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FLEXlm End User Manual: Chapter 6 License Administration Tools

Chapter 6  License Administration Tools

FLEXlm provides utilities for the license administrator to help manage the licensing  activities on the network. These utilities are:

• lmcksum (v2.4 or later) - prints license checksums. (page 40)
• lmdiag (v4.0 or later) - diagnoses license checkout problems. (page 40)
• lmdown - gracefully shuts down all license daemons (both  lmgrd and all vendor  daemons) on the license server node (or on all three nodes in the case of  redundant servers). (page 41)
• lmgrd - the main daemon program for  FLEXlm. (page 41)
• lmhostid - reports the hostid of a system. (page 42)
• lmremove - removes a single user's license for a specified feature. (page 43)
• lmreread - causes the license daemon to reread the license file and start any new  vendor daemons. (page 44)
• lmstat - helps you monitor the status of all network licensing activities. (page 44)
• lmswitch (VMS only) -switches the debug logfile. (page 44)
• lmswitchr - switches the report log file. (page 45)
• lmver - reports the  FLEXlm version of a library or binary file. (page 45)

Beginning in  FLEXlm v2.4, all  FLEXlm utility programs (except  lmgrd) are packaged  as a single executable called  lmutil. lmutil can either be installed as the individual  commands (either by creating links to the individual command names, or making  copies of lmutil as the individual command names), or the commands can be run as  `lmutil command', e.g. `lmutil lmstat', or `lmutil lmdown'. On Windows or  Windows/NT systems, the `lmutil command_name' form of the commands are  available. There is also a Windows version of these commands - see  Section 6.12.1,  `License Administration Tools - LMTOOLS for Windows,' on page 46.

Most  lmutil utilities need to know the path to the license file. This can be specified with  a `-c  license_file' argument, or by setting the LM_LICENSE_FILE environment  variable. Otherwise, the default location is used.

6.1  lmcksum

The  lmcksum program (FLEXlm v2.4 or later) will perform a checksum of a license  file. This is useful to verify data entry errors at your location.  lmcksum will print a line-by-line checksum for the file as well as an overall file checksum.  lmcksum takes the  `-k' switch to force the encryption key checksum to be case-sensitive.

lmcksum will ignore all fields that do not enter into the encryption key computation;  thus the server node name and port number, as well as the daemon pathname and  options file names are not checksummed. In addition,  lmcksum will treat non-case  sensitive fields correctly (in general,  lmcksum is not case-sensitive).

lmcksum takes an optional daemon name; if specified, only license file lines for the  selected daemon are used to compute the checksums.

For FEATURE lines that contain ck=nnn, lmcksum prints simply OK or BAD. This is  available for  FLEXlm products v4 or higher.

Usage is:

lmcksum [-c license_file]

-c  license_file

path to the file to checksum. By default lmcksum uses  `license.dat' in the current directory (unlike other  lmutil commands).

Example output is:

lmcksum - Copyright (C) 1989, 1997 GLOBEtrotter Software, Inc.
lmcksum: using license file `/usr/local/flexlm/licenses/license.dat'

	189: SERVER speedy 08002b32b161 2837
	166: DAEMON demo C:\flexlm\demo.exe
	  8: FEATURE f1 demo 1.000 01-jan-99 0 3B2BC33CE4E1B8F3A0BF ``
OK:  	231: FEATURE f2demo 1.0 01-jan-0 1 8B1C30015351B7737F5E \
		DUP_GROUP=HD ck=231
	109: (overall file checksum)

6.2  lmdiag

lmdiag (FLEXlm v4.0 or later) allows you to diagnose problems when you cannot  check out a license.

Usage is:

lmdiag [-c license_file] [-n] [feature]

-c  license_file

path to the file to diagnose.

-n 

run in non-interactive mode;  lmdiag will not prompt for  any input in this mode. In this mode, extended connection  diagnostics are not available. 

feature

diagnose this feature only. 

