ARES_GETHOSTBYNAME(3) Library Functions Manual ARES_GETHOSTBYNAME(3)
NAME
ares_gethostbyname_file - Lookup a name in the system's hosts file
SYNOPSIS
#include <ares.h>
int ares_gethostbyname_file(ares_channel_t *channel, const char *name,
int family, struct hostent **host)
DESCRIPTION
The ares_gethostbyname_file function performs a host lookup by name
against the system's hosts file (or equivalent local hostname
database). The channel parameter is required, but no asynchronous
queries are performed. Instead, the lookup is done via the same
mechanism used to perform 'f' lookups (see the lookups options field in
ares_init_options(3)). The parameter name gives the hostname as a NUL-
terminated C string, and family gives the desired type of address for
the resulting host entry.
The return value indicates whether the query succeeded and, if not, how
it failed. It may have any of the following values:
ARES_SUCCESS The host lookup completed successfully and host now
points to the result (and must be freed with
ares_free_hostent(3)).
ARES_ENOTFOUND The hostname name was not found.
ARES_EFILE There was a file I/O error while performing the
lookup.
ARES_ENOMEM Memory was exhausted.
On successful completion of the query, the pointer pointed to by host
points to a struct hostent containing the address of the host returned
by the lookup. The user must free the memory pointed to by host when
finished with it by calling ares_free_hostent(3). If the lookup did
not complete successfully, host will be NULL.
AVAILABILITY
Added in c-ares 1.5.4
SEE ALSO
ares_gethostbyname(3), ares_free_hostent(3), ares_init_options(3)
25 July 1998 ARES_GETHOSTBYNAME(3)
c-ares 1.30.0 - Generated Thu Jun 13 10:40:33 CDT 2024