add --setup, --wrappermode
[ikiwiki.git] / ikiwiki
diff --git a/ikiwiki b/ikiwiki
index 058b3ffa21e007cd0f956581e6412dc52b7884d8..4e64e4031d0d5996f68d072d4bac06e6a3aa4da4 100755 (executable)
--- a/ikiwiki
+++ b/ikiwiki
@@ -1,39 +1,72 @@
 #!/usr/bin/perl -T
+$ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
 
 use warnings;
 use strict;
-use File::Find;
 use Memoize;
 use File::Spec;
 use HTML::Template;
-
-BEGIN {
-       $blosxom::version="is a proper perl module too much to ask?";
-       do "/usr/bin/markdown";
+use Getopt::Long;
+
+my (%links, %oldlinks, %oldpagemtime, %renderedfiles, %pagesources);
+
+my %config=( #{{{
+       wiki_file_prune_regexp => qr{((^|/).svn/|\.\.|^\.|\/\.|\.html?$)},
+       wiki_link_regexp => qr/\[\[([^\s]+)\]\]/,
+       wiki_file_regexp => qr/(^[-A-Za-z0-9_.:\/+]+$)/,
+       verbose => 0,
+       wikiname => "wiki",
+       default_pageext => ".mdwn",
+       cgi => 0,
+       svn => 1,
+       url => '',
+       cgiurl => '',
+       historyurl => '',
+       anonok => 0,
+       rebuild => 0,
+       wrapper => undef,
+       wrappermode => undef,
+       srcdir => undef,
+       destdir => undef,
+       templatedir => undef,
+       setup => undef,
+); #}}}
+
+GetOptions( #{{{
+       "setup=s" => \$config{setup},
+       "wikiname=s" => \$config{wikiname},
+       "verbose|v!" => \$config{verbose},
+       "rebuild!" => \$config{rebuild},
+       "wrapper=s" => sub { $config{wrapper}=$_[1] ? $_[1] : "ikiwiki-wrap" },
+       "wrappermode=i" => \$config{wrappermode},
+       "svn!" => \$config{svn},
+       "anonok!" => \$config{anonok},
+       "cgi!" => \$config{cgi},
+       "url=s" => \$config{url},
+       "cgiurl=s" => \$config{cgiurl},
+       "historyurl=s" => \$config{historyurl},
+       "exclude=s@" => sub {
+               $config{wiki_file_prune_regexp}=qr/$config{wiki_file_prune_regexp}|$_[1]/;
+       },
+) || usage();
+
+if (! $config{setup}) {
+       usage() unless @ARGV == 3;
+       $config{srcdir} = possibly_foolish_untaint(shift);
+       $config{templatedir} = possibly_foolish_untaint(shift);
+       $config{destdir} = possibly_foolish_untaint(shift);
+       if ($config{cgi} && ! length $config{url}) {
+               error("Must specify url to wiki with --url when using --cgi");
+       }
 }
-
-$ENV{PATH}="/usr/local/bin:/usr/bin:/bin";
-my ($srcdir, $templatedir, $destdir, %links, %oldlinks, %oldpagemtime,
-    %renderedfiles, %pagesources);
-my $wiki_link_regexp=qr/\[\[([^\s]+)\]\]/;
-my $wiki_file_regexp=qr/(^[-A-Za-z0-9_.:\/+]+$)/;
-my $wiki_file_prune_regexp=qr!((^|/).svn/|\.\.|^\.|\/\.|\.html?$)!;
-my $verbose=0;
-my $wikiname="wiki";
-my $default_pagetype=".mdwn";
-my $cgi=0;
-my $url="";
-my $cgiurl="";
-my $historyurl="";
-my $svn=1;
-my $anonok=0;
+#}}}
 
 sub usage { #{{{
        die "usage: ikiwiki [options] source templates dest\n";
 } #}}}
 
-sub error ($) { #{{{
-       if ($cgi) {
+sub error { #{{{
+       if ($config{cgi}) {
                print "Content-type: text/html\n\n";
                print misctemplate("Error", "<p>Error: @_</p>");
                exit 1;
@@ -44,11 +77,12 @@ sub error ($) { #{{{
 } #}}}
 
 sub debug ($) { #{{{
-       if (! $cgi) {
-               print "@_\n" if $verbose;
+       return unless $config{verbose};
+       if (! $config{cgi}) {
+               print "@_\n";
        }
        else {
-               print STDERR "@_\n" if $verbose;
+               print STDERR "@_\n";
        }
 } #}}}
 
