I am writing a part of a script that needs to grep for process ID's for a certain process, and then kill them if they are greater then 0. Here is what I have so far.
Code:
Process=$(ps -ef | grep Proc | grep -v Proc)
if [ "${Process}" -gt "0" ]
then
echo "Process Is not running"
else
kill -------------
fi
It works if I set it up and manually type in the process ID's, but me being a newb to this unix thing, I can't figure it out. Does anyone have any insight?
Thanks in advance!
Jeff
Last edited by Scott; 11-18-2010 at 05:05 PM..
Reason: Please use code tags
Pls just give me an example of output you have when typing this :
Code:
ps -ef | grep Proc | grep -v grep
indeed:
Code:
ps -ef | grep Proc | grep -v Proc
makes no sens : it means you retain only lines having "Proc" pattern in it, and then you filter out (-v option) all of those lines that have "Proc" pattern in it : you filter out just what you have filtered in : the result is you retain nothing : so $Process is just empty
First thing we see is the output has a number of fields (UID,PID,PPID, etc). Also note the grep process has picked it's self up "grep apache" contains agache too.
There are two common methods to avoid finding the grep command in your list
pipe the list to "grep -v grep" (everything not containing grep)
grep for [a]pache instead. Square brackets mean any single character from list, and in this case the list is a single "a". So again we are searching for apache but this time the grep command line dosn't contain apache.
Now you want the 2nd field from the listing (ie the PID) as you can see a variable number of spaces exists between UID and PID, this makes things hard for the cut command to fet the 2nd field and most use awk to do this job as it count multi spaces as 1 seperator.
The output will now be the PIDs or blank if none found. Use the -z option of test to check for blank strings. So putting it together to get a list of all command lines that contain your Proc you need:
Code:
Process=$(ps -ef | grep [P]roc | awk '{ print $2}')
if [ -z "$Process" ]
then
echo "Process Is not running"
else
kill $Process
fi
Last edited by Chubler_XL; 11-18-2010 at 05:34 PM..
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