Thread: C: capturing stdout

i want write testcase testing output of function printing stderr.
somehow need stderr within same process.
want avoid having execute testcase wrapperscript.

found can reopen stderr filestream freopen seems impossible reattach output stderr again in portable way.
unfortunately too.

there way i'm overlooking capture stderr , resetting in c, without changing outputting functions code or using wrapper program around testcase?

pseudo code i'm looking for:

code:

to_test():    print "output"    test_function():    file = freopen("file", stderr)    to_test();    assert(compare_with_golden_file(file, golden))    reset_stderr

wait? in c? why using python in example?

edit: oh... pseudocode, sorry that.

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