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=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         $config{destdir} = possibly_foolish_untaint(shift);
  66         checkoptions();
  67 }
  68 #}}}
  69
  70 sub checkoptions { #{{{
  71         if ($config{cgi} && ! length $config{url}) {
  72                 error("Must specify url to wiki with --url when using --cgi");
  73         }
  74         $config{wikistatedir}="$config{srcdir}/.ikiwiki"
  75                 unless exists $config{wikistatedir};
  76 } #}}}
  77
  78 sub usage { #{{{
  79         die "usage: ikiwiki [options] source dest\n";
  80 } #}}}
  81
  82 sub error { #{{{
  83         if ($config{cgi}) {
  84                 print "Content-type: text/html\n\n";
  85                 print misctemplate("Error", "<p>Error: @_</p>");
  86         }
  87         die @_;
  88 } #}}}
  89
  90 sub debug ($) { #{{{
  91         return unless $config{verbose};
  92         if (! $config{cgi}) {
  93                 print "@_\n";
  94         }
  95         else {
  96                 print STDERR "@_\n";
  97         }
  98 } #}}}
  99
 100 sub mtime ($) { #{{{
 101         my $page=shift;
 102
 103         return (stat($page))[9];
 104 } #}}}
 105
 106 sub possibly_foolish_untaint { #{{{
 107         my $tainted=shift;
 108         my ($untainted)=$tainted=~/(.*)/;
 109         return $untainted;
 110 } #}}}
 111
 112 sub basename ($) { #{{{
 113         my $file=shift;
 114
 115         $file=~s!.*/!!;
 116         return $file;
 117 } #}}}
 118
 119 sub dirname ($) { #{{{
 120         my $file=shift;
 121
 122         $file=~s!/?[^/]+$!!;
 123         return $file;
 124 } #}}}
 125
 126 sub pagetype ($) { #{{{
 127         my $page=shift;
 128
 129         if ($page =~ /\.mdwn$/) {
 130                 return ".mdwn";
 131         }
 132         else {
 133                 return "unknown";
 134         }
 135 } #}}}
 136
 137 sub pagename ($) { #{{{
 138         my $file=shift;
 139
 140         my $type=pagetype($file);
 141         my $page=$file;
 142         $page=~s/\Q$type\E*$// unless $type eq 'unknown';
 143         return $page;
 144 } #}}}
 145
 146 sub htmlpage ($) { #{{{
 147         my $page=shift;
 148
 149         return $page.".html";
 150 } #}}}
 151
 152 sub readfile ($) { #{{{
 153         my $file=shift;
 154
 155         local $/=undef;
 156         open (IN, "$file") || error("failed to read $file: $!");
 157         my $ret=<IN>;
 158         close IN;
 159         return $ret;
 160 } #}}}
 161
 162 sub writefile ($$) { #{{{
 163         my $file=shift;
 164         my $content=shift;
 165
 166         my $dir=dirname($file);
 167         if (! -d $dir) {
 168                 my $d="";
 169                 foreach my $s (split(m!/+!, $dir)) {
 170                         $d.="$s/";
 171                         if (! -d $d) {
 172                                 mkdir($d) || error("failed to create directory $d: $!");
 173                         }
 174                 }
 175         }
 176
 177         open (OUT, ">$file") || error("failed to write $file: $!");
 178         print OUT $content;
 179         close OUT;
 180 } #}}}
 181
 182 sub findlinks ($$) { #{{{
 183         my $content=shift;
 184         my $page=shift;
 185
 186         my @links;
 187         while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 188                 push @links, lc($1);
 189         }
 190         # Discussion links are a special case since they're not in the text
 191         # of the page, but on its template.
 192         return @links, "$page/discussion";
 193 } #}}}
 194
 195 sub bestlink ($$) { #{{{
 196         # Given a page and the text of a link on the page, determine which
 197         # existing page that link best points to. Prefers pages under a
 198         # subdirectory with the same name as the source page, failing that
 199         # goes down the directory tree to the base looking for matching
 200         # pages.
 201         my $page=shift;
 202         my $link=lc(shift);
 203
 204         my $cwd=$page;
 205         do {
 206                 my $l=$cwd;
 207                 $l.="/" if length $l;
 208                 $l.=$link;
 209
 210                 if (exists $links{$l}) {
 211                         #debug("for $page, \"$link\", use $l");
 212                         return $l;
 213                 }
 214         } while $cwd=~s!/?[^/]+$!!;
 215
 216         #print STDERR "warning: page $page, broken link: $link\n";
 217         return "";
 218 } #}}}
 219
 220 sub isinlinableimage ($) { #{{{
 221         my $file=shift;
 222
 223         $file=~/\.(png|gif|jpg|jpeg)$/;
 224 } #}}}
 225
 226 sub htmllink { #{{{
 227         my $page=shift;
 228         my $link=shift;
 229         my $noimageinline=shift; # don't turn links into inline html images
 230         my $forcesubpage=shift; # force a link to a subpage
 231
 232         my $bestlink;
 233         if (! $forcesubpage) {
 234                 $bestlink=bestlink($page, $link);
 235         }
 236         else {
 237                 $bestlink="$page/".lc($link);
 238         }
 239
 240         return $link if length $bestlink && $page eq $bestlink;
 241
 242         # TODO BUG: %renderedfiles may not have it, if the linked to page
 243         # was also added and isn't yet rendered! Note that this bug is
 244         # masked by the bug mentioned below that makes all new files
 245         # be rendered twice.
