+
+ # handle linkbacks; if a page has added/removed links, update the
+ # pages it links to
+ # TODO: inefficient; pages may get rendered above and again here;
+ # problem is the linkbacks could be wrong in the first pass render
+ # above
+ if (%rendered) {
+ my %linkchanged;
+ foreach my $file (keys %rendered, @del) {
+ my $page=pagename($file);
+ if (exists $links{$page}) {
+ foreach my $link (@{$links{$page}}) {
+ $link=bestlink($page, $link);
+ if (length $link &&
+ ! exists $oldlinks{$page} ||
+ ! grep { $_ eq $link } @{$oldlinks{$page}}) {
+ $linkchanged{$link}=1;
+ }
+ }
+ }
+ if (exists $oldlinks{$page}) {
+ foreach my $link (@{$oldlinks{$page}}) {
+ $link=bestlink($page, $link);
+ if (length $link &&
+ ! exists $links{$page} ||
+ ! grep { $_ eq $link } @{$links{$page}}) {
+ $linkchanged{$link}=1;
+ }
+ }
+ }
+ }
+ foreach my $link (keys %linkchanged) {
+ my $linkfile=$pagesources{$link};
+ if (defined $linkfile) {
+ debug("rendering $linkfile, to update its linkbacks");
+ render($linkfile);
+ }
+ }
+ }
+}
+
+# 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)=@_;
+
+ eval q{use Cwd 'abs_path'};
+ $srcdir=abs_path($srcdir);
+ $destdir=abs_path($destdir);
+ my $this=abs_path($0);
+ if (! -x $this) {
+ error("$this doesn't seem to be executable");
+ }
+
+ my @params=($srcdir, $destdir, "--wikiname=$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;
+ my $params=join(" ", @params);
+ my $call='';
+ foreach my $p ($this, $this, @params) {
+ $call.=qq{"$p", };
+ }
+ $call.="NULL";
+
+ my @envsave;
+ push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
+ CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE} if $cgi;
+ my $envsave="";
+ foreach my $var (@envsave) {
+ $envsave.=<<"EOF"
+ if ((s=getenv("$var")))
+ asprintf(&newenviron[i++], "%s=%s", "$var", s);
+EOF
+ }
+
+ open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
+ print OUT <<"EOF";
+/* A wrapper for ikiwiki, can be safely made suid. */
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+extern char **environ;
+
+int main (int argc, char **argv) {
+ /* Sanitize environment. */
+ char *s;
+ char *newenviron[$#envsave+3];
+ int i=0;
+$envsave
+ newenviron[i++]="HOME=$ENV{HOME}";
+ newenviron[i]=NULL;
+ environ=newenviron;
+
+ if (argc == 2 && strcmp(argv[1], "--params") == 0) {
+ printf("$params\\n");
+ exit(0);
+ }
+
+ execl($call);
+ perror("failed to run $this");
+ exit(1);
+}
+EOF
+ close OUT;
+ if (system("gcc", "ikiwiki-wrap.c", "-o", "ikiwiki-wrap") != 0) {
+ error("failed to compile ikiwiki-wrap.c");
+ }
+ unlink("ikiwiki-wrap.c");
+ print "successfully generated ikiwiki-wrap\n";
+ exit 0;
+}
+
+sub cgi () {
+ eval q{use CGI};
+ my $q=CGI->new;
+
+ my $do=$q->param('do');
+ if (! defined $do || ! length $do) {
+ error("\"do\" parameter missing");
+ }
+
+ if ($do eq 'recentchanges') {
+ my $list="<ul>\n";
+ foreach my $change (rcs_recentchanges(100)) {
+ $list.="<li>";
+ foreach my $page (@{$change->{pages}}) {
+ $list.=$page." ";
+ }
+ $list.="<br>\n";
+ $list.="changed ".$change->{when}." by ".
+ htmllink("index", $change->{user}).
