#!/usr/bin/perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html

package xCAT::Usage;
use Getopt::Long;
use xCAT::Utils;

#-------------------------------------------------------------------------------
=head1  xCAT::Usage
=head2    Package Description
  xCAT usage module. Some commands such as rpower have different implementations 
  for different hardware. This module holds the usage string for these kind
  of commands so that the usage can be referenced from different modules.
=cut
#-------------------------------------------------------------------------------


my %usage = (
    "rnetboot" => 
"Usage: rnetboot <noderange> [-s net|hd] [-F] [-f] [-V|--verbose] [-m table.colum==expectedstatus] [-m table.colum==expectedstatus...] [-r <retrycount>] [-t <timeout>]
       rnetboot <noderange> [ipl= address]
       rnetboot [-h|--help|-v|--version]",
    "rpower" => 
"Usage: rpower <noderange> [--nodeps] [on|onstandby|off|suspend|reset|stat|state|boot] [-V|--verbose] [-m table.colum==expectedstatus][-m table.colum==expectedstatus...] [-r <retrycount>] [-t <timeout>]
       rpower [-h|--help|-v|--version]
     KVM Virtualization specific:
       rpower <noderange> [boot] [ -c <path to iso> ]
     PPC (with IVM or HMC) specific:
       rpower <noderange> [--nodeps] [of] [-V|--verbose]
     PPC (HMC) specific:
       rpower <noderange> [onstandby] [-V|--verbose]
     CEC(using Direct FSP Management) specific:
       rpower <noderange> [on|onstandby|off|stat|state|lowpower|resetsp]
     Frame(using Direct FSP Management) specific:
       rpower <noderange> [stat|state|rackstandby|exit_rackstandby|resetsp]
     LPAR(using Direct FSP Management) specific:
       rpower <noderange> [on|off|reset|stat|state|boot|of|sms]
     Blade(using Direct FSP Management) specific:
       rpower <noderange> [on|onstandby|off|cycle|state|sms]
     Blade(using AMM) specific:
       rpower <noderange> [cycle|softoff] [-V|--verbose]
     zVM specific:
       rpower noderange [on|off|reset|stat|softoff]
     MIC specific:
       rpower noderange [stat|state|on|off|reset|boot]
",
    "rbeacon" => 
"Usage: rbeacon <noderange> [on|off|stat] [-V|--verbose]
       rbeacon [-h|--help|-v|--version]",
    "rvitals" => 
"Usage:
  Common:
      rvitals [-h|--help|-v|--version]
  FSP/LPAR (with HMC) specific:
      rvitals noderange {temp|voltage|lcds|all}
  CEC/LPAR/Frame (using Direct FSP Management)specific:
      rvitals noderange {rackenv|lcds|all}
  MPA specific:
      rvitals noderange {temp|voltage|wattage|fanspeed|power|leds|summary|all}
  Blade specific:
      rvitals noderange {temp|wattage|fanspeed|leds|summary|all}
  BMC specific:
      rvitals noderange {temp|voltage|wattage|fanspeed|power|leds|lcds|summary|all}
  MIC specific:
      rvitals noderange {thermal|all}",
    "reventlog" => 
"Usage: reventlog <noderange> [all [-s]|clear|<number of entries to retrieve> [-s]] [-V|--verbose]
       reventlog [-h|--help|-v|--version]",
    "rinv" => 
"Usage: 
    Common:
       rinv <noderange> [all|model|serial] [-V|--verbose]
       rinv [-h|--help|-v|--version]
    BMC specific:
       rinv <noderange> [mprom|deviceid|uuid|guid|vpd [-t]|all [-t]]
    MPA specific:
       rinv <noderange> [firm|bios|diag|mprom|sprom|mparom|mac|mtm [-t]] 
    PPC specific(with HMC):
       rinv <noderange> [all|bus|config|serial|model|firm [-t]]
    PPC specific(using Direct FSP Management):
       rinv <noderange> [firm]
       rinv <noderange> [deconfig [-x]]
    Blade specific:
       rinv <noderange> [all|serial|mac|bios|diag|mprom|mparom|firm|mtm [-t]]
    IBM Flex System Compute Node specific:
       rinv <noderange> [firm]
    VMware specific:
       rinv <noderange>
    zVM specific:
       rinv noderange [all|config]
    MIC specific:
       rinv noderange [system|ver|board|core|gddr|all]",
    "rsetboot" => 
"Usage: rsetboot <noderange> [net|hd|cd|floppy|def|stat] [-V|--verbose]
       rsetboot [-h|--help|-v|--version]",
    "rbootseq" => 
"Usage: 
       Common:
           rbootseq [-h|--help|-v|--version|-V|--verbose]
       Blade specific:
           rbootseq <noderange> [hd0|hd1|hd2|hd3|net|iscsi|usbflash|floppy|none],...
