Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Background job not working as expected
Top Forums UNIX for Dummies Questions & Answers Background job not working as expected Post 302916265 by shellscripting on Monday 8th of September 2014 11:59:54 AM
Old 09-08-2014
Background job not working as expected
Hello Unix Buddies,


Code:
cat infinite.sh

#!/bin/sh
while true
do
      echo "Infinite loop"
done

I am running it in the background
Code:
$ ./infinite.sh > /dev/null &
[1] 31634

Then i do an exit or click on the cross mark to close the session.

Now my expectation is that when i open up a new session, the process should not be running.

But to my surprise if i do a grep , then i see that the process is still running. I did not expect this result for the background job. I thought that when we exit from the shell the background job dies.

Code:
$ ps -ef | grep infinite
root     30496     1 90 11:47 ?        00:00:39 /bin/sh ./infinite.sh
root     30578 30559  0 11:47 pts/0    00:00:00 grep infinite

I am using Linux.

Please through some light here.

Thanks,
Last edited by shellscripting; 09-08-2014 at 01:21 PM..
This User Gave Thanks to shellscripting For This Post:
Scrutinizer
 

9 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

background job

I try to run a script as background job. script: #!/usr/bin/csh /usr/bin/date +20%y-%m-%d > ~/datsql.txt If I start it I got this output: tac> ./datermitteln& 293 + Stopped (SIGTTOU) ./datermitteln& I insert the following line inside my script, but without any... (3 Replies)
Discussion started by: joerg
3 Replies

2. UNIX for Dummies Questions & Answers

Background job

Hiya, Recently I've run a few scripts in the foreground, but have realised later they should of been better nohup'd and placed in the background. I understand how to change a foreground job into a background one, but how would put the job into the nohup state? Thanks (1 Reply)
Discussion started by: rdbooth
1 Replies

3. UNIX for Dummies Questions & Answers

background job

on gnome i open a terminal and run wget http://soommmething & in the background. because wget shows me downloading progress percentage and download speed continuously, I exit the gnome-terminal after a while i want to see the download percentage but dont know how. my ps -u myname shows that... (3 Replies)
Discussion started by: babayeve
3 Replies

4. Shell Programming and Scripting

how to get background job to foreground

hi, i am just wondering that wen we give the following code we make a process run in background...can the viceversa be performed?i.e can this be made foreground again # sleep 75& 21751 # (4 Replies)
Discussion started by: sandilya
4 Replies

5. Shell Programming and Scripting

Cannot submit a background job

Hi all, I am currently facing a problem when i am submitting a script to run in the background to collect statistics round the clock on an AIX box. I don't have root authority nor can I set it in cron. So when i submit the job, it runs fine, but won't let me signoff. It prompts me that... (2 Replies)
Discussion started by: tansha
2 Replies

6. Linux

resume the suspended background job

Hi, I was running a job in background and because of some immediate work to be done on my machine, I stopped the background job. The real problem comes when I try to restart the same job in the background. To stop I used stop PID and to resume the same I use bg PID when I do this the... (2 Replies)
Discussion started by: baloo_mia
2 Replies

7. UNIX for Advanced & Expert Users

Background job when completed

Hello - I submitted one background job last night and it completed today morning.I want to know exact time the job completed. I submitted backgroung job like this nohup cp -Rp /opt/apps/prod/proddb/proddata . & I want to know when above job completed on UNIX server.Above command... (9 Replies)
Discussion started by: Mansoor8810
9 Replies

8. Shell Programming and Scripting

Background Job

Hello Everyody, Having a doubt. sort file1 & when we sent a job to the background it returns Job Number PID again if we want to ... (1 Reply)
Discussion started by: knroy10
1 Replies

9. Shell Programming and Scripting

Background job issue

How to bring a backgroud job say sample_script.sh to foreground (4 Replies)
Discussion started by: rafa_fed2
4 Replies

LEARN ABOUT X11R4

zgrep

ZGREP(1)                                                      General Commands Manual                                                     ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep  options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other options specified are passed directly to grep.  If no file is specified,  then  the
       standard input is decompressed if necessary and fed to grep.  Otherwise the given files are uncompressed if necessary and fed to grep.

       If the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

                                                                                                                                          ZGREP(1)
All times are GMT -4. The time now is 03:01 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy