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

   1 /* Copyright (C) 2001 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23
  24 #include <sysdep.h>
  25 #include <sys/syscall.h>
  26 #include <bp-checks.h>
  27
  28 extern int __syscall_gethostname (char *name, size_t len);
  29
  30
  31 int
  32 __gethostname (char *name, size_t len)
  33 {
  34   int result;
  35
  36   result = INLINE_SYSCALL (gethostname, 2, CHECK_N (name, len), len);
  37
  38   if (result == 0
  39       /* See whether the string is terminated.  If not we will return
  40          an error.  */
  41       && memchr (name, '\0', len) == NULL)
  42     {
  43       __set_errno (EOVERFLOW);
  44       result = -1;
  45     }
  46
  47   return result;
  48 }
  49
  50 weak_alias (__gethostname, gethostname)