       PPC (using Direct FSP Management) specific:
           rbootseq <noderange> [hfi|net]",
    "rscan" => 
"Usage: rscan <noderange> [-u][-w][-x|-z] [-V|--verbose]
       rscan [-h|--help|-v|--version]",
    "rspconfig" => 
"Usage: 
   Common:
       rspconfig [-h|--help|-v|--version|-V|--verbose]
   BMC/MPA Common:
       rspconfig <noderange> [snmpdest|alert|community] [-V|--verbose]
       rspconfig <noderange> [snmpdest=<dest ip address>|alert=<on|off|en|dis|enable|disable>|community=<string>]
   BMC specific:
       rspconfig <noderange> [ip|netmask|gateway|backupgateway|garp]
       rspconfig <noderange> [garp=<number of 1/2 second>]
   iDataplex specific:
       rspconfig <noderange> [thermprofile]
       rspconfig <noderange> [thermprofile=<two digit number from chassis>]
   MPA specific:
       rspconfig <noderange>  [sshcfg|snmpcfg|pd1|pd2|network|swnet|ntp|textid|frame]
       rspconfig <singlenode> [textid=name]
       rspconfig <singlenode> [frame=number]
       rspconfig <singlenode> [USERID=passwd] [updateBMC=<y|n>]
       rspconfig <noderange>  [sshcfg=<enable|disable>|
           snmpcfg=<enable|disable>|                             
           pd1=<nonred|redwoperf|redwperf>|
           pd2=<nonred|redwoperf|redwperf>|
           network=<*|[ip],[host],[gateway],[netmask]>|
           swnet=<[ip],[gateway],[netmask]>|
           textid=<*>|
           frame=<*>|
           ntp=<[ntp],[ip],[frequency],[v3]>
   FSP/BPA Common:
       rspconfig <noderange> [autopower|iocap|decfg|memdecfg|procdecfg|time|date|spdump|sysdump|network|hostname]
       rspconfig <noderange> autopower=<enable|disable>|
           iocap=<enable|disable>|
           decfg=<enable|disable>:<policy name>,...|
           memdecfg=<configure|deconfigure>:<processing unit>:<bank|unit>:<bank/unit number>:id,...|
           procdecfg=<configure|deconfigure>:<processing unit>:id,...|
           date=<mm-dd-yyyy>|
           time=<hh:mm:ss>|
           network=<*|[ip],[host],[gateway],[netmask]>|
           HMC_passwd=<currentpasswd,newpasswd>|
           admin_passwd=<currentpasswd,newpasswd>|
           general_passwd=<currentpasswd,newpasswd>|
           *_passwd=<currentpasswd,newpasswd>|
           hostname=<*|hostname>
   FSP/CEC (using Direct FSP Management) Specific:
       rspconfig <noderange> HMC_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> admin_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> general_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> *_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> [sysname]
       rspconfig <noderange> [sysname=<*|name>]
       rspconfig <noderange> [pending_power_on_side]
       rspconfig <noderange> [pending_power_on_side=<temp|perm>]
       rspconfig <noderange> [cec_off_policy]
       rspconfig <noderange> [cec_off_policy=<poweroff|stayon>]
       rspconfig <noderange> [huge_page]
       rspconfig <noderange> [huge_page=<NUM>]
       rspconfig <noderange> [BSR]
       rspconfig <noderange> [setup_failover]
       rspconfig <noderange> [setup_failover=<enable|disable>]
       rspconfig <noderange> [force_failover]
       rspconfig <noderange> --resetnet
   BPA/Frame (using Direct FSP Management)specific:
       rspconfig <noderange> HMC_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> admin_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> general_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> *_passwd=<currentpasswd,newpasswd>
       rspconfig <noderange> [frame]
       rspconfig <noderange> frame=<*|frame>
       rspconfig <noderange> [sysname]
       rspconfig <noderange> [sysname=<*|name>]
       rspconfig <noderange> [pending_power_on_side]
       rspconfig <noderange> [pending_power_on_side=<temp|perm>]
       rspconfig <noderange> --resetnet
   HMC specific:
       rspconfig <noderange>  [sshcfg]
       rspconfig <noderange>  [sshcfg=<enable|disable>]
   CEC|Frame(using ASM)Specific:
       rspconfig <noderange>  [dev|celogin1]
       rspconfig <noderange>  [dev=<enable|disable>]|
       rspconfig <noderange>  [celogin1=<enable|disable>]
    ",
    "getmacs" => 
"Usage: 
   Common:
       getmacs [-h|--help|-v|--version]
