1  /* Determine whether descriptor has given property.
       2     Copyright (C) 1996-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       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     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <sys/stat.h>
      21  #include <sys/socket.h>
      22  #include <sys/types.h>
      23  
      24  int
      25  isfdtype (int fildes, int fdtype)
      26  {
      27    struct __stat64_t64 st;
      28    int result;
      29  
      30    {
      31      int save_error = errno;
      32      result = __fstat64_time64 (fildes, &st);
      33      __set_errno (save_error);
      34    }
      35  
      36    return result ?: (st.st_mode & S_IFMT) == (mode_t) fdtype;
      37  }