extracting line by line from a file

sanjith11 · 07-02-2004, 06:15 AM

hello

i have a file containing a set of PID's line by line. how can i extract each PID and check the status of the PID in a script.

reg
SAN

linuxxed · 07-02-2004, 06:30 AM

Quote:

Originally posted by sanjith11
hello

i have a file containing a set of PID's line by line. how can i extract each PID and check the status of the PID in a script.

reg
SAN

cat filename | while read PID
do
# check each pid's status by sending a signull
kill -0 $PID
if [ $? -ne 0 ]; then
echo "$PID is down"
else
echo "$PID is up"
fi
done

rshinoy · 07-02-2004, 06:34 AM

You can do it using a shell script like this
Code is :
-----------------------------
for ProcId in `cat $procFile`
do
< do the stuff to check the status of PID here >
done
----------------------------
I hope it is what you needed ?

jschiwal · 07-02-2004, 07:38 PM

This one-liner will give you a table with header. You can change what you want displayed by changing the -o output format fields, or do without a header with the --noheader option.

ps -o pid,stat --pid `cat pidlist`