   PPC specific:
       getmacs <noderange> [-F filter] 
       getmacs <noderange> [-M]
       getmacs <noderange> [-V| --verbose] [-f] [-d] [--arp] | [-D [-o] [-S server] [-G gateway] [-C client]]
   blade specific:
       getmacs <noderange> [-V| --verbose] [-d] [--arp] [-i ethN|enN]
",
    "mkvm" => 
"Usage:
    Common:
       mkvm [-h|--help|-v|--version]
    For PPC(with HMC):
       mkvm noderange -i id -l singlenode [-V|--verbose]
       mkvm noderange -c destcec -p profile [-V|--verbose]
       mkvm noderange --full [-V|--verbose]
    For KVM
       mkvm noderange -m|--master mastername -s|--size disksize -f|--force
    For zVM
       mkvm noderange directory_entry_file_path
       mkvm noderange source_virtual_machine pool=disk_pool pw=multi_password",
    "lsvm" => 
"Usage:
   Common:
       lsvm <noderange> [-V|--verbose]
       lsvm [-h|--help|-v|--version]
   PPC (with HMC) specific:
       lsvm <noderange> [-a|--all]
   PPC (using Direct FSP Management) specific:
       lsvm <noderange> [-l|--long]
   zVM specific:
       lsvm noderange
       lsvm noderange --getnetworknames
       lsvm noderange --getnetwork network_name
       lsvm noderange --diskpoolnames
       lsvm noderange --diskpool pool_name",
    "chvm" => 
"Usage:
   Common:
       chvm [-h|--help|-v|--version]
   PPC (with HMC) specific:
       chvm <noderange> [-p profile][-V|--verbose] 
       chvm <noderange> <attr>=<val> [<attr>=<val>...]
   PPC (using Direct FSP Management) specific:
       chvm <noderange> [-p <profile>]
       chvm <noderange> [lparname=<*|name>]
       chvm <noderange> -i <id> [-m <memory_interleaving>] -r <partition_rule>
   VMware specific:
       chvm <noderange> [-a size][-d disk][-p disk][--resize disk=size][--cpus count][--mem memory]
   zVM specific:
       chvm noderange [--add3390 disk_pool device_address cylinders mode read_password write_password multi_password]
       chvm noderange [--add3390active device_address mode]
       chvm noderange [--add9336 disk_pool virtual_device block_size mode blocks read_password write_password multi_password]
       chvm noderange [--adddisk2pool function region volume group]
       chvm noderange [--addnic address type device_count]
       chvm noderange [--addprocessor address]
       chvm noderange [--addprocessoractive address type]
       chvm noderange [--addvdisk userID] device_address size]
       chvm noderange [--connectnic2guestlan address lan owner]
       chvm noderange [--connectnic2vswitch address vswitch]
       chvm noderange [--copydisk target_address source_node source_address]
       chvm noderange [--dedicatedevice virtual_device real_device mode]
       chvm noderange [--deleteipl]
       chvm noderange [--formatdisk disk_address multi_password]
       chvm noderange [--disconnectnic address]
       chvm noderange [--grantvswitch VSwitch]
       chvm noderange [--removedisk virtual_device]
       chvm noderange [--resetsmapi]
       chvm noderange [--removediskfrompool function region group]
       chvm noderange [--removenic address]
       chvm noderange [--removeprocessor address]
       chvm noderange [--replacevs directory_entry]
       chvm noderange [--setipl ipl_target load_parms parms]
       chvm noderange [--setpassword password]",
    "rmvm" => 
"Usage: rmvm <noderange> [--service][-V|--verbose] 
       rmvm [-h|--help|-v|--version],
       rmvm [-p] [-f]",
    "lsslp" =>
"Usage: lsslp [-h|--help|-v|--version]
       lsslp [<noderange>][-V|--verbose][-i ip[,ip..]][-w][-r|-x|-z][-n][-I][-s FRAME|CEC|MM|IVM|RSA|HMC|CMM|IMM2|FSP]
             [-t tries][--vpdtable][-C counts][-T timeout]",
  "rflash" =>
"Usage: 
    rflash [ -h|--help|-v|--version]
    PPC (with HMC) specific:
	rflash <noderange> -p <rpm_directory> [--activate concurrent | disruptive][-V|--verbose] 
	rflash <noderange> [--commit | --recover] [-V|--verbose]
    PPC (using Direct FSP Management) specific:
	rflash <noderange> -p <rpm_directory> --activate <disruptive|deferred> [-d <data_directory>]
	rflash <noderange> [--commit | --recover] [-V|--verbose]
        rflash <noderange> [--bpa_acdl]",
    "mkhwconn" =>
"Usage:
    mkhwconn [-h|--help]
    
