Sponsored Content
Top Forums Shell Programming and Scripting While loop - how to run processes one after another (2nd starts after first completes, and so on) Post 302771437 by DGPickett on Wednesday 20th of February 2013 03:42:06 PM
Old 02-20-2013
Well, strace does add overhead, so you might look at the strace to see what is exec'd that you could test ps for. It is probably on your terminal even if disconnected from your shell.

If any of the files is per-run and is closed at the end, you might be able to make a named pipe the target and track its life by the cat of the output out of the named pipe. Strace can tell you what is being closed at the end, too.

Calling fuser on files can find user processes, but it is a bit slow.

Last edited by DGPickett; 02-20-2013 at 04:50 PM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to run processes in parallel?

In a korn shell script, how can I run several processes in parallel at the same time? For example, I have 3 processes say p1, p2, p3 if I call them as p1.ksh p2.ksh p3.ksh they will run after one process finishes. But I want to run them in parallel and want to display "Process p1... (3 Replies)
Discussion started by: sbasak
3 Replies

2. UNIX for Advanced & Expert Users

Run away processes

Hi, My server runnning on SUN Solaris rel.5.5.1. I have been facing this issues for years. I have some Xbase databases running on the server. User is using emulation software to telnet to server for accessing application. If user logout application abnormally - by closing windows session, then... (2 Replies)
Discussion started by: lowtaiwah
2 Replies

3. UNIX for Advanced & Expert Users

script to run different shells which run different processes

Hi, Would like to ask the experts if anyone knows how to run a script like this: dtterm -title shell1 run process1 on shell1 dtterm -title shell2 run process2 on shell2 cheers! p/s: sorry if i used the wrong forum, quite concussed after watching world cup for several nights; but I... (2 Replies)
Discussion started by: mochi
2 Replies

4. UNIX for Dummies Questions & Answers

how can I run something as root (modprobe, to be exact) every time computer starts.

I have the root password for my box, but I'm ignorant. So, every time I start my computer, I have to run this command /sbin/modprobe fuse as su, so that I can do other stuff (like mount remote directories locally using sshfs) I guess there's some file, like .bashrc, only it's applicable... (4 Replies)
Discussion started by: tphyahoo
4 Replies

5. UNIX for Dummies Questions & Answers

Two questions. First one; What are the ways in which a program starts to run.

This is my first post here so hello everyone! I know that a command of the programs name can start a program and clicking on a icon in GUI can as well as a startup shell script but how do I educate myself of the method that starts an application? Does the GUI run a script? What are the ways/ way... (2 Replies)
Discussion started by: theKbStockpiler
2 Replies

6. UNIX and Linux Applications

how to run more than two processes parallely

I would like to call a function called CIRCLE which is further beind called by other function but in a loop that CIRCLE fuction is being called. And this CIRCLE function starts another process which takes 3 hours to complete again, if i put that process in nohup &, I can go to the next command... (2 Replies)
Discussion started by: venugopalsmartb
2 Replies

7. UNIX for Dummies Questions & Answers

Maximum no of processes that can run

Is there any limit in UNIX that only a MAXIMUM no of processes can run at a time? If so, it exceeds then what would be the error we would receive? (4 Replies)
Discussion started by: jansat
4 Replies

8. Shell Programming and Scripting

Array Variable being Assigned Values in Loop, But Gone when Loop Completes???

Hello All, Maybe I'm Missing something here but I have NOOO idea what the heck is going on with this....? I have a Variable that contains a PATTERN of what I'm considering "Illegal Characters". So what I'm doing is looping through a string containing some of these "Illegal Characters". Now... (5 Replies)
Discussion started by: mrm5102
5 Replies

9. Homework & Coursework Questions

When I run the script, the cursor starts on the wrong line?

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: It's a shell script using a looping logic, trap, tput, if, while. Most of the scripts in this book aren't written... (2 Replies)
Discussion started by: ckleinholz
2 Replies

10. Shell Programming and Scripting

Need to write a shell script that starts one, then kills it, then starts another?

This is on a CentOS box, I have two scripts that need to run in order. I want to write a shell script that calls the first script, lets it run and then terminates it after a certain number of hours (that I specify of course), and then calls the second script (they can't run simultaneously) which... (3 Replies)
Discussion started by: btramer
3 Replies
service(8)						      System Manager's Manual							service(8)

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. If the init script file does not exist, the script tries to use legacy actions. If there is no suitable legacy action found and COMMAND is one of actions specified in LSB Core Specification, input is redirected to the systemctl. Otherwise the command fails with return code 2. FILES
/etc/init.d The directory containing System V init scripts. ENVIRONMENT
LANG, TERM The only environment variables passed to the init scripts. SEE ALSO
chkconfig(8), ntsysv(8), systemd(1), systemctl(8), systemd.service(5) Jan 2006 service(8)
All times are GMT -4. The time now is 02:56 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy