X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/af9566ff1ae55d273ff96c7ca39e34265623a55d..f7f3b0bb7d91c74f67023e970cee71ad2ea260da:/IkiWiki/Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 52a7ca2c7..0f64a59f4 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -58,6 +58,7 @@ 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>
@@ -75,6 +76,11 @@ $envsave
 	newenviron[i]=NULL;
 	environ=newenviron;
 
+	if (setregid(getegid(), -1) != 0 || setreuid(geteuid(), -1) != 0) {
+		perror("failed to drop real uid/gid");
+		exit(1);
+	}
+
 	execl("$this", "$this", NULL);
 	perror("failed to run $this");
 	exit(1);