 246         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 247                 $bestlink=htmlpage($bestlink);
 248         }
 249         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 250                 return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
 251         }
 252
 253         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 254
 255         if (! $noimageinline && isinlinableimage($bestlink)) {
 256                 return "<img src=\"$bestlink\">";
 257         }
 258         return "<a href=\"$bestlink\">$link</a>";
 259 } #}}}
 260
 261 sub linkify ($$) { #{{{
 262         my $content=shift;
 263         my $page=shift;
 264
 265         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 266                 $1 ? "[[$2]]" : htmllink($page, $2)
 267         }eg;
 268
 269         return $content;
 270 } #}}}
 271
 272 sub htmlize ($$) { #{{{
 273         my $type=shift;
 274         my $content=shift;
 275
 276         if (! $INC{"/usr/bin/markdown"}) {
 277                 no warnings 'once';
 278                 $blosxom::version="is a proper perl module too much to ask?";
 279                 use warnings 'all';
 280                 do "/usr/bin/markdown";
 281         }
 282
 283         if ($type eq '.mdwn') {
 284                 return Markdown::Markdown($content);
 285         }
 286         else {
 287                 error("htmlization of $type not supported");
 288         }
 289 } #}}}
 290
 291 sub backlinks ($) { #{{{
 292         my $page=shift;
 293
 294         my @links;
 295         foreach my $p (keys %links) {
 296                 next if bestlink($page, $p) eq $page;
 297                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 298                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 299
 300                         # Trim common dir prefixes from both pages.
 301                         my $p_trimmed=$p;
 302                         my $page_trimmed=$page;
 303                         my $dir;
 304                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 305                                 defined $dir &&
 306                                 $p_trimmed=~s/^\Q$dir\E// &&
 307                                 $page_trimmed=~s/^\Q$dir\E//;
 308
 309                         push @links, { url => $href, page => $p_trimmed };
 310                 }
 311         }
 312
 313         return sort { $a->{page} cmp $b->{page} } @links;
 314 } #}}}
 315
 316 sub parentlinks ($) { #{{{
 317         my $page=shift;
 318
 319         my @ret;
 320         my $pagelink="";
 321         my $path="";
 322         my $skip=1;
 323         foreach my $dir (reverse split("/", $page)) {
 324                 if (! $skip) {
 325                         $path.="../";
 326                         unshift @ret, { url => "$path$dir.html", page => $dir };
 327                 }
 328                 else {
 329                         $skip=0;
 330                 }
 331         }
 332         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
 333         return @ret;
 334 } #}}}
 335
 336 sub indexlink () { #{{{
 337         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 338 } #}}}
 339
 340 sub finalize ($$$) { #{{{
 341         my $content=shift;
 342         my $page=shift;
 343         my $mtime=shift;
 344
 345         my $title=basename($page);
 346         $title=~s/_/ /g;
 347
 348         my $template=HTML::Template->new(blind_cache => 1,
 349                 filename => "$config{templatedir}/page.tmpl");
 350
 351         if (length $config{cgiurl}) {
 352                 $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
 353                 $template->param(prefsurl => "$config{cgiurl}?do=prefs");
 354                 if ($config{svn}) {
 355                         $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
 356                 }
 357         }
 358
 359         if (length $config{historyurl}) {
 360                 my $u=$config{historyurl};
 361                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
 362                 $template->param(historyurl => $u);
 363         }
 364
 365         $template->param(
 366                 title => $title,
 367                 wikiname => $config{wikiname},
 368                 parentlinks => [parentlinks($page)],
 369                 content => $content,
 370                 backlinks => [backlinks($page)],
 371                 discussionlink => htmllink($page, "Discussion", 1, 1),
 372                 mtime => scalar(gmtime($mtime)),
 373         );
 374
 375         return $template->output;
 376 } #}}}
 377
 378 sub check_overwrite ($$) { #{{{
 379         # Important security check. Make sure to call this before saving
 380         # any files to the source directory.
 381         my $dest=shift;
 382         my $src=shift;
 383
 384         if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
 385                 error("$dest already exists and was rendered from ".
 386                         join(" ",(grep { $renderedfiles{$_} eq $dest } keys
 387                                 %renderedfiles)).
 388                         ", before, so not rendering from $src");
 389         }
 390 } #}}}
 391
 392 sub render ($) { #{{{
 393         my $file=shift;
 394
 395         my $type=pagetype($file);
 396         my $content=readfile("$config{srcdir}/$file");
 397         if ($type ne 'unknown') {
 398                 my $page=pagename($file);
 399
 400                 $links{$page}=[findlinks($content, $page)];
 401
 402                 $content=linkify($content, $page);
 403                 $content=htmlize($type, $content);
 404                 $content=finalize($content, $page,
 405                         mtime("$config{srcdir}/$file"));
 406
 407                 check_overwrite("$config{destdir}/".htmlpage($page), $page);
 408                 writefile("$config{destdir}/".htmlpage($page), $content);
 409                 $oldpagemtime{$page}=time;
 410                 $renderedfiles{$page}=htmlpage($page);
 411         }
 412         else {
 413                 $links{$file}=[];
 414                 check_overwrite("$config{destdir}/$file", $file);
 415                 writefile("$config{destdir}/$file", $content);
 416                 $oldpagemtime{$file}=time;
 417                 $renderedfiles{$file}=$file;
 418         }
 419 } #}}}
 420
 421 sub lockwiki () { #{{{
 422         # Take an exclusive lock on the wiki to prevent multiple concurrent
 423         # run issues. The lock will be dropped on program exit.
