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Full Discussion: Script to restart a process
Top Forums Shell Programming and Scripting Script to restart a process Post 302580845 by Sekullos on Saturday 10th of December 2011 06:24:05 AM
Old 12-10-2011
I might be wrong but I see a flaw in your contrôl.

Your contrôl is based on this check :
Code:
if [ $INCEPT -gt 0 ]

$INCEPT being the value of your watched log_file. What happens if the process who feeds your log file crashs? Or if the application fucks up and don't have anything else to feed to your log_file?

Your log file will still be greater than 0 and your script won't detect it.

I was thinking of a similar script for work with the same check on a log file (ls -lrt | awk '{print $5}' )
but instead of checking the current value, I compare the new value to the previous one (just by redirecting old value to random file > old_value) and if it's equal to the previous value => restart.

Something like this

Code:
NEW_VALUE=`ls -lrt $LOG_FILE |awk '{print $5}'`
OLD_VALUE=$(cat /filesystem/scripts/old_value)

if [ $NEW_VALUE = $OLD_VALUE ]
   then
          echo "bla bla, not working"
          # restart process
   else
          echo "Log check ok, incrementing"
          $NEW_VALUE > "/filesystem/scripts/old_value"
fi

Might need a little tweaking or add a count so that it only restarts the process after 2 failed checks or something.


Just an idea anyway.
Last edited by Sekullos; 12-10-2011 at 07:55 AM..
 

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LEARN ABOUT OPENSOLARIS

gdm-stop

gdm-restart(1m) 						   User Commands						   gdm-restart(1m)

NAME

       gdm-restart, gdm-safe-restart, gdm-stop - stop or restart GDM

SYNOPSIS

       gdm-restart

       gdm-safe-restart

       gdm-stop

DESCRIPTION

       gdm-restart stops and restarts GDM by sending a HUP signal to the GDM daemon. This command immediately terminates all sessions and logs out
       users currently logged in with GDM.

       gdm-safe-restart stops and restarts GDM by sending a USR1 signal to the GDM daemon. GDM is restarted as soon as all users log out.

       gdm-stop stops GDM by sending a TERM signal to the GDM daemon.

FILES

       The following files are used by this application:

       /usr/bin/gdm-restart	       Executable to stop and restart GDM

       /usr/bin/gdm-safe-restart       Executable to stop and restart GDM safely

       /usr/bin/stop		       Executable to stop GDM

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-display-mgr	   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Volatile			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       Latest version of the GNOME Desktop User Guide for your platform.

       gdmXnestchooser(1), gdmdynamic(1), gdmflexiserver(1), gdmphotosetup(1), gdmthemetester(1), gdm(1m), gdmsetup(1m), attributes(5)

NOTES

       Written by Brian Cameron, Sun Microsystems Inc., 2004, 2006.

SunOS 5.11							    1 Sep 2004							   gdm-restart(1m)
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