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Top Forums Shell Programming and Scripting Flock preventing function to work Post 302993831 by Chubler_XL on Tuesday 14th of March 2017 09:33:55 PM
Old 03-14-2017
What is happening? Are you getting an error something like DEBUG: command not found or are you just not seeing any output?

Perhaps fping is causing the issue - I don't have it installed here so I replaced the fping line with sleep 5 and it works fine:

Code:
$ cat batchenr
function DEBUG() {
echo "
==============================
$(date)
=============================="
echo  "RSULTE:  $RESULTS"
}

(
flock -x -w 3 200 || exit 1
sleep 5
RESULTS=Testing
DEBUG
) 200>/tmp/.myscript.exclusivelock

$ ./batchenr

==============================
Wed, Mar 15, 2017  1:30:50 AM
==============================
RSULTE:  Testing
$

 

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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 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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