@@ -58,7 +92,7 @@ sub mtime ($) { #{{{
        return (stat($page))[9];
 } #}}}
 
-sub possibly_foolish_untaint ($) { #{{{
+sub possibly_foolish_untaint { #{{{
        my $tainted=shift;
        my ($untainted)=$tainted=~/(.*)/;
        return $untainted;
@@ -138,17 +172,18 @@ sub findlinks ($) { #{{{
        my $content=shift;
 
        my @links;
-       while ($content =~ /$wiki_link_regexp/g) {
+       while ($content =~ /$config{wiki_link_regexp}/g) {
                push @links, lc($1);
        }
        return @links;
 } #}}}
 
-# Given a page and the text of a link on the page, determine which existing
-# page that link best points to. Prefers pages under a subdirectory with
-# the same name as the source page, failing that goes down the directory tree
-# to the base looking for matching pages.
 sub bestlink ($$) { #{{{
+       # Given a page and the text of a link on the page, determine which
+       # existing page that link best points to. Prefers pages under a
+       # subdirectory with the same name as the source page, failing that
+       # goes down the directory tree to the base looking for matching
+       # pages.
        my $page=shift;
        my $link=lc(shift);
        
@@ -177,11 +212,12 @@ sub isinlinableimage ($) { #{{{
 sub htmllink { #{{{
        my $page=shift;
        my $link=shift;
-       my $noimagelink=shift;
+       my $noimageinline=shift; # don't turn links into inline html images
+       my $createsubpage=shift; # force creation of a subpage if page DNE
 
        my $bestlink=bestlink($page, $link);
 
-       return $link if $page eq $bestlink;
+       return $link if length $bestlink && $page eq $bestlink;
        
        # TODO BUG: %renderedfiles may not have it, if the linked to page
        # was also added and isn't yet rendered! Note that this bug is
@@ -191,12 +227,17 @@ sub htmllink { #{{{
                $bestlink=htmlpage($bestlink);
        }
        if (! grep { $_ eq $bestlink } values %renderedfiles) {
-               return "<a href=\"$cgiurl?do=create&page=$link&from=$page\">?</a>$link"
+               if (! $createsubpage) {
+                       return "<a href=\"$config{cgiurl}?do=create&page=$link&from=$page\">?</a>$link"
+               }
+               else {
+                       return "<a href=\"$config{cgiurl}?do=create&page=$page/$link\">?</a>$link"
+               }
        }
        
        $bestlink=File::Spec->abs2rel($bestlink, dirname($page));
        
-       if (! $noimagelink && isinlinableimage($bestlink)) {
+       if (! $noimageinline && isinlinableimage($bestlink)) {
                return "<img src=\"$bestlink\">";
        }
        return "<a href=\"$bestlink\">$link</a>";
@@ -206,7 +247,7 @@ sub linkify ($$) { #{{{
        my $content=shift;
        my $file=shift;
 
-       $content =~ s/$wiki_link_regexp/htmllink(pagename($file), $1)/eg;
+       $content =~ s/$config{wiki_link_regexp}/htmllink(pagename($file), $1)/eg;
        
        return $content;
 } #}}}
@@ -215,6 +256,13 @@ sub htmlize ($$) { #{{{
        my $type=shift;
        my $content=shift;
        
+       if (! $INC{"/usr/bin/markdown"}) {
+               no warnings 'once';
+               $blosxom::version="is a proper perl module too much to ask?";
+               use warnings 'all';
+               do "/usr/bin/markdown";
+       }
+       
        if ($type eq '.mdwn') {
                return Markdown::Markdown($content);
        }
@@ -264,14 +312,14 @@ sub parentlinks ($) { #{{{
                }
                $path.="../";
        }
-       unshift @ret, { url => $path , page => $wikiname };
+       unshift @ret, { url => $path , page => $config{wikiname} };
        return @ret;
 } #}}}
 
 sub indexlink () { #{{{
-       return "<a href=\"$url\">$wikiname</a>";
+       return "<a href=\"$config{url}\">$config{wikiname}</a>";
 } #}}}
-       
+
 sub finalize ($$) { #{{{
        my $content=shift;
        my $page=shift;
@@ -280,37 +328,52 @@ sub finalize ($$) { #{{{
        $title=~s/_/ /g;
        
        my $template=HTML::Template->new(blind_cache => 1,
-               filename => "$templatedir/page.tmpl");
+               filename => "$config{templatedir}/page.tmpl");
        
