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Full Discussion: usage of ps -ef
Top Forums UNIX for Advanced & Expert Users usage of ps -ef Post 302212611 by risshanth on Tuesday 8th of July 2008 02:41:57 AM
Old 07-08-2008
usage of ps -ef
Hi,
I can have only one instance of my script running at any point of time. So I have :
SCRIPT_NAME=$0
if [ `ps -ef | grep " ${SCRIPT_NAME}" | grep -v "grep" | wc -l` -gt 1 ]; then
echo "The process $0 is already running. Aborting the current instance of the job $0"
exit 1

fi


And in the last line of the script i had given exit 0

At times, though the script is not running, i get an error "The process is already running ..." and my script get aborted. So wat can be done for this ?

My requirement is I will scheudle this scirpt in autosys and will be executed every half an hour. And only one instance of the script should be executed at any point of time.

Can any one please help me ??

thanks in advance.
 

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LEARN ABOUT OPENSOLARIS

script

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 5.11							    30 Jan 2004 							 script(1)
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