DejaGnu: The GNU Testing Framework
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# Special variables used by test cases.

There are special variables used by test cases. These contain other information from DejaGnu. Your test cases can use these variables, with conventional meanings (as well as the variables saved in `site.exp`. You can use the value of these variables, but they should never be changed.

$prms_id

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

$item 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.

$expect_out(buffer)

  The output from the last command. This is an internal variable set by Expect. More information can be found in the Expect manual.

$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.

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