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Full Discussion: Check hung process and restart
Homework and Emergencies Emergency UNIX and Linux Support Check hung process and restart Post 302634105 by hedkandi on Thursday 3rd of May 2012 12:51:38 AM
Old 05-03-2012
Check hung process and restart
Hi all

I have networker running on a RHEL 5.7 and over time it hangs. So the solution backup team proposed is to check if the process is hung, to stop and start it.

Unfortunately for me, the rc script only allows three commands, start, stop and status (no restart option) so I managed to set following script but when I executed it-even when networker has been stopped I get the OK message in my /var/log/messages. Why is that? Can someone please help me look into this? Where did I go wrong? Sorry I am rushing this, they need to get this setup on prod servers by today at COB...


Code:
#!/bin/bash
cmdstop='/etc/rc.d/init.d/networker stop'
cmdstart='/etc/rc.d/init.d/networker start'

if [ "${?}" != 0 ] ; then
 echo "`date` CRITICAL:Networker hung, will be restarted" >>/var/log/messages
$cmdstart
 else
echo "`date` OK:Networker running" >>/var/log/messages
fi
exit

 

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LEARN ABOUT OPENSOLARIS

gdm-safe-restart

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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