Douglas A. Tutty wrote: > On Mon, Jun 22, 2009 at 08:17:44PM -0400, Kamaraju S Kusumanchi wrote: > >> Currently I have a shell script that works as below. >> 1) launch proga, progb in the background using nohup. >> 2) Ask proga, progb to write a file when they finish. >> 3) Every five minutes check if these files are present. If they are >> present, launch progc. >> >> This gets me going for now. But it looks terribly inefficient. I would >> appreciate if someone can provide a better solution. > > While you may think its terribly inefficient, it isn't really. A fancy > "wait" function is just polling anyway, you're just making it overt. > You also have the ability to have proga and progb only touch the file if > they complete successfully. If you merely wait until their ps > disappears, you don't know if they crashed or properly completed. > > Doug.
Good point. I'll have to think about corner cases like these furthermore. The scenario you portray does sometimes occur. The suggestions I got in this thread are very helpful. Thanks guys. raju -- Kamaraju S Kusumanchi http://malayamaarutham.blogspot.com/ -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
