[openssl-users] Get effective OPENSSLDIR path at runtime?

[Jeffrey Walton]

Hi Everyone,

opensslconf.h has a macro for the configured OpenSSL directory. We can
find the configured location of opendssl.cnf by using OPENSSLDIR.
However, the path can be influenced by `-config` options (for openssl
apps) and the `OPENSSL_CONF` environmental variable at runtime.

How can we get effective OPENSSLDIR path at runtime?

Thanks in advance.