jBASE Initialization
This section explains the jBASE initialisation process and lists the environment variables that cannot be imported again after this process..
Some environment variables can only be set before jBASE initialization. jBASE initialization occurs when the first jBASE program is executed for a particular PORT.
The jBASE initialization process reads the environment entries looking for possible variables required by jBASE. These environment variables continue to be valid as long as the PORT is still active. Some environment variables can be changed by subsequent program execution. The state of these variables is imported back into the local environment after program execution.
For example,
- T-ATT requires a PORT against which it saves the tape device assignment
- .SP-ASSIGN requires a PORT with which to save assignment status for print jobs
- READNEXT in a program after SELECT/GET-LIST
- With jBASE 4.1, all programs are executed in the same process unless explicitly executed through the chars(255) *.k construct.
|
UNIX |
Windows |
|---|---|
|
jBASE initialization on UNIX is usually performed in the .profile. |
jBASE initialization on Windows usually occurs when the first jBASE program executes. |
Initial Environment Variables
Variables cannot be imported again after jBASE initialization.
|
Variable |
Description |
|---|---|
|
PATH |
Pathnames of executables |
|
HOME |
Pathname of user home directory |
|
LD_LIBRARY_PATH |
Pathnames of system libraries (UNIX only) |
|
LIBPATH |
Pathnames of system libraries (AIX only) |
|
SHLIB_PATH |
Pathnames of system libraries (HPUX only) |
|
LANG |
Language type (UNIX only) |
|
LC_ALL |
Locale (Unix only) |
|
TZ |
Timezone (Unix only) |
|
TERM |
Specifies terminal type as per terminfo database |
|
TERMINFO |
Specifies directory for terminal settings |
|
JBCPORTNO |
Forced Port number for use by user. (Usually allocated) |
|
JBCLOGNAME |
User name to use in-place of login id |
|
JBCGLOBALDIR |
Pathname of jBASE global configuration directory |
|
JBCRELEASEDIR |
Pathname of jBASE release directory |
|
JBCEMULATE |
Emulation to be used for this user |
|
JEDIFILEPATH |
Directory Paths of application files location |
|
JEDIFILENAME_MD |
Pathname of file to be used for MD entries |
|
JEDIFILENAME_SYSTEM |
Pathname of file to be used for SYSTEM entries |
jBASE Programs
The following jBASE BASIC functions can be used to manipulate environment variables.
- PUTENV (For example, IF PUTENV (envar=x) THEN ELSE NULL)
- GETENV (For example, IF GETENV (envar) THEN ELSE NULL)
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