diff -b -p -u -r1.213 -r1.214
--- kppp/main.cpp	9 Sep 2002 17:58:39 -0000	1.213
+++ kppp/main.cpp	10 Dec 2002 17:45:20 -0000	1.214
@@ -328,7 +328,8 @@ pid_t execute_command (const QString & c
     signal(SIGCHLD, SIG_IGN);
 
     // close file descriptors
-    for (int fd = 3; fd < 20; fd++)
+    const int open_max = sysconf( _SC_OPEN_MAX );
+    for (int fd = 3; fd < open_max; ++fd)
       close(fd);
 
     // drop privileges if running setuid root