lib/roken/gethostname.c

   1 /*
   2  * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * 3. Neither the name of the Institute nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <config.h>
  35 #include "roken.h"
  36
  37 #ifndef HAVE_GETHOSTNAME
  38
  39 #ifdef HAVE_SYS_UTSNAME_H
  40 #include <sys/utsname.h>
  41 #endif
  42
  43 /*
  44  * Return the local host's name in "name", up to "namelen" characters.
  45  * "name" will be null-terminated if "namelen" is big enough.
  46  * The return code is 0 on success, -1 on failure.  (The calling
  47  * interface is identical to gethostname(2).)
  48  */
  49
  50 int ROKEN_LIB_FUNCTION
  51 gethostname(char *name, int namelen)
  52 {
  53 #if defined(HAVE_UNAME)
  54     {
  55         struct utsname utsname;
  56         int ret;
  57
  58         ret = uname (&utsname);
  59         if (ret < 0)
  60             return ret;
  61         strlcpy (name, utsname.nodename, namelen);
  62         return 0;
  63     }
  64 #else
  65     strlcpy (name, "some.random.host", namelen);
  66     return 0;
  67 #endif
  68 }
  69
  70 #endif /* GETHOSTNAME */