If no  feature is specified,  lmdiag will operate on all features in the license file(s)  in your path.  lmdiag will first print information about the license, then attempt to  check out each license. If the checkout succeeds,  lmdiag will indicate this. If the  checkout fails,  lmdiag will give you the reason for the failure. If the checkout fails  because  lmdiag cannot connect to the license server, then you have the option of  running `extended connection diagnostics'.

These extended diagnostics attempt to connect to each port on the license server node,  and can detect if the port number in the license file is incorrect.  lmdiag will indicate  each port number that is listening, and if it is an  lmgrd process,  lmdiag will indicate  this as well. If  lmdiag finds the vendor daemon for the feature being tested, then it  will indicate the correct port number for the license file to correct the problem.

See Also:  Appendix B, `FLEXLM_DIAGNOSTICS' on page 54.

6.3  lmdown

The  lmdown utility allows for the graceful shutdown of all license daemons (both  lmgrd and all vendor daemons) on all nodes.

Usage is:

lmdown [-c license_file] [-q]

-c  license_file

Use the specified license file.

-q

Don't prompt or print a header. Otherwise  lmdown asks  `Are you sure? [y/n]: `.

You should protect the execution oflmdown, since shutting down the servers causes  users to lose their licenses. See the `-p' or the `-x' options in  Section 6.4, `lmgrd,'  on page 41 for details about securing access to  lmdown.

When shutting down redundant servers, there is a 1 minute delay before the servers  shut down. Do  not use `kill -9' to shut down the license servers.

6.4  lmgrd

lmgrd is the main daemon program for  FLEXlm. When you invoke  lmgrd, it looks  for the license file which contains the information about vendors and features. On Unix  systems, it is strongly recommended that lmgrd be run as a non-privileged user (not  root).

Usage is:

lmgrd [ -app ] [ -c license_file ] [ -t timeout_interval ] [ -l logfile ]
[ -s timestamp_interval ] [ -2 -p ] [ -v ] [ -x lmdown ] [ -x lmremove ]

-app

Required for Windows/NT systems.

-c  license_file

Use the license file named.

-t  timeout_interval

Sets a timeout interval, in seconds, during which redundant  daemons must complete their connections to each other.  The default value is 10 seconds. A larger value may be  desirable if the daemons are being run on busy systems or  a very heavily loaded network.

-l  logfile

Write the debug log to  logfile.

-s  timestamp_interval

Specifies the logfile timestamp interval, in minutes. The  default is 360 minutes.

-2 -p

Restricts usage of  lmdown,  lmreread, and  lmremove  to a  FLEXlm administrator who is by default root. If there  a  Unix group called `lmadmin' then use is restricted to  only members of that group. If root is not a member of this  group, then root does not have permission to use any of the  above utilities. The `-p' option is available in  FLEXlm v2.4 and later.

-v

Prints  lmgrd's version number and copyright and exits.

-x lmdown

Disallow the lmdown command (no user can run lmdown).  If lmdown is disabled, you will need to stop lmgrd via  `kill  pid' (Unix) or CTRL-ALT-DEL and stop the  lmgrd and vendor daemon processes (Windows 95). On  Unix, be sure the kill command does not have a -9  argument.

-x lmremove

Disallow the lmremove command (no user can run  lmremove)

The -x lmdown and -x lmremove options are available in  FLEXlm v4.0 and later.

6.5  lmhostid

The  lmhostid utility reports the hostid of a system.

Usage is:

lmhostid [-n]

The output of this command looks as follows:

lmhostid - Copyright (c) 1989, 1990 Globetrotter Software, Inc.
The FLEXlm hostid of this machine is `69021c89'

With the `-n' argument, no header is printed; only the hostid.

See  Appendix A, `Hostids for FLEXlm-Supported Machines'.

6.6  lmremove

The  lmremove utility allows you to remove a single user's license for a specified  feature. This is only needed when a client node crashes, since that's the only condition  where a license is not automatically freed. If the application is active, it will re-checkout the license after it is freed by lmremove.