-       if (length $cgiurl) {
-               $template->param(editurl => "$cgiurl?do=edit&page=$page");
-               if ($svn) {
-                       $template->param(recentchangesurl => "$cgiurl?do=recentchanges");
+       if (length $config{cgiurl}) {
+               $template->param(editurl => "$config{cgiurl}?do=edit&page=$page");
+               if ($config{svn}) {
+                       $template->param(recentchangesurl => "$config{cgiurl}?do=recentchanges");
                }
        }
 
-       if (length $historyurl) {
-               my $u=$historyurl;
+       if (length $config{historyurl}) {
+               my $u=$config{historyurl};
                $u=~s/\[\[\]\]/$pagesources{$page}/g;
                $template->param(historyurl => $u);
        }
        
        $template->param(
                title => $title,
-               wikiname => $wikiname,
+               wikiname => $config{wikiname},
                parentlinks => [parentlinks($page)],
                content => $content,
                backlinks => [backlinks($page)],
+               discussionlink => htmllink($page, "Discussion", 1, 1),
        );
        
        return $template->output;
 } #}}}
 
+sub check_overwrite ($$) { #{{{
+       # Important security check. Make sure to call this before saving
+       # any files to the source directory.
+       my $dest=shift;
+       my $src=shift;
+       
+       if (! exists $renderedfiles{$src} && -e $dest && ! $config{rebuild}) {
+               error("$dest exists and was rendered from ".
+                       join(" ",(grep { $renderedfiles{$_} eq $dest } keys
+                               %renderedfiles)).
+                       ", not from $src before not overwriting");
+       }
+} #}}}
+               
 sub render ($) { #{{{
        my $file=shift;
        
        my $type=pagetype($file);
-       my $content=readfile("$srcdir/$file");
+       my $content=readfile("$config{srcdir}/$file");
        if ($type ne 'unknown') {
                my $page=pagename($file);
                
@@ -320,20 +383,22 @@ sub render ($) { #{{{
                $content=htmlize($type, $content);
                $content=finalize($content, $page);
                
-               writefile("$destdir/".htmlpage($page), $content);
+               check_overwrite("$config{destdir}/".htmlpage($page), $page);
+               writefile("$config{destdir}/".htmlpage($page), $content);
                $oldpagemtime{$page}=time;
                $renderedfiles{$page}=htmlpage($page);
        }
        else {
                $links{$file}=[];
-               writefile("$destdir/$file", $content);
+               check_overwrite("$config{destdir}/$file", $file);
+               writefile("$config{destdir}/$file", $content);
                $oldpagemtime{$file}=time;
                $renderedfiles{$file}=$file;
        }
 } #}}}
 
 sub loadindex () { #{{{
-       open (IN, "$srcdir/.ikiwiki/index") || return;
+       open (IN, "$config{srcdir}/.ikiwiki/index") || return;
        while (<IN>) {
                $_=possibly_foolish_untaint($_);
                chomp;
@@ -349,10 +414,10 @@ sub loadindex () { #{{{
 } #}}}
 
 sub saveindex () { #{{{
-       if (! -d "$srcdir/.ikiwiki") {
-               mkdir("$srcdir/.ikiwiki");
+       if (! -d "$config{srcdir}/.ikiwiki") {
+               mkdir("$config{srcdir}/.ikiwiki");
        }
-       open (OUT, ">$srcdir/.ikiwiki/index") || error("cannot write to index: $!");
+       open (OUT, ">$config{srcdir}/.ikiwiki/index") || error("cannot write to index: $!");
        foreach my $page (keys %oldpagemtime) {
                print OUT "$oldpagemtime{$page} $pagesources{$page} $renderedfiles{$page} ".
                        join(" ", @{$links{$page}})."\n"
@@ -362,8 +427,8 @@ sub saveindex () { #{{{
 } #}}}
 
 sub rcs_update () { #{{{
-       if (-d "$srcdir/.svn") {
-               if (system("svn", "update", "--quiet", $srcdir) != 0) {
+       if (-d "$config{srcdir}/.svn") {
+               if (system("svn", "update", "--quiet", $config{srcdir}) != 0) {
                        warn("svn update failed\n");
                }
        }
@@ -372,9 +437,10 @@ sub rcs_update () { #{{{
 sub rcs_commit ($) { #{{{
        my $message=shift;
 
-       if (-d "$srcdir/.svn") {
+       if (-d "$config{srcdir}/.svn") {
                if (system("svn", "commit", "--quiet", "-m",
-                          possibly_foolish_untaint($message), $srcdir) != 0) {
+                          possibly_foolish_untaint($message),
+                          $config{srcdir}) != 0) {
                        warn("svn commit failed\n");
                }
        }
@@ -383,14 +449,14 @@ sub rcs_commit ($) { #{{{
 sub rcs_add ($) { #{{{
        my $file=shift;
 
