sysdeps/nacl/gethostname.c

   1 /* Get current host's name.  NaCl version.
   2    Copyright (C) 2015 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <string.h>
  21 #include <unistd.h>
  22
  23 /* Put the name of the current host in no more than LEN bytes of NAME.
  24    The result is null-terminated if LEN is large enough for the full
  25    name and the terminator.  */
  26 int
  27 __gethostname (char *name, size_t len)
  28 {
  29   static const char hostname[] = "naclhost";
  30
  31   int result = 0;
  32   size_t copy = sizeof hostname;
  33
  34   if (len < copy)
  35     {
  36       errno = ENAMETOOLONG;
  37       result = -1;
  38       copy = len;
  39     }
  40
  41   memcpy (name, hostname, copy);
  42
  43   return result;
  44 }
  45 weak_alias (__gethostname, gethostname)