Using License Files

The following is an example of an IDL license file. This example is built for the license server "hal," which has the LMHostid "0000c09a23f0" and the designated port number "1700." This license has five floating licenses for UNIX machines. The last line in the license file is the FEATURESET line, which ties all the FEATURE and INCREMENT lines together:

SERVER hal 0000c09a23f0 1700  
USE_SERVER  
DAEMON idl_lmgrd  
INCREMENT idl idl_lmgrd x.x00 1-jan-0000 50 5BC6A081FA3009FA5673 \  
   VENDOR_STRING="1234-1Acme Datawack Corp" ck=16  
FEATURESET idl_lmgrd 96C31B1FB71BCAE9

The FEATURE or INCREMENT lines of the license file determine which products are available. The x.x refers to the IDL version. The SERVER lines define which machines the products run on. The number of copies of the product that can run concurrently is controlled by the number of license units available, as specified by either the FEATURE or INCREMENT lines.

The FEATURE or INCREMENT line for the floating license shows 50 license units. This is not an error. Each idl or idl_rt counted license requires 10 license units (6 for Windows, Linux, or Mac OS X) on the FEATURE or INCREMENT line. The number of license units is a platform-dependent scale factor times the number of licenses you own. For example, if you have 3 UNIX floating licenses, this field is set to 30.

Viewing License Files

To access the text of your license file through the license wizard, open the license wizard. See Using the License Wizard for details. You must be logged in as root or have write permissions on the licensing directory, to modify the license file.

Modifying License Files

On Windows, you normally should not include a path on the DAEMON line of your server-based license file. However, if your lmgrd.exe file and your vendor daemon file (idl_lmgrd.exe) are moved to separate directories, then you will need to edit the DAEMON line of your license file to reflect the actual location of your vendor daemon or vendor daemon directory. For example:

DAEMON idl_lmgrd "C:\Otherdir\idlxx\bin\bin.<platform>\idl_lmgrd.exe"

DAEMON idl_lmgrd /otherdir/itt/idlxx/bin

DAEMON idl_lmgrd /otherdir/itt/idlxx/bin

Changes to a modified license file will not take effect until the license manager is restarted using that license file.

License Sources

FLEXlm stores the latest successful IDL or ENVI license information on UNIX and Mac OS X in a FLEXlm resource file called .flexlmrc in the user's home directory. This file defines a variable named IDL_LMGRD_LICENSE_FILE to indicate the license source. For example, the definition in the file might read as follows:

IDL_LMGRD_LICENSE_FILE=/usr/local/itt/license/license.dat

IDL continues to use this information until the IDL_LMGRD_LICENSE_FILE value is redefined, the .flexlmrc file is removed, or a system environment variable called IDL_LMGRD_LICENSE_FILE is defined in the shell environment used to start IDL.

Note that even if a system environment variable named IDL_LMGRD_LICENSE_FILE is defined, the IDL_LMGRD_LICENSE_FILE setting in the .flexlmrc file will continue to be referenced, but as a secondary license source if the IDL_LMGRD_LICENSE_FILE system environment variable does not supply a viable license source for the IDL session.

A license source defined by IDL_LMGRD_LICENSE_FILE in your .flexlmrc file or as a system variable will always hold precedence over any LM_LICENSE_FILE environment variable's definition. Only if IDL cannot successfully access a license source defined by IDL_LMGRD_LICENSE_FILE will it attempt to access a license defined by LM_LICENSE_FILE. Here is the order of license source precedence:

To override the .flexlmrc license source definition, define an IDL_LMGRD_LICENSE_FILE system environment variable that points to the desired license file. For example, for a C shell:

setenv IDL_LMGRD_LICENSE_FILE /usr/local/itt/license/license.dat

export IDL_LMGRD_LICENSE_FILE=/usr/local/itt/license/license.dat

Customizing Floating Licenses

You can customize license management by creating a license manager options file. This file lets you:

Reserve licenses for specified users or groups of users

Allow or disallow the use of IDL by certain users

Control what events are recorded in the log file

To customize the license manager, create an options file in a text editor as described in the following section. See Sample Options Files: Reserving Licenses for a Group for examples.

Creating an Options File

Use a text editor to create an options file. For IDL and ENVI, the options file must be named idl_lmgrd.opt and must be saved in the same directory as license.dat. The default location in which to save the options file is the ITT_DIR/license directory.

Note
Whenever you modify the options file, you must stop and restart the license manager before the changes will take effect.

Use the following conventions when creating an options file:

Specify each option on a separate line.

Each line must begin with one of the keywords specified in the following table.

Limit the length of each line to fewer than 2048 characters. You can use the backslash (\) as a line continuation character if you need more than 2048 characters.

All elements of the options file are case sensitive so users and groups must be correctly and consistently identified.

Lines beginning with the pound sign (#) are ignored and can be used as comments.

