Summary of environment variables

Environment variables control how CICS® Transaction Gateway functions.

The table provides further details about the fields in the configuration file, see Configuring Gateway daemon settingsConfiguring.

Table 1. Environment variables
Environment variable	Description
AUTH_USERID_PASSWORD	Specifies whether the user ID and password is authenticated with RACF.
_BPX_SHAREAS	Specifies whether or not all processes involved in starting the Gateway daemon run in a single address space.
_BPXK_SETIBMOPT_TRANSPORT	Specifies the job name of the TCP/IP stack to be used by the Gateway daemon.
CICSCLI	Specifies a runtime path and file name for the configuration file, ctg.ini, used in remote mode.
COLUMNS	Specifies the maximum line-length for messages output to the console when the CICS Transaction Gateway is started.
CTG_EXCI_INIT	Specifies whether or not EXCI is loaded. If this variable is set to YES, EXCI is loaded.
CTG_JNI_TRACE	Sets the name of the JNI trace file.
CTG_JNI_TRACE_ON	Specifies whether or not JNI trace is enabled.
CTG_JWT_MAX_LENGTH	Specifies the maximum allowed JWT length for an ECIRequest.
CTG_MIXEDCASE_PW	Specifies whether or not mixed-case passwords are authenticated.
CTG_PIPE_REUSE	Specifies whether all allocated EXCI pipes are reused by CICS Transaction Gateway, or only a maximum of one is reused per worker thread.
CTG_RRMNAME	Specifies the name of the resource manager managing this instance of the CICS Transaction Gateway.
CTG_SWAPPABLE	Specifies whether the address space where CICS Transaction Gateway runs is swappable or nonswappable.
CTG_WIDTH	Specifies the maximum width of the STDENV script output.
CTG_XA_MAX_TRAN	Set this environment variable to limit the maximum number of concurrent XA transactions that can use the EXCI protocol in a Gateway daemon.
CTGENVVAR	Specifies the fully qualified location of a "ctgenvvar" script to be invoked by ctgstart.
CTGSTART_OPTS	Specifies options that are too long for inclusion in the JCL step.
CTGSTART_UMASK	Specifies the umask setting for the Gateway daemon.
DFHJVPIPE	Specifies the name of the specific pipe that CICS Transaction Gateway uses for EXCI calls.
DFHJVSYSTEM_nn	Specifies the name and description of an EXCI connected CICS server to be returned in response to a request for the CICS_EciListSystems function.
PATH	Specifies the path in zFS containing the runtime resources necessary to run ctgstart.
STEPLIB	Specifies the library containing the default EXCI options and the EXCI load modules.
TMPDIR	Specifies a temporary directory other than /tmp.
TZ	Specify the local time zone and daylight saving time.