contrib/cvs/lib/gethostname.c

   1 /* hostname.c -- use uname() to get the name of the host
   2    Copyright (C) 1992 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.  */
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include "config.h"
  16 #endif
  17
  18 #if defined(STDC_HEADERS) || defined(USG)
  19 #include <string.h>
  20 #ifndef index
  21 #define index strchr
  22 #endif
  23 #else
  24 #include <strings.h>
  25 #endif
  26
  27 #include <sys/utsname.h>
  28
  29 /* Put this host's name into NAME, using at most NAMELEN characters */
  30
  31 int
  32 gethostname(name, namelen)
  33      char *name;
  34      int namelen;
  35 {
  36   struct utsname ugnm;
  37
  38   if (uname(&ugnm) < 0)
  39     return (-1);
  40
  41   (void) strncpy(name, ugnm.nodename, namelen-1);
  42   name[namelen-1] = '\0';
  43
  44   return (0);
  45 }