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/* ifconfig.c -- network interface configuration utility
Copyright (C) 2001-2025 Free Software Foundation, Inc.
This file is part of GNU Inetutils.
GNU Inetutils is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at
your option) any later version.
GNU Inetutils 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see `http://www.gnu.org/licenses/'. */
/* Written by Marcus Brinkmann. */
#include <config.h>
#include <sys/stat.h>
#include <stdio.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#if STDC_HEADERS
# include <stdlib.h>
#else
# ifndef HAVE_STRCHR
# define strchr index
# define strrchr rindex
# endif
#endif
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <net/if.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <progname.h>
#include "ifconfig.h"
int
main (int argc, char *argv[])
{
int err = 0;
int sfd;
struct ifconfig *ifp;
set_program_name (argv[0]);
parse_cmdline (argc, argv);
sfd = socket (AF_INET, SOCK_STREAM, 0);
if (sfd < 0)
{
error (0, errno, "socket error");
exit (EXIT_FAILURE);
}
for (ifp = ifs; ifp < ifs + nifs; ifp++)
{
if (list_mode)
{
/* Protect against mistakes in use of `-i'. */
if (!if_nametoindex (ifp->name))
continue;
/* Use ERR as a marker of previous output.
* It will never interfere with a call to configure_if(). */
if (err++)
putchar (' ');
printf ("%s", ifp->name);
continue;
}
err = configure_if (sfd, ifp);
if (err)
break;
}
if (list_mode && err)
putchar ('\n');
close (sfd);
return err;
}
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