On Wed, Feb 18, 2004 at 05:00:08PM -0500, Cris Sinnott wrote: > Package:glibc > Version:2.3.2-90 > > Waitpid fails with errno 10 when called from a thread other than the one > that started the process being waited on. This happens regardless of whether > the threads were created with pthread_create() or clone() (see sample code). > > The man pages installed on my system (see uname -a below), indicate that > libpthread/glibc support this behavior. From the LINUX NOTES section of the > man page for waitpid(2): > > ... since Linux 2.4 a thread can, and by default will, wait on children of > other threads in the same thread group... > > my system > >uname -a > Linux amd64 2.4.21-193-smp #1 SMP Thu Jan 22 16:52:24 UTC 2004 x86_64 x86_64 > x86_64 GNU/Linux
You have misinterpreted the man page. In fact, LinuxThreads threads are not all in the same "thread group". This will work using NPTL and a 2.6 kernel, but not otherwise. -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer
