Sponsored Content
Top Forums Shell Programming and Scripting How to add conditional check of whether a process is running before doing rest of script? Post 302854067 by Corona688 on Monday 16th of September 2013 05:17:56 PM
Old 09-16-2013
This is what PID files are generally used for.

When you start the first process, save its PID into a file in /var/run/processname.pid to check later.

Next time you want to start another, check

Code:
if [ -f /var/run/processname.pid ] && read PID < /var/run/processname.pid && ps "$PID" >/dev/null 2>/dev/null
then
        echo "Already running as PID $PID"
        exit 1
fi

This User Gave Thanks to Corona688 For This Post:
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

script to check for a particular process and alert if its not running

Hai Friends, I have to develop a script that checks for a particular process say x.exe once every day and report if its not running say through a blat mail. I need this to run in a given list of pc from a single point. Any suggestion of how to go abt this Thnx for any help (1 Reply)
Discussion started by: goks
1 Replies

2. UNIX for Advanced & Expert Users

how to check if a process is running in a server from shell script.

I want to write a unix shell script that will check if a process (say debu) is running in the server or not. If no , then send a mail to the corresponding person to start the process??? (2 Replies)
Discussion started by: debu
2 Replies

3. Shell Programming and Scripting

script to check if process is running

How do I make a shell script to see if a certain process is running. The process shows up on ps aux as /usr/sbin/daemon eg: if /usr/sbin/daemon else #nothin basically i want to run the process if it isnt running/ has been stopped. Thanks. (2 Replies)
Discussion started by: daydreamer
2 Replies

4. Shell Programming and Scripting

How to write an expect script to check if a process is running?

I'm new to expecting and i want to create a script to ssh to a device,check is a process is running and display that the process is running or not.This is what i have so far After executing this script i get an error. #!/usr/bin/expect set timeout -1 set ip "machine ip goes here" set... (5 Replies)
Discussion started by: icchi
5 Replies

5. Programming

How do I check if a process is running in C

How to I check if a process is running in C? I'm trying to use ps aux |grep "process name" but failing in doing that. How do I do that? Thanks, (1 Reply)
Discussion started by: cprogdude
1 Replies

6. Shell Programming and Scripting

Script to check running of process

Hi, Can anyone please tell me how to write a shell script to check whether a process if running or not.... if its still running then wait for sometime and if not then run the next query. Also, Under my one main script main.sh I have to run 2 scripts simutaneously which take some time to... (2 Replies)
Discussion started by: lovepujain
2 Replies

7. Shell Programming and Scripting

Simple Script to Check running Process

#!/bin/sh CHECK='ps aux | grep start.jar | grep -v grep | wc -l' if then /usr/local/jre-1.7.0/bin/java - jar start.jar & else fi Could anybody advise whats up with this code im trying to put this in as a cron job to check that solr search engine is running every 10secs and if... (10 Replies)
Discussion started by: will_123
10 Replies

8. UNIX for Dummies Questions & Answers

How a process can check if a particular process is running on different machine?

I have process1 running on one machine and generating some log file. Now another process which can be launched on any machine wants to know if process1 is running or not and also in case it is running it wants to stream the logs file generated by process1 on terminal from which process2 is... (2 Replies)
Discussion started by: saurabhnsit2001
2 Replies

9. Shell Programming and Scripting

ksh script to check if certain process is running

I have to kill the process "test" for a maintenance I do but want the script to check when it comes back up. I can get what I want when I run this while loop: while true;do ps -ef | grep test | grep -v grep | sed -e 's/^*//';sleep 60;done but I want the script to do it for me and as soon as... (6 Replies)
Discussion started by: seekryts15
6 Replies

10. Web Development

Javascript to check field is empty then execute rest of script

I have found this bit of code that nearly does what I want. Basically 3 input fields, I want to copy t2 to t3 as it's typed but only if t1 contains data AND t3 is empty: <input type="text" id="t1" /> <input type="text" id="t2" /> <input type="text" id="t3" /> <script> var t2 =... (4 Replies)
Discussion started by: barrydocks
4 Replies
SHUNIT2(1)																SHUNIT2(1)

NAME
shunit2 - A unit test framework for shell scripts SYNOPSIS
shunit2 unitfile DESCRIPTION
shUnit2 is a xUnit unit test framework for Bourne based shell scripts, and it is designed to work in a similar manner to JUnit, PyUnit, etc.. If you have ever had the desire to write a unit test for a shell script, shUnit2 can do the job. You can either run shunit2 directly from the commandline and specify the unit file or directly source the shunit2 executable. If you directly execute shunit2 and don't specify a unitfile shunit2 assumes a empty testfile and will return without an error message. EXAMPLE
Simple script to test if 1 equals 1 #! /bin/sh testEquality() { assertEquals 1 1 } # load shunit2 . shunit2 Execute shUnit2 unit tests directly from the commandline shunit2 /path/to/unit/file OPTIONS
shunit2 does not support any commandline options at all. You can either source shunit2 to execute your unit tests or directly run shunit2 as a commandline script. SEE ALSO
For more information see http://code.google.com/p/shunit2/ or have a look at the installed documentation in /usr/share/doc/shunit2/ AUTHOR
shunit2 was written by Kate Ward <kate.ward@forestent.com>. This manpage was written by Ulrich Dangel <mru@spamt.net>. 2.1.6 03/25/2012 SHUNIT2(1)
All times are GMT -4. The time now is 03:50 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy