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Full Discussion: How to prevent job1 from running while job2 is running..
Top Forums UNIX for Advanced & Expert Users How to prevent job1 from running while job2 is running.. Post 302088731 by blowtorch on Thursday 14th of September 2006 05:40:13 AM
Old 09-14-2006
Code:
# cat one.sh
#!/bin/ksh

if [ -f /tmp/lockfile ]; then
        exit
fi
touch /tmp/lockfile
echo "Process one doing work..."
sleep 10
echo "Process one completed work..."
rm /tmp/lockfile
# cat two.sh
#!/bin/ksh

if [ -f /tmp/lockfile ]; then
        exit
fi
touch /tmp/lockfile
echo "Process two doing work..."
sleep 10
echo "Process two completed work..."
rm /tmp/lockfile
# ./one.sh &
[1] 7377
# Process one doing work...

# ./two.sh
# ./two.sh
Process one completed work...
# ./two.sh
Process two doing work...
Process two completed work...
#

As you can see, process two, didn't start as long as process one was running.
 

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LEARN ABOUT DEBIAN

gnome-screensaver-command

gnome-screensaver-command(1)				      General Commands Manual				      gnome-screensaver-command(1)

NAME

       gnome-screensaver-command - controls GNOME screensaver

SYNOPSIS

       gnome-screensaver-command [OPTION...]

DESCRIPTION

       gnome-screensaver-command is a tool for controlling an already running instance of gnome-screensaver.

OPTIONS

       --exit Causes the screensaver to exit gracefully

       -q, --query
	      Query the state of the screensaver

       -t, --time
	      Query the length of time the screensaver has been active

       -l, --lock
	      Tells the running screensaver process to lock the screen immediately

       -a, --activate
	      Turn the screensaver on (blank the screen)

       -d, --deactivate
	      If the screensaver is active then deactivate it (un-blank the screen)

       -V, --version
	      Version of this application

AUTHORS

       gnome-screensaver-command is written by William Jon McCann <mccann@jhu.edu>.

       This manual page was written by Sven Arvidsson <sa@whiz.se>.

SEE ALSO

       gnome-screensaver(1)

GNOME
								    2007-09-27					      gnome-screensaver-command(1)
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