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Full Discussion: Put currently running script into background
Top Forums Shell Programming and Scripting Put currently running script into background Post 302979786 by JackK on Friday 19th of August 2016 02:50:05 AM
Old 08-19-2016
Wrench Put currently running script into background
Hi All,
Suppose I have a script and inside it I want/need to put it into background. I need the script to not react to SIGHUP signals.
I tried:
Code:
#!/bin/bash
echo "" > test_disown
mypid=$$
echo "PID=$mypid"
(
kill -SIGSTOP $mypid
jobs > myjobs
#disown -h <job-spec>
#kill -SIGCONT $mypid
) &
while [ 1 ]; do
        echo $(date) >> test_disown
        sleep 10
done

When I run this script I have the output:
Code:
'disown' test
PID=7083
 [4]+  Stopped                 ./test.sh

Now from the console I can do "bg %4" and the script runs in background.
I want to run bg from the script, but I don't know the job-spec number of my stopped script.
The line "jobs > myjobs" created empty file myjobs.
How to overcome this?

Please help,
Jacek
 

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LEARN ABOUT OPENSOLARIS

disown

disown(1)							   User Commands							 disown(1)

NAME

       disown - ksh93 built-in function to disassociate a job with the current shell

SYNOPSIS

       disown [job ...]

DESCRIPTION

       The  ksh93  disown command prevents the current shell from sending a HUP signal to each of the specified jobs when the current shell termi-
       nates a login session.

       If job is omitted, disown sends the HUP signal to the most recently started or stopped background job.

OPERANDS

       The following operands are supported:

       job    Specifies the job or jobs on which disown operates.

	      Specify job as one of the following:

	      number	  Refers to a process ID.

	      -number	  Refers to a process group ID.

	      %number	  Refers to a job number.

	      %string	  Refers to a job whose name begins with string.

	      %?string	  Refers to a job whose name contains string.

	      %+ or %%	  Refers to the current job.

	      %-	  Refers to the previous job.

EXIT STATUS

       0     Successful completion.

       >0    One or more specified jobs does not exist.

EXAMPLES

       Example 1 Disowning a Job

       The following example disowns job 1:

	 example% disown %1

AUTHORS

       David Korn, dgk@research.att.com

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Uncommitted		   |
       +-----------------------------+-----------------------------+

SEE ALSO

       bg(1), jobs(1), ksh93(1), wait(1), attributes(5)

SunOS 5.11							    18 Apr 2007 							 disown(1)
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