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 3 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,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU 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, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file lib/hostname.c
  19  * @brief Get the local hostname
  20  */
  21
  22 #include "common.h"
  23
  24 #include <sys/utsname.h>
  25 #include <errno.h>
  26 #include <netdb.h>
  27
  28 #include "mem.h"
  29 #include "hostname.h"
  30 #include "log.h"
  31
  32 static const char *hostname;
  33
  34 /** @brief Return the local hostname
  35  * @return Hostname
  36  */
  37 const char *local_hostname(void) {
  38   if(!hostname) {
  39     struct utsname u;
  40     struct hostent *he;
  41
  42     if(uname(&u) < 0)
  43       disorder_fatal(errno, "error calling uname");
  44     if(!(he = gethostbyname(u.nodename)))
  45       disorder_fatal(0, "cannot resolve '%s'", u.nodename);
  46     hostname = xstrdup(he->h_name);
  47   }
  48   return hostname;
  49 }
  50
  51
  52 /*
  53 Local Variables:
  54 c-basic-offset:2
  55 comment-column:40
  56 fill-column:79
  57 indent-tabs-mode:nil
  58 End:
  59 */