Environment Variables

Environment variables are used to specify the execution environment for a process. Under OpenEdition, environment variables can be assigned in a number of ways:

For processes running under the shell, these variables can be assigned using /etc/profile or the user's .profile file at logon time. The ENV environment variable can be used at other times.
For Language Environment programs started from MVS, the ENVAR run-time option can be used. The _CEE_ENVFILE environment variable can be used to load environment variable settings from an HFS file or a DD statement. For example, loads environment variable settings from DD statement ENVVARS.
With BPXBATCH, the STDENV DD statement can be used. This can point to either an MVS dataset or an HFS file.
The env shell command can be used to invoke a program from the shell and pass environment variable settings to it.

Language Environment Runtime Options

_CEE_RUNOPTS can be used to pass Language Environment runtime options to a program started from the OMVS shell.

_CEEDUMP_DIR can be used to control where Language Environment CEEDUMP reports are stored. Otherwise, they will be stored in the current working directory if the current user has write access and it is not the HFS root (/). Otherwise, it will go to the temporary file directory, usually /tmp.

Time Zones

The TZ (Posix) or _TZ (non-Posix) environment variable is used to set time zone. If this is not set, UTC (formerly UTC) time may be provided.

For More Information

Visit the Language Environment or OpenEdition page here.
Refer to the publications

OS/390 C/C++ Programming Guide
OS/390: Language Environment for OS/390 & VM Programming Guide
OS/390 UNIX System Services Command Reference