 424         if (! -d $config{wikistatedir}) {
 425                 mkdir($config{wikistatedir});
 426         }
 427         open(WIKILOCK, ">$config{wikistatedir}/lockfile") ||
 428                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
 429         if (! flock(WIKILOCK, 2 | 4)) {
 430                 debug("wiki seems to be locked, waiting for lock");
 431                 my $wait=600; # arbitrary, but don't hang forever to
 432                               # prevent process pileup
 433                 for (1..600) {
 434                         return if flock(WIKILOCK, 2 | 4);
 435                         sleep 1;
 436                 }
 437                 error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 438         }
 439 } #}}}
 440
 441 sub unlockwiki () { #{{{
 442         close WIKILOCK;
 443 } #}}}
 444
 445 sub loadindex () { #{{{
 446         open (IN, "$config{wikistatedir}/index") || return;
 447         while (<IN>) {
 448                 $_=possibly_foolish_untaint($_);
 449                 chomp;
 450                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 451                 my $page=pagename($file);
 452                 $pagesources{$page}=$file;
 453                 $oldpagemtime{$page}=$mtime;
 454                 $oldlinks{$page}=[@links];
 455                 $links{$page}=[@links];
 456                 $renderedfiles{$page}=$rendered;
 457         }
 458         close IN;
 459 } #}}}
 460
 461 sub saveindex () { #{{{
 462         if (! -d $config{wikistatedir}) {
 463                 mkdir($config{wikistatedir});
 464         }
 465         open (OUT, ">$config{wikistatedir}/index") ||
 466                 error("cannot write to $config{wikistatedir}/index: $!");
 467         foreach my $page (keys %oldpagemtime) {
 468                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 469                         join(" ", @{$links{$page}})."\n"
 470                                 if $oldpagemtime{$page};
 471         }
 472         close OUT;
 473 } #}}}
 474
 475 sub rcs_update () { #{{{
 476         if (-d "$config{srcdir}/.svn") {
 477                 if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
 478                         warn("svn update failed\n");
 479                 }
 480         }
 481 } #}}}
 482
 483 sub rcs_prepedit ($) { #{{{
 484         # Prepares to edit a file under revision control. Returns a token
 485         # that must be passed into rcs_commit when the file is ready
 486         # for committing.
 487         # The file is relative to the srcdir.
 488         my $file=shift;
 489
 490         if (-d "$config{srcdir}/.svn") {
 491                 # For subversion, return the revision of the file when
 492                 # editing begins.
 493                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 494                 return defined $rev ? $rev : "";
 495         }
 496 } #}}}
 497
 498 sub rcs_commit ($$$) { #{{{
 499         # Tries to commit the page; returns undef on _success_ and
 500         # a version of the page with the rcs's conflict markers on failure.
 501         # The file is relative to the srcdir.
 502         my $file=shift;
 503         my $message=shift;
 504         my $rcstoken=shift;
 505
 506         if (-d "$config{srcdir}/.svn") {
 507                 # Check to see if the page has been changed by someone
 508                 # else since rcs_prepedit was called.
 509                 my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
 510                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 511                 if (defined $rev && defined $oldrev && $rev != $oldrev) {
 512                         # Merge their changes into the file that we've
 513                         # changed.
 514                         chdir($config{srcdir}); # svn merge wants to be here
 515                         if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
 516                                    "$config{srcdir}/$file") != 0) {
 517                                 warn("svn merge -r$oldrev:$rev failed\n");
 518                         }
 519                 }
 520
 521                 if (system("svn", "commit", "--quiet", "-m",
 522                            possibly_foolish_untaint($message),
 523                            "$config{srcdir}") != 0) {
 524                         my $conflict=readfile("$config{srcdir}/$file");
 525                         if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
 526                                 warn("svn revert failed\n");
 527                         }
 528                         return $conflict;
 529                 }
 530         }
 531         return undef # success
 532 } #}}}
 533
 534 sub rcs_add ($) { #{{{
 535         # filename is relative to the root of the srcdir
 536         my $file=shift;
 537
 538         if (-d "$config{srcdir}/.svn") {
 539                 my $parent=dirname($file);
 540                 while (! -d "$config{srcdir}/$parent/.svn") {
 541                         $file=$parent;
 542                         $parent=dirname($file);
 543                 }
 544
 545                 if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
 546                         warn("svn add failed\n");
 547                 }
 548         }
 549 } #}}}
 550
 551 sub svn_info ($$) { #{{{
 552         my $field=shift;
 553         my $file=shift;
 554
 555         my $info=`LANG=C svn info $file`;
 556         my ($ret)=$info=~/^$field: (.*)$/m;
 557         return $ret;
 558 } #}}}
 559
 560 sub rcs_recentchanges ($) { #{{{
 561         my $num=shift;
 562         my @ret;
 563
 564         eval q{use CGI 'escapeHTML'};
 565         eval q{use Date::Parse};
 566         eval q{use Time::Duration};
 567
 568         if (-d "$config{srcdir}/.svn") {
 569                 my $svn_url=svn_info("URL", $config{srcdir});
 570
 571                 # FIXME: currently assumes that the wiki is somewhere
 572                 # under trunk in svn, doesn't support other layouts.
