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Full Discussion: Help scripting to start, check, and restart processes
Top Forums Shell Programming and Scripting Help scripting to start, check, and restart processes Post 302533367 by MacG32 on Thursday 23rd of June 2011 12:15:10 PM
Old 06-23-2011
In my case, the -r only produces 1 additional chkscreen and java-daemon.sh process, and only 1 Java server process. When I changed the -r to -S, it kept making chkscreen and java-daemon.sh processes and no additional Java server processes. That's why I was trying to get and use the PIDs, using the second script in the OP.

If Java uses all of the machine's memory, then the screen will be terminated. I'll no longer be attached to it, so the check for being or not being attached may not be the approach needed. I'll try and use what you've kindly given me and integrate something to get and check the PIDs.

No need to be sorry and lose sleep over this. It'll get worked out eventually and I'll post the final tweaked results then. Below is what I'm using. Thanks a million for all of your help neutronscott.

chkscr
Code:
#!/bin/sh
# chkscr: checks if a screen session is running.

SESSION="server1"
DAEMON="screen -d -m -S $SESSION /home/*server*/*local*/jd.sh"

# does the session exist?
screen -r $SESSION -ls -q 2>&1 >/dev/null

if [ $? -le 10 ]; then
        echo "Restarting $DAEMON"
        $DAEMON
fi

jd.sh
Code:
#!/bin/sh
# jd.sh: restarts a stopped server.

while true; do
java *server variables*
wait
done

 

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LEARN ABOUT CENTOS

gnome-session-inhibit

GNOME-SESSION-INHI(1)						   User Commands					     GNOME-SESSION-INHI(1)

NAME

       gnome-session-inhibit - inhibit gnome-session functionality

SYNOPSIS

       gnome-session-inhibit [OPTION...] [COMMAND]

DESCRIPTION

       gnome-session-inhibit can inhibit certain gnome-session functionality while executing the given COMMAND. To achieve this, it calls the
       Inhibit() method of the gnome-session D-Bus API and creates an inhibitor. The inhibitor is automatically removed when gnome-session-inhibit
       exits.

       A typical use case is to prevent the session from going idle (and thus locking the screen) while a movie player is running.

OPTIONS

       -h, --help
	   print help and exit

       --version
	   print version information and exit

       --app-id ID
	   The application id to use when calling the gnome-session Inhibit() method. If this option is not specified, "unknown" is used.

       --reason REASON
	   A human-readable reason to pass along when calling the gnome-session Inhibit() method. If this option is not specified, "not specified"
	   is used.

       --inhibit ARG
	   ARG specifies the things to inhibit, as a colon-separated list. The possible values are logout, switch-user, suspend, idle, automount.
	   If this option is used more than once, the values are combined. If this option is not specified, "idle" is assumed.

       --inhibit-only
	   Do not launch COMMAND and wait forever instead

SEE ALSO

       systemd-inhibit(1)

gnome-session														     GNOME-SESSION-INHI(1)
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