Usage is:

lmremove [ -c file ] feature user host display

	or

lmremove [ -c file ] -h feature host port handle

-c  license_file

license file

feature

name of the feature checked out by the user.

user

name of the user whose license you are removing (from  lmstat -a).

host

name of the host the user is logged in to (from lmstat -a).

display

name of the display where the user is working (from lmstat  -a).

port

port, as reported by lmstat -a

handle

handle, as reported by lmstat -a

The  user host display port and handle  information must be obtained from the output  of  lmstat -a.

lmremove removes all instances of  user on  host on  display from usage of  feature. If the  optional `-c  file' is specified, the indicated file is used as the license file.You should  protect the execution of  lmremove,  since removing a user's license can be disruptive.  See the `-p' or the `-x' options in  Section 6.4, `lmgrd,' on page 41 for details about  securing access to  lmremove.

The  -h variation uses the serverhost, port, and license handle, as reported by  lmstat -a. Consider this example  lmstat  -a output:

joe cloud7 /dev/ttyp5 (v1.000) (cloud9/7654 102), start Fri 10/29 18:40

In this example, the serverhost is `cloud9', the port is `7654' and the license handle  is 102. To remove this license, issue the following command:

lmremove -h f1 cloud9 7654 102

or

lmremove f1 joe cloud7 /dev/ttyp5

When removing by handle, if licenses are grouped as duplicates, all duplicate licenses  will also be removed.

6.7  lmreread

Thelmreread utility causes the license daemon to reread the  license file and start  any new vendor daemons that have been added. In addition, all pre-existing daemons  will be signaled to reread the license file for changes in feature licensing information.

Usage is:

lmreread [-c license_file]

The license administrator may want to protect the execution of  lmreread,  since  removing a user's license can be disruptive. See the `-p' and `-x'  options in  Section 6.4, `lmgrd,' on page 41 for details about securing access to  lmreread.

If you use the `-c' option, the license file specified will be read by  lmreread, not  by  lmgrd;  lmgrd rereads the file it read originally. Also,  lmreread cannot be used to  change server node names or port numbers. Vendor daemons will not reread their  option files as a result of  lmreread.

6.8  lmstat

The  lmstat utility helps you monitor the status of all network licensing activities.

Usage is:

lmstat 	[-a] [ -A ] [-c license_file] [-f feature] [-i [feature]]
	[-S vendor] [-s hostname] [-t value]

-a

Display all information

-A

List all active licenses

-c  license_file

Use the license file named. 

-f  feature_name

List users of  feature_name.

-i [feature_name]

Print information about the named  feature, or all  features if no  feature_name is given. This option is usually  not recommended, since the information does not come  from the license server, and may not reflect what the server  actually supports.

-S [vendor]

List all users of  vendor's features.

-s  hostname

Display status of clients running on  hostname.

-t  value

Set  lmstat timeout to `value'.

6.9  lmswitch

The  lmswitch command is available on VMS only.

Thelmswitch utility switches the debug log file for the daemon serving the specified  feature while the daemon is running.

Usage is:

lmswitch feature new-file

feature

any feature this daemon supports.

new-file

the new file path.

Of course, for this syntax to work,  lmswitch needs to be installed as a foreign  command.

The new logfile will be opened for write, rather than append, so it is possible to  `switch' to the same filename in order to be able to view the old log file.

6.10  lmswitchr

Thelmswitchr utility switches the report writer (REPORTLOG) log file. It will also  start a new REPORTLOG file if one does not already exist.

Usage is:

lmswitchr [-c license_file] feature new-file

lmswitchr [-c license_file] vendor new-file [v5.0+ only]

-c

license file path

feature

any feature this daemon supports

new-file

new file path

lmswitchr does not work with  FLEXlm v3.0 vendor daemons. Ask your vendor for a  later version of their vendor daemon.

6.11  lmver

The  lmver utility reports the  FLEXlm version of a library or binary file.

