linux service script for storing uptime Post: 302480369

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Homework and Emergencies Homework & Coursework Questions linux service script for storing uptime Post 302480369 by methyl on Tuesday 14th of December 2010 04:41:39 PM

12-14-2010

Registered User

To run a Shell script as a service.

Code:

nohup /path/scriptname & ; PID=$?
#Don't forget to record the PID in a file because we will need it on shutdown.

Some pointers:

1) Check with your tutor
Is using the unix "uptime" command allowed?

2) How do you stop the process?
Some prefer using a "semaphore" file which when it exists causes the script to remove the file then exit.
Others prefer using a Shell "trap" command and issuing say a "kill -15" to stop the script.
I use both. Sometimes you can't wait for a poll.

3) Here is an example of continuous operation of a Shell script as a Service.

Code:

MYEXIT ()
{
if [ -f /var/tmp/exit_uptime_monitor ]
then
       rm /var/tmp/exit_uptime_monitor
fi
exit
}
#
trap 'MYEXIT' 1 2 3 15
#
#
while true
do
       # Check whether we need to exit
       if [ -f /var/tmp/exit_uptime_monitor ]
       then
              break
       fi
       #
       #
       # Check whether we have been told of a reboot
       # Hint process the "start" parameter if this is a rc script.
       #
       #
       # Do my process here
       #
       #
       sleep 60             # Seconds
done
#
# Clean up and exit
MYEXIT

4) Can your process keep running ?
This is unix. Uptime in months and years is not unusual.

5) If you are using rc scripts
You have a S script to get things started on reboot.
Don't forget to have a K script which issues an appropriate "kill -15"
to get stop the background script quickly.

methyl

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LEARN ABOUT ULTRIX

lmfsetup

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

Name
lmfsetup - License Management Facility PAK registration script

Syntax
/etc/lmfsetup [ template ]

Description
The script allows you to register data supplied by a Product Authorization Key (PAK). The script prompts you for the data associated with
each of the fields on a PAK. When all the data has been entered, the License Management Facility (LMF) ensures there are entries against
all the mandatory fields, and that the Checksum validates all the license data. If the data has been entered correctly, the PAK is regis-
tered in the License Database. If the data has been entered incorrectly, the appropriate error message is displayed and you are given the
opportunity to re-enter the data.

The template option allows you to register license data from templates in A template containing a partially complete PAK is created by some
products as part of their installation process. The script only prompts you for data on the fields that are empty in the template. If the
script cannot find the specified template in it searches the current directory.

The script is provided as an alternative to the command. This displays a template, which includes the fields on the PAK, and invokes an
editor so that you can add the license data to the appropriate field. The command also allows errors to be corrected without having to re-
enter all the data.

See Also
lmf(8)
Guide to Software Licensing

lmfsetup(8)

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