Bruno Tavares wrote: > Mick wrote: > >>>But how should Freevo be able to control a child of a child? >>> >>> > Freevo just has to worry on killing all the spwaned childs and it's > sub-childs. Since most of the helper processes do not notify anything > about spwaning sub-childs the only way i see to make this work is to > assign a process group to all your spawned helper-childs. > When you send a SIG_WHATEVER to the process group, all the processes > in that group(including (sub)+-childs) receive it. > It's full-proof and it eliminates unexpected behaviours from the helpers.
Now you got me. What are process groups? My knowledge says: when a child dies, the kernel sends SIGCHILD to the parent. The parent than should 'wait' for it to remove the zombie process. If a process dies, all children are now children of process 1 (init). So how can you get information when a child of your child dies? Only your child gets this. >>I wish I knew.. This could more easily be broken into how can any python >>know the pid of a child of a child. How can any process know of a child pid of a child (without searching the process structure in /proc)? >>I've been searching through python docs and mailing lists and I can't find a >>solution to this. Any ideas are welcome.. The fact is any child of a child >>which does not die when the child is sent SIGTERM is a badley progmramed >>child, and should be punished ;-).~ >> > No it's not :) There are plenty of justifiable reasons for this to > happen. And of course, this should not be punished, the child should > be spwaned having in mind that it MIGHT spwan a subchild. But if the child dies, the parent of the subchild is init. Since you don't know about the subchild, you don't get termination notification. Dischi -- As long as there are ill-defined goals, bizarre bugs, and unrealistic schedules, there will be Real Programmers willing to jump in and Solve The Problem, saving the documentation for later. ------------------------------------------------------- SF.Net email is sponsored by Shop4tech.com-Lowest price on Blank Media 100pk Sonic DVD-R 4x for only $29 -100pk Sonic DVD+R for only $33 Save 50% off Retail on Ink & Toner - Free Shipping and Free Gift. http://www.shop4tech.com/z/Inkjet_Cartridges/9_108_r285 _______________________________________________ Freevo-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/freevo-devel
