#!/bin/sh
#
#
#     File: radicron
#   Author: Dael Maselli - LNF - INFN
#     Date: 31 August 2007
#  Purpose: Randomly distributes crontab accross nodes (ex. cluster)
#
# Requires: GNU sed, md5sum, host, find, printf, cat in PATH.
#
#    Usage: Edit SPOOLDIR variable and insert an "as sync as possible"
#           directory shared accross radicron nodes.
#           Insert `radicron <command-to-run>` into your crontab.
#
#  Changed: 04 July 2008
#           creates directory structure
#

cd /tmp/

SPOOLDIR=/HIDDEN_FOR_INFN_SECURITY

DELAY=5

#############################################################################

COMMAND=$*

cridnd=`echo $COMMAND | md5sum | sed 's@  -@@'`
crid=$cridnd/`date +%G%m%d/%H/%M`

mkdir -p $SPOOLDIR/$crid

[ -f $SPOOLDIR/$crid/won ] && exit;

bet=`md5sum /proc/net/dev | sed -r 's@[^0-9]@@g' | sed -r 's@^(.....).*$@\1@'``printf %012d \`host $HOSTNAME | sed -r 's@^.+has address |\\.@@g'\``

echo $bet > $SPOOLDIR/$crid/bet.$HOSTNAME

sleep $DELAY

[ -f $SPOOLDIR/$crid/won ] && exit;

for vsbet in `find $SPOOLDIR/$crid -name "bet.*"`; do
    [ `cat $vsbet` -gt $bet ] && exit;
done

echo "NODE:$HOSTNAME"  > $SPOOLDIR/$crid/won
echo "CMDL:$COMMAND"  >> $SPOOLDIR/$crid/won

$COMMAND
exs=$?

/usr/sbin/tmpwatch --mtime 240 $SPOOLDIR/$cridnd
rmdir --ignore-fail-on-non-empty $SPOOLDIR/$cridnd

echo "EXIT:$exs" >> $SPOOLDIR/$crid/won

exit $exs