suidback_server_groups.patch

--- mod_ruid2.c.orig	2011-02-24 23:25:28.000000000 +0900
+++ mod_ruid2.c	2011-10-21 16:06:53.000000000 +0900
@@ -78,10 +78,12 @@
 
 typedef struct
 {
+    int server_groups_size;
 	uid_t default_uid;
 	gid_t default_gid;
 	uid_t min_uid;
 	gid_t min_gid;
+    gid_t *server_groups;
 	int8_t stat_used;
 	const char *chroot_dir;
 	const char *document_root;
@@ -150,6 +152,8 @@
 	conf->stat_used=UNSET;
 	conf->chroot_dir=NULL;
 	conf->document_root=NULL;
+    conf->server_groups=NULL;
+    conf->server_groups_size=0;
 
 	return conf;
 }
@@ -397,7 +401,11 @@
 		}
 		cap_free(cap);
 
-		setgroups(0,NULL);
+        if (conf->server_groups_size == 0)
+            setgroups(0, NULL);
+        else
+            setgroups(conf->server_groups_size, conf->server_groups);
+
 		setgid(unixd_config.group_id);
 		setuid(unixd_config.user_id);
 	
@@ -541,6 +549,16 @@
 	cap_t cap;
 	cap_value_t capval[2];
 
+    int     gidsize;
+    gid_t   *grouplist;
+
+    gidsize = getgroups(0, NULL);
+    grouplist = apr_pcalloc(r->pool, gidsize * sizeof(gid_t));
+    getgroups(gidsize, grouplist);
+
+    conf->server_groups = grouplist;
+    conf->server_groups_size = gidsize;
+
 	if (dconf->ruid_mode==RUID_MODE_STAT) capval[ncap++] = CAP_DAC_READ_SEARCH;
 	if (chroot_root != UNSET) capval[ncap++] = CAP_SYS_CHROOT;
 	if (ncap) {