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Full Discussion: Unable to execute a function using trap
Top Forums UNIX for Advanced & Expert Users Unable to execute a function using trap Post 302312460 by smohandass on Friday 1st of May 2009 12:33:00 PM
Old 05-01-2009
Unable to execute a function using trap
I have a script A which calls script B. I wrote a function in script A to be executed when Kill command is issued for script A and I invoke that function using the trap command.The function identifies all child process running under script A (in this case script B) and kills the child process and performs some operation lets say it updates database tables and log files.

when i execute the "kill -15 script_A_pid" the function that i wrote in script A does not run. I think its because script B (child process) is running.

When i provide kill -15 script_b_pid then child process is terminated and the function that i wrote in script A gets executed.

I would like to know how to execute the function that i wrote in my script Aeven when my script B is running. I want to allways kill script A which should take care of killing script B.
 

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LEARN ABOUT DEBIAN

service

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 an environment as possible, removing most environment variables and with the 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 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  com-
       mand.

       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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