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         if (-l $file) {
 156                 error("cannot read a symlink ($file)");
 157         }
 158
 159         local $/=undef;
 160         open (IN, "$file") || error("failed to read $file: $!");
 161         my $ret=<IN>;
 162         close IN;
 163         return $ret;
 164 } #}}}
 165
 166 sub writefile ($$) { #{{{
 167         my $file=shift;
 168         my $content=shift;
 169
 170         if (-l $file) {
 171                 error("cannot write to a symlink ($file)");
 172         }
 173
 174         my $dir=dirname($file);
 175         if (! -d $dir) {
 176                 my $d="";
 177                 foreach my $s (split(m!/+!, $dir)) {
 178                         $d.="$s/";
 179                         if (! -d $d) {
 180                                 mkdir($d) || error("failed to create directory $d: $!");
 181                         }
 182                 }
 183         }
 184
 185         open (OUT, ">$file") || error("failed to write $file: $!");
 186         print OUT $content;
 187         close OUT;
 188 } #}}}
 189
 190 sub findlinks ($$) { #{{{
 191         my $content=shift;
 192         my $page=shift;
 193
 194         my @links;
 195         while ($content =~ /(?<!\\)$config{wiki_link_regexp}/g) {
 196                 push @links, lc($1);
 197         }
 198         # Discussion links are a special case since they're not in the text
 199         # of the page, but on its template.
 200         return @links, "$page/discussion";
 201 } #}}}
 202
 203 sub bestlink ($$) { #{{{
 204         # Given a page and the text of a link on the page, determine which
 205         # existing page that link best points to. Prefers pages under a
 206         # subdirectory with the same name as the source page, failing that
 207         # goes down the directory tree to the base looking for matching
 208         # pages.
 209         my $page=shift;
 210         my $link=lc(shift);
 211
 212         my $cwd=$page;
 213         do {
 214                 my $l=$cwd;
 215                 $l.="/" if length $l;
 216                 $l.=$link;
 217
 218                 if (exists $links{$l}) {
 219                         #debug("for $page, \"$link\", use $l");
 220                         return $l;
 221                 }
 222         } while $cwd=~s!/?[^/]+$!!;
 223
 224         #print STDERR "warning: page $page, broken link: $link\n";
 225         return "";
 226 } #}}}
 227
 228 sub isinlinableimage ($) { #{{{
 229         my $file=shift;
 230
 231         $file=~/\.(png|gif|jpg|jpeg)$/;
 232 } #}}}
 233
 234 sub htmllink { #{{{
 235         my $page=shift;
 236         my $link=shift;
 237         my $noimageinline=shift; # don't turn links into inline html images
 238         my $forcesubpage=shift; # force a link to a subpage
 239
 240         my $bestlink;
 241         if (! $forcesubpage) {
 242                 $bestlink=bestlink($page, $link);
 243         }
 244         else {
 245                 $bestlink="$page/".lc($link);
 246         }
 247
 248         return $link if length $bestlink && $page eq $bestlink;
 249
 250         # TODO BUG: %renderedfiles may not have it, if the linked to page
 251         # was also added and isn't yet rendered! Note that this bug is
 252         # masked by the bug mentioned below that makes all new files
 253         # be rendered twice.
 254         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 255                 $bestlink=htmlpage($bestlink);
 256         }
 257         if (! grep { $_ eq $bestlink } values %renderedfiles) {
 258                 return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
 259         }
 260
 261         $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
 262
 263         if (! $noimageinline && isinlinableimage($bestlink)) {
 264                 return "<img src=\"$bestlink\">";
 265         }
 266         return "<a href=\"$bestlink\">$link</a>";
 267 } #}}}
 268
 269 sub linkify ($$) { #{{{
 270         my $content=shift;
 271         my $page=shift;
 272
 273         $content =~ s{(\\?)$config{wiki_link_regexp}}{
 274                 $1 ? "[[$2]]" : htmllink($page, $2)
 275         }eg;
 276
 277         return $content;
 278 } #}}}
 279
 280 sub htmlize ($$) { #{{{
 281         my $type=shift;
 282         my $content=shift;
 283
 284         if (! $INC{"/usr/bin/markdown"}) {
 285                 no warnings 'once';
 286                 $blosxom::version="is a proper perl module too much to ask?";
 287                 use warnings 'all';
 288                 do "/usr/bin/markdown";
 289         }
 290
 291         if ($type eq '.mdwn') {
 292                 return Markdown::Markdown($content);
 293         }
 294         else {
 295                 error("htmlization of $type not supported");
 296         }
 297 } #}}}
 298
 299 sub backlinks ($) { #{{{
 300         my $page=shift;
 301
 302         my @links;
 303         foreach my $p (keys %links) {
 304                 next if bestlink($page, $p) eq $page;
 305                 if (grep { length $_ && bestlink($p, $_) eq $page } @{$links{$p}}) {
 306                         my $href=File::Spec->abs2rel(htmlpage($p), dirname($page));
 307
 308                         # Trim common dir prefixes from both pages.
