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Top Forums Shell Programming and Scripting Help scripting to start, check, and restart processes Post 302532696 by neutronscott on Tuesday 21st of June 2011 08:54:05 PM
Old 06-21-2011
Having screen as part of the equation at first seemed difficult for me. Then I read the manual...

Firstly, we create the crontab-able script which checks if the screen session is started.

Code:
#!/bin/sh
# chkscreen: checks if a screen session is running.
SESSION="server1"
DAEMON="screen -d -m -S $SESSION /home/mute/test/java-daemon.sh"

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

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

Then java-daemon.sh is your while looping deal, which hopefully doesn't die since it'd restart your java faster than waiting for cron job.

Code:
#!/bin/sh
# java-daemon.sh: keeps restarting a buggy server... ;)

while true; do
./java
done

So then you'll place chkscreen inside of /etc/init.d/rc.local to start with the server, and inside of crontab.

mute@geek:~/test$ crontab - <<__EOF__
> */15 * * * * /home/mute/test/chkscreen
> __EOF__

Guaranteed to work on my machine!

Sorry I'm no guru myself but unless someone else replies this is what you're stuck with Smilie
This User Gave Thanks to neutronscott For This Post:
 

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FREEMIND(1)						      General Commands Manual						       FREEMIND(1)

NAME
freemind -- A Java program for creating and viewing mindmaps. SYNOPSIS
freemind [no_options] DESCRIPTION
This manual page documents briefly the freemind command. This manual page was written for the Debian distribution because the original program does not have a manual page. Instead, it has docu- mentation as a mindmap (see Help menu in FreeMind). freemind is a program that allows to create and view so-called mindmaps, as well as export them to HTML or different image formats. It also has a plugin concept to extend its functionality. OPTIONS
This program does not have any option. Just start it! ENVIRONMENT VARIABLES
DEBUG If this environment variable is set, freemind gives more information on how it finds its different elements, as well as some other information. JAVACMD Default value for the java virtual machine (the java command). JAVA_BINDIR If $JAVACMD is not set, the java virtual machine is searched under $JAVA_BINDIR/java. JAVA_HOME If $JAVACMD and $JAVA_BINDIR are not set, the java virtual machine is searched under $JAVA_HOME/bin/java. PATH If all $JAVA... environment variables fail, the java virtual machine command (java) is searched in the $PATH (with which). CLASSPATH ADD_JARS The $CLASSPATH variable also lets one specify additional jars, which is good, if you want to add a new Look&Feel jar (the motif one is so ugly...). Alternatively, the content of $ADD_JARS will be prepended to $CLASSPATH. FREEMIND_BASE_DIR Directory where FreeMind searches for its plugins and libraries FILES
/etc/freemind/freemindrc ~/.freemind/freemindrc freemind tries to read its environment variables from /etc/freemind/freemindrc and ~/.freemind/freemindrc, so that specific set- tings are possible at machine and user level. /usr/bin/java If all searches through environment variables fail, the java virtual machine is expected to be /usr/bin/java; if not, freemind exits with an error. SEE ALSO
The online documentation under http://freemind.sf.net/, especially the Linux related one under the Wiki page link http://freemind.source- forge.net/wiki/index.php/FreeMind_on_Linux. AUTHOR
This manual page was written by Eric Lavarde deb@zorglub.s.bawue.de for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version pub- lished by the Free Software Foundation. On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL. FREEMIND(1)
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