diff -urNp openpts-0.2.6-patched/src/ptsc.c openpts-0.2.6-current/src/ptsc.c
--- openpts-0.2.6-patched/src/ptsc.c	2012-08-21 15:57:07.733841433 -0400
+++ openpts-0.2.6-current/src/ptsc.c	2012-08-21 16:13:26.479732504 -0400
@@ -457,7 +457,10 @@ void ptsc_lock(void) {
             exit(1);
         }
         oldgrp = getegid();
-        setegid(grp.gr_gid);
+        if(setegid(grp.gr_gid) != 0){
+		LOG(LOG_ERR, "setegid fail");
+		exit(1);
+	}
     }
 
     oldmask = umask(0);
@@ -467,7 +470,10 @@ void ptsc_lock(void) {
     }
     if (grpent) {
         chmod(LOCK_DIR, 02775);
-        setegid(oldgrp);
+	if(setegid(oldgrp) != 0){
+		LOG(LOG_ERR, "setegid fail");
+		exit(1);
+        }
     }
     fd = open(LOCK_FILE, O_RDWR | O_CREAT | O_TRUNC, 0660);
     if (fd < 0) {