 309                         my $p_trimmed=$p;
 310                         my $page_trimmed=$page;
 311                         my $dir;
 312                         1 while (($dir)=$page_trimmed=~m!^([^/]+/)!) &&
 313                                 defined $dir &&
 314                                 $p_trimmed=~s/^\Q$dir\E// &&
 315                                 $page_trimmed=~s/^\Q$dir\E//;
 316
 317                         push @links, { url => $href, page => $p_trimmed };
 318                 }
 319         }
 320
 321         return sort { $a->{page} cmp $b->{page} } @links;
 322 } #}}}
 323
 324 sub parentlinks ($) { #{{{
 325         my $page=shift;
 326
 327         my @ret;
 328         my $pagelink="";
 329         my $path="";
 330         my $skip=1;
 331         foreach my $dir (reverse split("/", $page)) {
 332                 if (! $skip) {
 333                         $path.="../";
 334                         unshift @ret, { url => "$path$dir.html", page => $dir };
 335                 }
 336                 else {
 337                         $skip=0;
 338                 }
 339         }
 340         unshift @ret, { url => length $path ? $path : ".", page => $config{wikiname} };
 341         return @ret;
 342 } #}}}
 343
 344 sub indexlink () { #{{{
 345         return "<a href=\"$config{url}\">$config{wikiname}</a>";
 346 } #}}}
 347
 348 sub finalize ($$$) { #{{{
 349         my $content=shift;
 350         my $page=shift;
 351         my $mtime=shift;
 352
 353         my $title=basename($page);
 354         $title=~s/_/ /g;
 355
 356         my $template=HTML::Template->new(blind_cache => 1,
 357                 filename => "$config{templatedir}/page.tmpl");
 358
 359         if (length $config{cgiurl}) {
 360                 $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
 361                 $template->param(prefsurl => "$config{cgiurl}?do=prefs");
 362                 if ($config{svn}) {
 363                         $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
 364                 }
 365         }
 366
 367         if (length $config{historyurl}) {
 368                 my $u=$config{historyurl};
 369                 $u=~s/\[\[file\]\]/$pagesources{$page}/g;
 370                 $template->param(historyurl => $u);
 371         }
 372
 373         $template->param(
 374                 title => $title,
 375                 wikiname => $config{wikiname},
 376                 parentlinks => [parentlinks($page)],
 377                 content => $content,
 378                 backlinks => [backlinks($page)],
 379                 discussionlink => htmllink($page, "Discussion", 1, 1),
 380                 mtime => scalar(gmtime($mtime)),
 381         );
 382
 383         return $template->output;
 384 } #}}}
 385
 386 sub check_overwrite ($$) { #{{{
 387         # Important security check. Make sure to call this before saving
 388         # any files to the source directory.
 389         my $dest=shift;
 390         my $src=shift;
 391
 392         if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
 393                 error("$dest already exists and was rendered from ".
 394                         join(" ",(grep { $renderedfiles{$_} eq $dest } keys
 395                                 %renderedfiles)).
 396                         ", before, so not rendering from $src");
 397         }
 398 } #}}}
 399
 400 sub render ($) { #{{{
 401         my $file=shift;
 402
 403         my $type=pagetype($file);
 404         my $content=readfile("$config{srcdir}/$file");
 405         if ($type ne 'unknown') {
 406                 my $page=pagename($file);
 407
 408                 $links{$page}=[findlinks($content, $page)];
 409
 410                 $content=linkify($content, $page);
 411                 $content=htmlize($type, $content);
 412                 $content=finalize($content, $page,
 413                         mtime("$config{srcdir}/$file"));
 414
 415                 check_overwrite("$config{destdir}/".htmlpage($page), $page);
 416                 writefile("$config{destdir}/".htmlpage($page), $content);
 417                 $oldpagemtime{$page}=time;
 418                 $renderedfiles{$page}=htmlpage($page);
 419         }
 420         else {
 421                 $links{$file}=[];
 422                 check_overwrite("$config{destdir}/$file", $file);
 423                 writefile("$config{destdir}/$file", $content);
 424                 $oldpagemtime{$file}=time;
 425                 $renderedfiles{$file}=$file;
 426         }
 427 } #}}}
 428
 429 sub lockwiki () { #{{{
 430         # Take an exclusive lock on the wiki to prevent multiple concurrent
 431         # run issues. The lock will be dropped on program exit.
 432         if (! -d $config{wikistatedir}) {
 433                 mkdir($config{wikistatedir});
 434         }
 435         open(WIKILOCK, ">$config{wikistatedir}/lockfile") ||
 436                 error ("cannot write to $config{wikistatedir}/lockfile: $!");
 437         if (! flock(WIKILOCK, 2 | 4)) {
 438                 debug("wiki seems to be locked, waiting for lock");
 439                 my $wait=600; # arbitrary, but don't hang forever to
 440                               # prevent process pileup
 441                 for (1..600) {
 442                         return if flock(WIKILOCK, 2 | 4);
 443                         sleep 1;
 444                 }
 445                 error("wiki is locked; waited $wait seconds without lock being freed (possible stuck process or stale lock?)");
 446         }
 447 } #}}}
 448
 449 sub unlockwiki () { #{{{
 450         close WIKILOCK;
 451 } #}}}
 452
 453 sub loadindex () { #{{{
 454         open (IN, "$config{wikistatedir}/index") || return;
 455         while (<IN>) {
 456                 $_=possibly_foolish_untaint($_);
 457                 chomp;
 458                 my ($mtime, $file, $rendered, @links)=split(' ', $_);
 459                 my $page=pagename($file);
 460                 $pagesources{$page}=$file;
 461                 $oldpagemtime{$page}=$mtime;
 462                 $oldlinks{$page}=[@links];
 463                 $links{$page}=[@links];
 464                 $renderedfiles{$page}=$rendered;
 465         }
 466         close IN;
 467 } #}}}
 468
 469 sub saveindex () { #{{{
 470         if (! -d $config{wikistatedir}) {
 471                 mkdir($config{wikistatedir});
 472         }
 473         open (OUT, ">$config{wikistatedir}/index") ||
 474                 error("cannot write to $config{wikistatedir}/index: $!");
 475         foreach my $page (keys %oldpagemtime) {
 476                 print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
 477                         join(" ", @{$links{$page}})."\n"
 478                                 if $oldpagemtime{$page};
 479         }
 480         close OUT;
 481 } #}}}
 482
 483 sub rcs_update () { #{{{
 484         if (-d "$config{srcdir}/.svn") {
 485                 if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
 486                         warn("svn update failed\n");
 487                 }
 488         }
 489 } #}}}
 490
 491 sub rcs_prepedit ($) { #{{{
 492         # Prepares to edit a file under revision control. Returns a token
 493         # that must be passed into rcs_commit when the file is ready
 494         # for committing.
 495         # The file is relative to the srcdir.
