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Full Discussion: Monitor log file
Top Forums Shell Programming and Scripting Monitor log file Post 302639933 by Chubler_XL on Sunday 13th of May 2012 07:39:09 PM
Old 05-13-2012
You could use awk to only look for new occurances of string within log:

(first line creates logfile if none exists - this simplifies rest of code as we can ignore file not existing case).

Code:
[ -f logfile ] || > logfile
LN=$(wc -l < logfile)
stop weblogin &
CHILD=$!
 
while [ -d /proc/$CHILD ] && awk "NR>$LN && /unable to stop weblogin/{exit 1}" logfile
do
   sleep 1
done
[ -d /proc/$CHILD ] && ! awk "NR>$LN && /unable to stop weblogin/{exit 1}" logfile && kill $CHILD


Last edited by Chubler_XL; 05-13-2012 at 08:50 PM..
This User Gave Thanks to Chubler_XL For This Post:
 

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LOG1P(3)								 1								  LOG1P(3)

log1p - Returns log(1 + number), computed in a way that is accurate even when the value of number is close to zero

SYNOPSIS
float log1p (float $number) DESCRIPTION
log1p(3) returns log(1 + $number) computed in a way that is accurate even when the value of $number is close to zero. log(3) might only return log(1) in this case due to lack of precision. PARAMETERS
o $number - The argument to process RETURN VALUES
log(1 + $number) CHANGELOG
+--------+--------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+--------------------------------------------------+ | 5.3.0 | | | | | | | This function is now available on all platforms | | | | +--------+--------------------------------------------------+ SEE ALSO
expm1(3), log(3), log10(3). PHP Documentation Group LOG1P(3)
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