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Top Forums Shell Programming and Scripting How to ensure a script can only be invoked from another? Post 302608573 by chaitanya.gvc on Sunday 18th of March 2012 12:23:59 AM
Old 03-18-2012
How to ensure a script can only be invoked from another?

Hi All,

I have two scripts - ScriptA and ScriptB

ScriptA has logic to invoke ScriptB :
- with some parameter
- or without any parameter

ScriptB can also be invoked by the user from the command line.

Is there anyway to ensure that when I execute ScriptB from the command line, it does not work and shows an error saying that ScriptB cannot be run automatically but can only be invoked via ScriptA?

Thanks In Advance.
 

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service(8)						      System Manager's Manual							service(8)

NAME
service - run a System V init script SYNOPSIS
service SCRIPT COMMAND [OPTIONS] service --status-all service --help | -h | --version DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working directory set to /. The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start command. service --status-all runs all init scripts, in alphabetical order, with the status command. EXIT CODES
service calls the init script and returns the status returned by it. FILES
/etc/init.d The directory containing System V init scripts. ENVIRONMENT
LANG, TERM The only environment variables passed to the init scripts. SEE ALSO
/etc/init.d/skeleton, update-rc.d(8), init(8), invoke-rc.d(8). Jan 2006 service(8)
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