 496         my $file=shift;
 497
 498         if (-d "$config{srcdir}/.svn") {
 499                 # For subversion, return the revision of the file when
 500                 # editing begins.
 501                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 502                 return defined $rev ? $rev : "";
 503         }
 504 } #}}}
 505
 506 sub rcs_commit ($$$) { #{{{
 507         # Tries to commit the page; returns undef on _success_ and
 508         # a version of the page with the rcs's conflict markers on failure.
 509         # The file is relative to the srcdir.
 510         my $file=shift;
 511         my $message=shift;
 512         my $rcstoken=shift;
 513
 514         if (-d "$config{srcdir}/.svn") {
 515                 # Check to see if the page has been changed by someone
 516                 # else since rcs_prepedit was called.
 517                 my ($oldrev)=$rcstoken=~/^([0-9]+)$/; # untaint
 518                 my $rev=svn_info("Revision", "$config{srcdir}/$file");
 519                 if (defined $rev && defined $oldrev && $rev != $oldrev) {
 520                         # Merge their changes into the file that we've
 521                         # changed.
 522                         chdir($config{srcdir}); # svn merge wants to be here
 523                         if (system("svn", "merge", "--quiet", "-r$oldrev:$rev",
 524                                    "$config{srcdir}/$file") != 0) {
 525                                 warn("svn merge -r$oldrev:$rev failed\n");
 526                         }
 527                 }
 528
 529                 if (system("svn", "commit", "--quiet", "-m",
 530                            possibly_foolish_untaint($message),
 531                            "$config{srcdir}") != 0) {
 532                         my $conflict=readfile("$config{srcdir}/$file");
 533                         if (system("svn", "revert", "--quiet", "$config{srcdir}/$file") != 0) {
 534                                 warn("svn revert failed\n");
 535                         }
 536                         return $conflict;
 537                 }
 538         }
 539         return undef # success
 540 } #}}}
 541
 542 sub rcs_add ($) { #{{{
 543         # filename is relative to the root of the srcdir
 544         my $file=shift;
 545
 546         if (-d "$config{srcdir}/.svn") {
 547                 my $parent=dirname($file);
 548                 while (! -d "$config{srcdir}/$parent/.svn") {
 549                         $file=$parent;
 550                         $parent=dirname($file);
 551                 }
 552
 553                 if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
 554                         warn("svn add failed\n");
 555                 }
 556         }
 557 } #}}}
 558
 559 sub svn_info ($$) { #{{{
 560         my $field=shift;
 561         my $file=shift;
 562
 563         my $info=`LANG=C svn info $file`;
 564         my ($ret)=$info=~/^$field: (.*)$/m;
 565         return $ret;
 566 } #}}}
 567
 568 sub rcs_recentchanges ($) { #{{{
 569         my $num=shift;
 570         my @ret;
 571
 572         eval q{use CGI 'escapeHTML'};
 573         eval q{use Date::Parse};
 574         eval q{use Time::Duration};
 575
 576         if (-d "$config{srcdir}/.svn") {
 577                 my $svn_url=svn_info("URL", $config{srcdir});
 578
 579                 # FIXME: currently assumes that the wiki is somewhere
 580                 # under trunk in svn, doesn't support other layouts.
 581                 my ($svn_base)=$svn_url=~m!(/trunk(?:/.*)?)$!;
 582
 583                 my $div=qr/^--------------------+$/;
 584                 my $infoline=qr/^r(\d+)\s+\|\s+([^\s]+)\s+\|\s+(\d+-\d+-\d+\s+\d+:\d+:\d+\s+[-+]?\d+).*/;
 585                 my $state='start';
 586                 my ($rev, $user, $when, @pages, @message);
 587                 foreach (`LANG=C svn log --limit $num -v '$svn_url'`) {
 588                         chomp;
 589                         if ($state eq 'start' && /$div/) {
 590                                 $state='header';
 591                         }
 592                         elsif ($state eq 'header' && /$infoline/) {
 593                                 $rev=$1;
 594                                 $user=$2;
 595                                 $when=concise(ago(time - str2time($3)));
 596                         }
 597                         elsif ($state eq 'header' && /^\s+[A-Z]\s+\Q$svn_base\E\/([^ ]+)(?:$|\s)/) {
 598                                 my $file=$1;
 599                                 my $diffurl=$config{diffurl};
 600                                 $diffurl=~s/\[\[file\]\]/$file/g;
 601                                 $diffurl=~s/\[\[r1\]\]/$rev - 1/eg;
 602                                 $diffurl=~s/\[\[r2\]\]/$rev/g;
 603                                 push @pages, {
 604                                         link => htmllink("", pagename($file), 1),
 605                                         diffurl => $diffurl,
 606                                 } if length $file;
 607                         }
 608                         elsif ($state eq 'header' && /^$/) {
 609                                 $state='body';
 610                         }
 611                         elsif ($state eq 'body' && /$div/) {
 612                                 my $committype="web";
 613                                 if (defined $message[0] &&
 614                                     $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
 615                                         $user="$1";
 616                                         $message[0]->{line}=$2;
 617                                 }
 618                                 else {
 619                                         $committype="svn";
 620                                 }
 621
 622                                 push @ret, { rev => $rev,
 623                                         user => htmllink("", $user, 1),
 624                                         committype => $committype,
 625                                         when => $when, message => [@message],
 626                                         pages => [@pages],
 627                                 } if @pages;
 628                                 return @ret if @ret >= $num;
 629
 630                                 $state='header';
 631                                 $rev=$user=$when=undef;
 632                                 @pages=@message=();
 633                         }
 634                         elsif ($state eq 'body') {
 635                                 push @message, {line => escapeHTML($_)},
 636                         }
 637                 }
 638         }
 639
 640         return @ret;
 641 } #}}}
 642
 643 sub prune ($) { #{{{
 644         my $file=shift;
 645
 646         unlink($file);
 647         my $dir=dirname($file);
 648         while (rmdir($dir)) {