 573                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 574
 575                 my $div=qr/^--------------------+$/;
 576                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 577                 my $state='start';
 578                 my ($rev, $user, $when, @pages, @message);
 579                 foreach (`LANG=C svn log --limit $num -v '$svn_url'`) {
 580                         chomp;
 581                         if ($state eq 'start' && /$div/) {
 582                                 $state='header';
 583                         }
 584                         elsif ($state eq 'header' && /$infoline/) {
 585                                 $rev=$1;
 586                                 $user=$2;
 587                                 $when=concise(ago(time - str2time($3)));
 588                         }
 589                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/([^ ]+)(?:$|\s)/) {
 590                                 my $file=$1;
 591                                 my $diffurl=$config{diffurl};
 592                                 $diffurl=~s/\[\[file\]\]/$file/g;
 593                                 $diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
 594                                 $diffurl=~s/\[\[r2\]\]/$rev/g;
 595                                 push @pages, {
 596                                         link => htmllink("", pagename($file), 1),
 597                                         diffurl => $diffurl,
 598                                 } if length $file;
 599                         }
 600                         elsif ($state eq 'header' && /^$/) {
 601                                 $state='body';
 602                         }
 603                         elsif ($state eq 'body' && /$div/) {
 604                                 my $committype="web";
 605                                 if (defined $message[0] &&
 606                                     $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
 607                                         $user="$1";
 608                                         $message[0]->{line}=$2;
 609                                 }
 610                                 else {
 611                                         $committype="svn";
 612                                 }
 613
 614                                 push @ret, { rev => $rev,
 615                                         user => htmllink("", $user, 1),
 616                                         committype => $committype,
 617                                         when => $when, message => [@message],
 618                                         pages => [@pages],
 619                                 } if @pages;
 620                                 return @ret if @ret >= $num;
 621
 622                                 $state='header';
 623                                 $rev=$user=$when=undef;
 624                                 @pages=@message=();
 625                         }
 626                         elsif ($state eq 'body') {
 627                                 push @message, {line => escapeHTML($_)},
 628                         }
 629                 }
 630         }
 631
 632         return @ret;
 633 } #}}}
 634
 635 sub prune ($) { #{{{
 636         my $file=shift;
 637
 638         unlink($file);
 639         my $dir=dirname($file);
 640         while (rmdir($dir)) {
 641                 $dir=dirname($dir);
 642         }
 643 } #}}}
 644
 645 sub refresh () { #{{{
 646         # find existing pages
 647         my %exists;
 648         my @files;
 649         eval q{use File::Find};
 650         find({
 651                 no_chdir => 1,
 652                 wanted => sub {
 653                         if (/$config{wiki_file_prune_regexp}/) {
 654                                 no warnings 'once';
 655                                 $File::Find::prune=1;
 656                                 use warnings "all";
 657                         }
 658                         elsif (! -d $_ && ! -l $_) {
 659                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 660                                 if (! defined $f) {
 661                                         warn("skipping bad filename $_\n");
 662                                 }
 663                                 else {
 664                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 665                                         push @files, $f;
 666                                         $exists{pagename($f)}=1;
 667                                 }
 668                         }
 669                 },
 670         }, $config{srcdir});
 671
 672         my %rendered;
 673
 674         # check for added or removed pages
 675         my @add;
 676         foreach my $file (@files) {
 677                 my $page=pagename($file);
 678                 if (! $oldpagemtime{$page}) {
 679                         debug("new page $page");
 680                         push @add, $file;
 681                         $links{$page}=[];
 682                         $pagesources{$page}=$file;
 683                 }
 684         }
 685         my @del;
 686         foreach my $page (keys %oldpagemtime) {
 687                 if (! $exists{$page}) {
 688                         debug("removing old page $page");
 689                         push @del, $pagesources{$page};
 690                         prune($config{destdir}."/".$renderedfiles{$page});
 691                         delete $renderedfiles{$page};
 692                         $oldpagemtime{$page}=0;
 693                         delete $pagesources{$page};
 694                 }
 695         }
 696
 697         # render any updated files
 698         foreach my $file (@files) {
 699                 my $page=pagename($file);
 700
 701                 if (! exists $oldpagemtime{$page} ||
 702                     mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 703                         debug("rendering changed file $file");
 704                         render($file);
 705                         $rendered{$file}=1;
 706                 }
 707         }
 708
 709         # if any files were added or removed, check to see if each page
 710         # needs an update due to linking to them
 711         # TODO: inefficient; pages may get rendered above and again here;
 712         # problem is the bestlink may have changed and we won't know until
 713         # now
 714         if (@add || @del) {
 715 FILE:           foreach my $file (@files) {
 716                         my $page=pagename($file);
 717                         foreach my $f (@add, @del) {
 718                                 my $p=pagename($f);
 719                                 foreach my $link (@{$links{$page}}) {
 720                                         if (bestlink($page, $link) eq $p) {
 721                                                 debug("rendering $file, which links to $p");
 722                                                 render($file);
 723                                                 $rendered{$file}=1;
 724                                                 next FILE;
 725                                         }
 726                                 }
 727                         }
 728                 }
 729         }
 730
 731         # handle backlinks; if a page has added/removed links, update the
 732         # pages it links to
 733         # TODO: inefficient; pages may get rendered above and again here;
 734         # problem is the backlinks could be wrong in the first pass render
 735         # above
 736         if (%rendered) {
 737                 my %linkchanged;
 738                 foreach my $file (keys %rendered, @del) {
 739                         my $page=pagename($file);
 740                         if (exists $links{$page}) {
 741                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 742                                         if (length $link &&
 743                                             ! exists $oldlinks{$page} ||
 744                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 745                                                 $linkchanged{$link}=1;
 746                                         }
 747                                 }
 748                         }
 749                         if (exists $oldlinks{$page}) {
 750                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 751                                         if (length $link &&
 752                                             ! exists $links{$page} ||
