auth_getoption - Search an option string

       This is a convenience function for parsing account options, as received by the callback function invoked
       by auth_generic_meta(3)[1], auth_login_meta(3)[2], auth_getuserinfo_meta(3)[3], and auth_passwd(3)[4].

       options is the options field from authinfo (which can be NULL). As described in auth_generic_meta(3)[1]
       (and the others), it is a comma-separated list of “keyword=value” pairs.

       auth_getoption searches options for a keyword.

       auth_getoption - Search an option string

        1. auth_generic_meta(3)
           http://www.courier-mta.org/authlib/auth_generic.html

        2. auth_login_meta(3)
           http://www.courier-mta.org/authlib/auth_login.html

        3. auth_getuserinfo_meta(3)
           http://www.courier-mta.org/authlib/auth_getuserinfo.html

        4. auth_passwd(3)
           http://www.courier-mta.org/authlib/auth_passwd.html

        5. authlib(3)
           http://www.courier-mta.org/authlib/authlib.html

Double Precision, Inc.                             10/28/2020                                  AUTH_GETOPTION(3)

       If options does not have the keyword, auth_getoption returns NULL with errno set to ENOENT. Otherwise
       auth_getoption allocates a buffer for value, and returns it. It is the caller's responsibility to free(3)
       the returned buffer.

       auth_getoption returns NULL with errno set to ENOMEM if it cannot allocate a buffer.

authlib(3)[5], auth_generic_meta(3)[1], auth_login_meta(3)[2], auth_getuserinfo_meta(3)[3].

       #include <courierauth.h>

       char*value=auth_getoption(constchar*options,constchar*keyword);