gethostname.c 1.25 KB
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/*
 * Copyright (C) 2014  Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

#include <config.h>

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

#include <isc/util.h>

#ifndef MAXHOSTNAMELEN
#ifdef HOST_NAME_MAX
#define MAXHOSTNAMELEN HOST_NAME_MAX
#else
#define MAXHOSTNAMELEN 256
#endif
#endif

int
main(int argc, char **argv) {
	char hostname[MAXHOSTNAMELEN];
	int n;

	UNUSED(argc);
	UNUSED(argv);

	n = gethostname(hostname, sizeof(hostname));
	if (n == -1) {
		perror("gethostname");
		exit(1);
	}
	fprintf(stdout, "%s\n", hostname);
	return (0);
}