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Full Discussion: How to export a variable from a child process running in background to the parent
Top Forums Shell Programming and Scripting How to export a variable from a child process running in background to the parent Post 302257431 by aixjadoo on Wednesday 12th of November 2008 06:41:35 AM
Old 11-12-2008
Question How to export a variable from a child process running in background to the parent
Hi All,

I have a script which calls a child script with a parameter to be run in the background

. childscript.ksh $a &

Can any one suggest me how do i export a variable from the child script to parent script?

Note that the child script is in background
If the child script is in foreground that is not an issue.

Also can any one suggest me how to get back the exit status (of say exit 0 ) from any of the functions in the child script to the parent script, again in this case the child script is running in the background.

Thanks
 

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LEARN ABOUT SUNOS

export

asadmin-export(1AS)						   User Commands					       asadmin-export(1AS)

NAME

       asadmin-export, export - marks a variable name for automatic export to the environment of subsequent commands in multimode

SYNOPSIS

       export  [ name=value  [ name=value]*]

       Marks  a variable name for automatic export to the environment of subsequent commands. All subsequent commands use the variable name values
       as specified; unless you unset them or exit multimode. If only the variable name is specified, the current value of that variable  name	is
       displayed.  If  the  export  command  is  used  without	any arguments, a list of all the exported variables and their values is displayed.
       Exported shell environment variables set prior to invoking the asadmin utility are imported automatically and  set  as  exported  variables
       within asadmin. Unexported environment variables cannot be read by the asadmin utility.

OPERANDS

       name=value	       variable name and value for automatic export to the environment to be used by subsequent commands.

       Example 1: Using export to list the environment variables

       asadmin> export AS_ADMIN_HOST=bluestar AS_ADMIN_PORT=8000 AS_ADMIN_USER=admin AS_ADMIN_PASSWORD=password
       asadmin> export AS_ADMIN_PREFIX=server1.jms-service
       asadmin> export //to list the environment variables that are set
       AS_ADMIN_HOST=bluestar
       AS_ADMIN_PORT=8000
       AS_ADMIN_USER=admin
       AS_ADMIN_PASSWORD=********
       AS_ADMIN_PREFIX=server1.jms-service

       Where:  the export command lists the environment variables that are set. In this case, the environment variables have been set to: the host
       is bluestar, the port is 8000, the administrator user is admin with an associated password, and the prefix is server1.jms-service.

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-unset(1AS), asadmin-multimode(1AS)

J2EE 1.4 SDK							    March 2004						       asadmin-export(1AS)
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