quality_check_password() used to return the same value 0 in two different cases: when pwq_allocate_context() failed with a ERRNO_IS_NOT_SUPPORTED() code, and when pwquality_check() rejected the password. As result, users of quality_check_password() used to report password weakness also in case when the underlying library was not available. Fix this by changing quality_check_password() to forward the ERRNO_IS_NOT_SUPPORTED() code to its callers, and change the callers to handle this case gracefully.
System and Service Manager
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