder->new(
 936                 title => "signin",
 937                 fields => [qw(do page from name password confirm_password email)],
 938                 header => 1,
 939                 method => 'POST',
 940                 validate => {
 941                         confirm_password => {
 942                                 perl => q{eq $form->field("password")},
 943                         },
 944                         email => 'EMAIL',
 945                 },
 946                 required => 'NONE',
 947                 javascript => 0,
 948                 params => $q,
 949                 action => $q->request_uri,
 950                 header => 0,
 951                 template => (-e "$config{templatedir}/signin.tmpl" ?
 952                               "$config{templatedir}/signin.tmpl" : "")
 953         );
 954
 955         $form->field(name => "name", required => 0);
 956         $form->field(name => "do", type => "hidden");
 957         $form->field(name => "page", type => "hidden");
 958         $form->field(name => "from", type => "hidden");
 959         $form->field(name => "password", type => "password", required => 0);
 960         $form->field(name => "confirm_password", type => "password", required => 0);
 961         $form->field(name => "email", required => 0);
 962         if ($q->param("do") ne "signin") {
 963                 $form->text("You need to log in first.");
 964         }
 965
 966         if ($form->submitted) {
 967                 # Set required fields based on how form was submitted.
 968                 my %required=(
 969                         "Login" => [qw(name password)],
 970                         "Register" => [qw(name password confirm_password email)],
 971                         "Mail Password" => [qw(name)],
 972                 );
 973                 foreach my $opt (@{$required{$form->submitted}}) {
 974                         $form->field(name => $opt, required => 1);
 975                 }
 976
 977                 # Validate password differently depending on how
 978                 # form was submitted.
 979                 if ($form->submitted eq 'Login') {
 980                         $form->field(
 981                                 name => "password",
 982                                 validate => sub {
 983                                         length $form->field("name") &&
 984                                         shift eq userinfo_get($form->field("name"), 'password');
 985                                 },
 986                         );
 987                         $form->field(name => "name", validate => '/^\w+$/');
 988                 }
 989                 else {
 990                         $form->field(name => "password", validate => 'VALUE');
 991                 }
 992                 # And make sure the entered name exists when logging
 993                 # in or sending email, and does not when registering.
 994                 if ($form->submitted eq 'Register') {
 995                         $form->field(
 996                                 name => "name",
 997                                 validate => sub {
 998                                         my $name=shift;
 999                                         length $name &&
1000                                         ! userinfo_get($name, "regdate");
1001                                 },
1002                         );
1003                 }
1004                 else {
1005                         $form->field(
1006                                 name => "name",
1007                                 validate => sub {
1008                                         my $name=shift;
1009                                         length $name &&
1010                                         userinfo_get($name, "regdate");
1011                                 },
1012                         );
1013                 }
1014         }
1015         else {
1016                 # First time settings.
1017                 $form->field(name => "name", comment => "use FirstnameLastName");
1018                 $form->field(name => "confirm_password", comment => "(only needed");
1019                 $form->field(name => "email",            comment => "for registration)");
1020                 if ($session->param("name")) {
1021                         $form->field(name => "name", value => $session->param("name"));
1022                 }
1023         }
1024
1025         if ($form->submitted && $form->validate) {
1026                 if ($form->submitted eq 'Login') {
1027                         $session->param("name", $form->field("name"));
1028                         if (defined $form->field("do") &&
1029                             $form->field("do") ne 'signin') {
1030                                 print $q->redirect(
1031                                         "$config{cgiurl}?do=".$form->field("do").
1032                                         "&page=".$form->field("page").
