Re: Write a file if grep finds a pattern?

Can't resist giving a shell solution, as it's shorter than the Perl solutions offered so far:

if grep -l error /temp/logbook.log > /dev/null
then echo 'ok!' > /temp/ok.txt
fi
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Comment on Re: Write a file if grep finds a pattern? Download Code

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Re^2: Write a file if grep finds a pattern? by Anonymous Monk on Nov 19, 2010 at 11:41 UTC
? if( `grep -l error /temp/logbook.log > /dev/null`) `echo 'ok!' > /temp/ok.txt` } [download]	[reply] [d/l]
Re^3: Write a file if grep finds a pattern? by JavaFan (Canon) on Nov 19, 2010 at 13:29 UTC
Let's say, you're asking the shell to run grep and discard the output, then collect the output, and if you say anything, you ask the shell to put something in a file, all to show your "Perl" program is as long as a shell one? It doesn't even work this way. But if you want to golf (if you have 'ack', shave off one character): `grep error c:/temp/logbook.log&&echo 'ok!'>/temp/ok.txt` [download] Slapping backquotes on it to make it "Perl", still is two characters more.	[reply] [d/l]