+ ": <i>".$change->{message}."</i>\n";
+ $list.="</li>\n";
+ }
+ $list.="</ul>\n";
+
+ print $q->header,
+ $q->start_html("RecentChanges"),
+ $q->h1("<a href=\"$url\">$wikiname</a>/ RecentChanges"),
+ $list,
+ $q->end_form,
+ $q->end_html;
+ return;
+ }
+
+ my ($page)=$q->param('page')=~/$wiki_file_regexp/;
+ if (! defined $page || ! length $page || $page ne $q->param('page') ||
+ $page=~/$wiki_file_prune_regexp/ || $page=~/^\//) {
+ error("bad page name");
+ }
+ $page=lc($page);
+
+ my $action=$q->request_uri;
+ $action=~s/\?.*//;
+
+ if ($do eq 'create') {
+ if (exists $pagesources{lc($page)}) {
+ # hmm, someone else made the page in the meantime?
+ print $q->redirect("$url/".htmlpage($page));
+ }
+
+ my @page_locs;
+ my ($from)=$q->param('from')=~/$wiki_file_regexp/;
+ if (! defined $from || ! length $from ||
+ $from ne $q->param('from') ||
+ $from=~/$wiki_file_prune_regexp/ || $from=~/^\//) {
+ @page_locs=$page;
+ }
+ else {
+ my $dir=$from."/";
+ $dir=~s![^/]+/$!!;
+ push @page_locs, $dir.$page;
+ push @page_locs, "$from/$page";
+ while (length $dir) {
+ $dir=~s![^/]+/$!!;
+ push @page_locs, $dir.$page;
+ }
+ }
+
+ $q->param("do", "save");
+ print $q->header,
+ $q->start_html("Creating $page"),
+ $q->start_h1("<a href=\"$url\">$wikiname</a>/ Creating $page"),
+ $q->start_form(-action => $action),
+ $q->hidden('do'),
+ "Select page location:",
+ $q->popup_menu('page', \@page_locs),
+ $q->textarea(-name => 'content',
+ -default => "",
+ -rows => 20,
+ -columns => 80),
+ $q->br,
+ "Optional comment about this change:",
+ $q->br,
+ $q->textfield(-name => "comments", -size => 80),
+ $q->br,
+ $q->submit("Save Page"),
+ $q->end_form,
+ $q->end_html;
+ }
+ elsif ($do eq 'edit') {
+ my $content="";
+ if (exists $pagesources{lc($page)}) {
+ $content=readfile("$srcdir/$pagesources{lc($page)}");
+ $content=~s/\n/\r\n/g;
+ }
+ $q->param("do", "save");
+ print $q->header,
+ $q->start_html("Editing $page"),
+ $q->h1("<a href=\"$url\">$wikiname</a>/ Editing $page"),
+ $q->start_form(-action => $action),
+ $q->hidden('do'),
+ $q->hidden('page'),
+ $q->textarea(-name => 'content',
+ -default => $content,
+ -rows => 20,
+ -columns => 80),
+ $q->br,
+ "Optional comment about this change:",
+ $q->br,
+ $q->textfield(-name => "comments", -size => 80),
+ $q->br,
+ $q->submit("Save Page"),
+ $q->end_form,
+ $q->end_html;
+ }
+ elsif ($do eq 'save') {
+ my $file=$page.$default_pagetype;
+ my $newfile=1;
+ if (exists $pagesources{lc($page)}) {
+ $file=$pagesources{lc($page)};
+ $newfile=0;
+ }
+
+ my $content=$q->param('content');
+ $content=~s/\r\n/\n/g;
+ $content=~s/\r/\n/g;
+ writefile("$srcdir/$file", $content);
+
+ my $message="web commit from $ENV{REMOTE_ADDR}";
+ if (defined $q->param('comments')) {
+ $message.=": ".$q->param('comments');
+ }
+
+ if ($svn) {
+ if ($newfile) {
+ rcs_add($file);
+ }
+ # presumably the commit will trigger an update
+ # of the wiki
+ rcs_commit($message);
+ }
+ else {
+ refresh();
+ }
+
+ print $q->redirect("$url/".htmlpage($page));
+ }
+ else {
+ error("unknown do parameter");
+ }