Question about awk


 
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# 8  
Old 11-25-2016
Quote:
Originally Posted by Corona688
It really would.



I've seen the output you want, but not the input. So I will take a wild uninformed guess at what you actually want and hope that ps -aef looks the same on my system as yours:
would it be ok if I message you with my code?

[EDIT]: It appears that the problem was putting a # before the array name: ${#arrayOfChildren[0]}
removing that solved the problem. Still using
Code:
 ps -aef | awk -v PARENT="10820" '$3 == PARENT { print $2 }'

produces 3 PIDs where only 2 are the children.

[EDIT] the 3rd one is the script process I am running. How can I exclude it using your code?

Last edited by backslashV; 11-25-2016 at 04:32 PM..
# 9  
Old 11-25-2016
You should post to the forums and obscure anything you don't want seen.

I'm guessing this means my code didn't work?
# 10  
Old 11-25-2016
Quote:
Originally Posted by Corona688
You should post to the forums and obscure anything you don't want seen.

I'm guessing this means my code didn't work?
Please see my edit above.
# 11  
Old 11-25-2016
If it didn't have a parent PID of 12345, it wouldn't be extracted, I'm not convinced this is actually wrong.

If the process you're running happens to be a child of the process in question, it will appear as a side-effect of course. If all you want is your own children, you could just do ps -ef without the a, no?
# 12  
Old 11-25-2016
Quote:
Originally Posted by Corona688
If it didn't have a parent PID of 12345, it wouldn't be extracted, I'm not convinced this is actually wrong.

If the process you're running happens to be a child of the process in question, it will appear as a side-effect of course. If all you want is your own children, you could just do ps -ef without the a, no?
Ok so the processes are as follows:

Code:
csuser1  13324 13306 -bash
csuser1  13783 13324  \_ bash
csuser1  13971 13783      \_ vim ff
csuser1  14000 13783      \_ vim ss

I am running the script like this:
Code:
./myscript 13783

It is supposed to only show the two vim children processes.

right now, using your code, running the script and echoing the array contents shows:
Code:
PID TTY TIME CMD 13971 pts/0 00:00:00 vim
PID TTY TIME CMD 14000 pts/0 00:00:00 vim
PID TTY TIME CMD 22202 pts/0 00:00:00 myscript



Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!

Last edited by RudiC; 11-25-2016 at 06:31 PM.. Reason: Added CODE tags.
# 13  
Old 11-25-2016
Code:
ps -aef | awk -v SELF="$0" -v PARENT="10820" '($2 != SELF) && ($3 == PARENT) { print $2 }'

# 14  
Old 11-25-2016
Quote:
Originally Posted by Corona688
Code:
ps -aef | awk -v SELF="$0" -v PARENT="10820" '($2 != SELF) && ($3 == PARENT) { print $2 }'

still prints the process itself.
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