85 lines
2.0 KiB
Perl
85 lines
2.0 KiB
Perl
#!/usr/bin/perl
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use warnings;
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use strict;
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use Cwd q{abs_path};
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use Data::Dumper;
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package IkiWiki;
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sub gen_wrapper () { #{{{
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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 $wrapper=possibly_foolish_untaint($config{wrapper});
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if (! defined $wrapper || ! length $wrapper) {
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error("wrapper filename not specified");
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}
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delete $config{wrapper};
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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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push @envsave, qw{REV} if $config{svn};
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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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$Data::Dumper::Indent=0; # no newlines
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my $configstring=Data::Dumper->Dump([\%config], ['*config']);
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$configstring=~s/\\/\\\\/g;
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$configstring=~s/"/\\"/g;
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open(OUT, ">$wrapper.c") || error("failed to write $wrapper.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+4];
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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++]="WRAPPED_OPTIONS=$configstring";
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newenviron[i]=NULL;
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environ=newenviron;
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execl("$this", "$this", NULL);
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perror("failed to run $this");
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exit(1);
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}
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EOF
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close OUT;
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if (system("gcc", "$wrapper.c", "-o", $wrapper) != 0) {
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error("failed to compile $wrapper.c");
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}
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unlink("$wrapper.c");
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if (defined $config{wrappermode} &&
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! chmod(oct($config{wrappermode}), $wrapper)) {
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error("chmod $wrapper: $!");
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}
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print "successfully generated $wrapper\n";
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} #}}}
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1
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