    PPC (with HMC) specific:
    mkhwconn noderange -t [--bind] [-V|--verbose]
    mkhwconn noderange -p single_hmc [-P HMC passwd] [-V|--verbose]
    
    PPC (using Direct FSP Management) specific:
    mkhwconn noderange -t [-T tooltype] [--port port_value]
    mkhwconn noderange -s [hmcnode] [-P HMC passwd] [-V|--verbose]",
    "rmhwconn" =>
"Usage:
    rmhwconn [-h|--help]
    
    PPC (with HMC) specific:
    rmhwconn noderange [-V|--verbose]
    
    PPC (using Direct FSP Management) specific:
    rmhwconn noderange [-T tooltype]
    rmhwconn noderange -s",
    "lshwconn" =>
"Usage:
    lshwconn [-h|--help]
    
    PPC (with HMC) specific:
    lshwconn noderange [-V|--verbose]
    
    PPC (using Direct FSP Management) specific:
    lshwconn noderange [-T tooltype]
    lshwconn noderange -s",
    "renergy" =>
"Usage:
    renergy [-h | --help] 
    renergy [-v | --version] 

    Power 6 server specific :
    renergy noderange [-V] { all | { [savingstatus] [cappingstatus] [cappingmaxmin] [cappingvalue] [cappingsoftmin] [averageAC] [averageDC] [ambienttemp] [exhausttemp] [CPUspeed] } }
    renergy noderange [-V] { {savingstatus}={on | off} | {cappingstatus}={on | off} | {cappingwatt}=watt | {cappingperc}=percentage } 

    Power 7 server specific :
    renergy noderange [-V] { all | { [savingstatus] [dsavingstatus] [cappingstatus] [cappingmaxmin] [cappingvalue] [cappingsoftmin] [averageAC] [averageDC] [ambienttemp] [exhausttemp] [CPUspeed] [syssbpower] [sysIPLtime] [fsavingstatus] [ffoMin] [ffoVmin] [ffoTurbo] [ffoNorm] [ffovalue] } }
    renergy noderange [-V] { {savingstatus}={on | off} | {dsavingstatus}={on-norm | on-maxp | off} | {fsavingstatus}={on | off} | {ffovalue}=MHZ | {cappingstatus}={on | off} | {cappingwatt}=watt | {cappingperc}=percentage }

    BladeCenter specific :
      For Management Modules:
        renergy noderange [-V] { all | pd1all | pd2all | [pd1status] [pd2status] [pd1policy] [pd2policy] [pd1powermodule1] [pd1powermodule2] [pd2powermodule1] [pd2powermodule2] [pd1avaiablepower] [pd2avaiablepower] [pd1reservedpower] [pd2reservedpower] [pd1remainpower] [pd2remainpower] [pd1inusedpower] [pd2inusedpower] [availableDC] [averageAC] [thermaloutput] [ambienttemp] [mmtemp] }
      For a blade server nodes:
        renergy noderange [-V] { all | [averageDC] [capability] [cappingvalue] [CPUspeed] [maxCPUspeed] [savingstatus] [dsavingstatus] }
        renergy noderange [-V] { savingstatus={on | off} | dsavingstatus={on-norm | on-maxp | off} }
 
    Flex specific :
      For Flex Management Modules:
        renergy noderange [-V] { all | [powerstatus] [powerpolicy] [powermodule] [avaiablepower] [reservedpower] [remainpower] [inusedpower] [availableDC] [averageAC] [thermaloutput] [ambienttemp] [mmtemp] }
 
      For Flex node (power and x86):
        renergy noderange [-V] { all | [averageDC] [capability] [cappingvalue] [cappingmaxmin] [cappingmax] [cappingmin] [cappingGmin] [CPUspeed] [maxCPUspeed] [savingstatus] [dsavingstatus] }
        renergy noderange [-V] { cappingstatus={on | off} | cappingwatt=watt | cappingperc=percentage | savingstatus={on | off} | dsavingstatus={on-norm | on-maxp | off} }
 
    iDataPlex specific :
      renergy noderange [-V] [ { cappingmaxmin | cappingmax | cappingmin } ] [cappingstatus] [cappingvalue] [relhistogram]
      renergy noderange [-V] { cappingstatus={on | enable | off | disable} | {cappingwatt|cappingvalue}=watt }",
  "updatenode" =>
"Usage:
    updatenode [-h|--help|-v|--version | -g|--genmypost]
    or
    updatenode <noderange> [-V|--verbose] [-k|--security] [-s|--sn]
    or
    updatenode <noderange> [-V|--verbose] [-F|--sync | -f|--snsync] [-l|--user[username]] [--fanout=[fanout value]] [-S|--sw] 
        [-P|--scripts [script1,script2,...]] [-s|--sn] 
        [-A|--updateallsw] [-c|--cmdlineonly] [-d alt_source_dir]
        [attr=val [attr=val...]]
    or
    updatenode <noderange> [-V|--verbose] [script1,script2,...]

Options:
    <noderange> A list of nodes or groups.

    [-k|--security] Update the security keys and certificates for the 
        target nodes.

    [-F|--sync] Perform File Syncing.

    [--fanout]  Allows you to assign the fanout value for the command. 
        See xdsh/xdcp fanout parameter in the man page.

    [-f|--snsync] Performs File Syncing to the service nodes that service 
        the nodes in the noderange.

    [-g|--genmypost] Will generate a new mypostscript file for the  
        the nodes in the noderange, if site precreatemypostscripts is 1 or YES.

    [-l|--user] User name to run the updatenode command.  It overrides the
        current user which is the default.

    [-S|--sw] Perform Software Maintenance.

    [-P|--scripts] Execute postscripts listed in the postscripts table or 
        parameters.

    [-c|--cmdlineonly] Only use AIX software maintenance information 
        provided on the command line. (AIX only)

    [-s|--sn] Set the server information stored on the nodes.

    [-A|--updateallsw] Install or update all software contained in the source 
        directory. (AIX only)

    [-d <alt_source_dir>] Used to indicate a source directory other than
        the standard lpp_source directory specified in the xCAT osimage 
        definition.  (AIX only)

    [script1,script2,...] A comma separated list of postscript names. 
        If omitted, all the post scripts defined for the nodes will be run.

