Should this work?

Post #14,674 by Meerkat 10/22/01 8:01:34 PM Reply	Should this work? tail -f somefile \| grep -i something \| cut -f 5 What I want is the 'edited highlights' of a process that writes lots of stuff to a log file. But it doesn't, if I use -f. If I tail the file normally then it'll do as it's told, but with -f it just sits there and never finds 'something' even if 'something' has been written to 'somefile'. Is this a standard Unix behaviour, or is it perhaps Tru64 specific? (I don't have any other Unices at my disposal right now to do a comparison, but if I remember I'll give it a whirl on OS X tonight.) Cheers, John. On and on and on and on, and on and on and on goes John.
Post #14,709 by static 10/22/01 11:06:43 PM Reply	Strange. It works right under Linux. Maybe you need to see if tail and/or grep and/or cut have unbuffered modes. Wade. "All around me are nothing but fakes Come with me on the biggest fake of all!"
Post #14,720 by Meerkat 10/23/01 12:13:29 AM Reply	Now there's a term I often apply to Tru64 :) The man pages mention nothing of the sort. Think I'll do some more investigation on what is (mercifully) a slightly slow afternoon. On and on and on and on, and on and on and on goes John.
Post #14,722 by Meerkat 10/23/01 12:57:37 AM 10/23/01 8:21:09 PM Reply	Yup, it's because of buffering. [link\|http://groups.google.com/groups?q=%22tail+-f%22++tru64+pipe&hl=en&rnum=1&selm=fa.s72g4ov.19lubof%40ifi.uio.no\|This article (care of Google Groups) explains it.] Anyway, once I pumped enough pretend data in my somefile, it eventually spewed out a bunch of output. Which is exactly not how I wanted to do it. Oh well, I didn't really need this to work anyway. Tru64 is not my friend. (Edit: made the URL a proper link) On and on and on and on, and on and on and on goes John. Edited by Meerkat Oct. 23, 2001, 08:21:09 PM EDT Expand All History
Post #14,808 by drewk 10/23/01 3:23:37 PM Reply	Could you make that a real link? It's forcing right scroll. We have to fight the terrorists as if there were no rules and preserve our open society as if there were no terrorists. -- [link\|http://www.nytimes.com/2001/04/05/opinion/BIO-FRIEDMAN.html\|Thomas Friedman]
Post #14,827 by boxley 10/23/01 6:09:23 PM Reply	tail -f somefile \| sleep 5 \| grep -i something \| cut -f 5 might work or tail -f somefile \| xargs grep -i something \| cut -f 5 thanx, bill who is 2 lazy to try it over here tshirt front "born to die before I get old" thshirt back "fscked another one didnja?"

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