Sponsored Content
Top Forums Shell Programming and Scripting background processing in BASH Post 302311033 by wpeckham on Monday 27th of April 2009 05:10:25 PM
Old 04-27-2009
Other ways

This is bash we are talking about, there are ALWAYS other ways!

One might be to write a pipe for each child process, let the child feed its pipe, and let the parent read them. This is WAY overkill for your example, and there are opportunities for failure, but I have used it successfully. Google for examples.

You might consider defining the child processes as functions instead of scripts, then you do not have the extra I/O.
 

10 More Discussions You Might Find Interesting

1. Solaris

Best practice to run bash script in background

nohup /bin/bassh $HOME/scripts/test.sh > $HOME/log/test.log 2>&1 & nohup $HOME/scripts/test.sh > $HOME/log/test.log 2>&1 & Which is the good practice to run a script in background of above two ? does the first one will have any overhead on the system ? our system is SunOS 5.10... (2 Replies)
Discussion started by: mmasals
2 Replies

2. Linux

background processing in BASH

I have script 3 scripts 1 parent 2 children child1 child2 In the code below the 2 child processes fire almost Instantaneously in the background, Is that possible to know the status of pass/fail of each process "as it happens" ? In the present scenario although Child2... (5 Replies)
Discussion started by: jville
5 Replies

3. Shell Programming and Scripting

bash tee and background threads

Running centos 2.6, I have a bash script in which I'd like to run a number of background threads in parallel, tee'ing the results of the entire script to one file, while tee'ing the result of each background thread to another. Here's what I'm doing, where the number of csv files control the... (1 Reply)
Discussion started by: heatlamp
1 Replies

4. Programming

Unix Shell background processing

So I made my own unix shell, but i want to make a background process when using the & appended to the end, so far most of the commands seem to work (except cd, but thats another story) right now here is what I have got. Im thinking maybe I shouldn't be using switch and maybe switch it to... (27 Replies)
Discussion started by: Mercfh
27 Replies

5. Shell Programming and Scripting

Background tasks in a loop (bash)

I am trying to use a loop to start tasks 0-3, running 0,1,2 in the background with &. FOLDSET=( 0 1 2 3 ) for FOLDSET in ${FOLDSET} do if ; then BACKGRD="&" else BACKGRD="" fi # start task $FOLDSET task1 -nogui -ni -p $PROJ \ epochs=$EPOS ... (3 Replies)
Discussion started by: LMHmedchem
3 Replies

6. Shell Programming and Scripting

BASH - Handling background processes - distributed processing

NOTE: I am using BASH and Solaris 10 for this. Currently in the process of building a script that has a main "watcher" daemon that reads a configuration file and starts background processes based on it's global configuration. It is basically an infinite loop of configuration reading. Some of the... (4 Replies)
Discussion started by: dcarrion87
4 Replies

7. Shell Programming and Scripting

Suppress a background message in Bash

I'm having trouble with part of this bash script in Linux where I respawn a new instance of script and kill the old one to prevent forking (Yes, I know 'exec' will not fork but this needs to be interactive) When the old instance is kill it pops up "Terminated!" in the middle of the new instance... (7 Replies)
Discussion started by: Azrael
7 Replies

8. Shell Programming and Scripting

Parallel processing in bash?

Hi Say I am interested in processing a big data set over shell, and each process individually takes a long time, but many such processes can be pipe-lined, is there a way to do this automatically or efficiently in shell? For example consider pinging a list addresses upto 5 times each. Of... (5 Replies)
Discussion started by: jamie_123
5 Replies

9. Shell Programming and Scripting

Plink (processing multiple commands) using Bash

I'm completely brand new to bash scripting (migrating from Windows batch file scripting). I'm currently trying to write a bash script that will automatically reset "error-disabled" Cisco switch ports. Please forgive the very crude and inefficient script I have so far (shown below). It is... (10 Replies)
Discussion started by: MKANET
10 Replies

10. Shell Programming and Scripting

[Help] Bash script that runs in the background and checks for mails...

Hello! I have got a homework. The bash script runs in the background and checks the user's mailbox and when the user gets a new mail a popup window appears with some text and information about the sender (from who and when).I have no idea how to start, any help would be appreciated! Thank you:) (1 Reply)
Discussion started by: capo2ndfret
1 Replies
create child(1m)														  create child(1m)

NAME
create child - Creates a child pointer at the master replica of the parent directory SYNOPSIS
cdscp create child child-name clearinghouse clearinghouse-name ARGUMENTS
The full name of the child pointer. The full name of a clearinghouse that contains a replica of the child directory. DESCRIPTION
The create child command creates a child pointer at the master replica of the parent directory. When CDS looks up a name in the namespace, it uses child pointers to locate directory replicas. Use the set cdscp preferred clearinghouse command before issuing this command to ensure that the request is directed to the master replica. Privilege Required You must have insert permission to the parent directory. NOTES
Use the create child command only to re-create a child pointer that is accidentally deleted. This command is designed only for trou- bleshooting. This command will fail if the associated directory does not exist. If the associated directory exists, this command will return success- fully. This command is replaced at Revision 1.1 by the dcecp command and may not be provided in future releases of DCE. EXAMPLE
The following command creates the child pointer in the parent directory /.:/subsys. It uses the replica located at the /.:/subsys/NY_CH clearinghouse to fill in its replica set. cdscp> create child /.:/subsys clearinghouse /.:/subsys/NY_CH RELATED INFORMATION
Commands: delete child(1m), list child(1m), show child(1m) create child(1m)
All times are GMT -4. The time now is 04:41 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy