mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-05 21:00:05 +00:00
41bdb6e20c
2001-07-06 Paul Eggert <eggert@twinsun.com> * manual/argp.texi: Remove ignored LGPL copyright notice; it's not appropriate for documentation anyway. * manual/libc-texinfo.sh: "Library General Public License" -> "Lesser General Public License". 2001-07-06 Andreas Jaeger <aj@suse.de> * All files under GPL/LGPL version 2: Place under LGPL version 2.1.
82 lines
2.4 KiB
C
82 lines
2.4 KiB
C
/* Copyright (C) 1996, 1997, 1999, 2001 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <errno.h>
|
|
#include <netinet/ether.h>
|
|
#include <netinet/if_ether.h>
|
|
#include <string.h>
|
|
|
|
#include <nss/nsswitch.h>
|
|
|
|
|
|
/* Type of the lookup function we need here. */
|
|
typedef int (*lookup_function) (const struct ether_addr *, struct etherent *,
|
|
char *, size_t, int *);
|
|
|
|
/* The lookup function for the first entry of this service. */
|
|
extern int __nss_ethers_lookup (service_user **nip, const char *name,
|
|
void **fctp);
|
|
|
|
|
|
int
|
|
ether_ntohost (char *hostname, const struct ether_addr *addr)
|
|
{
|
|
static service_user *startp;
|
|
static lookup_function start_fct;
|
|
service_user *nip;
|
|
lookup_function fct;
|
|
int no_more;
|
|
enum nss_status status = NSS_STATUS_UNAVAIL;
|
|
struct etherent etherent;
|
|
|
|
if (startp == NULL)
|
|
{
|
|
no_more = __nss_ethers_lookup (&nip, "getntohost_r", (void **) &fct);
|
|
if (no_more)
|
|
startp = (service_user *) -1;
|
|
else
|
|
{
|
|
startp = nip;
|
|
start_fct = fct;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
fct = start_fct;
|
|
no_more = (nip = startp) == (service_user *) -1;
|
|
}
|
|
|
|
while (no_more == 0)
|
|
{
|
|
char buffer[1024];
|
|
|
|
status = (*fct) (addr, ðerent, buffer, sizeof buffer, &errno);
|
|
|
|
no_more = __nss_next (&nip, "getntohost_r", (void **) &fct, status, 0);
|
|
}
|
|
|
|
if (status == NSS_STATUS_SUCCESS)
|
|
/* XXX This is a potential cause of trouble because the size of
|
|
the HOSTNAME buffer is not known but the interface does not
|
|
provide this information. */
|
|
strcpy (hostname, etherent.e_name);
|
|
|
|
return status == NSS_STATUS_SUCCESS ? 0 : -1;
|
|
}
|