Parent/Child Scripting logic Question


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Parent/Child Scripting logic Question
# 1  
Old 11-30-2005
Parent/Child Scripting logic Question

I have Parent script that will execute a child script. The child script will take about 2 hours to run and I wanted to somehow build a logic for parent.sh to wait and perform ps -ef|grep cp|grep -v on the child.sh cp process and loop and check return code of child.sh $? as well. Once they are both good 0 then move on..if not then loop and keep on checking the return code.
Can someone give me the logic of how that would work?

parent.sh
Code:
#execute child.sh
./child.sh
# write loop to check for return code of ps and child.sh. if 0 then move else else sleep anc check.


child.sh
Code:
#the child script is build dynamically
cp /u01/*.* /u00/

thanks alot
# 2  
Old 11-30-2005
Quote:
Originally Posted by jigarlakhani
I have Parent script that will execute a child script. The child script will take about 2 hours to run and I wanted to somehow build a logic for parent.sh to wait and perform ps -ef|grep cp|grep -v on the child.sh cp process and loop and check return code of child.sh $? as well. Once they are both good 0 then move on..if not then loop and keep on checking the return code.
Can someone give me the logic of how that would work?

parent.sh
Code:
#execute child.sh
./child.sh
# write loop to check for return code of ps and child.sh. if 0 then move else else sleep anc check.


child.sh
Code:
#the child script is build dynamically
cp /u01/*.* /u00/

thanks alot

will something like this work?

set -x
filecopyfinished=false
while false
do
ps -ef|grep cp|grep -v grep
if [ $? -eq 0 ];then
echo "copy is finished"
filecopyfinished==true
else
sleep 50
echo "copy is not finished"
filecopyfinished=false
fi
done
# 3  
Old 11-30-2005
I figured it out..
ksh>top&
Code:
#!/bin/ksh
#set -x
filecopyfinished=false
while true
do
export a=`ps -ef|grep top|grep -v grep|wc -l`
echo "there are currently $a processes running for the top command"
if [ $a -eq 0 ];then
        echo "copy is finished"
        filecopyfinished=true
        exit
else
        sleep 10
        echo "copy is not finished, waiting"
        filecopyfinished=false
fi
done

# 4  
Old 12-01-2005
Now that you have got a solution. Try this as well.

Use the kill -0 $PID feature.

Look at this post. That should help you out.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

parent and child directory

does anyone know how to check in an 'if' statement if a particular directory is a child directory of a particular directory? help ~ (2 Replies)
Discussion started by: ymc1g11
2 Replies

2. Shell Programming and Scripting

forking a child process and kill its parent to show that child process has init() as its parent

Hi everyone i am very new to linux , working on bash shell. I am trying to solve the given problem 1. Create a process and then create children using fork 2. Check the Status of the application for successful running. 3. Kill all the process(threads) except parent and first child... (2 Replies)
Discussion started by: vizz_k
2 Replies

3. Homework & Coursework Questions

Need help with deleting childīs parent and child subprocess

1. The problem statement, all variables and given/known data: I need to make an program that in a loop creates one parent and five children with fork(). The problem i'm trying to solve is how to delete the parent and child of the childīs process. 2. Relevant commands, code, scripts,... (0 Replies)
Discussion started by: WhiteFace
0 Replies

4. Programming

To share fd between parent and child

i used function fork(). so i made two process. parent process accepted socket fd and writing to shared memory. then now. how can child process share parent's socket fd? is this possible? Thanks in advance (1 Reply)
Discussion started by: andrew.paul
1 Replies

5. UNIX for Advanced & Expert Users

Child Killing Parent

Hi all, I am writing a script which calls other third party scripts that perform numerous actions. I have no control over these scripts. My problem is, one of these scripts seems to execute and do what it is meant to do, but my calling / parent script always exits at that point. I need to... (4 Replies)
Discussion started by: mark007
4 Replies

6. Shell Programming and Scripting

Parent/Child Processes

Hello. I have a global function name func1() that I am sourcing in from script A. I call the function from script B. Is there a way to find out which script called func1() dynamically so that the func1() can report it in the event there are errors? Thanks (2 Replies)
Discussion started by: yoi2hot4ya
2 Replies

7. Programming

parent and child process question?

Hi everybody, I'm trying to understand how a parent and child processes interact. This function( below) basically measures the fork time from the perspective of the parent only. what i would like to know is how to measure the time from the perspective of parent and child (ie: inserting... (0 Replies)
Discussion started by: tosa
0 Replies

8. UNIX for Dummies Questions & Answers

kill parent and child

Hello all, I have gone through the search and looked at posting about idle users and killing processes. Here is my question I would like to kill an idle user ( which I can do) but how can I asure that all of his process is also killed whit out tracing his inital start PID. I have tried this on a... (4 Replies)
Discussion started by: larry
4 Replies

9. Filesystems, Disks and Memory

How hard can it be? ps child/parent

:( Since I'm fairly new to the scene and don't have much experience in shell programming, I decided to check out the net for a useful script or two. What I'm looking for is a script that would let me enter a PID and then show the process tree associated with it. So it would display the (grand-)... (2 Replies)
Discussion started by: velde046
2 Replies

10. UNIX for Dummies Questions & Answers

what are parent and child processes all about?

I don't follow what these are... this is what my text says... "When a process is started, a duplicate of that process is created. This new process is called the child and the process that created it is called the parent. The child process then replaces the copy for the code the parent... (1 Reply)
Discussion started by: xyyz
1 Replies
Login or Register to Ask a Question