1033                                         "&from=".$form->field("from"));;
1034                         }
1035                         else {
1036                                 print $q->redirect($config{url});
1037                         }
1038                 }
1039                 elsif ($form->submitted eq 'Register') {
1040                         my $user_name=$form->field('name');
1041                         if (userinfo_setall($user_name, {
1042                                            'email' => $form->field('email'),
1043                                            'password' => $form->field('password'),
1044                                            'regdate' => time
1045                                          })) {
1046                                 $form->field(name => "confirm_password", type => "hidden");
1047                                 $form->field(name => "email", type => "hidden");
1048                                 $form->text("Registration successful. Now you can Login.");
1049                                 print $session->header();
1050                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
1051                         }
1052                         else {
1053                                 error("Error saving registration.");
1054                         }
1055                 }
1056                 elsif ($form->submitted eq 'Mail Password') {
1057                         my $user_name=$form->field("name");
1058                         my $template=HTML::Template->new(
1059                                 filename => "$config{templatedir}/passwordmail.tmpl"
1060                         );
1061                         $template->param(
1062                                 user_name => $user_name,
1063                                 user_password => userinfo_get($user_name, "password"),
1064                                 wikiurl => $config{url},
1065                                 wikiname => $config{wikiname},
1066                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
1067                         );
1068
1069                         eval q{use Mail::Sendmail};
1070                         my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
1071                         sendmail(
1072                                 To => userinfo_get($user_name, "email"),
1073                                 From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
1074                                 Subject => "$config{wikiname} information",
1075                                 Message => $template->output,
1076                         ) or error("Failed to send mail");
1077
1078                         $form->text("Your password has been emailed to you.");
1079                         $form->field(name => "name", required => 0);
1080                         print $session->header();
1081                         print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1082                 }
1083         }
1084         else {
1085                 print $session->header();
1086                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1087         }
1088 } #}}}
1089
1090 sub is_admin ($) { #{{{
1091         my $user_name=shift;
1092
1093         return grep { $_ eq $user_name } @{$config{adminuser}};
1094 } #}}}
1095
1096 sub glob_match ($$) { #{{{
1097         my $page=shift;
1098         my $glob=shift;
1099
1100         # turn glob into safe regexp
1101         $glob=quotemeta($glob);
1102         $glob=~s/\\\*/.*/g;
1103         $glob=~s/\\\?/./g;
1104         $glob=~s!\\/!/!g;
1105
1106         $page=~/^$glob$/i;
1107 } #}}}
1108
1109 sub globlist_match ($$) { #{{{
1110         my $page=shift;
1111         my @globlist=split(" ", shift);
1112
1113         # check any negated globs first
1114         foreach my $glob (@globlist) {
1115                 return 0 if $glob=~/^!(.*)/ && glob_match($page, $1);
1116         }
1117
1118         foreach my $glob (@globlist) {
1119                 return 1 if glob_match($page, $glob);
1120         }
1121
1122         return 0;
1123 } #}}}
1124
1125 sub page_locked ($$;$) { #{{{
1126         my $page=shift;
1127         my $session=shift;
1128         my $nonfatal=shift;
1129
1130         my $user=$session->param("name");
1131         return if length $user && is_admin($user);
1132
1133         foreach my $admin (@{$config{adminuser}}) {
1134                 my $locked_pages=userinfo_get($admin, "locked_pages");
1135                 if (globlist_match($page, userinfo_get($admin, "locked_pages"))) {
1136                         return 1 if $nonfatal;
1137                         error(htmllink("", $page, 1)." is locked by ".
1138                               htmllink("", $admin, 1)." and cannot be edited.");
1139                 }
1140         }
1141
1142         return 0;
1143 } #}}}
1144
1145 sub cgi_prefs ($$) { #{{{
1146         my $q=shift;
1147         my $session=shift;
1148
1149         eval q{use CGI::FormBuilder};
1150         my $form = CGI::FormBuilder->new(
1151                 title => "preferences",
1152                 fields => [qw(do name password confirm_password email locked_pages)],
1153                 header => 0,
1154                 method => 'POST',
1155                 validate => {
1156                         confirm_password => {
1157                                 perl => q{eq $form->field("password")},
1158                         },
1159                         email => 'EMAIL',
1160                 },
1161                 required => 'NONE',
1162                 javascript => 0,
1163                 params => $q,
1164                 action => $q->request_uri,
1165                 template => (-e "$config{templatedir}/prefs.tmpl" ?
1166                               "$config{templatedir}/prefs.tmpl" : "")
1167         );
1168         my @buttons=("Save Preferences", "Logout", "Cancel");
1169
1170         my $user_name=$session->param("name");
1171         $form->field(name => "do", type => "hidden");
1172         $form->field(name => "name", disabled => 1,
1173                 value => $user_name, force => 1);
1174         $form->field(name => "password", type => "password");
1175         $form->field(name => "confirm_password", type => "password");
1176         $form->field(name => "locked_pages", size => 50,
1177                 comment => "(".htmllink("", "GlobList", 1).")");
