mdw@git.distorted.org.uk Git - disorder/blob - lib/hostname.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2007 Richard Kettlewell
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  18  * USA
  19  */
  20
  21 #include "common.h"
  22
  23 #include <sys/utsname.h>
  24 #include <errno.h>
  25 #include <netdb.h>
  26
  27 #include "mem.h"
  28 #include "hostname.h"
  29 #include "log.h"
  30
  31 static const char *hostname;
  32
  33 /** @brief Return the local hostname
  34  * @return Hostname
  35  */
  36 const char *local_hostname(void) {
  37   if(!hostname) {
  38     struct utsname u;
  39     struct hostent *he;
  40
  41     if(uname(&u) < 0)
  42       fatal(errno, "error calling uname");
  43     if(!(he = gethostbyname(u.nodename)))
  44       fatal(0, "cannot resolve '%s'", u.nodename);
  45     hostname = xstrdup(he->h_name);
  46   }
  47   return hostname;
  48 }
  49
  50
  51 /*
  52 Local Variables:
  53 c-basic-offset:2
  54 comment-column:40
  55 fill-column:79
  56 indent-tabs-mode:nil
  57 End:
  58 */