defunct

来源： https://stackoverflow.com/questions/41961430/how-to-cleanly-kill-subprocesses-in-python

来源： https://stackoverflow.com/questions/41961430/how-to-cleanly-kill-subprocesses-in-python

来源： https://stackoverflow.com/questions/41961430/how-to-cleanly-kill-subprocesses-in-python

来源： https://stackoverflow.com/questions/1506902/why-do-processes-spawned-by-cron-end-up-defunct

问题 kill - does it kill the process right away? I found my answer and I set up a signal handler for SIGCHLD and introduced wait in that handler. That way, whenever parent process kill s a child process, this handler is called and it calls wait to reap the child. - motive is to clear process table entry. I am still seeing some child processes going for a few seconds even without its parent process dying. - how is this possible? I am seeing this via ps . Precisely ps -o user,pid,ppid,command -ax

问题 kill - does it kill the process right away? I found my answer and I set up a signal handler for SIGCHLD and introduced wait in that handler. That way, whenever parent process kill s a child process, this handler is called and it calls wait to reap the child. - motive is to clear process table entry. I am still seeing some child processes going for a few seconds even without its parent process dying. - how is this possible? I am seeing this via ps . Precisely ps -o user,pid,ppid,command -ax

问题 I'm looking for the cleanest way to have a language agnostic keybinding that will insert my initials + formatted timestamp e.g.: --<my initials> (28 Oct 2013 11:38:20 AM) into an Emacs buffer, so that I can initial my comments. I know I could create a function and create a keybinding to call it, but I feel like Emacs probably has a de facto way to do stuff like this, presumedly through the use of macros. 回答1: F3 (start recording macro) --AA C-u M-! date C-e (insert text, insert output from

问题 what does kill exactly do? I have a parent process which is creating 100 (as an example) child processes one after another. At the end of any child's job, I kill the child with kill(pid_of_child, SIGKILL) and I cannot see that in ps output. But if something goes wrong with the parent process and I exit from the parent process with exit(1) (at this point only 1 child is there - I can check tht in ps ), at that point I see a lot of <defunct> processes whose ppid is pid of parent process. How is

问题 what does kill exactly do? I have a parent process which is creating 100 (as an example) child processes one after another. At the end of any child's job, I kill the child with kill(pid_of_child, SIGKILL) and I cannot see that in ps output. But if something goes wrong with the parent process and I exit from the parent process with exit(1) (at this point only 1 child is there - I can check tht in ps ), at that point I see a lot of <defunct> processes whose ppid is pid of parent process. How is

问题 On my Fedora Core 9 webserver with kernel 2.6.18, init isn't reaping zombie processes. This would be bearable if it wasn't for the process table eventually reaching an upper limit where no new processes can be allocated. Sample output of ps -el | grep 'Z' : F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD 5 Z 0 2648 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 51 2656 1 0 75 0 - 0 exit ? 00:00:00 sendmail <defunct> 1 Z 0 2670 1 0 75 0 - 0 exit ? 00:00:02 crond <defunct> 4 Z 0 2874