X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/6c8cf5dd571662f981227489f7c4652a1a1f10cd..f517121d644d8822df93cf6b3c39154486dba30f:/IkiWiki/Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 8e513c1f6..79b9eb3e3 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -1,96 +1,123 @@
 #!/usr/bin/perl
 
+package IkiWiki;
+
 use warnings;
 use strict;
-
-package IkiWiki;
+use Cwd q{abs_path};
+use Data::Dumper;
+use IkiWiki;
 
 sub gen_wrapper () { #{{{
-	eval q{use Cwd 'abs_path'};
 	$config{srcdir}=abs_path($config{srcdir});
 	$config{destdir}=abs_path($config{destdir});
 	my $this=abs_path($0);
 	if (! -x $this) {
-		error("$this doesn't seem to be executable");
+		error(sprintf(gettext("%s doesn't seem to be executable"), $this));
 	}
 
 	if ($config{setup}) {
-		error("cannot create a wrapper that uses a setup file");
+		error(gettext("cannot create a wrapper that uses a setup file"));
 	}
-	
-	my @params=($config{srcdir}, $config{destdir},
-		"--wikiname=$config{wikiname}",
-		"--templatedir=$config{templatedir}");
-	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 $config{historyurl};
-	push @params, "--diffurl=$config{diffurl}" if length $config{diffurl};
-	push @params, "--anonok" if $config{anonok};
-	push @params, "--adminuser=$_" foreach @{$config{adminuser}};
-	my $params=join(" ", @params);
-	my $call='';
-	foreach my $p ($this, $this, @params) {
-		$call.=qq{"$p", };
+	my $wrapper=possibly_foolish_untaint($config{wrapper});
+	if (! defined $wrapper || ! length $wrapper) {
+		error(gettext("wrapper filename not specified"));
 	}
-	$call.="NULL";
+	delete $config{wrapper};
 	
 	my @envsave;
 	push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 	               CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
-		       HTTP_COOKIE} if $config{cgi};
+		       HTTP_COOKIE REMOTE_USER} if $config{cgi};
 	my $envsave="";
 	foreach my $var (@envsave) {
 		$envsave.=<<"EOF"
 	if ((s=getenv("$var")))
-		asprintf(&newenviron[i++], "%s=%s", "$var", s);
+		addenv("$var", s);
 EOF
 	}
 	
-	open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
+	$Data::Dumper::Indent=0; # no newlines
+	my $configstring=Data::Dumper->Dump([\%config], ['*config']);
+	$configstring=~s/\\/\\\\/g;
+	$configstring=~s/"/\\"/g;
+	$configstring=~s/\n/\\n/g;
+	
+	#translators: The first parameter is a filename, and the second is
+	#translators: a (probably not translated) error message.
+	open(OUT, ">$wrapper.c") || error(sprintf(gettext("failed to write %s: %s"), "$wrapper.c", $!));;
 	print OUT <<"EOF";
 /* A wrapper for ikiwiki, can be safely made suid. */
-#define _GNU_SOURCE
 #include <stdio.h>
+#include <sys/types.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
 
 extern char **environ;
+char *newenviron[$#envsave+5];
+int i=0;
+
+addenv(char *var, char *val) {
+	char *s=malloc(strlen(var)+1+strlen(val)+1);
+	if (!s)
+		perror("malloc");
+	sprintf(s, "%s=%s", var, val);
+	newenviron[i++]=s;
+}
 
 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++]="WRAPPED_OPTIONS=$configstring";
 	newenviron[i]=NULL;
 	environ=newenviron;
 
-	if (argc == 2 && strcmp(argv[1], "--params") == 0) {
-		printf("$params\\n");
-		exit(0);
+	if (setregid(getegid(), -1) != 0 &&
+	    setregid(getegid(), -1) != 0) {
+		perror("failed to drop real gid");
+		exit(1);
 	}
-	
-	execl($call);
-	perror("failed to run $this");
+	if (setreuid(geteuid(), -1) != 0 &&
+	    setreuid(geteuid(), -1) != 0) {
+		perror("failed to drop real uid");
+		exit(1);
+	}
+
+	execl("$this", "$this", NULL);
+	perror("exec $this");
 	exit(1);
 }
 EOF
 	close OUT;
-	if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
-		error("failed to compile ikiwiki-wrap.c");
+
+	my $cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc';
+	if (system($cc, "$wrapper.c", "-o", "$wrapper.new") != 0) {
+		#translators: The parameter is a C filename.
+		error(sprintf(gettext("failed to compile %s"), "$wrapper.c"));
+	}
+	unlink("$wrapper.c");
+	if (defined $config{wrappergroup}) {
+		my $gid=(getgrnam($config{wrappergroup}))[2];
+		if (! defined $gid) {
+			error(sprintf("bad wrappergroup"));
+		}
+		if (! chown(-1, $gid, "$wrapper.new")) {
+			error("chown $wrapper.new: $!");
+		}
 	}
-	unlink("ikiwiki-wrap.c");
 	if (defined $config{wrappermode} &&
-	    ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
-		error("chmod $config{wrapper}: $!");
+	    ! chmod(oct($config{wrappermode}), "$wrapper.new")) {
+		error("chmod $wrapper.new: $!");
+	}
+	if (! rename("$wrapper.new", $wrapper)) {
+		error("rename $wrapper.new $wrapper: $!");
 	}
-	print "successfully generated $config{wrapper}\n";
+	#translators: The parameter is a filename.
+	printf(gettext("successfully generated %s"), $wrapper);
+	print "\n";
 } #}}}
 
 1