source: rtems-libbsd/freebsd/bin/hostname/hostname.c @ 50e82a6

#include <machine/rtems-bsd-user-space.h>

/*-
 * Copyright (c) 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static char const copyright[] =
"@(#) Copyright (c) 1988, 1993\n\
        The Regents of the University of California.  All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)hostname.c  8.1 (Berkeley) 5/31/93";
#endif /* not lint */
#endif
#ifdef __rtems__
#define __need_getopt_newlib
#include <getopt.h>
#include <rtems/netcmds-config.h>
#include <machine/rtems-bsd-program.h>
#include <machine/rtems-bsd-commands.h>
#endif /* __rtems__ */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <rtems/bsd/sys/param.h>

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

static void usage(void);

#ifdef __rtems__
static int main(int argc, char *argv[]);

static int hostname_command(int argc, char *argv[])
{
        int exit_code;

        rtems_bsd_program_lock();

        exit_code = rtems_bsd_program_call_main("hostname", main, argc, argv);

        rtems_bsd_program_unlock();

        return exit_code;
}

rtems_shell_cmd_t rtems_shell_HOSTNAME_Command = {
  .name = "hostname",
  .usage = "hostname [-fs] [name-of-host]",
  .topic = "net",
  .command = hostname_command
};
#endif /* __rtems__ */
int
main(int argc, char *argv[])
{
        int ch, sflag;
        char *p, hostname[MAXHOSTNAMELEN];
#ifdef __rtems__
        struct getopt_data getopt_data;
        memset(&getopt_data, 0, sizeof(getopt_data));
#define optind getopt_data.optind
#define getopt(argc, argv, opt) getopt_r(argc, argv, "+" opt, &getopt_data)
#endif /* __rtems__ */

        sflag = 0;
        while ((ch = getopt(argc, argv, "fs")) != -1)
                switch (ch) {
                case 'f':
                        /*
                         * On Linux, "hostname -f" prints FQDN.
                         * BSD "hostname" always prints FQDN by
                         * default, so we accept but ignore -f.
                         */
                        break;
                case 's':
                        sflag = 1;
                        break;
                case '?':
                default:
                        usage();
                }
        argc -= optind;
        argv += optind;

        if (argc > 1)
                usage();

        if (*argv) {
                if (sethostname(*argv, (int)strlen(*argv)))
                        err(1, "sethostname");
        } else {
                if (gethostname(hostname, (int)sizeof(hostname)))
                        err(1, "gethostname");
                if (sflag) {
                        p = strchr(hostname, '.');
                        if (p != NULL)
                                *p = '\0';
                }
                (void)printf("%s\n", hostname);
        }
        exit(0);
}

static void
usage(void)
{

        (void)fprintf(stderr, "usage: hostname [-fs] [name-of-host]\n");
        exit(1);
}