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Annotation of src/lib/libc/gen/getdomainname.c, Revision 1.12.56.1

1.12.56.1! yamt        1: /*     $NetBSD: getdomainname.c,v 1.12 2003/08/07 16:42:49 agc Exp $   */
1.2       cgd         2:
1.1       cgd         3: /*
                      4:  * Copyright (c) 1989, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * Redistribution and use in source and binary forms, with or without
                      8:  * modification, are permitted provided that the following conditions
                      9:  * are met:
                     10:  * 1. Redistributions of source code must retain the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer.
                     12:  * 2. Redistributions in binary form must reproduce the above copyright
                     13:  *    notice, this list of conditions and the following disclaimer in the
                     14:  *    documentation and/or other materials provided with the distribution.
1.12      agc        15:  * 3. Neither the name of the University nor the names of its contributors
1.1       cgd        16:  *    may be used to endorse or promote products derived from this software
                     17:  *    without specific prior written permission.
                     18:  *
                     19:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     20:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     21:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     22:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     23:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     24:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     25:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     26:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     27:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     28:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     29:  * SUCH DAMAGE.
                     30:  */
                     31:
1.4       christos   32: #include <sys/cdefs.h>
1.1       cgd        33: #if defined(LIBC_SCCS) && !defined(lint)
1.2       cgd        34: #if 0
                     35: static char sccsid[] = "@(#)gethostname.c      8.1 (Berkeley) 6/4/93";
                     36: #else
1.12.56.1! yamt       37: __RCSID("$NetBSD: getdomainname.c,v 1.12 2003/08/07 16:42:49 agc Exp $");
1.2       cgd        38: #endif
1.1       cgd        39: #endif /* LIBC_SCCS and not lint */
                     40:
1.5       jtc        41: #include "namespace.h"
1.1       cgd        42: #include <sys/param.h>
                     43: #include <sys/sysctl.h>
1.8       lukem      44:
                     45: #include <assert.h>
                     46: #include <errno.h>
1.4       christos   47: #include <unistd.h>
1.7       kleink     48:
                     49: #ifdef __weak_alias
1.11      mycroft    50: __weak_alias(getdomainname,_getdomainname)
1.7       kleink     51: #endif
1.1       cgd        52:
1.3       jtc        53: int
1.12.56.1! yamt       54: getdomainname(char *name, size_t namelen)
1.1       cgd        55: {
                     56:        int mib[2];
                     57:        size_t size;
1.10      is         58:        int olderrno;
1.8       lukem      59:
                     60:        _DIAGASSERT(name != NULL);
1.1       cgd        61:
                     62:        mib[0] = CTL_KERN;
                     63:        mib[1] = KERN_DOMAINNAME;
                     64:        size = namelen;
1.10      is         65:        olderrno = errno;
                     66:        if (sysctl(mib, 2, name, &size, NULL, 0) == -1) {
                     67:                if (errno == ENOMEM) {
                     68:                        errno = olderrno;
                     69:                        return (0);
                     70:                }
1.1       cgd        71:                return (-1);
1.10      is         72:        }
                     73:
1.1       cgd        74:        return (0);
                     75: }

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