-       if (-d "$srcdir/.svn") {
+       if (-d "$config{srcdir}/.svn") {
                my $parent=dirname($file);
-               while (! -d "$srcdir/$parent/.svn") {
+               while (! -d "$config{srcdir}/$parent/.svn") {
                        $file=$parent;
                        $parent=dirname($file);
                }
                
-               if (system("svn", "add", "--quiet", "$srcdir/$file") != 0) {
+               if (system("svn", "add", "--quiet", "$config{srcdir}/$file") != 0) {
                        warn("svn add failed\n");
                }
        }
@@ -403,8 +469,8 @@ sub rcs_recentchanges ($) { #{{{
        eval q{use Date::Parse};
        eval q{use Time::Duration};
        
-       if (-d "$srcdir/.svn") {
-               my $info=`LANG=C svn info $srcdir`;
+       if (-d "$config{srcdir}/.svn") {
+               my $info=`LANG=C svn info $config{srcdir}`;
                my ($svn_url)=$info=~/^URL: (.*)$/m;
 
                # FIXME: currently assumes that the wiki is somewhere
@@ -433,7 +499,19 @@ sub rcs_recentchanges ($) { #{{{
                                $state='body';
                        }
                        elsif ($state eq 'body' && /$div/) {
-                               push @ret, { rev => $rev, user => $user,
+                               my $committype="web";
+                               if (defined $message[0] &&
+                                   $message[0]->{line}=~/^web commit by (\w+):?(.*)/) {
+                                       $user="$1";
+                                       $message[0]->{line}=$2;
+                               }
+                               else {
+                                       $committype="svn";
+                               }
+                               
+                               push @ret, { rev => $rev,
+                                       user => htmllink("", $user, 1),
+                                       committype => $committype,
                                        when => $when, message => [@message],
                                        pages => [@pages] } if @pages;
                                return @ret if @ret >= $num;
@@ -465,25 +543,29 @@ sub refresh () { #{{{
        # Find existing pages.
        my %exists;
        my @files;
+       
+       eval q{use File::Find};
        find({
                no_chdir => 1,
                wanted => sub {
-                       if (/$wiki_file_prune_regexp/) {
+                       if (/$config{wiki_file_prune_regexp}/) {
+                               no warnings 'once';
                                $File::Find::prune=1;
+                               use warnings "all";
                        }
                        elsif (! -d $_) {
-                               my ($f)=/$wiki_file_regexp/; # untaint
+                               my ($f)=/$config{wiki_file_regexp}/; # untaint
                                if (! defined $f) {
                                        warn("skipping bad filename $_\n");
                                }
                                else {
-                                       $f=~s/^\Q$srcdir\E\/?//;
+                                       $f=~s/^\Q$config{srcdir}\E\/?//;
                                        push @files, $f;
                                        $exists{pagename($f)}=1;
                                }
                        }
                },
-       }, $srcdir);
+       }, $config{srcdir});
 
        my %rendered;
 
@@ -503,7 +585,7 @@ sub refresh () { #{{{
                if (! $exists{$page}) {
                        debug("removing old page $page");
                        push @del, $renderedfiles{$page};
-                       prune($destdir."/".$renderedfiles{$page});
+                       prune($config{destdir}."/".$renderedfiles{$page});
                        delete $renderedfiles{$page};
                        $oldpagemtime{$page}=0;
                        delete $pagesources{$page};
@@ -515,7 +597,7 @@ sub refresh () { #{{{
                my $page=pagename($file);
                
                if (! exists $oldpagemtime{$page} ||
-                   mtime("$srcdir/$file") > $oldpagemtime{$page}) {
+                   mtime("$config{srcdir}/$file") > $oldpagemtime{$page}) {
                        debug("rendering changed file $file");
                        render($file);
                        $rendered{$file}=1;
@@ -584,29 +666,31 @@ FILE:             foreach my $file (@files) {
        }
 } #}}}
 
-# Generates a C wrapper program for running ikiwiki in a specific way.
-# The wrapper may be safely made suid.
-sub gen_wrapper ($$) { #{{{
-       my ($svn, $rebuild)=@_;
-
+sub gen_wrapper (@) { #{{{
+       my %config=(@_);
        eval q{use Cwd 'abs_path'};
-       $srcdir=abs_path($srcdir);
-       $destdir=abs_path($destdir);
+       $config{srcdir}=abs_path($config{srcdir});
+       $config{destdir}=abs_path($config{destdir});
        my $this=abs_path($0);
        if (! -x $this) {
                error("$this doesn't seem to be executable");
        }
 