1178
1179         if (! is_admin($user_name)) {
1180                 $form->field(name => "locked_pages", type => "hidden");
1181         }
1182
1183         if (! $form->submitted) {
1184                 $form->field(name => "email", force => 1,
1185                         value => userinfo_get($user_name, "email"));
1186                 $form->field(name => "locked_pages", force => 1,
1187                         value => userinfo_get($user_name, "locked_pages"));
1188         }
1189
1190         if ($form->submitted eq 'Logout') {
1191                 $session->delete();
1192                 print $q->redirect($config{url});
1193                 return;
1194         }
1195         elsif ($form->submitted eq 'Cancel') {
1196                 print $q->redirect($config{url});
1197                 return;
1198         }
1199         elsif ($form->submitted eq "Save Preferences" && $form->validate) {
1200                 foreach my $field (qw(password email locked_pages)) {
1201                         if (length $form->field($field)) {
1202                                 userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
1203                         }
1204                 }
1205                 $form->text("Preferences saved.");
1206         }
1207
1208         print $session->header();
1209         print misctemplate($form->title, $form->render(submit => \@buttons));
1210 } #}}}
1211
1212 sub cgi_editpage ($$) { #{{{
1213         my $q=shift;
1214         my $session=shift;
1215
1216         eval q{use CGI::FormBuilder};
1217         my $form = CGI::FormBuilder->new(
1218                 fields => [qw(do rcsinfo from page content comments)],
1219                 header => 1,
1220                 method => 'POST',
1221                 validate => {
1222                         content => '/.+/',
1223                 },
1224                 required => [qw{content}],
1225                 javascript => 0,
1226                 params => $q,
1227                 action => $q->request_uri,
1228                 table => 0,
1229                 template => "$config{templatedir}/editpage.tmpl"
1230         );
1231         my @buttons=("Save Page", "Preview", "Cancel");
1232
1233         my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
1234         if (! defined $page || ! length $page || $page ne $q->param('page') ||
1235             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
1236                 error("bad page name");
1237         }
1238         $page=lc($page);
1239
1240         my $file=$page.$config{default_pageext};
1241         my $newfile=1;
1242         if (exists $pagesources{lc($page)}) {
1243                 $file=$pagesources{lc($page)};
1244                 $newfile=0;
1245         }
1246
1247         $form->field(name => "do", type => 'hidden');
1248         $form->field(name => "from", type => 'hidden');
1249         $form->field(name => "rcsinfo", type => 'hidden');
1250         $form->field(name => "page", value => "$page", force => 1);
1251         $form->field(name => "comments", type => "text", size => 80);
1252         $form->field(name => "content", type => "textarea", rows => 20,
1253                 cols => 80);
1254         $form->tmpl_param("can_commit", $config{svn});
1255         $form->tmpl_param("indexlink", indexlink());
1256         $form->tmpl_param("helponformattinglink",
1257                 htmllink("", "HelpOnFormatting", 1));
1258         if (! $form->submitted) {
1259                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1260                         force => 1);
1261         }
1262
1263         if ($form->submitted eq "Cancel") {
1264                 print $q->redirect("$config{url}/".htmlpage($page));
1265                 return;
1266         }
1267         elsif ($form->submitted eq "Preview") {
1268                 $form->tmpl_param("page_preview",
1269                         htmlize($config{default_pageext},
1270                                 linkify($form->field('content'), $page)));
1271         }
1272         else {
1273                 $form->tmpl_param("page_preview", "");
1274         }
1275         $form->tmpl_param("page_conflict", "");
1276
1277         if (! $form->submitted || $form->submitted eq "Preview" ||
1278             ! $form->validate) {
1279                 if ($form->field("do") eq "create") {
1280                         if (exists $pagesources{lc($page)}) {
1281                                 # hmm, someone else made the page in the
1282                                 # meantime?
1283                                 print $q->redirect("$config{url}/".htmlpage($page));
1284                                 return;
1285                         }
1286
1287                         my @page_locs;
1288                         my $best_loc;
1289                         my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
1290                         if (! defined $from || ! length $from ||
1291                             $from ne $form->param('from') ||
1292                             $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
1293                                 @page_locs=$best_loc=$page;
1294                         }
1295                         else {
1296                                 my $dir=$from."/";
1297                                 $dir=~s![^/]+/$!!;
1298
1299                                 if ($page eq 'discussion') {
1300                                         $best_loc="$from/$page";
1301                                 }
1302                                 else {
1303                                         $best_loc=$dir.$page;
1304                                 }
1305
1306                                 push @page_locs, $dir.$page;
1307                                 push @page_locs, "$from/$page";
1308                                 while (length $dir) {
1309                                         $dir=~s![^/]+/$!!;
1310                                         push @page_locs, $dir.$page;
1311                                 }
1312
1313                                 @page_locs = grep {
1314                                         ! exists $pagesources{lc($_)} &&
1315                                         ! page_locked($_, $session, 1)
1316                                 } @page_locs;
1317                         }
1318
1319                         $form->tmpl_param("page_select", 1);
