Hi! If a child is created by calling clone() with flags=0, it can successfully be waitpid()'ed either by specifying its pid as returned by clone() or by pid=-1. But if clone() is called with flags=(CLONE_THREAD | CLONE_SIGHAND | CLONE_VM), waitpid() fails with ECHILD, no matter if it's called with or without __WALL or __WCLONE flags, and even no matter if SIGCHLD is OR'ed explicitly with clone()'s flags. I've tried that on kernels 2.6.12 and 2.6.17, corresponding glibc's were with LinuxThreads and NPTL. Is it possible to wait for a child from the same thread group (i.e. having the same PID and different TID)? Thanks. -- Sergey -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