-       my @params=($srcdir, $templatedir, $destdir, "--wikiname=$wikiname");
-       push @params, "--verbose" if $verbose;
-       push @params, "--rebuild" if $rebuild;
-       push @params, "--nosvn" if !$svn;
-       push @params, "--cgi" if $cgi;
-       push @params, "--url=$url" if $url;
-       push @params, "--cgiurl=$cgiurl" if $cgiurl;
-       push @params, "--historyurl=$historyurl" if $historyurl;
-       push @params, "--anonok" if $anonok;
-       my $params=join(" ", @params);
+       if ($config{setup}) {
+               error("cannot create a wrapper that uses a setup file");
+       }
+       
+       my @params=($config{srcdir}, $config{templatedir}, $config{destdir},
+               "--wikiname=$config{wikiname}");
+       push @params, "--verbose" if $config{verbose};
+       push @params, "--rebuild" if $config{rebuild};
+       push @params, "--nosvn" if !$config{svn};
+       push @params, "--cgi" if $config{cgi};
+       push @params, "--url=$config{url}" if length $config{url};
+       push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
+       push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
+       push @params, "--anonok" if $config{anonok};
+       my $params=join(" ", map { "\'$_\'" } @params);
        my $call='';
        foreach my $p ($this, $this, @params) {
                $call.=qq{"$p", };
@@ -616,7 +700,7 @@ sub gen_wrapper ($$) { #{{{
        my @envsave;
        push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
                       CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
-                      HTTP_COOKIE} if $cgi;
+                      HTTP_COOKIE} if $config{cgi};
        my $envsave="";
        foreach my $var (@envsave) {
                $envsave.=<<"EOF"
@@ -657,12 +741,15 @@ $envsave
 }
 EOF
        close OUT;
-       if (system("gcc", "ikiwiki-wrap.c", "-o", "ikiwiki-wrap") != 0) {
+       if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
                error("failed to compile ikiwiki-wrap.c");
        }
        unlink("ikiwiki-wrap.c");
-       print "successfully generated ikiwiki-wrap\n";
-       exit 0;
+       if (defined $config{wrappermode} &&
+           ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
+               error("chmod $config{wrapper}: $!");
+       }
+       print "successfully generated $config{wrapper}\n";
 } #}}}
                
 sub misctemplate ($$) { #{{{
@@ -670,12 +757,12 @@ sub misctemplate ($$) { #{{{
        my $pagebody=shift;
        
        my $template=HTML::Template->new(
-               filename => "$templatedir/misc.tmpl"
+               filename => "$config{templatedir}/misc.tmpl"
        );
        $template->param(
                title => $title,
                indexlink => indexlink(),
-               wikiname => $wikiname,
+               wikiname => $config{wikiname},
                pagebody => $pagebody,
        );
        return $template->output;
@@ -685,29 +772,57 @@ sub cgi_recentchanges ($) { #{{{
        my $q=shift;
        
        my $template=HTML::Template->new(
-               filename => "$templatedir/recentchanges.tmpl"
+               filename => "$config{templatedir}/recentchanges.tmpl"
        );
        $template->param(
                title => "RecentChanges",
                indexlink => indexlink(),
-               wikiname => $wikiname,
+               wikiname => $config{wikiname},
                changelog => [rcs_recentchanges(100)],
        );
        print $q->header, $template->output;
 } #}}}
 
+sub userinfo_get ($$) { #{{{
+       my $user=shift;
+       my $field=shift;
+
+       eval q{use Storable};
+       my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
+       if (! defined $userdata || ! ref $userdata || 
+           ! exists $userdata->{$user} || ! ref $userdata->{$user}) {
+               return "";
+       }
+       return $userdata->{$user}->{$field};
+} #}}}
+
+sub userinfo_set ($$) { #{{{
+       my $user=shift;
+       my $info=shift;
+       
+       eval q{use Storable};
+       my $userdata=eval{ Storable::lock_retrieve("$config{srcdir}/.ikiwiki/userdb") };
+       if (! defined $userdata || ! ref $userdata) {
+               $userdata={};
+       }
+       $userdata->{$user}=$info;
+       my $oldmask=umask(077);
+       my $ret=Storable::lock_store($userdata, "$config{srcdir}/.ikiwiki/userdb");
+       umask($oldmask);
+       return $ret;
+} #}}}
+
 sub cgi_signin ($$) { #{{{
        my $q=shift;
        my $session=shift;
 
