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Full Discussion: How to limit the number of running instances of a script?
Top Forums Shell Programming and Scripting How to limit the number of running instances of a script? Post 52767 by oti on Friday 25th of June 2004 09:00:40 AM
Old 06-25-2004
How to limit the number of running instances of a script?
I would like to allow only one instance of a script to run at any moment.

I've tried the following solution to count the instances but the result is always the number of running instances plus one and I can't find the problem

Code:
ps -ef | grep $0 | sed '/^$/ d' | sed '/grep/ d' | wc -l

Please help. Thanks!
 

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LEARN ABOUT SUNOS

asadmin-list-instances

asadmin-list-instances(1AS)					   User Commands				       asadmin-list-instances(1AS)

NAME

       asadmin-list-instances, list-instances - lists all the instances in the server

SYNOPSIS

       list-instances  [--user	admin_user]  [--password  admin_password]  [--host localhost] [--port 4848] [--domain domain_name] [--local=false]
       [--passwordfile filename] [--secure|-s]

       Use the list-instances to list all the instance in the server. The list-instances command can be run both locally and  remotely.   To  list
       remote  instances,  the named administration server must be running on the hostname and port number specified. The user authenticates using
       the password identified for the administration server.

OPTIONS

       --user		       administrative user associated for the instanace.

       --password	       administrative password corresponding to the administrative user.

       --host		       host name of the machine hosting the administrative instance.

       --port		       port number associated with the administrative host.

       --domain 	       name of the domain.

       --local		       determines if the command should delegate the request to administrative instance or run locally.

       --passwordfile	       file containing passwords appropriate for the command (e.g., administrative instance).

       --secure 	       if true, uses SSL/TLS to communicate with the administrative instance.

       Example 1: Using list-instances in local mode

       asadmin> list-instances --domain1 --local
       admin-server running
       server1 running

       Where: the server1 and admin-server instances for the domain1 domain is listed.

       Example 2: Using list-instances in remote mode

       asadmin> list-instances --user admin --passwordfile passwords.txt --host localhost --port 4848
       server1 [mayank:80] running

       Where: the server1 instance associated with the specified user, passwords, host, and  port  number  specified  is  listed  for  the  remote
       machine.

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

INTERFACE EQUIVALENT

       Server Instance page

       asadmin-show-instance-status(1AS)

J2EE 1.4 SDK							    March 2004					       asadmin-list-instances(1AS)
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