hi, I am trying to do a ptrace on a thread. Ptrace returns successfully. However when I do a waitpid where pid I pass is the pid of the thread I wait returns immediately. When I use the same program on a unthreaded process it works fine. Can anybody help me with this? __________________________________________________ Do you Yahoo!? Yahoo! Mail Plus - Powerful. Affordable. Sign up now. http://mailplus.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/