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

   1 /* Copyright (C) 2001-2024 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, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <errno.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21
  22 #include <sysdep.h>
  23 #include <sys/syscall.h>
  24
  25 int
  26 __gethostname (char *name, size_t len)
  27 {
  28   int result;
  29
  30   result = INLINE_SYSCALL (gethostname, 2, name, len);
  31
  32   if (result == 0
  33       /* See whether the string is terminated.  If not we will return
  34          an error.  */
  35       && memchr (name, '\0', len) == NULL)
  36     {
  37       __set_errno (EOVERFLOW);
  38       result = -1;
  39     }
  40
  41   return result;
  42 }
  43
  44 weak_alias (__gethostname, gethostname)