al_ferror - Allegro 5 API

       Returns  non-zero  if  the error indicator is set on the given file, i.e. there was some sort of previous
       error.  The error code may be system or file interface specific.

       al_ferror - Allegro 5 API

al_feof(3alleg5), al_fclearerr(3alleg5), al_ferrmsg(3alleg5)

Allegro reference manual                                                                      al_ferror(3alleg5)

              #include <allegro5/allegro.h>

              int al_ferror(ALLEGRO_FILE *f)