 753                                             ! grep { $_ eq $link } @{$links{$page}}) {
 754                                                 $linkchanged{$link}=1;
 755                                         }
 756                                 }
 757                         }
 758                 }
 759                 foreach my $link (keys %linkchanged) {
 760                         my $linkfile=$pagesources{$link};
 761                         if (defined $linkfile) {
 762                                 debug("rendering $linkfile, to update its backlinks");
 763                                 render($linkfile);
 764                         }
 765                 }
 766         }
 767 } #}}}
 768
 769 sub gen_wrapper () { #{{{
 770         eval q{use Cwd 'abs_path'};
 771         $config{srcdir}=abs_path($config{srcdir});
 772         $config{destdir}=abs_path($config{destdir});
 773         my $this=abs_path($0);
 774         if (! -x $this) {
 775                 error("$this doesn't seem to be executable");
 776         }
 777
 778         if ($config{setup}) {
 779                 error("cannot create a wrapper that uses a setup file");
 780         }
 781
 782         my @params=($config{srcdir}, $config{destdir},
 783                 "--wikiname=$config{wikiname}",
 784                 "--templatedir=$config{templatedir}");
 785         push @params, "--verbose" if $config{verbose};
 786         push @params, "--rebuild" if $config{rebuild};
 787         push @params, "--nosvn" if !$config{svn};
 788         push @params, "--cgi" if $config{cgi};
 789         push @params, "--url=$config{url}" if length $config{url};
 790         push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
 791         push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
 792         push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
 793         push @params, "--anonok" if $config{anonok};
 794         push @params, "--adminuser=$_" foreach @{$config{adminuser}};
 795         my $params=join(" ", @params);
 796         my $call='';
 797         foreach my $p ($this, $this, @params) {
 798                 $call.=qq{"$p", };
 799         }
 800         $call.="NULL";
 801
 802         my @envsave;
 803         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 804                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 805                        HTTP_COOKIE} if $config{cgi};
 806         my $envsave="";
 807         foreach my $var (@envsave) {
 808                 $envsave.=<<"EOF"
 809         if ((s=getenv("$var")))
 810                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 811 EOF
 812         }
 813
 814         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 815         print OUT <<"EOF";
 816 /* A wrapper for ikiwiki, can be safely made suid. */
 817 #define _GNU_SOURCE
 818 #include <stdio.h>
 819 #include <unistd.h>
 820 #include <stdlib.h>
 821 #include <string.h>
 822
 823 extern char **environ;
 824
 825 int main (int argc, char **argv) {
 826         /* Sanitize environment. */
 827         char *s;
 828         char *newenviron[$#envsave+3];
 829         int i=0;
 830 $envsave
 831         newenviron[i++]="HOME=$ENV{HOME}";
 832         newenviron[i]=NULL;
 833         environ=newenviron;
 834
 835         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 836                 printf("$params\\n");
 837                 exit(0);
 838         }
 839
 840         execl($call);
 841         perror("failed to run $this");
 842         exit(1);
 843 }
 844 EOF
 845         close OUT;
 846         if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
 847                 error("failed to compile ikiwiki-wrap.c");
 848         }
 849         unlink("ikiwiki-wrap.c");
 850         if (defined $config{wrappermode} &&
 851             ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
 852                 error("chmod $config{wrapper}: $!");
 853         }
 854         print "successfully generated $config{wrapper}\n";
 855 } #}}}
 856
 857 sub misctemplate ($$) { #{{{
 858         my $title=shift;
 859         my $pagebody=shift;
 860
 861         my $template=HTML::Template->new(
 862                 filename => "$config{templatedir}/misc.tmpl"
 863         );
 864         $template->param(
 865                 title => $title,
 866                 indexlink => indexlink(),
 867                 wikiname => $config{wikiname},
 868                 pagebody => $pagebody,
 869         );
 870         return $template->output;
 871 }#}}}
 872
 873 sub cgi_recentchanges ($) { #{{{
 874         my $q=shift;
 875
 876         my $template=HTML::Template->new(
 877                 filename => "$config{templatedir}/recentchanges.tmpl"
 878         );
 879         $template->param(
 880                 title => "RecentChanges",
 881                 indexlink => indexlink(),
 882                 wikiname => $config{wikiname},
 883                 changelog => [rcs_recentchanges(100)],
 884         );
 885         print $q->header, $template->output;
 886 } #}}}
 887
 888 sub userinfo_get ($$) { #{{{
 889         my $user=shift;
 890         my $field=shift;
 891
 892         eval q{use Storable};
 893         my $userdata=eval{ Storable::lock_retrieve("$config{wikistatedir}/userdb") };
 894         if (! defined $userdata || ! ref $userdata ||
 895             ! exists $userdata->{$user} || ! ref $userdata->{$user} ||
 896             ! exists $userdata->{$user}->{$field}) {
 897                 return "";
 898         }
 899         return $userdata->{$user}->{$field};
 900 } #}}}
 901
 902 sub userinfo_set ($$$) { #{{{
 903         my $user=shift;
 904         my $field=shift;
 905         my $value=shift;
 906
 907         eval q{use Storable};
 908         my $userdata=eval{ Storable::lock_retrieve("$config{wikistatedir}/userdb") };
 909         if (! defined $userdata || ! ref $userdata ||
 910             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 911                 return "";
 912         }
 913
 914         $userdata->{$user}->{$field}=$value;
 915         my $oldmask=umask(077);
 916         my $ret=Storable::lock_store($userdata, "$config{wikistatedir}/userdb");
 917         umask($oldmask);
 918         return $ret;
 919 } #}}}
 920
 921 sub userinfo_setall ($$) { #{{{
 922         my $user=shift;
 923         my $info=shift;
 924
 925         eval q{use Storable};
 926         my $userdata=eval{ Storable::lock_retrieve("$config{wikistatedir}/userdb") };
 927         if (! defined $userdata || ! ref $userdata) {
 928                 $userdata={};
 929         }
 930         $userdata->{$user}=$info;
 931         my $oldmask=umask(077);
 932         my $ret=Storable::lock_store($userdata, "$config{wikistatedir}/userdb");
 933         umask($oldmask);
 934         return $ret;
 935 } #}}}
 936
 937 sub cgi_signin ($$) { #{{{
 938         my $q=shift;
 939         my $session=shift;
 940
 941         eval q{use CGI::FormBuilder};
 942         my $form = CGI::FormBuilder->new(
 943                 title => "signin",
 944                 fields => [qw(do page from name password confirm_password email)],
 945                 header => 1,
 946                 method => 'POST',
 947                 validate => {
 948                         confirm_password => {
 949                                 perl => q{eq $form->field("password")},
 950                         },
 951                         email => 'EMAIL',
 952                 },
 953                 required => 'NONE',
 954                 javascript => 0,
 955                 params => $q,
 956                 action => $q->request_uri,
 957                 header => 0,
 958                 template => (-e "$config{templatedir}/signin.tmpl" ?
 959                               "$config{templatedir}/signin.tmpl" : "")
 960         );
 961
 962         $form->field(name => "name", required => 0);
 963         $form->field(name => "do", type => "hidden");
 964         $form->field(name => "page", type => "hidden");
 965         $form->field(name => "from", type => "hidden");
 966         $form->field(name => "password", type => "password", required => 0);
 967         $form->field(name => "confirm_password", type => "password", required => 0);
 968         $form->field(name => "email", required => 0);
 969         if ($q->param("do") ne "signin") {
 970                 $form->text("You need to log in first.");
 971         }
 972
 973         if ($form->submitted) {
 974                 # Set required fields based on how form was submitted.