        eval q{use CGI::FormBuilder};
        my $form = CGI::FormBuilder->new(
-               title => "$wikiname signin",
-               fields => [qw(do page name password confirm_password email)],
+               title => "$config{wikiname} signin",
+               fields => [qw(do page from name password confirm_password email)],
                header => 1,
                method => 'POST',
                validate => {
-                       name => '/^\w+$/',
                        confirm_password => {
                                perl => q{eq $form->field("password")},
                        },
@@ -718,18 +833,17 @@ sub cgi_signin ($$) { #{{{
                params => $q,
                action => $q->request_uri,
                header => 0,
-               template => (-e "$templatedir/signin.tmpl" ? "$templatedir/signin.tmpl" : "")
+               template => (-e "$config{templatedir}/signin.tmpl" ?
+                             "$config{templatedir}/signin.tmpl" : "")
        );
        
        $form->field(name => "name", required => 0);
        $form->field(name => "do", type => "hidden");
        $form->field(name => "page", type => "hidden");
+       $form->field(name => "from", type => "hidden");
        $form->field(name => "password", type => "password", required => 0);
        $form->field(name => "confirm_password", type => "password", required => 0);
        $form->field(name => "email", required => 0);
-       if ($session->param("name")) {
-               $form->field(name => "name", value => $session->param("name"));
-       }
        if ($q->param("do") ne "signin") {
                $form->text("You need to log in before you can edit pages.");
        }
@@ -745,26 +859,52 @@ sub cgi_signin ($$) { #{{{
                        $form->field(name => $opt, required => 1);
                }
        
-               # Validate password differently depending on how form was
-               # submitted.
+               # Validate password differently depending on how
+               # form was submitted.
                if ($form->submitted eq 'Login') {
                        $form->field(
                                name => "password",
                                validate => sub {
-                                       # TODO get real user password
-                                       shift eq "foo";
+                                       length $form->field("name") &&
+                                       shift eq userinfo_get($form->field("name"), 'password');
                                },
                        );
+                       $form->field(name => "name", validate => '/^\w+$/');
                }
                else {
                        $form->field(name => "password", validate => 'VALUE');
                }
+               # And make sure the entered name exists when logging
+               # in or sending email, and does not when registering.
+               if ($form->submitted eq 'Register') {
+                       $form->field(
+                               name => "name",
+                               validate => sub {
+                                       my $name=shift;
+                                       length $name &&
+                                       ! userinfo_get($name, "regdate");
+                               },
+                       );
+               }
+               else {
+                       $form->field(
+                               name => "name",
+                               validate => sub {
+                                       my $name=shift;
+                                       length $name &&
+                                       userinfo_get($name, "regdate");
+                               },
+                       );
+               }
        }
        else {
-               # Comments only shown first time.
+               # First time settings.
                $form->field(name => "name", comment => "use FirstnameLastName");
                $form->field(name => "confirm_password", comment => "(only needed");
                $form->field(name => "email",            comment => "for registration)");
+               if ($session->param("name")) {
+                       $form->field(name => "name", value => $session->param("name"));
+               }
        }
 
