Read input from file and pass it to sub shell Post: 302889102

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Top Forums Shell Programming and Scripting Read input from file and pass it to sub shell Post 302889102 by abubucker0 on Wednesday 19th of February 2014 01:06:40 AM

02-19-2014

Registered User

Read input from file and pass it to sub shell

i have a scenario where in i have to monitor jobs which run in different servers, The job details(job name, host server, etc) are present in a dat file.
I have written a script a script which reads the details from the dat file and calls a local method where the job monitoring logic is present.
The script is working fine and the job are being monitored sequentially i.e one job at a time.

I want to monitor the jobs concurrently that is call the local method in a subshell so that each of the job is monitored concurrently.

i have added logic for creating subshell (appended & at the end of the method ) for each of the job but the jobs are still being monitored sequentially.

Is ther any other way of calling the local method in sub shell ?

Monitoring script

Code:

monitor_job()  {
 # Monitoring logic
 }

while IFS='|' read JOB_NAME DEST_HOST CONCURRENT
do
    if [[ -n "$JOB_NAME" && "$JOB_NAME" != *#* ]]
    then
            monitor_job $JOB_NAME $DEST_HOST $CONCURRENT
    fi
done < "$DAILY_JOBS"

Input dat file

Code:

##########################################################
## List of Daily Jobs that are to be monitored
#
## Job Name | Host Server | Concurrent Process
##########################################################

Job1|host1|&
Job2|host2|&
Job3|host3|&
Job4|host4|&
Job5|host5|&

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LEARN ABOUT OPENDARWIN

shell

shell(1F)							   FMLI Commands							 shell(1F)

NAME

       shell - run a command using shell

SYNOPSIS

       shell command [command] ...

DESCRIPTION

       The  shell  function  concatenate  its arguments, separating each by a space, and passes this string to the shell ($SHELL if set, otherwise
       /usr/bin/sh).

EXAMPLES

       Example 1: A sample output of shell command.

       Since the Form and Menu Language does not directly support background processing, the shell function can be used instead.

       `shell "build prog > /dev/null &"`

       If you want the user to continue to be able to interact with the application while the background job is running, the  output  of  an  exe-
       cutable	run  by shell in the background must be redirected: to a file if you want to save the output, or to /dev/null if you don't want to
       save it (or if there is no output), otherwise your application may appear to be hung until the background job finishes processing.

       shell can also be used to execute a command that has the same name as an FMLI built-in function.

NOTES

       The arguments to shell will be concatenate using spaces, which may or may not do what is expected. The variables set in local  environments
       will not be expanded by the shell because "local" means "local to the current process."

ATTRIBUTES

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       sh(1), attributes(5)

SunOS 5.10							    5 Jul 1990								 shell(1F)

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