# linuxListEpochs.pl
#
# by Dean Giles 
# Version 1.0 
# November, 20 2006
#
# This Perl script lists all epochs, both active and innactive (used) of the Event Flie List (EFL) type. 
#   
# This script has been designed to be run on Linux. 
# The API set can be downloaded from  http://developer.novell.com/wiki/index.php/Virtual_File_Services_for_NetWare. 
# 
# This Utility list all EFL epochs (both active and used) on a specified volume.
#
# The Perl script requires the name of an NSS volume as input.  It requires that NSS be installed and an NSS volume be present.
#

{
	# User help function
	if (@ARGV < 1 || $ARGV[0] eq "/?" || $ARGV[0] eq "-?") 
	{
		print "USAGE: perl linuxListEpochs.pl VOLUME_NAME \n";
		print "Example: perl linuxListEpochs.pl VOL1 \n";
		exit;
	}


	# Global Variables
	$volume = $ARGV[0];
	$file = "+</_admin/Manage_NSS/Volume/$volume/FileEvents.xml"; # This is the MSS management file we are accessing
	$reply;	   # Variable used to read from file.
	$command; # This is the NSS xml command that will be the NSS request to the file.
	$error;	  # This variable manages error codes and messages.
	
	# Open the file and check that it exists.
	open(NSSFILE, $file) 
  		or die "Error opening NSS management file ($!) on server";
	print "file is now open";
	
	$command = "<nssRequest><fileEventList><listEpochs/></fileEventList></nssRequest>"; 
	# Initializing the virtual file for sending a command.
	print "$file \n";
	print "$command \n"; 
		

	#Open the file and check that it exists.
	if (!syswrite(NSSFILE, $command, length($command))) #Initialize the nss management file and write a command.
		{
		
		seek NSSFILE, 0, 0;	  # Make sure to start at the beginning of the file.
		sysread (NSSFILE, $error, 10000);  #Read the error message.
		
		print "Error writing initialization to management file. \n";
		print "$error  \n\n";	 #Print the error message to the screen.
		close (NSSFILE);
		}
	else
		{
		seek NSSFILE, 0, 0;	  # Make sure to start at the beginning of the file.
	
		sysread (NSSFILE, $reply, 10000);  #Read the reply.
	
		print "$reply  \n\n";	 #Print the reply to the screen.
		
		close (NSSFILE);
  		}
}