sysdeps/unix/sysv/linux/alpha/gethostname.c

   1 /* Copyright (C) 2001, 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2001
   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 #include <sysdep.h>
  24 #include <sys/syscall.h>
  25 #include <bp-checks.h>
  26
  27 int
  28 __gethostname (char *name, size_t len)
  29 {
  30   int result;
  31
  32   result = INLINE_SYSCALL (gethostname, 2, CHECK_N (name, len), len);
  33
  34   if (result == 0
  35       /* See whether the string is terminated.  If not we will return
  36          an error.  */
  37       && memchr (name, '\0', len) == NULL)
  38     {
  39       __set_errno (EOVERFLOW);
  40       result = -1;
  41     }
  42
  43   return result;
  44 }
  45
  46 weak_alias (__gethostname, gethostname)