 649                 $dir=dirname($dir);
 650         }
 651 } #}}}
 652
 653 sub refresh () { #{{{
 654         # find existing pages
 655         my %exists;
 656         my @files;
 657         eval q{use File::Find};
 658         find({
 659                 no_chdir => 1,
 660                 wanted => sub {
 661                         if (/$config{wiki_file_prune_regexp}/) {
 662                                 no warnings 'once';
 663                                 $File::Find::prune=1;
 664                                 use warnings "all";
 665                         }
 666                         elsif (! -d $_ && ! -l $_) {
 667                                 my ($f)=/$config{wiki_file_regexp}/; # untaint
 668                                 if (! defined $f) {
 669                                         warn("skipping bad filename $_\n");
 670                                 }
 671                                 else {
 672                                         $f=~s/^\Q$config{srcdir}\E\/?//;
 673                                         push @files, $f;
 674                                         $exists{pagename($f)}=1;
 675                                 }
 676                         }
 677                 },
 678         }, $config{srcdir});
 679
 680         my %rendered;
 681
 682         # check for added or removed pages
 683         my @add;
 684         foreach my $file (@files) {
 685                 my $page=pagename($file);
 686                 if (! $oldpagemtime{$page}) {
 687                         debug("new page $page");
 688                         push @add, $file;
 689                         $links{$page}=[];
 690                         $pagesources{$page}=$file;
 691                 }
 692         }
 693         my @del;
 694         foreach my $page (keys %oldpagemtime) {
 695                 if (! $exists{$page}) {
 696                         debug("removing old page $page");
 697                         push @del, $pagesources{$page};
 698                         prune($config{destdir}."/".$renderedfiles{$page});
 699                         delete $renderedfiles{$page};
 700                         $oldpagemtime{$page}=0;
 701                         delete $pagesources{$page};
 702                 }
 703         }
 704
 705         # render any updated files
 706         foreach my $file (@files) {
 707                 my $page=pagename($file);
 708
 709                 if (! exists $oldpagemtime{$page} ||
 710                     mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
 711                         debug("rendering changed file $file");
 712                         render($file);
 713                         $rendered{$file}=1;
 714                 }
 715         }
 716
 717         # if any files were added or removed, check to see if each page
 718         # needs an update due to linking to them
 719         # TODO: inefficient; pages may get rendered above and again here;
 720         # problem is the bestlink may have changed and we won't know until
 721         # now
 722         if (@add || @del) {
 723 FILE:           foreach my $file (@files) {
 724                         my $page=pagename($file);
 725                         foreach my $f (@add, @del) {
 726                                 my $p=pagename($f);
 727                                 foreach my $link (@{$links{$page}}) {
 728                                         if (bestlink($page, $link) eq $p) {
 729                                                 debug("rendering $file, which links to $p");
 730                                                 render($file);
 731                                                 $rendered{$file}=1;
 732                                                 next FILE;
 733                                         }
 734                                 }
 735                         }
 736                 }
 737         }
 738
 739         # handle backlinks; if a page has added/removed links, update the
 740         # pages it links to
 741         # TODO: inefficient; pages may get rendered above and again here;
 742         # problem is the backlinks could be wrong in the first pass render
 743         # above
 744         if (%rendered) {
 745                 my %linkchanged;
 746                 foreach my $file (keys %rendered, @del) {
 747                         my $page=pagename($file);
 748                         if (exists $links{$page}) {
 749                                 foreach my $link (map { bestlink($page, $_) } @{$links{$page}}) {
 750                                         if (length $link &&
 751                                             ! exists $oldlinks{$page} ||
 752                                             ! grep { $_ eq $link } @{$oldlinks{$page}}) {
 753                                                 $linkchanged{$link}=1;
 754                                         }
 755                                 }
 756                         }
 757                         if (exists $oldlinks{$page}) {
 758                                 foreach my $link (map { bestlink($page, $_) } @{$oldlinks{$page}}) {
 759                                         if (length $link &&
 760                                             ! exists $links{$page} ||
 761                                             ! grep { $_ eq $link } @{$links{$page}}) {
 762                                                 $linkchanged{$link}=1;
 763                                         }
 764                                 }
 765                         }
 766                 }
 767                 foreach my $link (keys %linkchanged) {
 768                         my $linkfile=$pagesources{$link};
 769                         if (defined $linkfile) {
 770                                 debug("rendering $linkfile, to update its backlinks");
 771                                 render($linkfile);
 772                         }
 773                 }
 774         }
 775 } #}}}
 776
 777 sub gen_wrapper () { #{{{
 778         eval q{use Cwd 'abs_path'};
 779         $config{srcdir}=abs_path($config{srcdir});
 780         $config{destdir}=abs_path($config{destdir});
 781         my $this=abs_path($0);
 782         if (! -x $this) {
 783                 error("$this doesn't seem to be executable");
 784         }
 785
 786         if ($config{setup}) {
 787                 error("cannot create a wrapper that uses a setup file");
 788         }
 789
 790         my @params=($config{srcdir}, $config{destdir},
 791                 "--wikiname=$config{wikiname}",
 792                 "--templatedir=$config{templatedir}");
 793         push @params, "--verbose" if $config{verbose};
 794         push @params, "--rebuild" if $config{rebuild};
 795         push @params, "--nosvn" if !$config{svn};
 796         push @params, "--cgi" if $config{cgi};
 797         push @params, "--url=$config{url}" if length $config{url};
