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Full Discussion: Daemon process
Top Forums Programming Daemon process Post 302857301 by inventsekar on Thursday 26th of September 2013 02:04:28 AM
Old 09-26-2013
Hi Sundaresh,
I am not sure exactly if this helps...but let me give an idea...
I assume you have a script which you wanted to run on background, only one instance of it.

# inside the script, you will add these few lines to check if the script is already running
Code:
COUNT=`ps -ef SCRIPT_NAME | wc -l`
if [ "$COUNT" -eq 0 ]
then
  # run the script
 /full/path/SCRIPT_NAME &
else
  echo "Already an instance of the script is running"
fi
exit 0


Last edited by Franklin52; 09-26-2013 at 03:11 AM.. Reason: Please use code tags
 

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script(1)							   User Commands							 script(1)

NAME
script - make record of a terminal session SYNOPSIS
script [-a] [filename] DESCRIPTION
The script utility makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the record is saved in the file typescript. See WARNINGS. The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends when the forked shell exits or when Control-d is typed. OPTIONS
The following option is supported: -a Appends the session record to filename, rather than overwriting it. NOTES
script places everything that appears on the screen in filename, including prompts. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |Enabled | +-----------------------------+-----------------------------+ SEE ALSO
attributes(5) WARNINGS
script can pose a security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a privileged user, that is, root. Be sure that typescript is not a link before running script. SunOS 5.10 30 Jan 2004 script(1)
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