xref: /freebsd/lib/libc/gen/gethostname.c (revision 8af0a47fbac4dd73680dbc786d05aca54ae74c5b)
158f0484fSRodney W. Grimes /*
258f0484fSRodney W. Grimes  * Copyright (c) 1989, 1993
358f0484fSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
458f0484fSRodney W. Grimes  *
558f0484fSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
658f0484fSRodney W. Grimes  * modification, are permitted provided that the following conditions
758f0484fSRodney W. Grimes  * are met:
858f0484fSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
958f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
1058f0484fSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
1158f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
1258f0484fSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
1358f0484fSRodney W. Grimes  * 3. All advertising materials mentioning features or use of this software
1458f0484fSRodney W. Grimes  *    must display the following acknowledgement:
1558f0484fSRodney W. Grimes  *	This product includes software developed by the University of
1658f0484fSRodney W. Grimes  *	California, Berkeley and its contributors.
1758f0484fSRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
1858f0484fSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
1958f0484fSRodney W. Grimes  *    without specific prior written permission.
2058f0484fSRodney W. Grimes  *
2158f0484fSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2258f0484fSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2358f0484fSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2458f0484fSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2558f0484fSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2658f0484fSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2758f0484fSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2858f0484fSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2958f0484fSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3058f0484fSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3158f0484fSRodney W. Grimes  * SUCH DAMAGE.
3258f0484fSRodney W. Grimes  */
3358f0484fSRodney W. Grimes 
3458f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint)
3558f0484fSRodney W. Grimes static char sccsid[] = "@(#)gethostname.c	8.1 (Berkeley) 6/4/93";
3658f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */
3758f0484fSRodney W. Grimes 
3858f0484fSRodney W. Grimes #include <sys/param.h>
3958f0484fSRodney W. Grimes #include <sys/sysctl.h>
4058f0484fSRodney W. Grimes 
418af0a47fSJordan K. Hubbard int
4258f0484fSRodney W. Grimes gethostname(name, namelen)
4358f0484fSRodney W. Grimes 	char *name;
4458f0484fSRodney W. Grimes 	int namelen;
4558f0484fSRodney W. Grimes {
4658f0484fSRodney W. Grimes 	int mib[2];
4758f0484fSRodney W. Grimes 	size_t size;
4858f0484fSRodney W. Grimes 
4958f0484fSRodney W. Grimes 	mib[0] = CTL_KERN;
5058f0484fSRodney W. Grimes 	mib[1] = KERN_HOSTNAME;
5158f0484fSRodney W. Grimes 	size = namelen;
5258f0484fSRodney W. Grimes 	if (sysctl(mib, 2, name, &size, NULL, 0) == -1)
5358f0484fSRodney W. Grimes 		return (-1);
5458f0484fSRodney W. Grimes 	return (0);
5558f0484fSRodney W. Grimes }
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