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Full Discussion: Conditional execution
Top Forums Shell Programming and Scripting Conditional execution Post 302853221 by edstevens on Friday 13th of September 2013 12:43:31 PM
Old 09-13-2013
Quote:
Originally Posted by Corona688
I'd use a variable for that. When you detect files, change the variable, and it'll stay changed.

find may be more efficient than ls | grep.

Code:
trap "rm -f /tmp/$$" EXIT
INTERVAL=300

while true
do
        find /mydir -uname root '!' -path 'lost+found' > /tmp/$$
        # If the file is not empty, set the interval to 10
        [ -s /tmp/$$ ] || INTERVAL=10
        cat /tmp/$$
        sleep $INTERVAL
done

Thanks. That was essentially what I needed. A little tweaking gave it the needed ability to switch back and forth ..

( for testing I shortened the intervals)

Code:
trap "rm -f /tmp/$$" EXIT
INTERVAL=10
while true
do
  find /home/oracle -user root '!' -path 'lost+found' > /tmp/$$
  # if the file is not empty, set the interval to 10
  if [ -s /tmp/$$ ]
  then
  INTERVAL=5
  else
  INTERVAL=10
  fi
  cat /tmp/$$
  ls -l /tmp/$$
  date
  echo Sleeping $INTERVAL
  sleep $INTERVAL
done

This User Gave Thanks to edstevens For This Post:
Corona688
 

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LEARN ABOUT DEBIAN

puzzle-diff

PUZZLE-DIFF(1)															    PUZZLE-DIFF(1)

NAME

       puzzle-diff - Compare pictures with libpuzzle

SYNOPSIS

       [-b <contrast barrier for cropping>] [-c] [-C <max cropping ratio>] [-e] [-E <similarity threshold>] [-h] [-H <max height>] [-l <lambdas>]
       [-n <noise cutoff>] [-p <p ratio>] [-t] [-W <max width>] <file 1> <file 2>

DESCRIPTION

       puzzle-diff compares two pictures and outputs the normalized distance.

       Try puzzle-diff -h for more info.

EXAMPLES

       Output distance between two images:

	 $ puzzle-diff pic-a-0.jpg pics-a-1.jpg
	 0.102286

       Compare two images, exit with 10 if they look the same, exit with 20 if they don't (may be useful for scripts):

	 $ puzzle-diff -e pic-a-0.jpg pics-a-1.jpg
	 $ echo $?
	 10

       Compute distance, without cropping and with computing the average intensity of the whole blocks:

	 $ puzzle-diff -p 1.0 -c pic-a-0.jpg pic-a-1.jpg
	 0.0523151

AUTHORS

       Frank DENIS libpuzzle at pureftpd dot org

SEE ALSO

       libpuzzle(3), puzzle_set(3)

								    2012-05-09							    PUZZLE-DIFF(1)
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