Index: config-scripts/cups-common.m4
===================================================================
--- config-scripts/cups-common.m4	(revision 9778)
+++ config-scripts/cups-common.m4	(working copy)
@@ -166,6 +166,9 @@
 dnl Check for geteuid function.
 AC_CHECK_FUNCS(geteuid)
 
+dnl Check for setpgid function.
+AC_CHECK_FUNCS(setpgid)
+
 dnl Check for vsyslog function.
 AC_CHECK_FUNCS(vsyslog)
 
Index: vcnet/config.h
===================================================================
--- vcnet/config.h	(revision 9778)
+++ vcnet/config.h	(working copy)
@@ -291,6 +291,13 @@
 
 
 /*
+ * Do we have the setpgid() function?
+ */
+
+/* #undef HAVE_SETPGID */
+
+
+/*
  * Do we have the vsyslog() function?
  */
 
Index: config.h.in
===================================================================
--- config.h.in	(revision 9778)
+++ config.h.in	(working copy)
@@ -232,6 +232,13 @@
 
 
 /*
+ * Do we have the setpgid() function?
+ */
+
+#undef HAVE_SETPGID
+
+
+/*
  * Do we have the vsyslog() function?
  */
 
Index: xcode/config.h
===================================================================
--- xcode/config.h	(revision 9778)
+++ xcode/config.h	(working copy)
@@ -230,6 +230,13 @@
 
 
 /*
+ * Do we have the setpgid() function?
+ */
+
+#define HAVE_SETPGID 1
+
+
+/*
  * Do we have the vsyslog() function?
  */
 
Index: scheduler/process.c
===================================================================
--- scheduler/process.c	(revision 9779)
+++ scheduler/process.c	(working copy)
@@ -246,9 +246,9 @@
   if (!pid)
     return (0);
   else if (force)
-    return (kill(pid, SIGKILL));
+    return (kill(-pid, SIGKILL));
   else
-    return (kill(pid, SIGTERM));
+    return (kill(-pid, SIGTERM));
 }
 
 
@@ -477,6 +477,19 @@
       nice(FilterNice);
 
    /*
+    * Put this process in its own process group so that we can kill any child
+    * processes it creates.
+    */
+
+#ifdef HAVE_SETPGID
+    if (setpgid(0, 0))
+      exit(errno);
+#else
+    if (setpgrp())
+      exit(errno);
+#endif /* HAVE_SETPGID */
+
+   /*
     * Change user to something "safe"...
     */