# renderstatus.sh
# Davis D. Remmel
# 
# Last modified: Fri, Nov. 9, 2012
# 
# DESCRIPTION #
# This script determines if LuxRender nodes are available based on a list of known nodes contained in a text file.
# 
# 
# USAGE #
# Make a text file called "rendernodes.list" using the following format:
# 
#     hostname1
#     hostname2
#     hostnameX
# 
# Then, run the script and wait for an output which can be copied and pasted into Blender's LuxRender network
# panel.
# 
# 
# RESTRICTIONS #
# Due to differences in native program flags, this script is meant to be run on a BSD-similar system (tested with
# OS X 10.6.8).
# 
# 

#!/bin/sh

FILE="rendernodes.list" # File containing list of known render nodes

exec < $FILE

# Parse the file line-by-line and ping the node. If no response, move on to next node.
LINECOUNT=0
while read line
do
    LINECOUNT=`expr $LINECOUNT + 1`;
    
    # Do something
    ping -o -t 3 "$line" > /dev/null 2>&1 # The ending redirects the output away from console
    
    if [ $? -eq 0 ] # Ping returns 0 if node is found
    then
        echo -n "$line:18018, " # Echo in format that can be copy and pasted into Blender LuxRender panel
    fi
    
    
done
echo # Newline