/* Main function for test programs.
Copyright (C) 2016-2017 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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modify it under the terms of the GNU Lesser General Public
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/* This file should be included from test cases. It will define a
main function which provides the test wrapper.
It assumes that the test case defines a function
int do_test (void);
and arranges for that function being called under the test wrapper.
The do_test function should return 0 to indicate a passing test, 1
to indicate a failing test, or 77 to indicate an unsupported test.
Other result values could be used to indicate a failing test, but
the result of the expression is passed to exit and exit only
returns the lower 8 bits of its input. A non-zero return with some
values could cause a test to incorrectly be considered passing when
it really failed. For this reason, the function should always
return 0 (EXIT_SUCCESS), 1 (EXIT_FAILURE), or 77
The test function may print out diagnostic or warning messages as well
as messages about failures. These messages should be printed to stdout
and not stderr so that the output is properly ordered with respect to
the rest of the glibc testsuite run output.
Several preprocessors macros can be defined before including this
The name of the do_test function can be changed with the
TEST_FUNCTION macro. It must expand to the desired function name.
If the test case needs access to command line parameters, it must
define the TEST_FUNCTION_ARGV macro with the name of the test
function. It must have the following type:
int TEST_FUNCTION_ARGV (int argc, char **argv);
This overrides the do_test default function and is incompatible
with the TEST_FUNCTION macro.
If PREPARE is defined, it must expand to the name of a function of
void PREPARE (int argc, char **);
This function will be called early, after parsing the command line,
but before running the test, in the parent process which acts as
the test supervisor.
If CLEANUP_HANDLER is defined, it must expand to the name of a
function of the type
void CLEANUP_HANDLER (void);
This function will be called from the timeout (SIGALRM) signal
If EXPECTED_SIGNAL is defined, it must expanded to a constant which
denotes the expected signal number.
If EXPECTED_STATUS is defined, it must expand to the expected exit
If TIMEOUT is defined, it must be positive constant. It overrides
the default test timeout and is measured in seconds.
If TEST_NO_MALLOPT is defined, the test wrapper will not call
Custom command line handling can be implemented by defining the
CMDLINE_OPTION macro (after including the <getopt.h> header; this
requires _GNU_SOURCE to be defined). This macro must expand to a
to a comma-separated list of braced initializers for struct option
from <getopt.h>, with a trailing comma. CMDLINE_PROCESS can be
defined as the name of a function which is called to process these
options. The function is passed the option character/number and
has this type:
void CMDLINE_PROCESS (int);
main (int argc, char **argv)
struct test_config test_config;
memset (&test_config, 0, sizeof (test_config));
test_config.prepare_function = (PREPARE);
#if defined (TEST_FUNCTION) && defined (TEST_FUNCTON_ARGV)
# error TEST_FUNCTION and TEST_FUNCTION_ARGV cannot be defined at the same time
#if defined (TEST_FUNCTION)
test_config.test_function = TEST_FUNCTION;
#elif defined (TEST_FUNCTION_ARGV)
test_config.test_function_argv = TEST_FUNCTION_ARGV;
test_config.test_function = do_test;
test_config.cleanup_function = CLEANUP_HANDLER;
test_config.expected_signal = (EXPECTED_SIGNAL);
test_config.expected_status = (EXPECTED_STATUS);
test_config.no_mallopt = 1;
test_config.timeout = TIMEOUT;
struct option options =
test_config.options = &options;
test_config.cmdline_function = CMDLINE_PROCESS;
return support_test_main (argc, argv, &test_config);