24.
Variable types used in TETware
TETware uses the following types of variables:
-
Environment variables.
These are variables that are read from the environment when
tcc
is invoked.
-
Configuration variables.
These are variables read from configuration files that you must
provide.
-
Communication variables.
These are variables that
tcc
puts in the environment when it executes a test case or tool.
These types of variable are logically distinct.
In particular, it should be understood that configuration variables and
environment variables are not the same.
Configuration variables
These variables are used by
tcc
and may also be accessed by API-conforming test cases and tools.
When the C API is used, configuration variables may be accessed by
calling the
tet_getvar()
API function.
When the Shell or Korn Shell API is used, the TCM makes configuration
variables available as readonly shell variables but does not export
them.
In Distributed TETware it is possible to define configuration variables
with different values on different systems.
Distributed configuration variables
As with configuration variables, the Distributed
tcc
reads distributed configuration variables from a file that you must
provide.
However, the APIs do not make distributed configuration variables
available to test cases and tools.
Communication variables
These are environment variables that
tcc
uses to pass information to TCMs.
They can be accessed by test cases and tools but should not be modified
since the operation of the APIs depend on them.
See also
-
"Communication variables'' and
"Configuration files''
in the TETware Programmers Guide.
-
"Environment variables''
in the TETware User Guide.
-
The
tcc
manual page in the TETware User Guide.
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