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由 Andrea Bolognani 提交于
We will soon need to be able to return a NULL pointer without the caller considering that an error: to make it possible, change the return type to int and use an out parameter for the string instead. Add some documentation for the function as well. Signed-off-by: NAndrea Bolognani <abologna@redhat.com> Reviewed-by: NLaine Stump <laine@laine.org>
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