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Shell Programming and Scripting

Extract character from string

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# 1  
Old 03-12-2009
Extract character from string
ps -eaf | grep “oracleTRLV (LOCAL=NO)” | while read ora_proc
do
echo $ora_proc
done

I would like to modify the above shell so that if character 13 and 14 equal "12" to do something.

Sorry I'm new to shellSmilie

# 2  
Old 03-12-2009
grep -v '^.\{11\}12'

Code:
ps -eaf | grep “oracleTRLV (LOCAL=NO)” |  grep -v '^.\{12\}12' | \
while read ora_proc 
do
echo $ora_proc
done

This skips over any output from ps the has a "12" starting at pos 13
# 3  
Old 03-12-2009
Shell programming in HP-Unix
I have to build the "12" dinamically (number of minutes) and to check if what's in the string at that position is greater then this ("12" in this case) number of minutes.
# 4  
Old 03-12-2009

Code:
ps -eaf |
 awk '/oracleTRLV (LOCAL=NO)/ && substr($0,13,2) >= 12 {
    print substr($0,13,2), $0}
' |
 while read num ora_proc
 do
     echo num=$num
     echo $ora_proc
 done

# 5  
Old 03-12-2009
Shell
Chris, I don't see in the script how do you build the number of minutes.

Let me explain what I want to do: I have an application that creates processes in HP-Unix that for some reason don't "die".
The result of:
ps -eaf|grep "oracleTRLV (LOCAL=NO)"

are rows like this:
oracle 1769 1 0 15:24:13 ? 0:00 oracleTRLV (LOCAL=NO)

I want to make a shell (I will run it every 15 minutes) that will take each row and "kill" all the processes that are older then 15 minutes.

By the way, I bought your book "Shell Scripting Recipes" but is way to advanced for me.

So, how do I start?
# 6  
Old 03-12-2009
If you're on Solaris, look into:
Code:
ps -e -o pid,etime,comm

'man ps' yields:
Code:
     etime In the POSIX locale, the elapsed time since  the  pro-
           cess was started, in the form:

           [[dd-]hh:]mm:ss

           where

     dd    is the number of days

     hh    is the number of hours

     mm     is the number of minutes

     ss    is the number of seconds

     The dd field will be a decimal integer. The hh,  mm  and  ss
     fields will be two-digit decimal integers padded on the left
     with zeros.

The it becomes a matter of simple parsing of the second field and converting it to seconds and comparing it against your crontab scheduling policy (15mins).
# 7  
Old 03-13-2009
Shell
I'm on HP-Unix 10 and the above doesn't work.

Stupid questions:
1) How do I assign a value to a variable in hp-unix?
2) How do I concatenate 2 variables in hp-unix?
3) How do I write an "if" statement in hp-unix?
4) How to I extract a piece of a string inside an "if" statement?
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