Sponsored Content
Top Forums UNIX for Dummies Questions & Answers Script to start background process and then kill process Post 302428073 by holocene on Tuesday 8th of June 2010 06:38:54 PM
Old 06-08-2010
Script to start background process and then kill process

What I need to learn is how to use a script that launches background processes, and then kills those processes as needed.

The script successfully launches the script. But how do I check to see if the job exists before I kill it?

I know my problem is mostly failure to understand parameter expansion and conditionals.

Best Regards
Steve.

Code:
#!/bin/bash

operation="go"
while [ "$operation" != "quit" ]; do
    echo -n 'Enter Operation '
    read operation    

    case $operation in
        "start testing" )
##Start a process
            echo "starting testing"
            ./testing.scr &
                    ;;
        "stop testing" )
##Stop a process

#check to see if process exists. kill if exists, warn if it does not
            if [ "$(ps | grep testing.scr)" -ne "" ]; then
            kill $(ps | grep testing.scr | cut -d' ' -f 2)
                else
                    echo "job does not exist"
            fi            
                    ;;                    
                    
        * )
            echo "error keyed"
        ;;
    esac
done

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

capture the process id when starting a background process

Hello all, How do I start a background process and save the process id to a file on my system. For example %wait 5 & will execute and print the process id. I can't figure out how to get it to a file. I've tried: > filename 0>filename 1>filename. Any assistance is most appreciated. Thanks, Jim... (10 Replies)
Discussion started by: jleavitt
10 Replies

2. Shell Programming and Scripting

how to start a process and make it sleep for 5 mins and then kill that process

how to start a process and make it sleep for 5 mins and then kill that process (6 Replies)
Discussion started by: shrao
6 Replies

3. Shell Programming and Scripting

Script - How to automatically start another process when the previous process ends?

Hi all, I'm doing automation task for my team and I just started to learn unix scripting so please shed some light on how to do this: 1) I have 2 sets of datafiles - datafile A and B. These datafiles must be loaded subsequently and cannot be loaded concurrently. 2) So I loaded datafile A... (10 Replies)
Discussion started by: luna_soleil
10 Replies

4. Shell Programming and Scripting

How to kill background process

Hi, I am new to scripting and learning. please share your knowledge with me. I have a scenario, that i need to trace whether the background script is still running or not? if it was running i need to kill it. i am using the below scripts , but it is not working i dont know why :confused:.... (4 Replies)
Discussion started by: G.K.K
4 Replies

5. Shell Programming and Scripting

Shell Script to Kill Process(number of process) Unix/Solaris

Hi Experts, we do have a shell script for Unix Solaris, which will kill all the process manullay, it used to work in my previous env, but now it is throwing this error.. could some one please help me to resolve it This is how we execute the script (and this is the requirement) ... (2 Replies)
Discussion started by: jonnyvic
2 Replies

6. Shell Programming and Scripting

Script to Kill a Process by Name...

Hello all... new to these forums and a bit of a newbie with linux aswell. I need to figure out how to write a shell script to kill a process by name as given to the script as an argument. I've got that part working OK, but i need to make sure that the script does not allow processes that are... (6 Replies)
Discussion started by: cannon1707
6 Replies

7. Linux

How to kill background process?

Hi I have one file one.sh. In one.sh file their are 5 perl script 1.pl, 2.pl, 3.pl,4.pl, 5.pl. I ran the one.sh file in background and now I want to kill the one.sh file after 5 min. but its not killing the processs. Please let me know how to kill the background process. (2 Replies)
Discussion started by: lakshmikant
2 Replies

8. Shell Programming and Scripting

grep the process id and kill all the filtered process

Hi I want to write a shell script which can find the process id's of all the process and kill them eg: ps ax | grep rv_ 3015 ? S 0:00 /home/vivek/Desktop/rv_server 3020 ? S 0:00 /home/vivek/Desktop/rv_gps 3022 ? S 0:00 /home/vivek/Desktop/rv_show ... (7 Replies)
Discussion started by: vivek_naragund
7 Replies

9. Shell Programming and Scripting

How to put FTP process as a background process/job in perl?

Hi, I am using net::ftp for transferring files now i am trying in the same Linux server as a result ftp is very fast but if the server is other location (remote) then the file transferred will be time consuming. So i want try putting FTP part as a background process. I am unaware how to do... (5 Replies)
Discussion started by: vanitham
5 Replies

10. Shell Programming and Scripting

Make background process interact with fg process

Hi, I have written a menu driven shell script in which as per the choice, I run the another script on background. For eg: 1. get info 2)process info 3)modify info All the operations have different scripts which i schedule in background using &. However I wish to display the error... (0 Replies)
Discussion started by: ashima jain
0 Replies
KILLALL(1)						    BSD General Commands Manual 						KILLALL(1)

NAME
killall -- kill processes by name SYNOPSIS
killall [-delmsvz] [-help] [-u user] [-t tty] [-c procname] [-SIGNAL] [procname ...] DESCRIPTION
The killall utility kills processes selected by name, as opposed to the selection by pid as done by kill(1). By default, it will send a TERM signal to all processes with a real UID identical to the caller of killall that match the name procname. The super-user is allowed to kill any process. The options are as follows: -d | -v Be more verbose about what will be done. For a single -d option, a list of the processes that will be sent the signal will be printed, or a message indicating that no matching processes have been found. -e Use the effective user ID instead of the (default) real user ID for matching processes specified with the -u option. -help Give a help on the command usage and exit. -l List the names of the available signals and exit, like in kill(1). -m Match the argument procname as a (case sensitive) regular expression against the names of processes found. CAUTION! This is dangerous, a single dot will match any process running under the real UID of the caller. -s Show only what would be done, but do not send any signal. -SIGNAL Send a different signal instead of the default TERM. The signal may be specified either as a name (with or without a lead- ing SIG), or numerically. -u user Limit potentially matching processes to those belonging to the specified user. -t tty Limit potentially matching processes to those running on the specified tty. -c procname When used with the -u or -t flags, limit potentially matching processes to those matching the specified procname. -z Do not skip zombies. This should not have any effect except to print a few error messages if there are zombie processes that match the specified pattern. ALL PROCESSES
Sending a signal to all processes with uid XYZ is already supported by kill(1). So use kill(1) for this job (e.g. $ kill -TERM -1 or as root $ echo kill -TERM -1 | su -m <user>) EXIT STATUS
The killall command will respond with a short usage message and exit with a status of 2 in case of a command error. A status of 1 will be returned if either no matching process has been found or not all processes have been signalled successfully. Otherwise, a status of 0 will be returned. DIAGNOSTICS
Diagnostic messages will only be printed if requested by -d options. SEE ALSO
kill(1), sysctl(3) HISTORY
The killall command appeared in FreeBSD 2.1. It has been modeled after the killall command as available on other platforms. AUTHORS
The killall program was originally written in Perl and was contributed by Wolfram Schneider, this manual page has been written by Jorg Wunsch. The current version of killall was rewritten in C by Peter Wemm using sysctl(3). BSD
January 26, 2004 BSD
All times are GMT -4. The time now is 04:48 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy