97 lines
2.5 KiB
Perl
97 lines
2.5 KiB
Perl
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#!/usr/bin/perl
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use warnings;
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use strict;
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package IkiWiki;
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sub gen_wrapper () { #{{{
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eval q{use Cwd 'abs_path'};
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$config{srcdir}=abs_path($config{srcdir});
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$config{destdir}=abs_path($config{destdir});
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my $this=abs_path($0);
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if (! -x $this) {
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error("$this doesn't seem to be executable");
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}
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if ($config{setup}) {
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error("cannot create a wrapper that uses a setup file");
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}
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my @params=($config{srcdir}, $config{destdir},
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"--wikiname=$config{wikiname}",
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"--templatedir=$config{templatedir}");
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push @params, "--verbose" if $config{verbose};
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push @params, "--rebuild" if $config{rebuild};
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push @params, "--nosvn" if !$config{svn};
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push @params, "--cgi" if $config{cgi};
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push @params, "--url=$config{url}" if length $config{url};
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push @params, "--cgiurl=$config{cgiurl}" if length $config{cgiurl};
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push @params, "--historyurl=$config{historyurl}" if length $config{historyurl};
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push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
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push @params, "--anonok" if $config{anonok};
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push @params, "--adminuser=$_" foreach @{$config{adminuser}};
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my $params=join(" ", @params);
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my $call='';
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foreach my $p ($this, $this, @params) {
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$call.=qq{"$p", };
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}
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$call.="NULL";
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my @envsave;
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push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
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CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
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HTTP_COOKIE} if $config{cgi};
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my $envsave="";
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foreach my $var (@envsave) {
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$envsave.=<<"EOF"
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if ((s=getenv("$var")))
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asprintf(&newenviron[i++], "%s=%s", "$var", s);
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EOF
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}
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open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
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print OUT <<"EOF";
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/* A wrapper for ikiwiki, can be safely made suid. */
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#define _GNU_SOURCE
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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extern char **environ;
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int main (int argc, char **argv) {
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/* Sanitize environment. */
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char *s;
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char *newenviron[$#envsave+3];
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int i=0;
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$envsave
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newenviron[i++]="HOME=$ENV{HOME}";
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newenviron[i]=NULL;
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environ=newenviron;
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if (argc == 2 && strcmp(argv[1], "--params") == 0) {
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printf("$params\\n");
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exit(0);
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}
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execl($call);
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perror("failed to run $this");
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exit(1);
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}
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EOF
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close OUT;
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if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
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error("failed to compile ikiwiki-wrap.c");
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}
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unlink("ikiwiki-wrap.c");
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if (defined $config{wrappermode} &&
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! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
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error("chmod $config{wrapper}: $!");
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}
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print "successfully generated $config{wrapper}\n";
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} #}}}
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1
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