1320                         $form->field(name => "page", type => 'select',
1321                                 options => \@page_locs, value => $best_loc);
1322                         $form->title("creating $page");
1323                 }
1324                 elsif ($form->field("do") eq "edit") {
1325                         page_locked($page, $session);
1326                         if (! defined $form->field('content') ||
1327                             ! length $form->field('content')) {
1328                                 my $content="";
1329                                 if (exists $pagesources{lc($page)}) {
1330                                                 $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
1331                                         $content=~s/\n/\r\n/g;
1332                                 }
1333                                 $form->field(name => "content", value => $content,
1334                                         force => 1);
1335                         }
1336                         $form->tmpl_param("page_select", 0);
1337                         $form->field(name => "page", type => 'hidden');
1338                         $form->title("editing $page");
1339                 }
1340
1341                 print $form->render(submit => \@buttons);
1342         }
1343         else {
1344                 # save page
1345                 page_locked($page, $session);
1346
1347                 my $content=$form->field('content');
1348                 $content=~s/\r\n/\n/g;
1349                 $content=~s/\r/\n/g;
1350                 writefile("$config{srcdir}/$file", $content);
1351
1352                 my $message="web commit ";
1353                 if (length $session->param("name")) {
1354                         $message.="by ".$session->param("name");
1355                 }
1356                 else {
1357                         $message.="from $ENV{REMOTE_ADDR}";
1358                 }
1359                 if (defined $form->field('comments') &&
1360                     length $form->field('comments')) {
1361                         $message.=": ".$form->field('comments');
1362                 }
1363
1364                 if ($config{svn}) {
1365                         if ($newfile) {
1366                                 rcs_add($file);
1367                         }
1368                         # prevent deadlock with post-commit hook
1369                         unlockwiki();
1370                         # presumably the commit will trigger an update
1371                         # of the wiki
1372                         my $conflict=rcs_commit($file, $message,
1373                                 $form->field("rcsinfo"));
1374
1375                         if (defined $conflict) {
1376                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1377                                         force => 1);
1378                                 $form->tmpl_param("page_conflict", 1);
1379                                 $form->field("content", value => $conflict, force => 1);
1380                                 $form->field("do", "edit)");
1381                                 $form->tmpl_param("page_select", 0);
1382                                 $form->field(name => "page", type => 'hidden');
1383                                 $form->title("editing $page");
1384                                 print $form->render(submit => \@buttons);
1385                                 return;
1386                         }
1387                 }
1388                 else {
1389                         loadindex();
1390                         refresh();
1391                         saveindex();
1392                 }
1393
1394                 # The trailing question mark tries to avoid broken
1395                 # caches and get the most recent version of the page.
1396                 print $q->redirect("$config{url}/".htmlpage($page)."?updated");
1397         }
1398 } #}}}
1399
1400 sub cgi () { #{{{
1401         eval q{use CGI};
1402         eval q{use CGI::Session};
1403
1404         my $q=CGI->new;
1405
1406         my $do=$q->param('do');
1407         if (! defined $do || ! length $do) {
1408                 error("\"do\" parameter missing");
1409         }
1410
1411         # This does not need a session.
1412         if ($do eq 'recentchanges') {
1413                 cgi_recentchanges($q);
1414                 return;
1415         }
1416
1417         CGI::Session->name("ikiwiki_session");
1418
1419         my $oldmask=umask(077);
1420         my $session = CGI::Session->new("driver:db_file", $q,
1421                 { FileName => "$config{srcdir}/.ikiwiki/sessions.db" });
1422         umask($oldmask);
1423
1424         # Everything below this point needs the user to be signed in.
1425         if ((! $config{anonok} && ! defined $session->param("name") ||
1426              ! defined $session->param("name") ||
1427              ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
1428                 cgi_signin($q, $session);
1429
1430                 # Force session flush with safe umask.
1431                 my $oldmask=umask(077);
1432                 $session->flush;
1433                 umask($oldmask);
1434
1435                 return;
1436         }
1437
1438         if ($do eq 'create' || $do eq 'edit') {
1439                 cgi_editpage($q, $session);
1440         }
1441         elsif ($do eq 'prefs') {
1442                 cgi_prefs($q, $session);
1443         }
1444         else {
1445                 error("unknown do parameter");
1446         }
1447 } #}}}
1448
1449 sub setup () { # {{{
1450         my $setup=possibly_foolish_untaint($config{setup});
1451         delete $config{setup};
1452         open (IN, $setup) || error("read $setup: $!\n");
1453         local $/=undef;
1454         my $code=<IN>;
1455         ($code)=$code=~/(.*)/s;
1456         close IN;
1457
1458         eval $code;
1459         error($@) if $@;
1460         exit;
1461 } #}}}
1462
1463 # main {{{
1464 setup() if $config{setup};
1465 lockwiki();
1466 if ($config{wrapper}) {
1467         gen_wrapper(%config);
1468         exit;
1469 }
1470 memoize('pagename');
1471 memoize('bestlink');
1472 loadindex() unless $config{rebuild};
1473 if ($config{cgi}) {
1474         cgi();
1475 }
1476 else {
1477         rcs_update() if $config{svn};
1478         refresh();
1479         saveindex();
1480 }
1481 #}}}