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Top Forums Shell Programming and Scripting How to run Background process one after another Post 302594791 by knight_eon on Wednesday 1st of February 2012 07:31:17 AM
Old 02-01-2012
Here would be the Algo:

1. Run the SCP command in background
2. Store the PID of the SCP Job (in Shell, PID of immediate backgrounded job can be derived by: BGPROC_PID=$!
3. Monitor the processes in a loop for the presence of above Backgrounded process

Here is equivalent UNIX Code
Code:
 
scp -r machinename:/PathOfFile/ /Path/WhereToCopyIt/  1>/dev/null 2>/dev/null &
BGPID=$!
 
while [ 1 ]; do
    PR_EX=$(ps -ef | awk -v BGPID=${BGPID} '{if ($2 == BGPID) print "Process with PID '"$BGPID"' exists"}')
    if [[ ${PR_EX} = "Process with PID $BGPID exists" ]]; then
       echo "Waiting for the Process with PID ${BGPID} to complete its execution"
       echo "Sleeping for 5 Seconds"
       sleep 5
       continue
    else
       echo "Process with PID ${BGPID} executed successfully"
       break
    fi
done

 

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Extratags(3pm)						User Contributed Perl Documentation					    Extratags(3pm)

NAME
CGI::Extratags - Useful Extensions for the CGI Module SYNOPSIS
use CGI::Extratags; $cgi = new CGI::Extratags; print $cgi -> email ('racke@linuxia.de'); print $cgi -> jump ('CONTACT', 'contact us'); print $cgi -> mark ('CONTACT', $cgi -> h2 ('How to contact us')); print $cgi -> row ('Date', 18, 1, 1966); print $cgi -> recall ('Debian CD', artnum => '0-123456'); DESCRIPTION
CGI::Extratags adds several useful methods to the CGI class. email ADDRESS print $cgi -> email ('racke@linuxia.de'); Produces HTML code for a link to an email ADDRESS. jump MARK TEXT print $cgi -> jump ('CONTACT', 'contact us'); Produces HTML code for a link pointing to a target within the current document. mark NAME TEXT print $cgi -> mark ('CONTACT', $cgi -> h2 ('How to contact us')); Generates target NAME for hyperlinks. row [ITEM ...] print $cgi -> row ('Date', 18, 1, 1966); Produces HTML code for a table row with ITEM arguments as cell contents. recall TEXT [NAME [VALUE]] ... foreach my $num (sort (keys %artmap)) { print $cgi -> recall ($artmap{$num}, artnum => $num); print $cgi -> br; } Produces a link to the script itself labeled with TEXT. The NAME/VALUE pairs will be passed as parameters. AUTHOR
Stefan Hornburg, racke@linuxia.de SEE ALSO
perl(1), URI::Escape(3), CGI(3). perl v5.8.4 2004-07-11 Extratags(3pm)
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