    [attr=val [attr=val...]]  Specifies one or more 'attribute equals value' 
        pairs, separated by spaces. (AIX only)",
  "lsflexnode" =>
"Usage:
    lsflexnode [-h|--help|-v|--version]
    lsflexnode <noderange>",
  "mkflexnode" =>
"Usage:
    mkflexnode [-h|--help|-v|--version]
    mkflexnode <noderange>",
  "nodeset" =>
"Usage:
   Common:
      nodeset [-h|--help|-v|--version]
      nodeset <noderange> [install|shell|boot|runcmd=bmcsetup|netboot|iscsiboot|osimage[=<imagename>]|statelite|offline]",
  "rmflexnode" =>
"Usage:
    rmflexnode [-h|--help|-v|--version]
    rmflexnode <noderange>",
  "lsve" =>
"Usage:
    lsve [-t type] [-m manager] [-o object]
      -t: dc - 'Data Center', cl - 'Cluster', sd - 'Storage Domain', nw - 'Network', tpl -'Template'
      -m: FQDN (Fully Qualified Domain Name) of the rhev manager
      -o: Target object to display",
 "cfgve" =>
"Usage:
    cfgve -t dc -m manager -o object [-c -k nfs|localfs | -r]
    cfgve -t cl -m manager -o object [-c -p cpu type | -r -f]
    cfgve -t sd -m manager -o object [-c | -g | -s | -a | -b | -r -f]
      -t: sd - 'Storage Domain', nw - 'Network', tpl -'Template'
      -m: FQDN (Fully Qualified Domain Name) of the rhev manager
      -o: Target object to configure
    cfgve -t nw -m manager -o object [-c -d data center -n vlan ID | -a -l cluster| -b | -r]
    cfgve -t tpl -m manager -o object [-r]",
 "chhypervisor" =>
"Usage:
    chhypervisor noderange [-a | -n | -p | -e | -d | -h]",
 "rmhypervisor" =>
"Usage:
    rmhypervisor noderange [-f | -h]",
 "clonevm" =>
"Usage:
    clonevm noderange [-t createmaster -f | -b basemaster -d | -h]",
);
my $vers = xCAT::Utils->Version();
my %version = (
    "rnetboot" => "$vers",
    "rpower" => "$vers",
    "rbeacon" => "$vers",
    "rvitals" => "$vers",
    "reventlog" => "$vers",
    "rinv" => "$vers",
    "rsetboot" => "$vers",
    "rbootseq" => "$vers",
    "rscan" => "$vers",
    "rspconfig" => "$vers",
    "getmacs" => "$vers",
    "mkvm" => "$vers",
    "lsvm" => "$vers",
    "chvm" => "$vers",
    "rmvm" => "$vers",
    "lsslp" => "$vers",
    "rflash" => "$vers",
    "renergy" => "$vers",
    "lsflexnode" => "$vers",
    "mkflexnode" => "$vers",
    "rmflexnode" => "$vers",
    "nodeset" => "$vers",
    "lsve" => "$vers",
    "cfgve" => "$vers",
    "chhypervisor" => "$vers",
    "rmhypervisor" => "$vers",
    "clonevm" => "$vers",
);

#--------------------------------------------------------------------------------
=head3   getUsage
      It returns the usage string for the given command.
    Arguments:
        command
    Returns:
        the usage string for the command.
=cut
#-------------------------------------------------------------------------------
sub getUsage {
  my ($class, $command)=@_;
  if (exists($usage{$command})) { return $usage{$command};}  
  else { return "Usage for command $command cannot be found\n"; }
}

#--------------------------------------------------------------------------------
=head3   getVersion
      It returns the version string for the given command.
    Arguments:
        command
    Returns:
        the version string for the command.
=cut
#-------------------------------------------------------------------------------
sub getVersion {
  my ($class, $command)=@_;
  if (exists($version{$command})) { return $version{$command};}  
  else { return "Version string for command $command cannot be found\n"; }
}

#--------------------------------------------------------------------------------
=head3   parseCommand
      This function parses the given command to see if the usage or version string
      need to be returned. 
    Arguments:
        command
        arguments
    Returns:
        the usage or the version string for the command. The caller need to display the
           string and then exit.
        none, if no usage or version strings are needed. The caller can keep going.
=cut
#-------------------------------------------------------------------------------
sub parseCommand {
  my $command=shift;
  if ($command =~ /xCAT::Usage/) { $command=shift; }
  my @exargs=@_;
  
  @ARGV=@exargs;

  #print "command=$command, args=@exargs, ARGV=@ARGV\n";

  Getopt::Long::Configure('pass_through','no_ignore_case');

  # parse the options
  if(!GetOptions(
      'h|help'     => \$::HELP,
      'v|version'  => \$::VERSION)) {
    
    return "";
  }

  if ($::HELP) { return xCAT::Usage->getUsage($command); }
  if ($::VERSION) { return xCAT::Usage->getVersion($command); }

  return "";
}