 975                 my %required=(
 976                         "Login" => [qw(name password)],
 977                         "Register" => [qw(name password confirm_password email)],
 978                         "Mail Password" => [qw(name)],
 979                 );
 980                 foreach my $opt (@{$required{$form->submitted}}) {
 981                         $form->field(name => $opt, required => 1);
 982                 }
 983
 984                 # Validate password differently depending on how
 985                 # form was submitted.
 986                 if ($form->submitted eq 'Login') {
 987                         $form->field(
 988                                 name => "password",
 989                                 validate => sub {
 990                                         length $form->field("name") &&
 991                                         shift eq userinfo_get($form->field("name"), 'password');
 992                                 },
 993                         );
 994                         $form->field(name => "name", validate => '/^\w+$/');
 995                 }
 996                 else {
 997                         $form->field(name => "password", validate => 'VALUE');
 998                 }
 999                 # And make sure the entered name exists when logging
1000                 # in or sending email, and does not when registering.
1001                 if ($form->submitted eq 'Register') {
1002                         $form->field(
1003                                 name => "name",
1004                                 validate => sub {
1005                                         my $name=shift;
1006                                         length $name &&
1007                                         ! userinfo_get($name, "regdate");
1008                                 },
1009                         );
1010                 }
1011                 else {
1012                         $form->field(
1013                                 name => "name",
1014                                 validate => sub {
1015                                         my $name=shift;
1016                                         length $name &&
1017                                         userinfo_get($name, "regdate");
1018                                 },
1019                         );
1020                 }
1021         }
1022         else {
1023                 # First time settings.
1024                 $form->field(name => "name", comment => "use FirstnameLastName");
1025                 $form->field(name => "confirm_password", comment => "(only needed");
1026                 $form->field(name => "email",            comment => "for registration)");
1027                 if ($session->param("name")) {
1028                         $form->field(name => "name", value => $session->param("name"));
1029                 }
1030         }
1031
1032         if ($form->submitted && $form->validate) {
1033                 if ($form->submitted eq 'Login') {
1034                         $session->param("name", $form->field("name"));
1035                         if (defined $form->field("do") &&
1036                             $form->field("do") ne 'signin') {
1037                                 print $q->redirect(
1038                                         "$config{cgiurl}?do=".$form->field("do").
1039                                         "&page=".$form->field("page").
1040                                         "&from=".$form->field("from"));;
1041                         }
1042                         else {
1043                                 print $q->redirect($config{url});
1044                         }
1045                 }
1046                 elsif ($form->submitted eq 'Register') {
1047                         my $user_name=$form->field('name');
1048                         if (userinfo_setall($user_name, {
1049                                            'email' => $form->field('email'),
1050                                            'password' => $form->field('password'),
1051                                            'regdate' => time
1052                                          })) {
1053                                 $form->field(name => "confirm_password", type => "hidden");
1054                                 $form->field(name => "email", type => "hidden");
1055                                 $form->text("Registration successful. Now you can Login.");
1056                                 print $session->header();
1057                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
1058                         }
1059                         else {
1060                                 error("Error saving registration.");
1061                         }
1062                 }
1063                 elsif ($form->submitted eq 'Mail Password') {
1064                         my $user_name=$form->field("name");
1065                         my $template=HTML::Template->new(
1066                                 filename => "$config{templatedir}/passwordmail.tmpl"
1067                         );
1068                         $template->param(
1069                                 user_name => $user_name,
1070                                 user_password => userinfo_get($user_name, "password"),
1071                                 wikiurl => $config{url},
1072                                 wikiname => $config{wikiname},
1073                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
1074                         );
1075
1076                         eval q{use Mail::Sendmail};
1077                         my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
1078                         sendmail(
1079                                 To => userinfo_get($user_name, "email"),
1080                                 From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
1081                                 Subject => "$config{wikiname} information",
1082                                 Message => $template->output,
1083                         ) or error("Failed to send mail");
1084
1085                         $form->text("Your password has been emailed to you.");
1086                         $form->field(name => "name", required => 0);
1087                         print $session->header();
1088                         print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1089                 }
1090         }
1091         else {
1092                 print $session->header();
1093                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1094         }
1095 } #}}}
1096
1097 sub is_admin ($) { #{{{
1098         my $user_name=shift;
1099
1100         return grep { $_ eq $user_name } @{$config{adminuser}};
1101 } #}}}
1102
1103 sub glob_match ($$) { #{{{
1104         my $page=shift;
1105         my $glob=shift;
1106
1107         # turn glob into safe regexp
1108         $glob=quotemeta($glob);
1109         $glob=~s/\\\*/.*/g;
1110         $glob=~s/\\\?/./g;
1111         $glob=~s!\\/!/!g;
1112
1113         $page=~/^$glob$/i;
1114 } #}}}
1115
1116 sub globlist_match ($$) { #{{{
1117         my $page=shift;
1118         my @globlist=split(" ", shift);
1119
1120         # check any negated globs first
1121         foreach my $glob (@globlist) {
1122                 return 0 if $glob=~/^!(.*)/ && glob_match($page, $1);
1123         }
1124
1125         foreach my $glob (@globlist) {
1126                 return 1 if glob_match($page, $glob);
1127         }
1128
1129         return 0;
1130 } #}}}
1131
1132 sub page_locked ($$;$) { #{{{
1133         my $page=shift;
1134         my $session=shift;
1135         my $nonfatal=shift;
1136
1137         my $user=$session->param("name");
1138         return if length $user && is_admin($user);
1139
1140         foreach my $admin (@{$config{adminuser}}) {
1141                 my $locked_pages=userinfo_get($admin, "locked_pages");
1142                 if (globlist_match($page, userinfo_get($admin, "locked_pages"))) {
1143                         return 1 if $nonfatal;
1144                         error(htmllink("", $page, 1)." is locked by ".