 798         push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
 799         push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
 800         push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
 801         push @params, "--anonok" if $config{anonok};
 802         push @params, "--adminuser=$_" foreach @{$config{adminuser}};
 803         my $params=join(" ", @params);
 804         my $call='';
 805         foreach my $p ($this, $this, @params) {
 806                 $call.=qq{"$p", };
 807         }
 808         $call.="NULL";
 809
 810         my @envsave;
 811         push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 812                        CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
 813                        HTTP_COOKIE} if $config{cgi};
 814         my $envsave="";
 815         foreach my $var (@envsave) {
 816                 $envsave.=<<"EOF"
 817         if ((s=getenv("$var")))
 818                 asprintf(&newenviron[i++], "%s=%s", "$var", s);
 819 EOF
 820         }
 821
 822         open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
 823         print OUT <<"EOF";
 824 /* A wrapper for ikiwiki, can be safely made suid. */
 825 #define _GNU_SOURCE
 826 #include <stdio.h>
 827 #include <unistd.h>
 828 #include <stdlib.h>
 829 #include <string.h>
 830
 831 extern char **environ;
 832
 833 int main (int argc, char **argv) {
 834         /* Sanitize environment. */
 835         char *s;
 836         char *newenviron[$#envsave+3];
 837         int i=0;
 838 $envsave
 839         newenviron[i++]="HOME=$ENV{HOME}";
 840         newenviron[i]=NULL;
 841         environ=newenviron;
 842
 843         if (argc == 2 && strcmp(argv[1], "--params") == 0) {
 844                 printf("$params\\n");
 845                 exit(0);
 846         }
 847
 848         execl($call);
 849         perror("failed to run $this");
 850         exit(1);
 851 }
 852 EOF
 853         close OUT;
 854         if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
 855                 error("failed to compile ikiwiki-wrap.c");
 856         }
 857         unlink("ikiwiki-wrap.c");
 858         if (defined $config{wrappermode} &&
 859             ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
 860                 error("chmod $config{wrapper}: $!");
 861         }
 862         print "successfully generated $config{wrapper}\n";
 863 } #}}}
 864
 865 sub misctemplate ($$) { #{{{
 866         my $title=shift;
 867         my $pagebody=shift;
 868
 869         my $template=HTML::Template->new(
 870                 filename => "$config{templatedir}/misc.tmpl"
 871         );
 872         $template->param(
 873                 title => $title,
 874                 indexlink => indexlink(),
 875                 wikiname => $config{wikiname},
 876                 pagebody => $pagebody,
 877         );
 878         return $template->output;
 879 }#}}}
 880
 881 sub cgi_recentchanges ($) { #{{{
 882         my $q=shift;
 883
 884         my $template=HTML::Template->new(
 885                 filename => "$config{templatedir}/recentchanges.tmpl"
 886         );
 887         $template->param(
 888                 title => "RecentChanges",
 889                 indexlink => indexlink(),
 890                 wikiname => $config{wikiname},
 891                 changelog => [rcs_recentchanges(100)],
 892         );
 893         print $q->header, $template->output;
 894 } #}}}
 895
 896 sub userinfo_get ($$) { #{{{
 897         my $user=shift;
 898         my $field=shift;
 899
 900         eval q{use Storable};
 901         my $userdata=eval{ Storable::lock_retrieve("$config{wikistatedir}/userdb") };
 902         if (! defined $userdata || ! ref $userdata ||
 903             ! exists $userdata->{$user} || ! ref $userdata->{$user} ||
 904             ! exists $userdata->{$user}->{$field}) {
 905                 return "";
 906         }
 907         return $userdata->{$user}->{$field};
 908 } #}}}
 909
 910 sub userinfo_set ($$$) { #{{{
 911         my $user=shift;
 912         my $field=shift;
 913         my $value=shift;
 914
 915         eval q{use Storable};
 916         my $userdata=eval{ Storable::lock_retrieve("$config{wikistatedir}/userdb") };
 917         if (! defined $userdata || ! ref $userdata ||
 918             ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
 919                 return "";
 920         }
 921
 922         $userdata->{$user}->{$field}=$value;
 923         my $oldmask=umask(077);
 924         my $ret=Storable::lock_store($userdata, "$config{wikistatedir}/userdb");
 925         umask($oldmask);
 926         return $ret;
 927 } #}}}
 928
 929 sub userinfo_setall ($$) { #{{{
 930         my $user=shift;
 931         my $info=shift;
 932
 933         eval q{use Storable};
 934         my $userdata=eval{ Storable::lock_retrieve("$config{wikistatedir}/userdb") };
 935         if (! defined $userdata || ! ref $userdata) {
 936                 $userdata={};
 937         }
 938         $userdata->{$user}=$info;
 939         my $oldmask=umask(077);
 940         my $ret=Storable::lock_store($userdata, "$config{wikistatedir}/userdb");
 941         umask($oldmask);
 942         return $ret;
 943 } #}}}
 944
 945 sub cgi_signin ($$) { #{{{
 946         my $q=shift;
 947         my $session=shift;
 948
 949         eval q{use CGI::FormBuilder};
 950         my $form = CGI::FormBuilder->new(
 951                 title => "signin",
 952                 fields => [qw(do page from name password confirm_password email)],
 953                 header => 1,
 954                 method => 'POST',
 955                 validate => {
 956                         confirm_password => {
 957                                 perl => q{eq $form->field("password")},
 958                         },
 959                         email => 'EMAIL',
 960                 },
 961                 required => 'NONE',
 962                 javascript => 0,
 963                 params => $q,
 964                 action => $q->request_uri,
 965                 header => 0,
 966                 template => (-e "$config{templatedir}/signin.tmpl" ?
 967                               "$config{templatedir}/signin.tmpl" : "")
 968         );
 969
 970         $form->field(name => "name", required => 0);
 971         $form->field(name => "do", type => "hidden");
 972         $form->field(name => "page", type => "hidden");
 973         $form->field(name => "from", type => "hidden");
 974         $form->field(name => "password", type => "password", required => 0);
 975         $form->field(name => "confirm_password", type => "password", required => 0);
 976         $form->field(name => "email", required => 0);
 977         if ($q->param("do") ne "signin") {
 978                 $form->text("You need to log in first.");
 979         }
 980
 981         if ($form->submitted) {
 982                 # Set required fields based on how form was submitted.
