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long process listing with /usr/ucb/ps weird behaves

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# 1  
Old 06-07-2009
Java long process listing with /usr/ucb/ps weird behaves
hello

I am trying to run the following script to get the my-progam pid:

#!/bin/ksh
tt=`/usr/ucb/ps| grep -i $1| grep -v grep | awk '{print $2}'`
echo $tt

When I run the script I get the more PIDs

$./test.sh my-program
12033 15033 15034

Actually my-program's PID is 12033....I am not sure why I am I getting the other two PIDs. These other two PIDs change everytime I run the script.

But when I then the script without a command line argument, it gives me only one PID.

Can anyone help me out...as I need to use similar script to get the PID as a result to some program?
# 2  
Old 06-07-2009
Quote:
Originally Posted by sreeniatbp
hello

I am trying to run the following script to get the my-progam pid:

When you post code, please wrap it in [code] tags.
Quote:
Code:
#!/bin/ksh
tt=`/usr/ucb/ps| grep -i $1| grep -v grep | awk '{print $2}'`
echo $tt


Why not:

Code:
tt=$$

If you want the PID of the calling program, use $PPID.
Quote:
When I run the script I get the more PIDs

$./test.sh my-program
12033 15033 15034

Actually my-program's PID is 12033....I am not sure why I am I getting the other two PIDs. These other two PIDs change everytime I run the script.

Have you looked at the output of ps?
Quote:
But when I then the script without a command line argument, it gives me only one PID.

Can anyone help me out...as I need to use similar script to get the PID as a result to some program?
# 3  
Old 06-08-2009
[code]
#!/bin/ksh

for i in `/usr/ucb/ps -wwaux | grep $1 | grep -v grep |awk '{print $2}'`
do
echo $i
#kill -9 $i
done


When I run this I get two different PIDs, one for 116694 and 17002. this happens when i run the command as

$/usr/ucb/ps -wwwaux | grep myServices-Primary
tradmin 16694 0.0 1.4443536220216 ? S 12:41:05 2:18 /opt/barc/bin/engine --pid --run /opt/barc/domain/SOAMP_NTA_DEV//myServices-Primary/myServices-Primary.xyc --innerProcess

$./mytest myservice-primary

I couldnt still manage to still kill the process...as I only wnat to kill this process.
# 4  
Old 06-08-2009
Quote:
Originally Posted by sreeniatbp
Code:
#!/bin/ksh

for i in `/usr/ucb/ps -wwaux | grep $1 | grep -v grep |awk '{print $2}'`


Don't use for; pipe the output into a loop.

Why are you using -ww when all you want is the second field?

Can you choose the fields you want with your version of ps (-o option)?
Quote:
Code:
do
echo $i
#kill -9 $i
done


What output does this produce:

Code:
/usr/ucb/ps -aux | grep $1 | grep -v grep |
while read owner pid ppid
do
  printf "PID = %d\n" "$pid"
done

# 5  
Old 06-09-2009
There are two threads going for this topic:

https://www.unix.com/shell-programmin...l-process.html

The answer to the original question is that when you call the script with the parameter, the call to the script appears in the "ps" list complete with the parameter. You need to "grep -v" the script name from the "ps" list.

For cfajohnson, I believe that $1 is the text to be searched for in the "ps" display (not the process ID). I guess we need "/usr/ucb/ps -wwaux" to see enough of the original command line to find the string with "grep".
# 6  
Old 06-09-2009
Quote:
Originally Posted by methyl
There are two threads going for this topic:

https://www.unix.com/shell-programmin...l-process.html

The answer to the original question is that when you call the script with the parameter, the call to the script appears in the "ps" list complete with the parameter. You need to "grep -v" the script name from the "ps" list.

'grep -v grep' should have the same effect.
Quote:

For cfajohnson, I believe that $1 is the text to be searched for in the "ps" display (not the process ID). I guess we need "/usr/ucb/ps -wwaux" to see enough of the original command line to find the string with "grep".

All versions of ps that I've seen will always print the command with or without -ww (unless it's suppressed with the -o option).
# 7  
Old 06-10-2009
The shebang at the start of the script starts a new shell and the command line appears in memory.

Consider this example:

Code:
#!/bin/ksh
# myscript
PARAM="$1"
ps -ef|grep "${PARAM}"

./myscript myparameter
root 25874 25872  1 11:55:21 pts/ta    0:00 grep myparameter
root 25872 22814  2 11:55:21 pts/ta    0:00 /bin/ksh ./myscript myparameter

I've seen many unixes with "ps" supplied which does not display the full command line without additional parameters or invoking an alternative "ps".
e.g. HP-UX, old SCO and old SUNOS.
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