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DejaGnu Testing Framework

6.5 Special variables used by test cases

Your test cases can use these variables, with conventional meanings (as well as the variables saved in `site.exp' see section Setting runtest defaults):

These variables are available to all test cases.

prms_id

The tracking system (e.g. GNATS) number identifying a corresponding bugreport. (`0' if you do not specify it in the test script.)

bug_id

An optional bug id; may reflect a bug identification from another organization. (`0' if you do not specify it.)

subdir

The subdirectory for the current test case.

These variables should never be changed. They appear in most tests.

expect_out(buffer)

The output from the last command. This is an internal variable set by expect.

exec_output

This is the output from a tool_load command. This only applies to tools like GCC and GAS which produce an object file that must in turn be executed to complete a test.

comp_output

This is the output from a tool_start command. This is conventionally used for batch oriented programs, like GCC and GAS, that may produce interesting output (warnings, errors) without further interaction.