Options File Keywords

The following table describes the keywords available for creating an options file:

Table 6-2: Options File Keywords

Table 6-2: Options File Keywords
Keyword	Example	Description
EXCLUDE	EXCLUDE feature type type_name EXCLUDE idl USER bob EXCLUDE envi USER bob Excludes user "bob" from using IDL or ENVI.	Can exclude user, group, host, or host_group from using IDL or ENVI. EXCLUDE takes precedence over INCLUDE statements.
EXCLUDEALL	EXCLUDEALL type type_name EXCLUDEALL GROUP misfit Prevents the group "misfit" from using any of the features served by this vendor daemon.	Implicitly allows members of all groups except "misfit" to access all features served by this vendor daemon.
GROUP	GROUP group user_list GROUP visitor sam kate Defines users "sam" and "kate" as comprising the group "visitor".	Defines a list of users to use as a group with other keywords such as INCLUDE or EXCLUDE.
HOST_GROUP	HOST_GROUP group host_list HOST_GROUP main hal sam Defines hosts "hal" and "sam" as the group "main".	Defines a list of hosts to use as a group with other keywords such as INCLUDE or EXCLUDE.
INCLUDE	INCLUDE feature type type_name INCLUDE idl GROUP visitor INCLUDE envi GROUP visitor Allows only users in the group "visitor" to use IDL or ENVI.	Includes only specifically identified users or groups. All others are implicitly outside of this group, and denied access.
INCLUDEALL	INCLUDEALL type type_name INLCUDEALL GROUP research Allows all users listed in the group "research" to use all features served by this vendor daemon.	Specifies users or groups allowed use of all features served by this vendor daemon.
LINGER	LINGER feature seconds LINGER idl 20 LINGER envi 20 The license manager holds on to a license for an additional 20 seconds after it is checked in.	Causes licenses to be held by the license manager for a specific amount of time after a user exits IDL or ENVI. Rarely used.
MAX	MAX #lic feature type type_name MAX 10 idl_rt GROUP research MAX 10 envi_rt GROUP research Allows users in the "research" group to use at most 10 units of the "idl_rt" or "envi_rt" feature at one time.	Limits usage of a feature among users or groups.
NOLOG	NOLOG event_type NOLOG DENIED NOLOG QUEUED	A separate NOLOG line is needed to turn off logging of events including IN, OUT, DENIED, and QUEUED.
REPORTLOG	REPORTLOG report_log _path REPORTLOG +itt\license Specifies the reportlog file path.	The "+" indicates to append the file instead of overwriting it each time the manager is started.
RESERVE	RESERVE #lic feature type type_name RESERVE 10 idl USER sam RESERVE 10 envi USER sam Reserves a single license for the user "sam".	Ensures that a license will always be available to a specified user or group.

Sample Options Files: Reserving Licenses for a Group

The following example shows how to define and reserve a number of licenses for a group of users, and tells the license manager not to log denied requests. Each copy of IDL or ENVI requires 10 license units on a UNIX workstation-class machine. Comment lines begin with #.

# reserve 5 IDL licenses for the research group  
RESERVE 50 idl GROUP research  
# define the users in the research group  
GROUP research josh hal bob kate beth  
# exclude anyone on a computer with the name main  
EXCLUDE idl HOST main  
# do not log license denials  
NOLOG DENIED

Or,

# reserve 5 ENVI licenses for the research group  
RESERVE 5 envi GROUP research  
# define the users in the research group  
GROUP research josh hal bob kate beth  
# exclude anyone on a computer with the name main  
EXCLUDE envi HOST main  
# do not log license denials  
NOLOG DENIED

When using INCLUDE or EXCLUDE, anyone not specifically mentioned on a list is implicitly excluded or included. For example, in the above file, everyone who is not working on a computer named "main" would be allowed to access IDL or ENVI. An EXCLUDE statement takes precedence over an INCLUDE statement. If the user "josh" were working on a computer named "main," he will not be able to access IDL or ENVI even though there is a license reserved for him.

Sample Options Files: Reserving Licenses for Individuals

The following options file reserves licenses for individuals from the "research" group defined above. If you have a group of 10 people, you can specify that a license or licenses will always be available to certain users within that group by using the RESERVE keyword in an options file. The NOLOG line pertains to the IDL QUEUE command, which allows a user to wait for an IDL license instead of entering demonstration mode when a counted license is unavailable. It tells the log file not to record any queue events.

# reserve one license for "kate"  
RESERVE 10 idl USER kate  
# reserve one license for "josh"  
RESERVE 10 idl USER josh  
# reserve 3 licenses for "hal"  
RESERVE 30 idl USER hal  
# do not log queue events  
NOLOG QUEUED

Or,

# reserve one license for "kate"  
RESERVE 1 envi USER kate  
# reserve one license for "josh"  
RESERVE 1 envi USER josh  
# reserve 3 licenses for "hal"  
RESERVE 3 envi USER hal  
# do not log queue events  
NOLOG QUEUED

IDL Online Help (March 06, 2007)