        if ($form->submitted && $form->validate) {
@@ -773,24 +913,55 @@ sub cgi_signin ($$) { #{{{
                        if (defined $form->field("do") && 
                            $form->field("do") ne 'signin') {
                                print $q->redirect(
-                                       "$cgiurl?do=".$form->field("do").
-                                       "&page=".$form->field("page"));
+                                       "$config{cgiurl}?do=".$form->field("do").
+                                       "&page=".$form->field("page").
+                                       "&from=".$form->field("from"));;
                        }
                        else {
-                               print $q->redirect($url);
+                               print $q->redirect($config{url});
                        }
                }
                elsif ($form->submitted eq 'Register') {
-                       # TODO: save registration info
-                       $form->field(name => "confirm_password", type => "hidden");
-                       $form->field(name => "email", type => "hidden");
-                       $form->text("Registration successful. Now you can Login.");
-                       print $session->header();
-                       print misctemplate($form->title, $form->render(submit => ["Login"]));
+                       my $user_name=$form->field('name');
+                       if (userinfo_set($user_name, {
+                                          'email' => $form->field('email'),
+                                          'password' => $form->field('password'),
+                                          'regdate' => time
+                                        })) {
+                               $form->field(name => "confirm_password", type => "hidden");
+                               $form->field(name => "email", type => "hidden");
+                               $form->text("Registration successful. Now you can Login.");
+                               print $session->header();
+                               print misctemplate($form->title, $form->render(submit => ["Login"]));
+                       }
+                       else {
+                               error("Error saving registration.");
+                       }
                }
                elsif ($form->submitted eq 'Mail Password') {
-                       # TODO mail password
+                       my $user_name=$form->field("name");
+                       my $template=HTML::Template->new(
+                               filename => "$config{templatedir}/passwordmail.tmpl"
+                       );
+                       $template->param(
+                               user_name => $user_name,
+                               user_password => userinfo_get($user_name, "password"),
+                               wikiurl => $config{url},
+                               wikiname => $config{wikiname},
+                               REMOTE_ADDR => $ENV{REMOTE_ADDR},
+                       );
+                       
+                       eval q{use Mail::Sendmail};
+                       my ($fromhost) = $config{cgiurl} =~ m!/([^/]+)!;
+                       sendmail(
+                               To => userinfo_get($user_name, "email"),
+                               From => "$config{wikiname} admin <".(getpwuid($>))[0]."@".$fromhost.">",
+                               Subject => "$config{wikiname} information",
+                               Message => $template->output,
+                       ) or error("Failed to send mail");
+                       
                        $form->text("Your password has been emailed to you.");
+                       $form->field(name => "name", required => 0);
                        print $session->header();
                        print misctemplate($form->title, $form->render(submit => ["Login", "Register", "Mail Password"]));
                }
@@ -810,18 +981,20 @@ sub cgi_editpage ($$) { #{{{
                fields => [qw(do from page content comments)],
                header => 1,
                method => 'POST',
-               validate => {},
-               required => [qw{}],
+               validate => {
+                       content => '/.+/',
+               },
+               required => [qw{content}],
                javascript => 0,
                params => $q,
                action => $q->request_uri,
                table => 0,
-               template => "$templatedir/editpage.tmpl"
+               template => "$config{templatedir}/editpage.tmpl"
        );
        
-       my ($page)=$form->param('page')=~/$wiki_file_regexp/;
+       my ($page)=$form->param('page')=~/$config{wiki_file_regexp}/;
        if (! defined $page || ! length $page || $page ne $q->param('page') ||
-           $page=~/$wiki_file_prune_regexp/ || $page=~/^\//) {
+           $page=~/$config{wiki_file_prune_regexp}/ || $page=~/^\//) {
                error("bad page name");
        }
        $page=lc($page);
@@ -833,20 +1006,24 @@ sub cgi_editpage ($$) { #{{{
        $form->field(name => "content", type => "textarea", rows => 20,
                cols => 80);
        
+       if ($form->submitted eq "Cancel") {
+               print $q->redirect("$config{url}/".htmlpage($page));
+               return;
+       }
        if (! $form->submitted || ! $form->validate) {
                if ($form->field("do") eq "create") {
                        if (exists $pagesources{lc($page)}) {
                                # hmm, someone else made the page in the
                                # meantime?
-                               print $q->redirect("$url/".htmlpage($page));
+                               print $q->redirect("$config{url}/".htmlpage($page));
                                return;
                        }
                        
                        my @page_locs;
-                       my ($from)=$form->param('from')=~/$wiki_file_regexp/;
+                       my ($from)=$form->param('from')=~/$config{wiki_file_regexp}/;
                        if (! defined $from || ! length $from ||
                            $from ne $form->param('from') ||
-                           $from=~/$wiki_file_prune_regexp/ || $from=~/^\//) {
+                           $from=~/$config{wiki_file_prune_regexp}/ || $from=~/^\//) {
                                @page_locs=$page;
                        }
                        else {
@@ -868,7 +1045,7 @@ sub cgi_editpage ($$) { #{{{
                elsif ($form->field("do") eq "edit") {
                        my $content="";
                        if (exists $pagesources{lc($page)}) {
-                               $content=readfile("$srcdir/$pagesources{lc($page)}");
+                               $content=readfile("$config{srcdir}/$pagesources{lc($page)}");
                                $content=~s/\n/\r\n/g;
                        }
                        $form->tmpl_param("page_select", 0);
@@ -878,13 +1055,13 @@ sub cgi_editpage ($$) { #{{{
                        $form->title("editing $page");
                }
                
