Re: [bug-inetutils] A command to query the libc resolver

[Mats Erik Andersson]

onsdag den 18 augusti 2010 klockan 11:18 skrev Tanguy Ortolo detta:
> Le mercredi 18 août 2010, Sergey Poznyakoff a écrit???:
> > > It is currently quite rough: no localization, no options, and so on. But
> > > I think it just works. Do you think such a tool would be worth being
> > > integrated to some software suite, such as inetutils?
> > 
> > Such a tool would certainly be useful. However, I have serveral
> > questions regarding the implementation:
> > 
> > 1. You use gethostbyname2, which is a glibc extension and is not
> > available on other systems. I'd suggest to use getaddrinfo instead.
> 
> At first time, I tried using gethostbyname, but it seems to support only
> AF_INET, and returns NULL when asked for a hostname that only resolves
> to an IPv6 address. Then I looked to getaddrinfo, but it seems to
> require a service name, that is inappropriate for simple name
> resolution???
> 

A service given as a numerical string is also accepted by getaddrinfo(3).
If the service is a priori known to represent a numerical value, any
look up is avoided by use of the flag NI_NUMERICSERV.


Regards,

Mats E A