NAME

     fido_init, fido_set_log_handler — initialise the FIDO2 library

SYNOPSIS

     #include <fido.h>

     typedef void fido_log_handler_t(const char *);

     void
     fido_init(int flags);

     void
     fido_set_log_handler(fido_log_handler_t *handler);

DESCRIPTION

     The fido_init() function initialises the libfido2 library.  Its invocation must precede that of any other
     libfido2 function in the context of the executing thread.

     If FIDO_DEBUG is set in flags, then debug output will be emitted by libfido2 on stderr.  Alternatively, the
     FIDO_DEBUG environment variable may be set.

     If FIDO_DISABLE_U2F_FALLBACK is set in flags, then libfido2 will not fallback to U2F in fido_dev_open(3) if
     a device claims to support FIDO2 but fails to respond to a CTAP 2.0 greeting.

     The fido_set_log_handler() function causes handler to be called for each log line generated in the context
     of the executing thread.  Lines passed to handler include a trailing newline character and are not printed
     by libfido2 on stderr.

SEE ALSO

     fido_assert_new(3), fido_cred_new(3), fido_dev_info_manifest(3), fido_dev_open(3)