 983                 my %required=(
 984                         "Login" => [qw(name password)],
 985                         "Register" => [qw(name password confirm_password email)],
 986                         "Mail Password" => [qw(name)],
 987                 );
 988                 foreach my $opt (@{$required{$form->submitted}}) {
 989                         $form->field(name => $opt, required => 1);
 990                 }
 991
 992                 # Validate password differently depending on how
 993                 # form was submitted.
 994                 if ($form->submitted eq 'Login') {
 995                         $form->field(
 996                                 name => "password",
 997                                 validate => sub {
 998                                         length $form->field("name") &&
 999                                         shift eq userinfo_get($form->field("name"), 'password');
1000                                 },
1001                         );
1002                         $form->field(name => "name", validate => '/^\w+$/');
1003                 }
1004                 else {
1005                         $form->field(name => "password", validate => 'VALUE');
1006                 }
1007                 # And make sure the entered name exists when logging
1008                 # in or sending email, and does not when registering.
1009                 if ($form->submitted eq 'Register') {
1010                         $form->field(
1011                                 name => "name",
1012                                 validate => sub {
1013                                         my $name=shift;
1014                                         length $name &&
1015                                         ! userinfo_get($name, "regdate");
1016                                 },
1017                         );
1018                 }
1019                 else {
1020                         $form->field(
1021                                 name => "name",
1022                                 validate => sub {
1023                                         my $name=shift;
1024                                         length $name &&
1025                                         userinfo_get($name, "regdate");
1026                                 },
1027                         );
1028                 }
1029         }
1030         else {
1031                 # First time settings.
1032                 $form->field(name => "name", comment => "use FirstnameLastName");
1033                 $form->field(name => "confirm_password", comment => "(only needed");
1034                 $form->field(name => "email",            comment => "for registration)");
1035                 if ($session->param("name")) {
1036                         $form->field(name => "name", value => $session->param("name"));
1037                 }
1038         }
1039
1040         if ($form->submitted && $form->validate) {
1041                 if ($form->submitted eq 'Login') {
1042                         $session->param("name", $form->field("name"));
1043                         if (defined $form->field("do") &&
1044                             $form->field("do") ne 'signin') {
1045                                 print $q->redirect(
1046                                         "$config{cgiurl}?do=".$form->field("do").
1047                                         "&page=".$form->field("page").
1048                                         "&from=".$form->field("from"));;
1049                         }
1050                         else {
1051                                 print $q->redirect($config{url});
1052                         }
1053                 }
1054                 elsif ($form->submitted eq 'Register') {
1055                         my $user_name=$form->field('name');
1056                         if (userinfo_setall($user_name, {
1057                                            'email' => $form->field('email'),
1058                                            'password' => $form->field('password'),
1059                                            'regdate' => time
1060                                          })) {
1061                                 $form->field(name => "confirm_password", type => "hidden");
1062                                 $form->field(name => "email", type => "hidden");
1063                                 $form->text("Registration successful. Now you can Login.");
1064                                 print $session->header();
1065                                 print misctemplate($form->title, $form->render(submit => ["Login"]));
1066                         }
1067                         else {
1068                                 error("Error saving registration.");
1069                         }
1070                 }
1071                 elsif ($form->submitted eq 'Mail Password') {
1072                         my $user_name=$form->field("name");
1073                         my $template=HTML::Template->new(
1074                                 filename => "$config{templatedir}/passwordmail.tmpl"
1075                         );
1076                         $template->param(
1077                                 user_name => $user_name,
1078                                 user_password => userinfo_get($user_name, "password"),
1079                                 wikiurl => $config{url},
1080                                 wikiname => $config{wikiname},
1081                                 REMOTE_ADDR => $ENV{REMOTE_ADDR},
1082                         );
1083
1084                         eval q{use Mail::Sendmail};
1085                         my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
1086                         sendmail(
1087                                 To => userinfo_get($user_name, "email"),
1088                                 From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
1089                                 Subject => "$config{wikiname} information",
1090                                 Message => $template->output,
1091                         ) or error("Failed to send mail");
1092
1093                         $form->text("Your password has been emailed to you.");
1094                         $form->field(name => "name", required => 0);
1095                         print $session->header();
1096                         print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1097                 }
1098         }
1099         else {
1100                 print $session->header();
1101                 print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
1102         }
1103 } #}}}
1104
1105 sub is_admin ($) { #{{{
1106         my $user_name=shift;
1107
1108         return grep { $_ eq $user_name } @{$config{adminuser}};
1109 } #}}}
1110
1111 sub glob_match ($$) { #{{{
1112         my $page=shift;
1113         my $glob=shift;
1114
1115         # turn glob into safe regexp
1116         $glob=quotemeta($glob);
1117         $glob=~s/\\\*/.*/g;
1118         $glob=~s/\\\?/./g;
1119         $glob=~s!\\/!/!g;
1120
1121         $page=~/^$glob$/i;
1122 } #}}}
1123
1124 sub globlist_match ($$) { #{{{
1125         my $page=shift;
1126         my @globlist=split(" ", shift);
1127
1128         # check any negated globs first
1129         foreach my $glob (@globlist) {
1130                 return 0 if $glob=~/^!(.*)/ && glob_match($page, $1);
1131         }
1132
1133         foreach my $glob (@globlist) {
1134                 return 1 if glob_match($page, $glob);
1135         }
1136
1137         return 0;
1138 } #}}}
1139
1140 sub page_locked ($$;$) { #{{{
1141         my $page=shift;
1142         my $session=shift;
1143         my $nonfatal=shift;
1144
1145         my $user=$session->param("name");
1146         return if length $user && is_admin($user);
1147
1148         foreach my $admin (@{$config{adminuser}}) {
1149                 my $locked_pages=userinfo_get($admin, "locked_pages");
1150                 if (globlist_match($page, userinfo_get($admin, "locked_pages"))) {
1151                         return 1 if $nonfatal;
1152                         error(htmllink("", $page, 1)." is locked by ".
