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glibc/nss/ether_hton.c
Florian Weimer a025a9deef nss: Clean up function pointer/void * unions
All our targets support casts between function pointers and void *,
so we might as well use them.

This change was largely auto-generated, with the following prompts.

@getXXbyYY_r.c Remove the use of the `fct` union and replace it by
pointer casts.

Apply the same change to ether_* getnetgrent_r getnssent_r netname
publickey .

Do not use explicit `*` in function pointer calls. Replace
`(*((lookup_function) fct))` and similar with `((lookup_function) fct)`.

Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
2025-11-18 08:35:44 +01:00

56 lines
1.7 KiB
C

/* Copyright (C) 1996-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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, see
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <netinet/ether.h>
#include <netinet/if_ether.h>
#include <string.h>
#include "nsswitch.h"
/* Type of the lookup function we need here. */
typedef int (*lookup_function) (const char *, struct etherent *, char *, int,
int *);
int
ether_hostton (const char *hostname, struct ether_addr *addr)
{
nss_action_list nip;
void *fct;
int no_more;
enum nss_status status = NSS_STATUS_UNAVAIL;
struct etherent etherent;
no_more = __nss_ethers_lookup2 (&nip, "gethostton_r", NULL, &fct);
while (no_more == 0)
{
char buffer[1024];
status = ((lookup_function) fct) (hostname, &etherent, buffer,
sizeof buffer, &errno);
no_more = __nss_next2 (&nip, "gethostton_r", NULL, &fct, status, 0);
}
if (status == NSS_STATUS_SUCCESS)
memcpy (addr, etherent.e_addr.ether_addr_octet,
sizeof (struct ether_addr));
return status == NSS_STATUS_SUCCESS ? 0 : -1;
}