Fix link from meta plugin to tips/howto_stop_flooding_aggregators

[git.ikiwiki.info.git] / IkiWiki / Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index beabc56491b386940686997753ec8e8490063bac..79b9eb3e32499229aaa43f8884a776ae8471ccb4 100644 (file)
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -1,13 +1,13 @@
 #!/usr/bin/perl
 
+package IkiWiki;
+
 use warnings;
 use strict;
 use Cwd q{abs_path};
 use Data::Dumper;
 use IkiWiki;
 
-package IkiWiki;
-
 sub gen_wrapper () { #{{{
        $config{srcdir}=abs_path($config{srcdir});
        $config{destdir}=abs_path($config{destdir});
@@ -33,23 +33,7 @@ sub gen_wrapper () { #{{{
        foreach my $var (@envsave) {
                $envsave.=<<"EOF"
        if ((s=getenv("$var")))
-               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}) {
-               $envsave.=<<"EOF"
-       if ((s=getenv("ARCH_VERSION")))
-               asprintf(&newenviron[i++], "%s=%s", "ARCH_VERSION", s);
+               addenv("$var", s);
 EOF
        }
        
@@ -57,14 +41,13 @@ EOF
        my $configstring=Data::Dumper->Dump([\%config], ['*config']);
        $configstring=~s/\\/\\\\/g;
        $configstring=~s/"/\\"/g;
-       $configstring=~s/\n/\\\n/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>
@@ -72,40 +55,69 @@ EOF
 #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+5];
-       int i=0;
 $envsave
        newenviron[i++]="HOME=$ENV{HOME}";
        newenviron[i++]="WRAPPED_OPTIONS=$configstring";
        newenviron[i]=NULL;
        environ=newenviron;
 
-       if (setregid(getegid(), -1) != 0 || setreuid(geteuid(), -1) != 0) {
-               perror("failed to drop real uid/gid");
+       if (setregid(getegid(), -1) != 0 &&
+           setregid(getegid(), -1) != 0) {
+               perror("failed to drop real gid");
+               exit(1);
+       }
+       if (setreuid(geteuid(), -1) != 0 &&
+           setreuid(geteuid(), -1) != 0) {
+               perror("failed to drop real uid");
                exit(1);
        }
 
        execl("$this", "$this", NULL);
-       perror("failed to run $this");
+       perror("exec $this");
        exit(1);
 }
 EOF
        close OUT;
-       if (system("gcc", "$wrapper.c", "-o", $wrapper) != 0) {
+
+       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: $!");
+               }
+       }
        if (defined $config{wrappermode} &&
-           ! chmod(oct($config{wrappermode}), $wrapper)) {
-               error("chmod $wrapper: $!");
+           ! chmod(oct($config{wrappermode}), "$wrapper.new")) {
+               error("chmod $wrapper.new: $!");
+       }
+       if (! rename("$wrapper.new", $wrapper)) {
+               error("rename $wrapper.new $wrapper: $!");
        }
        #translators: The parameter is a filename.
-       printf(gettext("successfully generated %s\n"), $wrapper);
+       printf(gettext("successfully generated %s"), $wrapper);
+       print "\n";
 } #}}}
 
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