Processes that auto-background (daemonize, i.e. don't block) can't be debugged easily, and are IMHO kind of a bad idea. Usually such things have a -f (or some such) to tell them not to fork off a background identity. Just do that, and then watch it/respawn it normally?
If it has no way to easily wait() for it, then it's truly evil. You don't want to run such bad code anyway... -- Jim -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Rob Landley Sent: Wednesday, March 31, 2010 12:50 PM To: [email protected] Cc: [email protected] Subject: Re: run a process On Tuesday 30 March 2010 22:24:21 Murali K. Vemuri wrote: > unfortunately, my process does not block. So, I cannot use "watch" on > it. > is there any alternative applet to do this? > > Thanks & regards > Murali So you have a process that doesn't block, but is randomly dying. Huh. Ok, you can write a program that will do an inotify to monitor its /proc/$PID direectory and if that directory is deleted, respawn the process, find the PID of the new one, do an inotify monitor on _that_, and repeat. (Or you can just wimp out and do something like: while true done [ -z "$(pidof myprogname)" ] && myprogname sleep 60 done Really, if you can get your process to block life becomes much easier. You can always background a blocking process, but externally monitoring a non- blocking one is painful, you wind up busy-waiting or doing strange things with /proc and hoping the current kernel version supports it. Also, if the process you're monitoring is randomly dying, what makes you think the process doing the monitoring won't randomly die as well? Sounds like either your system's unstable or the process you're monitoring is buggy. Rob -- Latency is more important than throughput. It's that simple. - Linus Torvalds _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox _______________________________________________ busybox mailing list [email protected] http://lists.busybox.net/mailman/listinfo/busybox
