misc/getdomain.c

   1 /* Copyright (C) 1994,95,97,2000,02 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library 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 GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    02111-1307 USA.  */
  18
  19 /* Put the name of the current YP domain in no more than LEN bytes of NAME.
  20    The result is null-terminated if LEN is large enough for the full
  21    name and the terminator.  */
  22
  23 #include <errno.h>
  24 #include <unistd.h>
  25 #include <sys/param.h>
  26 #include <sys/utsname.h>
  27 #include <string.h>
  28
  29 #if _UTSNAME_DOMAIN_LENGTH
  30 /* The `uname' information includes the domain name.  */
  31
  32 int
  33 getdomainname (name, len)
  34     char *name;
  35     size_t len;
  36 {
  37   struct utsname u;
  38   size_t u_len;
  39
  40   if (uname (&u) < 0)
  41     return -1;
  42
  43   u_len = strlen (u.domainname);
  44   memcpy (name, u.domainname, MIN (u_len + 1, len));
  45   return 0;
  46 }
  47
  48 #else
  49
  50 int
  51 getdomainname (name, len)
  52      char *name;
  53      size_t len;
  54 {
  55   __set_errno (ENOSYS);
  56   return -1;
  57 }
  58
  59 stub_warning (getdomainname)
  60 #include <stub-tag.h>
  61
  62 #endif
  63
  64 libc_hidden_def (getdomainname)