Missing the re-entrant versions of functions and the differences between the re-entrant version and the default. getprotoent(3) | functions and _r differences - getprotobyname_r; - getprotobynumber_r; and, - getprotoent_r. getservent(3) | functions and _r differences - getservbyname_r; - getservbyport_r; and, - getservent_r. gethostbyname(3) | function - gethostent_r. - Info about the re-entrant functions could be repurposed from gethostbyname(3), in the last paragraph in the description. - Function definitions can be found in src/include/netdb.h