X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/6c8cf5dd571662f981227489f7c4652a1a1f10cd..0dc8b912269e8df8422e5b6baab4871d1bb510c0:/IkiWiki/Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 8e513c1f6..a3ecccd5b 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -2,11 +2,13 @@
 
 use warnings;
 use strict;
+use Cwd q{abs_path};
+use Data::Dumper;
+use IkiWiki;
 
 package 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($0);
@@ -17,31 +19,16 @@ sub gen_wrapper () { #{{{
 	if ($config{setup}) {
 		error("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("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) {
 		$envsave.=<<"EOF"
@@ -49,12 +36,35 @@ sub gen_wrapper () { #{{{
 		asprintf(&newenviron[i++], "%s=%s", "$var", s);
 EOF
 	}
+	if ($config{rcs} eq "svn" && $config{notify}) {
+		# Support running directly as hooks/post-commit by passing
+		# $2 in REV in the environment.
+		$envsave.=<<"EOF"
+	if (argc == 3)
+		asprintf(&newenviron[i++], "REV=%s", argv[2]);
+	else if ((s=getenv("REV")))
+		asprintf(&newenviron[i++], "%s=%s", "REV", s);
+EOF
+	}
+	if ($config{rcs} eq "tla" && $config{notify}) {
+		$envsave.=<<"EOF"
+	if ((s=getenv("ARCH_VERSION")))
+		asprintf(&newenviron[i++], "%s=%s", "ARCH_VERSION", s);
+EOF
+	}
+	
+	$Data::Dumper::Indent=0; # no newlines
+	my $configstring=Data::Dumper->Dump([\%config], ['*config']);
+	$configstring=~s/\\/\\\\/g;
+	$configstring=~s/"/\\"/g;
+	$configstring=~s/\n/\\\n/g;
 	
-	open(OUT, ">ikiwiki-wrap.c") || error("failed to write ikiwiki-wrap.c: $!");;
+	open(OUT, ">$wrapper.c") || error("failed to write $wrapper.c: $!");;
 	print OUT <<"EOF";
 /* A wrapper for ikiwiki, can be safely made suid. */
 #define _GNU_SOURCE
 #include <stdio.h>
+#include <sys/types.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
@@ -64,33 +74,34 @@ extern char **environ;
 int main (int argc, char **argv) {
 	/* Sanitize environment. */
 	char *s;
-	char *newenviron[$#envsave+3];
+	char *newenviron[$#envsave+5];
 	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("$params\\n");
-		exit(0);
+	if (setregid(getegid(), -1) != 0 || setreuid(geteuid(), -1) != 0) {
+		perror("failed to drop real uid/gid");
+		exit(1);
 	}
-	
-	execl($call);
+
+	execl("$this", "$this", NULL);
 	perror("failed to run $this");
 	exit(1);
 }
 EOF
 	close OUT;
-	if (system("gcc", "ikiwiki-wrap.c", "-o", possibly_foolish_untaint($config{wrapper})) != 0) {
-		error("failed to compile ikiwiki-wrap.c");
+	if (system("gcc", "$wrapper.c", "-o", $wrapper) != 0) {
+		error("failed to compile $wrapper.c");
 	}
-	unlink("ikiwiki-wrap.c");
+	unlink("$wrapper.c");
 	if (defined $config{wrappermode} &&
-	    ! chmod(oct($config{wrappermode}), possibly_foolish_untaint($config{wrapper}))) {
-		error("chmod $config{wrapper}: $!");
+	    ! chmod(oct($config{wrappermode}), $wrapper)) {
+		error("chmod $wrapper: $!");
 	}
-	print "successfully generated $config{wrapper}\n";
+	print "successfully generated $wrapper\n";
 } #}}}
 
 1