--- coreutils-5.93/src/su.c.setsid	2005-11-14 10:35:48.000000000 +0000
+++ coreutils-5.93/src/su.c	2005-11-14 10:53:03.000000000 +0000
@@ -497,6 +497,8 @@
   if (child == 0) {  /* child shell */
   change_identity (pw);
   pam_end(pamh, 0);
+  if (command)
+    setsid ();
 #endif
 
   if (simulate_login)
@@ -551,13 +553,27 @@
     sigemptyset(&action.sa_mask);
     action.sa_flags = 0;
     sigemptyset(&ourset);
-    if (sigaddset(&ourset, SIGTERM)
-        || sigaddset(&ourset, SIGALRM)
-        || sigaction(SIGTERM, &action, NULL)
-        || sigprocmask(SIG_UNBLOCK, &ourset, NULL)) {
+    if (command)
+      {
+	if (sigaddset(&ourset, SIGINT) || sigaddset(&ourset, SIGQUIT))
+	  {
+	    fprintf(stderr, "%s: signal masking malfunction\n", PROGRAM_NAME);
+	    caught = 1;
+	  }
+      }
+    if (!caught && (sigaddset(&ourset, SIGTERM)
+		    || sigaddset(&ourset, SIGALRM)
+		    || sigaction(SIGTERM, &action, NULL)
+		    || sigprocmask(SIG_UNBLOCK, &ourset, NULL))) {
       fprintf(stderr, "%s: signal masking malfunction\n", PROGRAM_NAME);
       caught = 1;
     }
+    if (!caught && command && (sigaction(SIGINT, &action, NULL)
+			       || sigaction(SIGQUIT, &action, NULL)))
+      {
+	fprintf(stderr, "%s: signal masking malfunction\n", PROGRAM_NAME);
+	caught = 1;
+      }
   }
   if (!caught) {
     do {