1145                               htmllink("", $admin, 1)." and cannot be edited.");
1146                 }
1147         }
1148
1149         return 0;
1150 } #}}}
1151
1152 sub cgi_prefs ($$) { #{{{
1153         my $q=shift;
1154         my $session=shift;
1155
1156         eval q{use CGI::FormBuilder};
1157         my $form = CGI::FormBuilder->new(
1158                 title => "preferences",
1159                 fields => [qw(do name password confirm_password email locked_pages)],
1160                 header => 0,
1161                 method => 'POST',
1162                 validate => {
1163                         confirm_password => {
1164                                 perl => q{eq $form->field("password")},
1165                         },
1166                         email => 'EMAIL',
1167                 },
1168                 required => 'NONE',
1169                 javascript => 0,
1170                 params => $q,
1171                 action => $q->request_uri,
1172                 template => (-e "$config{templatedir}/prefs.tmpl" ?
1173                               "$config{templatedir}/prefs.tmpl" : "")
1174         );
1175         my @buttons=("Save Preferences", "Logout", "Cancel");
1176
1177         my $user_name=$session->param("name");
1178         $form->field(name => "do", type => "hidden");
1179         $form->field(name => "name", disabled => 1,
1180                 value => $user_name, force => 1);
1181         $form->field(name => "password", type => "password");
1182         $form->field(name => "confirm_password", type => "password");
1183         $form->field(name => "locked_pages", size => 50,
1184                 comment => "(".htmllink("", "GlobList", 1).")");
1185
1186         if (! is_admin($user_name)) {
1187                 $form->field(name => "locked_pages", type => "hidden");
1188         }
1189
1190         if (! $form->submitted) {
1191                 $form->field(name => "email", force => 1,
1192                         value => userinfo_get($user_name, "email"));
1193                 $form->field(name => "locked_pages", force => 1,
1194                         value => userinfo_get($user_name, "locked_pages"));
1195         }
1196
1197         if ($form->submitted eq 'Logout') {
1198                 $session->delete();
1199                 print $q->redirect($config{url});
1200                 return;
1201         }
1202         elsif ($form->submitted eq 'Cancel') {
1203                 print $q->redirect($config{url});
1204                 return;
1205         }
1206         elsif ($form->submitted eq "Save Preferences" && $form->validate) {
1207                 foreach my $field (qw(password email locked_pages)) {
1208                         if (length $form->field($field)) {
1209                                 userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
1210                         }
1211                 }
1212                 $form->text("Preferences saved.");
1213         }
1214
1215         print $session->header();
1216         print misctemplate($form->title, $form->render(submit => \@buttons));
1217 } #}}}
1218
1219 sub cgi_editpage ($$) { #{{{
1220         my $q=shift;
1221         my $session=shift;
1222
1223         eval q{use CGI::FormBuilder};
1224         my $form = CGI::FormBuilder->new(
1225                 fields => [qw(do rcsinfo from page content comments)],
1226                 header => 1,
1227                 method => 'POST',
1228                 validate => {
1229                         content => '/.+/',
1230                 },
1231                 required => [qw{content}],
1232                 javascript => 0,
1233                 params => $q,
1234                 action => $q->request_uri,
1235                 table => 0,
1236                 template => "$config{templatedir}/editpage.tmpl"
1237         );
1238         my @buttons=("Save Page", "Preview", "Cancel");
1239
1240         my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
1241         if (! defined $page || ! length $page || $page ne $q->param('page') ||
1242             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
1243                 error("bad page name");
1244         }
1245         $page=lc($page);
1246
1247         my $file=$page.$config{default_pageext};
1248         my $newfile=1;
1249         if (exists $pagesources{lc($page)}) {
1250                 $file=$pagesources{lc($page)};
1251                 $newfile=0;
1252         }
1253
1254         $form->field(name => "do", type => 'hidden');
1255         $form->field(name => "from", type => 'hidden');
1256         $form->field(name => "rcsinfo", type => 'hidden');
1257         $form->field(name => "page", value => "$page", force => 1);
1258         $form->field(name => "comments", type => "text", size => 80);
1259         $form->field(name => "content", type => "textarea", rows => 20,
1260                 cols => 80);
1261         $form->tmpl_param("can_commit", $config{svn});
1262         $form->tmpl_param("indexlink", indexlink());
1263         $form->tmpl_param("helponformattinglink",
1264                 htmllink("", "HelpOnFormatting", 1));
1265         if (! $form->submitted) {
1266                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1267                         force => 1);
1268         }
1269
1270         if ($form->submitted eq "Cancel") {
1271                 print $q->redirect("$config{url}/".htmlpage($page));
1272                 return;
1273         }
1274         elsif ($form->submitted eq "Preview") {
1275                 $form->tmpl_param("page_preview",
1276                         htmlize($config{default_pageext},
1277                                 linkify($form->field('content'), $page)));
1278         }
1279         else {
1280                 $form->tmpl_param("page_preview", "");
1281         }
1282         $form->tmpl_param("page_conflict", "");
1283
1284         if (! $form->submitted || $form->submitted eq "Preview" ||
1285             ! $form->validate) {
1286                 if ($form->field("do") eq "create") {
1287                         if (exists $pagesources{lc($page)}) {
1288                                 # hmm, someone else made the page in the
1289                                 # meantime?
