Hi, In Cygwin fork code the statement int res = setjmp (grouped.ch.jmp); if (res) res = fork_child (grouped.ch.parent, grouped.first_dll, grouped.load_dlls); else res = fork_parent (grouped.ch.parent, grouped.first_dll, grouped.load_dlls, esp, grouped.ch); avoids the fork being called repeatedly by the created process of parent. Can anyone tell me how this actually happens. Thanks in advance for your time and comments. Thanks Sudhakar -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/