Usage is:

lmver filename

filename

name of the executable of the product. 

For example if you have an application called `spell' type:

	% lmver spell

Alternatively, on Unix systems, you can use the following commands to get the  FLEXlm version of a binary:

	strings file | grep Copy

6.12  License Administration Tools for Windows

6.12.1 License Administration Tools - LMTOOLS for Windows

For the Windows Platforms, an  LMTOOLS.EXE Windows program is provided. It has  the same functionality as listed in the previous sections but is graphically-oriented.  Simply run the program and choose a button for the functionality required. Refer to the  previous sections for information about the options of each feature.

6.12.2 The  FLEXlmControl Panel

The  FLEXlm control panel, FLEXLM.CPL, is an applet that installs into the Control  Panel of Windows and is used to control the execution of the  FLEXlm license manager.  If the software you are installing includes the Control Panel, it will be installed in your  Windows System Directory.

The library LMGR325B.DLL needs to be available for FLEXLM.CPL. In this  example it is placed in the same directory, but it could be placed anywhere in the  system search path.

6.12.3 Controlling LMGRD with the Windows Control Panel

LMGRD.EXE can be run manually or using the Control Panel.  FLEXlm for Windows  comes with a Control Panel applet for controlling LMGRD.EXE without using the  DOS prompt.

6.12.4 Using The Control Panel on  NT

To start the  FLEXlm Control Panel, open the Control Panel and double-click on the  FLEXlm License Manager icon.

From the Control tab you can start, stop, and check the status of your license server.  Select the Setup tab to enter information about your license server.

The Service Name of `FLEXlm License Manager' is the default (for backwards  compatibility). You should change this to a name that your vendor recommends.  Complete the form to configure  lmgrd to serve licenses.

The information you enter is stored in the registry under the service name you created:

HKEY_LOCAL_MACHINE\SOFTWARE\FLEXlm License Manager\Service-Name\...

Select the  Control tab and click the  Start button to turn on your license server.  LMGRD.EXE will be launched as a background application with the license file and  debug log file locations passed as parameters.

If you want LMGRD.EXE to start automatically, select the `Use NT Services' box and  LMGRD.EXE will be installed as an NT service. You can then use the NT's Services  control panel to adjust the start/stop behavior of LMGRD.EXE. Since NT services do  not have command line parameters, LMGRD.EXE, when started as a service, locates  its service name under `FLEXlm License Manager' in the registry and from there  recovers the license file and log file locations. Multiple instances of LMGRD.EXE can  be run as services provided each occurrence has a different service name.

You can switch back and forth between different instances of LMGRD.EXE by using  the  Setup tab and changing the selection in `Service Name'. This is only necessary if  you have more than one product licensed with  FLEXlm.

The remaining tabs in the control panel allow you a subset of control similar to the  LMUTIL.EXE program. The Licenses tab provides information about the license file  and the Advanced tab allows you to perform diagnostics and check versions.

6.12.5 Using the Control Panel on  Windows 95

The behavior of the control panel applet FLEXLM.CPL is almost identical under  Windows 95 and NT. FLEXLM.CPL is located in the Windows\System directory. If  you are starting LMGRD.EXE manually from the  Control tab, there is no difference  between the two. But, since services are not available on Windows 95, the  Use NT  Service check box is not available.   Instead a  Start Server at Power-UP check box  gives you the option to start the server when the system is booted.

On Windows 95,  FLEXlm makes use of a registry feature that launches programs  automatically. The `Microsoft\Windows\CurrentVersion\RunServices' registry is  used to launch the program LMGRD95.EXE at power-on. This program scans the  `FLEXlm License Manager' area of the registry and launches an instance of  LMGRD.EXE for each service-name it finds.

If someone switches users (i.e. selects `shutdown' and chooses `close all programs  and log on as a different user') on Windows 95, all instances of LMGRD.EXE will  be terminated (see Microsoft documentation). This is one of the reasons we do not  recommend using Windows 95 as a license server

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