1153                               htmllink("", $admin, 1)." and cannot be edited.");
1154                 }
1155         }
1156
1157         return 0;
1158 } #}}}
1159
1160 sub cgi_prefs ($$) { #{{{
1161         my $q=shift;
1162         my $session=shift;
1163
1164         eval q{use CGI::FormBuilder};
1165         my $form = CGI::FormBuilder->new(
1166                 title => "preferences",
1167                 fields => [qw(do name password confirm_password email locked_pages)],
1168                 header => 0,
1169                 method => 'POST',
1170                 validate => {
1171                         confirm_password => {
1172                                 perl => q{eq $form->field("password")},
1173                         },
1174                         email => 'EMAIL',
1175                 },
1176                 required => 'NONE',
1177                 javascript => 0,
1178                 params => $q,
1179                 action => $q->request_uri,
1180                 template => (-e "$config{templatedir}/prefs.tmpl" ?
1181                               "$config{templatedir}/prefs.tmpl" : "")
1182         );
1183         my @buttons=("Save Preferences", "Logout", "Cancel");
1184
1185         my $user_name=$session->param("name");
1186         $form->field(name => "do", type => "hidden");
1187         $form->field(name => "name", disabled => 1,
1188                 value => $user_name, force => 1);
1189         $form->field(name => "password", type => "password");
1190         $form->field(name => "confirm_password", type => "password");
1191         $form->field(name => "locked_pages", size => 50,
1192                 comment => "(".htmllink("", "GlobList", 1).")");
1193
1194         if (! is_admin($user_name)) {
1195                 $form->field(name => "locked_pages", type => "hidden");
1196         }
1197
1198         if (! $form->submitted) {
1199                 $form->field(name => "email", force => 1,
1200                         value => userinfo_get($user_name, "email"));
1201                 $form->field(name => "locked_pages", force => 1,
1202                         value => userinfo_get($user_name, "locked_pages"));
1203         }
1204
1205         if ($form->submitted eq 'Logout') {
1206                 $session->delete();
1207                 print $q->redirect($config{url});
1208                 return;
1209         }
1210         elsif ($form->submitted eq 'Cancel') {
1211                 print $q->redirect($config{url});
1212                 return;
1213         }
1214         elsif ($form->submitted eq "Save Preferences" && $form->validate) {
1215                 foreach my $field (qw(password email locked_pages)) {
1216                         if (length $form->field($field)) {
1217                                 userinfo_set($user_name, $field, $form->field($field)) || error("failed to set $field");
1218                         }
1219                 }
1220                 $form->text("Preferences saved.");
1221         }
1222
1223         print $session->header();
1224         print misctemplate($form->title, $form->render(submit => \@buttons));
1225 } #}}}
1226
1227 sub cgi_editpage ($$) { #{{{
1228         my $q=shift;
1229         my $session=shift;
1230
1231         eval q{use CGI::FormBuilder};
1232         my $form = CGI::FormBuilder->new(
1233                 fields => [qw(do rcsinfo from page content comments)],
1234                 header => 1,
1235                 method => 'POST',
1236                 validate => {
1237                         content => '/.+/',
1238                 },
1239                 required => [qw{content}],
1240                 javascript => 0,
1241                 params => $q,
1242                 action => $q->request_uri,
1243                 table => 0,
1244                 template => "$config{templatedir}/editpage.tmpl"
1245         );
1246         my @buttons=("Save Page", "Preview", "Cancel");
1247
1248         my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
1249         if (! defined $page || ! length $page || $page ne $q->param('page') ||
1250             $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
1251                 error("bad page name");
1252         }
1253         $page=lc($page);
1254
1255         my $file=$page.$config{default_pageext};
1256         my $newfile=1;
1257         if (exists $pagesources{lc($page)}) {
1258                 $file=$pagesources{lc($page)};
1259                 $newfile=0;
1260         }
1261
1262         $form->field(name => "do", type => 'hidden');
1263         $form->field(name => "from", type => 'hidden');
1264         $form->field(name => "rcsinfo", type => 'hidden');
1265         $form->field(name => "page", value => "$page", force => 1);
1266         $form->field(name => "comments", type => "text", size => 80);
1267         $form->field(name => "content", type => "textarea", rows => 20,
1268                 cols => 80);
1269         $form->tmpl_param("can_commit", $config{svn});
1270         $form->tmpl_param("indexlink", indexlink());
1271         $form->tmpl_param("helponformattinglink",
1272                 htmllink("", "HelpOnFormatting", 1));
1273         if (! $form->submitted) {
1274                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1275                         force => 1);
1276         }
1277
1278         if ($form->submitted eq "Cancel") {
1279                 print $q->redirect("$config{url}/".htmlpage($page));
1280                 return;
1281         }
1282         elsif ($form->submitted eq "Preview") {
1283                 $form->tmpl_param("page_preview",
1284                         htmlize($config{default_pageext},
1285                                 linkify($form->field('content'), $page)));
1286         }
1287         else {
1288                 $form->tmpl_param("page_preview", "");
1289         }
1290         $form->tmpl_param("page_conflict", "");
1291
1292         if (! $form->submitted || $form->submitted eq "Preview" ||
1293             ! $form->validate) {
1294                 if ($form->field("do") eq "create") {
1295                         if (exists $pagesources{lc($page)}) {
1296                                 # hmm, someone else made the page in the
1297                                 # meantime?