1290                                 print $q->redirect("$config{url}/".htmlpage($page));
1291                                 return;
1292                         }
1293
1294                         my @page_locs;
1295                         my $best_loc;
1296                         my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
1297                         if (! defined $from || ! length $from ||
1298                             $from ne $form->param('from') ||
1299                             $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
1300                                 @page_locs=$best_loc=$page;
1301                         }
1302                         else {
1303                                 my $dir=$from."/";
1304                                 $dir=~s![^/]+/$!!;
1305
1306                                 if ($page eq 'discussion') {
1307                                         $best_loc="$from/$page";
1308                                 }
1309                                 else {
1310                                         $best_loc=$dir.$page;
1311                                 }
1312
1313                                 push @page_locs, $dir.$page;
1314                                 push @page_locs, "$from/$page";
1315                                 while (length $dir) {
1316                                         $dir=~s![^/]+/$!!;
1317                                         push @page_locs, $dir.$page;
1318                                 }
1319
1320                                 @page_locs = grep {
1321                                         ! exists $pagesources{lc($_)} &&
1322                                         ! page_locked($_, $session, 1)
1323                                 } @page_locs;
1324                         }
1325
1326                         $form->tmpl_param("page_select", 1);
1327                         $form->field(name => "page", type => 'select',
1328                                 options => \@page_locs, value => $best_loc);
1329                         $form->title("creating $page");
1330                 }
1331                 elsif ($form->field("do") eq "edit") {
1332                         page_locked($page, $session);
1333                         if (! defined $form->field('content') ||
1334                             ! length $form->field('content')) {
1335                                 my $content="";
1336                                 if (exists $pagesources{lc($page)}) {
1337                                                 $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
1338                                         $content=~s/\n/\r\n/g;
1339                                 }
1340                                 $form->field(name => "content", value => $content,
1341                                         force => 1);
1342                         }
1343                         $form->tmpl_param("page_select", 0);
1344                         $form->field(name => "page", type => 'hidden');
1345                         $form->title("editing $page");
1346                 }
1347
1348                 print $form->render(submit => \@buttons);
1349         }
1350         else {
1351                 # save page
1352                 page_locked($page, $session);
1353
1354                 my $content=$form->field('content');
1355                 $content=~s/\r\n/\n/g;
1356                 $content=~s/\r/\n/g;
1357                 writefile("$config{srcdir}/$file", $content);
1358
1359                 my $message="web commit ";
1360                 if (length $session->param("name")) {
1361                         $message.="by ".$session->param("name");
1362                 }
1363                 else {
1364                         $message.="from $ENV{REMOTE_ADDR}";
1365                 }
1366                 if (defined $form->field('comments') &&
1367                     length $form->field('comments')) {
1368                         $message.=": ".$form->field('comments');
1369                 }
1370
1371                 if ($config{svn}) {
1372                         if ($newfile) {
1373                                 rcs_add($file);
1374                         }
1375                         # prevent deadlock with post-commit hook
1376                         unlockwiki();
1377                         # presumably the commit will trigger an update
1378                         # of the wiki
1379                         my $conflict=rcs_commit($file, $message,
1380                                 $form->field("rcsinfo"));
1381
1382                         if (defined $conflict) {
1383                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1384                                         force => 1);
1385                                 $form->tmpl_param("page_conflict", 1);
1386                                 $form->field("content", value => $conflict, force => 1);
1387                                 $form->field("do", "edit)");
1388                                 $form->tmpl_param("page_select", 0);
1389                                 $form->field(name => "page", type => 'hidden');
1390                                 $form->title("editing $page");
1391                                 print $form->render(submit => \@buttons);
1392                                 return;
1393                         }
1394                 }
1395                 else {
1396                         loadindex();
1397                         refresh();
1398                         saveindex();
1399                 }
1400
1401                 # The trailing question mark tries to avoid broken
1402                 # caches and get the most recent version of the page.
1403                 print $q->redirect("$config{url}/".htmlpage($page)."?updated");
1404         }
1405 } #}}}
1406
1407 sub cgi () { #{{{
1408         eval q{use CGI};
1409         eval q{use CGI::Session};
1410
1411         my $q=CGI->new;
1412
1413         my $do=$q->param('do');
1414         if (! defined $do || ! length $do) {
1415                 error("\"do\" parameter missing");
1416         }
1417
1418         # This does not need a session.
1419         if ($do eq 'recentchanges') {
1420                 cgi_recentchanges($q);
1421                 return;
1422         }
1423
1424         CGI::Session->name("ikiwiki_session");
1425
1426         my $oldmask=umask(077);
1427         my $session = CGI::Session->new("driver:db_file", $q,
1428                 { FileName => "$config{wikistatedir}/sessions.db" });
1429         umask($oldmask);
1430
1431         # Everything below this point needs the user to be signed in.
1432         if ((! $config{anonok} && ! defined $session->param("name") ||
1433              ! defined $session->param("name") ||
1434              ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
1435                 cgi_signin($q, $session);
1436
1437                 # Force session flush with safe umask.
1438                 my $oldmask=umask(077);
1439                 $session->flush;
1440                 umask($oldmask);
1441
1442                 return;
1443         }
1444
1445         if ($do eq 'create' || $do eq 'edit') {
1446                 cgi_editpage($q, $session);
1447         }
1448         elsif ($do eq 'prefs') {
1449                 cgi_prefs($q, $session);
1450         }
1451         else {
1452                 error("unknown do parameter");
1453         }
1454 } #}}}
1455
1456 sub setup () { # {{{
1457         my $setup=possibly_foolish_untaint($config{setup});
1458         delete $config{setup};
1459         open (IN, $setup) || error("read $setup: $!\n");
1460         local $/=undef;
1461         my $code=<IN>;
1462         ($code)=$code=~/(.*)/s;
1463         close IN;
1464
1465         eval $code;
1466         error($@) if $@;
1467         exit;
1468 } #}}}
1469
1470 # main {{{
1471 setup() if $config{setup};
1472 lockwiki();
1473 if ($config{wrapper}) {
1474         gen_wrapper();
1475         exit;
1476 }
1477 memoize('pagename');
1478 memoize('bestlink');
1479 loadindex() unless $config{rebuild};
1480 if ($config{cgi}) {
1481         cgi();
1482 }
1483 else {
1484         rcs_update() if $config{svn};
1485         refresh();
1486         saveindex();
1487 }
1488 #}}}