Shell Programming and Scripting

hi
i don't understand ay of the syntax , i can't see how you seperated the hour from the process (which apperance in the same line of the file )
can you please explain
my loop goes like this :
cat bbb | while read line
do
then what ???
done
note the file looks like this
0:11 15639
0:30 5555
thank you very much .

Set the internal field seperator to space, : or tab <tab> is used here to denote an actual tab character.

Ok, lets break down a line in your file

0:30 54545 According to what I set IFS to this has 3 fields, I have decided to call them a,b and pid { a=0, b=30, pid=54545 }
is the concatenation of $a and $b > 30 ? if so kill the process identified by pid

in this example

[[ 030 -gt 30 ]] && kill $pid

evaluates to false so the process does not get killed.

Take the input from the file bbb, this the same as your "cat bbb | while" except without the UUOC.

hi my unix o.s doen't know the IFS and the -gt command
so what i did is
cat bbb | while read line
do
bsd = echo $line | cut -c 1-4
bsd1= echo $line | cut -c 6-11
done
now i don't know how to ask about the bsd variable if it's greater then
30minutes and kill the process

The script given by reborg will run in ksh without any problems. But assuming that you have an old box and no ksh, you can use this:

Code:

#!/bin/sh
#set -x                 # unhash to debug

while read time procid; do
hrs=`echo $time|cut -d':' -f1`
min=`echo $time|cut -d':' -f2`
if [ "$min" -gt 30 ]; then
        kill $procid
fi
done< bbb                #bbb is the filename as per your question

This assumes that the 'hr:min' field will never have a number such as 1:20 which means that while 20 is less than the 30 min that you want, the process has been running for over an hour.

i did reborgs' sugesstion i wrote at the beggining of the script
#!/usr/bin/ksh
i'm running my script like this
sh cs-sonia (name of the script)
and it's writing to me
UX:sh (cs-sonia): ERROR: 001 21489: not found
for each process what seems to be the problem???
please help me
another question why is it kill $pid and not kill -9 $pid
thanks a lot

use ksh, not sh to run the script. You are overriding the #!/usr/bin/ksh by running the script as sh cs-sonia.

kill, not kill -9 to send SIGTERM, not SIGKILL to the proccess. SIGKILL does not allow the process to "clean up" as it exits.

hi reborg
thanks a lot reborg it's work
but i want to remark something
when i did just kill it did not kill the process just kill -9
i still don't get why did you think that just kill
second thing
i want that this script will run automatic every 30 minutes how can i do that i understand that the command is sleep
but i do'nt know how to write it
should i write it from the working directory where the script run ?
thanks for quick response