1298                                 print $q->redirect("$config{url}/".htmlpage($page));
1299                                 return;
1300                         }
1301
1302                         my @page_locs;
1303                         my $best_loc;
1304                         my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
1305                         if (! defined $from || ! length $from ||
1306                             $from ne $form->param('from') ||
1307                             $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
1308                                 @page_locs=$best_loc=$page;
1309                         }
1310                         else {
1311                                 my $dir=$from."/";
1312                                 $dir=~s![^/]+/$!!;
1313
1314                                 if ($page eq 'discussion') {
1315                                         $best_loc="$from/$page";
1316                                 }
1317                                 else {
1318                                         $best_loc=$dir.$page;
1319                                 }
1320
1321                                 push @page_locs, $dir.$page;
1322                                 push @page_locs, "$from/$page";
1323                                 while (length $dir) {
1324                                         $dir=~s![^/]+/$!!;
1325                                         push @page_locs, $dir.$page;
1326                                 }
1327
1328                                 @page_locs = grep {
1329                                         ! exists $pagesources{lc($_)} &&
1330                                         ! page_locked($_, $session, 1)
1331                                 } @page_locs;
1332                         }
1333
1334                         $form->tmpl_param("page_select", 1);
1335                         $form->field(name => "page", type => 'select',
1336                                 options => \@page_locs, value => $best_loc);
1337                         $form->title("creating $page");
1338                 }
1339                 elsif ($form->field("do") eq "edit") {
1340                         page_locked($page, $session);
1341                         if (! defined $form->field('content') ||
1342                             ! length $form->field('content')) {
1343                                 my $content="";
1344                                 if (exists $pagesources{lc($page)}) {
1345                                         $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
1346                                         $content=~s/\n/\r\n/g;
1347                                 }
1348                                 $form->field(name => "content", value => $content,
1349                                         force => 1);
1350                         }
1351                         $form->tmpl_param("page_select", 0);
1352                         $form->field(name => "page", type => 'hidden');
1353                         $form->title("editing $page");
1354                 }
1355
1356                 print $form->render(submit => \@buttons);
1357         }
1358         else {
1359                 # save page
1360                 page_locked($page, $session);
1361
1362                 my $content=$form->field('content');
1363                 $content=~s/\r\n/\n/g;
1364                 $content=~s/\r/\n/g;
1365                 writefile("$config{srcdir}/$file", $content);
1366
1367                 my $message="web commit ";
1368                 if (length $session->param("name")) {
1369                         $message.="by ".$session->param("name");
1370                 }
1371                 else {
1372                         $message.="from $ENV{REMOTE_ADDR}";
1373                 }
1374                 if (defined $form->field('comments') &&
1375                     length $form->field('comments')) {
1376                         $message.=": ".$form->field('comments');
1377                 }
1378
1379                 if ($config{svn}) {
1380                         if ($newfile) {
1381                                 rcs_add($file);
1382                         }
1383                         # prevent deadlock with post-commit hook
1384                         unlockwiki();
1385                         # presumably the commit will trigger an update
1386                         # of the wiki
1387                         my $conflict=rcs_commit($file, $message,
1388                                 $form->field("rcsinfo"));
1389
1390                         if (defined $conflict) {
1391                                 $form->field(name => "rcsinfo", value => rcs_prepedit($file),
1392                                         force => 1);
1393                                 $form->tmpl_param("page_conflict", 1);
1394                                 $form->field("content", value => $conflict, force => 1);
1395                                 $form->field("do", "edit)");
1396                                 $form->tmpl_param("page_select", 0);
1397                                 $form->field(name => "page", type => 'hidden');
1398                                 $form->title("editing $page");
1399                                 print $form->render(submit => \@buttons);
1400                                 return;
1401                         }
1402                 }
1403                 else {
1404                         loadindex();
1405                         refresh();
1406                         saveindex();
1407                 }
1408
1409                 # The trailing question mark tries to avoid broken
1410                 # caches and get the most recent version of the page.
1411                 print $q->redirect("$config{url}/".htmlpage($page)."?updated");
1412         }
1413 } #}}}
1414
1415 sub cgi () { #{{{
1416         eval q{use CGI};
1417         eval q{use CGI::Session};
1418
1419         my $q=CGI->new;
1420
1421         my $do=$q->param('do');
1422         if (! defined $do || ! length $do) {
1423                 error("\"do\" parameter missing");
1424         }
1425
1426         # This does not need a session.
1427         if ($do eq 'recentchanges') {
1428                 cgi_recentchanges($q);
1429                 return;
1430         }
1431
1432         CGI::Session->name("ikiwiki_session");
1433
1434         my $oldmask=umask(077);
1435         my $session = CGI::Session->new("driver:db_file", $q,
1436                 { FileName => "$config{wikistatedir}/sessions.db" });
1437         umask($oldmask);
1438
1439         # Everything below this point needs the user to be signed in.
1440         if ((! $config{anonok} && ! defined $session->param("name") ||
1441              ! defined $session->param("name") ||
1442              ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
1443                 cgi_signin($q, $session);
1444
1445                 # Force session flush with safe umask.
1446                 my $oldmask=umask(077);
1447                 $session->flush;
1448                 umask($oldmask);
1449
1450                 return;
1451         }
1452
1453         if ($do eq 'create' || $do eq 'edit') {
1454                 cgi_editpage($q, $session);
1455         }
1456         elsif ($do eq 'prefs') {
1457                 cgi_prefs($q, $session);
1458         }
1459         else {
1460                 error("unknown do parameter");
1461         }
1462 } #}}}
1463
1464 sub setup () { # {{{
1465         my $setup=possibly_foolish_untaint($config{setup});
1466         delete $config{setup};
1467         open (IN, $setup) || error("read $setup: $!\n");
1468         local $/=undef;
1469         my $code=<IN>;
1470         ($code)=$code=~/(.*)/s;
1471         close IN;
1472
1473         eval $code;
1474         error($@) if $@;
1475         exit;
1476 } #}}}
1477
1478 # main {{{
1479 setup() if $config{setup};
1480 lockwiki();
1481 if ($config{wrapper}) {
1482         gen_wrapper();
1483         exit;
1484 }
1485 memoize('pagename');
1486 memoize('bestlink');
1487 loadindex() unless $config{rebuild};
1488 if ($config{cgi}) {
1489         cgi();
1490 }
1491 else {
1492         rcs_update() if $config{svn};
1493         refresh();
1494         saveindex();
1495 }
1496 #}}}