1  /* Copyright (C) 2001-2023 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)