-               $form->tmpl_param("can_commit", $svn);
+               $form->tmpl_param("can_commit", $config{svn});
                $form->tmpl_param("indexlink", indexlink());
-               print $form->render(submit => ["Save Page"]);
+               print $form->render(submit => ["Save Page", "Cancel"]);
        }
        else {
                # save page
-               my $file=$page.$default_pagetype;
+               my $file=$page.$config{default_pageext};
                my $newfile=1;
                if (exists $pagesources{lc($page)}) {
                        $file=$pagesources{lc($page)};
@@ -894,7 +1071,7 @@ sub cgi_editpage ($$) { #{{{
                my $content=$form->field('content');
                $content=~s/\r\n/\n/g;
                $content=~s/\r/\n/g;
-               writefile("$srcdir/$file", $content);
+               writefile("$config{srcdir}/$file", $content);
                
                my $message="web commit ";
                if ($session->param("name")) {
@@ -903,11 +1080,12 @@ sub cgi_editpage ($$) { #{{{
                else {
                        $message.="from $ENV{REMOTE_ADDR}";
                }
-               if (length $form->field('comments')) {
+               if (defined $form->field('comments') &&
+                   length $form->field('comments')) {
                        $message.=": ".$form->field('comments');
                }
                
-               if ($svn) {
+               if ($config{svn}) {
                        if ($newfile) {
                                rcs_add($file);
                        }
@@ -919,7 +1097,9 @@ sub cgi_editpage ($$) { #{{{
                        refresh();
                }
                
-               print $q->redirect("$url/".htmlpage($page));
+               # The trailing question mark tries to avoid broken
+               # caches and get the most recent version of the page.
+               print $q->redirect("$config{url}/".htmlpage($page)."?updated");
        }
 } #}}}
 
@@ -941,12 +1121,22 @@ sub cgi () { #{{{
        }
        
        CGI::Session->name("ikiwiki_session");
-       my $session = CGI::Session->new(undef, $q,
-               { Directory=> "$srcdir/.ikiwiki/sessions" });
+
+       my $oldmask=umask(077);
+       my $session = CGI::Session->new("driver:db_file", $q,
+               { FileName => "$config{srcdir}/.ikiwiki/sessions.db" });
+       umask($oldmask);
        
        # Everything below this point needs the user to be signed in.
-       if ((! $anonok && ! defined $session->param("name")) || $do eq 'signin') {
+       if ((! $config{anonok} && ! defined $session->param("name") ||
+               ! userinfo_get($session->param("name"), "regdate")) || $do eq 'signin') {
                cgi_signin($q, $session);
+       
+               # Force session flush with safe umask.
+               my $oldmask=umask(077);
+               $session->flush;
+               umask($oldmask);
+               
                return;
        }
        
@@ -958,42 +1148,33 @@ sub cgi () { #{{{
        }
 } #}}}
 
-# main {{{
-my $rebuild=0;
-my $wrapper=0;
-if (grep /^-/, @ARGV) {
-       eval {use Getopt::Long};
-       GetOptions(
-               "wikiname=s" => \$wikiname,
-               "verbose|v" => \$verbose,
-               "rebuild" => \$rebuild,
-               "wrapper" => \$wrapper,
-               "svn!" => \$svn,
-               "anonok!" => \$anonok,
-               "cgi" => \$cgi,
-               "url=s" => \$url,
-               "cgiurl=s" => \$cgiurl,
-               "historyurl=s" => \$historyurl,
-       ) || usage();
-}
-usage() unless @ARGV == 3;
-($srcdir) = possibly_foolish_untaint(shift);
-($templatedir) = possibly_foolish_untaint(shift);
-($destdir) = possibly_foolish_untaint(shift);
+sub setup () { # {{{
+       my $setup=possibly_foolish_untaint($config{setup});
+       open (IN, $setup) || error("read $setup: $!\n");
+       local $/=undef;
+       my $code=<IN>;
+       ($code)=$code=~/(.*)/s;
+       close IN;
+       eval $code;
+       error($@) if $@;
+       print "ikiwiki setup complete\n";
+       exit;
+} #}}}
 
-if ($cgi && ! length $url) {
-       error("Must specify url to wiki with --url when using --cgi");
+# main {{{
+setup() if $config{setup};
+if ($config{wrapper}) {
+       gen_wrapper(%config);
+       exit;
 }
-
-gen_wrapper($svn, $rebuild) if $wrapper;
 memoize('pagename');
 memoize('bestlink');
-loadindex() unless $rebuild;
-if ($cgi) {
+loadindex() unless $config{rebuild};
+if ($config{cgi}) {
        cgi();
 }
 else {
-       rcs_update() if $svn;
+       rcs_update() if $config{svn};
        refresh();
        saveindex();
 }